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RG C, Tallon A, Latch EK. Chronic Wasting Disease Research in North America: A systematic review highlighting species-wise and interdisciplinary research trends. Prion 2025; 19:1-16. [PMID: 39960789 PMCID: PMC11834482 DOI: 10.1080/19336896.2025.2464753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2024] [Revised: 12/02/2024] [Accepted: 01/13/2025] [Indexed: 02/20/2025] Open
Abstract
Chronic Wasting Disease (CWD) research has experienced significant growth, spanning diverse disciplines such as genetics, immunology, modelling, and behaviour. To gain a broad understanding of the changes in CWD research focusing cervids, we analysed temporal trends in study location, species, genus investigated, infection types, and population type since the discovery of CWD in 1980s. Our findings indicate that Colorado, USA, published the highest number of articles, followed by Wisconsin, and publication numbers correlated with reported CWD cases in states/provinces. Odocoileus emerged as the most studied genus. Wild populations are studied more commonly than captive populations. Keyword analysis of transmission types shows the discovery of novel transmission modes in the recent past. We also used a novel approach to categorize studies into five themes: field-based, lab-based, math/analytics/modelling-based, management-based, and human dimensions. Overall, most studies captured had a lab-based component. The interdisciplinary or transdisciplinary nature of major disciplines and evolving trends in keywords, particularly the increased reliance on genetics/genomics, accentuate the beginning of using genomics to under and tackle CWD at a fundamental scale. Encapsulated in our analysis, these dynamic changes offer valuable insights for navigating CWD through scientifically informed proactive management decisions in conjunction with existing surveillance efforts not only for the commonly studied species but also for potentially susceptible species.
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Affiliation(s)
- Chandika RG
- Department of Biological Sciences, University of Wisconsin, Milwaukee, WI, USA
| | - Anaïs Tallon
- Department of Biological Sciences, University of Wisconsin, Milwaukee, WI, USA
- Marine Conservation Group, Helmholtz Institute for Functional Marine Biodiversity (HIFMB), Oldenburg, Germany
| | - Emily K. Latch
- Department of Biological Sciences, University of Wisconsin, Milwaukee, WI, USA
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2
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Kamble K, Kumar U, Aahra H, Yadav M, Bhola S, Gupta S. A novel ER stress regulator ARL6IP5 induces reticulophagy to ameliorate the prion burden. Autophagy 2025; 21:598-618. [PMID: 39394963 PMCID: PMC11849938 DOI: 10.1080/15548627.2024.2410670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 09/20/2024] [Accepted: 09/26/2024] [Indexed: 10/14/2024] Open
Abstract
Prion disease is a fatal and infectious neurodegenerative disorder caused by the trans-conformation conversion of PRNP/PrPC to PRNP/PrPSc. Accumulated PRNP/PrPSc-induced ER stress causes chronic unfolded protein response (UPR) activation, which is one of the fundamental steps in prion disease progression. However, the role of various ER-resident proteins in prion-induced ER stress is elusive. This study demonstrated that ARL6IP5 is compensatory upregulated in response to chronically activated UPR in the cellular prion disease model (RML-ScN2a). Furthermore, overexpression of ARL6IP5 overcomes ER stress by lowering the expression of chronically activated UPR pathway proteins. We discovered that ARL6IP5 induces reticulophagy to reduce the PRNP/PrPSc burden by releasing ER stress. Conversely, the knockdown of ARL6IP5 leads to inefficient macroautophagic/autophagic flux and elevated PRNP/PrPSc burden. Our study also uncovered that ARL6IP5-induced reticulophagy depends on Ca2+-mediated AMPK activation and can induce 3 MA-inhibited autophagic flux. The detailed mechanistic study revealed that ARL6IP5-induced reticulophagy involves interaction with soluble reticulophagy receptor CALCOCO1 and lysosomal marker LAMP1, leading to degradation in lysosomes. Here, we delineate the role of ARL6IP5 as a novel ER stress regulator and reticulophagy inducer that can effectively reduce the misfolded PRNP/PrPSc burden. Our research opens up a new avenue of selective autophagy in prion disease and represents a potential therapeutic target.Abbreviations: ARL6IP5: ADP ribosylation factor-like GTPase 6 interacting protein 5; AMPK: adenosine 5'-monophosphate (AMP)-activated protein kinase; CALCOCO1: calcium binding and coiled-coil domain 1; CQ: chloroquine; DAPI: 4'6-diamino-2-phenylindole; ER: endoplasmic reticulum; ERPHS: reticulophagy/ER-phagy sites; KD: knockdown; KD-CON: knockdown control; LAMP1: lysosomal-associated membrane protein 1; MAP1LC3/LC3, microtubule-associated protein 1 light chain 3; MTOR: mechanistic target of rapamycin kinase; MβCD: methyl beta cyclodextrin; 3 MA: 3-methyladenine; OE: overexpression; OE-CON: empty vector control; PrDs: prion diseases; PRNP/PrPC: cellular prion protein (Kanno blood group); PRNP/PrPSc: infectious scrapie misfolded PRNP; Tm: tunicamycin; UPR: unfolded protein response; UPS: ubiquitin-proteasome system.
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Affiliation(s)
- Kajal Kamble
- Molecular Sciences Lab, National Institute of Immunology, New Delhi, India
| | - Ujjwal Kumar
- Structural Immunology Lab, International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | - Harsh Aahra
- Molecular Sciences Lab, National Institute of Immunology, New Delhi, India
| | - Mohit Yadav
- Immuno-Metabolism Lab, National Institute of Immunology, New Delhi, India
| | - Sumnil Bhola
- Molecular Sciences Lab, National Institute of Immunology, New Delhi, India
| | - Sarika Gupta
- Molecular Sciences Lab, National Institute of Immunology, New Delhi, India
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3
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Li X, Pei R, Fei Z, Chen Z, Lin F, Sun P, Cao H. Could Blood Transfusion Increase the Risk of Alzheimer's Disease? A Narrative Review. Healthcare (Basel) 2025; 13:452. [PMID: 40077014 PMCID: PMC11898722 DOI: 10.3390/healthcare13050452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2024] [Revised: 02/05/2025] [Accepted: 02/18/2025] [Indexed: 03/14/2025] Open
Abstract
Alzheimer's disease (AD) is the most common progressive neurodegenerative disease, and its pathogenesis is complex. In addition to amyloid-β and phosphorylated tau, inflammation and microbial infections also play a role in the development of AD. Currently, there is no effective clinical intervention to cure AD or completely halt its progression. Blood transfusion, a critical life-saving medical procedure widely employed in modern healthcare, faces growing demand due to global population aging. However, whether blood transfusion could increase the risk of AD is still not clear. Aβ and tau play major roles in the pathogenesis of AD and may possess the potential for transmission through blood transfusion. Iron overload and chronic inflammation, which can independently influence AD pathogenesis, may result from repeated transfusions. Additionally, herpesvirus, known to accelerate AD progression, can also be potentially transmitted by blood transfusion. In this study, recent advances in the associations between blood transfusion and the occurrence and development of AD were reviewed, and whether blood transfusion could increase the risk of AD was discussed. Furthermore, the related proposals for blood management and future research were advanced to provide references for the prevention and control of AD.
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Affiliation(s)
| | | | | | | | | | - Pan Sun
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu 610052, China; (X.L.); (R.P.); (Z.F.); (Z.C.); (F.L.)
| | - Haijun Cao
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu 610052, China; (X.L.); (R.P.); (Z.F.); (Z.C.); (F.L.)
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4
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Kuanaeva RM, Vaneev AN, Gorelkin PV, Erofeev AS. Nanopipettes as a Potential Diagnostic Tool for Selective Nanopore Detection of Biomolecules. BIOSENSORS 2024; 14:627. [PMID: 39727892 DOI: 10.3390/bios14120627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2024] [Revised: 12/14/2024] [Accepted: 12/16/2024] [Indexed: 12/28/2024]
Abstract
Nanopipettes, as a class of solid-state nanopores, have evolved into universal tools in biomedicine for the detection of biomarkers and different biological analytes. Nanopipette-based methods combine high sensitivity, selectivity, single-molecule resolution, and multifunctionality. The features have significantly expanded interest in their applications for the biomolecular detection, imaging, and molecular diagnostics of real samples. Moreover, the ease of manufacturing nanopipettes, coupled with their compatibility with fluorescence and electrochemical methods, makes them ideal for portable point-of-care diagnostic devices. This review summarized the latest progress in nanopipette-based nanopore technology for the detection of biomarkers, DNA, RNA, proteins, and peptides, in particular β-amyloid or α-synuclein, emphasizing the impact of technology on molecular diagnostics. By addressing key challenges in single-molecule detection and expanding applications in diverse biological areas, nanopipettes are poised to play a transformative role in the future of personalized medicine.
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Affiliation(s)
- Regina M Kuanaeva
- Research Laboratory of Biophysics, National University of Science and Technology "MISIS", 119049 Moscow, Russia
| | - Alexander N Vaneev
- Research Laboratory of Biophysics, National University of Science and Technology "MISIS", 119049 Moscow, Russia
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Petr V Gorelkin
- Research Laboratory of Biophysics, National University of Science and Technology "MISIS", 119049 Moscow, Russia
| | - Alexander S Erofeev
- Research Laboratory of Biophysics, National University of Science and Technology "MISIS", 119049 Moscow, Russia
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia
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5
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Pal S, Udgaonkar JB. Rigidifying the β2-α2 Loop in the Mouse Prion Protein Slows down Formation of Misfolded Oligomers. Biochemistry 2024; 63:3114-3125. [PMID: 39565640 DOI: 10.1021/acs.biochem.4c00435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2024]
Abstract
Transmissible Spongiform Encephalopathies are fatal neurodegenerative diseases caused by the misfolding of the cellular prion protein (PrPC) into its pathological isoform (PrPSc). Efficient transmission of PrPSc occurs within the same species, but a species barrier limits interspecies transmission. While PrP structure is largely conserved among mammals, variations at the β2-α2 loop are observed, and even minor changes in the amino acid sequence of the β2-α2 loop can significantly affect transmission efficiency. The present study shows that the introduction of the elk/deer-specific amino acid substitutions at positions 169 (Ser to Asn) and 173 (Asn to Thr) into the mouse prion protein, which are associated with the structural rigidity of the β2-α2 loop, has a substantial impact on protein dynamics as well as on the misfolding pathways of the protein. Native state hydrogen-deuterium exchange studies coupled with mass spectrometry, show that the rigid loop substitutions stabilize not only the β2-α2 loop but also the C-terminal end of α3, suggesting that molecular interactions between these two segments are strengthened. Moreover, the energy difference between the native state and multiple misfolding-prone partially unfolded forms (PUFs) present at equilibrium, is increased. The decreased accessibility of the PUFs from the native state leads to a slowing down of the misfolding of the protein. The results of this study provide important insights into the early events of conformational conversion of prion protein into β-rich oligomers, and add to the evidence that the β2-α2 loop is a key determinant in prion protein aggregation.
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Affiliation(s)
- Suman Pal
- Indian Institute of Science Education and Research Pune Pune 411008, India
| | - Jayant B Udgaonkar
- Indian Institute of Science Education and Research Pune Pune 411008, India
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6
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Sanchez-Martin V. Opportunities and challenges with G-quadruplexes as promising targets for drug design. Expert Opin Drug Discov 2024; 19:1339-1353. [PMID: 39291583 DOI: 10.1080/17460441.2024.2404230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2024] [Accepted: 09/10/2024] [Indexed: 09/19/2024]
Abstract
INTRODUCTION G-quadruplexes (G4s) are secondary structures formed in guanine-rich regions of nucleic acids (both DNA and RNA). G4s are significantly enriched at regulatory genomic regions and are associated with important biological processes ranging from telomere homeostasis and genome instability to transcription and translation. Importantly, G4s are related to health and diseases such as cancer, neurological diseases, as well as infections with viruses and microbial pathogens. Increasing evidence suggests the potential of G4s for designing new diagnostic and therapeutic strategies although in vivo studies are still at early stages. AREAS COVERED This review provides an updated summary of the literature describing the impact of G4s in human diseases and different approaches based on G4 targeting in therapy. EXPERT OPINION Within the G4 field, most of the studies have been performed in vitro and in a descriptive manner. Therefore, detailed mechanistic understanding of G4s in the biological context remains to be deciphered. In clinics, the use of G4s as therapeutic targets has been hindered due to the low selectivity profile and poor drug-like properties of G4 ligands. Future research on G4s may overcome current methodological and interventional limitations and shed light on these unique structural elements in the pathogenesis and treatment of diseases.
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Affiliation(s)
- Victoria Sanchez-Martin
- Andalusian Center of Molecular Biology and Regenerative Medicine (CABIMER), Universidad de Sevilla-Spanish National Research Council (CSIC), Seville, Spain
- Departament of Genetics, University of Seville, Seville, Spain
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7
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Sridharan V, George T, Conroy DW, Shaffer Z, Surewicz WK, Jaroniec CP. Copper binding alters the core structure of amyloid fibrils formed by Y145Stop human prion protein. Phys Chem Chem Phys 2024; 26:26489-26496. [PMID: 39392708 PMCID: PMC11469299 DOI: 10.1039/d4cp03593c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2024] [Accepted: 10/08/2024] [Indexed: 10/13/2024]
Abstract
Transmissible spongiform encephalopathies (or prion diseases) such as Creutzfeldt-Jacob disease, mad cow disease, and scrapie are characterized by accumulation in the brain of misfolded prion protein aggregates (PrPSc) that have properties of amyloid fibrils. Given that transition metal ions, such as copper and zinc, appear to be important for physiological functions of cellular PrP (PrPC) as well as for prion disease pathogenesis, exploring their role in the protein aggregation process is of considerable interest. Copper(II) in particular is well-known to bind to the four tandem octapeptide repeats (PHGGGWGQ) located in the N-terminal region of PrP (human PrP amino acids 60-91), as well as to additional histidine binding sites outside the octarepeat region with distinct binding modes depending on Cu2+ concentration. Here, using the Y145Stop human prion protein variant (huPrP23-144) as a model and a combination of multidimensional solution and solid-state NMR spectroscopy, atomic force microscopy and thioflavin T fluorescence assays we probed the binding of Cu2+ to monomeric huPrP23-144 and the impact of this binding on fibril assembly kinetics and their structural properties. Remarkably, we found that fibrils formed by huPrP23-144 containing one molar equivalent of bound Cu2+ adopt a core structure that is distinct from that found for huPrP23-144 in the absence of Cu2+ but, instead, corresponds to a conformational strain formed by huPrP23-144 containing the A117V mutation. A similar huPrP23-144 A117V-like amyloid core structure was adopted by a Cu2+-bound Δ51-91 huPrP23-144 deletion variant lacking the entire octarepeat region, suggesting that Cu2+ binding to His residues 96, 111 and 140 located near the C-terminus of huPrP23-144 is primarily responsible for the observed change in fibril conformation, potentially due to partial structuring of the intrinsically disordered huPrP23-144 by the bound Cu2+ during the fibril assembly process. We also found that fibrils formed by Cu2+-bound huPrP23-144 adopt the native huPrP23-144-like rather than A117V-like structure when the fibrillization reaction is seeded with pre-formed huPrP23-144 amyloid.
