Brief Article
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World J Gastrointest Pharmacol Ther. Oct 6, 2011; 2(5): 36-41
Published online Oct 6, 2011. doi: 10.4292/wjgpt.v2.i5.36
Capsaicin-sensitive afferentation represents an indifferent defensive pathway from eradication in patients with H. pylori gastritis
Lilla Lakner, András Dömötör, Csaba Tóth, Imre L Szabó, Ágnes Meczker, Rebeka Hajós, László Kereskai, György Szekeres, Zoltán Döbrönte, Gyula Mózsik
Lilla Lakner, Zoltán Döbrönte, Department of Medicine and Gastroenterology, Markusovszky Teaching Hospital, Szombathely, H-9700, Hungary
András Dömötör, Imre L Szabó, Gyula Mózsik, First Department of Medicine, Medical and Health Centre, University of Pécs, Pécs, H-7624, Hungary
Csaba Tóth, Department of Pathology, Markusovszky Teaching Hospital, Szombathely, H-9700, Hungary
László Kereskai, Department of Pathology, University of Pécs, Pécs, H-7624, Hungary
Ágnes Meczker, Rebeka Hajós, György Szekeres, Histopathology Ltd., Pécs, H-7631, Hungary
Author contributions: All authors wrote this paper.
Supported by Grant Baross (REG_DD_KFI_09, CAPSATAB, Hungary)
Correspondence to: Gyula Mózsik, MD, PhD, ScD(med), First Department of Medicine, Medical and Health Centre, University of Pécs, Pécs, H-7624, Hungary. gyula.mozsik@aok.pte.hu
Telephone: +36-72-536494 Fax: +36-72-536495
Received: December 20, 2010
Revised: September 20, 2011
Accepted: September 28, 2011
Published online: October 6, 2011
Abstract

AIM: To study the role of capsaicin-sensitive afferent nerves in Helicobacter pylori (H. pylori) positive chronic gastritis before and after eradication.

METHODS: Gastric biopsy samples were obtained from corpus and antrum mucosa of 20 healthy human subjects and 18 patients with H. pylori positive chronic gastritis (n = 18) before and after eradication. Traditional gastric mucosal histology (and Warthin-Starry silver impregnation) and special histochemical examinations were carried out. Immunohistochemistry for capsaicin receptor (TRVP1), calcitonin gene-related peptide (CGRP) and substance P (SP) were carried out by the labeled polymer immunohistological method (Lab Vision Co., USA) using polyclonal rabbit and rat monoclonal antibodies (Abcam Ltd., UK).

RESULTS: Eradication treatment was successful in 16 patients (89%). Seven patients (7/18, 39%) remained with moderate complaints, meanwhile 11 patients (11/28, 61%) had no complaints. At histological evaluation, normal gastric mucosa was detected in 4 patients after eradication treatment (4/18, 22%), and moderate chronic gastritis could be seen in 14 (14/18, 78%) patients. Positive immuno-staining for capsaicin receptor was seen in 35% (7/20) of controls, 89% (16/18, P < 0.001) in patients before and 72% (13/18, P < 0.03) after eradication. CGRP was positive in 40% (8/20) of controls, and in 100% (18/18, P < 0.001) of patients before and in 100% (18/18, P < 0.001) after eradication. The immune-staining of gastric mucosa for substance-P was positive in 25% (5/20) of healthy controls, and in 5.5% (3/18, P > 0.05) of patients before and in 0% of patients (0/18, P > 0.05) after H. pylori eradication.

CONCLUSION: Distibution of TRVP1 and CGRP is altered during the development of H. pylori positive chronic gastritis. The immune-staining for TRVP1, CGRP and SP rwemained unchanged before and after H. pylori eradication treatment. The capsaicin-sensitive afferentation is an independent from the eradication treatment. The 6 wk time period might not be enough time for the restituion of chronic H. pylori positive chronic gastritis. The H. pylori infection might not represent the main pathological factor in the development of chronic gastritis

Keywords: Capsaicin-sensitive afferentation, Helicobacter pylori, Eradication therapy, Afferent and efferent vagal nerves, Transient potential vanilloid receptor 1, Calcitonin gene-related peptide, Substance P