title: Hepatic drug-metabolizing enzyme system and endotoxin tolerance: structural requirement of LPS in induction of an early tolerance.
abstract: The alteration of hepatic drug-metabolizing enzyme activities in mice given Salmonella endotoxin by single or multiple intraperitoneal injections was investigated. An essentially the same biphasic, early and late phase, endotoxin tolerance was observed in the animals receiving a single injection of endotoxin or repetitive daily injections. The results of reciprocal cross tolerance tests using lipopolysaccharide and free lipid A preparations derived from Salmonella minnesota, Salmonella typhimurium, E. coli, Pseudomonas aeruginosa, and Chromobacterium violaceum suggested that lipid A moiety plays an important role in the induction of early endotoxin tolerance to endotoxin response.
mesh_terms: D000818:Animals; D001835:Body Weight / Q000187:drug effects; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism; D004361:Drug Tolerance; D004731:Endotoxins / Q000633:toxicity*; D008050:Lipid A / Q000633:toxicity; D008070:Lipopolysaccharides / Q000633:toxicity*; D008099:Liver / Q000187:drug effects* / Q000378:metabolism; D008297:Male; D051379:Mice; D011135:Polysaccharides, Bacterial / Q000633:toxicity; D012475:Salmonella
chemical_list: D004731:Endotoxins; D008050:Lipid A; D008070:Lipopolysaccharides; D011135:Polysaccharides, Bacterial; D003577:Cytochrome P-450 Enzyme System