Hypoxia: an alarm signal during intestinal inflammation

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Title: Hypoxia: an alarm signal during intestinal inflammation
Authors: Colgan, Sean P.
Taylor, Cormac T.
Permanent link: http://hdl.handle.net/10197/5064
Date: 6-Apr-2010
Online since: 2013-11-29T10:01:56Z
Abstract: Intestinal epithelial cells that line the mucosal surface of the gastrointestinal tract are positioned between an anaerobic lumen and a highly metabolic lamina propria. As a result of this unique anatomy, intestinal epithelial cells function within a steep physiologic oxygen gradient relative to other cell types. Furthermore, during active inflammatory disease such as IBD, metabolic shifts towards hypoxia are severe. Studies in vitro and in vivo have shown that the activation of hypoxia-inducible factor (HIF) serves as an alarm signal to promote the resolution of inflammation in various mouse models of disease. Amelioration of disease occurs, at least in part, through transcriptional upregulation of nonclassic epithelial barrier genes. There is much interest in harnessing hypoxia-inducible pathways, including stabilizing HIF directly or via inhibition of prolyl hydroxylase enzymes, for therapy of IBD. In this Review, we discuss the signaling pathways involved in the regulation of hypoxia and discuss how hypoxia may serve as an endogenous alarm signal for the presence of mucosal inflammatory disease. We also discuss the pros and cons of targeting these pathways to treat patients with IBD.
Type of material: Journal Article
Publisher: Nature Publishing Group
Journal: Nature Reviews Gastroenterology & Hepatology
Volume: 7
Issue: 5
Start page: 281
End page: 287
Copyright (published version): 2010 Nature Publishing Group
Keywords: hypoxia-inducible factor (HIF)irritable bowel disease (IBD)
DOI: 10.1038/nrgastro.2010.39
Language: en
Status of Item: Peer reviewed
Appears in Collections:SBI Research Collection

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