Abstract:
:Activating mutations in BRAF are the most common genetic alterations in melanoma. Inhibition of BRAF by small molecules leads to cell-cycle arrest and apoptosis. We show here that BRAF inhibition also induces an oxidative phosphorylation gene program, mitochondrial biogenesis, and the increased expression of the mitochondrial master regulator, PGC1α. We further show that a target of BRAF, the melanocyte lineage factor MITF, directly regulates the expression of PGC1α. Melanomas with activation of the BRAF/MAPK pathway have suppressed levels of MITF and PGC1α and decreased oxidative metabolism. Conversely, treatment of BRAF-mutated melanomas with BRAF inhibitors renders them addicted to oxidative phosphorylation. Our data thus identify an adaptive metabolic program that limits the efficacy of BRAF inhibitors.
journal_name
Cancer Celljournal_title
Cancer cellauthors
Haq R,Shoag J,Andreu-Perez P,Yokoyama S,Edelman H,Rowe GC,Frederick DT,Hurley AD,Nellore A,Kung AL,Wargo JA,Song JS,Fisher DE,Arany Z,Widlund HRdoi
10.1016/j.ccr.2013.02.003subject
Has Abstractpub_date
2013-03-18 00:00:00pages
302-15issue
3eissn
1535-6108issn
1878-3686pii
S1535-6108(13)00067-6journal_volume
23pub_type
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