The objective of this study was to investigate genes involved in the metabo
lism and function of vitamin D as candidate genes for genetic susceptibilit
y to MS. Restriction fragment length polymorphisms and highly polymorphic m
icrosatellite markers within or very close to the 1,25(OH)(2)D-3 receptor (
VDR) [12q14], the vitamin D binding protein (DBP) [4q12], and the 25(OH)D-3
1 alpha-hydroxylase [12q13] loci were analyzed for linkage or association
with MS. We found no evidence for linkage or association of these candidate
genes with MS in the Canadian population.