Vitamin D Receptor Polymorphisms Among the Turkish Population are Associated with Multiple Sclerosis

Area of Science:

• Genetics
• Neurology
• Immunology

Background:

• Multiple sclerosis (MS) is a central nervous system inflammatory disease involving demyelination and axonal degeneration.
• Genetic factors, including vitamin D receptor (VDR) gene polymorphisms, are investigated for their role in MS susceptibility.
• The VDR gene plays a crucial role in immune system regulation and calcium metabolism, potentially influencing MS pathogenesis.

Purpose of the Study:

• To investigate the association between VDR gene polymorphisms (Fok-I, Bsm-I, and Taq-I) and the risk of multiple sclerosis in the Turkish population.
• To analyze the relationship between specific VDR genotypes and alleles and MS susceptibility.

Main Methods:

• A case-control study involving 271 MS patients and 203 healthy controls from the Turkish population.
• Genomic DNA extraction followed by polymerase chain reaction (PCR) amplification of VDR gene Fok-I, Bsm-I, and Taq-I regions.
• Genotyping was performed by PCR product digestion and analysis of fragment sizes.

Main Results:

• Significant associations were found between MS and the VDR gene Fok-I T/T genotype (dominant model) and T allele frequency.
• Significant associations were also observed between MS and the VDR gene Taq-I C/C genotype (dominant model) and C allele frequency.
• No significant association was detected between MS and VDR gene Bsm-I polymorphisms in terms of genotype distribution or allele frequency.

Conclusions:

• VDR gene Fok-I and Taq-I polymorphisms are significantly associated with multiple sclerosis in the Turkish population.
• These findings suggest that specific VDR gene variants may contribute to MS susceptibility in this ethnic group.
• The VDR gene Bsm-I polymorphism does not appear to be associated with MS risk in the studied Turkish cohort.