Green tea as a potent antioxidant in alcohol intoxication

Green tea as a potent antioxidant in alcohol intoxication Ethanol oxidation to acetaldehyde and next to acetate is accompanied by free radical generation. Free radicals can affect cell integrity when antioxidant mechanisms are no longer able to cope with the free radical generation observed in ethanol intoxication. Natural antioxidants are particularly useful in such a situation. The present study was designed to investigate the efficacy of green tea as a source of water‐soluble antioxidants (catechins) on the liver and blood serum antioxidative potential of rats chronically (28 days) intoxicated with ethanol. Alcohol caused a decrease in liver superoxide dismutase, glutathione peroxidase and catalase activities and an increase in activity of glutathione reductase. Moreover, a decrease in the level of reduced glutathione, ascorbic acid, vitamins A and E and β‐carotene were observed. The activity of serum glutathione peroxidase decreased while glutathione reductase activity increased. The level of serum non‐enzymatic antioxidants was also decreased in the liver. Alcohol administration caused an increase in the liver and serum lipid peroxidation products, measured as thiobarbituric acid‐reactive substances. However, green tea prevents the changes observed after ethanol intoxication. Green tea also protects membrane phospholipids from enhanced peroxidation. These results indicate a beneficial effect of green tea in alcohol intoxication. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Addiction Biology Wiley

Green tea as a potent antioxidant in alcohol intoxication

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Publisher
Wiley
Copyright
Copyright © 2002 Wiley Subscription Services, Inc., A Wiley Company
ISSN
1355-6215
eISSN
1369-1600
DOI
10.1080/13556210220139523
Publisher site
See Article on Publisher Site

Abstract

Ethanol oxidation to acetaldehyde and next to acetate is accompanied by free radical generation. Free radicals can affect cell integrity when antioxidant mechanisms are no longer able to cope with the free radical generation observed in ethanol intoxication. Natural antioxidants are particularly useful in such a situation. The present study was designed to investigate the efficacy of green tea as a source of water‐soluble antioxidants (catechins) on the liver and blood serum antioxidative potential of rats chronically (28 days) intoxicated with ethanol. Alcohol caused a decrease in liver superoxide dismutase, glutathione peroxidase and catalase activities and an increase in activity of glutathione reductase. Moreover, a decrease in the level of reduced glutathione, ascorbic acid, vitamins A and E and β‐carotene were observed. The activity of serum glutathione peroxidase decreased while glutathione reductase activity increased. The level of serum non‐enzymatic antioxidants was also decreased in the liver. Alcohol administration caused an increase in the liver and serum lipid peroxidation products, measured as thiobarbituric acid‐reactive substances. However, green tea prevents the changes observed after ethanol intoxication. Green tea also protects membrane phospholipids from enhanced peroxidation. These results indicate a beneficial effect of green tea in alcohol intoxication.

Journal

Addiction BiologyWiley

Published: Jul 1, 2002

References

  • Detection of DNA adducts of acetaldehyde in peripheral white blood cells of alcohol abusers
    Fang, JL; Vaca, CE.
  • Increased circulating products of lipid peroxidation in patients with alcoholic liver disease
    Aleynik, SI; Leo, MA; Aleynik, MK; Lieber, CS.
  • Polyphenols as cancer chemopreventive agents
    Stoner, GD; Mukhtar, H.
  • Increased lipid peroxidation and impaired antioxidant enzyme function is associated with pathological liver injury in experimental alcoholic liver disease in rats fed diets high in corn oil and fish oil
    Polavarapu, R; Spitz, DR; Sim, JE.
  • Inactivation of the human Cu, Zn Superoxide dismutase during exposure to O2 and H2O2
    Sinet, PM; Garber, P.
  • Glutathione consumption and glutathione peroxidase inactivation in fibro(tm) blast cell liner by 4‐hydroxy‐2‐nonenal
    Kinter, M; Roberts, RJ.
  • Antioxidant vitamins and disease prevention
    Block, G; Langseth, L.

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