HormonesStatins May Help Build Bone After Menopause Through a Stem Cell Pathway
Menopause drops estrogen and drives bone loss, and hormone therapy isn't an option for every woman. This Nature Aging study found that postmenopausal women taking statins lost bone density more slowly than non-users in two hospital cohorts. A different cholesterol drug, evolocumab, showed no such benefit, so the effect isn't about lowering LDL. In mice, atorvastatin built new bone only when estrogen was low, not in young mice or males. It works on bone marrow stem cells that carry the leptin receptor (LEPR+). Estrogen turns on a bone-building growth factor called osteolectin in these cells. Statins reach the same factor by a separate route, leaving the protein RAC1 more active. The findings suggest statins may partly stand in for lost estrogen signaling in bone, but human evidence so far is observational.
