Transfection of IL-10 expression vectors into endothelial cultures attenuates alpha4beta7-dependent lymphocyte adhesion mediated by MAdCAM-1.

Abstract:

BACKGROUND:Enhanced expression of MAdCAM-1 (mucosal addressin cell adhesion molecule-1) is associated with the onset and progression of inflammatory bowel disease. The clinical significance of elevated MAdCAM-1 expression is supported by studies showing that immunoneutralization of MAdCAM-1, or its ligands reduce inflammation and mucosal damage in models of colitis. Interleukin-10 (IL-10) is an endogenous anti-inflammatory and immunomodulatory cytokine that has been shown to prevent inflammation and injury in several animal studies, however clinical IL-10 treatment remains insufficient because of difficulties in the route of IL-10 administration and its biological half-life. Here, we examined the ability of introducing an IL-10 expression vector into endothelial cultures to reduce responses to a proinflammatory cytokine, TNF-alpha METHODS:A human IL-10 expression vector was transfected into high endothelial venular ('HEV') cells (SVEC4-10); we then examined TNF-alpha induced lymphocyte adhesion to lymphatic endothelial cells and TNF-alpha induced expression of MAdCAM-1 and compared these responses to control monolayers. RESULTS:Transfection of the IL-10 vector into endothelial cultures significantly reduced TNF-alpha induced, MAdCAM-1 dependent lymphocyte adhesion (compared to non-transfected cells). IL-10 transfected endothelial cells expressed less than half (46 +/- 6.6%) of the MAdCAM-1 induced by TNF-alpha (set as 100%) in non-transfected (control) cells. CONCLUSION:Our results suggest that gene therapy of the gut microvasculature with IL-10 vectors may be useful in the clinical treatment of IBD.

journal_name

BMC Gastroenterol

journal_title

BMC gastroenterology

authors

Sasaki M,Jordan P,Houghton J,Meng X,Itoh M,Joh T,Alexander JS

doi

10.1186/1471-230x-3-3

keywords:

subject

Has Abstract

pub_date

2003-02-20 00:00:00

pages

3

issn

1471-230X

journal_volume

3

pub_type

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