Crohn's disease-Defect in innate defence.

Crohn's disease-Defect in innate defence. Research Abstract Details 

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Crohn's disease-Defect in innate defence. Abstract Text:

Crohn's disease may prinicipally involve the whole gastrointestinal tract. Most commonly, the inflammation occurs in the small intestine and/or in the colon with stable disease location over the years. The pathogenesis of both disease phenotypes is complex, the likely primary defect lies in the innate rather than adaptive immunity, particularly in the chemical antimicrobial barrier of the mucosa. Crohn's ileitis is associated with a reduced expression of the Wnt signalling pathway transcription factor T-cell factor 4 (TCF4), which is regulating Paneth cell differentiation. As a result, the alpha-defensins and principal Paneth cell products HD5 and HD6 are deficiently expressed in ileal disease, independent of current inflammation. In contrast, Crohn's colitis is typically associated with an impaired induction of the beta-defensins HBD2 and HBD3 caused by fewer gene copy numbers in the gene locus of the beta-defensins on chromosome 8. This ileal and colonic defect in innate defence mediated by a deficiency of the protective alpha- and beta-defensins may enable the luminal microbes to invade the mucosa and trigger the inflammation. A better understanding of the exact molecular mechanisms behind ileal and colonic Crohn's disease may give rise to new therapeutic strategies based on a stimulation of the protective innate immune system.

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PUBLICATION TYPE: Journal Article

Journal: World journal of gastroenterology : WJG

VOLUME: 14

Page Numbers: 5499-503

Journal Abbreviation: World J. Gastroenterol.

ISSN: 1007-9327

DAY: 28

MONTH: Sep

YEAR: 2008

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LANGUAGE: eng

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AFFILIATION: Robert Bosch Hospital, Internal Medicine I Auerbachstr. 110, D-70376 Stuttgart, Germany. eduard.stange@rbk.de.

Country: China

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MEDLINETA: World J Gastroenterol

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