Acute ethanol gavage attenuates hemorrhage/resuscitation-induced hepatic oxidative stress in rats

Oxid Med Cell Longev. 2012:2012:983427. doi: 10.1155/2012/983427. Epub 2012 Apr 5.

Abstract

Acute ethanol intoxication increases the production of reactive oxygen species (ROS). Hemorrhagic shock with subsequent resuscitation (H/R) also induces ROS resulting in cellular and hepatic damage in vivo. We examined the role of acute ethanol intoxication upon oxidative stress and subsequent hepatic cell death after H/R. 14 h before H/R, rats were gavaged with single dose of ethanol or saline (5 g/kg, EtOH and ctrl; H/R_EtOH or H/R_ctrl, resp.). Then, rats were hemorrhaged to a mean arterial blood pressure of 30 ± 2 mmHg for 60 min and resuscitated. Two control groups underwent surgical procedures without H/R (sham_ctrl and sham_EtOH, resp.). Liver tissues were harvested at 2, 24, and 72 h after resuscitation. EtOH-gavage induced histological picture of acute fatty liver. Hepatic oxidative (4-hydroxynonenal, 4-HNE) and nitrosative (3-nitrotyrosine, 3-NT) stress were significantly reduced in EtOH-gavaged rats compared to controls after H/R. Proapoptotic caspase-8 and Bax expressions were markedly diminished in EtOH-gavaged animals compared with controls 2 h after resuscitation. EtOH-gavage increased antiapoptotic Bcl-2 gene expression compared with controls 2 h after resuscitation. iNOS protein expression increased following H/R but was attenuated in EtOH-gavaged animals after H/R. Taken together, the data suggest that acute EtOH-gavage may attenuate H/R-induced oxidative stress thereby reducing cellular injury in rat liver.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aldehydes / metabolism
  • Animals
  • Caspase 8 / genetics
  • Caspase 8 / metabolism
  • Ethanol / toxicity*
  • Female
  • Hemorrhage / metabolism
  • Hemorrhage / pathology*
  • Liver / drug effects*
  • Liver / metabolism
  • Liver / pathology
  • Nitric Oxide Synthase Type II / metabolism
  • Oxidative Stress*
  • Proto-Oncogene Proteins c-bcl-2 / genetics
  • Proto-Oncogene Proteins c-bcl-2 / metabolism
  • Rats
  • Rats, Inbred Lew
  • Reactive Oxygen Species / metabolism
  • Resuscitation*
  • Tyrosine / analogs & derivatives
  • Tyrosine / metabolism
  • bcl-2-Associated X Protein / genetics
  • bcl-2-Associated X Protein / metabolism

Substances

  • Aldehydes
  • Proto-Oncogene Proteins c-bcl-2
  • Reactive Oxygen Species
  • bcl-2-Associated X Protein
  • 3-nitrotyrosine
  • Ethanol
  • Tyrosine
  • Nitric Oxide Synthase Type II
  • Caspase 8
  • 4-hydroxy-2-nonenal