Association of the PTPN22 gene (+1858C/T, -1123G/C) polymorphisms with type 1 diabetes mellitus: a systematic review and meta-analysis
Abstract
A meta-analysis was conducted to evaluate the association of PTPN22 gene (+1858C/T -1123G/C) polymorphism with T1DM susceptibility. Electronic databases were used to identify published studies before September 2011. We adopted the most appropriate genetic model. The combined odds ratio (OR) with 95% confidence interval (95% CI) was calculated to estimate the strength of the association in a fixed or random effect model. Heterogeneity and publication bias were also assessed. Totally, 25 case-control studies including 8613 T1DM cases and 10,133 healthy controls (24 studies containing 8129 cases and 9641 controls for PTPN22 +1858C/T, 5 studies including 1460 cases and 1609 controls for PTPN22 -1123G/C) were identified as eligible and analyzed. The most appropriate co-dominant model was adopted. A significant association of PTPN22 +1858C/T gene polymorphism was found in overall population. When stratified by race, significance was observed in Europe and America, but not in Asia. We did not detect any association for PTPN22 -1123G/C polymorphism. Our study indicated that T1DM is associated with PTPN22 +1858C/T gene polymorphism, and targeting this promoter polymorphism should be dependent on ethnicity. Whether -1123G/C polymorphism ...Continue Reading
References
Differential association of the PTPN22 coding variant with autoimmune diseases in a Dutch population
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