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Affiliation(s)
| | - Tara George
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA.
| | - Daniel W Conroy
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA.
| | - Zach Shaffer
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA.
| | - Witold K Surewicz
- Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, OH, USA
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8
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Roterman I, Slupina M, Stapor K, Konieczny L, Gądek K, Nowakowski P. Chameleon Sequences-Structural Effects in Proteins Characterized by Hydrophobicity Disorder. ACS OMEGA 2024; 9:38506-38522. [PMID: 39310170 PMCID: PMC11411663 DOI: 10.1021/acsomega.4c03658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 08/20/2024] [Accepted: 08/23/2024] [Indexed: 09/25/2024]
Abstract
Repeated protein folding processes both in vivo and in vitro leading to the same structure for a specific amino acid sequence prove that the amino acid sequence determines protein structuring. This is also evidenced by the variability of structuring, dependent on the introduced mutations. An important phenomenon in this regard is the presence of a differentiated secondary structure for chain fragments of identical sequence representing distinct forms of the secondary-order structure. Proteins termed chameleon proteins contain polypeptide chain fragments of identical sequence (length 6-12 aa) showing structural differentiation: helix versus β-structure. In the present paper, it was shown that these fragments represent components matching the structural status dictated by the physicochemical properties of the entire structural unit. This structural matching is related to achieving the goal of the biological function of the structural unit. The corresponding secondary structure represents a means to achieving this goal, not an end in itself. A selected set of proteins from the ChSeq database have been analyzed using a fuzzy oil drop model (FOD-M) identifying the uniqueness of the hydrophobicity distribution taken as a medium for recording the specificity of a given protein and a given chameleon section in particular. It was shown that in the vast majority, the status of chameleon sections turns out to be comparable regardless of the represented secondary structure.
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Affiliation(s)
- Irena Roterman
- Department
of Bioinformatics and Telemedicine, Jagiellonian
University—Medical College, Medyczna 7, 30-688 Krakow, Poland
| | - Mateusz Slupina
- ALSTOM
ZWUS Sp. z o.o., Modelarska
12, 40-142 Katowice, Poland
| | - Katarzyna Stapor
- Faculty
of Automatic, Electronics and Computer Science, Department of Applied
Informatics, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland
| | - Leszek Konieczny
- Chair
of Medical Biochemistry, Jagiellonian University—Medical
College, Kopernika 7, 31-034 Krakow, Poland
| | - Krzysztof Gądek
- AGH
Cyfronet, SANO SCIENCE, Nawojki 11, 30-950 Kraków, Poland
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Liu C, Wu K, Choi H, Han H, Zhang X, Watson JL, Shijo S, Bera AK, Kang A, Brackenbrough E, Coventry B, Hick DR, Hoofnagle AN, Zhu P, Li X, Decarreau J, Gerben SR, Yang W, Wang X, Lamp M, Murray A, Bauer M, Baker D. Diffusing protein binders to intrinsically disordered proteins. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.16.603789. [PMID: 39071267 PMCID: PMC11275890 DOI: 10.1101/2024.07.16.603789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
Proteins which bind intrinsically disordered proteins (IDPs) and intrinsically disordered regions (IDRs) with high affinity and specificity could have considerable utility for therapeutic and diagnostic applications. However, a general methodology for targeting IDPs/IDRs has yet to be developed. Here, we show that starting only from the target sequence of the input, and freely sampling both target and binding protein conformation, RFdiffusion can generate binders to IDPs and IDRs in a wide range of conformations. We use this approach to generate binders to the IDPs Amylin, C-peptide and VP48 in a range of conformations with Kds in the 3 -100nM range. The Amylin binder inhibits amyloid fibril formation and dissociates existing fibers, and enables enrichment of amylin for mass spectrometry-based detection. For the IDRs G3bp1, common gamma chain (IL2RG) and prion, we diffused binders to beta strand conformations of the targets, obtaining 10 to 100 nM affinity. The IL2RG binder colocalizes with the receptor in cells, enabling new approaches to modulating IL2 signaling. Our approach should be widely useful for creating binders to flexible IDPs/IDRs spanning a wide range of intrinsic conformational preferences.
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Affiliation(s)
- Caixuan Liu
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Kejia Wu
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
- Biological Physics, Structure and Design Graduate Program, University of Washington, Seattle, WA, USA
| | - Hojun Choi
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Hannah Han
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Xulie Zhang
- Key Laboratory of Epigenetic Regulation and Intervention, Institute of Biophysics, Chinese Academy of Sciences Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Joseph L Watson
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Sara Shijo
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, 98105, USA
| | - Asim K Bera
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Alex Kang
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Evans Brackenbrough
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Brian Coventry
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Derrick R Hick
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Andrew N Hoofnagle
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, 98105, USA
| | - Ping Zhu
- Key Laboratory of Epigenetic Regulation and Intervention, Institute of Biophysics, Chinese Academy of Sciences Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xingting Li
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Justin Decarreau
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Stacey R Gerben
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Wei Yang
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Xinru Wang
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Mila Lamp
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Analisa Murray
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Magnus Bauer
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - David Baker
- Department of Biochemistry, University of Washington, Seattle, WA, USA
- Institute for Protein Design, University of Washington, Seattle, WA, USA
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10
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Wongchitrat P, Chanmee T, Govitrapong P. Molecular Mechanisms Associated with Neurodegeneration of Neurotropic Viral Infection. Mol Neurobiol 2024; 61:2881-2903. [PMID: 37946006 PMCID: PMC11043213 DOI: 10.1007/s12035-023-03761-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 10/31/2023] [Indexed: 11/12/2023]
Abstract
Viral infections of the central nervous system (CNS) cause variable outcomes from acute to severe neurological sequelae with increased morbidity and mortality. Viral neuroinvasion directly or indirectly induces encephalitis via dysregulation of the immune response and contributes to the alteration of neuronal function and the degeneration of neuronal cells. This review provides an overview of the cellular and molecular mechanisms of virus-induced neurodegeneration. Neurotropic viral infections influence many aspects of neuronal dysfunction, including promoting chronic inflammation, inducing cellular oxidative stress, impairing mitophagy, encountering mitochondrial dynamics, enhancing metabolic rewiring, altering neurotransmitter systems, and inducing misfolded and aggregated pathological proteins associated with neurodegenerative diseases. These pathogenetic mechanisms create a multidimensional injury of the brain that leads to specific neuronal and brain dysfunction. The understanding of the molecular mechanisms underlying the neurophathogenesis associated with neurodegeneration of viral infection may emphasize the strategies for prevention, protection, and treatment of virus infection of the CNS.
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Affiliation(s)
- Prapimpun Wongchitrat
- Center for Research Innovation and Biomedical Informatics, Faculty of Medical Technology, Mahidol University, 999 Phutthamonthon 4 Road, Salaya, Phutthamonthon, Nakhon Pathom, 73170, Thailand.
| | - Theerawut Chanmee
- Department of Clinical Chemistry, Faculty of Medical Technology, Mahidol University, Salaya, Nakhon Pathom, Thailand
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11
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Denouel A, Brandel JP, Peckeu-Abboud L, Seilhean D, Bouaziz-Amar E, Quadrio I, Oudart JB, Lehmann S, Bellecave P, Laplanche JL, Haik S. Prospective 25-year surveillance of prion diseases in France, 1992 to 2016: a slow waning of epidemics and an increase in observed sporadic forms. Euro Surveill 2023; 28:2300101. [PMID: 38099349 PMCID: PMC10831413 DOI: 10.2807/1560-7917.es.2023.28.50.2300101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 06/01/2023] [Indexed: 12/17/2023] Open
Abstract
BackgroundPrion diseases are rare, fatal disorders that have repeatedly raised public health concerns since the early 1990s. An active prion disease surveillance network providing national level data was implemented in France in 1992.AimWe aimed to describe the epidemiology of sporadic, genetic and infectious forms of prion diseases in France since surveillance implementation.MethodsWe included all suspected cases notified from January 1992 to December 2016, and cases who died during the period with a definite or probable prion disease diagnosis according to EuroCJD criteria. Demographic, clinical, genetic, neuropathological and biochemical data were collected.ResultsIn total, 25,676 suspected cases were notified and 2,907 were diagnosed as prion diseases, including 2,510 (86%) with sporadic Creutzfeldt-Jakob disease (sCJD), 240 (8%) genetic and 157 (6%) with infectious prion disease. Suspected cases and sCJD cases increased over time. Younger sCJD patients (≤ 50 years) showed phenotypes related to a distinct molecular subtype distribution vs those above 50 years. Compared to other European countries, France has had a higher number of cases with iatrogenic CJD after growth hormone treatment and variant CJD (vCJD) linked to bovine spongiform encephalopathy (second after the United Kingdom), but numbers slowly decreased over time.ConclusionWe observed a decrease of CJD infectious forms, demonstrating the effectiveness of measures to limit human exposure to exogenous prions. However, active surveillance is needed regarding uncertainties about future occurrences of vCJD, possible zoonotic potential of chronic wasting diseases in cervids and increasing trends of sCJD observed in France and other countries.
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Affiliation(s)
- Angéline Denouel
- Paris Brain Institute (Institut du Cerveau, ICM), INSERM, CNRS, Assistance Publique-Hôpitaux de Paris (AP-HP), Sorbonne Université, Paris, France
| | - Jean-Philippe Brandel
- Paris Brain Institute (Institut du Cerveau, ICM), INSERM, CNRS, Assistance Publique-Hôpitaux de Paris (AP-HP), Sorbonne Université, Paris, France
- Assistance Publique-Hôpitaux de Paris (AP-HP), Cellule nationale de référence des Maladies de Creutzfeldt-Jakob, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Laurène Peckeu-Abboud
- Department of Clinical Sciences, Clinical Immunology Unit, Institute of Tropical Medicine, Antwerp, Belgium
| | - Danielle Seilhean
- Paris Brain Institute (Institut du Cerveau, ICM), INSERM, CNRS, Assistance Publique-Hôpitaux de Paris (AP-HP), Sorbonne Université, Paris, France
| | - Elodie Bouaziz-Amar
- Département de Biochimie et Biologie Moléculaire, Hôpitaux Lariboisière-Fernand Widal, Paris, France
- INSERM, UMR 1144, 'Optimisation Thérapeutique en Neuropsychopharmacologie', Paris, France
| | - Isabelle Quadrio
- Neurochemistry and Neurogenetics Unit, Department of Biochemistry and Molecular Biology, Lyon University Hospital, Bron, France
- CNRS UMR5292, INSERM U1028, University of Lyon 1, BioRan, Lyon, Paris
| | - Jean-Baptiste Oudart
- CHU Reims, Pôle de Biologie, Service de Biochimie - Pharmacologie - Toxicologie, Reims, France
- Université de Reims Champagne-Ardenne, SFR CAP-Santé (FED 4231), Laboratoire de Biochimie Médicale et Biologie Moléculaire, Reims, France
- CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire - MEDyC, Reims, France
| | - Sylvain Lehmann
- Université de Montpellier, IRMB, INM, INSERM, CHU de Montpellier, Laboratoire Biochimie-Protéomique clinique, Montpellier, France
| | | | - Jean-Louis Laplanche
- Département de Biochimie et Biologie Moléculaire, Hôpitaux Lariboisière-Fernand Widal, Paris, France
- INSERM, UMR 1144, 'Optimisation Thérapeutique en Neuropsychopharmacologie', Paris, France
| | - Stéphane Haik
- Paris Brain Institute (Institut du Cerveau, ICM), INSERM, CNRS, Assistance Publique-Hôpitaux de Paris (AP-HP), Sorbonne Université, Paris, France
- Assistance Publique-Hôpitaux de Paris (AP-HP), Cellule nationale de référence des Maladies de Creutzfeldt-Jakob, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
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Concha-Marambio L, Wang F, Armijo E, Gorski D, Ramirez F, Scowcroft A, Pritzkow S, Soto C. Development of a methodology for large-scale production of prions for biological and structural studies. Front Mol Biosci 2023; 10:1184029. [PMID: 37635939 PMCID: PMC10449461 DOI: 10.3389/fmolb.2023.1184029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 07/31/2023] [Indexed: 08/29/2023] Open
Abstract
Prion diseases are a group of infectious neurodegenerative diseases produced by the conversion of the normal prion protein (PrPC) into the disease-associated form (PrPSc). Extensive evidence indicate that the main or sole component of the infectious agent is PrPSc, which can replicate in affected individuals in the absence of nucleic acids. However, the mechanism of PrPC-to-PrPSc conversion remains elusive, which has been attributed to the lack of sufficient structural information of infectious PrPSc and a reliable system to study prion replication in vitro. In this article we adapted the Protein Misfolding Cyclic Amplification (PMCA) technology for rapid and efficient generation of highly infectious prions in large-scale. Murine prions of the RML strain were efficiently propagated in volumes up to 1,000-fold larger than conventional PMCA. The large-scale PMCA (LS-PMCA) procedure enabled to produce highly infectious prions, which maintain the strain properties of the seed used to begin the reaction. LS-PMCA was shown to work with various species and strains of prions, including mouse RML and 301C strains, hamster Hyper prion, cervid CWD prions, including a rare Norwegian CWD prion, and human CJD prions. We further improved the LS-PMCA into a bioreactor format that can operate under industry-mimicking conditions for continuous and unlimited production of PrPSc without the need to keep adding brain-derived prions. In our estimation, this bioreactor can produce in 1d an amount of prions equivalent to that present in 25 infected animals at the terminal stage of the disease. Our LS-PMCA technology may provide a valuable tool to produce large quantities of well-defined and homogeneous infectious prions for biological and structural studies.
