Blocking an Aging Enzyme Reawakens Cartilage Regeneration Without Stem Cells

Researchers inhibited the aging-associated enzyme 15-PGDH in mice, thickening previously thinned cartilage and shifting local cells toward healthier cartilage formation; early tests on human osteoarthritic cartilage showed reduced enzyme activity and initial signs of matrix rebuilding, suggesting a potential upstream therapy for cartilage loss that doesn’t rely on stem cells.