Association of vitamin D and vitamin D binding protein (DBP) gene polymorphism with susceptibility of type 2 diabetes mellitus in Bangladesh.

Polymorphism in vitamin D binding protein gene may have an impact on serum vitamin D transport and thus may have relation with type 2 diabetes mellitus. In our study, we investigated the association of serum vitamin D level and vitamin D-binding protein gene polymorphism with the onset of type 2 diabetes mellitus. Blood samples were collected from 104 type 2 diabetic patients and 107 healthy volunteers. Serum vitamin D was measured by high-performance liquid chromatography. Genetic analysis of vitamin D-binging protein gene was carried out by polymerase chain reaction - restriction fragment length polymorphism method. We found significantly (p<0.001) lower level of vitamin D in type 2 diabetic patients compared to control subjects. A significantly negative correlation (r=-0.25, p<0.05) between vitamin D level and fasting blood glucose level was found among type 2 diabetic subjects. The Glu/Glu at codon 416 (rs7041) (p<0.05) and Lys/Lys at codon 420 (rs4588) (p<0.01) variants of vitamin D binding protein gene was significantly higher in type 2 diabetic subjects than controls. The patients with Glu/Glu and Lys/Lys genotypes respectively at codon 416 (odds ratio=2.87; 95% confidence interval=1.19 to 6.95) and 420 (odds ratio=8.9; 95% confidence interval=1.89 to 41.99) were at high risk of developing type 2 diabetes. Our present study strongly suggests that there might have an association of vitamin D, and vitamin D-binding protein gene (codon 416 & 420) polymorphisms with the occurrence of type 2 diabetes mellitus. Copyright © 2017 Elsevier B.V. All rights reserved.

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Md Mostafijur Rahman, Md Bayejid Hosen, Md Omar Faruk, Md Mehedi Hasan, Yearul Kabir, M Zakir Hossain Howlader. Association of vitamin D and vitamin D binding protein (DBP) gene polymorphism with susceptibility of type 2 diabetes mellitus in Bangladesh. Gene. 2017 Dec 15;636:42-47

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PMID: 28888576

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