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Affiliation(s)
- Luis Concha-Marambio
- Department of Neurology, Mitchell Center for Alzheimer’s Disease and Related Brain Disorders, University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, United States
- Amprion Inc., San Diego, CA, United States
| | - Fei Wang
- Department of Neurology, Mitchell Center for Alzheimer’s Disease and Related Brain Disorders, University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, United States
| | - Enrique Armijo
- Department of Neurology, Mitchell Center for Alzheimer’s Disease and Related Brain Disorders, University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, United States
| | - Damian Gorski
- Department of Neurology, Mitchell Center for Alzheimer’s Disease and Related Brain Disorders, University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, United States
| | - Frank Ramirez
- Department of Neurology, Mitchell Center for Alzheimer’s Disease and Related Brain Disorders, University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, United States
| | - Andrew Scowcroft
- Department of Neurology, Mitchell Center for Alzheimer’s Disease and Related Brain Disorders, University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, United States
| | - Sandra Pritzkow
- Department of Neurology, Mitchell Center for Alzheimer’s Disease and Related Brain Disorders, University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, United States
| | - Claudio Soto
- Department of Neurology, Mitchell Center for Alzheimer’s Disease and Related Brain Disorders, University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, United States
- Amprion Inc., San Diego, CA, United States
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13
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Choi YG, Jang B, Park JH, Choi MW, Lee GY, Cho DJ, Kim HY, Lim HK, Lee WJ, Choi EK, Kim YS. Radotinib Decreases Prion Propagation and Prolongs Survival Times in Models of Prion Disease. Int J Mol Sci 2023; 24:12241. [PMID: 37569615 PMCID: PMC10419185 DOI: 10.3390/ijms241512241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/27/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023] Open
Abstract
The conversion of cellular prion protein (PrPC) into pathogenic prion isoforms (PrPSc) and the mutation of PRNP are definite causes of prion diseases. Unfortunately, without exception, prion diseases are untreatable and fatal neurodegenerative disorders; therefore, one area of research focuses on identifying medicines that can delay the progression of these diseases. According to the concept of drug repositioning, we investigated the efficacy of the c-Abl tyrosine kinase inhibitor radotinib, which is a drug that is approved for the treatment of chronic myeloid leukemia, in the treatment of disease progression in prion models, including prion-infected cell models, Tga20 and hamster cerebellar slice culture models, and 263K scrapie-infected hamster models. Radotinib inhibited PrPSc deposition in neuronal ZW13-2 cells that were infected with the 22L or 139A scrapie strains and in cerebellar slice cultures that were infected with the 22L or 263K scrapie strains. Interestingly, hamsters that were intraperitoneally injected with the 263K scrapie strain and intragastrically treated with radotinib (100 mg/kg) exhibited prolonged survival times (159 ± 28.6 days) compared to nontreated hamsters (135 ± 9.9 days) as well as reduced PrPSc deposition and ameliorated pathology. However, intraperitoneal injection of radotinib exerted a smaller effect on the survival rate of the hamsters. Additionally, we found that different concentrations of radotinib (60, 100, and 200 mg/kg) had similar effects on survival time, but this effect was not observed after treatment with a low dose (30 mg/kg) of radotinib. Interestingly, when radotinib was administered 4 or 8 weeks after prion inoculation, the treated hamsters survived longer than the vehicle-treated hamsters. Additionally, a pharmacokinetic assay revealed that radotinib effectively crossed the blood-brain barrier. Based on our findings, we suggest that radotinib is a new candidate anti-prion drug that could possibly be used to treat prion diseases and promote the remission of symptoms.
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Affiliation(s)
- Yeong-Gon Choi
- Ilsong Institute of Life Science, Hallym University, Youngdeungpo-gu, Seoul 07247, Republic of Korea
| | - Byungki Jang
- Ilsong Institute of Life Science, Hallym University, Youngdeungpo-gu, Seoul 07247, Republic of Korea
| | - Jeong-Ho Park
- Ilsong Institute of Life Science, Hallym University, Youngdeungpo-gu, Seoul 07247, Republic of Korea
| | - Min-Woo Choi
- Ilsong Institute of Life Science, Hallym University, Youngdeungpo-gu, Seoul 07247, Republic of Korea
| | - Gong Yeal Lee
- Il Yang Pharm Co., Ltd., 37, Hagal-ro, 136beon-gil, Giheung-gu, Yongin-si 17096, Republic of Korea (H.Y.K.)
| | - Dae Jin Cho
- Il Yang Pharm Co., Ltd., 37, Hagal-ro, 136beon-gil, Giheung-gu, Yongin-si 17096, Republic of Korea (H.Y.K.)
| | - Hong Youp Kim
- Il Yang Pharm Co., Ltd., 37, Hagal-ro, 136beon-gil, Giheung-gu, Yongin-si 17096, Republic of Korea (H.Y.K.)
| | - Hae Kyoung Lim
- Il Yang Pharm Co., Ltd., 37, Hagal-ro, 136beon-gil, Giheung-gu, Yongin-si 17096, Republic of Korea (H.Y.K.)
| | - Won Jae Lee
- Il Yang Pharm Co., Ltd., 37, Hagal-ro, 136beon-gil, Giheung-gu, Yongin-si 17096, Republic of Korea (H.Y.K.)
| | - Eun-Kyoung Choi
- Ilsong Institute of Life Science, Hallym University, Youngdeungpo-gu, Seoul 07247, Republic of Korea
- Department of Biomedical Gerontology, Graduate School of Hallym University, Chuncheon 24252, Republic of Korea
| | - Yong-Sun Kim
- Ilsong Institute of Life Science, Hallym University, Youngdeungpo-gu, Seoul 07247, Republic of Korea
- Department of Microbiology, College of Medicine, Hallym University, Chuncheon 24252, Republic of Korea
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14
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Kang SG, Kim C, Aiken J, McKenzie D. Innate Immune Status of Glia Modulates Prion Propagation in Early Stage of Infection. Cells 2023; 12:1878. [PMID: 37508542 PMCID: PMC10378504 DOI: 10.3390/cells12141878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 07/11/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
Prion diseases are progressive neurodegenerative disorders affecting humans and various mammals. The prominent neuropathological change in prion-affected brains is neuroinflammation, histopathologically characterized by reactive gliosis surrounding prion deposition. The cause and effect of these cellular responses are still unclear. Here we investigate the impact of innate immune responses on prion replication using in vitro cell culture models. Hamster-adapted transmissible mink encephalopathy prions, hyper (HY) and drowsy (DY) strains, were assayed for accumulation of pathogenic prion protein (PrPSc) in primary glial cultures derived from 8-day-old hamster pups. The kinetics of PrPSc accumulation largely depended on prion strain and brain regions from where glial cells originated. Glial cells derived from the cerebellum were susceptible to HY, but resistant to DY strain as determined by western blot analysis, immunocytochemistry, and animal bioassay. Glial cells from the cerebral cortex were, however, refractory to both strains. PrPSc accumulation was affected by innate immune modulators. Priming glial cells with lipopolysaccharide decreased prion replication, whereas pre-treatment with dexamethasone, inhibiting innate immunity, increased susceptibility to DY infection. Our results suggest that neuroinflammation resulting from prion infection is a response to resolve and/or prevent prion propagation in the brain. It implies a therapeutic potential of innate immune modulation in the early stages of prion disease.
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Affiliation(s)
- Sang-Gyun Kang
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, AB T6G 2M8, Canada
- Department of Medicine, University of Alberta, Edmonton, AB T6G 2R7, Canada
| | - Chiye Kim
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, AB T6G 2M8, Canada
- Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2E9, Canada
| | - Judd Aiken
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, AB T6G 2M8, Canada
- Department of Agricultural, Food and Nutritional Sciences, University of Alberta, Edmonton, AB T6G 1C9, Canada
| | - Debbie McKenzie
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, AB T6G 2M8, Canada
- Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2E9, Canada
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15
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Denouel A, Brandel JP, Seilhean D, Laplanche JL, Elbaz A, Haik S. The role of environmental factors on sporadic Creutzfeldt-Jakob disease mortality: evidence from an age-period-cohort analysis. Eur J Epidemiol 2023:10.1007/s10654-023-01004-5. [PMID: 37191829 DOI: 10.1007/s10654-023-01004-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 04/06/2023] [Indexed: 05/17/2023]
Abstract
Sporadic Creutzfeldt-Jakob disease (sCJD) is the most common form of prion diseases. The causes of sCJD are still unknown and exogenous factors may play a role. Worldwide, the number of patients with sCJD has progressively increased over time. This increase can be partly explained by increasing life expectancy and better case ascertainment, but a true increase in the number of sCJD cases cannot be excluded. We estimated mortality rates from sCJD in France (1992-2016) and studied variation in mortality rates by age, period, and time.We included all cases aged 45-89 years old who died with a probable/definite sCJD diagnosis based on the French national surveillance network. We used age-period-cohort (APC) Poisson regression models to study variation in mortality rates by sex, age, period, and time.A total of 2475 sCJD cases aged 45-89 years were included. Mortality rates increased with age, reached a peak between 75 and 79 years, and decreased thereafter. Mortality rates were higher in women than men at younger ages and lower at older ages. The full APC model with a sex×age interaction provided the best fit to the data, thus in favour of sex, age, period, and cohort effects on mortality rates. In particular, mortality rates increased progressively with successive birth cohorts.Based on 25 years of active surveillance in France, we show evidence for sex, age, period, and cohort effects on sCJD mortality. The identification of cohort effects suggests that environmental exposures may play a role in sCJD etiology.
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Affiliation(s)
- Angéline Denouel
- CNRS UMR 7225, INSERM U1127, Paris Brain Institute, Sorbonne Universités, Paris, France.
| | - Jean-Philippe Brandel
- CNRS UMR 7225, INSERM U1127, Paris Brain Institute, Sorbonne Universités, Paris, France
- AP-HP, Centre National de Référence des Maladies de Creutzfeldt-Jakob, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Danielle Seilhean
- CNRS UMR 7225, INSERM U1127, Paris Brain Institute, Sorbonne Universités, Paris, France
| | - Jean-Louis Laplanche
- Département de Biochimie et Biologie Moléculaire, Hôpitaux Lariboisière-Fernand Widal, Paris, France
- INSERM, UMR 1144, "Optimisation Thérapeutique en Neuropsychopharmacologie", Paris, France
| | - Alexis Elbaz
- Université Paris-Saclay, UVSQ, Univ. Paris-Sud, Gustave Roussy, Inserm, U1018, Team « Exposome, Heredity, Cancer, and Health », CESP, Villejuif, 94807, France
| | - Stéphane Haik
- CNRS UMR 7225, INSERM U1127, Paris Brain Institute, Sorbonne Universités, Paris, France
- AP-HP, Centre National de Référence des Maladies de Creutzfeldt-Jakob, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
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16
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Cortez LM, Morrison AJ, Garen CR, Patterson S, Uyesugi T, Petrosyan R, Sekar RV, Harms MJ, Woodside MT, Sim VL. Probing the origin of prion protein misfolding via reconstruction of ancestral proteins. Protein Sci 2022; 31:e4477. [PMID: 36254680 PMCID: PMC9667828 DOI: 10.1002/pro.4477] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 10/11/2022] [Accepted: 10/13/2022] [Indexed: 12/13/2022]
Abstract
Prion diseases are fatal neurodegenerative diseases caused by pathogenic misfolding of the prion protein, PrP. They are transmissible between hosts, and sometimes between different species, as with transmission of bovine spongiform encephalopathy to humans. Although PrP is found in a wide range of vertebrates, prion diseases are seen only in certain mammals, suggesting that infectious misfolding was a recent evolutionary development. To explore when PrP acquired the ability to misfold infectiously, we reconstructed the sequences of ancestral versions of PrP from the last common primate, primate-rodent, artiodactyl, placental, bird, and amniote. Recombinant ancestral PrPs were then tested for their ability to form β-sheet aggregates, either spontaneously or when seeded with infectious prion strains from human, cervid, or rodent species. The ability to aggregate developed after the oldest ancestor (last common amniote), and aggregation capabilities diverged along evolutionary pathways consistent with modern-day susceptibilities. Ancestral bird PrP could not be seeded with modern-day prions, just as modern-day birds are resistant to prion disease. Computational modeling of structures suggested that differences in helix 2 could account for the resistance of ancestral bird PrP to seeding. Interestingly, ancestral primate PrP could be converted by all prion seeds, including both human and cervid prions, raising the possibility that species descended from an ancestral primate have retained the susceptibility to conversion by cervid prions. More generally, the results suggest that susceptibility to prion disease emerged prior to ~100 million years ago, with placental mammals possibly being generally susceptible to disease.
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Affiliation(s)
- Leonardo M. Cortez
- Centre for Prions and Protein Folding DiseasesUniversity of AlbertaEdmontonAlbertaCanada
- Division of Neurology, Department of MedicineUniversity of AlbertaEdmontonAlbertaCanada
- Neuroscience and Mental Health InstituteUniversity of AlbertaEdmontonAlbertaCanada
| | - Anneliese J. Morrison
- Institute of Molecular BiologyUniversity of OregonEugeneOregonUSA
- Department of Chemistry and BiochemistryUniversity of OregonEugeneOregonUSA
| | - Craig R. Garen
- Department of PhysicsUniversity of AlbertaEdmontonAlbertaCanada
| | - Sawyer Patterson
- Centre for Prions and Protein Folding DiseasesUniversity of AlbertaEdmontonAlbertaCanada
| | - Toshi Uyesugi
- Department of PhysicsUniversity of AlbertaEdmontonAlbertaCanada
| | - Rafayel Petrosyan
- Department of PhysicsUniversity of AlbertaEdmontonAlbertaCanada
- Present address:
Zaven & Sonia Akian College of Science and EngineeringAmerican University of ArmeniaYerevanArmenia
| | | | - Michael J. Harms
- Institute of Molecular BiologyUniversity of OregonEugeneOregonUSA
- Department of Chemistry and BiochemistryUniversity of OregonEugeneOregonUSA
| | - Michael T. Woodside
- Centre for Prions and Protein Folding DiseasesUniversity of AlbertaEdmontonAlbertaCanada
- Department of PhysicsUniversity of AlbertaEdmontonAlbertaCanada
- Li Ka Shing Institute of VirologyUniversity of AlbertaEdmontonAlbertaCanada
| | - Valerie L. Sim
- Centre for Prions and Protein Folding DiseasesUniversity of AlbertaEdmontonAlbertaCanada
- Division of Neurology, Department of MedicineUniversity of AlbertaEdmontonAlbertaCanada
- Neuroscience and Mental Health InstituteUniversity of AlbertaEdmontonAlbertaCanada
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17
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Gamez N, Bravo-Alegria J, Huang Y, Perez-Urrutia N, Dongarwar D, Soto C, Morales R. Altering Brain Amyloidosis by Intra-Lingual and Extra-Nasal Exposure of Aβ Aggregates. Cells 2022; 11:3442. [PMID: 36359840 PMCID: PMC9654398 DOI: 10.3390/cells11213442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/21/2022] [Accepted: 10/26/2022] [Indexed: 10/13/2023] Open
Abstract
Extensive experimental and human-derived evidence suggest that misfolded Aβ particles spread similarly to infectious prions. Moreover, peripheral administration of Aβ seeds accelerates brain amyloidosis in both susceptible experimental animals and humans. The mechanisms and elements governing the transport of misfolded Aβ from the periphery to the brain are not fully understood, although circulation and retrograde axonal transport have been proposed. Here, we demonstrate that injection of Aβ seeds in the tongue, a highly innervated organ, substantially accelerates the appearance of plaques in Tg2576 mice. In addition, the extra-nasal exposure of Aβ aggregates increased amyloid pathology in the olfactory bulb. Our results show that exposing highly innervated tissues to Aβ seeds accelerates AD-like pathological features, and suggest that Aβ seeds can be transported from peripheral compartments to the brain by retrograde axonal transport. Research in this direction may be relevant on different fronts, including disease mechanisms, diagnosis, and risk-evaluation of potential iatrogenic transmission of Aβ misfolding.
