Glutathione (GSH) is a low-molecular-weight thiol tripeptide present in virtually all mammalian cells at millimolar concentrations. It exists in reduced (GSH) and oxidized (GSSG) forms, with the ratio serving as a key indicator of cellular redox status. Its central role in antioxidant defense, xenobiotic metabolism, and redox signaling has made it one of the most extensively researched molecules in biochemistry.
Oxidative Stress Regulation Research
Research has extensively examined glutathione's role as the primary intracellular antioxidant, including its function as a substrate for glutathione peroxidase (GPx) enzymes that neutralize hydrogen peroxide and lipid peroxides. Studies have investigated intracellular GSH/GSSG ratios as biomarkers of oxidative stress in various experimental disease models.
Detoxification and Phase II Metabolism Research
Glutathione-S-transferase (GST) enzyme research has examined glutathione's role in phase II xenobiotic metabolism, including its conjugation reactions with electrophilic compounds as part of hepatic detoxification processes.
Immune Function and Cellular Signaling Research
Research has examined glutathione's interactions with immune cell function, including its role in lymphocyte proliferation, NK cell activity, and cytokine signaling modulation, as well as its interactions with redox-sensitive transcription factors including NF-kB.
• Forman HJ et al. (2009). Glutathione: overview of its protective roles, measurement, and biosynthesis. Molecular Aspects of Medicine, 30(1-2), 1–12.
