Longevity & AgingPIEZO1 Force-Sensing Channel Found Essential for Placental Fusion and Fetal Survival
Researchers at Duke University discovered that PIEZO1, a force-sensing ion channel best known for its role in blood vessel development, is also expressed in placental trophoblast cells where it plays an indispensable role in syncytiotrophoblast formation. When PIEZO1 was deleted specifically in mouse trophoblasts, nearly all embryos died in utero — not from vascular defects, but from failure of trophoblast cell fusion. Mechanistically, PIEZO1-mediated calcium influx activates the TMEM16F lipid scramblase, which moves phosphatidylserine to the outer membrane leaflet, signaling neighboring cells to fuse. These findings identify a new mechanotransduction pathway governing placental development.