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Affiliation(s)
- Nazaret Gamez
- Department of Neurology, The University of Texas Health Science Center at Houston, 6431 Fannin St., Houston, TX 77030, USA
- Dpto. Biología Celular, Genética y Fisiología, Instituto de Investigación Biomédica de Málaga-IBIMA, Facultad de Ciencias, Universidad of Malaga, 29010 Malaga, Spain
| | - Javiera Bravo-Alegria
- Department of Neurology, The University of Texas Health Science Center at Houston, 6431 Fannin St., Houston, TX 77030, USA
- Universidad de los Andes, Facultad de Medicina, Av. San Carlos de Apoquindo 2200, Las Condes, Santiago 7620001, Chile
| | - Yumeng Huang
- Department of Neurology, The University of Texas Health Science Center at Houston, 6431 Fannin St., Houston, TX 77030, USA
| | - Nelson Perez-Urrutia
- Department of Neurology, The University of Texas Health Science Center at Houston, 6431 Fannin St., Houston, TX 77030, USA
- Facultad de Ciencias de la Salud, Universidad San Sebastian, Lientur 1456, Concepcion 4080871, Chile
| | - Deepa Dongarwar
- Department of Neurology, The University of Texas Health Science Center at Houston, 6431 Fannin St., Houston, TX 77030, USA
| | - Claudio Soto
- Department of Neurology, The University of Texas Health Science Center at Houston, 6431 Fannin St., Houston, TX 77030, USA
| | - Rodrigo Morales
- Department of Neurology, The University of Texas Health Science Center at Houston, 6431 Fannin St., Houston, TX 77030, USA
- Centro Integrativo de Biologia y Quimica Aplicada (CIBQA), Universidad Bernardo O’Higgins, Santiago 8370993, Chile
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Cellular Prion Protein Expression in the Brain Tissue from Brucella ceti-Infected Striped Dolphins (Stenella coeruleoalba). Animals (Basel) 2022; 12:ani12101304. [PMID: 35625150 PMCID: PMC9137499 DOI: 10.3390/ani12101304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 05/09/2022] [Accepted: 05/17/2022] [Indexed: 12/04/2022] Open
Abstract
Simple Summary Brucella ceti, a zoonotic bacterial pathogen, is known to exhibit a strong neurotropism and neuropathogenicity for striped dolphins (Stenella coeruleoalba), often leading to their stranding and death. Given the lack of information on B. ceti infection’s neuropathogenesis, we investigated, for the first time, cellular prion protein (PrPc) expression in the brain tissue from B. ceti-infected, neurobrucellosis-affected striped dolphins. Our study was inspired by previous work, reporting PrPc as the host cell receptor for B. abortus on the surface of murine macrophages. Immunohistochemistry (IHC) and Western blot (WB) analyses were carried out on brain tissues from 12 striped dolphins found stranded along the coasts of Italy (11 specimens) and the Canary Islands (one individual), five of which served as negative controls. While PrPc IHC yielded inconclusive results, WB analyses showed a clear-cut PrPc expression, albeit of different intensity, in the brain tissue of all the herein investigated, B. ceti-infected and neurobrucellosis-affected individuals. In this respect, the aforementioned PrPc expression patterns could be influenced by a number of intrinsic host-related factors, as well as by several extrinsic factors including simultaneously occurring neuropathies and/or coinfections by other neurotropic pathogens. Additionally, an upregulation of PrPc mRNA in the brain tissue of striped dolphins could be also hypothesized during the different stages of B. ceti infection, in a similar fashion to what is already shown in murine bone marrow cells challenged with Escherichia coli. In conclusion, much more work is needed in order to properly assess the role of PrPc, if any, as a host cell receptor for B. ceti in striped dolphins. Abstract Brucella ceti, a zoonotic pathogen of major concern to cetacean health and conservation, is responsible for severe meningo-encephalitic/myelitic lesions in striped dolphins (Stenella coeruleoalba), often leading to their stranding and death. This study investigated, for the first time, the cellular prion protein (PrPc) expression in the brain tissue from B. ceti-infected, neurobrucellosis-affected striped dolphins. Seven B. ceti-infected, neurobrucellosis-affected striped dolphins, found stranded along the Italian coastline (6) and in the Canary Islands (1), were investigated, along with five B. ceti-uninfected striped dolphins from the coast of Italy, carrying no brain lesions, which served as negative controls. Western Blot (WB) and immunohistochemistry (IHC) with an anti-PrP murine monoclonal antibody were carried out on the brain parenchyma of these dolphins. While PrPc IHC yielded inconclusive results, a clear-cut PrPc expression of different intensity was found by means of WB analyses in the brain tissue of all the seven herein investigated, B. ceti-infected and neurobrucellosis-affected cetacean specimens, with two dolphins stranded along the Italian coastline and one dolphin beached in Canary Islands also exhibiting a statistically significant increase in cerebral PrPc expression as compared to the five Brucella spp.-negative control specimens. The significantly increased PrPc expression found in three out of seven B. ceti-infected, neurobrucellosis-affected striped dolphins does not allow us to draw any firm conclusion(s) about the putative role of PrPc as a host cell receptor for B. ceti. Should this be the case, an upregulation of PrPc mRNA in the brain tissue of neurobrucellosis-affected striped dolphins could be hypothesized during the different stages of B. ceti infection, as previously shown in murine bone marrow cells challenged with Escherichia coli. Noteworthy, the inflammatory infiltrates seen in the brain and in the cervico-thoracic spinal cord segments from the herein investigated, B. ceti-infected and neurobrucellosis-affected striped dolphins were densely populated by macrophage/histiocyte cells, often harboring Brucella spp. antigen in their cytoplasm, similarly to what was reported in macrophages from mice experimentally challenged with B. abortus. Notwithstanding the above, much more work is needed in order to properly assess the role of PrPc, if any, as a host cell receptor for B. ceti in striped dolphins.
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19
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Synthetic Sulfated Polymers Control Amyloid Aggregation of Ovine Prion Protein and Decrease Its Toxicity. Polymers (Basel) 2022; 14:polym14071478. [PMID: 35406350 PMCID: PMC9002794 DOI: 10.3390/polym14071478] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 03/31/2022] [Accepted: 04/04/2022] [Indexed: 12/30/2022] Open
Abstract
Amyloid aggregation, including aggregation and propagation of prion protein, is a key factor in numerous human diseases, so-called amyloidosis, with a very poor ability for treatment or prevention. The present work describes the effect of sulfated or sulfonated polymers (sodium dextran sulfate, polystyrene sulfonate, polyanethole sulfonate, and polyvinyl sulfate) on different stages of amyloidogenic conversion and aggregation of the prion protein, which is associated with prionopathies in humans and animals. All tested polymers turned out to induce amyloid conversion of the ovine prion protein. As suggested from molecular dynamics simulations, this effect probably arises from destabilization of the native prion protein structure by the polymers. Short polymers enhanced its further aggregation, whereas addition of high-molecular poly(styrene sulfonate) inhibited amyloid fibrils formation. According to the seeding experiments, the protein–polymer complexes formed after incubation with poly(styrene sulfonate) exhibited significantly lower amyloidogenic capacity compared with the control fibrils of the free prion protein. The cytotoxicity of soluble oligomers was completely inhibited by treatment with poly(styrene sulfonate). To summarize, sulfonated polymers are a promising platform for the formulation of a new class of anti-prion and anti-amyloidosis therapeutics.
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20
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Holz CL, Darish JR, Straka K, Grosjean N, Bolin S, Kiupel M, Sreevatsan S. Evaluation of Real-Time Quaking-Induced Conversion, ELISA, and Immunohistochemistry for Chronic Wasting Disease Diagnosis. Front Vet Sci 2022; 8:824815. [PMID: 35118153 PMCID: PMC8803730 DOI: 10.3389/fvets.2021.824815] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 12/22/2021] [Indexed: 11/13/2022] Open
Abstract
Chronic wasting disease (CWD) is a transmissible prion disorder, primarily affecting free-ranging and captive cervids in North America (United States and Canada), South Korea, and Europe (Finland, Norway, and Sweden). Current diagnostic methods used in the United States for detection of CWD in hunter harvested deer involve demonstration of the causal misfolded prion protein (PrPCWD) in the obex or retropharyngeal lymph nodes (RLNs) using an antigen detection ELISA as a screening tool, followed by a confirmation by the gold standard method, immunohistochemistry (IHC). Real-time quaking-induced conversion (RT-QuIC) assay is a newer approach that amplifies misfolded CWD prions in vitro and has facilitated CWD prion detection in a variety of tissues, body fluids, and excreta. The current study was undertaken to compare ELISA, IHC, and RT-QuIC on RLNs (n = 1,300 animals) from white-tailed deer (WTD) in Michigan. In addition, prescapular, prefemoral and popliteal lymph nodes collected from a small subset (n = 7) of animals were tested. Lastly, the location of the positive samples within Michigan was documented and the percentage of CWD positive RLNs was calculated by sex and age. ELISA and RT-QuIC detected PrPCWD in 184 and 178 out of 1,300 RLNs, respectively. Of the 184 ELISA positive samples, 176 were also IHC positive for CWD. There were seven discordant results when comparing IHC and ELISA. RT-QuIC revealed that six of the seven samples matched the IHC outcomes. One RLN was negative by IHC, but positive by ELISA and RT-QuIC. RT-QuIC, IHC, and ELISA also detected PrPCWD in prescapular, prefemoral and popliteal lymph nodes. CWD infection heterogeneities were observed in different age and sex groups, with young males having higher CWD prevalence. All, except one, CWD positive RLNs analyzed were from ten Counties geographically located in the West Michigan region of the Lower Peninsula. Taken together, we show evidence that the RT-QuIC assay is comparable to ELISA and IHC and could be helpful for routine CWD detection in surveillance programs. RT-QuIC also demonstrated that CWD prions are distributed across lymph nodes in a variety of anatomic locations. A multi-laboratory validation on blinded sample panels is underway and is likely to help to provide insight into the variability (lab-to-lab), analytical sensitivity, and specificity of gold standard diagnostics vs. RT-QuIC assay.
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Affiliation(s)
- Carine L Holz
- Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, MI, United States
| | - Joseph R Darish
- Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, MI, United States
| | - Kelly Straka
- Michigan Department of Natural Resources, Lansing, MI, United States
| | - Nicole Grosjean
- Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, MI, United States
| | - Steven Bolin
- Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, MI, United States
| | - Matti Kiupel
- Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, MI, United States
| | - Srinand Sreevatsan
- Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, MI, United States
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21
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Patel H, Martinez P, Perkins A, Taylor X, Jury N, McKinzie D, Lasagna-Reeves CA. Pathological tau and reactive astrogliosis are associated with distinct functional deficits in a mouse model of tauopathy. Neurobiol Aging 2022; 109:52-63. [PMID: 34655981 PMCID: PMC8671336 DOI: 10.1016/j.neurobiolaging.2021.09.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 08/12/2021] [Accepted: 09/05/2021] [Indexed: 01/03/2023]
Abstract
Pathological aggregation of tau and neuroinflammatory changes mark the clinical course of Alzheimer's disease and related tauopathies. To understand the correlation between these pathological hallmarks and functional deficits, we assessed behavioral and physiological deficits in the PS19 mouse model, a broadly utilized model of tauopathy. At 9 months, PS19 mice have characteristic hyperactive behavior, a decline in motor strength, and deterioration in physiological conditions marked by lower body temperature, reduced body weight, and an increase in measures of frailty. Correlation of these deficits with different pathological hallmarks revealed that pathological tau species, characterized by soluble p-tau species, and tau seeding bioactivity correlated with impairment in grip strength and thermal regulation. On the other hand, astrocyte reactivity showed a positive correlation with the hyperactive behavior of the PS19 mice. These results suggest that a diverse spectrum of soluble pathological tau species could be responsible for different symptoms and that neuroinflammation could contribute to functional deficits independently from tau pathology. These observations enhance the necessity of a multi-targeted approach for the treatment of neurodegenerative tauopathies.
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Affiliation(s)
- Henika Patel
- Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, 46202, USA,Department of Anatomy, Cell Biology & Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Pablo Martinez
- Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, 46202, USA,Department of Anatomy, Cell Biology & Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Abigail Perkins
- Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, 46202, USA,Department of Anatomy, Cell Biology & Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Xavier Taylor
- Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, 46202, USA,Department of Anatomy, Cell Biology & Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Nur Jury
- Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, 46202, USA,Department of Anatomy, Cell Biology & Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - David McKinzie
- Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, 46202, USA,Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Cristian A. Lasagna-Reeves
- Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, 46202, USA,Department of Anatomy, Cell Biology & Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA,Center for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA,Corresponding author: Cristian A. Lasagna-Reeves, Ph.D., Indiana University School of Medicine, The Stark Neurosciences Research Institute, Neurosciences Research Building 214G, 320 West 15th Street, Indianapolis, IN, 46202, Office: (317) 274-7830,
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22
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Prion Protein Biology Through the Lens of Liquid-Liquid Phase Separation. J Mol Biol 2021; 434:167368. [PMID: 34808226 DOI: 10.1016/j.jmb.2021.167368] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 11/12/2021] [Accepted: 11/14/2021] [Indexed: 12/29/2022]
Abstract
Conformational conversion of the α-helix-rich cellular prion protein into the misfolded, β-rich, aggregated, scrapie form underlies the molecular basis of prion diseases that represent a class of invariably fatal, untreatable, and transmissible neurodegenerative diseases. However, despite the extensive and rigorous research, there is a significant gap in the understanding of molecular mechanisms that contribute to prion pathogenesis. In this review, we describe the historical perspective of the development of the prion concept and the current state of knowledge of prion biology including structural, molecular, and cellular aspects of the prion protein. We then summarize the putative functional role of the N-terminal intrinsically disordered segment of the prion protein. We next describe the ongoing efforts in elucidating the prion phase behavior and the emerging role of liquid-liquid phase separation that can have potential functional relevance and can offer an alternate non-canonical pathway involving conformational conversion into a disease-associated form. We also attempt to shed light on the evolutionary perspective of the prion protein highlighting the potential role of intrinsic disorder in prion protein biology and summarize a few important questions associated with the phase transitions of the prion protein. Delving deeper into these key aspects can pave the way for a detailed understanding of the critical molecular determinants of the prion phase transition and its relevance to physiology and neurodegenerative diseases.
