Stanford Researchers Discover Cartilage Regeneration Method

Researchers at Stanford Medicine have uncovered a potential breakthrough in treating joint degeneration by targeting the restoration of cartilage damaged by aging or physical trauma. The team focused on inhibiting 15-PGDH, an enzyme and protein whose levels naturally rise as mammals age.

Osteoarthritis occurs when the cartilage acting as a protective cushion in joints gradually wears down, causing bones to grind against each other, leading to severe pain, swelling, and mobility issues. Because natural cartilage lacks the ability to easily self-repair, current medical treatments are largely limited to pain management or total joint replacement surgeries.

Stock photo for illustration only, not from the actual event

The study revealed that older mice possessed approximately twice the amount of 15-PGDH protein in their knee joints compared to younger mice. Researchers then administered a small-molecule drug to inhibit this protein via systemic injections and direct knee injections. The results demonstrated that knee cartilage in the mice grew significantly thicker, returning close to normal joint conditions by stimulating existing chondrocytes rather than relying on stem cells.

Furthermore, the research team tested the method on mice with injuries similar to human anterior cruciate ligament (ACL) tears, which typically carry a high risk of subsequent osteoarthritis. By administering the protein-inhibiting drug twice a week for four weeks post-injury, treated mice showed a substantially lower likelihood of developing osteoarthritis and were able to bear weight and walk much closer to normal patterns.