Regulated secretion of amyloid precursor protein by TrkA receptor stimulation in rat pheochromocytoma-12 cells is mitogen activated protein kinase sensitive

Steffen Roßner, Uwe Ueberham, Reinhard Schliebs, J. Regino Perez-Polo, Volker Bigl

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    13 Scopus citations


    We have shown recently in the pheochromocytoma PC-12 cell line, that the activation of the high-affinity receptor for nerve growth factor (NGF), tyrosine kinase receptor (TrkA), results in increased secretion of the amyloid precursor protein (APP) into the culture medium. In order to reveal through which TrkA-associated signaling pathway the secretory APP processing is mediated, signaling cascades activated by TrkA stimulation were selectively inhibited under conditions of selective TrkA stimulation via non- NGF mechanisms and APP secretion into the culture medium was followed by Western analysis. Our data demonstrate, that activation of mitogen activated protein (MAP) kinase alone is sufficient to promote APP secretion, whereas inhibition of MAP kinase will reduce APP secretion only when phospholipase Cγ or phosphatidylinositol 3-kinase are additionally inhibited. This suggests that pharmacological manipulations activating the MAP kinase pathway may result in increased secretory APP processing.

    Original languageEnglish (US)
    Pages (from-to)97-100
    Number of pages4
    JournalNeuroscience Letters
    Issue number2
    StatePublished - Aug 20 1999



    • Alzheimer's disease
    • Amyloid precursor protein
    • Mitogen activated protein kinase
    • Nerve growth factor
    • Phosphatidylinositol 3-kinase
    • Phospholipase Cg
    • Tyrosine kinase receptor A

    ASJC Scopus subject areas

    • Neuroscience(all)

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