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23
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Chafin TK, Douglas MR, Martin BT, Zbinden ZD, Middaugh CR, Ballard JR, Gray MC, Don White, Douglas ME. Age structuring and spatial heterogeneity in prion protein gene ( PRNP) polymorphism in white-tailed deer. Prion 2021; 14:238-248. [PMID: 33078661 PMCID: PMC7575228 DOI: 10.1080/19336896.2020.1832947] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Chronic-wasting disease (CWD) is a prion-derived fatal neurodegenerative disease that has affected wild cervid populations on a global scale. Susceptibility has been linked unambiguously to several amino acid variants within the prion protein gene (PRNP). Quantifying their distribution across landscapes can provide critical information for agencies attempting to adaptively manage CWD. Here we attempt to further define management implications of PRNP polymorphism by quantifying the contemporary geographic distribution (i.e., phylogeography) of PRNP variants in hunter-harvested white-tailed deer (WTD; Odocoileus virginianus, N = 1433) distributed across Arkansas (USA), including a focal spot for CWD since detection of the disease in February 2016. Of these, PRNP variants associated with the well-characterized 96S non-synonymous substitution showed a significant increase in relative frequency among older CWD-positive cohorts. We interpreted this pattern as reflective of a longer life expectancy for 96S genotypes in a CWD-endemic region, suggesting either decreased probabilities of infection or reduced disease progression. Other variants showing statistical signatures of potential increased susceptibility, however, seemingly reflect an artefact of population structure. We also showed marked heterogeneity across the landscape in the prevalence of ‘reduced susceptibility’ genotypes. This may indicate, in turn, that differences in disease susceptibility among WTD in Arkansas are an innate, population-level characteristic that is detectable through phylogeographic analysis.
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Affiliation(s)
- Tyler K Chafin
- Department of Biological Sciences, University of Arkansas , Fayetteville, AR, USA
| | - Marlis R Douglas
- Department of Biological Sciences, University of Arkansas , Fayetteville, AR, USA
| | - Bradley T Martin
- Department of Biological Sciences, University of Arkansas , Fayetteville, AR, USA
| | - Zachery D Zbinden
- Department of Biological Sciences, University of Arkansas , Fayetteville, AR, USA
| | - Christopher R Middaugh
- Arkansas Game and Fish Commission, Research, Evaluation, and Compliance Division , Little Rock, AR, USA
| | - Jennifer R Ballard
- Arkansas Game and Fish Commission, Research, Evaluation, and Compliance Division , Little Rock, AR, USA
| | - M Cory Gray
- Arkansas Game and Fish Commission, Research, Evaluation, and Compliance Division , Little Rock, AR, USA
| | - Don White
- University of Arkansas Agricultural Experiment Station , Monticello, AR, USA
| | - Michael E Douglas
- Department of Biological Sciences, University of Arkansas , Fayetteville, AR, USA
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Lakkaraju AKK, Frontzek K, Lemes E, Herrmann U, Losa M, Marpakwar R, Aguzzi A. Loss of PIKfyve drives the spongiform degeneration in prion diseases. EMBO Mol Med 2021; 13:e14714. [PMID: 34291577 PMCID: PMC8518562 DOI: 10.15252/emmm.202114714] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 06/23/2021] [Accepted: 06/25/2021] [Indexed: 11/21/2022] Open
Abstract
Brain‐matter vacuolation is a defining trait of all prion diseases, yet its cause is unknown. Here, we report that prion infection and prion‐mimetic antibodies deplete the phosphoinositide kinase PIKfyve—which controls endolysosomal maturation—from mouse brains, cultured cells, organotypic brain slices, and brains of Creutzfeldt‐Jakob disease victims. We found that PIKfyve is acylated by the acyltransferases zDHHC9 and zDHHC21, whose juxtavesicular topology is disturbed by prion infection, resulting in PIKfyve deacylation and rapid degradation, as well as endolysosomal hypertrophy and activation of TFEB‐dependent lysosomal enzymes. A protracted unfolded protein response (UPR), typical of prion diseases, also induced PIKfyve deacylation and degradation. Conversely, UPR antagonists restored PIKfyve levels in prion‐infected cells. Overexpression of zDHHC9 and zDHHC21, administration of the antiprion polythiophene LIN5044, or supplementation with the PIKfyve reaction product PI(3,5)P2 suppressed prion‐induced vacuolation and restored lysosomal homeostasis. Thus, PIKfyve emerges as a central mediator of vacuolation and neurotoxicity in prion diseases.
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Affiliation(s)
| | - Karl Frontzek
- Institute of Neuropathology, University of Zurich, Zürich, Switzerland
| | - Emina Lemes
- Institute of Neuropathology, University of Zurich, Zürich, Switzerland
| | - Uli Herrmann
- Institute of Neuropathology, University of Zurich, Zürich, Switzerland
| | - Marco Losa
- Institute of Neuropathology, University of Zurich, Zürich, Switzerland
| | | | - Adriano Aguzzi
- Institute of Neuropathology, University of Zurich, Zürich, Switzerland
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25
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Kamali-Jamil R, Vázquez-Fernández E, Tancowny B, Rathod V, Amidian S, Wang X, Tang X, Fang A, Senatore A, Hornemann S, Dudas S, Aguzzi A, Young HS, Wille H. The ultrastructure of infectious L-type bovine spongiform encephalopathy prions constrains molecular models. PLoS Pathog 2021; 17:e1009628. [PMID: 34061899 PMCID: PMC8195424 DOI: 10.1371/journal.ppat.1009628] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 06/11/2021] [Accepted: 05/10/2021] [Indexed: 11/18/2022] Open
Abstract
Bovine spongiform encephalopathy (BSE) is a prion disease of cattle that is caused by the misfolding of the cellular prion protein (PrPC) into an infectious conformation (PrPSc). PrPC is a predominantly α-helical membrane protein that misfolds into a β-sheet rich, infectious state, which has a high propensity to self-assemble into amyloid fibrils. Three strains of BSE prions can cause prion disease in cattle, including classical BSE (C-type) and two atypical strains, named L-type and H-type BSE. To date, there is no detailed information available about the structure of any of the infectious BSE prion strains. In this study, we purified L-type BSE prions from transgenic mouse brains and investigated their biochemical and ultrastructural characteristics using electron microscopy, image processing, and immunogold labeling techniques. By using phosphotungstate anions (PTA) to precipitate PrPSc combined with sucrose gradient centrifugation, a high yield of proteinase K-resistant BSE amyloid fibrils was obtained. A morphological examination using electron microscopy, two-dimensional class averages, and three-dimensional reconstructions revealed two structural classes of L-type BSE amyloid fibrils; fibrils that consisted of two protofilaments with a central gap and an average width of 22.5 nm and one-protofilament fibrils that were 10.6 nm wide. The one-protofilament fibrils were found to be more abundant compared to the thicker two-protofilament fibrils. Both fibrillar assemblies were successfully decorated with monoclonal antibodies against N- and C-terminal epitopes of PrP using immunogold-labeling techniques, confirming the presence of polypeptides that span residues 100-110 to 227-237. The fact that the one-protofilament fibrils contain both N- and C-terminal PrP epitopes constrains molecular models for the structure of the infectious conformer in favour of a compact four-rung β-solenoid fold.
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Affiliation(s)
- Razieh Kamali-Jamil
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada
| | - Ester Vázquez-Fernández
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada
| | - Brian Tancowny
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada
| | - Vineet Rathod
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada
| | - Sara Amidian
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada
| | - Xiongyao Wang
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada
| | - Xinli Tang
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada
| | - Andrew Fang
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada
| | - Assunta Senatore
- Institute of Neuropathology, University of Zürich, Zürich, Switzerland
| | - Simone Hornemann
- Institute of Neuropathology, University of Zürich, Zürich, Switzerland
| | - Sandor Dudas
- Canadian BSE Reference Laboratory, Canadian Food Inspection Agency, Lethbridge Laboratory, Lethbridge, Alberta, Canada
| | - Adriano Aguzzi
- Institute of Neuropathology, University of Zürich, Zürich, Switzerland
| | - Howard S. Young
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Holger Wille
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Alberta, Canada
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Alberta, Canada
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26
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Zhan W, Muhuri M, Tai PWL, Gao G. Vectored Immunotherapeutics for Infectious Diseases: Can rAAVs Be The Game Changers for Fighting Transmissible Pathogens? Front Immunol 2021; 12:673699. [PMID: 34046041 PMCID: PMC8144494 DOI: 10.3389/fimmu.2021.673699] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 04/23/2021] [Indexed: 01/08/2023] Open
Abstract
Conventional vaccinations and immunotherapies have encountered major roadblocks in preventing infectious diseases like HIV, influenza, and malaria. These challenges are due to the high genomic variation and immunomodulatory mechanisms inherent to these diseases. Passive transfer of broadly neutralizing antibodies may offer partial protection, but these treatments require repeated dosing. Some recombinant viral vectors, such as those based on lentiviruses and adeno-associated viruses (AAVs), can confer long-term transgene expression in the host after a single dose. Particularly, recombinant (r)AAVs have emerged as favorable vectors, given their high in vivo transduction efficiency, proven clinical efficacy, and low immunogenicity profiles. Hence, rAAVs are being explored to deliver recombinant antibodies to confer immunity against infections or to diminish the severity of disease. When used as a vaccination vector for the delivery of antigens, rAAVs enable de novo synthesis of foreign proteins with the conformation and topology that resemble those of natural pathogens. However, technical hurdles like pre-existing immunity to the rAAV capsid and production of anti-drug antibodies can reduce the efficacy of rAAV-vectored immunotherapies. This review summarizes rAAV-based prophylactic and therapeutic strategies developed against infectious diseases that are currently being tested in pre-clinical and clinical studies. Technical challenges and potential solutions will also be discussed.
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Affiliation(s)
- Wei Zhan
- Horae Gene Therapy Center, University of Massachusetts Medical School, Worcester, MA, United States
- VIDE Program, University of Massachusetts Medical School, Worcester, MA, United States
| | - Manish Muhuri
- Horae Gene Therapy Center, University of Massachusetts Medical School, Worcester, MA, United States
- VIDE Program, University of Massachusetts Medical School, Worcester, MA, United States
- Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, MA, United States
| | - Phillip W. L. Tai
- Horae Gene Therapy Center, University of Massachusetts Medical School, Worcester, MA, United States
- VIDE Program, University of Massachusetts Medical School, Worcester, MA, United States
- Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, MA, United States
| | - Guangping Gao
- Horae Gene Therapy Center, University of Massachusetts Medical School, Worcester, MA, United States
- VIDE Program, University of Massachusetts Medical School, Worcester, MA, United States
- Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, MA, United States
- Li Weibo Institute for Rare Diseases Research, University of Massachusetts Medical School, Worcester, MA, United States
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27
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Booth CJ, Lichtenberg SS, Chappell RJ, Pedersen JA. Chemical Inactivation of Prions Is Altered by Binding to the Soil Mineral Montmorillonite. ACS Infect Dis 2021; 7:859-870. [PMID: 33787209 DOI: 10.1021/acsinfecdis.0c00860] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Environmental routes of transmission contribute to the spread of the prion diseases chronic wasting disease of deer and elk and scrapie of sheep and goats. Prions can persist in soils and other environmental matrices and remain infectious for years. Prions bind avidly to the common soil mineral montmorillonite, and such binding can dramatically increase oral disease transmission. Decontamination of soil in captive facilities and natural habitats requires inactivation agents that are effective when prions are bound to soil microparticles. Here, we investigate the inactivation of free and montmorillonite-bound prions with sodium hydroxide, acidic pH, Environ LpH, and sodium hypochlorite. Immunoblotting and bioassays confirm that sodium hydroxide and sodium hypochlorite are effective for prion deactivation, although montmorillonite appears to reduce the efficacy of hypochlorite. Acidic conditions slightly reduce prion infectivity, and the acidic phenolic disinfectant Environ LpH produces slight reductions in infectivity and immunoreactivity. The extent to which the association with montmorillonite protects prions from chemical inactivation appears influenced by the effect of chemical agents on the clay structure and surface pH. When clay morphology remains relatively unaltered, as when exposed to hypochlorite, montmorillonite-bound prions appear to be protected from inactivation. In contrast, when the clay structure is substantially transformed, as when exposed to high concentrations of sodium hydroxide, the attachment to montmorillonite does not slow degradation. A reduction in surface pH appears to cause slight disruptions in clay structure, which enhances degradation under these conditions. We expect our findings will aid the development of remediation approaches for successful decontamination of prion-contaminated sites.
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Affiliation(s)
- Clarissa J. Booth
- Molecular and Environmental Toxicology Center, University of Wisconsin, Madison, Wisconsin 53706, United States
| | | | - Richard J. Chappell
- Department of Biostatistics & Medical Informatics and Department of Statistics, University of Wisconsin, Madison, Wisconsin 53706, United States
| | - Joel A. Pedersen
- Molecular and Environmental Toxicology Center, University of Wisconsin, Madison, Wisconsin 53706, United States
- Department of Soil Science, University of Wisconsin, Madison, Wisconsin 53706, United States
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28
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Chen C, Dong X. Therapeutic implications of prion diseases. BIOSAFETY AND HEALTH 2021. [DOI: 10.1016/j.bsheal.2020.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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29
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Zhang Y, Zhang M, Liu Y, Zhang D, Tang Y, Ren B, Zheng J. Dual amyloid cross-seeding reveals steric zipper-facilitated fibrillization and pathological links between protein misfolding diseases. J Mater Chem B 2021; 9:3300-3316. [PMID: 33651875 DOI: 10.1039/d0tb02958k] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Amyloid cross-seeding, as a result of direct interaction and co-aggregation between different disease-causative peptides, is considered as a main mechanism for the spread of the overlapping pathology across different cells and tissues between different protein-misfolding diseases (PMDs). Despite the biomedical significance of amyloid cross-seeding in amyloidogenesis, it remains a great challenge to discover amyloid cross-seeding systems and reveal their cross-seeding structures and mechanisms. Herein, we are the first to report that GNNQQNY - a short fragment from yeast prion protein Sup35 - can cross-seed with both amyloid-β (Aβ, associated with Alzheimer's disease) and human islet amyloid polypeptide (hIAPP, associated with type II diabetes) to form β-structure-rich assemblies and to accelerate amyloid fibrillization. Dry, steric β-zippers, formed by the two β-sheets of different amyloid peptides, provide generally interactive and structural motifs to facilitate amyloid cross-seeding. The presence of different steric β-zippers in a variety of GNNQQNY-Aβ and GNNQQNY-hIAPP assemblies also explains amyloid polymorphism. In addition, alteration of steric zipper formation by single-point mutations of GNNQQNY and interactions of GNNQQNY with different Aβ and hIAPP seeds leads to different amyloid cross-seeding efficiencies, further confirming the existence of cross-seeding barriers. This work offers a better structural-based understanding of amyloid cross-seeding mechanisms linked to different PMDs.
