v-erbA腫瘍遺伝子の活性化により,c-erbAのホルモン依存の調節活性が失われる
Cell
|June 15, 1990
まとめ
v-erbA腫瘍遺伝子は,赤血球の分化を阻害する. 過剰発現した甲状腺ホルモン受容体c-erbAは,このプロセスを調節しますが,v-erbAはC端末の変化により,ホルモン依存の調節を失います.
科学分野:
- 分子生物学は分子生物学である.
- 腫瘍学 腫瘍学
- エンドクリノロジー エンドクリノロジー
背景:
- v-erbA腫瘍遺伝子は,赤血球分化阻害と赤血球特異遺伝子転写抑制に関与しています.
- 甲状腺ホルモン受容体は,細胞の分化と遺伝子発現に役割を果たします.
研究 の 目的:
- 甲状腺ホルモン受容体c-erbAが赤色素の分化に果たす役割を調査する.
- v-erbA腫瘍遺伝子が赤血球の分化に干渉するメカニズムを解明する.
主な方法:
- 過剰発現したc-erbAのレトロウイルスの導入により,赤色素体細胞に.
- 機能ドメインをマッピングするために,キメリックv-/c-erbAタンパク質の分析.
- エリソイド分化とエリトロサイト特異遺伝子発現の評価.
主要な成果:
- 過剰発現したc-erbAは,T3に依存した方法で,赤血球の分化と遺伝子発現を調節する.
- 固有のc-erbAは,赤血球の分化に有意な影響を及ぼさない.
- v-erbA腫瘍遺伝子はT3依存の調節を失うが,構成的に転写を抑制する.
結論:
- v-erbAオンコタンパク質は,甲状腺ホルモン受容体の機能を変化させ,特にT3依存の調節を失う.
- 保存された残留物を含むc-erbAのC末端領域は,ホルモン依存性の活性に不可欠であり,v-erbAでは変化しています.
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