Journal
GENERAL PHYSIOLOGY AND BIOPHYSICS
Volume 32, Issue 4, Pages 459-466Publisher
GENERAL PHYSIOL AND BIOPHYSICS
DOI: 10.4149/gpb_2013067
Keywords
Multiple sclerosis risk; Genetic variants; Vitamin D deficiency; Vitamin D supplementation
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Funding
- [APVV-0028-10]
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Recent findings suggest that polymorphisms in vitamin D pathway genes are candidates for association with multiple sclerosis susceptibility. It has been now well demonstrated that vitamin D has immunomodulatory functions that may be favorable for reduction of multiple sclerosis risk. Current research has been focused on identification of new variants of genes involved in vitamin D pathway, namely in vitamin D receptor and enzymes of vitamin D metabolism. These variants have been intensively studied as possible genetic predictors of both vitamin D levels and the risk of multiple sclerosis. Considering the findings available up-to-date, we may recognize two groups of genetic variants. The first group of genes was found to predict vitamin D levels but not the risk of multiple sclerosis. The second group of genetic variants is represented by promising genes predicting vitamin D levels as well as the risk of multiple sclerosis. A strong association with increased risk of the disease has been observed for a rare variant in the CYP27B1 gene encoding a vitamin D-activating enzyme. Observed interaction between genetic and epidemiological findings brings the rationale for supplementation trials of vitamin D. Although promising effects of vitamin D supplementation have emerged, the results obtained so far are inconclusive and the real therapeutic significance of vitamin D supplementation remains to be elucidated.
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