Influence ofGSTM1,GSTT1, andGSTP1Polymorphisms on Type 2 Diabetes Mellitus and Diabetic Sensorimotor Peripheral Neuropathy Risk

Abstract

Background and Aims. Diabetic neuropathy is a frequent complication of type 2 diabetes mellitus (T2DM). Genetic susceptibility and oxidative stress may play a role in the appearance of T2DM and diabetic neuropathy. We investigated the relation between polymorphism in genes related to oxidative stress such asGSTM1,GSTT1, andGSTP1and the presence of T2DM and diabetic neuropathy (DN).Methods. Samples were collected from 84 patients with T2DM (42 patients with DN and 42 patients without DN) and 98 healthy controls and genotyped by using polymerase chain reaction and restriction fragment length polymorphism method.Results.GSTP1Ile105Val polymorphism was associated with the risk of developing T2DM (p=0.05) but not with the risk of developing DN in diabetic cases.GSTM1andGSTT1gene polymorphisms were associated with neither the risk of developing T2DM nor the risk of DN occurrence in diabetic patients. No association was observed between the patients with T2DM and DSPN (diabetic sensorimotor peripheral neuropathy) and T2DM without DSPN regarding investigated polymorphism.Conclusion. Our data suggest thatGSTP1gene polymorphisms may contribute to the development of T2DM in Romanian population.GSTM1,GSTT1, andGSTP1gene polymorphisms are not associated with susceptibility of developing diabetic neuropathy in T2DM patients.