Mitochondria-targeted drugs synergize with 2-deoxyglucose to trigger breast cancer cell death.

Academic Article

Abstract

  • Cancer cells are long known to exhibit increased aerobic glycolysis, but glycolytic inhibition has not offered a viable chemotherapeutic strategy in part because of the systemic toxicity of antiglycolytic agents. However, recent studies suggest that a combined inhibition of glycolysis and mitochondrial function may help overcome this issue. In this study, we investigated the chemotherapeutic efficacies of mitochondria-targeted drugs (MTD) in combination with 2-deoxy-d-glucose (2-DG), a compound that inhibits glycolysis. Using the MTDs, termed Mito-CP and Mito-Q, we evaluated relative cytotoxic effects and mitochondrial bioenergetic changes in vitro. Interestingly, both Mito-CP and Mito-Q synergized with 2-DG to decrease ATP levels in two cell lines. However, with time, the cellular bioenergetic function and clonogenic survival were largely restored in some cells. In a xenograft model of human breast cancer, combined treatment of Mito-CP and 2-DG led to significant tumor regression in the absence of significant morphologic changes in kidney, liver, or heart. Collectively, our findings suggest that dual targeting of mitochondrial bioenergetic metabolism with MTDs and glycolytic inhibitors such as 2-DG may offer a promising chemotherapeutic strategy.
  • Published In

  • Cancer Research  Journal
  • Keywords

  • Animals, Antimetabolites, Antineoplastic Combined Chemotherapy Protocols, Breast Neoplasms, Cell Death, Cell Line, Tumor, Cell Proliferation, Cyclic N-Oxides, Deoxyglucose, Drug Synergism, Female, Glycolysis, Humans, Mice, Mitochondria, Organophosphorus Compounds, Ubiquinone, Xenograft Model Antitumor Assays
  • Digital Object Identifier (doi)

    Author List

  • Cheng G; Zielonka J; Dranka BP; McAllister D; Mackinnon AC; Joseph J; Kalyanaraman B
  • Start Page

  • 2634
  • End Page

  • 2644
  • Volume

  • 72
  • Issue

  • 10