C. elegans とがんにおけるメトホルミンの成長阻害のための古代の統一メカニズム
Lianfeng Wu1, Ben Zhou1, Noriko Oshiro-Rapley2
1Department of Medicine, Diabetes Unit, Massachusetts General Hospital, Boston, MA 02114, USA; Center for Human Genetic Research, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Medicine, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA.
Cell
|December 17, 2016
まとめ
メトフォーミンは,核孔複合体 (NPC) とアシル- コア脱水素酵素家族10 (ACAD10) に影響を及ぼし,癌細胞の成長を抑制し,寿命を延長します. この保存された経路は 癌の新たな治療目標を示しています
科学分野:
- 細胞生物学
- 分子生物学
- 遺伝学
背景:
- メトホルミンは癌の予防と治療における潜在的効果が認められているが,その背後にあるメカニズムは完全に理解されていない.
- これらのメカニズムの解明は 治療戦略の最適化と 新薬標的の特定に不可欠です
研究 の 目的:
- メトホルミンががん細胞と寿命に及ぼす影響の分子機構を特定する.
- モデル生物からヒト細胞へのメトフォーミンの作用に関わる保存された経路を明らかにする.
主な方法:
- メトホルミン反応要素を特定するために,C. elegansの遺伝子スクリーニングを使用した.
- メトホルミンの作用機構における核孔複合体 (NPC) とACAD10の役割を調査した.
- ミトコンドリアの呼吸能力,GTPaseヘテロダイマー通過,mTORC1信号伝達に対するメトフォーミンの影響を評価した.
- メラノーマと臓がん細胞の生存能力とC. elegansの寿命に対するメトホルミンの効果を調べた.
主要な成果:
- NPCとACAD10をメトホルミン反応の重要な要素として特定した.
- ビグアニドはミトコンドリアの呼吸を阻害し,RagA-RagC GTPaseヘテロダイマーを通過することを示した.
- メトフォーミンはmTORC1のシグナル伝達を無効化し,ACAD10の転写誘導を引き起こします.
- 制限されたNPC通過とACAD10のアップレギュレーションは,メトホルミンの抗がん効果とC. elegansの寿命延長に不可欠であることを確認しました.
結論:
- NPC通過とACAD10のアップレギュレーションを含む保存された経路は,メトホルミンの抗癌および寿命延長効果を媒介する.
- この経路は,メトホルミンの二重作用について統一されたメカニズム的な説明を提供します.
- この経路に基づいてがん治療の新たな標的を特定した.
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