プラズマ膜V-ATPaseは,腫瘍性RAS誘発のマクロピノサイトーシスを制御する
Craig Ramirez1, Andrew D Hauser1, Emily A Vucic1
1Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY, USA.
Nature
|December 13, 2019
まとめ
腫瘍性RASは,真空 ATPase (V-ATPase) を移転することによって,栄養素吸収過程であるマクロピノサイトーシスを活性化します. この発見は,RAS変異性腫瘍とその代謝依存症を標的とする新しい経路を示しています.
科学分野:
- 分子生物学
- 細胞生物学
- 腫瘍学
背景:
- 腫瘍性RAS変異は細胞代謝を変化させることで腫瘍の成長を促す.
- マクロピノサイトーシスは,RAS変異がん細胞によって利用される重要な栄養素吸収メカニズムです.
- 腫瘍性RASとマクロピノサイトーシスの誘導を結びつける分子メカニズムは不明である.
研究 の 目的:
- RAS誘発のマクロピノサイトーシスの分子調節体を特定する.
- 腫瘍性RASとマクロピノサイトーシスの活性化を結びつける経路を解明する.
主な方法:
- RAS誘発のマクロピノサイトーシスにおける真空 ATP 酵素 (V-ATP 酵素) の役割を調査した.
- バイオケミカルと 細胞画像技術を使って V-ATPaseの取引を追跡した
- タンパク質キナーゼAと溶解性アデニラートサイクラスの関わりを調査した.
主要な成果:
- RAS誘発のマクロピノサイトーシスの重要なレギュレータとしてV-ATPaseを特定した.
- 腫瘍性RASがV-ATPaseの転位をプラズマ膜に促進することを実証した.
- タンパク質キナーゼAとビカルボネート依存性の溶解性アデニラートサイクラスがV-ATPaseの輸送を制御する経路を発見した.
- このV-ATPaseの蓄積は,RAC1の活性化およびその後のマクロピノサイトーシスに不可欠である.
結論:
- V-ATPaseの取引とRAS主導のマクロピノサイトーシスの間の新しいリンクを確立しました.
- この経路は,RAS変異性腫瘍の潜在的治療標的である.
- このメカニズムの理解は 癌細胞の代謝適応を克服するのに役立ちます
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