title: Growth signaling at the nexus of stem cell life and death.
abstract: Stress can activate tumor-suppressive mechanisms, causing the loss of adult stem cell function with age. In this issue of Cell Stem Cell and in Nature, Castilho et al. (2009) and Harrison et al. (2009) highlight the importance of mTOR signaling in stem cell exhaustion and mammalian aging, respectively.
authors.affiliation: Whitehead Institute for Biomedical Research, Nine Cambridge Center, Cambridge, MA 02142, USA.
authors.forename: Kris C
authors.initials: KC
authors.lastname: Wood
authors.forename: David M
authors.initials: DM
authors.lastname: Sabatini
mesh_terms: D000818:Animals; D016923:Cell Death; D049109:Cell Proliferation; D016922:Cellular Senescence; D018859:Hair Follicle / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D051379:Mice; D008954:Models, Biological; D011494:Protein Kinases / Q000378:metabolism; D015398:Signal Transduction; D013234:Stem Cells / Q000166:cytology* / Q000378:metabolism*; D058570:TOR Serine-Threonine Kinases; D051153:Wnt Proteins / Q000378:metabolism; D051176:beta Catenin / Q000378:metabolism
chemical_list: D051153:Wnt Proteins; D051176:beta Catenin; D011494:Protein Kinases; C546843:mTOR protein, mouse; D058570:TOR Serine-Threonine Kinases