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© 2004 The American Society for Nutritional Sciences J. Nutr. 134:489-492, March 2004


Recent Advances in Nutritional Sciences

Glutathione Metabolism and Its Implications for Health1

Guoyao Wu2, Yun-Zhong Fang*, Sheng Yang{dagger}, Joanne R. Lupton and Nancy D. Turner

Faculty of Nutrition, Texas A&M University, College Station, TX, 77843; * Department of Biochemistry and Molecular Biology, Beijing Institute of Radiation Medicine, Beijing, China 100850; and {dagger} Department of Animal Nutrition, China Agricultural University, Beijing, China 100094

2To whom correspondence should be addressed. E-mail: g-wu{at}tamu.edu.

Glutathione ({gamma}-glutamyl-cysteinyl-glycine; GSH) is the most abundant low-molecular-weight thiol, and GSH/glutathione disulfide is the major redox couple in animal cells. The synthesis of GSH from glutamate, cysteine, and glycine is catalyzed sequentially by two cytosolic enzymes, {gamma}-glutamylcysteine synthetase and GSH synthetase. Compelling evidence shows that GSH synthesis is regulated primarily by {gamma}-glutamylcysteine synthetase activity, cysteine availability, and GSH feedback inhibition. Animal and human studies demonstrate that adequate protein nutrition is crucial for the maintenance of GSH homeostasis. In addition, enteral or parenteral cystine, methionine, N-acetyl-cysteine, and L-2-oxothiazolidine-4-carboxylate are effective precursors of cysteine for tissue GSH synthesis. Glutathione plays important roles in antioxidant defense, nutrient metabolism, and regulation of cellular events (including gene expression, DNA and protein synthesis, cell proliferation and apoptosis, signal transduction, cytokine production and immune response, and protein glutathionylation). Glutathione deficiency contributes to oxidative stress, which plays a key role in aging and the pathogenesis of many diseases (including kwashiorkor, seizure, Alzheimer’s disease, Parkinson’s disease, liver disease, cystic fibrosis, sickle cell anemia, HIV, AIDS, cancer, heart attack, stroke, and diabetes). New knowledge of the nutritional regulation of GSH metabolism is critical for the development of effective strategies to improve health and to treat these diseases.


KEY WORDS: • amino acids • oxidative stress • cysteine • disease




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W. J. Chung, S. A. Lyons, G. M. Nelson, H. Hamza, C. L. Gladson, G. Y. Gillespie, and H. Sontheimer
Inhibition of Cystine Uptake Disrupts the Growth of Primary Brain Tumors
J. Neurosci., August 3, 2005; 25(31): 7101 - 7110.
[Abstract] [Full Text] [PDF]


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J. Clin. Endocrinol. Metab.Home page
P. Villa, C. Perri, R. Suriano, F. Cucinelli, S. Panunzi, M. Ranieri, C. Mele, and A. Lanzone
L-Folic Acid Supplementation in Healthy Postmenopausal Women: Effect on Homocysteine and Glycolipid Metabolism
J. Clin. Endocrinol. Metab., August 1, 2005; 90(8): 4622 - 4629.
[Abstract] [Full Text] [PDF]


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Am. J. Physiol. Gastrointest. Liver Physiol.Home page
S. S. Sundaram, P. F. Whitington, and R. M. Green
Steatohepatitis develops rapidly in transgenic mice overexpressing Abcb11 and fed a methionine-choline-deficient diet
Am J Physiol Gastrointest Liver Physiol, June 1, 2005; 288(6): G1321 - G1327.
[Abstract] [Full Text] [PDF]


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J. Nutr.Home page
H. Sies, W. Stahl, and A. Sevanian
Nutritional, Dietary and Postprandial Oxidative Stress
J. Nutr., May 1, 2005; 135(5): 969 - 972.
[Abstract] [Full Text] [PDF]


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Molecular Cancer TherapeuticsHome page
F. D. Arditti, A. Rabinkov, T. Miron, Y. Reisner, A. Berrebi, M. Wilchek, and D. Mirelman
Apoptotic killing of B-chronic lymphocytic leukemia tumor cells by allicin generated in situ using a rituximab-alliinase conjugate
Mol. Cancer Ther., February 1, 2005; 4(2): 325 - 332.
[Abstract] [Full Text] [PDF]


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Am. J. Clin. Nutr.Home page
S J. James, P. Cutler, S. Melnyk, S. Jernigan, L. Janak, D. W Gaylor, and J. A Neubrander
Metabolic biomarkers of increased oxidative stress and impaired methylation capacity in children with autism
Am. J. Clinical Nutrition, December 1, 2004; 80(6): 1611 - 1617.
[Abstract] [Full Text] [PDF]




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