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Getting the latest healthcare news for you
Getting the latest healthcare news for you
Researchers at Kyoto University have identified a protein interaction — between PGAM1 and Chk1 — that may help senescent ("zombie") cells survive longer than they should. These lingering cells are linked to aging, chronic inflammation, and tissue damage. A compound called Nutlin 3b showed promise in selectively clearing these cells in animal models, though human applications remain a long way off.
As we age, so-called "zombie cells" — cells that stop dividing but refuse to die — accumulate in our bodies and drive chronic inflammation and tissue dysfunction. A new Mini Review published in Geromedicine by Kyoto University researchers sheds light on why some of these senescent cells are so hard to eliminate, and points to a potential strategy for clearing them more selectively.
The key players are two proteins: phosphoglycerate mutase 1 (PGAM1) and checkpoint kinase 1 (Chk1). Their interaction appears to ramp up in senescent cells, fueling a unique metabolic state the authors call a "pseudo-Warburg effect." This interaction also stabilizes a transcription factor that activates DNA-repair and cell-survival programs — essentially giving these cells the tools they need to persist under stress.
The review highlights Nutlin 3b, a compound that disrupted this protein interaction and selectively cleared senescent cells in lab and animal models, even improving age-related dysfunction and reducing lung fibrosis in older mice — all with an acceptable safety profile.
Key Takeaways:
Why it matters: Senescent cells are increasingly recognized as drivers of aging and age-related disease. Identifying a targetable mechanism for selectively removing them — without harming healthy cells — could open new doors in treating conditions from fibrosis to chronic inflammation.
