WNT媒介のTCF/LEF転写因子の遺伝子発現は,初期のヒトの多能性および細胞系において,歯類のパラダイムとは異なる
Connor Ross1, Paula A Balestrini2, Lawrence E Bates3
1Institute of Medical Sciences, Foresterhill Health Campus, University of Aberdeen, AB25 2ZD, UK.
Journal of cell science
|August 22, 2025
まとめ
人間の胚性幹細胞の研究は,マウスと比較して異なるWNT/β-カテニンのシグナル伝達を必要としていることを示しています. TCF/LEF遺伝子の発現は人間の発達段階によって異なるため,シグナル伝達要件に影響します.
科学分野:
- 発達生物学
- 幹細胞生物学
- 分子信号
背景:
- WNT/β-カタニンのシグナル伝達は胚の発達に不可欠ですが,その役割はマウスとヒトの多能幹細胞の間で異なります.
- TCF/LEFの転写因子は,WNT経路の出力を媒介し,信号調節の研究の重要なターゲットとなっています.
研究 の 目的:
- 初期のヒト発達モデルにおけるTCF/LEF遺伝子の調節,発現,および局所化を調査する.
- ヒトとマウスの多能幹細胞におけるWNT/β-カテニンの信号伝達成分を比較する.
主な方法:
- TCF/LEF遺伝子発現とヒトのナイヴとプライムされた多能幹細胞におけるタンパク質局所化の分析.
- 早期発達のモデルとしてブラストイドと移植前のヒトブラストシストの検査.
主要な成果:
- 人間とマウスの多能幹細胞の間で,TCF/LEF遺伝子発現の有意な違いが観察されました.
- ヒトの先天性幹細胞は,マウスに比べてTCF7L1の発現率が低い.
- TCF7L2は,トロフェクトダーム,ブラストイド,およびブラストキストで高度に発現し,TCF7およびLEF1は,プライム細胞におけるガストリュレーションマーカーで誘発される.
結論:
- 人間のTCF/LEF遺伝子発現パターンは,初期の人間の発達中の状態に依存し,差異的なWNT/β-カタニンシグナル要求を示しています.
- これらの発見は,胚の発達シグナル伝達経路における種別差異を強調しています.
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