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- W2078323362 abstract "The first step in prostacyclin (PGI(2)) synthesis involves the generation of arachidonic acid (AA) from membrane phospholipids mediated by the 85 kDa cytosolic phospholipase A(2) (cPLA(2)alpha). The current study examined the effects of secretory PLA(2)s (sPLA(2)s) on PGI(2) production by human umbilical vein endothelial cells (HUVEC). We demonstrate that exposure of HUVEC to sPLA(2) dose- and time-dependently enhances AA release and PGI(2) generation. sPLA(2)-stimulated AA mobilisation was blocked by AACOCF(3), an inhibitor of cPLA(2)alpha, suggesting cross-talk between the two classes of PLA(2). sPLA(2) induced the phosphorylation of cPLA(2)alpha and enhanced the phosphorylation states of p42/44(mapk), p38(mapk), and JNK, concomitant with elevated AA and PGI(2) release. The MEK inhibitor PD98059 attenuated sPLA(2)-stimulated cPLA(2)alpha phosphorylation and PGI(2) release. These data show that sPLA(2) cooperates with cPLA(2)alpha in a MAPK-dependent manner to regulate PGI(2) generation and suggests that cross-talk between sPLA(2) and cPLA(2)alpha is a physiologically important mechanism for enhancing prostanoid production in endothelial cells." @default.
- W2078323362 created "2016-06-24" @default.
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- W2078323362 date "2001-10-01" @default.
- W2078323362 modified "2023-09-25" @default.
- W2078323362 title "sPLA2 Cooperates with cPLA2α to Regulate Prostacyclin Synthesis in Human Endothelial Cells" @default.
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- W2078323362 doi "https://doi.org/10.1006/bbrc.2001.5681" @default.
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