Vitamin D receptor (FokI, BsmI and TaqI) gene polymorphisms and type 2 diabetes mellitus: a North Indian study.
BACKGROUND
The vitamin D receptor (VDR) gene is a candidate gene for susceptibility to several diseases. Studies on association between VDR polymorphisms and risk of type 2 diabetes (T2DM) in different ethnic populations are yet inconclusive.


OBJECTIVE
This study was conducted to evaluate association between VDR polymorphisms and genetic susceptibility to T2DM in the north Indian population.


METHODS
One hundred clinically diagnosed T2DM patients and 160 healthy controls from the north Indian population were recruited for genetic association study.


METHODS
Genomic DNA was extracted from blood and genotyped for the single nucleotide polymorphism SNPs of FokI (T/C) [rs2228570], BsmI (A/G) [rs1544410] and TaqI (C/T) [rs731236] by polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP) analysis.


METHODS
Genotype distribution and allelic frequencies were compared between patients and controls. Mean values and odds ratios (ORs) with 95% confidence interval (CI) were calculated using SPSS software (version 15.0).


RESULTS
The genotype distribution, allele and haplotype frequencies of VDR polymorphism did not differ significantly between patients and controls. Mean age and waist-hip ratio of patients were found to be associated with VDR polymorphism. Combination studies showed FFBbtt increased the risk of T2DM in north Indians.


CONCLUSIONS
Our data suggest that VDR gene polymorphism in combination of genotypes is associated with the risk of T2DM and thus requires further studies as a probable genetic risk marker for T2DM.
Bid
Hemant Kumar
HK
Endocrinology Division, CDRI, Lucknow, India.
Konwar
Rituraj
R
Aggarwal
C G
CG
Gautam
Sunaina
S
Saxena
Madhukar
M
Nayak
V Lakshma
VL
Banerjee
Monisha
M
D003924:Diabetes Mellitus, Type 2 / Q000235:genetics*; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D007194:India; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide; D018167:Receptors, Calcitriol / Q000235:genetics*
D018167:Receptors, Calcitriol