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RHOJは,EMTに関連した化学療法に対する耐性を制御する
Maud Debaugnies1,2, Sara Rodríguez-Acebes3, Jeremy Blondeau1
1Laboratory of Stem Cells and Cancer, Université Libre de Buxelles (ULB), Brussels, Belgium.
Nature
|March 23, 2023
まとめ
エピテリアからメゼンキマへの移行 (EMT) を受けているがん細胞は,治療に抵抗します. 小さなGTPase RHOJはDNA修復を強化し,化学療法のための新しい治療標的を提供することで,この抵抗を駆動します.
科学分野:
- 腫瘍学
- 分子生物学
- 癌 研究
背景:
- 癌の治療抵抗は患者の死亡率につながる.
- Epithelial- to- mesenchymal transition (EMT) は,様々ながんの治療耐性に関連している.
- EMTによる治療に対する抵抗のメカニズムは完全に理解されていません.
研究 の 目的:
- 抗がん療法に対する耐性を媒介するEMTの役割を調査する.
- EMTに関連する治療に対する抵抗を誘発する分子メカニズムを特定する.
- 耐性がんの治療対象としてRHOJを研究する.
主な方法:
- 皮の状細胞がんのマウスモデルを用いて,自発的なEMTを行いました.
- in vivoとin vitroで機能の獲得と喪失に関する研究を行いました.
- ゲノム全体のトランスクリプトミックとプロテオミックプロファイリングを実施した.
- 核アクチン調節タンパク質とRHOJの相互作用を調査した.
主要な成果:
- EMT腫瘍細胞は複数の抗がん療法に対して高い耐性を示した.
- RHOJは,EMTがん細胞で高い発現率を持つ小さなGTPaseであり,治療抵抗性の主要な調節因子として特定されました.
- RHOJは複製性ストレスに対する反応を強化し,DNA損傷反応経路を活性化し,化学療法に対する耐性を促進します.
- アクチンポリメリゼーションの抑制は,RHOJに依存した方法で,EMT細胞を化学療法に敏感にします.
結論:
- RHOJは,EMTに関連した化学療法抵抗性の重要なレギュラーです.
- RHOJはDNA修復メカニズムの強化によって抵抗性を促進します.
- RHOJまたはアクチンポリメリゼーションをターゲットにすることで,EMT陽性がんの治療抵抗を克服することができます.
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