Abstract
Oxidation properties of phospholipids: mechanistic studies. The antioxidant effects of phospholipids in the dark have been investigated by kinetic studies in a model system. The oxidation of methyl linoleate, thermally induced at 60°C by azobisisobutyronitrile (AIBN), was performed in heptanol or in ethyl heptanoate in the presence of phosphorylated diacylglycerols. The diphenyl ester of dipalmitoyl phosphatidic acid (DPPAPh2) showed no significant activity, under all experimental conditions used. In heptanol, the dibutyryl phosphatidylcholine (DBPC) was slightly antioxidant , but all dipalmitoyl phospholipids (except DPPAPh2) exhibited a pro-oxidant activity. However, such a negative effect did not occur in ethyl heptanoate.
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