Longevity & AgingPartial Reprogramming Helps Heart Cells Divide After Heart Attack in Mice
Heart attacks kill cardiac muscle cells that adult hearts cannot replace, leading to scar tissue and eventual heart failure. A new mouse study found that partial reprogramming using three Yamanaka factors — OCT4, SOX2, and KLF4 (OSK) — helped heart muscle cells dismantle their rigid internal structures and successfully complete cell division. Unlike full four-factor reprogramming, OSK did not cause runaway cell growth or pre-cancerous behavior. Delivered via a targeted virus in living mice, OSK reduced heart damage after simulated heart attacks. While still early-stage animal research, this approach points toward a potential regenerative therapy that sidesteps the cancer risks associated with full cellular reprogramming.
