Co‐targeting BET and MEK as salvage therapy for MAPK and checkpoint inhibitor‐resistant melanoma

Autor: Ileabett M Echevarría‐Vargas, Patricia I Reyes‐Uribe, Adam N Guterres, Xiangfan Yin, Andrew V Kossenkov, Qin Liu, Gao Zhang, Clemens Krepler, Chaoran Cheng, Zhi Wei, Rajasekharan Somasundaram, Giorgos Karakousis, Wei Xu, Jennifer JD Morrissette, Yiling Lu, Gordon B Mills, Ryan J Sullivan, Miao Benchun, Dennie T Frederick, Genevieve Boland, Keith T Flaherty, Ashani T Weeraratna, Meenhard Herlyn, Ravi Amaravadi, Lynn M Schuchter, Christin E Burd, Andrew E Aplin, Xiaowei Xu, Jessie Villanueva
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: EMBO Molecular Medicine, Vol 10, Iss 5, Pp 1-15 (2018)
Druh dokumentu: article
ISSN: 1757-4676
1757-4684
DOI: 10.15252/emmm.201708446
Popis: Abstract Despite novel therapies for melanoma, drug resistance remains a significant hurdle to achieving optimal responses. NRAS‐mutant melanoma is an archetype of therapeutic challenges in the field, which we used to test drug combinations to avert drug resistance. We show that BET proteins are overexpressed in NRAS‐mutant melanoma and that high levels of the BET family member BRD4 are associated with poor patient survival. Combining BET and MEK inhibitors synergistically curbed the growth of NRAS‐mutant melanoma and prolonged the survival of mice bearing tumors refractory to MAPK inhibitors and immunotherapy. Transcriptomic and proteomic analysis revealed that combining BET and MEK inhibitors mitigates a MAPK and checkpoint inhibitor resistance transcriptional signature, downregulates the transcription factor TCF19, and induces apoptosis. Our studies demonstrate that co‐targeting MEK and BET can offset therapy resistance, offering a salvage strategy for melanomas with no other therapeutic options, and possibly other treatment‐resistant tumor types.
Databáze: Directory of Open Access Journals
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