Association study between BGLAP RS1800247-polymorphic variant and type 2 diabetes mellitus development among hypertensive and non-hypertensive Ukrainians

Abstract

The risk of type 2 diabetes mellitus (T2DM) development depends on a hereditary predisposition. According to the current data, bone tissue enhances insulin gene expression in pancreatic β-cells as well as increases insulin sensitivity of adipocytes, myocytes and hepatocytes through the secretion of undercarboxylated osteocalcin (unOCN). The aim. To analyze the relation between rs1800247 SNP and T2DM occurrence depending on the arterial hypertension (AH) presence, as well as association between rs1800247 and systolic, diastolic, pulse, mean blood pressure among patients with T2DM. Materials and methods. This study included 153 patients with diagnosed T2DM and 311 individuals without any carbohydrate metabolism disorders. Polymerase chain reaction-restriction fragment length polymorphism analysis (PCR-RFLP) was used for BGLAP rs1800247-genotyping. Logistic regression with interaction term “genotype × AH” was used to estimate the association between BGLAP rs1800247-genotypes and T2DM development in dominant, recessive, over-dominant and additive models of inheritance. Linear regression was performed to examine the influence of minor C-allele on the arterial blood pressure. Lipid profile characteristics of T2DM patients were stratified by rs1800247-genotype using ANOVA with Bonferroni post hoc test. All calculations were performed using Statistical Package for the Social Sciences software (SPSS, version 22.0, Chicago, IL, USA). A value of P ˂ 0.05 was considered as significant. Results. No association was found between rs1800247 single nucleotide polymorphism and T2DM development neither in AH patients, nor in subjects without AH (Paint b > 0.05). There was no impact of rs1800247 genotypes on systolic, diastolic, pulse and mean blood pressure among patients with T2DM (P > 0.05). It was showed that T2DM non-hypertensive CC-carriers had significantly lower levels of total cholesterol (P = 0.012) and LDL cholesterol (P = 0.04), but higher concentration of HDL cholesterol (P = 0.015) compared to the TT-genotype. Conclusions. It was showed that CC-carriers had more favorable parameters of lipid metabolism among T2DM non-hypertensive Ukrainians. However, there was no association between rs1800247 SNP and T2DM development as well as blood pressure parameters.

Keywords

• type 2 diabetes mellitus
• hypertension
• osteocalcin
• single nucleotide polymorphism
• tt-homozygote
• tc-heterozygote
• cc-homozygote