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. 2002 Jun;47(6):1349-55.
doi: 10.1023/a:1015334917273.

Innate immunity and colonic inflammation: enhanced expression of epithelial alpha-defensins

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Innate immunity and colonic inflammation: enhanced expression of epithelial alpha-defensins

J Wehkamp et al. Dig Dis Sci. 2002 Jun.

Abstract

Human alpha-defensins contribute to local intestinal host defense as part of innate immunity and may be of major relevance in microbial infection and chronic inflammatory bowel disease. The objective was to investigate human defensin 5 and 6 (HD-5, HD-6) mRNA expression by RT-PCR from colonic biopsies and peptide expression by immunohistochemistry from colonic resections under basal and inflammatory conditions. Both alpha-defensins were induced by proinflammatory cytokines in cell culture. HD-5 mRNA expression was enhanced in both idiopathic and nonidiopathic inflammatory states of the large bowel [32% of control vs 73% of unspecific colitis, 69% of Crohn's disease (CD) and 73% of ulcerative colitis (UC)], whereas HD-6 was specifically related to CD and UC (14% in controls vs 20% in unspecific coltis, 49% in CD and 42% in UC). Immunohistochemistry confirmed the presence of HD-5 in colonic epithelium. Antimicrobial peptides in the colon may be of importance in maintaining the mucosal barrier and controlling microbial invasion in inflammatory bowel diseases.

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References

    1. Dig Dis Sci. 1999 Jul;44(7):1440-7 - PubMed
    1. FEBS Lett. 1993 Jan 4;315(2):187-92 - PubMed
    1. FEBS Lett. 1998 Sep 4;434(3):272-6 - PubMed
    1. Gut. 1999 Jun;44(6):812-8 - PubMed
    1. J Biol Chem. 1996 Feb 23;271(8):4038-45 - PubMed

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