Вісник медичних і біологічних досліджень (Feb 2021)

Peculiarities of carbohydrate metabolism in patients with comorbid course of type 2 diabetes mellitus: Relationship with IRS1 gene polymorphism

  • U.P. Hevko,
  • Mariya I. Marushchak,
  • R.O. Bobyk,
  • A.M. Shumeliak

DOI
https://doi.org/10.11603/bmbr.2706-6290.2021.1.12102
Journal volume & issue
Vol. 3, no. 1
pp. 37 – 45

Abstract

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Despite significant advances in genetic predisposition to type 2 diabetes mellitus (T2DM), which have been confirmed by large-scale genomic and clinical studies, most of the genetic factors that cause the development of T2DM remain unclear. The aim of the study – to determine the association of IRS1 gene polymorphism (rs2943640) with carbohydrate metabolism in patients with type 2 diabetes mellitus in combination with obesity and chronic pancreatitis. Materials and Methods. The study included 33 patients with T2DM (patients with T2DM, T2DM + obesity, T2DM + obesity + chronic pancreatitis) and 10 healthy individuals. The level of glycated hemoglobin (HbA1c) was determined using an automatic biochemical analyzer COBAS 6000 (Roche Hitachi, Germany). The level of insulin in the blood was determined on an enzyme-linked immunosorbent assay from Thermo Scientific Multiskan FC, and the glucose concentration was determined using standard kits on an automatic biochemical analyzer from COBAS INTEGRA® 400 (Roche Diagnostics). Polymorphism of the IRS1 gene (rs2943640) C> A was genotyped by real-time PCR TaqMan method (Applied Biosystems, Foster City, CA, USA). Results. Carriers of the C allele of the IRS1 gene (rs2943640), patients with combined type 2 diabetes, obesity and chronic pancreatitis have the highest levels of insulin and HOMA-IR, which are probably higher than in patients with type 2 diabetes (329.75 %, respectively) and 65.13 %) and in patients with combined type 2 diabetes and obesity (314.53 % and 69.23 %, respectively). Patients with type 2 diabetes mellitus, regardless of the presence/absence of comorbid obesity and chronic pancreatitis, carriers of the C/C genotype of the IRS1 gene (rs2943640) have the highest carbohydrate metabolism, relative to the data of carriers of the C/A genotype. Conclusions. In patients with combined course of type 2 diabetes, obesity and chronic pancreatitis, the nature of carbohydrate metabolism disorders is influenced by polymorphism of the IRS1 gene (rs2943640)

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