ETV1は系統生存因子であり,消化器系ストロマル腫瘍においてKITと協力する
1Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA.
Nature
|October 8, 2010
まとめ
胃腸筋腫瘍 (GIST) は,高ETV1発現を有するカジャル (ICCs) の間位細胞から発生する. 活性化KIT変異はETV1と協力し,腫瘍性ETSの転写プログラムを駆動し,GISTの発達を促進します.
科学分野:
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- 胃腸筋腫瘍 (GIST) は,最も一般的なヒト肉腫です.
- GISTは,KITまたはPDGFRA受容体チロシンキナーゼの変異を活性化することによって特徴付けられます.
- Cajalのインタースティシャル細胞 (ICCs) は,GIST.の推定起源細胞である.
研究 の 目的:
- GISTの発達と腫瘍発生におけるETV1の役割を調査する.
- GIST.でETV1,ICC,KIT変異の関係を特定する.
- GISTにおける腫瘍性転写因子活性化のメカニズムを解明する.
主な方法:
- ICCサブタイプとGISTサンプルにおけるETV1発現の分析.
- ICC開発とGIST細胞系成長のためのETV1要件の評価.
- ETV1の結合部位のトランスクリプトームプロファイリングと分析.
- 活性化されたKITによるETV1の規制を調査する.
主要な成果:
- ETV1は,KITに敏感なICCで高度に発現しており,その開発に不可欠です.
- ETV1はGISTで普遍的に発現し,イマチニブに敏感なGIST細胞系と耐性GIST細胞系の両方の成長に不可欠です.
- ETV1はICC-GIST特有のトランスクリプションネットワークのマスターレギュレータとして機能し,主にエンハンサー・バインディングを通じて機能します.
- 活性化されたKITは,ETV1のタンパク質の安定性を延長し,腫瘍発生においてETV1と協力する.
結論:
- GISTは,高固有のETV1発現を有するICCから発生します.
- 活性化されたKIT変異は,高いETV1レベルと組み合わせて,GISTを駆動する腫瘍性ETS転写プログラムを開始します.
- この研究は,他のETS依存性腫瘍とは異なるGISTにおける腫瘍性転写因子活性化の新しいメカニズムを明らかにしています.
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Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
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When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...

