rs2241880, a SNP in the ATG16L1 gene encoding a threonine to alanine substitution ("T300A") in a protein known to be involved in the function of the epithelial cells lining the intestine, has been associated with Crohn's disease in several recent studies. [PMID 17200669, PMID 17435756]
In another recent (2007) report, rs2241880 is confirmed to be associated with both Crohn's disease and ileal disease, but additionally, the authors calculate risk for individuals who are homozygotes for this SNP plus 2 others (in the IBD5 and NOD2 genes). Individuals homozygous for the risk alleles for all 3 of these SNPs are estimated to be at 20 fold higher risk (CI ~9-49) for Crohn's disease. [PMID 17484864] From the largest most recent survey, the Crohn's disease-associated SNPs for IBD5 and NOD2 are, respectively, rs6596075 and rs17221417. [PMID 17554300]
[PMID 18047540] associated With Inflammatory Bowel Diseases but Not With Celiac Disease rs11209026 had a protective effect for IBD in the case-control analysis (odds ratio [OR] 0.19, 95% confidence interval [CI] 0.10-0.37, P= 6.6E-09). Both CD (OR 0.14, CI 0.06-0.37, P= 3.9E-07) and UC (OR 0.33, CI 0.15-0.73, P= 1.4E-03) were associated with IL23R. rs2241880 was associated with CD susceptibility (OR 1.36, CI 1.12-1.66, P= 0.0017). The population-attributable risk of carrying allele G is 0.24 and is 0.19 for homozygosity for allele G in CD.
In another study, rs2241880 has been associated with Crohn's disease; the minor allele is somewhat protective in that it lessens the odds of acquiring the disease (odds ratio 0.74, CI: 0.65-0.84, p=3.7x10e-6).[PMID 18162085]
[PMID 18985712] strongly associated with ileal Crohn's disease (allelic P = 1.24 x 10(-6)). Children with GG genotype had a more than 3-fold elevated risk for disease as compared to the wildtype AA homozygotes (odds ratio [OR], 3.1; 95% confidence interval [CI], 1.93-4.94; P = 1.8 x 10(-6))
[PMID 19337756] Meta-analysis of 24 studies performed, including 13,022 Crohn's disease cases and 17,532 controls. Confirmed increased risk for disease for carriers of (C) allele (1.9x or 1.4x, for homozygous and heterozgous genotypes), but only in Caucasians and not in Asians.
[PMID 19491842] Study of 557 CD and 425 UC patients and 672 ethnically matched Spanish controls and a meta-analysis confirmed an association between rs2241880(C) and CD (p=6.5 x 10(-9), odds ratio =1.62).
[PMID 19174780] Confirmation of multiple Crohn's disease susceptibility loci in a large Dutch-Belgian cohort
[PMID 19575361] Role of ATG16L1 Thr300Ala polymorphism in inflammatory bowel disease: A Study in the Spanish population and a meta-analysis
[PMID 19590455] Association of IL23R p.381Gln and ATG16L1 p.197Ala With Crohn Disease in the Czech Population
[PMID 20380008] NOD2/CARD15, ATG16L1 and IL23R gene polymorphisms and childhood-onset of Crohn's disease
[PMID 20485703] Replication and meta-analysis of 13,000 cases defines the risk for interleukin-23 receptor and autophagy-related 16-like 1 variants in Crohn's disease
|Title||Fucosyltransferase 2(FUT2) Non-Secretor Status is associated with Crohn's Disease|
|Odds Ratio||1.32 [1.18-1.47]|
[PMID 21206965] IL23R, NOD2/CARD15, ATG16L1 and PHOX2B polymorphisms in a group of patients with Crohn's disease and correlation with sub-phenotypes
[PMID 21513755] ATG16L1 gene polymorphisms are associated with palmoplantar pustulosis
[PMID 22115380] Prediction of disease complication occurrence in Crohn's disease using phenotype and genotype parameters at diagnosis
[PMID 22457781] PTPN2 Gene Variants Are Associated with Susceptibility to Both Crohn's Disease and Ulcerative Colitis Supporting a Common Genetic Disease Background
|Title||A genome-wide scan of Ashkenazi Jewish Crohn's disease suggests novel susceptibility loci.|
|Odds Ratio||1.3200 None|
[PMID 17068223] A genome-wide association study identifies IL23R as an inflammatory bowel disease gene.
[PMID 17447842] Novel Crohn disease locus identified by genome-wide association maps to a gene desert on 5p13.1 and modulates expression of PTGER4.
[PMID 17455206] Confirmation of the role of ATG16L1 as a Crohn's disease susceptibility gene.
[PMID 17684544] Systematic association mapping identifies NELL1 as a novel IBD disease gene.
[PMID 17894849] IL23R R381Q and ATG16L1 T300A are strongly associated with Crohn's disease in a study of New Zealand Caucasians with inflammatory bowel disease.
[PMID 17924341] Fine mapping versus replication in whole-genome association studies.
[PMID 18088053] Autophagy gene ATG16L1 influences susceptibility and disease location but not childhood-onset in Crohn's disease in Northern Europe.
[PMID 18200510] CARD15 and IL23R influences Crohn's disease susceptibility but not disease phenotype in a Brazilian population.
[PMID 18495612] [Correlation of the autophagosome gene ATG16L1 polymorphism and inflammatory bowel disease].
[PMID 18499543] ATG16L1 and IL23 receptor (IL23R) genes are associated with disease susceptibility in Hungarian CD patients.
[PMID 18715515] Lack of evidence for association of primary sclerosing cholangitis and primary biliary cirrhosis with risk alleles for Crohn's disease in Polish patients.
[PMID 18853133] Gene variants influencing measures of inflammation or predisposing to autoimmune and inflammatory diseases are not associated with the risk of type 2 diabetes.
[PMID 19185283] Searching for genotype-phenotype structure: using hierarchical log-linear models in Crohn disease.
[PMID 19659808] Autophagy 16-like 1 rs2241880 G allele is associated with Crohn's disease in German children.
[PMID 19683022] Lack of association of NKX2-3, IRGM, and ATG16L1 inflammatory bowel disease susceptibility variants with celiac disease.
[PMID 19916168] Genome-wide association studies--a summary for the clinical gastroenterologist.
[PMID 20066736] Interaction of the major inflammatory bowel disease susceptibility alleles in Crohn's disease patients.
[PMID 20082483] NOD2, IL23R and ATG16L1 polymorphisms in Lithuanian patients with inflammatory bowel disease.
[PMID 20195480] The cannabinoid 1 receptor (CNR1) 1359 G/A polymorphism modulates susceptibility to ulcerative colitis and the phenotype in Crohn's disease.
[PMID 20222171] T300A polymorphism of ATG16L1 and susceptibility to inflammatory bowel diseases: a meta-analysis.
[PMID 20395867] Is there a role for Crohn's disease-associated autophagy genes ATG16L1 and IRGM in formation of granulomas?
[PMID 20454450] Evidence for STAT4 as a common autoimmune gene: rs7574865 is associated with colonic Crohn's disease and early disease onset.
[PMID 21673517] ATG16L1 polymorphisms are associated with NOD2-induced hyperinflammation.
|qualified_impact||Insufficiently evaluated not reviewed|
[PMID 23535819] Lack of association of the autophagy-related gene polymorphism ATG16L1 rs2241880 in RA predisposition
[PMID 23633462] A polymorphism in an autophagy-related gene, ATG16L1, influences time to delivery in women with an unfavorable cervix who require labor induction