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Affiliation(s)
- Yanxian Zhang
- Department of Chemical, Biomolecular, and Corrosion Engineering The University of Akron, Ohio, USA.
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30
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Wang LJ, Gu XD, Li XX, Shen L, Ji HF. Comparative analysis of heparin affecting the biochemical properties of chicken and murine prion proteins. PLoS One 2021; 16:e0247248. [PMID: 33600459 PMCID: PMC7891698 DOI: 10.1371/journal.pone.0247248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Accepted: 02/03/2021] [Indexed: 11/19/2022] Open
Abstract
The conversion of cellular prion protein (PrPC) to disease-provoking conformer (PrPSc) is crucial in the pathogenesis of prion diseases. Heparin has been shown to enhance mammalian prion protein misfolding. As spontaneous prion disease has not been reported in non-mammalian species, such as chicken, it is interesting to explore the influence of heparin on the conversion of chicken prion protein (ChPrP). Herein, we investigated the influences of heparin on biochemical properties of full-length recombinant ChPrP, with murine prion protein (MoPrP) as control. The results showed that at low heparin concentration (10 μg/mL), a great loss of solubility was observed for both MoPrP and ChPrP using solubility assays. In contrast, when the concentration of heparin was high (30 μg/mL), the solubility of MoPrP and ChPrP both decreased slightly. Using circular dichroism, PK digestion and transmission electron microscopy, significantly increased β-sheet content, PK resistance and size of aggregates were observed for MoPrP interacted with 30 μg/mL heparin, whereas 30 μg/mL heparin-treated ChPrP showed less PK resistance and slight increase of β-sheet structure. Therefore, heparin can induce conformational changes in both MoPrP and ChPrP and the biochemical properties of the aggregates induced by heparin could be modified by heparin concentration. These results highlight the importance of concentration of cofactors affecting PrP misfolding.
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Affiliation(s)
- Li-Juan Wang
- Institute of Biomedical Research, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
- Shandong Provincial Research Center for Bioinformatic Engineering and Technique, Zibo Key Laboratory of New Drug Development of Neurodegenerative Diseases, School of Life Sciences, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
- * E-mail: (LJW); (LS); (HFJ)
| | - Xiao-Dan Gu
- Institute of Biomedical Research, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
- Shandong Provincial Research Center for Bioinformatic Engineering and Technique, Zibo Key Laboratory of New Drug Development of Neurodegenerative Diseases, School of Life Sciences, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
| | - Xiao-Xiao Li
- Institute of Biomedical Research, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
- Shandong Provincial Research Center for Bioinformatic Engineering and Technique, Zibo Key Laboratory of New Drug Development of Neurodegenerative Diseases, School of Life Sciences, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
| | - Liang Shen
- Institute of Biomedical Research, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
- Shandong Provincial Research Center for Bioinformatic Engineering and Technique, Zibo Key Laboratory of New Drug Development of Neurodegenerative Diseases, School of Life Sciences, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
- * E-mail: (LJW); (LS); (HFJ)
| | - Hong-Fang Ji
- Institute of Biomedical Research, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
- Shandong Provincial Research Center for Bioinformatic Engineering and Technique, Zibo Key Laboratory of New Drug Development of Neurodegenerative Diseases, School of Life Sciences, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
- * E-mail: (LJW); (LS); (HFJ)
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Evidence for aggregation-independent, PrP C-mediated Aβ cellular internalization. Proc Natl Acad Sci U S A 2020; 117:28625-28631. [PMID: 33139554 DOI: 10.1073/pnas.2009238117] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Evidence linking amyloid beta (Aβ) cellular uptake and toxicity has burgeoned, and mechanisms underlying this association are subjects of active research. Two major, interconnected questions are whether Aβ uptake is aggregation-dependent and whether it is sequence-specific. We recently reported that the neuronal uptake of Aβ depends significantly on peptide chirality, suggesting that the process is predominantly receptor-mediated. Over the past decade, the cellular prion protein (PrPC) has emerged as an important mediator of Aβ-induced toxicity and of neuronal Aβ internalization. Here, we report that the soluble, nonfibrillizing Aβ (1-30) peptide recapitulates full-length Aβ stereoselective cellular uptake, allowing us to decouple aggregation from cellular, receptor-mediated internalization. Moreover, we found that Aβ (1-30) uptake is also dependent on PrPC expression. NMR-based molecular-level characterization identified the docking site on PrPC that underlies the stereoselective binding of Aβ (1-30). Our findings therefore identify a specific sequence within Aβ that is responsible for the recognition of the peptide by PrPC, as well as PrPC-dependent cellular uptake. Further uptake stereodifferentiation in PrPC-free cells points toward additional receptor-mediated interactions as likely contributors for Aβ cellular internalization. Taken together, our results highlight the potential of targeting cellular surface receptors to inhibit Aβ cellular uptake as an alternative route for future therapeutic development for Alzheimer's disease.
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Muronetz VI, Barinova K, Kudryavtseva S, Medvedeva M, Melnikova A, Sevostyanova I, Semenyuk P, Stroylova Y, Sova M. Natural and Synthetic Derivatives of Hydroxycinnamic Acid Modulating the Pathological Transformation of Amyloidogenic Proteins. Molecules 2020; 25:E4647. [PMID: 33053854 PMCID: PMC7594092 DOI: 10.3390/molecules25204647] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 10/08/2020] [Accepted: 10/09/2020] [Indexed: 02/06/2023] Open
Abstract
This review presents the main properties of hydroxycinnamic acid (HCA) derivatives and their potential application as agents for the prevention and treatment of neurodegenerative diseases. It is partially focused on the successful use of these compounds as inhibitors of amyloidogenic transformation of proteins. Firstly, the prerequisites for the emergence of interest in HCA derivatives, including natural compounds, are described. A separate section is devoted to synthesis and properties of HCA derivatives. Then, the results of molecular modeling of HCA derivatives with prion protein as well as with α-synuclein fibrils are summarized, followed by detailed analysis of the experiments on the effect of natural and synthetic HCA derivatives, as well as structurally similar phenylacetic and benzoic acid derivatives, on the pathological transformation of prion protein and α-synuclein. The ability of HCA derivatives to prevent amyloid transformation of some amyloidogenic proteins, and their presence not only in food products but also as natural metabolites in human blood and tissues, makes them promising for the prevention and treatment of neurodegenerative diseases of amyloid nature.
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Affiliation(s)
- Vladimir I. Muronetz
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia; (K.B.); (A.M.); (I.S.); (P.S.); (Y.S.)
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, 119234 Moscow, Russia; (S.K.); (M.M.)
| | - Kseniya Barinova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia; (K.B.); (A.M.); (I.S.); (P.S.); (Y.S.)
| | - Sofia Kudryavtseva
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, 119234 Moscow, Russia; (S.K.); (M.M.)
| | - Maria Medvedeva
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, 119234 Moscow, Russia; (S.K.); (M.M.)
| | - Aleksandra Melnikova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia; (K.B.); (A.M.); (I.S.); (P.S.); (Y.S.)
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, 119234 Moscow, Russia; (S.K.); (M.M.)
| | - Irina Sevostyanova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia; (K.B.); (A.M.); (I.S.); (P.S.); (Y.S.)
| | - Pavel Semenyuk
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia; (K.B.); (A.M.); (I.S.); (P.S.); (Y.S.)
| | - Yulia Stroylova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia; (K.B.); (A.M.); (I.S.); (P.S.); (Y.S.)
- Institute of Molecular Medicine, Sechenov First Moscow State Medical University Trubetskaya St. 8, Bldg. 2, 119991 Moscow, Russia
| | - Matej Sova
- Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000 Ljubljana, Slovenia;
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Mantuano E, Azmoon P, Banki MA, Lam MS, Sigurdson CJ, Gonias SL. A soluble derivative of PrP C activates cell-signaling and regulates cell physiology through LRP1 and the NMDA receptor. J Biol Chem 2020; 295:14178-14188. [PMID: 32788217 DOI: 10.1074/jbc.ra120.013779] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 08/04/2020] [Indexed: 11/06/2022] Open
Abstract
Cellular prion protein (PrPC) is a widely expressed glycosylphosphatidylinositol-anchored membrane protein. Scrapie prion protein is a misfolded and aggregated form of PrPC responsible for prion-induced neurodegenerative diseases. Understanding the function of the nonpathogenic PrPC monomer is an important objective. PrPC may be shed from the cell surface to generate soluble derivatives. Herein, we studied a recombinant derivative of PrPC (soluble cellular prion protein, S-PrP) that corresponds closely in sequence to a soluble form of PrPC shed from the cell surface by proteases in the A Disintegrin And Metalloprotease (ADAM) family. S-PrP activated cell-signaling in PC12 and N2a cells. TrkA was transactivated by Src family kinases and extracellular signal-regulated kinase 1/2 was activated downstream of Trk receptors. These cell-signaling events were dependent on the N-methyl-d-aspartate receptor (NMDA-R) and low-density lipoprotein receptor-related protein-1 (LRP1), which functioned as a cell-signaling receptor system in lipid rafts. Membrane-anchored PrPC and neural cell adhesion molecule were not required for S-PrP-initiated cell-signaling. S-PrP promoted PC12 cell neurite outgrowth. This response required the NMDA-R, LRP1, Src family kinases, and Trk receptors. In Schwann cells, S-PrP interacted with the LRP1/NMDA-R system to activate extracellular signal-regulated kinase 1/2 and promote cell migration. The effects of S-PrP on PC12 cell neurite outgrowth and Schwann cell migration were similar to those caused by other proteins that engage the LRP1/NMDA-R system, including activated α2-macroglobulin and tissue-type plasminogen activator. Collectively, these results demonstrate that shed forms of PrPC may exhibit important biological activities in the central nervous system and the peripheral nervous system by serving as ligands for the LRP1/NMDA-R system.
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Affiliation(s)
- Elisabetta Mantuano
- Department of Pathology, University of California San Diego, La Jolla, California, USA
| | - Pardis Azmoon
- Department of Pathology, University of California San Diego, La Jolla, California, USA
| | - Michael A Banki
- Department of Pathology, University of California San Diego, La Jolla, California, USA
| | - Michael S Lam
- Department of Pathology, University of California San Diego, La Jolla, California, USA
| | - Christina J Sigurdson
- Department of Pathology, University of California San Diego, La Jolla, California, USA
| | - Steven L Gonias
- Department of Pathology, University of California San Diego, La Jolla, California, USA
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34
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Transcriptional signature of prion-induced neurotoxicity in a Drosophila model of transmissible mammalian prion disease. Biochem J 2020; 477:833-852. [PMID: 32108870 PMCID: PMC7054746 DOI: 10.1042/bcj20190872] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 01/14/2020] [Accepted: 01/31/2020] [Indexed: 12/11/2022]
Abstract
Prion diseases are fatal transmissible neurodegenerative conditions of humans and animals that arise through neurotoxicity induced by PrP misfolding. The cellular and molecular mechanisms of prion-induced neurotoxicity remain undefined. Understanding these processes will underpin therapeutic and control strategies for human and animal prion diseases, respectively. Prion diseases are difficult to study in their natural hosts and require the use of tractable animal models. Here we used RNA-Seq-based transcriptome analysis of prion-exposed Drosophila to probe the mechanism of prion-induced neurotoxicity. Adult Drosophila transgenic for pan neuronal expression of ovine PrP targeted to the plasma membrane exhibit a neurotoxic phenotype evidenced by decreased locomotor activity after exposure to ovine prions at the larval stage. Pathway analysis and quantitative PCR of genes differentially expressed in prion-infected Drosophila revealed up-regulation of cell cycle activity and DNA damage response, followed by down-regulation of eIF2 and mTOR signalling. Mitochondrial dysfunction was identified as the principal toxicity pathway in prion-exposed PrP transgenic Drosophila. The transcriptomic changes we observed were specific to PrP targeted to the plasma membrane since these prion-induced gene expression changes were not evident in similarly treated Drosophila transgenic for cytosolic pan neuronal PrP expression, or in non-transgenic control flies. Collectively, our data indicate that aberrant cell cycle activity, repression of protein synthesis and altered mitochondrial function are key events involved in prion-induced neurotoxicity, and correlate with those identified in mammalian hosts undergoing prion disease. These studies highlight the use of PrP transgenic Drosophila as a genetically well-defined tractable host to study mammalian prion biology.
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35
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Tau Protein as a New Regulator of Cellular Prion Protein Transcription. Mol Neurobiol 2020; 57:4170-4186. [PMID: 32683652 DOI: 10.1007/s12035-020-02025-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 07/14/2020] [Indexed: 12/15/2022]
Abstract
Cellular prion protein (PrPC) is largely responsible for transmissible spongiform encephalopathies (TSEs) when it becomes the abnormally processed and protease resistant form PrPSC. Physiological functions of PrPC include protective roles against oxidative stress and excitotoxicity. Relevantly, PrPC downregulates tau levels, whose accumulation and modification are a hallmark in the advance of Alzheimer's disease (AD). In addition to the accumulation of misfolded proteins, in the initial stages of AD-affected brains display both increased reactive oxygen species (ROS) markers and levels of PrPC. However, the factors responsible for the upregulation of PrPC are unknown. Thus, the aim of this study was to uncover the different molecular actors promoting PrPC overexpression. In order to mimic early stages of AD, we used β-amyloid-derived diffusible ligands (ADDLs) and tau cellular treatments, as well as ROS generation, to elucidate their particular roles in human PRNP promoter activity. In addition, we used specific chemical inhibitors and site-specific mutations of the PRNP promoter sequence to analyze the contribution of the main transcription factors involved in PRNP transcription under the analyzed conditions. Our results revealed that tau is a new modulator of PrPC expression independently of ADDL treatment and ROS levels. Lastly, we discovered that the JNK/c-jun-AP-1 pathway is involved in increased PRNP transcription activity by tau but not in the promoter response to ROS.
