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LEF1とHOXB9を通じたWNT/TCF信号は,肺腺癌の転移を媒介する
Don X Nguyen1, Anne C Chiang, Xiang H-F Zhang
1Cancer Biology and Genetics Program, Memorial Sloan-Kettering Cancer Center, New York, NY, USA.
Cell
|July 7, 2009
まとめ
WNT/TCF経路は,肺腺癌の急速な転移を脳と骨へと誘導する. この経路,特にHOXB9とLEF1を標的にすることで,がんの拡散を抑制することがあります.
科学分野:
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
- 癌の転移 メタスタシス
背景:
- 肺腺がんは,複数の臓器に急速に転移することがあります.
- この急速な転移能力を駆動する根本的なメカニズムは,依然としてほとんど不明です.
- これらのメカニズムを理解することは,効果的な治療戦略の開発に不可欠です.
研究 の 目的:
- 急速な肺アデノカルシノーマ転移の原因となる分子機構を特定する.
- 脳と骨の転移におけるWNT/TCF経路の役割を調査する.
- 媒介性転移に関与する特定のWNT/TCF標的遺伝子を決定する.
主な方法:
- 一次性肺腺がんにおける遺伝子発現シグネチャーの分析.
- 細胞系から転移したサブ集団の分離と特徴付け.
- WNT/TCF経路調節が転移に与える影響を評価するために,マウスモデルを使用したインビボ試験.
- WNT/TCF標的遺伝子の識別と検証.
主要な成果:
- 定規のWNT/TCF経路の活性化は,肺腺癌が脳や骨に転移する際の重要な決定因子です.
- WNT/TCF経路の活性化シグネチャーは,原発性腫瘍における多臓器再発と相関しています.
- 超活性なWNT/TCF経路が転移したサブ集団で観察されました.
- TCFの活性低下は,原発腫瘍の成長とは無関係に,マウスの脳と骨転移の形成能力を低下させた.
- HOXB9とLEF1は,侵略と植民地化を媒介する重要なWNT/TCF標的遺伝子として特定されました.
結論:
- WNT/TCFシグナル伝達経路は,肺腺癌細胞が脳や骨に転移することを可能にする上で重要な役割を果たします.
- 特定のWNT/TCF標的遺伝子であるHOXB9とLEF1は,この転移過程の重要な媒介者である.
- WNT/TCF経路とその下流エフェクターをターゲットにすることで,肺アデノカルシノーマの転移を抑制する潜在的な治療戦略が提示されます.
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