Variations of SOST mRNA expression in human bone are associated with DNA polymorphism and DNA methylation in the SOST gene.

SOST encodes sclerostin, an inhibitor of bone formation that antagonizes canonical Wnt signaling. Variations of SOST expression have an impact on bone mineral density (BMD) and bone strength. We hypothesized that genetic and epigenetic DNA modifications have an impact on SOST gene expression.