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36
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Tahir W, Abdulrahman B, Abdelaziz DH, Thapa S, Walia R, Schätzl HM. An astrocyte cell line that differentially propagates murine prions. J Biol Chem 2020; 295:11572-11583. [PMID: 32561641 PMCID: PMC7450132 DOI: 10.1074/jbc.ra120.012596] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 06/08/2020] [Indexed: 01/09/2023] Open
Abstract
Prion diseases are fatal infectious neurodegenerative disorders in human and animals caused by misfolding of the cellular prion protein (PrPC) into the pathological isoform PrPSc. Elucidating the molecular and cellular mechanisms underlying prion propagation may help to develop disease interventions. Cell culture systems for prion propagation have greatly advanced molecular insights into prion biology, but translation of in vitro to in vivo findings is often disappointing. A wider range of cell culture systems might help overcome these shortcomings. Here, we describe an immortalized mouse neuronal astrocyte cell line (C8D1A) that can be infected with murine prions. Both PrPC protein and mRNA levels in astrocytes were comparable with those in neuronal and non-neuronal cell lines permitting persistent prion infection. We challenged astrocytes with three mouse-adapted prion strains (22L, RML, and ME7) and cultured them for six passages. Immunoblotting results revealed that the astrocytes propagated 22L prions well over all six passages, whereas ME7 prions did not replicate, and RML prions replicated only very weakly after five passages. Immunofluorescence analysis indicated similar results for PrPSc. Interestingly, when we used prion conversion activity as a readout in real-time quaking-induced conversion assays with RML-infected cell lysates, we observed a strong signal over all six passages, comparable with that for 22L-infected cells. These data indicate that the C8D1A cell line is permissive to prion infection. Moreover, the propagated prions differed in conversion and proteinase K–resistance levels in these astrocytes. We propose that the C8D1A cell line could be used to decipher prion strain biology.
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Affiliation(s)
- Waqas Tahir
- Department of Comparative Biology & Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada.,Calgary Prion Research Unit, University of Calgary, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
| | - Basant Abdulrahman
- Department of Comparative Biology & Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada.,Calgary Prion Research Unit, University of Calgary, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada.,Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Dalia H Abdelaziz
- Department of Comparative Biology & Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada.,Calgary Prion Research Unit, University of Calgary, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada.,Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Simrika Thapa
- Department of Comparative Biology & Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada.,Calgary Prion Research Unit, University of Calgary, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
| | - Rupali Walia
- Department of Comparative Biology & Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada.,Calgary Prion Research Unit, University of Calgary, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
| | - Hermann M Schätzl
- Department of Comparative Biology & Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada .,Calgary Prion Research Unit, University of Calgary, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
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37
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Jang B, Kim M, Lee Y, Ishigami A, Kim Y, Choi E. Vimentin citrullination probed by a novel monoclonal antibody serves as a specific indicator for reactive astrocytes in neurodegeneration. Neuropathol Appl Neurobiol 2020; 46:751-769. [DOI: 10.1111/nan.12620] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 03/23/2020] [Indexed: 01/11/2023]
Affiliation(s)
- B. Jang
- Ilsong Institute of Life Science Hallym University Anyang Gyeonggi‐doRepublic of Korea
| | - M.J. Kim
- Ilsong Institute of Life Science Hallym University Anyang Gyeonggi‐doRepublic of Korea
- Department of Biomedical Gerontology Graduate School of Hallym University Chuncheon Gangwon‐do Republic of Korea
| | - Y.J. Lee
- Ilsong Institute of Life Science Hallym University Anyang Gyeonggi‐doRepublic of Korea
| | - A. Ishigami
- Molecular Regulation of Aging Tokyo Metropolitan Institute of Gerontology Itabashi‐ku Tokyo Japan
| | - Y.S. Kim
- Ilsong Institute of Life Science Hallym University Anyang Gyeonggi‐doRepublic of Korea
- Department of Microbiology College of Medicine Hallym University Chuncheon Gangwon‐do Republic of Korea
| | - E.K. Choi
- Ilsong Institute of Life Science Hallym University Anyang Gyeonggi‐doRepublic of Korea
- Department of Biomedical Gerontology Graduate School of Hallym University Chuncheon Gangwon‐do Republic of Korea
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38
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Peduzzo A, Linse S, Buell AK. The Properties of α-Synuclein Secondary Nuclei Are Dominated by the Solution Conditions Rather than the Seed Fibril Strain. ACS Chem Neurosci 2020; 11:909-918. [PMID: 32069013 DOI: 10.1021/acschemneuro.9b00594] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Amyloid fibrils of α-synuclein (α-syn) are a component of Lewy bodies, the characteristic hallmark of Parkinson's disease. Amyloid fibrils arise through primary nucleation from monomers, which in the case of α-syn is often heterogeneous, followed by the growth of the nuclei by monomer addition. Secondary nucleation corresponds to the formation of new fibrils facilitated by pre-existing fibrils. While it is well-established that the newly added monomer in fibril elongation adopts the conformation of the monomers in the seed ("templating"), it is unclear whether fibrils formed through secondary nucleation of monomers on the surface of seed fibrils copy the structure of the "parent" fibril. Here we show by biochemical and microscopical methods that the secondary nucleation of α-syn, enabled at mildly acidic pH, leads to fibrils that structurally resemble more closely those formed de novo under the same conditions, rather than the seeds if these are formed under different solution conditions. This result has important implications for the mechanistic understanding of the secondary nucleation of amyloid fibrils and its role in the propagation of aggregate pathology in protein misfolding diseases.
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Affiliation(s)
- Alessia Peduzzo
- Institute of Physical Biology, Heinrich-Heine University, 40225 Düsseldorf, Germany
| | - Sara Linse
- Department of Biochemistry and Structural Biology, Centre for Molecular Protein Science, Lund University, SE-221 00 Lund, Sweden
| | - Alexander K. Buell
- Institute of Physical Biology, Heinrich-Heine University, 40225 Düsseldorf, Germany
- Technical University of Denmark, Department of Biotechnology and Biomedicine, 2800 Lyngby, Denmark
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39
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Gavín R, Lidón L, Ferrer I, del Río JA. The Quest for Cellular Prion Protein Functions in the Aged and Neurodegenerating Brain. Cells 2020; 9:cells9030591. [PMID: 32131451 PMCID: PMC7140396 DOI: 10.3390/cells9030591] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 02/21/2020] [Accepted: 02/27/2020] [Indexed: 12/19/2022] Open
Abstract
Cellular (also termed ‘natural’) prion protein has been extensively studied for many years for its pathogenic role in prionopathies after misfolding. However, neuroprotective properties of the protein have been demonstrated under various scenarios. In this line, the involvement of the cellular prion protein in neurodegenerative diseases other than prionopathies continues to be widely debated by the scientific community. In fact, studies on knock-out mice show a vast range of physiological functions for the protein that can be supported by its ability as a cell surface scaffold protein. In this review, we first summarize the most commonly described roles of cellular prion protein in neuroprotection, including antioxidant and antiapoptotic activities and modulation of glutamate receptors. Second, in light of recently described interaction between cellular prion protein and some amyloid misfolded proteins, we will also discuss the molecular mechanisms potentially involved in protection against neurodegeneration in pathologies such as Alzheimer’s, Parkinson’s, and Huntington’s diseases.
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Affiliation(s)
- Rosalina Gavín
- Molecular and Cellular Neurobiotechnology, Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Science Park of Barcelona, 08028 Barcelona, Spain; (L.L.); (J.A.d.R.)
- Department of Cell Biology, Physiology and Immunology, Faculty of Biology, University of Barcelona, 08028 Barcelona, Spain
- Center for Networked Biomedical Research on Neurodegenerative Diseases (Ciberned), 28031 Barcelona, Spain;
- Institute of Neuroscience, University of Barcelona, 08028 Barcelona, Spain
- Correspondence: ; Tel.: +34-93-4031185
| | - Laia Lidón
- Molecular and Cellular Neurobiotechnology, Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Science Park of Barcelona, 08028 Barcelona, Spain; (L.L.); (J.A.d.R.)
- Department of Cell Biology, Physiology and Immunology, Faculty of Biology, University of Barcelona, 08028 Barcelona, Spain
- Center for Networked Biomedical Research on Neurodegenerative Diseases (Ciberned), 28031 Barcelona, Spain;
- Institute of Neuroscience, University of Barcelona, 08028 Barcelona, Spain
| | - Isidre Ferrer
- Center for Networked Biomedical Research on Neurodegenerative Diseases (Ciberned), 28031 Barcelona, Spain;
- Institute of Neuroscience, University of Barcelona, 08028 Barcelona, Spain
- Department of Pathology and Experimental Therapeutics, University of Barcelona, 08907 Barcelona, Spain
- Senior Consultant, Bellvitge University Hospital, Hospitalet de Llobregat, 08907 Barcelona, Spain
- Bellvitge Biomedical Research Institute (IDIBELL), Hospitalet de Llobregat, 08908 Barcelona, Spain
| | - José Antonio del Río
- Molecular and Cellular Neurobiotechnology, Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Science Park of Barcelona, 08028 Barcelona, Spain; (L.L.); (J.A.d.R.)
- Department of Cell Biology, Physiology and Immunology, Faculty of Biology, University of Barcelona, 08028 Barcelona, Spain
- Center for Networked Biomedical Research on Neurodegenerative Diseases (Ciberned), 28031 Barcelona, Spain;
- Institute of Neuroscience, University of Barcelona, 08028 Barcelona, Spain
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Pradhan P, Srivastava A, Singh J, Biswas B, Saini A, Siddique I, Kumari P, Khan MA, Mishra A, Yadav PK, Kumar S, Bhavesh NS, Venkatraman P, Vivekanandan P, Kundu B. Prion protein transcription is auto-regulated through dynamic interactions with G-quadruplex motifs in its own promoter. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2020; 1863:194479. [PMID: 31931179 DOI: 10.1016/j.bbagrm.2019.194479] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 12/26/2019] [Accepted: 12/28/2019] [Indexed: 11/19/2022]
Abstract
Cellular prion protein (PrP) misfolds into an aberrant and infectious scrapie form (PrPSc) that lead to fatal transmissible spongiform encephalopathies (TSEs). Association of prions with G-quadruplex (GQ) forming nucleic acid motifs has been reported, but implications of these interactions remain elusive. Herein, we show that the promoter region of the human prion gene (PRNP) contains two putative GQ motifs (Q1 and Q2) that assume stable, hybrid, intra-molecular quadruplex structures and bind with high affinity to PrP. Here, we investigate the ability of PrP to bind to the quadruplexes in its own promoter. We used a battery of techniques including SPR, NMR, CD, MD simulations and cell culture-based reporter assays. Our results show that PrP auto-regulates its expression by binding and resolving the GQs present in its own promoter. Furthermore, we map this resolvase-like activity to the N-terminal region (residues 23-89) of PrP. Our findings highlight a positive transcriptional-translational feedback regulation of the PRNP gene by PrP through dynamic unwinding of GQs in its promoter. Taken together, our results shed light on a yet unknown mechanism of regulation of the PRNP gene. This work provides the necessary framework for a plethora of studies on understanding the regulation of PrP levels and its implications in prion pathogenesis.
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Affiliation(s)
- Prashant Pradhan
- Kusuma School of Biological Sciences, IIT Delhi, Hauz Khas, New Delhi 110016, India
| | - Ankit Srivastava
- Kusuma School of Biological Sciences, IIT Delhi, Hauz Khas, New Delhi 110016, India
| | - Jasdeep Singh
- Kusuma School of Biological Sciences, IIT Delhi, Hauz Khas, New Delhi 110016, India
| | - Banhi Biswas
- Kusuma School of Biological Sciences, IIT Delhi, Hauz Khas, New Delhi 110016, India
| | - Akanksha Saini
- Kusuma School of Biological Sciences, IIT Delhi, Hauz Khas, New Delhi 110016, India
| | - Ibrar Siddique
- National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Pooja Kumari
- Transcription Regulation group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Mohd Asim Khan
- Department of Biochemistry, University of Delhi, South Campus, New Delhi 110021, India
| | - Akhilesh Mishra
- Kusuma School of Biological Sciences, IIT Delhi, Hauz Khas, New Delhi 110016, India
| | - Pramod Kumar Yadav
- Kusuma School of Biological Sciences, IIT Delhi, Hauz Khas, New Delhi 110016, India
| | - Shivani Kumar
- Kusuma School of Biological Sciences, IIT Delhi, Hauz Khas, New Delhi 110016, India
| | - Neel Sarovar Bhavesh
- Transcription Regulation group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Prasanna Venkatraman
- Tata Memorial Centre, Advanced Centre for Treatment, Research and Education in Cancer, Kharghar, Navi Mumbai 410210, India; Homi Bhabha National Institute, 2nd floor, BARC Training School Complex, Anushaktinagar, Mumbai, Maharashtra 400094, India
| | - Perumal Vivekanandan
- Kusuma School of Biological Sciences, IIT Delhi, Hauz Khas, New Delhi 110016, India.
| | - Bishwajit Kundu
- Kusuma School of Biological Sciences, IIT Delhi, Hauz Khas, New Delhi 110016, India.
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Adão-Novaes J, Valverde R, Landemberger M, Silveira M, Simões-Pires E, Lowe J, Linden R. Substrain-related dependence of Cu(I)-ATPase activity among prion protein-null mice. Brain Res 2020; 1727:146550. [DOI: 10.1016/j.brainres.2019.146550] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 11/08/2019] [Accepted: 11/09/2019] [Indexed: 01/20/2023]
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Abskharon R, Wang F, Wohlkonig A, Ruan J, Soror S, Giachin G, Pardon E, Zou W, Legname G, Ma J, Steyaert J. Structural evidence for the critical role of the prion protein hydrophobic region in forming an infectious prion. PLoS Pathog 2019; 15:e1008139. [PMID: 31815959 PMCID: PMC6922452 DOI: 10.1371/journal.ppat.1008139] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 12/19/2019] [Accepted: 10/09/2019] [Indexed: 11/18/2022] Open
Abstract
Prion or PrPSc is the proteinaceous infectious agent causing prion diseases in various mammalian species. Despite decades of research, the structural basis for PrPSc formation and prion infectivity remains elusive. To understand the role of the hydrophobic region in forming infectious prion at the molecular level, we report X-ray crystal structures of mouse (Mo) prion protein (PrP) (residues 89-230) in complex with a nanobody (Nb484). Using the recombinant prion propagation system, we show that the binding of Nb484 to the hydrophobic region of MoPrP efficiently inhibits the propagation of proteinase K resistant PrPSc and prion infectivity. In addition, when added to cultured mouse brain slices in high concentrations, Nb484 exhibits no neurotoxicity, which is drastically different from other neurotoxic anti-PrP antibodies, suggesting that the Nb484 can be a potential therapeutic agent against prion disease. In summary, our data provides the first structure-function evidence supporting a crucial role of the hydrophobic region of PrP in forming an infectious prion.
