Control of signaling-mediated clearance of apoptotic cells by the tumor suppressor p53

Kyoung Wan Yoon, Sanguine Byun, Eunjeong Kwon, So Young Hwang, Kiki Chu, Masatsugu Hiraki, Seung Hee Jo, Astrid Weins, Samy Hakroush, Angelika Cebulla, David B. Sykes, Anna Greka, Peter Mundel, David E. Fisher, Anna Mandinova, Sam W. Lee

Research output: Contribution to journalArticlepeer-review

140 Citations (Scopus)


The inefficient clearance of dying cells can lead to abnormal immune responses, such as unresolved inflammation and autoimmune conditions.We show that tumor suppressor p53 controls signaling-mediated phagocytosis of apoptotic cells through its target, Death Domain1a (DD1a), which suggests that p53 promotes both the proapoptotic pathway and postapoptotic events. DD1a appears to function as an engulfment ligand or receptor that engages in homophilic intermolecular interaction at intercellular junctions of apoptotic cells and macrophages, unlike other typical scavenger receptors that recognize phosphatidylserine on the surface of dead cells. DD1a-deficient mice showed in vivo defects in clearing dying cells, which led to multiple organ damage indicative of immune dysfunction. p53-induced expression of DD1a thus prevents persistence of cell corpses and ensures efficient generation of precise immune responses.

Original languageEnglish
Article number1261669
Issue number6247
Publication statusPublished - 2015 Jul 31

All Science Journal Classification (ASJC) codes

  • General


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