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- W2012012590 abstract "PI 3-kinase enhancer (PIKE) is a nuclear GTPase that enhances PI 3-kinase (PI3K) activity. Nerve growth factor (NGF) treatment leads to PIKE activation by triggering the nuclear translocation of PLC-gamma1, which acts as a physiological guanine nucleotide exchange factor (GEF) for PIKE. PI3K occurs in the nuclei of a broad range of cell types, and various stimuli elicit PI3K nuclear translocation. While cytoplasmic PI3K has been well characterized, little is known about the biological function of nuclear PI3K. Surprisingly, nuclei from 30 min NGF-treated PC12 cells are resistant to DNA fragmentation initiated by the activated cell-free apoptosome, and both PIKE and nuclear PI3K are sufficient and necessary for this effect. Moreover, pretreatment of the control nucleus with PI(3,4,5)P3 alone mimics the anti-apoptotic activity of NGF by selectively preventing apoptosis, for which nuclear Akt is required but not sufficient. Recently, a nuclear PI(3,4,5)P3 receptor, nucleophosmin/B23, has been identified from NGF-treated PC12 nuclear extract. PI(3,4,5)P3/B23 complex mediates the anti-apoptotic effects of NGF by inhibiting DNA fragmentation activity of caspase-activated DNase (CAD). Thus, PI(3,4,5)P3/B23 complex and nuclear Akt effectors might coordinately mediate PIKE/nuclear PI3K signaling in promoting cell survival by NGF." @default.
- W2012012590 created "2016-06-24" @default.
- W2012012590 creator A5073266870 @default.
- W2012012590 date "2005-08-08" @default.
- W2012012590 modified "2023-10-09" @default.
- W2012012590 title "PIKE/nuclear PI 3-kinase signaling in preventing programmed cell death" @default.
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- W2012012590 doi "https://doi.org/10.1002/jcb.20549" @default.
- W2012012590 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16088938" @default.
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