Cited by 41Sulfur Compounds in BiologyAldose Reductase and TaurineGenomics, phytochemicals, and oxidative stress

Supplementation with n-acetylcysteine and taurine failed to restore glutathione content in liver of streptozotocin-induced diabetics rats but protected from oxidative stress

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Patriarca, Stefania, Furfaro, Anna Lisa, Domenicotti, Cinzia, Odetti, Patrizio, Cottalasso, Damiano, Marinari, Umberto M., Pronzato, M. Adelaide, Traverso, Nicola·2005·Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease

Abstract

Rats were rendered diabetic with streptozotocin and supplemented or not with N-acetylcysteine (NAC) and taurine (TAU). The liver was examined for the quantity of glutathione (GSH), both total and oxidised (GSSG), by HPLC assay. Moreover, the liver expression of gamma-glutamyl-cysteine synthetase, cysteine dioxygenase and heme oxygenase 1 was evaluated. Streptozotocin-diabetic rats showed decreased levels of liver glutathione (GSH); dietary supplementation with the antioxidants NAC and TAU failed to restore liver GSH to the level of control rats. Gamma-glutamyl-cysteine synthetase expression was not reduced in the diabetic rats, so the low hepatic GSH level in the supplemented diabetic rats cannot be ascribed to decreased expression of the biosynthetic key enzyme. Moreover, the diabetic rats showed no evidence of increased expression of cysteine dioxygenase, which could have indicated that NAC-derived cysteine was consumed in metabolic pathways different from GSH synthesis. However, NAC+TAU treatment provided partial protection from glutathione oxidation in the liver of diabetic rats; moreover, the antioxidant treatment reduced the hepatic overexpression of heme oxygenase 1 (HO-1) mRNA which was detected in the diabetic rats. In conclusion, although NAC was not able to restore liver GSH levels, the antioxidant treatment restrained GSH oxidation and HO-1 overexpression, which are markers of cellular oxidative stress: diabetic rats probably exploit NAC as an antioxidant itself rather than as a GSH precursor.

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Authors
Patriarca, S., Furfaro, A. L., Domenicotti, C., Odetti, P., Cottalasso, D., Marinari, U. M., Pronzato, M. A., & Traverso, N.
Affiliations
University of Genoa (IT)
Corresponding author
Traverso, Nicola
Venue
Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease
Publisher
Elsevier BV
Published
2005-06
Volume
1741
Issue
1-2
Pages
48-54
ISSN
0925-4439 (ISSN-L)
OpenAlex
W1973431752
Cited by
41
References
40
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 2 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 5 · 2018: 2 · 2017: 1 · 2016: 2 · 2015: 2 · 2014: 1 · 2013: 2 · 2012: 2
FWCI
1.18
Type
journal article
Language
en
Open access
Locations
  • Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease (publishedVersion)
  • PubMed (publishedVersion)
  • CINECA IRIS Institutial Research Information System (University of Genoa) (submittedVersion, other-oa)
Funders
  • University of Washington
  • Ministero dell’Istruzione, dell’Università e della Ricerca (COFIN 2004, 2004063943, 2003067599, FIRB_2001)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Sulfur Compounds in Biology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Aldose Reductase and Taurine
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics, phytochemicals, and oxidative stress
Keywords
N-acetylcysteine, taurine, glutathione, oxidative stress, streptozotocin-induced diabetes, liver, heme oxygenase-1, gamma-glutamylcysteine synthetase, cysteine dioxygenase, antioxidant supplementation, glutathione oxidation, glutathione disulfide
MeSH terms
Acetylcysteine, Animals, Antioxidants, Diabetes Mellitus, Experimental, Glutathione, Liver, Male, Taurine, Rats, Sprague-Dawley, Oxidative Stress, Dioxygenases, Rats

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