Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
Date (from‐to) : 2013/04 -2015/03
Author : KEIKO Kono
Cellular wound-healing, enabling the repair of plasma membrane damage, is frequent in nature. Despite its ubiquitous usage, the underlying molecular mechanisms are poorly understood. Here we report a genome-wide screen to identify biological processes required for cellular wound-healing in yeast. 109 out of 6,032 mutations screened exhibited cellular wounding-specific lethality. Based on the screen, we uncovered a previously unappreciated link between cellular wound-healing and replicative aging: senescence determined by the number of cell division. Plasma membrane damage and subsequent damage repair promoted reorganization of phospholipids near the damage site. The plasma membrane reorganization accelerated replicative aging. Thus, we propose that cellular wound-healing mediated PS exposure on the plasma membrane outer leaflet is an evolutionary conserved mechanism promoting cellular senescence in eukaryotes.