There is no drug that can regenerate cartilage. There is no injection that can reverse osteoarthritis. Joint replacement — with all its surgical risk, recovery time, and limited lifespan — is the end of the road for most patients. A study published June 12, 2026, in the journal Science by researchers at Stanford Medicine aims to change all of that.
The study found that blocking a single aging-related protein — called 15-PGDH — restored lost cartilage in the knee joints of old mice, prevented arthritis from developing after joint injuries, and triggered cartilage regeneration in human tissue samples that had already progressed to joint replacement surgery. If the approach translates to humans, it could represent the first biological treatment capable of not just managing osteoarthritis but reversing it.
