title: Hepatic stimulator substance protects against acute liver failure induced by carbon tetrachloride poisoning in mice.
abstract: Hepatic stimulator substance was extracted from the liver of weanling Sprague-Dawley rats according to the method of LaBrecque. Quang-Ming mice were injected with carbon tetrachloride to induce acute liver failure. Hepatic stimulator substance suppressed the elevation of ALT and AST induced by carbon tetrachloride in a dose-dependent manner. Hepatic histological changes indicated that hepatic stimulator substance reduced the severity of hepatic lesion induced by carbon tetrachloride and reversed carbon tetrachloride-induced reduction of hepatic mitochondrial succinic dehydrogenase activity. In attempting to elucidate the mechanism or mechanisms of this protective effect, we found that hepatic stimulator substance significantly restored the carbon tetrachloride-induced decrease of hepatocyte plasmalemma and mitochondrial and microsomal membrane fluidity. Hepatic stimulator substance also decreased the malondialdehyde content of carbon tetrachloride-intoxicated mice; restored the liver-reduced glutathione content, which was lowered by carbon tetrachloride intoxication; stimulated liver regeneration, as shown by enhanced DNA synthesis; and increased the 3H-thymidine incorporation into DNA of hepatocytes. We propose that hepatic stimulator substance protects the liver against acute liver failure induced by carbon tetrachloride poisoning, probably by an antioxidative effect on hepatocyte membrane lipid peroxidation, which was increased by free radicals produced from carbon tetrachloride. In addition, hepatic stimulator substance stimulates hepatocyte proliferation. These protective mechanisms may act in concert to protect against carbon tetrachloride injury.
authors: Department of Physiology, Dalian Medical College, People's Republic of China.
authors: M H
authors: MH
authors: Mei
authors: W
authors: W
authors: An
authors: B H
authors: BH
authors: Zhang
authors: Q
authors: Q
authors: Shao
authors: D Z
authors: DZ
authors: Gong
mesh_terms: D000410:Alanine Transaminase / Q000097:blood; D000818:Animals; D001219:Aspartate Aminotransferases / Q000097:blood; D002252:Carbon Tetrachloride Poisoning / Q000150:complications / Q000473:pathology / Q000503:physiopathology*; D002478:Cells, Cultured; D004261:DNA Replication; D005978:Glutathione / Q000378:metabolism; D006133:Growth Substances / Q000302:isolation & purification / Q000494:pharmacology*; D036341:Intercellular Signaling Peptides and Proteins; D015227:Lipid Peroxidation; D008099:Liver / Q000187:drug effects / Q000378:metabolism / Q000502:physiology*; D017093:Liver Failure / Q000209:etiology / Q000473:pathology / Q000517:prevention & control*; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism; D008560:Membrane Fluidity; D051379:Mice; D008815:Mice, Inbred Strains; D008930:Mitochondria, Liver / Q000201:enzymology; D008934:Mitogens / Q000302:isolation & purification / Q000494:pharmacology; D010455:Peptides / Q000302:isolation & purification / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D013385:Succinate Dehydrogenase / Q000378:metabolism; D013936:Thymidine / Q000378:metabolism
chemical_list: D006133:Growth Substances; D036341:Intercellular Signaling Peptides and Proteins; D008934:Mitogens; D010455:Peptides; C073456:hepatic stimulator substance; D008315:Malondialdehyde; D013385:Succinate Dehydrogenase; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase; D005978:Glutathione; D013936:Thymidine