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Vitamin D as a protective factor in multiple sclerosis.

Abstract

OBJECTIVE

To examine the association between 25-hydroxyvitamin D (25[OH]D) levels and the risk of multiple sclerosis (MS) in blood samples collected prospectively and during gestation.

METHODS

In this nested case-control study, 2 population-based biobanks with 291,500 samples from 164,000 persons collected since 1975 in the northern half of Sweden were used. We identified prospectively collected blood samples from MS cases (n = 192, controls matched 2:1) and gestational samples from pregnant mothers where the offspring had later developed MS (n = 37, control mothers matched 5:1). 25(OH)D levels were measured using an ELISA, and the risk of MS was analyzed using matched logistic regression.

RESULTS

Levels of 25(OH)D ≥75 (vs <75) nmol/L in prospectively collected blood samples were associated with a decreased risk of MS (odds ratio [OR] 0.39, 95% confidence interval [CI] 0.16-0.98). No decrease in MS risk was found in the offspring exposed to gestational 25(OH)D levels ≥75 (vs <75) nmol/L (OR 1.8, 95% CI 0.53-5.8). The prevalence of 25(OH)D levels ≥75 nmol/L in female controls decreased gradually during 1976-2005 (p trend = 0.005).

CONCLUSION

This study supports the presence of an association between high 25(OH)D levels during the years preceding disease onset and a decreased risk of MS. In the very limited material with samples drawn in early pregnancy, where month-of-birth effects were controlled for, we found no association between gestational 25(OH)D levels and MS risk in the offspring. Decreasing 25(OH)D levels in the population may contribute to explain the increasing MS incidence that is suggested from epidemiologic studies.

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  • Authors+Show Affiliations

    ,

    Department of Pharmacology and Clinical Neuroscience, Section of Neurology, Umeå University, Umeå, Sweden. jonatan.salzer@neuro.umu.se

    , , , ,

    Source

    Neurology 79:21 2012 Nov 20 pg 2140-5

    MeSH

    Adolescent
    Adult
    Aged
    Biomarkers
    Case-Control Studies
    Cohort Studies
    Female
    Humans
    Middle Aged
    Multiple Sclerosis
    Neuroprotective Agents
    Pregnancy
    Prospective Studies
    Sweden
    Vitamin D
    Young Adult

    Pub Type(s)

    Journal Article
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    23170011

    Citation

    Salzer, Jonatan, et al. "Vitamin D as a Protective Factor in Multiple Sclerosis." Neurology, vol. 79, no. 21, 2012, pp. 2140-5.
    Salzer J, Hallmans G, Nyström M, et al. Vitamin D as a protective factor in multiple sclerosis. Neurology. 2012;79(21):2140-5.
    Salzer, J., Hallmans, G., Nyström, M., Stenlund, H., Wadell, G., & Sundström, P. (2012). Vitamin D as a protective factor in multiple sclerosis. Neurology, 79(21), pp. 2140-5. doi:10.1212/WNL.0b013e3182752ea8.
    Salzer J, et al. Vitamin D as a Protective Factor in Multiple Sclerosis. Neurology. 2012 Nov 20;79(21):2140-5. PubMed PMID: 23170011.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Vitamin D as a protective factor in multiple sclerosis. AU - Salzer,Jonatan, AU - Hallmans,Göran, AU - Nyström,Maria, AU - Stenlund,Hans, AU - Wadell,Göran, AU - Sundström,Peter, PY - 2012/11/22/entrez PY - 2012/11/22/pubmed PY - 2013/1/19/medline SP - 2140 EP - 5 JF - Neurology JO - Neurology VL - 79 IS - 21 N2 - OBJECTIVE: To examine the association between 25-hydroxyvitamin D (25[OH]D) levels and the risk of multiple sclerosis (MS) in blood samples collected prospectively and during gestation. METHODS: In this nested case-control study, 2 population-based biobanks with 291,500 samples from 164,000 persons collected since 1975 in the northern half of Sweden were used. We identified prospectively collected blood samples from MS cases (n = 192, controls matched 2:1) and gestational samples from pregnant mothers where the offspring had later developed MS (n = 37, control mothers matched 5:1). 25(OH)D levels were measured using an ELISA, and the risk of MS was analyzed using matched logistic regression. RESULTS: Levels of 25(OH)D ≥75 (vs <75) nmol/L in prospectively collected blood samples were associated with a decreased risk of MS (odds ratio [OR] 0.39, 95% confidence interval [CI] 0.16-0.98). No decrease in MS risk was found in the offspring exposed to gestational 25(OH)D levels ≥75 (vs <75) nmol/L (OR 1.8, 95% CI 0.53-5.8). The prevalence of 25(OH)D levels ≥75 nmol/L in female controls decreased gradually during 1976-2005 (p trend = 0.005). CONCLUSION: This study supports the presence of an association between high 25(OH)D levels during the years preceding disease onset and a decreased risk of MS. In the very limited material with samples drawn in early pregnancy, where month-of-birth effects were controlled for, we found no association between gestational 25(OH)D levels and MS risk in the offspring. Decreasing 25(OH)D levels in the population may contribute to explain the increasing MS incidence that is suggested from epidemiologic studies. SN - 1526-632X UR - https://www.unboundmedicine.com/medline/citation/23170011/full_citation L2 - http://www.neurology.org/cgi/pmidlookup?view=long&amp;pmid=23170011 DB - PRIME DP - Unbound Medicine ER -