Title |
The Endogenous Hydrogen Sulfide Producing Enzyme Cystathionine-β Synthase Contributes to Visceral Hypersensitivity in a Rat Model of Irritable Bowel Syndrome
|
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Published in |
Molecular Pain, January 2009
|
DOI | 10.1186/1744-8069-5-44 |
Pubmed ID | |
Authors |
Guang-Yin Xu, John H Winston, Mohan Shenoy, Shufang Zhou, Jiande DZ Chen, Pankaj J Pasricha |
Abstract |
The pathogenesis of visceral hypersensitivity, a characteristic pathophysiological feature of irritable bowel syndrome (IBS), remains elusive. Recent studies suggest a role for hydrogen sulfide (H2S) in pain signaling but this has not been well studied in visceral models of hyperalgesia. We therefore determined the role for the endogenous H2S producing enzyme cystathionine-beta-synthetase (CBS) in a validated rat model of IBS-like chronic visceral hyperalgesia (CVH). CVH was induced by colonic injection of 0.5% acetic acid (AA) in 10-day-old rats and experiments were performed at 8-10 weeks of age. Dorsal root ganglion (DRG) neurons innervating the colon were labeled by injection of DiI (1,1'-dioleyl-3,3,3',3-tetramethylindocarbocyanine methanesulfonate) into the colon wall. |
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