3) revealed that the rs6725556G allele was associated with lower risk of T2D (OR per G-allele: 0.82, 95%CI: 0.69–0.96; p = 0.015). We genotyped click here rs2943641C > T, located 500 kb downstream of IRS1, in 2389 prevalent or incident T2D patients and 6494 controls from two prospective and three case studies based in UK and found evidence for an association of the minor rs2943641T allele with T2D protection. This allele was associated with lower fasting insulin and HOMA-IR index in middle-aged participants of the WHII study and with lower post-load insulin after OGTT in young adults of the EARSII study. In silico analysis with follow-up genotyping also identified that the minor allele of the IRS1 promoter variant

rs6725556A > G showed association with reduced T2D risk (OR per G-allele: 0.82, 95%CI: 0.69–0.96, p = 0.015). Rung and

colleagues [13] identified rs2943641 as a T2D susceptibility locus in a multistage association study across 14,051 French and Danish individuals (6258 cases and 7793 controls) and showed strong association of the major C-allele with increased risk of T2D (OR: 1.19, 95%CI: 1.13–1.25, p = 9.3 × 10−12). This result is equivalent to OR per T-allele: 0.84, 95%CI: 0.80–0.88. Our findings in these UK studies are consistent with an association of rs2943641T with 6% decreased risk of T2D (OR per T-allele: 0.94, 95%CI: 0.87–1.03, p = 0.18). This association became statistically significant when analyses were repeated selleck products with additional adjustment for BMI (overall OR: 0.88; 95%CI: 0.80–0.96, p = 0.006), although since there was no relationship of this SNP with BMI, and GWAS of genetic variants influencing BMI, obesity and related phenotypes have not identified IRS1 as a BMI related gene [8], the mechanism of this is unclear. Notably, data from the recently published DIAGRAM meta-analysis [6] identified a different SNP (rs7578326A > G) adjacent to rs2943641 to be associated with T2D (OR per A-allele: 1.11, 95%CI: 1.08–1.13, p = 5.4 × 10−20; 42,542 cases and 98,912 controls). The two SNPs lie ∼73 kb apart and are in selleck kinase inhibitor strong LD (r2 = 0.79 in HapMap CEU), and

therefore this finding provides further confirmation of the previously reported signal. Moreover, using data from up to 46,186 non-diabetic subjects from the Meta-Analyses of Glucose and Insulin-related traits Consortium the authors reported the risk allele to be associated with higher fasting insulin [6], consistent with a primary effect on insulin action. Rung and colleagues [13] also examined the effect of rs2943641 on diabetes-related quantitative traits in three independent cohorts with normoglycemic individuals of Finnish, French and Danish origin (n = 14,358) and found that the diabetogenic rs2943641C allele was associated with higher fasting insulin and HOMA-IR indices, but not with fasting glucose levels. In middle-aged Danes, the C-allele was also associated with higher insulin levels after OGTT [13].