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- W2000502205 abstract "Plasmenyl phospholipids (1-alk-1′-enyl-2-acyl-3-glycerophospholipids, plasmalogens) are a structurally unique class of lipids that contain an α-unsaturated ether substituent at the sn-1 position of the glycerol backbone. Several studies have supported the hypothesis that plasmalogens may be antioxidant molecules that protect cells from oxidative stress. Because the molecular mechanisms responsible for the antioxidant properties of plasmenyl phospholipids are not fully understood, the oxidation of plasmalogens in natural mixtures of phospholipids was studied using electrospray tandem mass spectrometry. Glycerophosphoethanolamine (GPE) lipids from bovine brain were found to contain six major molecular species (16:0p/18:1-, 18:1p/18:1-, 18:0p/20:4-, 16:0p/20:4, 18:0a/20:4-, and 18:0a/22:6-GPE). Oxidation of GPE yielded lyso phospholipid products derived from plasmalogen species containing only monounsaturated sn-2 substituents and diacyl-GPE with oxidized polyunsaturated fatty acyl substituents at sn-2. The only plasmalogen species remaining intact following oxidation contained monounsaturated fatty acyl groups esterified at sn-2. The mechanism responsible for the rapid and specific destruction of plasmalogen GPE may likely involve unique reactivity imparted by a polyunsaturated fatty acyl group esterified at sn-2. This structural feature may play a central role determining the antioxidant properties ascribed to this class of phospholipids." @default.
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- W2000502205 date "1999-02-01" @default.
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- W2000502205 title "Susceptibility of plasmenyl glycerophosphoethanolamine lipids containing arachidonate to oxidative degradation" @default.
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- W2000502205 doi "https://doi.org/10.1016/s0891-5849(98)00211-1" @default.
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