Overcoming intrinsic multi-drug resistance in melanoma by blocking the mitochondrial respiratory chain of slow-cycling JARID1Bhigh cells

By A. Roesch, A. Vultur, I. Bogeski, Huang Wang, Katharina M Zimmermann, D. Speicher, C. Körbel, M. Laschke, P. Gimotty, S. Philipp and 9 more. Cancer Cell, 2013

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Summary Despite success with BRAFV600E–inhibitors, therapeutic responses in patients with metastatic melanoma are short-lived because of the acquisition of drug resistance. We identified a mechanism of intrinsic multi-drug resistance based on the survival of a tumor cell subpopulation. Treatment with various drugs, including cisplatin and vemurafenib, uniformly leads to enrichment of slow-cycling, long-term tumor-maintaining melanoma cells expressing the H3K4-demethylase JARID1B/KDM5B/PLU-1. Proteome-profiling revealed an upregulation in enzymes of mitochondrial oxidative-ATP-synthesis (OXPHOS) in this subpopulation. Inhibition of mitochondrial respiration blocked the emergence of the JARID1Bhigh subpopulation and sensitized melanoma cells to therapy, independent of their genotype. Our findings support a two-tiered approach combining anti-cancer agents that eliminate rapidly proliferating melanoma cells with inhibitors of the drug-resistant slow-cycling subpopulation.

View Paper: https://www.semanticscholar.org/paper/8cb9f4515414a5b015279301679d451c9f0fbf16

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