統合的ゲノムアプローチは,IKBKEを乳がんの腫瘍遺伝子の1つとして識別します
Jesse S Boehm1, Jean J Zhao, Jun Yao
1Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02115, USA.
Cell
|June 19, 2007
まとめ
ヒトの腫瘍遺伝子を特定することは,がんが蔓延しているため,難しい課題です.
科学分野:
- ゲノミクスゲノミクスとは
- がん生物学 がん生物学
- 分子腫瘍学 分子腫瘍学
背景:
- 人間の上皮がんは,複雑なカリオタイプの変化を示し,重要な腫瘍原性変異の識別を妨げます.
- 悪性変異の遺伝的要因を理解することは,標的を絞ったがん治療の開発に不可欠です.
研究 の 目的:
- 補完的なゲノム学的アプローチを統合することによって,新しいヒト腫瘍遺伝子を特定する.
- 細胞変容における信号伝達経路の協力的な役割を解明する.
- 乳がんの発症および進行における特定されたキナーゼの機能を調査する.
主な方法:
- 腫瘍遺伝子の発見のための補完的なゲノム技術の統合.
- 活性化キナーゼのライブラリを利用して,フォスファティディル・イノシトール3キナーゼ (PI3K) 信号伝達を代替できるものを特定しました.
- 遺伝子増幅や過剰発現を検出するために全ゲノム構造分析を行った.
主要な成果:
- ERKとPI3Kのシグナル伝達経路の協同活性化により,ヒトの細胞が変化します.
- PI3Kのシグナル伝達を代替するいくつかのキナーゼを特定し,腫瘍発生性を誘導しました.
- IKBKE (IKKepsilon) は,乳がん細胞系と腫瘍で増幅され過剰に発現し,その抑制は細胞死を引き起こす.
- IKKepsilonは,乳がんモデルにおける核因子-kappaB (NF-kappaB) 経路を活性化する.
結論:
- この研究では,IKKepsilonが乳がんにおける新たな腫瘍遺伝子の1つであると示唆されています.
- 乳がんにおけるNF-kappaB経路活性化のためのメカニズムを提供し,PI3K信号伝達の潜在的に下流である.
- 腫瘍遺伝子の発見のための統合型ゲノム学的アプローチの有用性を実証.
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