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Turn up the cellular power generator with vitamin E analogue formulation

Ru Wen1, Shanta Dhar1

  • 1NanoTherapeutics Research Laboratory , Department of Chemistry , University of Georgia , Room 679 , Athens , GA 30602 , USA . Email: shanta@uga.edu ; ; Tel: +1-706-542-1012 ; http://shanta.uga.edu/.

Chemical Science
|July 24, 2018
PubMed

Insights

Alpha-tocopheryl succinate (α-TOS) nanoparticles activate mitochondrial ATP synthase, enhancing cancer cell death. This approach shows promise for treating solid tumors by targeting the cell

Area of Science:

  • Biochemistry
  • Cell Biology
  • Oncology

Background:

  • Cancer cells suppress ATP synthase, the cell's power generator, to promote growth via aerobic glycolysis and inhibit mitochondria-mediated cell death.
  • Alpha-tocopheryl succinate (α-TOS), a vitamin E derivative, selectively induces apoptosis in cancer cells through various mechanisms, but its effect on ATP synthase was unknown.

Purpose of the Study:

  • To investigate the effect of α-TOS on ATP synthase activity in cancer cells.
  • To develop and evaluate a mitochondria-targeted α-TOS nanoparticle formulation for cancer therapy.

Main Methods:

  • Designed a chemical formulation of α-TOS encapsulated in nanoparticles targeted to mitochondria.
  • Assessed the cytotoxicity and mitochondrial activities of the α-TOS nanoparticles in cancer cells.
  • Investigated the effects on Bcl2 protein expression and ATP synthase activation.

Main Results:

  • The mitochondria-targeted α-TOS nanoparticle formulation activated mitochondrial ATP synthase in cancer cells.
  • The formulation demonstrated enhanced cytotoxicity and improved mitochondrial activities.
  • α-TOS nanoparticles inhibited anti-apoptotic Bcl2 protein.

Conclusions:

  • Engineered α-TOS nanoparticles can activate mitochondrial ATP synthase, offering a novel strategy against cancer.
  • This approach is particularly promising for solid tumors characterized by compromised ATP synthase function.

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