PKM2イソフォーム特異的欠失は,腫瘍細胞におけるピルバートキナーゼに対する異なる要求を示している
William J Israelsen1, Talya L Dayton, Shawn M Davidson
1Koch Institute for Integrative Cancer Research at Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Cell
|October 15, 2013
まとめ
ピルーバートキナーゼM2 (PKM2) は腫瘍の成長に不可欠ではありません. その欠如は腫瘍形成を加速させ,PKM2が増殖するがん細胞と増殖しないがん細胞の異なる代謝ニーズを調節することを示している.
科学分野:
- 腫瘍学 腫瘍学
- 癌の代謝について
- 分子生物学は分子生物学である.
背景:
- ピルーバートキナーゼM2 (PKM2) は,がん代謝に関与しています.
- PKM2は,腫瘍の成長に不可欠なアナボリック経路を調節する.
研究 の 目的:
- 腫瘍の形成と成長にPKM2の必要性を調査する.
- 癌細胞の増殖と代謝におけるPKM2の役割を明らかにする.
主な方法:
- PKM2発現を廃止する条件付きアレルを持つマウスを生成した.
- Brca1-loss-driven mouse model for breast cancerを活用した. 乳がんに対する Brca1-loss-driven mouseモデルを活用した. 乳がんに対する Brca1-loss-driven mouseモデルを活用した.
- 増殖および非増殖腫瘍細胞におけるPKM2およびPKM1発現を分析した.
主要な成果:
- PKM2の消去は乳がん腫瘍形成を加速した.
- PKM2-null腫瘍は異質なPKM1発現を示した.
- 増殖細胞には検出可能なピルバートキナーゼが欠け,非増殖細胞はPKM1.1を表現した.
結論:
- 腫瘍細胞の増殖にはPKM2は必要ありません.
- PKM2活性調節は,腫瘍における代謝異質性を支持する.
- 発見は,ヒト腫瘍における変数PKM2発現と変異と一致しています.
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