細胞-マトリックスインターフェースは,ヒトの大腸がん幹細胞の休眠状態を調節する
Yuki Ohta1, Masayuki Fujii1, Sirirat Takahashi1
1Department of Organoid Medicine, Sakaguchi Laboratory, Keio University School of Medicine, Tokyo, Japan.
Nature
|July 7, 2022
まとめ
癌幹細胞 (CSCs) は,化学療法後に再発を引き起こす可能性があります. 休眠状態を維持するp27とCOL17A1を発現するLGR5+CSCを特定しました. YAPシグナル伝達を阻害すると,CSCが休眠状態から抜け出すのを阻害することで再発を防ぐことができます.
科学分野:
- 腫瘍学
- 細胞生物学
- 癌 幹 細胞 研究
背景:
- 化学療法後の再発は 主な死因です
- 癌幹細胞 (CSC) は再発に関与しているが,実験プラットフォームが限られているため,その動態は十分に理解されていない.
- 既存の研究では,治療中のCSCの行動を追跡するための空間時間的な解像度が不足しています.
研究 の 目的:
- CSCのダイナミクスの将来的な分析のための生きた遺伝的系統追跡システムを開発する.
- 大腸がんにおける化学抵抗とがん再発のメカニズムを特定する.
- CSCの休眠状態を標的とした治療戦略を探求する.
主な方法:
- ヒトの結腸直腸がんの系統追跡システムを開発した.
- 細胞内画像を用いて 細胞の行動を追跡した.
- トランスクリプトーム分析と遺伝子ノックアウト (COL17A1) 実験を行った.
- CSCの休眠状態におけるFAK-YAP信号の役割を調査した.
主要な成果:
- 化学反応のない状態でp27を発現する眠っているLGR5+がん幹細胞 (CSCs) を特定した.
- 化学療法中にLGR5+p27+CSCの持続性とクローン拡張が実証された.
- 休眠状態のCSCでCOL17A1のアップレギュレーションが発見され,これは細胞-マトリックスインターフェイスを通じて休眠状態を維持するために不可欠です.
- 化学療法によって COL17A1が破壊され FAK-YAP信号が活性化され 休眠状態が破られる
- YAPのシグナル伝達抑制により,CSCが休眠状態から離脱し,腫瘍の再発が遅れた.
結論:
- 眠っているLGR5+p27+CSCは,COL17A1と細胞マトリックスインターフェースによって維持され,化学療法への抵抗と再発に責任があります.
- 化学療法によって誘発されたFAK- YAPの活性化により,CSCは休眠状態から脱出する.
- YAPシグナルをターゲットにすることで 大腸がんの再発を予防する 有望な治療戦略が生まれます
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