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Mitochondrial ATP fuels ABC transporter-mediated drug efflux in cancer chemoresistance (part-II)

ABSTRACT: Chemotherapy remains the standard of care for most cancers worldwide, however development of chemoresistance due to the presence of the drug-effluxing ABC transporters remains a significant problem. The development of safe and effective means to overcome chemoresistance is critical for achieving durable remissions in many cancer patients. We have investigated the energetic demands of ABC transporters in the context of the metabolic adaptations of chemoresistant cancer cells. Here we show that ABC transporters use mitochondrial-derived ATP as a source of energy to efflux drugs out of cancer cells. We further demonstrate that the loss of MCJ (DnaJC15), an endogenous negative regulator of mitochondrial respiration, in chemoresistant cancer cells boosts their ability to produce ATP from mitochondria and fuel ABC transporters. We have developed novel MCJ mimetics that can attenuate mitochondrial respiration and safely overcome chemoresistance in vitro and in vivo. Administration of MCJ mimetics in combination with standard chemotherapeutic drugs could therefore become an new strategy for treatment of multiple cancers.

ORGANISM(S): Human Homo Sapiens

TISSUE(S): Cultured Cells

DISEASE(S): Cancer

SUBMITTER: Rachel Culp-Hill

PROVIDER: ST001731 | MetabolomicsWorkbench | Thu Mar 18 00:00:00 GMT 2021

REPOSITORIES: MetabolomicsWorkbench

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