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TAK1 activates AMPK-dependent cytoprotective autophagy in TRAIL-treated epithelial cells

AutorHerrero Martín, Griselda ; Høyer-Hansen, Maria; García-García, Celina ; Fumarola, Claudia; Farkas, Thomas; López-Rivas, Abelardo ; Jäättelä, Marja
Palabras claveAutophagy
Cancer
Cell death
Signalling
TRAIL
Fecha de publicación18-mar-2009
EditorEuropean Molecular Biology Organization
CitaciónEMBO Journal 28(6): 677-685 (2009)
ResumenThe capacity of tumour necrosis factor-related apoptosis-inducing ligand (TRAIL) to trigger apoptosis preferentially in cancer cells, although sparing normal cells, has motivated clinical development of TRAIL receptor agonists as anti-cancer therapeutics. The molecular mechanisms responsible for the differential TRAIL sensitivity of normal and cancer cells are, however, poorly understood. Here, we show a novel signalling pathway that activates cytoprotective autophagy in untransformed human epithelial cells treated with TRAIL. TRAIL-induced autophagy is mediated by the AMP-activated protein kinase (AMPK) that inhibits mammalian target of rapamycin complex 1, a potent inhibitor of autophagy. Interestingly, the TRAIL-induced AMPK activation is refractory to the depletion of the two known AMPK-activating kinases, LKB1 and Ca(2+)/calmodulin-dependent kinase kinase-β, but depends on transforming growth factor-β-activating kinase 1 (TAK1) and TAK1-binding subunit 2. As TAK1 and AMPK are ubiquitously expressed kinases activated by numerous cytokines and developmental cues, these data are most likely to have broad implications for our understanding of cellular control of energy homoeostasis as well as the resistance of untransformed cells against TRAIL-induced apoptosis. © 2009 European Molecular Biology Organization | All Rights Reserved.
URIhttp://hdl.handle.net/10261/52514
DOI10.1038/emboj.2009.8
Identificadoresdoi: 10.1038/emboj.2009.8
issn: 0261-4189
ReferenciasPMC2666037
PMID: 19197243
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