エストロゲン依存型転写活性化のための強化RNAの機能的役割
Wenbo Li1, Dimple Notani, Qi Ma
1Howard Hughes Medical Institute, Department of Medicine, School of Medicine, University of California, San Diego, La Jolla, California 92093, USA.
Nature
|June 4, 2013
まとめ
エンハンサーRNA (eRNA) はエンハンサーから転写され,遺伝子調節に機能的な役割を果たします. この研究は,17β-エストラディオール (E2) が乳がん細胞におけるエストロゲン受容体α (ER-α) 標的遺伝子の活性化を強化するeRNAを誘導することを示しています.
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
- がん研究 がん研究
背景:
- 遺伝子増強剤は,遺伝子発現の調節に不可欠です.
- エンハンサーRNA (eRNA) はエンハンサーから転写されるが,その機能は不明である.
- 長い非コーディングRNA (lncRNAs) は,哺乳類の細胞で広く転写されています.
研究 の 目的:
- 遺伝子調節におけるeRNAの機能的役割を調査する.
- eRNAが機能しているのか,それともエンハンサーの活性化の副産物なのかを判断する.
- 乳がんにおける17β-エストラジオール (E2) 誘発遺伝子発現におけるeRNAの役割を調査する.
主な方法:
- ヒトの乳がん細胞におけるeRNA転写を研究した.
- E2結合エストロゲン受容体α (ER-α) が eRNA転写に及ぼす影響を調査した.
- エナセンサー・プロモーター・ループと遺伝子活性化におけるeRNAの役割を分析した.
- E2依存遺伝子の活性化にコヘシンが与える影響を調べました.
主要な成果:
- E2-bound ER-αは,E2-upregulated遺伝子の近くにある強化剤のeRNA転写をグローバルに増加させる.
- 誘導されたeRNAは,標的コード遺伝子のリガンド依存誘導を強化する.
- eRNAは,ER-α結合によって開始された強化剤-促進剤ループを強化する.
- コヘシンは,E2/ER-α/eRNA誘発のエンハンサー・プロモーター・ループを安定させ,遺伝子活性化に寄与する.
結論:
- eRNAは,遺伝子調節において重要な役割を果たす機能的トランスクリプトである.
- eRNAは,乳がんにおけるE2/ER-α誘発遺伝子転写の重要な媒介者である.
- eRNAは,様々な調節された遺伝子転写プログラムにおいて重要な役割を果たしている可能性が高い.
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