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Cited 239 time in webofscience Cited 244 time in scopus
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MYC and MCL1 Cooperatively Promote Chemotherapy-Resistant Breast Cancer Stem Cells via Regulation of Mitochondrial Oxidative Phosphorylation

Authors
Lee, Kyung minGiltnane, Jennifer M.Balko, Justin M.Schwarz, Luis J.Guerrero-Zotano, Angel L.Hutchinson, Katherine E.Nixon, Mellissa J.Estrada, Monica V.Sanchez, VioletaSanders, Melinda E.Lee, TaekyuGomez, HenryLluch, AnaPerez-Fidalgo, AlejandroWolf, Melissa MagdaleneAndrejeva, GabrielaRathmell, Jeffrey C.Fesik, Stephen WArteaga, Carlos L.
Issue Date
Oct-2017
Publisher
CELL PRESS
Keywords
cancer stem cell; chemotherapy resistance; MCL1; mitochondrial respiration; MYC; triple negative breast cancer
Citation
CELL METABOLISM, v.26, no.4, pp.633 - 647
Indexed
SCIE
SCOPUS
Journal Title
CELL METABOLISM
Volume
26
Number
4
Start Page
633
End Page
647
URI
https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/142831
DOI
10.1016/j.cmet.2017.09.009
ISSN
1550-4131
Abstract
Most patients with advanced triple-negative breast cancer (TNBC) develop drug resistance. MYC and MCL1 are frequently co-amplified in drug-resistant TNBC after neoadjuvant chemotherapy. Herein, we demonstrate that MYC and MCL1 cooperate in the maintenance of chemotherapy-resistant cancer stem cells (CSCs) in TNBC. MYC and MCL1 increased mitochondrial oxidative phosphorylation (mtOXPHOS) and the generation of reactive oxygen species (ROS), processes involved in maintenance of CSCs. A mutant of MCL1 that cannot localize in mitochondria reduced mtOXPHOS, ROS levels, and drug-resistant CSCs without affecting the antiapoptotic function of MCL1. Increased levels of ROS, a by-product of activated mtOXPHOS, led to the accumulation of HIF-1 alpha. Pharmacological inhibition of HIF-1 alpha attenuated CSC enrichment and tumor initiation in vivo. These data suggest that (1) MYC and MCL1 confer resistance to chemotherapy by expanding CSCs via mtOXPHOS and (2) targeting mitochondrial respiration and HIF-1 alpha may reverse chemotherapy resistance in TNBC.
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