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The genetic aspects of multiple sclerosis.


ABSTRACT: THE EPIDEMIOLOGY OF MULTIPLE SCLEROSIS HAS BEEN EXTENSIVELY INVESTIGATED AND TWO FEATURES HAVE CONSISTENTLY EMERGED: marked geographical variation in prevalence and substantial familial clustering. At first sight, geographic variation would seem to imply an environmental cause for the disease, while familial clustering would seem to suggest that genetic factors have the predominant etiological effect. However, given that geographic variation in prevalence could result from variation in the frequency of genetic risk alleles and that familial clustering might result from shared environmental exposure rather than shared genetic risk alleles, it is clear that these crude inferences are unreliable. Epidemiologists have been resourceful in their attempts to resolve this apparent conflict between "nurture and nature" and have employed a whole variety of sophisticated methods to try and untangle the etiology of multiple sclerosis. The body of evidence that has emerged from these efforts has formed the foundation for decades of research seeking to identify relevant genes and this is the obvious place to start any consideration of the genetics of multiple sclerosis.

SUBMITTER: Sawcer S 

PROVIDER: S-EPMC2824946 | biostudies-literature | 2009 Oct

REPOSITORIES: biostudies-literature

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The genetic aspects of multiple sclerosis.

Sawcer Stephen S  

Annals of Indian Academy of Neurology 20091001 4


THE EPIDEMIOLOGY OF MULTIPLE SCLEROSIS HAS BEEN EXTENSIVELY INVESTIGATED AND TWO FEATURES HAVE CONSISTENTLY EMERGED: marked geographical variation in prevalence and substantial familial clustering. At first sight, geographic variation would seem to imply an environmental cause for the disease, while familial clustering would seem to suggest that genetic factors have the predominant etiological effect. However, given that geographic variation in prevalence could result from variation in the frequ  ...[more]

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