Abstract
High levels of ether phospholipids were found in rabbit alveolar macrophages. Choline phosphoglycerides (CPG) contained a significant amount of alkylacyl compound (32.5%). On the other hand, ethanolamine phosphoglyceride (EPG) included a very large amount of alkenylacyl compounds (61.2%). Small amounts of alkenylacyl CPG and alkylacyl EPG were also observed. The occurrence of a high amount of alkylacyl CPG may be related to the synthesis or release of platelet-activating factor (PAF) from macrophages. Fatty chains at the 1- and 2-positions in each lipid class of CPG or CPG or alkenylacyl EPG were several other. Particularly, the levels of 20∶4 (arachidonic acid) in alkylacyl CPG or alkenylacyl EPG were several times higher than those in corresponding diacyl phospholipids. Large portions of 20∶4-containing species have alkenyl or alkyl ether moieties at their 1-position in both CPG (73.6%) and EPG (85.9%). These results suggest the importance of ether-containing phospholipids in rabbit alveolar macrophages.
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Abbreviations
- CPG:
-
choline phosphoglycerides
- EPG:
-
ethanolamine phosphoglycerides
- PAF:
-
platelet-activating factor
- Hepes:
-
N-2-hydioxyethylpiperazine-N′-2-ethanesulphonic acid
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Sugiura, T., Nakajima, M., Sekiguchi, N. et al. Different fatty chain compositions of alkenylacyl, alkylacyl and diacyl phospholipids in rabbit alveolar macrophages: High amounts of arachidonic acid in ether phospholipids. Lipids 18, 125–129 (1983). https://doi.org/10.1007/BF02536106
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DOI: https://doi.org/10.1007/BF02536106