Sasaki M, Jordan P, Houghton J, Meng X, Itoh M, Joh T, Alexander JS. Transfection of IL-10 expression vectors into endothelial cultures attenuates alpha4beta7-dependent lymphocyte adhesion mediated by MAdCAM-1.
BMC Gastroenterol 2003;
3:3. [PMID:
12625840 PMCID:
PMC151603 DOI:
10.1186/1471-230x-3-3]
[Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2002] [Accepted: 02/20/2003] [Indexed: 12/14/2022] Open
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.
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