PMID- 31439581 OWN - NLM STAT- MEDLINE DCOM- 20200908 LR - 20211204 IS - 1557-3265 (Electronic) IS - 1078-0432 (Print) IS - 1078-0432 (Linking) VI - 25 IP - 21 DP - 2019 Nov 1 TI - A Novel Mitochondrial Inhibitor Blocks MAPK Pathway and Overcomes MAPK Inhibitor Resistance in Melanoma. PG - 6429-6442 LID - 10.1158/1078-0432.CCR-19-0836 [doi] AB - PURPOSE: The purpose of this study is to determine if inhibition of mitochondrial oxidative phosphorylation (OxPhos) is an effective strategy against MAPK pathway inhibitor (MAPKi)-resistant BRAF-mutant melanomas.Experimental Design: The antimelanoma activity of IACS-010759 (OPi), a novel OxPhos complex I inhibitor, was evaluated in vitro and in vivo. Mechanistic studies and predictors of response were evaluated using molecularly and metabolically stratified melanoma cell lines. (13)C-labeling and targeted metabolomics were used to evaluate the effect of OPi on cellular energy utilization. OxPhos inhibition in vivo was evaluated noninvasively by [(18)F]-fluoroazomycin arabinoside (FAZA) PET imaging. RESULTS: OPi potently inhibited OxPhos and the in vivo growth of multiple MAPKi-resistant BRAF-mutant melanoma models with high OxPhos at well-tolerated doses. In vivo tumor regression with single-agent OPi treatment correlated with inhibition of both MAPK and mTOR complex I activity. Unexpectedly, antitumor activity was not improved by combined treatment with MAPKi in vitro or in vivo. Signaling and growth-inhibitory effects were mediated by LKB1-AMPK axis, and proportional to AMPK activation. OPi increased glucose incorporation into glycolysis, inhibited glucose and glutamine incorporation into the mitochondrial tricarboxylic acid cycle, and decreased cellular nucleotide and amino acid pools. Early changes in [(18)F]-FAZA PET uptake in vivo, and the degree of mTORC1 pathway inhibition in vitro, correlated with efficacy. CONCLUSIONS: Targeting OxPhos with OPi has significant antitumor activity in MAPKi-resistant, BRAF-mutant melanomas, and merits further clinical investigation as a potential new strategy to overcome intrinsic and acquired resistance to MAPKi in patients. CI - (c)2019 American Association for Cancer Research. FAU - Vashisht Gopal, Y N AU - Vashisht Gopal YN AD - Department of Melanoma Medical Oncology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. vynanda@mdanderson.org. AD - Department of Translational Molecular Pathology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Gammon, Seth AU - Gammon S AUID- ORCID: 0000-0001-8647-0975 AD - Department of Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Prasad, Rishika AU - Prasad R AD - Department of Melanoma Medical Oncology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Knighton, Barbara AU - Knighton B AD - Department of Melanoma Medical Oncology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Pisaneschi, Federica AU - Pisaneschi F AUID- ORCID: 0000-0002-1989-4417 AD - Department of Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Roszik, Jason AU - Roszik J AUID- ORCID: 0000-0002-4561-6170 AD - Department of Melanoma Medical Oncology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Feng, Ningping AU - Feng N AUID- ORCID: 0000-0003-1917-9648 AD - Center for Co-Clinical Trials, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Johnson, Sarah AU - Johnson S AD - Center for Co-Clinical Trials, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Pramanik, Snigdha AU - Pramanik S AD - Department of Melanoma Medical Oncology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Sudderth, Jessica AU - Sudderth J AD - Children's Medical Research Institute, University of Texas Southwestern Medical Center, Dallas, Texas. FAU - Sui, Dawen AU - Sui D AD - Department of Biostatistics, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Hudgens, Courtney AU - Hudgens C AUID- ORCID: 0000-0001-8312-7485 AD - Department of Translational Molecular Pathology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Fischer, Grant M AU - Fischer GM AD - Department of Melanoma Medical Oncology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. AD - Department of Cancer Biology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Deng, Wanleng AU - Deng W AD - Department of Melanoma Medical Oncology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Reuben, Alexandre AU - Reuben A AUID- ORCID: 0000-0003-4510-0382 AD - Department of