Nuclear translocation of nuclear transcription factor-κB by α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptors leads to transcription of p53 and cell death in dopaminergic neurons

Gabriel A. De Erausquin, Krzyztof Hyrc, David A. Dorsey, Daniel Mamah, Mehmet Dokucu, Daniel H. Mascó, Timothy Walton, Krikor Dikranian, Mario Soriano, José Manuel García Verdugo, Mark P. Goldberg, Laura L. Dugan

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

We describe a new molecular mechanism of cell death by excitotoxicity mediated through nuclear transcription factor κB (NFκB) in rat embryonic cultures of dopaminergic neurons. Treatment of mesencephalic cultures with α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) resulted in a number of changes that occurred selectively in dopaminergic neurons, including persistent elevation in intracellular Ca2+ monitored with Fura-2, and a significant increase in intramitochondrial oxidation of dihydrorhodamine 123, probably associated with transient increase of mitochondrial permeability, cytochrome c release, nuclear translocation of NFκB, and transcriptional activation of the oncogene p53. Interruption of any of these steps by specific antagonists prevented neurite pruning and programmed cell death. In contrast, cell death was not prevented by caspase antagonists and only partly prevented by nitric-oxide synthase inhibitors. This signal transduction pathway might be a contributing mechanism in ongoing neuronal death in Parkinson disease.

Original languageEnglish (US)
Pages (from-to)784-790
Number of pages7
JournalMolecular pharmacology
Volume63
Issue number4
DOIs
StatePublished - Apr 1 2003
Externally publishedYes

ASJC Scopus subject areas

  • Molecular Medicine
  • Pharmacology

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    De Erausquin, G. A., Hyrc, K., Dorsey, D. A., Mamah, D., Dokucu, M., Mascó, D. H., Walton, T., Dikranian, K., Soriano, M., García Verdugo, J. M., Goldberg, M. P., & Dugan, L. L. (2003). Nuclear translocation of nuclear transcription factor-κB by α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptors leads to transcription of p53 and cell death in dopaminergic neurons. Molecular pharmacology, 63(4), 784-790. https://doi.org/10.1124/mol.63.4.784