Oral thearubigins do not protect against acetaminopheninduced hepatotoxicity in mice

  • Hussam A.S. Murad
  • Hamid S.A. Habib
  • Yasser M. Kamel
  • Salah A. Alsayed
  • Soad S. Ali
  • Zohair G. Gazzaz
Keywords: Acetaminophen, Hepatotoxicity, Thearubigins, N-acetylcysteine, Cellular necrosis, Vacuolization, Hepatic cytochrome P2E1

Abstract

Purpose: To investigate the potential protective effect of oral repeated doses of thearubigins against acetaminophen-induced hepatotoxicity in mice.

Methods: Mice were randomly divided into six groups (n=8) and administered the following: Control group (saline), acetaminophen group (saline), N-acetylcysteine group (500 mg/kg/day), and thearubigins groups (60, 70, 100 mg/kg/day). The drugs were given orally by gavage for seven days. On day 7, 1 h after the last dose of treatment, the mice (except control group) were given a single dose of acetaminophen (n-acetyl-p-aminophenol, APAP) orally by gavage (350 mg/kg) and then sacrificed 4 h post-APAP intake. Blood was collected for biochemical measurements and their liver were subjected to biochemical and histopathological assessment.

Results: The acetaminophen group showed significant increases (p < 0.001) in serum alanine aminotransferase level, hepatic cytochrome P2E1 level, and serum and hepatic malondialdehyde levels. Moreover it showed significant decrease (p < 0.001) in serum and hepatic glutathione levels. Morphologically, the liver sections showed cellular necrosis, vacuolization, and degeneration around the centrilobular veins. Pretreatment with N-acetylcysteine reversed all acetaminophen-induced changes (p < 0.001 for all biomarkers except for hepatic MDA (p = 0.014) while pretreatment with thearubigins failed to reverse any of them.

Conclusion: Oral repeated doses of thearubigins failed to protect against acetaminophen-induced hepatotoxicity in mice and didn't affect hepatic cytochrome P2E1 level.

Keywords: Acetaminophen, Hepatotoxicity, Thearubigins, N-acetylcysteine, Cellular necrosis, Vacuolization, Hepatic cytochrome P2E1

Published
2016-10-05
Section
Articles

Journal Identifiers


eISSN: 1596-9827
print ISSN: 1596-5996