RS3480 Polymorphism of FNDC5/Irisin Is Associated with Type 2 Diabetes Mellitus in Maya-Mestizo Women.

To investigate the possible association between rs3480 and rs16835198 of the fibronectin type III domain containing 5 () and their haplotypes with the presence of type 2 diabetes mellitus (T2DM) in Maya-Mestizo women. We studied 547 postmenopausal women of Maya-Mestizo origin. The diagnosis of T2DM was based on the criteria of the American Diabetes Association. DNA was obtained from blood leukocytes. rs3480 and rs16835198 of were studied using real-time polymerase chain reaction allelic discrimination. Deviations from Hardy-Weinberg equilibrium and alleles differences, as well as genotype frequencies between groups, were assessed by tests. Using logistic regression analysis, the odds ratio and 95% confidence intervals were calculated to estimate the association between both polymorphisms of FNDC5/Irisin and the presence of T2DM. Pairwise linkage disequilibrium between polymorphisms was calculated by direct correlation , and haplotype analysis was conducted. We found that the G-allele of rs3480, as well as under a dominant model, this polymorphism was significantly associated with T2DM ( = 0.028 and  = 0.003, respectively). Besides, one haplotype was associated with T2DM ( = 0.035). Our results suggest that the rs3480, and one haplotype formed by rs3480 and rs16835198 were associated with the risk of presenting T2DM in Maya-Mestizo women.