Journal of Lipid Research, Vol 26, 1294-1299, Copyright © 1985 by Lipid Research, Inc.
Production of platelet-activating factor by washed rabbit platelets
M Oda, K Satouchi, K Yasunaga and K Saito
Production of platelet-activating factor by washed rabbit platelets under
stimulation with the ionophore A23187 was investigated utilizing two groups
of platelet preparations. The first platelet preparation contained 0.03 +/-
0.02% contaminating white cells, while the second preparation contained
0.48 +/- 0.27% white cells. The latter preparation produced
platelet-activating factor, mainly 1-hexadecyl-2-
acetyl-sn-glycero-3-phosphocholine, 8.3 +/- 6.3 pmol (mean +/- standard
deviation) with a range of 2.6 to 21.4 pmol (n = 9), followed by small
quantities of 1-octadecenyl- and 1-octadecyl-2-acetyl-sn-glycero-3-
phosphocholine. In contrast, there was no production of 1-alkyl-2-
acetyl-sn-glycero-3-phosphocholine by the former platelet preparation
having 0.03% leukocytes. These quantitative analyses were carried out by
the selected ion monitoring technique and it was concluded that it is
necessary to consider the presence of contaminating white cells in studies
on the production of platelet-activating factor by platelets.