Senescent cells perturb intestinal stem cell differentiation through Ptk7 induced noncanonical Wnt and YAP signaling

Cellular senescence and associated secretory phenotype (SASP) are thought to contribute to aging and tissue dysfunction, though it is unclear how SASP impacts regeneration. Here the authors show that SASP factors impair regeneration, and that Ptk7 is a key secreted protein mediating that dysregulation.