Protective effects of (-)-epigallocatechin-3-gallate against acetaminophen-induced liver injury in rats

Hsien Tsung Yao, Yu Chi Yang, Chen Hui Chang, Hui Ting Yang, Mei Chin Yin

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


(-)-Epigallocatechin-3-gallate (EGCG) is the most abundant catechin with various biological activities found in tea. In this study, the effects of EGCG on the metabolism and toxicity of acetaminophen in rat liver were investigated. Male Sprague-Dawley rats were fed a controlled diet without or with EGCG (0.54%, w/w) for 1 week and were then intraperitoneally injected with acetaminophen (1 g/kg body weight) and killed after12 h. Concentrations of acetaminophen and its conjugates in plasma and liver were then determined. The cytochrome P450 (CYP) and phase II enzymes activities were also evaluated. Rats fed the EGCG diet had lower plasma alanine aminotransferase and aspartate aminotransferase activities, as indices of hepatotoxicity, after acetaminophen treatment. Morphological damage by acetaminophen was lower in rats fed the EGCG diet. In addition, EGCG significantly reduced hepatic activities of midazolam 1-hydroxylation (CYP3A), nitrophenol 6-hydroxylase (CYP2E1), UDP-glucurosyltransferase, and sulfotransferase. Finally, EGCG feeding reduced acetaminophen-glucuronate and acetaminophen-glutathione contents in plasma and liver. These results indicate that EGCG feeding may reduce the metabolism and toxicity of acetaminophen in rats.

Original languageEnglish
Pages (from-to)16-21
Number of pages6
JournalBioMedicine (Netherlands)
Issue number3
Publication statusPublished - Jan 1 2015
Externally publishedYes


  • (-)-Epigallocatechin-3-gallate
  • Acetaminophen
  • Cytochrome P450
  • Hepatotoxicity
  • Rats

ASJC Scopus subject areas

  • General Medicine
  • General Biochemistry,Genetics and Molecular Biology


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