title: Correlation between IRGM genetic polymorphisms and Crohn's disease risk: a meta-analysis of case-control studies.
abstract: This meta-analysis was performed to evaluate the relationships between single-nucleotide polymorphisms (SNPs) in the immunity-related GTPase M (IRGM) gene and the risk of Crohn's disease (CD). Eleven case-control studies were included, for a total of 5183 CD patients and 5571 healthy controls. Three common SNPs (rs13361189 C>T, rs10065172 C>T, and rs4958847 A>G) in the IRGM gene were assessed. We found that the IRGM rs13361189 polymorphism was significantly associated with an increased risk of CD [C allele vs T allele: odds ratio (OR) = 1.30, 95% confidence interval (CI) = 1.05-1.61, P = 0.017; CC + CT vs TT: OR = 1.32, 95%CI = 1.06-1.64, P = 0.013]. However, we observed no correlation between the rs10065172 and rs4958847 polymorphisms in the IRGM gene with susceptibility to CD (all P > 0.05). Subgroup analysis by ethnicity revealed significant associations between IRGM genetic polymorphisms and an increased risk of CD among Caucasian populations (C allele vs T allele: OR = 1.22, 95%CI = 1.07-1.40, P = 0.004; CC + CT vs TT: OR = 1.22, 95%CI = 1.05-1.41, P = 0.009), but not among Asian populations (all P > 0.05). Meta-regression analysis also confirmed that ethnic differences may be an important source of heterogeneity (P = 0.003). Our meta-analysis results indicate that the IRGM rs13361189 polymorphism contributes to the susceptibility to CD. Thus, the IRGM rs13361189 polymorphism is promising as a biomarker for early diagnosis of CD. However, the IRGM rs10065172 and rs4958847 polymorphisms may not be the major determinants of CD risk.
authors.affiliation: Department of Gastroenterology, People's Hospital of Liaoning Province, Shenyang, China lnph_ly@163.com.
authors.forename: Y
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Gastroenterology, People's Hospital of Liaoning Province, Shenyang, China.
authors.forename: S-T
authors.initials: ST
authors.lastname: Feng
authors.affiliation: First Department of Gastroenterology, People's Hospital of Liaoning Province, Shenyang, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Yao
authors.affiliation: Department of Gastroenterology, People's Hospital of Liaoning Province, Shenyang, China.
authors.forename: L
authors.initials: L
authors.lastname: Yang
authors.affiliation: Department of Gastroenterology, People's Hospital of Liaoning Province, Shenyang, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Xing
authors.affiliation: Department of Gastroenterology, People's Hospital of Liaoning Province, Shenyang, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Respiratory Medicine, People's Hospital of Liaoning Province, Shenyang, China.
authors.forename: J-H
authors.initials: JH
authors.lastname: You
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D044466:Asian People; D016022:Case-Control Studies; D003424:Crohn Disease / Q000235:genetics*; D005260:Female; D019204:GTP-Binding Proteins / Q000235:genetics*; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D044465:White People; D055815:Young Adult
chemical_list: D019204:GTP-Binding Proteins; C513539:IRGM protein, human