%0 Journal Article %T Environmental Risk Factors for Multiple Sclerosis: A Review with a Focus on Molecular Mechanisms %A Cullen O¡¯Gorman %A Robyn Lucas %A Bruce Taylor %J International Journal of Molecular Sciences %D 2012 %I MDPI AG %R 10.3390/ijms130911718 %X Multiple sclerosis (MS) is a chronic disabling disease of the central nervous system commonly affecting young adults. Pathologically, there are patches of inflammation (plaques) with demyelination of axons and oligodendrocyte loss. There is a global latitude gradient in MS prevalence, and incidence of MS is increasing (particularly in females). These changes suggest a major role for environmental factors in causation of disease. We have reviewed the evidence and potential mechanisms of action for three exposures: vitamin D, Epstein Barr virus and cigarette smoking. Recent advances supporting gene-environment interactions are reviewed. Further research is needed to establish mechanisms of causality in humans and to explore preventative strategies. %K multiple sclerosis %K demyelination %K epidemiology %K latitude %K vitamin D %K Epstein-Barr virus %K smoking %K gene-environment interaction %U http://www.mdpi.com/1422-0067/13/9/11718