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• W2045365086 endingPage "2744" @default.
• W2045365086 startingPage "2736" @default.
• W2045365086 abstract "Endothelial cell (EC) movement is required for the development and repair of blood vessels. We have previously shown that LDL oxidized by transition metals almost completely suppressed the wound-healing migratory response of vascular EC in vitro. We now report that lysophosphatidylcholine (lysoPC), a lipid component of oxidized LDL, has an important role in the antimigratory activity of the lipoprotein. Purified 1-palmitoyl lysoPC inhibited movement with a half-maximal activity at 12-15 micrometers, and near complete inhibition at 20 micrometers; the inhibitory concentration of lysoPC was consistent with its abundance in oxidized LDL. The inhibition was not due to cytotoxicity since protein synthesis was unaffected and since EC movement was restored after removal of lysoPC. Lysophospholipid activity was dependent on lipid structure. LysoPC's containing 1-position C16 or C18 saturated fatty acids were antimigratory, but those containing C < or = 14 saturated fatty acids or polyunsaturated fatty acids were not. The activity of 1-palmitoyl lysolipids with various head groups was examined. Lysophosphatidylinositol was more antimigratory than lysophosphatidylglycerol and lysophosphatidylcholine, which were more potent than lysophosphatidylserine and lysophosphatidylethanolamine. Monoglyceride was inactive while lysophosphatidate had promigratory activity. These results are consistent with head group size rather than charge as a critical determinant of activity. To show that lysophospholipids within an intact lipoprotein were active, LDL was treated with bee venom phospholipase A2 (PLA2). The modified lipoprotein inhibited EC movement to the same extent as iron-oxidized LDL and antimigratory activity correlated with the amount of lysoPC formed. To determine antimigratory activity of lysoPC present in oxidized LDL, lipid extracts from oxidized LDL were fractionated by normal phase HPLC. The fraction comigrating with lysoPC had nearly the same activity as the total extract confirming that lysoPC (or a co-eluting lipid) was a major antimigratory molecule in oxidized LDL. These studies demonstrate that lysoPC in oxidized LDL limit EC wound healing responses in vitro, and suggest a possible role for lysolipids in limiting endothelial regeneration after a denuding injury in vivo." @default.
• W2045365086 created "2016-06-24" @default.
• W2045365086 creator A5034006472 @default.
• W2045365086 creator A5086615981 @default.
• W2045365086 date "1996-06-15" @default.
• W2045365086 modified "2023-10-01" @default.
• W2045365086 title "Role of lysophosphatidylcholine in the inhibition of endothelial cell motility by oxidized low density lipoprotein." @default.
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• W2045365086 doi "https://doi.org/10.1172/jci118728" @default.
• W2045365086 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/507366" @default.
• W2045365086 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/8675684" @default.
• W2045365086 hasPublicationYear "1996" @default.
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