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- W1528562972 abstract "Abstract Activation of the mitogen‐activated protein kinase (MAPK/ERK) signal transduction pathway may mediate excitotoxic neuronal cell death in vitro and during ischemic brain injury in vivo . However, little is known, of the upstream regulation or downstream consequences of ERK activation under these conditions. Magnesium removal has been described to induce hyperexcitability and degeneration in cultured hippocampal neurones. Here, we show that neurotoxicity evoked by Mg 2+ removal in primary hippocampal neurones stimulates ERK, but not p38, phosphorylation. Removal of Mg 2+ also resulted in induction of the MAPK/ERK substrate mitogen‐ and stress‐response kinase 1 (MSK1) and induced phosphorylation of the MSK1 substrate, the transcription factor cAMP response element binding protein (CREB). Neuronal death and phosphorylation of components in this cascade were inhibited by the Raf inhibitor SB‐386023, by the MEK inhibitor U0126, or by the MSK1 inhibitors H89 and Ro318220. Importantly, this form of cell death was inhibited in hippocampal neurones cultured from MSK1–/– mice and inhibitors of Raf or MEK had no additive neuroprotective effect. Together, these data indicate that MSK1 is a physiological kinase for CREB and that this activity is an essential component of activity‐dependent neuronal cell death." @default.
- W1528562972 created "2016-06-24" @default.
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- W1528562972 date "2003-07-01" @default.
- W1528562972 modified "2023-10-15" @default.
- W1528562972 title "Mitogen and stress response kinase-1 (MSK1) mediates excitotoxic induced death of hippocampal neurones" @default.
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- W1528562972 doi "https://doi.org/10.1046/j.1471-4159.2003.01830.x" @default.
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