Smad3変異マウスは,転移性大腸がんを発症する
Y Zhu1, J A Richardson, L F Parada
1Center for Developmental Biology, UT Southwestern Medical Center, Dallas, Texas 75235-9133, USA.
Cell
|September 30, 1998
まとめ
成長因子β (TGFβ) 信号の変換は,細胞プロセスにとって極めて重要です. ネズミのSmad3遺伝子の破壊は,攻撃的な結腸直腸がんの発達につながり,ヒトの病気のための新しいモデルを提供します.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- 腫瘍学 腫瘍学
背景:
- 変形成長因子β (TGFβ) 信号伝達経路は,重要な細胞機能を調節する.
- Smadタンパク質 (Smad2,Smad3,Smad4) は,TGFβ信号伝導の主要な媒介者である.
- TGFβシグナル伝達の不調は,がんを含む様々な病気と関連しています.
研究 の 目的:
- TGFβシグナル伝達におけるSmad3の役割を調査する.
- Smad3欠乏性のマウスを生成し,特徴づけること.
- Smad3の障害が結腸直腸がんの発症に与える影響を判断する.
主な方法:
- マウスSmad3遺伝子のクローニングと標的の破壊.
- Smad3 ミュータントマウスの世代.
- Smad3変異マウスのフェノタイプ分析,腫瘍の発達と転移を含む.
主要な成果:
- Smad3変異マウスは生存可能であり,肥沃である.
- Smad3変異マウスは4〜6ヶ月間,自発的な結腸直腸腺がんを発症する.
- 腫瘍は腸壁に浸透し,リンパ節転移を示します.
結論:
- Smad3によって媒介されるTGFβシグナル伝達は,大腸がんの予防に重要な役割を果たします.
- Smad3欠乏は,結腸直腸がんの病原性におけるTGFβシグナル伝達に直接関与しています.
- Smad3変異マウスは,ヒトの結腸直腸がんの研究に貴重な動物モデルを提供している.
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