Abstract
To understand the function of Notch in the mammalian brain, we examined Notch1 signaling and its cellular consequences in developing cortical neurons. We found that the cytoplasmic domain of endogenous Notch1 translocated to the nucleus during neuronal differentiation. Notch1 cytoplasmic-domain constructs transfected into cortical neurons were present in multiple phosphorylated forms, localized to the nucleus and could induce CBF1-mediated transactivation. Molecular perturbation experiments suggested that Notch1 signaling in cortical neurons promoted dendritic branching and inhibited dendritic growth. These observations show that Notch1 signaling to the nucleus exerts an important regulatory influence on the specification of dendritic morphology in neurons.
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Acknowledgements
We thank Diane Hayward for providing us with CBF1 reporter constructs, Carrie Shawber and Libby Walker for the pCDNA3.FCDN1 plasmid, Donna Nofziger for affinity purification of the 93-4 antisera, Greg Sutcliffe for the NSE-CAT construct, Yuh-Nung Jan, Weimin Zhong and Connie Cepko for discussions and members of the Ghosh lab for comments on the manuscript. This work was supported by NIH grant NS36176 and the Pew Scholars Program (A.G.).
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Redmond, L., Oh, SR., Hicks, C. et al. Nuclear Notch1 signaling and the regulation of dendritic development . Nat Neurosci 3, 30–40 (2000). https://doi.org/10.1038/71104
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DOI: https://doi.org/10.1038/71104
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