Journal
MICROCIRCULATION
Volume 8, Issue 5, Pages 283-301Publisher
WILEY
DOI: 10.1038/sj.mn.7800095
Keywords
adhesion molecules; blood flow; Crohn's disease; edema; free radicals; leukocytes; nitric oxide; regulatory cells; T-lymphocytes; ulcerative colitis; vasculature
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Funding
- NIDDK NIH HHS [DK43785, DK47663] Funding Source: Medline
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Inflammatory bowel disease (IBD) is a chronic inflammatory condition of the intestine and/or colon of unknown etiology in which patients suffer from severe diarrhea, rectal bleeding, abdominal pain, fever and weight loss. Active episodes of IBD are characterized by vasodilation, venocongestion, edema, infiltration of large numbers of inflammatory cells and erosions and ulceration of the bowel. It is becoming increasingly apparent that chronic gut inflammation may result from a dysregulated immune response toward components of the normal intestine flora, resulting in a sustained overproduction of proinflammatory cytokines and mediators. Many of theses Th1 and macrophage-derived cytokines and lipid metabolites are known to activate microvascular endothelial cells, thereby promoting leukocyte recruitment into the intestinal interstitium. This review discusses the basic immune mechanisms involved in the regulation of inflammatory response in the gut and describes how a breakdown in this protective response initiates chronic gut inflammation.
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