Protective role of vagal afferents in experimentally-induced colitis in rats

被引:47
作者
Mazelin, L
Theodorou, V
More, J
Fioramonti, J
Bueno, L
机构
[1] INRA, Dept Pharmacol, F-31931 Toulouse, France
[2] Ecole Super Agr Purpan, F-31076 Toulouse, France
来源
JOURNAL OF THE AUTONOMIC NERVOUS SYSTEM | 1998年 / 73卷 / 01期
关键词
capsaicin sensitive fibers; vagal afferents; TNBS-induced colitis;
D O I
10.1016/S0165-1838(98)00113-1
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The aim of this study was to evaluate the regulatory role of vagal afferents in the development of colonic inflammation induced by trinitrobenzenesulfonic acid (TNBS) in rats. Groups of Wistar rats were treated with capsaicin or its vehicle applied perivagally (sham treatment). Colonic transit time was evaluated, and, two days later, one half of the animals received an intracolonic instillation of TNBS/ethanol (40 mg/kg), and the other received saline. Inflammation was evaluated functionally (gut permeability), biochemically (myeloperoxydase activity) and histologically. Vagal capsaicin deafferentation did not modify colonic transit time. In TNBS treated groups, inflammation was enhanced by capsaicin pretreatment, as determined by an increased gut permeability, MPO activity, and histological damage score. These results suggest that vagal afferents have a protective role in TNBS-induced colitis in rats, unrelated to changes in colonic transit time. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:38 / 45
页数:8
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