REACTIVE OXYGEN SPECIES ARE INVOLVED IN THE ACTIVATION OF CELLULAR PHOSPHOLIPASE-A2

被引:86
作者
GOLDMAN, R
FERBER, E
ZORT, U
机构
[1] WEIZMANN INST SCI,DEPT HORMONE RES,IL-76100 REHOVOT,ISRAEL
[2] MAX PLANCK INST IMMUNBIOL,W-7800 FREIBURG,GERMANY
关键词
PHOSPHOLIPASE-A2; NADPH OXIDASE; REACTIVE OXYGEN SPECIES; DIPHENYLENE IODONIUM; VANADATE; TYROSINE PROTEIN PHOSPHATASE;
D O I
10.1016/0014-5793(92)81092-Z
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Vanadate (V) potentiated (4- to 10-fold) the activation of cellular phospholipase A2 (PLA2) induced by H2O2 (H), a phorbol ester (T), a Ca2+-ionophore (A) and opsonized zymosan in macrophages. V+H induced in intact cells the activation and translocation of PLA2 and protein kinase C (PKC) to the plasma membrane. V+H and V+T+A induced strong chemiluminescence (CL) which was abrogated by a specific NADPH oxidase inhibitor diphenylene iodonium (DPI). DPI markedly suppressed the stimulation of PLA2 by V+T+A and V+OZ. The results suggest that the formation of endogenous reactive oxygen species (ROS) is important for PLA2 activation.
引用
收藏
页码:190 / 192
页数:3
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