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Glutathione in cancer cell death

Angel L Ortega1, Salvador Mena, Jose M Estrela

  • 1Department of Physiology, Faculty of Medicine and Odontology, University of Valencia, 17 Av. Blasco Ibanez, 46010 Valencia, Spain. jose.m.estrela@uv.es.

Cancers
|November 12, 2013
PubMed

Insights

Glutathione (GSH) levels in cancer cells impact cell death mechanisms and drug sensitivity. Modulating GSH synthesis and redox state offers potential strategies for cancer therapy.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cancer Research

Background:

  • Glutathione (L-γ-glutamyl-L-cysteinyl-glycine; GSH) plays a crucial role in cancer cell regulation, influencing sensitivity to therapies and cell fate.
  • The intracellular thiol redox state, governed by GSH, is integral to mitochondrial function and cell death pathways.

Purpose of the Study:

  • To review the multifaceted roles of GSH in cancer, focusing on its involvement in cell death mechanisms.
  • To explore how GSH depletion influences various cell death modalities and its implications for cancer therapy.

Main Methods:

  • Literature review and analysis of existing research on glutathione's role in cancer.
  • Discussion of gene expression, post-translational modifications, and signaling cascades affecting GSH levels.
  • Examination of in vivo conditions and therapeutic applications of GSH modulation.

Main Results:

  • GSH is implicated in regulating carcinogenic mechanisms, drug/radiation sensitivity, DNA synthesis, proliferation, and cell death.
  • Thiol oxidation, influenced by GSH, can trigger mitochondrion-based cell death.
  • GSH depletion is observed in apoptosis and other cell death types, suggesting its regulatory role in switching death mechanisms.

Conclusions:

  • GSH synthesis and flux dynamics are critical in determining cancer cell fate and switching between death pathways.
  • Understanding GSH's role in vivo is essential for developing effective cancer therapies targeting glutathione metabolism.

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