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HSF1は熱ショックとは異なるトランスクリプションプログラムを駆動し,高悪性ヒトがんをサポートします
Marc L Mendillo1, Sandro Santagata, Martina Koeva
1The Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA.
Cell
|August 7, 2012
まとめ
熱ショック因子1 (HSF1) は,熱ショックタンパク質を超えた遺伝子を独特に調節することによって癌を誘発する. このHSF1がんプログラムは,腫瘍に活性化し,転移と患者の死亡に関連しています.
科学分野:
- 分子生物学は分子生物学である.
- 腫瘍学 腫瘍学
- 遺伝学 遺伝学とは
背景:
- 熱ショック因子1 (HSF1) は,熱ショック反応の主な調節因子である.
- HSF1は悪性変異,がん細胞生存,および増殖に関与しています.
- HSF1が悪性腫瘍で制御する正確な転写ネットワークと,熱ショック反応との関連性は,未だに定義されていない.
研究 の 目的:
- 高悪性細胞に特有のHSF1調節された転写プログラムを定義する.
- このプログラムと正規の熱ショック反応の関係を調査する.
- ヒトがんにおけるこのプログラムの活動と予後的重要性を評価する.
主な方法:
- 異なる悪性潜在的な細胞とその非変異細胞の比較分析.
- HSF1-調節遺伝子を識別するためのトランスクリプトミックプロファイリング.
- 患者からの腫瘍サンプル (乳房,結腸,肺) でのHSF1プログラム活動の分析.
主要な成果:
- 熱ショックとは異なるHSF1調節された転写プログラムが,高悪性細胞で特定されました.
- このがん特有のプログラムには,細胞サイクル調節,シグナル伝達,代謝,粘着,翻訳に関与する遺伝子が含まれる.
- 熱ショックタンパク質 (HSP) 遺伝子は,このプログラムの一部ですが,多くの遺伝子は悪性腫瘍において独特に調節されています.
- HSF1がんプログラムは,ヒトの乳腺,結腸,肺腫瘍に活性であり,転移と死亡率と相関しています.
結論:
- HSF1は,腫瘍発生中にトランスクリプトームを活性的に再配線し,明確な癌プログラムを確立します.
- このHSF1主導のプログラムは,癌の転移と患者の生存に重大な予後影響を及ぼします.
- この発見は,HSF1がんプログラムを標的とした潜在的な治療戦略を示唆しています.
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