VOPROSY MEDITSINSKOI KHIMII (ISSN 0042-8809)

Effect of different forms of vitamin A and its combination with vitamin E on the peroxidation of lipids

   
Galkina S.I.
PubMed Id: 6506589
Year: 1984  Volume: 30  Issue: 4  Pages: 91-94
Effect of vitamins A and E derivatives on Fe-ascorbate dependent peroxidation was studied by means of thiobarbituric acid test in liposomes prepared from egg lecithin. Retinol, incorporated into liposomes at concentration less than 0.1 mol%, increases the lecithin oxidation, retinyl palmitate was less active and alpha-tocopherol inhibited the reaction. Synergistic effect of alpha-tocopherol and retinol was observed. After simultaneous administration of retinol and alpha-tocopherol into liposomes, vitamin A did not accelerate the lecithin oxidation but increased distinctly the inhibitory effect of alpha-tocopherol. This interaction did not occur between retinol and alpha-tocopherol acetate as well as between m-retinyl acetate and alpha-tocopherol. The data obtained suggest that vitamins A and E affect the lipid peroxidation not only via direct participation in free radical oxidation but also due to transformations of biological membranes structure.
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Reference:

Galkina S.I. (1984) Voprosy meditsinskoi khimii, 30(4), 91-94.
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