BackgroundPolymorphisms rs231775 and rs3087243 of cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) gene have been associated with risk of latent autoimmune diabetes in adults (LADA). However, the results were inconsistent. The purpose of this study was to quantitatively assess the relationship between polymorphisms rs231775 and rs3087243 of CTLA-4 and LADA in a larger pooled population by performing a meta-analysis.
MethodsSystematic search for eligible studies was conducted in PubMed, Web of Science, and Embase. Case-control studies containing genotype frequencies of polymorphisms rs231775 or rs3087243 of CTLA-4 gene were selected, and pooled odds ratios (ORs) with 95% con dence intervals (CIs) were used to assess the associations between polymorphisms of CTLA-4 and LADA in allelic genetic model, dominant genetic model, and recessive genetic model.
ResultsA total of eleven studies, in which ve studies reported rs231775, two studies reported rs3087342, and four studies reported both rs231775 and rs3087243, were identi ed. Among them, one study wasn't included in the following meta-analysis because the distribution of genotypes in the control group didn't comply with Hardy-Weinberg equilibrium. Signi cant associations with susceptibility to LADA were detected for rs231775 (785 cases and 3435 controls, allelic