SRSF3はスプライシングと増殖を調節することにより心外膜形成を制御するRNA結合タンパク質
Irina-Elena Lupu1, Susann Bruche1, Anob M Chakrabarti2,3
1Institute of Developmental and Regenerative Medicine, British Heart Foundation Centre of Research Excellence, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX3 7TY, UK.
まとめ
RNA結合タンパク質SRSF3は、胚発生中の心外膜形成に不可欠である。その欠失は心外膜細胞の増殖を停止させ、心臓発生と再生に影響を与える。
科学分野:
- 心血管生物学
- 発生生物学
- 分子生物学
背景:
- 心外膜は心臓発生と再生において重要な役割を果たしている。
- 心外膜形成を制御する主要な分子メカニズムは、依然として完全には理解されていない。
研究 の 目的:
- RNA結合タンパク質SRSF3の心外膜形成と機能における役割を調査すること。
- SRSF3の心外膜発生調節の根底にある分子メカニズムを解明すること。
主な方法:
- 前心膜における標的Srsf3欠失を有するマウスモデルを利用した。
- Srsf3枯渇に対する細胞応答を分析するために、単一細胞RNAシーケンシングを採用した。
- SRSF3-RNA相互作用をマッピングするために、内因性irCLIPを実行した。
主要な成果:
- マウスの前心膜におけるSrsf3欠失は、増殖停止と心外膜形成障害を引き起こした。
- Srsf3枯渇は、心外膜細胞の増殖と心外膜由来細胞(EPDC)の形成を減少させた。
- SRSF3は細胞周期調節因子Ccnd1およびMap4k4に結合し、スプライシング機能と非スプライシング機能の両方に影響を与える。
結論:
- SRSF3は、心外膜増殖の制御と適切な心外膜形成の確保に不可欠である。
- SRSF3は、スプライシング依存的および非依存的メカニズムの両方を介して心臓発生を調節する。
- モザイク組換えは胚の表現型分析を著しく混乱させる可能性があり、SRSF3の調節的役割の重要性を強調している。
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