These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Genetic variants in IL-23R and ATG16L1 independently predispose to increased susceptibility to Crohn's disease in a Canadian population.
    Author: Newman WG, Zhang Q, Liu X, Amos CI, Siminovitch KA.
    Journal: J Clin Gastroenterol; 2009; 43(5):444-7. PubMed ID: 19276991.
    Abstract:
    GOALS: To establish the relevance of variants in the IL-23R and ATG16L1 genes in inflammatory bowel disease (IBD). AIM: Three recent genome wide association studies have identified variants in the IL-23R and ATG16L1 genes, which modulate susceptibility to Crohn's disease (CD). METHODS: We genotyped 1028 IBD patients, including 443 CD and 347 ulcerative colitis (UC) non-Jewish cases, 238 (183 CD and 55 UC) Jewish cases, and 1005 ethnically matched control subjects for 18 and 11 variants, respectively, in the IL-23R and ATG16L1 genes, including the IL-23R (R381Q) and ATG16L1 (T216A) variants, previously associated with CD. RESULTS: Single nucleotide polymorphisms within each of 3 haplotype blocks across the IL-23R gene were associated with an increased risk of CD. Notably, the minor allele of the IL-23R R381Q variant was present in 2.9% of cases and 6.0% controls (P=0.0001, odds ratio=0.48, 95% confidence interval 0.33-0.69). Homozygosity for the minor (T) allele of the ATG16L1 T216A polymorphism was strongly protective for CD (P=0.0001, odds ratio=0.51, 95% confidence interval 0.38-0.68). No phenotypic associations were detected and no interactions between the genes to increase disease risk were established. CONCLUSIONS: We confirm the association of CD with variants in the IL-23R and ATG16L1 genes and the more modest association of the IL-23R R381Q variant with UC. Our results also suggest that these variants act independently of one another to influence risk and pathogenesis of IBD.
    [Abstract] [Full Text] [Related] [New Search]