サイクリンD1によるエストロゲン受容体のCDK独立活性化
R M Zwijsen1, E Wientjens, R Klompmaker
1Department of Tumor Biology, Netherlands Cancer Institute (Antoni van Leeuwenhoekhuis), Amsterdam.
Cell
|February 7, 1997
まとめ
サイクリンD1は,CDKパートナーとは独立して,エストロゲン受容体 (ER) の活性と遺伝子転写を強化する. この新しい機能は,エストロゲンなしででも,乳房細胞の成長調節を強化します.
科学分野:
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
- エンドクリノロジー エンドクリノロジー
背景:
- エストロゲンとサイクリンD1は乳腺上皮細胞増殖の重要な調節剤である.
- エストロゲン受容体 (ER) 信号伝達は,エストロゲン反応性組織の成長に重要な役割を果たします.
研究 の 目的:
- エストロゲン反応性組織の成長調節におけるサイクリンD1の新たな役割を調査する.
- サイクリンD1がエストロゲン受容体媒介遺伝子転写に影響を与えるメカニズムを解明する.
主な方法:
- エストロゲン受容体の転写活性を測定するアッセイ.
- 同免疫プレシピテーションは,サイクリンD1とER.との間の物理的結合を検出する.
- エストロゲン反応要素 (EREs) に結合するERの分析.
主要な成果:
- サイクリンD1は,CDKパートナーとは独立して,ER媒介の転写を強化する.
- サイクリンD1は,エストロゲンの存在と欠如においてER転写を活性化します.
- サイクリンD1は,ERホルモン結合ドメインに直接結合し,EREsへの受容体結合を強化する.
- この活性化は,抗エストロゲンによって阻害されません.
結論:
- サイクリンD1は,エストロゲン受容体の新しいCDK独立活性化剤として作用する.
- サイクリンD1とERの相互作用により,遺伝子転写が強化され,乳腺上皮細胞の成長調節に影響を与えます.
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