1198-Senescence States and Brain-Barrier Development

Paper Talk · Jun 28, 2026 · 20m

This research identifies a specialized class of p21+ senescent cells that are essential for the healthy development of brain-barrier systems in mice. Unlike the traditional view of senescence as a purely pathological state, these cells appear during mid-gestation to coordinate the formation of the blood-brain barrier and the blood-cerebrospinal fluid barrier. The study distinguishes between transient senescence in vascular endothelial cells and macrophages—which temporary guide vessel patterning through inflammatory signaling—and persistent senescence in the choroid plexus. These epithelial…