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メタスタシス抑制剤のトランスクリプトは,mRNAヘアピンスのTARBP2結合によって不安定化します
Hani Goodarzi1, Steven Zhang1, Colin G Buss1
1Laboratory of Systems Cancer Biology, Rockefeller University, 1230 York Avenue, New York, New York 10065, USA.
Nature
|July 22, 2014
まとめ
研究者らは,乳がんの転移に影響を与える新しいRNA構造 (sRSEs) を発見した. TARBP2タンパク質はこれらの元素を結合し,重要な遺伝子を不安定化し,がんの拡散を促進し,新たな治療標的を明らかにします.
科学分野:
- 分子生物学は分子生物学である.
- がん研究 がん研究
- RNA 生物学 RNA 生物学
背景:
- 異常なRNAの安定性調節は,がんの進行を含む疾患において極めて重要です.
- mRNAを標的とするマイクロRNAは,転写後の調節因子として知られていますが,がんにおける構造的なmRNA要素の役割は未知のものです.
研究 の 目的:
- 乳がんにおけるmRNA安定性の新規の転写後の調節剤を特定する.
- 癌の転移におけるRNA構造要素の役割を調査する.
主な方法:
- ヒト乳がん同位体系における全ゲノムトランスクリプトの安定性測定.
- RNAの配列と構造の空間を検索するためのコンピューティング・フレームワーク.
- トランスファクターを結合するRNAの構造要素を特定するための生化学的アプローチ.
主要な成果:
- 転移性細胞に過剰に存在するGC豊富な構造RNA安定性要素 (sRSEs) の発見.
- TARBP2をトランスファクター結合sRSEsおよび類似要素 (TBSEs) として識別する.
- 転移細胞や腫瘍におけるTARBP2過剰発現は,転移抑制遺伝子のAPPとZNF395を不安定化し,侵入と植民を促します.
結論:
- TARBP2は,mRNA構造要素を結合し,不安定化を促すことで,遺伝子調節における非正規的な役割を果たします.
- 構造要素による制御されたRNAの不安定化は,がんの進行を制御する.
- APPとZNF395は乳がんの新型転移抑制剤として機能する.
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