TY - JOUR
T1 - Effect of phagocytosis and lonophores on release and metabolism of arachidonic acid from human neutrophils
AU - Walsh, Christopher E.
AU - Dechatelet, Lawrence R.
AU - Thomas, Michael J.
AU - O'Flaherty, Joseph T.
AU - Waite, Moseley
PY - 1981/2
Y1 - 1981/2
N2 - Challenge of human neutrophils prelabeled with [3H]arachidonate and [14C] palmitate or [14C]-stearate with opsonized zymosan or the Ca2+ ionophores A23187 or Ionomycin caused the release of [3H], but not [14C], fatty acid. With the ionophores, but not zymosan, considerable conversion of the [3H] arachidonate to hydroxyeicosatetraenoates occurred. Although various isomers were recovered, the 5-hydroxyeicosatetraenoate appeared to be the major product. In these experiments, no [14C] products were detected such as lysophospholipid, diglyceride or monoglyceride. Although no definitive statement can be made about the mechanism of release of arachidonate, our data are most easily interpreted as the result of the action of a phospholipase A2.
AB - Challenge of human neutrophils prelabeled with [3H]arachidonate and [14C] palmitate or [14C]-stearate with opsonized zymosan or the Ca2+ ionophores A23187 or Ionomycin caused the release of [3H], but not [14C], fatty acid. With the ionophores, but not zymosan, considerable conversion of the [3H] arachidonate to hydroxyeicosatetraenoates occurred. Although various isomers were recovered, the 5-hydroxyeicosatetraenoate appeared to be the major product. In these experiments, no [14C] products were detected such as lysophospholipid, diglyceride or monoglyceride. Although no definitive statement can be made about the mechanism of release of arachidonate, our data are most easily interpreted as the result of the action of a phospholipase A2.
UR - http://www.scopus.com/inward/record.url?scp=0019522180&partnerID=8YFLogxK
U2 - 10.1007/BF02535685
DO - 10.1007/BF02535685
M3 - Article
C2 - 6787359
AN - SCOPUS:0019522180
SN - 0024-4201
VL - 16
SP - 120
EP - 124
JO - Lipids
JF - Lipids
IS - 2
ER -