L-Glutathione Overview

L-Glutathione is a ubiquitous tripeptide present in virtually all living cells, serving as the primary intracellular antioxidant and redox regulator. As the reduced form (GSH), it participates in neutralizing reactive oxygen species (ROS), maintaining cellular redox homeostasis, and protecting proteins, lipids, and DNA from oxidative damage. Through its sulfhydryl group on the cysteine residue, glutathione acts as a substrate for glutathione peroxidase enzymes that reduce hydrogen peroxide and lipid peroxides. Research models examine its role in phase II detoxification pathways, immune cell proliferation and activation, mitochondrial function, and protein folding regulation in laboratory settings.

Forman et al. (2009). Lu (2013).

History

Glutathione was first discovered in 1888 by J. de Rey-Pailhade as a sulfur-containing compound in yeast and animal tissues, initially termed “philothion.” The complete chemical structure as a γ-glutamylcysteinylglycine tripeptide was elucidated in 1935 by Frederick Gowland Hopkins, who received the Nobel Prize for his contributions to vitamin discovery. Since then, glutathione has been recognized as a fundamental molecule in cellular biochemistry and redox biology.

Meister & Anderson (1983).

L-Glutathione Structure

CAS#: 70-18-8

Molecular Formula: C₁₀H₁₇N₃O₆S

Molecular Weight: 307.32 g/mol

PubChem ID: 124886

Research Findings

L-Glutathione has been extensively studied in redox biology research, with investigations focusing on antioxidant defense mechanisms, detoxification pathways, immune function modulation, and cellular protection in various experimental models. Studies examine glutathione’s role in enzymatic reactions, protein modification, and cellular signaling cascades.

Key Areas of Research:
• Antioxidant defense: ROS neutralization, oxidative stress protection, lipid peroxidation prevention
• Detoxification: Phase II conjugation reactions, xenobiotic metabolism, heavy metal chelation
• Immune function: T-cell proliferation, lymphocyte activation, cytokine production regulation
• Cellular protection: Mitochondrial function, protein folding, apoptosis regulation, DNA repair

Together, these investigations demonstrate glutathione’s central role in cellular homeostasis and protection. As a multifunctional tripeptide, GSH serves as a research tool for examining oxidative stress responses, detoxification capacity, immune cell function, and cellular resilience in diverse experimental systems and disease models.

Forman et al., Molecular Aspects of Medicine, 2009

References

Forman H.J. et al. (2009). Glutathione: overview of its protective roles, measurement, and biosynthesis. Molecular Aspects of Medicine, 30(1-2):1-12.

Lu S.C. (2013). Glutathione synthesis. Biochimica et Biophysica Acta, 1830(5):3143-3153.

Meister A. & Anderson M.E. (1983). Glutathione. Annual Review of Biochemistry, 52:711-760.