title: [Mechanism of action of carbonyl compounds (4-hydroxyalkenals) derived from the peroxidation of hepatic microsomal lipids].
abstract: When carbonyl compounds released during the NADPH-Fe dependent peroxidation of liver microsomal lipids and identified as 4-hydroxyalkenals (almost entirely 4-hydroxynonenal) are incubated with liver microsomes, a substantial amount of these products can be recovered bound to the microsomal protein, by allowing the microsomal protein to react with 2,4-dinitrophenyl-hydrazine. Concomitantly with the binding a decrease in the "exposed" and total -SH groups is stechiometrically accounted for by the amount of carbonyl compounds bound to the microsomal protein. Still in concomitance with the binding, the G-6-Pase activity of the microsomes markedly decreased. Therefore a mechanism similar to that described (12) for the binding of 4-hydroxyalkenals to -SH groups of protein and enzymes can be postulated.
mesh_terms: D000447:Aldehydes / Q000494:pharmacology; D005954:Glucosephosphate Dehydrogenase / Q000378:metabolism; D008054:Lipid Peroxides / Q000494:pharmacology*; D008862:Microsomes, Liver / Q000032:analysis* / Q000378:metabolism; D010659:Phenylhydrazines / Q000378:metabolism
chemical_list: D000447:Aldehydes; D008054:Lipid Peroxides; D010659:Phenylhydrazines; C004787:2,4-dinitrophenylhydrazine; D005954:Glucosephosphate Dehydrogenase; C027576:4-hydroxy-2-nonenal
vernacular_title: Sul meccanismo di azione dei composti carbonilici (4-idrossialchenali) derivati dalla perossidazione dei lipidi microsomali epatici.