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• W2040371729 abstract "Platelet-derived growth factor (PDGF) has been implicated in promoting survival and proliferation of immature neurons, and even protecting neurons from gp120-induced cytotoxicity. However, the mechanisms involved in neuroprotection are not well understood. In the present study we demonstrate the role of phosphatidylinositol 3-kinase (PI3K)/Akt signaling in PDGF-mediated neuroprotection. Pharmacological inhibition of PI3K greatly reduced the ability of PDGF-BB to block gp120 IIIB-mediated apoptosis and cell death in human neuroblastoma cells. The role of Akt in PDGF-mediated protection was further corroborated using a dominant-negative mutant of Akt, which was able to block the protective effect of PDGF. We next sequentially examined the signals downstream of Akt in PDGF-mediated protection in human neuroblastoma cells. In cells pretreated with PDGF prior to gp120 there was increased phosphorylation of both GSK-3beta and Bad, an effect that was inhibited by PI3-kinase inhibitor. Nuclear translocation of NF-kappaB, which lies downstream of GSK-3beta, however, remained unaffected in cells treated with PDGF. In addition to inducing phosphorylation of Bad, PDGF-mediated protection also involved down-regulation of the proapoptotic protein Bax. Furthermore, PDGF-mediated protection also involved the inhibition of gp120-induced release of mitochondrial cytochrome C. Our findings thus underscore the roles of both PI3K/Akt and Bcl family pathways in PDGF-mediated neuroprotection." @default.
• W2040371729 created "2016-06-24" @default.
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• W2040371729 date "2008-10-01" @default.
• W2040371729 modified "2023-10-10" @default.
• W2040371729 title "Mechanisms of platelet-derived growth factor-mediated neuroprotection - implications in HIV dementia" @default.
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• W2040371729 doi "https://doi.org/10.1111/j.1460-9568.2008.06444.x" @default.
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