Targeting cancer cells through antibiotics-induced mitochondrial dysfunction requires autophagy inhibition

Milan Esner, Dmitry Graifer, Matilde E. Lleonart, Alex Lyakhovich

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

A significant part of current research studies utilizes various cellular models which imply specific antibiotics-containing media as well as antibiotics used for clonal selection or promoter de/activation. With the great success of developing such tools, mitochondria, once originated from bacteria, can be effectively targeted by antibiotics. For that reason, some studies propose antibiotics-targeting of mitochondria as part of anticancer therapy. Here, we have focused on the effects of various classes of antibiotics on mitochondria in cancer and non-cancer cells and demonlow mitochondrial membrane potential, reduced ATP production, altered morphology and lowered respiration rate which altogether suggested mitochondrial dysfunction (MDF). This was in parallel with increased level of reactive oxygen species (ROS) and decreased activity of mitochondrial respiration complexes. However, both survival and repopulation capacity of cancer cells was not significantly affected by the antibiotics, perhaps due to a glycolytic shift or activated autophagy. In turn, simultaneous inhibition of autophagy and treatment with antibiotics largely reduced tumorigenic properties of cancer cells suggesting potential strategy for anticancer therapy.

Original languageEnglish
Pages (from-to)60-69
Number of pages10
JournalCancer Letters
Volume384
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Antibiotics
  • Autophagy
  • Cancer
  • Mitochondria
  • Mitochondrial dysfunction
  • Mitophagy
  • Mitochondrial Degradation/drug effects
  • Humans
  • Autophagy/drug effects
  • Electron Transport Chain Complex Proteins/metabolism
  • Anti-Bacterial Agents/pharmacology
  • Antineoplastic Combined Chemotherapy Protocols/pharmacology
  • Microtubule-Associated Proteins/genetics
  • Transfection
  • Time Factors
  • Mitochondria/drug effects
  • Female
  • Cell Proliferation/drug effects
  • Breast Neoplasms/drug therapy
  • Reactive Oxygen Species/metabolism
  • Adenosine Triphosphate/metabolism
  • Signal Transduction/drug effects
  • Membrane Potential, Mitochondrial/drug effects
  • Drug Synergism
  • Energy Metabolism/drug effects
  • Cell Line, Tumor
  • Adenine/analogs & derivatives
  • FANCONI-ANEMIA CELLS
  • MANNER
  • RESISTANCE

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