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• W1995688110 abstract "Recently we proposed that COX-2 induction precedes expression of HO-1 in ischemic preconditioned rat brain. In the current study, we investigated the molecular mechanism by which prostaglandin E(2), one of COX-2 metabolites, induces HO-1 in rat C6 brain cells. We demonstrated that concentration of PGE(2) increased HO-1 expression in C6 cells in vitro. The effects of PGE(2) were mimicked by PGE(2) receptor EP(2) agonists, 11-deoxy PGE(2), and cAMP analog, dibutyl-cAMP. HO-1 expression by PGE(2) was inhibited by LY294002, PI3K inhibitor and H89, PKA inhibitor. The EP(2)-specific antagonist, AH8006 also inhibited PGE(2)-mediated HO-1 expression in a concentration-dependent manner. Finally, PGE(2) inhibited GOX-induced apoptosis as assayed by FACS analysis or DNA strand breaks assay, and this cell death was reversed by ZnPPIX, HO-1 inhibitor. In addition to HO-1 induction, PGE(2) also increased phosphorylation of Bad by PKA- and PI3K-depednent manner. Taken together, we conclude that PGE(2) induces HO-1 protein expression through PKA and PI3K signaling pathways via EP(2) receptor in C6 cells. The induction of HO-1 along with increase of p-Bad by PGE(2) is responsible for anti-apoptosis against oxidant stress." @default.
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• W1995688110 date "2009-02-01" @default.
• W1995688110 modified "2023-09-23" @default.
• W1995688110 title "EP2 receptor activation by prostaglandin E2 leads to induction of HO-1 via PKA and PI3K pathways in C6 cells" @default.
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• W1995688110 doi "https://doi.org/10.1016/j.bbrc.2009.01.005" @default.
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