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Affiliation(s)
- Romany Abskharon
- Structural Biology Brussels, Vrije Universiteit Brussel (VUB), Brussels, Belgium
- VIB-VUB Center for Structural Biology, Vlaams Instituut Biotechnologie (VIB), Brussels, Belgium
- Center for Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, United States of America
- National Institute of Oceanography and Fisheries (NIOF), Cairo, Egypt
| | - Fei Wang
- Center for Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, United States of America
- * E-mail: (FW); (JM); (JS)
| | - Alexandre Wohlkonig
- Structural Biology Brussels, Vrije Universiteit Brussel (VUB), Brussels, Belgium
- VIB-VUB Center for Structural Biology, Vlaams Instituut Biotechnologie (VIB), Brussels, Belgium
| | - Juxin Ruan
- Center for Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, United States of America
| | - Sameh Soror
- Structural Biology Brussels, Vrije Universiteit Brussel (VUB), Brussels, Belgium
- VIB-VUB Center for Structural Biology, Vlaams Instituut Biotechnologie (VIB), Brussels, Belgium
- Center of Excellence, Helwan Structural Biology Research, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Gabriele Giachin
- Structural Biology Group, European Synchrotron Radiation Facility, Grenoble, France
| | - Els Pardon
- Structural Biology Brussels, Vrije Universiteit Brussel (VUB), Brussels, Belgium
- VIB-VUB Center for Structural Biology, Vlaams Instituut Biotechnologie (VIB), Brussels, Belgium
| | - Wenquan Zou
- Departments of Pathology and Neurology, Case Western Reserve University School of Medicine, Cleveland, Ohio, United States of America
| | - Giuseppe Legname
- Laboratory of Prion Biology, Department of Neuroscience, Scuola Internazionale Superiore di Studi Avanzati (SISSA), Trieste, Italy
| | - Jiyan Ma
- Center for Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, United States of America
- * E-mail: (FW); (JM); (JS)
| | - Jan Steyaert
- Structural Biology Brussels, Vrije Universiteit Brussel (VUB), Brussels, Belgium
- VIB-VUB Center for Structural Biology, Vlaams Instituut Biotechnologie (VIB), Brussels, Belgium
- * E-mail: (FW); (JM); (JS)
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Friesen M, Meyer-Luehmann M. Aβ Seeding as a Tool to Study Cerebral Amyloidosis and Associated Pathology. Front Mol Neurosci 2019; 12:233. [PMID: 31632238 PMCID: PMC6783493 DOI: 10.3389/fnmol.2019.00233] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 09/11/2019] [Indexed: 12/31/2022] Open
Abstract
Misfolded proteins can form aggregates and induce a self-perpetuating process leading to the amplification and spreading of pathological protein assemblies. These misfolded protein assemblies act as seeds of aggregation. In an in vivo exogenous seeding model, both the features of seeds and the position at which seeding originates are precisely defined. Ample evidence from studies on intracerebal injection of amyloid-beta (Aβ)-rich brain extracts suggests that Aβ aggregation can be initiated by prion-like seeding. In this mini-review article, we will summarize the past and current literature on Aβ seeding in mouse models of AD and discuss its implementation as a tool to study cerebral amyloidosis and associated pathology.
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Affiliation(s)
- Marina Friesen
- Department of Neurology/Neurodegeneration, Medical Center—University of Freiburg, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Melanie Meyer-Luehmann
- Department of Neurology/Neurodegeneration, Medical Center—University of Freiburg, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Center for Basics in NeuroModulation (NeuroModulBasics), Faculty of Medicine, University of Freiburg, Freiburg, Germany
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Jaroniec CP. Two decades of progress in structural and dynamic studies of amyloids by solid-state NMR. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2019; 306:42-47. [PMID: 31311708 PMCID: PMC6703944 DOI: 10.1016/j.jmr.2019.07.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 06/22/2019] [Accepted: 07/08/2019] [Indexed: 05/09/2023]
Abstract
In this perspective article I briefly highlight the rapid progress made over the past two decades in atomic level structural and dynamic studies of amyloids, which are representative of non-crystalline biomacromolecular assemblies, by magic-angle spinning solid-state NMR spectroscopy. Given new and continuing developments in solid-state NMR instrumentation and methodology, ongoing research in this area promises to contribute to an improved understanding of amyloid structure, polymorphism, interactions, assembly mechanisms, and biological function and toxicity.
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Affiliation(s)
- Christopher P Jaroniec
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH 43210, USA.
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Kevadiya BD, Ottemann BM, Thomas MB, Mukadam I, Nigam S, McMillan J, Gorantla S, Bronich TK, Edagwa B, Gendelman HE. Neurotheranostics as personalized medicines. Adv Drug Deliv Rev 2019; 148:252-289. [PMID: 30421721 PMCID: PMC6486471 DOI: 10.1016/j.addr.2018.10.011] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 10/22/2018] [Accepted: 10/23/2018] [Indexed: 12/16/2022]
Abstract
The discipline of neurotheranostics was forged to improve diagnostic and therapeutic clinical outcomes for neurological disorders. Research was facilitated, in largest measure, by the creation of pharmacologically effective multimodal pharmaceutical formulations. Deployment of neurotheranostic agents could revolutionize staging and improve nervous system disease therapeutic outcomes. However, obstacles in formulation design, drug loading and payload delivery still remain. These will certainly be aided by multidisciplinary basic research and clinical teams with pharmacology, nanotechnology, neuroscience and pharmaceutic expertise. When successful the end results will provide "optimal" therapeutic delivery platforms. The current report reviews an extensive body of knowledge of the natural history, epidemiology, pathogenesis and therapeutics of neurologic disease with an eye on how, when and under what circumstances neurotheranostics will soon be used as personalized medicines for a broad range of neurodegenerative, neuroinflammatory and neuroinfectious diseases.
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Affiliation(s)
- Bhavesh D Kevadiya
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Brendan M Ottemann
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Midhun Ben Thomas
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Insiya Mukadam
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, USA
| | - Saumya Nigam
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - JoEllyn McMillan
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Santhi Gorantla
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Tatiana K Bronich
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, USA
| | - Benson Edagwa
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Howard E Gendelman
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA; Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, USA.
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Bender H, Noyes N, Annis JL, Hitpas A, Mollnow L, Croak K, Kane S, Wagner K, Dow S, Zabel M. PrPC knockdown by liposome-siRNA-peptide complexes (LSPCs) prolongs survival and normal behavior of prion-infected mice immunotolerant to treatment. PLoS One 2019; 14:e0219995. [PMID: 31329627 PMCID: PMC6645518 DOI: 10.1371/journal.pone.0219995] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 07/05/2019] [Indexed: 11/29/2022] Open
Abstract
Prion diseases are members of neurodegenerative protein misfolding diseases (NPMDs) that include Alzheimer's, Parkinson's and Huntington diseases, amyotrophic lateral sclerosis, tauopathies, traumatic brain injuries, and chronic traumatic encephalopathies. No known therapeutics extend survival or improve quality of life of humans afflicted with prion disease. We and others developed a new approach to NPMD therapy based on reducing the amount of the normal, host-encoded protein available as substrate for misfolding into pathologic forms, using RNA interference, a catabolic pathway that decreases levels of mRNA encoding a particular protein. We developed a therapeutic delivery system consisting of small interfering RNA (siRNA) complexed to liposomes and addressed to the central nervous system using a targeting peptide derived from rabies virus glycoprotein. These liposome-siRNA-peptide complexes (LSPCs) cross the blood-brain barrier and deliver PrP siRNA to neuronal cells to decrease expression of the normal cellular prion protein, PrPC, which acts as a substrate for prion replication. Here we show that LSPCs can extend survival and improve behavior of prion-infected mice that remain immunotolerant to treatment. LSPC treatment may be a viable therapy for prion and other NPMDs that can improve the quality of life of patients at terminal disease stages.
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Affiliation(s)
- Heather Bender
- Prion Research Center, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States of America
- Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO, United States of America
| | - Noelle Noyes
- Prion Research Center, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States of America
- Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, United States of America
| | - Jessica L. Annis
- Prion Research Center, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States of America
| | - Amanda Hitpas
- Prion Research Center, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States of America
| | - Luke Mollnow
- Prion Research Center, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States of America
| | - Kendra Croak
- Prion Research Center, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States of America
| | - Sarah Kane
- Prion Research Center, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States of America
| | - Kaitlyn Wagner
- Prion Research Center, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States of America
| | - Steven Dow
- Prion Research Center, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States of America
- Center for Immune and Regenerative Medicine, Department of Clinical Sciences, Colorado State University, Fort Collins, CO, United States of America
| | - Mark Zabel
- Prion Research Center, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States of America
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Prasad A, Bharathi V, Sivalingam V, Girdhar A, Patel BK. Molecular Mechanisms of TDP-43 Misfolding and Pathology in Amyotrophic Lateral Sclerosis. Front Mol Neurosci 2019; 12:25. [PMID: 30837838 PMCID: PMC6382748 DOI: 10.3389/fnmol.2019.00025] [Citation(s) in RCA: 485] [Impact Index Per Article: 80.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 01/21/2019] [Indexed: 12/11/2022] Open
Abstract
TAR DNA binding protein 43 (TDP-43) is a versatile RNA/DNA binding protein involved in RNA-related metabolism. Hyper-phosphorylated and ubiquitinated TDP-43 deposits act as inclusion bodies in the brain and spinal cord of patients with the motor neuron diseases: amyotrophic lateral sclerosis (ALS) and frontotemporal lobar degeneration (FTLD). While the majority of ALS cases (90-95%) are sporadic (sALS), among familial ALS cases 5-10% involve the inheritance of mutations in the TARDBP gene and the remaining (90-95%) are due to mutations in other genes such as: C9ORF72, SOD1, FUS, and NEK1 etc. Strikingly however, the majority of sporadic ALS patients (up to 97%) also contain the TDP-43 protein deposited in the neuronal inclusions, which suggests of its pivotal role in the ALS pathology. Thus, unraveling the molecular mechanisms of the TDP-43 pathology seems central to the ALS therapeutics, hence, we comprehensively review the current understanding of the TDP-43's pathology in ALS. We discuss the roles of TDP-43's mutations, its cytoplasmic mis-localization and aberrant post-translational modifications in ALS. Also, we evaluate TDP-43's amyloid-like in vitro aggregation, its physiological vs. pathological oligomerization in vivo, liquid-liquid phase separation (LLPS), and potential prion-like propagation propensity of the TDP-43 inclusions. Finally, we describe the various evolving TDP-43-induced toxicity mechanisms, such as the impairment of endocytosis and mitotoxicity etc. and also discuss the emerging strategies toward TDP-43 disaggregation and ALS therapeutics.
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Affiliation(s)
| | | | | | | | - Basant K. Patel
- Department of Biotechnology, Indian Institute of Technology Hyderabad, Sangareddy, India
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48
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Aivazidis S, Anderson CC, Roede JR. Toxicant-mediated redox control of proteostasis in neurodegeneration. CURRENT OPINION IN TOXICOLOGY 2019; 13:22-34. [PMID: 31602419 PMCID: PMC6785977 DOI: 10.1016/j.cotox.2018.12.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Disruption in redox signaling and control of cellular processes has emerged as a key player in many pathologies including neurodegeneration. As protein aggregations are a common hallmark of several neuronal pathologies, a firm understanding of the interplay between redox signaling, oxidative and free radical stress, and proteinopathies is required to sort out the complex mechanisms in these diseases. Fortunately, models of toxicant-induced neurodegeneration can be utilized to evaluate and report mechanistic alterations in the proteostasis network (PN). The epidemiological links between environmental toxicants and neurological disease gives further credence into characterizing the toxicant-mediated PN disruptions observed in these conditions. Reviewed here are examples of mechanistic interaction between oxidative or free radical stress and PN alterations. Additionally, investigations into toxicant-mediated PN disruptions, specifically focusing on environmental metals and pesticides, are discussed. Finally, we emphasize the need to distinguish whether the presence of protein aggregations are contributory to phenotypes related to neurodegeneration, or if they are a byproduct of PN deficiencies.
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Affiliation(s)
- Stefanos Aivazidis
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO 80045
| | - Colin C Anderson
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO 80045
| | - James R Roede
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO 80045
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49
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Zhou S, Zhu Y, Yao X, Liu H. Carbon Nanoparticles Inhibit the Aggregation of Prion Protein as Revealed by Experiments and Atomistic Simulations. J Chem Inf Model 2018; 59:1909-1918. [DOI: 10.1021/acs.jcim.8b00725] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Shuangyan Zhou
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
- Chongqing Key Laboratory on Big Data for Bio Intelligence, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
| | - Yongchang Zhu
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xiaojun Yao
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, China
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Taipa, Macau, China
| | - Huanxiang Liu
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
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50
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Shannon MD, Theint T, Mukhopadhyay D, Surewicz K, Surewicz WK, Marion D, Schanda P, Jaroniec CP. Conformational Dynamics in the Core of Human Y145Stop Prion Protein Amyloid Probed by Relaxation Dispersion NMR. Chemphyschem 2018; 20:311-317. [PMID: 30276945 DOI: 10.1002/cphc.201800779] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Indexed: 11/08/2022]
Abstract
Microsecond to millisecond timescale backbone dynamics of the amyloid core residues in Y145Stop human prion protein (PrP) fibrils were investigated by using 15 N rotating frame (R1ρ ) relaxation dispersion solid-state nuclear magnetic resonance spectroscopy over a wide range of spin-lock fields. Numerical simulations enabled the experimental relaxation dispersion profiles for most of the fibril core residues to be modelled by using a two-state exchange process with a common exchange rate of 1000 s-1 , corresponding to protein backbone motion on the timescale of 1 ms, and an excited-state population of 2 %. We also found that the relaxation dispersion profiles for several amino acids positioned near the edges of the most structured regions of the amyloid core were better modelled by assuming somewhat higher excited-state populations (∼5-15 %) and faster exchange rate constants, corresponding to protein backbone motions on the timescale of ∼100-300 μs. The slow backbone dynamics of the core residues were evaluated in the context of the structural model of human Y145Stop PrP amyloid.
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Affiliation(s)
- Matthew D Shannon
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, 43210, United States
| | - Theint Theint
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, 43210, United States
| | - Dwaipayan Mukhopadhyay
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, 43210, United States
| | - Krystyna Surewicz
- Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, Ohio, 44106, United States
| | - Witold K Surewicz
- Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, Ohio, 44106, United States
| | | | - Paul Schanda
- Institut de Biologie Structurale (IBS), 38027, Grenoble, France
| | - Christopher P Jaroniec
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, 43210, United States
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