Biomaterial Database

Endotoxic glycolipid as a potent depressor of the hepatic drug-metabolizing enzyme systems in mice. 1979

K Egawa, and N Kasai

Inhibitory effects of the endotoxic glycolipid from Salmonella minnesota R595 on hepatic drug-metabolizing enzyme activities in mice were investigated, and the depressor activity of the glycolipid in the enzyme systems was confirmed. Among degradation products of lipopolysaccharides tested, lipid A preparations derived from the mild acetic acid hydrolysates of lipopolysaccharides were the most active, but the lipid A fractions prepared from the hydrolysates with 1 N-HCl were almost inactive. A degraded polysaccharide fraction from E. coli lipopolysaccharide was inactive. The activities of the glycolipid and the lipid A preparation were markedly reduced by treatment with alkaline-hydroxylamine, mild alkali or hydrazine. The data showed that the lipid A moiety of the glycolipid may be responsible for the inhibitory activity on the hepatic drug-metabolizing enzyme systems.

UI	MeSH Term	Description	Entries
D008050	Lipid A	Lipid A is the biologically active component of lipopolysaccharides. It shows strong endotoxic activity and exhibits immunogenic properties.
D008070	Lipopolysaccharides	Lipid-containing polysaccharides which are endotoxins and important group-specific antigens. They are often derived from the cell wall of gram-negative bacteria and induce immunoglobulin secretion. The lipopolysaccharide molecule consists of three parts: LIPID A, core polysaccharide, and O-specific chains (O ANTIGENS). When derived from Escherichia coli, lipopolysaccharides serve as polyclonal B-cell mitogens commonly used in laboratory immunology. (From Dorland, 28th ed)	Lipopolysaccharide,Lipoglycans
D008099	Liver	A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances.	Livers
D008297	Male		Males
D004305	Dose-Response Relationship, Drug	The relationship between the dose of an administered drug and the response of the organism to the drug.	Dose Response Relationship, Drug,Dose-Response Relationships, Drug,Drug Dose-Response Relationship,Drug Dose-Response Relationships,Relationship, Drug Dose-Response,Relationships, Drug Dose-Response
D004364	Pharmaceutical Preparations	Drugs intended for human or veterinary use, presented in their finished dosage form. Included here are materials used in the preparation and/or formulation of the finished dosage form.	Drug,Drugs,Pharmaceutical,Pharmaceutical Preparation,Pharmaceutical Product,Pharmaceutic Preparations,Pharmaceutical Products,Pharmaceuticals,Preparations, Pharmaceutical,Preparation, Pharmaceutical,Preparations, Pharmaceutic,Product, Pharmaceutical,Products, Pharmaceutical
D004731	Endotoxins	Toxins closely associated with the living cytoplasm or cell wall of certain microorganisms, which do not readily diffuse into the culture medium, but are released upon lysis of the cells.	Endotoxin
D006017	Glycolipids	Any compound containing one or more monosaccharide residues bound by a glycosidic linkage to a hydrophobic moiety such as an acylglycerol (see GLYCERIDES), a sphingoid, a ceramide (CERAMIDES) (N-acylsphingoid) or a prenyl phosphate. (From IUPAC's webpage)	Glycolipid
D000633	Aminopyrine N-Demethylase		Aminopyrine N Demethylase,Demethylase, Aminopyrine N,N Demethylase, Aminopyrine,N-Demethylase, Aminopyrine
D000815	Aniline Hydroxylase	A drug-metabolizing, cytochrome P-450 enzyme which catalyzes the hydroxylation of aniline to hydroxyaniline in the presence of reduced flavoprotein and molecular oxygen. EC 1.14.14.-.	Hydroxylase, Aniline