Radical exchange reactions between vitamin E, vitamin C and phospholipids in autoxidizing polyunsaturated lipids.
Free Radic Res
; 20(1): 1-10, 1994 Jan.
Article
in En
| MEDLINE
| ID: mdl-8012517
ABSTRACT
Antioxidant reactions of mixtures of vitamin E, vitamin C and phospholipids in autoxidizing lipids at 90 degrees C have been studied by ESR spectroscopy. When the phospholipid contained a tertiary amine (e.g. phosphatidylcholine), the vitamin C and the vitamin E radicals were successively observed as these two vitamins were sequentially oxidised during lipid oxidation. In the presence of the primary amine contained in phosphatidylserine, the vitamin E oxidation was delayed for a few hours. In this case neither the vitamin C, nor the vitamin E radicals but a nitroxide radical derived from the phospholipid was observed. Similar results to those obtained with PS were obtained in the presence of either phosphatidylethanolamine or soybean lecithin. The participation in the radical reactions of phospholipids possessing a primary amine can therefore explain the synergistic effect of these phospholipids in a mixture of vitamins E and C.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Phospholipids
/
Ascorbic Acid
/
Vitamin E
/
Fatty Acids, Unsaturated
Language:
En
Journal:
Free Radic Res
Journal subject:
BIOQUIMICA
Year:
1994
Type:
Article
Affiliation country:
Switzerland