Role of Fok I VDR polymorphism in TB risk assessment; A Study in Central India population

Purpose

Study aim to investigate the possible role of Fok I VDR polymorphism in TB risk assessment.

Methods

To investigate the role of Fok I VDR polymorphism in TB risk assessment, we collected a blood sample from 106 healthy individuals including both gender. The genomic DNA was isolated and the VDR gene was amplified using gene-specific primers using polymerase chain reaction. The Genotyping of the Fok I polymorphism was performed using Fok I restriction enzyme. The distribution of genotype frequencies of VDR gene polymorphisms was calculated using Hardy-Weinberg equilibrium calculator.

Results

In the present investigation, the VDR gene was amplified with an undigested DNA band of 265 bp as FF homozygote. Additionally, 169 bp and 96 bp as ff homozygote and three bands ((265 bp, 169 bp, and 96 bp) were observed in the heterozygote. As per our finding, we report a significantly low frequency of susceptible genotypes in Ff (27.4%) and ff (6.6%) compared to average frequency Ff = 41.80% and ff = 8.25% of India. We also reported here the low frequency of mutant allele f in India's central part, i.e., Bhopal division, Madhya Pradesh. Considering our finding, the mutant allele's low frequency in central India, Madhya Pradesh, shows a negligible contribution of Fok I VDR polymorphism in TB prevalence.

Conclusions

In a comparative analysis with the Northern and Southern India population based on previous reports, the involvement of FoK I polymorphism in the VDR gene was non-significant in Central India. All the studied populations were found in Hardy-Weinberg equilibrium except North India for the Fok1 VDR genotypes.