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Up-regulating effect of hepatitis C virus NS5A protein on NS3TP6 gene promoter
Yuan Hong, Qian Yang, Jun Cheng, Yan Liu, Jian-Jun Wang
Yuan Hong, Qian Yang, Jun Cheng, Yan Liu, Jian-Jun Wang, Gene Therapy Research Center, Institute of Infectious Diseases, the 302 Hospital of PLA, Beijing 100039, China
Supported by: Grants from the National Natural Scientific Foundation, No. C03011402, No. C30070689; and the 9.5 Research and Technique Foundation of PLA, No. 98D063; and the Launching Foundation for Student Studying Abroad of PLA, No. 98H038; and the 10.5 Youth Research and Technique Foundation of PLA, No. 01Q138; and the 10.5 Research and Technique Foundation of PLA, No. 01MB135.
Correspondence to: Dr. Jun Cheng, Gene Therapy Research Center, Institute of Infectious Diseases, The 302 Hospital of PLA, 100 Xisihuanzhong Road, Beijing 100039, China. cj@genetherapy.com.cn
Received: November 13, 2003 Revised: December 1, 2003 Accepted: December 16, 2003 Published online: April 15, 2004
AIM: To investigate the regulatory effects of non-structural protein 5A of hepatitis C virus (HCV NS) protein on NS3TP6 gene promoter.
METHODS: The sequence of NS3TP6 gene promoter was identified in GenBank by bioinformatics and amplified from HepG2 genome by polymerase chain reaction (PCR), which was cloned into pCAT3 reporter vector. The HepG2 cell line was transfected by pCAT3-NS3TP6-p, and co-tranfected by pCAT3-NS3TP6-p and pcDNA3.1(-)-NS5A, respectively. The chloramphenicol acetyltransferase (CAT) activity was detected by an enzyme-linked immunosorbent assay (ELISA) kit.
RESULTS: The recombinant vector of reporter gene expressive vector pCAT3-NS3TP6-p was approved correctly by restriction enzyme digestion and sequencing analysis. In the transfection experiment of HepG2, pCAT3-NS3TP6-p had higher activity of CAT expression than that of pCAT3-basic demonstrated by an ELISA kit. The expression level of CAT in co-transfection of pCAT3-NS3TP6-p and pcDNA3.1(-)-NS5A was 1.87 times as higher as that of pCAT3- NS3TP6-p plasmid alone.
CONCLUSION: Cell transfection and ELISA technology are successfully used to prove the results from microarray of HCV NS5A, which brings some new clues for studying the trans-regulated and immune regulation mechanism of NS5A.
Key Words: N/A
Citation: Hong Y, Yang Q, Cheng J, Liu Y, Wang JJ. Up-regulating effect of hepatitis C virus NS5A protein on NS3TP6 gene promoter. Shijie Huaren Xiaohua Zazhi 2004; 12(4): 813-816
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