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Spectrophotometric Screening for Potential Inhibitors of Cytosolic Glutathione S-Transferases
Published on: October 10, 2020
Glutathione and glutathione-dependent enzymes in cancer drug resistance
Lesley I. McLellan1, C. Roland Wolf
1Ninewells Hospital, Medical School, Dundee, UK
Abstract:
Genetic and biochemical evidence has demonstrated that glutathione and glutathione-dependent enzymes play a central role in cellular defence against toxic environmental agents. Modulation of cellular glutathione homeostasis can also have a profound effect on the sensitivity of cancer cells to a wide range of drugs used in chemotherapy. These effects are produced by multifactorial mechanisms that involve inactivation of toxic electrophiles by conjugation, modulation of cellular redox state, activation of drug transporter systems and regulation of cell signalling and repair pathways. New data demonstrating the importance of these pathways in cytoprotection and greater understanding of the mechanisms which regulate their function reveal a number of new targets for novel anti-cancer agents. It is critical, however, if these targets are to be exploited correctly that the dynamics of glutathione regulation are taken into account. Copyright 1999 Harcourt Publishers Ltd.
Insights
Glutathione and its enzymes are crucial for cellular defense against toxins and influence cancer drug sensitivity. Understanding glutathione regulation offers new anti-cancer targets but requires careful consideration of its dynamic nature.
Area of Science:
- Biochemistry
- Cell Biology
- Pharmacology
Background:
- Glutathione and glutathione-dependent enzymes are vital for cellular defense against environmental toxins.
- Cellular glutathione homeostasis significantly impacts cancer cell sensitivity to chemotherapy drugs.
Purpose of the Study:
- To explore the multifactorial mechanisms by which glutathione affects drug sensitivity in cancer.
- To identify novel anti-cancer targets based on cytoprotective pathways regulated by glutathione.
Main Methods:
- Review of genetic and biochemical evidence.
- Analysis of mechanisms including electrophile inactivation, redox state modulation, drug transporter activation, and cell signaling regulation.
Main Results:
- Glutathione pathways are involved in cytoprotection and drug resistance in cancer.
- Mechanisms include conjugation, redox modulation, transporter activation, and signaling pathway regulation.
- New anti-cancer targets can be derived from these pathways.
Conclusions:
- Glutathione dynamics are critical for exploiting new anti-cancer therapeutic targets.
- Further understanding of glutathione regulation is essential for effective cancer treatment strategies.
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