Identification of 2-azelaoylphosphatidylcholine as one of the cytotoxic products generated during oxyhemoglobin-induced peroxidation of phosphatidylcholine.
Cytotoxic product(s), which are responsible for inducing the release of acetylcholinesterase-enriched vesicles from human erythrocytes and cell lysis, are generated when 1-saturated-2-polyunsaturated glycerophosphocholine was incubated with oxyhemoglobin (Itabe, H., Kobayashi, T. and Inoue, K. (1988) Biochim. Biophys. Acta 961, 13-21). To identify the products, a model compound, 1-O-octadecyl-2-linoleoylglycerophosphocholine was incubated with oxyhemoglobin. The oxidation products were isolated by both straight-phase and reverse-phase HPLC. The products, which were responsible for inducing erythrocyte membrane damage, were analyzed by secondary ion mass spectrometry and 1H-NMR. One of the cytotoxic products isolated was identified as 1-O-octadecyl-2-azelaoylglycerophosphocholine. Methyl esterification of the product confirmed the proposed structure.
Itabe
H
H
Department of Health Chemistry, Faculty of Pharmaceutical Sciences, University of Tokyo, Japan.
Kushi
Y
Y
Handa
S
S
Inoue
K
K
D055598:Chemical Phenomena; D002621:Chemistry; D004910:Erythrocyte Membrane / Q000187:drug effects; D004912:Erythrocytes / Q000378:metabolism*; D006461:Hemolysis; D006801:Humans; D008054:Lipid Peroxides / Q000097:blood*; D010108:Oxyhemoglobins / Q000633:toxicity*; D010742:Phospholipid Ethers / Q000097:blood*
D008054:Lipid Peroxides; D010108:Oxyhemoglobins; D010742:Phospholipid Ethers; C057178:1-O-octadecyl-2-azelaorylglycerophosphocholine