Effects of S-Adenosylmethionine and Its Combinations With Taurine and/or Betaine on Glutathione Homeostasis in Ethanol-induced Acute Hepatotoxicity
Journal of Cancer Prevention
;
: 164-172, 2016.
Article
in English
| WPRIM
| ID: wpr-201288
ABSTRACT
BACKGROUND:
Exposure to ethanol abuse and severe oxidative stress are risk factors for hepatocarcinoma. The aim of this study was to evaluate the effects of S-adenosylmethionine (SAMe) and its combinations with taurine and/or betaine on the level of glutathione (GSH), a powerful antioxidant in the liver, in acute hepatotoxicity induced by ethanol.METHODS:
To examine the effects of SAMe and its combinations with taurine and/or betaine on ethanol-induced hepatotoxicity, AML12 cells and C57BL/6 mice were pretreated with SAMe, taurine, and/or betaine, followed by ethanol challenge. Cell viability was detected with an MTT assay. GSH concentration and mRNA levels of GSH synthetic enzymes were measured using GSH reductase and quantitative real-time reverse transcriptase-PCR. Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activities were measured with commercially available kits.RESULTS:
Pretreatment of SAMe, with or without taurine and/or betaine, attenuated decreases in GSH levels and mRNA expression of the catalytic subunit of glutamate-cysteine ligase (GCL), the rate-limiting enzyme for GSH synthesis, in ethanol-treated cells and mice. mRNA levels of the modifier subunit of GCL and glutathione synthetase were increased in mice treated with SAMe combinations. SAMe, taurine, and/or betaine pretreatment restored serum ALT and AST levels to control levels in the ethanol-treated group.CONCLUSIONS:
Combinations of SAMe with taurine and/or betaine have a hepatoprotective effect against ethanol-induced liver injury by maintaining GSH homeostasis.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Oxidoreductases
/
Aspartate Aminotransferases
/
S-Adenosylmethionine
/
Taurine
/
Betaine
/
RNA, Messenger
/
Cell Survival
/
Risk Factors
/
Oxidative Stress
/
Catalytic Domain
Type of study:
Etiology study
/
Risk factors
Limits:
Animals
Language:
English
Journal:
Journal of Cancer Prevention
Year:
2016
Type:
Article
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