Longevity & Aging

Boosting miR-330 Could Shield Joints from Wear-and-Tear Arthritis

Researchers have found that a small regulatory molecule called miR-330 plays a critical role in protecting joints from arthritis caused by heavy physical stress. In people with jaw osteoarthritis and in animal models, miR-330 levels were significantly lower than in healthy controls. Mice engineered to lack miR-330 developed weaker bones, fewer cartilage-generating cells, and more severe arthritis under load. When scientists used a gene therapy approach to increase miR-330 in rats, it reduced inflammation, slowed cartilage breakdown, and curbed destructive bone cell activity. The findings point toward a potential therapeutic target for preventing or treating load-induced osteoarthritis, a condition that disproportionately affects manual laborers and physically active individuals.