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Journal of Lipid Research, Vol 30, 219-224, Copyright © 1989 by Lipid Research, Inc.
ARTICLES |
A Tokumura, K Takauchi, T Asai, K Kamiyasu, T Ogawa and H Tsukatani
Faculty of Pharmaceutical Sciences, University of Tokushima, Japan.
A vasodepressor phospholipid fraction named Depressor-IA from a bovine brain lipid extract was analyzed by capillary gas-liquid chromatography- mass spectrometry as tert-butyldimethylsilyl derivatives after hydrolysis with phospholipase C. Results show that Depressor-IA is a mixture of 3 platelet-activating factors and 17 1-acyl analogues. Three platelet-activating factors having sn-1-O-hexadecyl, octadecyl, and octadecenyl groups were suggested to account for the hypotensive activity of Depressor-IA, although the total amount of 1-acyl analogues of platelet-activating factor was much more than that of platelet- activating factor in the purified Depressor-IA. 1-Long-chain acyl-2- short-chain acyl-glycero-3-phosphocholines identified in Depressor-IA included novel molecular analogues having sn-2-propionyl, acryloyl, butyryl, valeryl, caproyl, and hepatonoyl groups.
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