[Protective action of fat- and water-soluble antioxidants on the cytochrome P-450 system during lipid peroxidation in liver microsomes].

The protective effects of alpha-tocopherol, carnosine and their mixture on monooxygenase system during lipid peroxidation in liver microsome membranes were studied. It was shown that for optimal protection effect of cytochrome P-450 system the mixture of water and liposoluble antioxidants is required.

[Effectiveness of lipid peroxidation inhibition in biomembranes by antioxidants with and without hydrocarbon chains].

The efficacy of lipid peroxidation inhibition by the natural antioxidant alpha-tocopherol and 2,2,5,7,8-pentamethyl-6-hydroxy-chromane (PMC), a derivative without hydrocarbon tail, as well as by the synthetic antioxidant 4-methyl-2,6-diterbutyl phenol (BHT) and its phospholipid derivative was studied in the membranes of rat liver microsomes and mitochondria. The presence of hydrocarbon tail in the antioxidant molecule determines the decrease of antioxidant efficiency in biomembranes. PMC and BHT exert a destructive effect on biomembranes, leading to an increase in their permeability to ions.