酸化代謝は,腫瘍発生中の神経幹細胞の不死化を促す
François Bonnay1, Ana Veloso2, Victoria Steinmann1
1Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), 1030 Vienna, Austria.
Cell
|September 11, 2020
まとめ
ミトコンドリア融合によって誘発される 代謝再プログラムが 腫瘍発起細胞 (TIC) の不滅化に不可欠です 酸化性リン酸化 (OxPhos) を伴うこのプロセスは,がんの発生に不可欠です.
科学分野:
- 腫瘍学
- 細胞の代謝
- ミトコンドリア生物学
背景:
- 代謝の再プログラミングは癌の特徴ですが 腫瘍形成の開始におけるその役割は十分に理解されていません
- 腫瘍発起細胞 (TIC) は,持続的な成長と増殖のために特定の代謝適応を必要とします.
- 早期の腫瘍形成の代謝要因を理解することは,標的治療の開発に極めて重要です.
研究 の 目的:
- 腫瘍発起細胞 (TIC) の不死化における代謝再プログラム,特に酸化性リン酸化 (OxPhos) の役割を調査する.
- ミトコンドリア融合とOxPhosが癌の発症の速度を制限するステップであるかどうかを判断する.
- TIC と発端神経幹細胞 (NSC) の代謝要件を解明する.
主な方法:
- ドロソフィラの脳腫瘍の細胞集団を特定するための単細胞トランスクリプトミクス
- 標的メタボロミクスと in vivo 遺伝子スクリーニングにより,代謝依存性を評価する.
- 生体内NADH/NAD+センサで 不死期中の代謝活動を監視します
- ミトコンドリア融合とオックスフォスをブロックする 遺伝子操作だ
主要な成果:
- ドロソフィラの脳腫瘍は,OxPhosが増加すると,急速に分裂する幹細胞集団を示します.
- OxPhosはTICの不死化には不可欠ですが,最初の腫瘍形成神経幹細胞 (NSC) には欠かせません.
- OxPhosまたはミトコンドリア融合を阻害すると,NAD+の再生を阻害して,TICの不死化を防止し,静止状態につながります.
結論:
- ミトコンドリア融合による代謝再プログラムが TIC 永続化の速度を制限するステップです
- 酸化性リン酸化は,腫瘍形成への不可逆的な献身のための重要な代謝経路です.
- この研究は 細胞代謝と 腫瘍発生細胞の不死との間にある 直接的な関係を明らかにしています
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