Abstract
The KCNJ11 and ABCC8 genes encode the components of the pancreatic ATP-sensitive potassium (KATP) channel, which regulates insulin secretion by β-cells and hence could be involved in the pathogenesis of type 2 diabetes (T2D). The KCNJ11 E23K and ABCC8 exon 31 variants have been studied in 127 Russian T2D patients and 117 controls using the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) approach. The KCNJ11 E23 variant and the ABCC8 exon 31 allele A were associated with higher risk of T2D [Odds ratio (OR) of 1.53 (P = 0.023) and 2.41 (P = 1.95 × 10−5)], respectively. Diabetic carriers of the ABCC8 G/G variant had reduced 2 h glucose compared to A/A + A/G (P = 0.031). The G/G genotype of ABCC8 was also significantly associated with increased both fasting and 2 h serum insulin in diabetic and non-diabetic patients. A HOMA-β value characterizing the β-cell homeostasis was higher in the non-diabetic carriers homozygous for G/G (98.0 ± 46.9) then for other genotypes (HOMA-β = 85.6 ± 45.5 for A/A + A/G, P = 0.0015). The KCNJ11 E23K and ABCC8 exon 31 variants contribute to susceptibility to T2D diabetes, glucose intolerance and altered insulin secretion in a Russian population.
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Chistiakov, D.A., Potapov, V.A., Khodirev, D.C. et al. Genetic variations in the pancreatic ATP-sensitive potassium channel, β-cell dysfunction, and susceptibility to type 2 diabetes. Acta Diabetol 46, 43–49 (2009). https://doi.org/10.1007/s00592-008-0056-5
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DOI: https://doi.org/10.1007/s00592-008-0056-5