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Nerve growth factor enhances the CRE-dependent transcriptional activity activated by nobiletin in PC12 cells

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Prevention and treatment of Alzheimer disease are urgent problems for elderly people in developed countries. We previously reported that nobiletin, a poly-methoxylated flavone from the citrus peel, improved the symptoms in various types of animal models of memory loss and activated the cAMP responsive element (CRE)-dependent transcription in PC12 cells. Nobiletin activated the cAMP/PKA/MEK/Erk/MAPK signaling pathway without using the TrkA signaling activated by nerve growth factor (NGF). Here, we examined the effect of combination of nobiletin and NGF on the CRE-dependent transcription in PC12 cells. Although NGF alone had little effect on the CRE-dependent transcription, NGF markedly enhanced the CRE-dependent transcription induced by nobiletin. The NGF-induced enhancement was neutralized by a TrkA antagonist, K252a. This effect of NGF was effective on the early signaling event elicited by nobiletin. These results suggested that there was crosstalk between NGF and nobiletin signaling in activating the CRE-dependent transcription in PC12 cells.
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Keywords: Alzheimer disease; CRE-dependent transcription; PC12 cells; cellules PC12; facteur de croissance neuronal; flavone; maladie d’Alzheimer; nerve growth factor; neuron; neurone; nobiletin; nobilétine; transcription dépendante des CRE

Document Type: Research Article

Publication date: January 1, 2016

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