Thoracic H&N Medical Oncology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Peng, Weiyi AU - Peng W AUID- ORCID: 0000-0002-7785-6240 AD - Department of Biology and Biochemistry, University of Houston, Houston, Texas. FAU - Wang, Jian AU - Wang J AD - Department of Biostatistics, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - McQuade, Jennifer L AU - McQuade JL AUID- ORCID: 0000-0002-2393-2172 AD - Department of Melanoma Medical Oncology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Tetzlaff, Michael T AU - Tetzlaff MT AUID- ORCID: 0000-0002-0977-0912 AD - Department of Translational Molecular Pathology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. AD - Department of Pathology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Di Francesco, Maria E AU - Di Francesco ME AD - Institute for Applied Cancer Science, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Marszalek, Joe AU - Marszalek J AD - Center for Co-Clinical Trials, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - Piwnica-Worms, David AU - Piwnica-Worms D AD - Department of Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston, Texas. FAU - DeBerardinis, Ralph J AU - DeBerardinis RJ AD - Children's Medical Research Institute, University of Texas Southwestern Medical Center, Dallas, Texas. AD - Howard Hughes Medical Institute, Chevy Chase, Maryland. FAU - Davies, Michael A AU - Davies MA AUID- ORCID: 0000-0002-0977-0912 AD - Department of Melanoma Medical Oncology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. AD - Department of Translational Molecular Pathology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. AD - Department of Systems Biology, University of Texas M.D. Anderson Cancer Center, Houston, Texas. LA - eng GR - P50 CA094056/CA/NCI NIH HHS/United States GR - P30 CA016672/CA/NCI NIH HHS/United States GR - R01 CA231506/CA/NCI NIH HHS/United States GR - UL1 TR000371/TR/NCATS NIH HHS/United States GR - TL1 TR000369/TR/NCATS NIH HHS/United States GR - T32 CA009666/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20190822 PL - United States TA - Clin Cancer Res JT - Clinical cancer research : an official journal of the American Association for Cancer Research JID - 9502500 RN - 0 (IACS-010759) RN - 0 (Oxadiazoles) RN - 0 (Piperidines) RN - 0 (Protein Kinase Inhibitors) RN - EC 2.7.- (Protein Kinases) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.11.1 (BRAF protein, human) RN - EC 2.7.11.1 (Proto-Oncogene Proteins B-raf) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - EC 2.7.11.3 (AMP-Activated Protein Kinase Kinases) SB - IM MH - AMP-Activated Protein Kinase Kinases MH - Animals MH - Cell Line, Tumor MH - Drug Resistance, Neoplasm/drug effects MH - Gene Expression Regulation, Neoplastic/drug effects MH - Heterografts MH - Humans MH - MAP Kinase Signaling System/*drug effects MH - Melanoma/*drug therapy/genetics/pathology MH - Mice MH - Mitochondria/drug effects MH - Oxadiazoles/therapeutic use MH - Oxidative Phosphorylation/*drug effects MH - Piperidines/therapeutic use MH - Positron-Emission Tomography MH - Protein Kinase Inhibitors/*pharmacology/therapeutic use MH - Protein Kinases/genetics MH - Proto-Oncogene Proteins B-raf/genetics MH - TOR Serine-Threonine Kinases/genetics PMC - PMC6825560 MID - NIHMS1537664 COIS- Conflict of Interest Disclosure: Y.N. Vashisht Gopal has a research grant from Calithera Biosciences. M. Tetzlaff is on the advisory board of Myriad Genetics, Seattle Genetics and Novartis. M.A. Davies is a consultant to Nanostring Technologies, and on advisory boards for Novartis, Bristol Myers Squibb, GlaxoSmithKline, Roche-Genentech, Sanofi-Aventis, Vaccinex, and Array Biopharma; and has institutional research grants from Astrazeneca, GlaxoSmithkline, Roche-Genentech, Sanofi-Aventis, Merck, Oncothyreon, and Myriad Genetics. UT M.D. Anderson Cancer Center has a patent on IACS-010759 (OPi). EDAT- 2019/08/24 06:00 MHDA- 2020/09/09 06:00 PMCR- 2020/05/01 CRDT- 2019/08/24 06:00 PHST- 2019/03/12 00:00 [received] PHST- 2019/06/25 00:00 [revised] PHST- 2019/08/09 00:00 [accepted] PHST- 2019/08/24 06:00 [pubmed] PHST- 2020/09/09 06:00 [medline] PHST- 2019/08/24 06:00 [entrez] PHST- 2020/05/01 00:00 [pmc-release] AID - 1078-0432.CCR-19-0836 [pii] AID - 10.1158/1078-0432.CCR-19-0836 [doi] PST - ppublish SO - Clin Cancer Res. 2019 Nov 1;25(21):6429-6442. doi: 10.1158/1078-0432.CCR-19-0836. Epub 2019 Aug 22.