Cell survival promoted by the Ras-MAPK signaling pathway by transcription-dependent and -independent mechanisms

Azad Bonni, Anne Brunet, Anne E. West, Sandeep Robert Datta, Mari A. Takasu, Michael E. Greenberg

Research output: Contribution to journalArticle

1579 Scopus citations

Abstract

A mechanism by which the Ras-mitogen-activated protein kinase (MAPK) signaling pathway mediates growth factor-dependent celt survival was characterized. The MAPK-activated kinases, the Rsks, catalyzed the phosphorylation of the pro-apoptotic protein BAD at serine 112 both in vitro and in vivo. The Rsk-induced phosphorylation of BAD at serine 112 suppressed BAD-mediated apoptosis in neurons. Rsks also are known to phosphorylate the transcription factor CREB (cAMP response element-binding protein) at serine 133. Activated CREB promoted cell survival, and inhibition of CREB phosphorylation at serine 133 triggered apoptosis. These findings suggest that the HAPK signaling pathway promotes cell survival by a dual mechanism comprising the posttranslational modification and inactivation of a component of the cell death machinery and the increased transcription of pro-survival genes.

Original languageEnglish
Pages (from-to)1358-1362
Number of pages5
JournalScience
Volume286
Issue number5443
DOIs
StatePublished - Nov 12 1999

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    Bonni, A., Brunet, A., West, A. E., Datta, S. R., Takasu, M. A., & Greenberg, M. E. (1999). Cell survival promoted by the Ras-MAPK signaling pathway by transcription-dependent and -independent mechanisms. Science, 286(5443), 1358-1362. https://doi.org/10.1126/science.286.5443.1358