Longevity & Aging

Targeting Traf6 Reverses Bone Loss by Rebalancing Inflammation in Aging Stem Cells

Researchers identified that the protein Traf6 drives inflammatory senescence in bone marrow stromal stem cells (BMSCs) by suppressing the antioxidant regulator Nrf2 and activating the Nlrp3 inflammasome. Using high-throughput sequencing, they found these pathways were significantly dysregulated in 18-month-old mice versus young mice. Lentiviral knockdown of Traf6 in vitro reduced inflammation, oxidative stress, and cellular senescence markers while restoring osteogenic function. In vivo, intramedullary Traf6 knockdown in aging mice increased bone volume, reduced Nlrp3-driven inflammation, and accelerated new bone formation. These findings establish the Traf6–Nrf2–Nlrp3 axis as a mechanistic driver of age-related bone loss and a promising therapeutic target for senile osteoporosis.