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Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
Published on: June 21, 2018
Confirmation of association between multiple sclerosis and CYP27B1
Emilie Sundqvist1, Maria Bäärnhielm, Lars Alfredsson
1Neuroimmunology Unit, Department of Clinical Neuroscience, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden. Emilie.Sundqvist@ki.se
European Journal of Human Genetics : EJHG
|July 22, 2010
Summary
This study links genetic variations near the CYP27B1 gene to multiple sclerosis (MS) susceptibility. The findings reinforce the role of vitamin D in MS pathology, suggesting a connection between genetics and environmental factors.
Area of Science:
- Genetics
- Immunology
- Endocrinology
Background:
- Multiple sclerosis (MS) is a complex inflammatory central nervous system disease influenced by genetic and environmental factors.
- Vitamin D deficiency is implicated in MS and other autoimmune diseases, with lower 25-hydroxyvitamin D3 (25-OHD(3)) levels observed in patients.
- Bioactive 1,25(OH)(2)D(3), derived from 25-OHD(3) via CYP27B1, modulates immune responses, including T-cell and dendritic cell functions.
Purpose of the Study:
- To investigate the association between genetic variations in the 12q13-14 region and MS susceptibility.
- To evaluate the role of vitamin D metabolism genes in the context of MS genetics.
- To confirm and strengthen the link between vitamin D and MS pathology through genetic association studies.
Main Methods:
- Analysis of single nucleotide polymorphisms (SNPs) in the 12q13-14 chromosomal region in a Swedish cohort (2158 cases, 1759 controls).
- Imputation of rs703842 SNP and joint analysis with previously published data from the Australian and New Zealand Multiple Sclerosis Genetics Consortium (ANZgene).
- Statistical analysis to determine the association between specific SNPs and MS risk, including calculation of odds ratios and confidence intervals.
Main Results:
- Significant associations were found with three SNPs (rs4646536, rs10877012, rs10877015) in the Swedish cohort.
- A highly significant association was confirmed for rs703842 (P=5.1 × 10(-11); OR 0.83; 95% CI 0.79-0.88) in the joint analysis.
- The genetic findings align with the known role of vitamin D in immune regulation and its association with 25-OHD(3) levels.
Conclusions:
- Genetic variations in the 12q13-14 region, particularly rs703842 near CYP27B1, are significantly associated with multiple sclerosis.
- These findings provide further genetic evidence supporting the crucial role of vitamin D in the pathogenesis of MS.
- The study highlights the interplay between genetic predisposition and environmental factors like vitamin D in MS development.
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