Chemotactic activity for human PMN generated during ethanol metabolism by rat hepatocytes: role of glutathione and glutathione peroxidase.
Infiltration of the liver by polymorphonuclear leukocytes is a characteristic feature of alcoholic hepatitis. We have previously shown that liver cytosol metabolizing ethanol generates chemoattractant activity for polymorphonuclear leukocytes and that hydroxyl radical scavengers inhibit this process. To investigate the possibility that endogenous glutathione and glutathione peroxidase also inhibit this process, we evaluated chemoattractant activity production by glutathione and glutathione peroxidase deficient rat liver cytosol during ethanol metabolism. Incubation of cytosol deficient in both glutathione and glutathione peroxidase with 10 mM ethanol for 1 hour resulted in a 500-fold increase in chemoattractant activity when compared to cytosol with normal glutathione and glutathione peroxidase content. These findings provide further evidence for a role of oxygen free radicals in the generation of chemotactic activity and they also suggest that the ethanol-induced decrease in hepatic glutathione and glutathione peroxidase reported by others may have a significant potentiating effect on the recruitment of pro-inflammatory cells into the liver.
Neuschwander-Tetri
B A
BA
University of California San Francisco Liver Center Laboratory, San Francisco General Hospital 94110.
Roll
F J
FJ
D000818:Animals; D019328:Buthionine Sulfoximine; D002478:Cells, Cultured; D002634:Chemotaxis, Leukocyte; D003600:Cytosol / Q000378:metabolism; D000431:Ethanol / Q000378:metabolism*; D005978:Glutathione / Q000172:deficiency / Q000378:metabolism*; D005979:Glutathione Peroxidase / Q000172:deficiency / Q000378:metabolism*; D006801:Humans; D007700:Kinetics; D008099:Liver / Q000187:drug effects / Q000378:metabolism*; D008297:Male; D008717:Methionine Sulfoximine / Q000031:analogs & derivatives / Q000494:pharmacology; D009240:N-Formylmethionine Leucyl-Phenylalanine; D009504:Neutrophils / Q000502:physiology*; D051381:Rats; D012643:Selenium / Q000172:deficiency
D008717:Methionine Sulfoximine; D000431:Ethanol; D019328:Buthionine Sulfoximine; D009240:N-Formylmethionine Leucyl-Phenylalanine; D005979:Glutathione Peroxidase; D005978:Glutathione; D012643:Selenium