RNA m6 の読者 YTHDC1 はレトロトランポゾンを静止し,ES 細胞のアイデンティティを守ります
Jiadong Liu1,2,3, Mingwei Gao1,2,3, Jiangping He4
1CAS Key Laboratory of Regenerative Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China.
Nature
|March 4, 2021
まとめ
RNA リーダ YTHDC1 は,レトロトランスポゾンを抑制することでマウスの胚性幹細胞を維持する. 2Cのような状態への再プログラミングを 引き起こします
科学分野:
- エピジェネティクスと遺伝子調節
- 哺乳類の胚の発達
- RNA 生物学
背景:
- N6-メチラデノシン (m6A) は,生物学的プロセスにおける重要なRNA改変である.
- 哺乳類の早期発達におけるm6Aの役割は十分に理解されていません.
- YTHDC1は,幹細胞の維持に潜在的な役割を持つm6Aリーダータンパク質です.
研究 の 目的:
- マウスの胚性幹細胞 (ES) でのYTHDC1の機能を調査する.
- YTHDC1が細胞を再プログラムするメカニズムを解明する.
- クロマチンの改変とレトロトランポゾン抑制における m6A RNA の役割を理解する.
主な方法:
- マウスのES細胞におけるYTHDC1の削除
- レトロトランスポゾン活性と表遺伝子変異 (H3K9me3) の分析
- YTHDC1,m6A RNAs,SETDB1,およびDuxの相互作用を調査する.
主要な成果:
- YTHDC1の削除は,2Cのような状態に細胞の再プログラムにつながります.
- YTHDC1はレトロトランスポゾントランスクリプトを結合し,その枯渇によりこれらの元素が再活性化されます.
- YTHDC1の枯渇は,SETDB1媒介のH3K9me3を減少させ,表遺伝子異常を示しています.
- YTHDC1とm6ARNAはSETDB1の上流で作用し,レトロトランポゾンとDuxを抑制する.
結論:
- YTHDC1は,マウスのES細胞をm6Aに依存した状態に保つために不可欠です.
- YTHDC1とm6ARNAは,レトロトランポゾンと2C類似プログラムを抑制する上で重要な役割を果たします.
- この研究は,初期発達の間における表遺伝子制御において,m6A RNA,YTHDC1,およびSETDB1を含む新しい経路を明らかにした.
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