Attenuation of acid induced oesophagitis in VR-1 deficient mice.

Published

Journal Article

Activation of the vanilloid receptor subtype 1 (VR-1) results in release of proinflammatory peptides which initiate an inflammatory cascade known as neurogenic inflammation. We investigated its role in an acute model of surgically induced oesophagitis.Oesophagitis was induced by pyloric ligation in wild-type and VR-1 deficient mice. A subset of animals were administered the VR-1 antagonist capsazepine, famotidine, or omeprazole one hour before surgery. Five hours after surgery, myeloperoxidase activity (MPO), histological damage scores, intragastric pH, and immunocytochemical analysis of substance P (SP) receptor endocytosis were determined.Oesophagitis induced knockout mice exhibited significantly lower levels of MPO activity, histological damage scores, and SP receptor endocytosis than wild-type mice. Inflammatory parameters were significantly reduced by acid inhibition and capsazepine in wild-type mice.We conclude that acute acid induced oesophagitis is reduced in animals lacking VR-1. This suggests that acid induced oesophagitis may act through VR-1 and that inhibition of the receptor may reduce inflammation.

Full Text

Duke Authors

Cited Authors

  • Fujino, K; de la Fuente, SG; Takami, Y; Takahashi, T; Mantyh, CR

Published Date

  • January 2006

Published In

Volume / Issue

  • 55 / 1

Start / End Page

  • 34 - 40

PubMed ID

  • 16091555

Pubmed Central ID

  • 16091555

Electronic International Standard Serial Number (EISSN)

  • 1468-3288

International Standard Serial Number (ISSN)

  • 0017-5749

Digital Object Identifier (DOI)

  • 10.1136/gut.2005.066795

Language

  • eng