プライマリ・シリウム・オートファギー・Nrf2 (PAN) 軸の活性化により,ヒト胚幹細胞はニューロエクトダームの運命に左右される
Jiwon Jang1, Yidi Wang1, Matthew A Lalli1
1Department of Molecular Cellular Developmental Biology, Neuroscience Research Institute, University of California, Santa Barbara, Santa Barbara, CA 93106, USA.
Cell
|March 30, 2016
まとめ
人間の胚性幹細胞 (hESC) は,プライマリ・シリウム・オートファギー・Nrf2 (PAN) 軸経由で神経内皮 (NE) に分化する. この経路は細胞サイクルと多能性遺伝子の発現を制御し 早期の神経発達を誘導します
科学分野:
- 幹細胞生物学
- 発達生物学
- セル・シグナル
背景:
- 人間の胚性幹細胞 (hESC) は,メゼンドーム (ME) またはニューロエクトーム (NE) に分化します.
- 初期の系統の仕様には 細胞サイクルの変化や 毛皮形成パターンが含まれます
研究 の 目的:
- hESCにおける初期神経エクトダーマ (NE) 運命を決定する分子機構を特定する.
- hESCの分化に直接作用するプライマリ・シリア,オートファギー,Nrf2の役割を解明する.
主な方法:
- 定義された条件下でhESCの微分化を誘導する.
- 毛皮形成パターン,細胞サイクル進行 (G1延長),遺伝子発現 (OCT4,NANOG,Nrf2) の分析
- オートファジー誘導とそのNrf2およびプラリポテンシー因子に関する研究.
主要な成果:
- 神経マーカーの発現に先立ち, 系統誘導から24時間以内に異なったシリアーションパターンが出現した.
- 2日目までにNrf2を無効化するオートファギーを誘発した.
- Nrf2の不活性化により,OCT4とNANOGの抑制が緩和され,NEの誘導が促進された.
- Nrf2抑制により,患者誘発多能幹細胞 (iPSC) の神経生成が回復した.
- 神経前駆マーカーはこれらの上流イベントの後に発現しました.
結論:
- 細胞サイクル進行に関連した新しいプライマリシリウム-オートファギー-Nrf2 (PAN) コントロール軸は,hESCの分化をニューロエクトダーム (NE) の運命に向けます.
- この軸は,正規の神経前駆体マーカー発現の上流に作用する.
- PAN軸は早期の神経発達の重要な規制メカニズムを提供し,iPSCの神経生成の改善のターゲットである可能性があります.
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