Visualization of spatiotemporal activation of Notch signaling: Live monitoring and significance in neural development

Jun Kohyama, Akinori Tokunaga, Yuko Fujita, Hiroyuki Miyoshi, Takeharu Nagai, Atsushi Miyawaki, Keiko Nakao, Yumi Matsuzaki, Hideyuki Okano

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Notch signaling plays various key roles in cell fate determination during CNS development in a context-dependent fashion. However, its precise physiological role and the localization of its target cells remain unclear. To address this issue, we developed a new reporter system for assessing the RBP-J-mediated activation of Notch signaling target genes in living cells and tissues using a fluorescent protein Venus. Our reporter system revealed that Notch signaling is selectively activated in neurosphere-initiating multipotent neural stem cells in vitro and in radial glia in the embryonic forebrain in vivo. Furthermore, the activation of Notch signaling occurs during gliogenesis and is required in the early stage of astroglial development. Consistent with these findings, the persistent activation of Notch signaling inhibits the differentiation of GFAP-positive astrocytes. Thus, the development of our RBP-J-dependent live reporter system, which is activated upon Notch activation, together with a stage-dependent gain-of-function analysis allowed us to gain further insight into the complexity of Notch signaling in mammalian CNS development.

Original languageEnglish
Pages (from-to)311-325
Number of pages15
JournalDevelopmental Biology
Volume286
Issue number1
DOIs
Publication statusPublished - 2005 Oct 1

Keywords

  • Astrocyte
  • EGFP
  • Gliogenesis
  • Hes1
  • Neural progenitors
  • Neural stem cell
  • Notch
  • RBP-J
  • Self-renewal
  • Venus

ASJC Scopus subject areas

  • Molecular Biology
  • Developmental Biology
  • Cell Biology

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