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      • KCI등재

        A review of major Crohn’s disease susceptibility genes and their role in disease pathogenesis

        Meghan Barrett,Sathees B. Chandra 한국유전학회 2011 Genes & Genomics Vol.33 No.4

        Crohn’s disease (CD) is a chronic inflammatory bowel disease whose relevance is increasing in industrialized society. Recent genome wide association studies revealed over seventy one loci associated with disease penetrance. Several variants that increase disease risk encode for altered proteins that diminish bacterial host defense. NOD2 alters intracellular bacterial sensing while ATG16L1 is thought to diminish bacterial clearance by impairing autophagy. Additionally, changes in the IBD5locus are thought to diminish barrier function. Alternatively,recent data indicate a gain of function genetic variant of IL23R is protective amongst European CD patients. These recent genetic discoveries contradict historical theories that Crohn’s disease results from overactive auto-aggressive responses. Rather,new genetic data suggest disease-associated variants encode for dysfunctional proteins that diminish essential innate immune responses against commensal organisms. This review provides an overview of these critical discoveries and places them in their biological context.

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