lncRNAの明確な処理は,幹細胞の非保存機能に寄与する
Chun-Jie Guo1, Xu-Kai Ma2, Yu-Hang Xing1
1State Key Laboratory of Molecular Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, University of the Chinese Academy of Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai 200031, China.
Cell
|April 8, 2020
まとめ
長い非コーディングRNA (lncRNAs) は急速に進化する. この研究は,ヒトとマウスの胚性幹細胞 (ESC) が lncRNA を異なる方法で処理し,局所化させ,多能性およびWNTシグナル伝達に影響することを明らかにしています.
科学分野:
- 分子生物学
- 遺伝学
- 発達生物学
背景:
- 長い非コーディングRNA (lncRNAs) は,メッセンジャーRNA (mRNAs) に比べて急速な進化を示している.
- lncRNAの処理,サブセルラー局所化,および種間の機能の保存は,大部分未調査のままである.
- 胚性幹細胞 (ESC) の多能性は,発達生物学の研究の重要な分野である.
研究 の 目的:
- 保存された lncRNAs が保存された処理,局所化,および機能を経験するかどうかを調査する.
- 人間のESC (hESC) とマウスのESC (mESC) でのlncRNAsの亜細胞局在を比較する.
- hESC 多能性における異なる lncRNA 局所化の機能的意義を解明する.
主な方法:
- hESC と mESC の lncRNA 亜細胞局所化の比較分析
- ESCにおける lncRNA FAST (特に hFAST と mFast) の役割を調査する.
- hFASTを含むタンパク質相互作用とそのWNTシグナル伝達経路への影響を特定する.
- PPIEのようなスプライシングファクターによるmFast処理の規制を検証する.
主要な成果:
- mESCと比較してhESCの細胞質に lncRNA の割合が著しく高い.
- 位置的に保存された lncRNA FAST は,hESC と mESC の間の異なる処理と局所化を示している.
- 細胞質のhFASTはβ-TrCPと相互作用し,β-カテニンの分解を抑制し,hESCの多能性にとって不可欠なWNTシグナリングを活性化します.
- 核を保持したmFast処理は,mESCで高い割合で表現されるSplicing Factor PPIEによって抑制されます.
結論:
- lncRNAの迅速な機能的進化において, lncRNAの処理と細胞下部位化が決定的であり,それでも過小評価されている.
- 差異的な lncRNA 局所化は,ESC 多能性の維持に重要な役割を果たします.
- lncRNAの機能の種特有の調節は,進化の分岐に寄与する.
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