Cell-cycle-specific nestin expression coordinates with morphological changes in embryonic cortical neural progenitors

Takehiko Sunabori, Akinori Tokunaga, Takeharu Nagai, Kazunobu Sawamoto, Masaru Okabe, Atsushi Miyawaki, Yumi Matsuzaki, Takaki Miyata, Hideyuki Okano

研究成果: Article査読

48 被引用数 (Scopus)

抄録

During brain development, neural progenitor cells extend across the thickening brain wall and undergo mitosis. To understand how these two completely different cellular events are coordinated, we focused on the transcription pattern of the nestin gene (Nes), which encodes an intermediate filament protein strongly expressed in neural progenitor cells. To visualize nestin expression in vivo, we generated transgenic mice that expressed a destabilized fluorescent protein under the control of Nes second intronic enhancer (E/nestin:dVenus). During the neurogenic stage, when the brain wall thickens markedly, we found that nestin was regulated in a cell-cycle-dependent manner. Time-lapse imaging showed that nestin gene expression was upregulated during G1-S phase, when the neural progenitor cells elongate their fibers. However, nestin expression dramatically declined in G2-M phase, when progenitor cells round up to undergo mitosis. The cell-cycle-dependent phosphorylation of an upstream regulator class III POU transcription factor (Pou3f2 or Brn2) reduced its binding activity to the nestin core enhancer element and was therefore responsible for the decreased Nes transcription in G2-M phase. Collectively, these findings demonstrate precisely orchestrated gene regulation that correlates with the 3D morphological changes in neural progenitor cells in vivo.

本文言語English
ページ(範囲)1204-1212
ページ数9
ジャーナルJournal of Cell Science
121
8
DOI
出版ステータスPublished - 2008 4 15

ASJC Scopus subject areas

  • Cell Biology

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