转录因子EBF1非细胞自主调节心脏生长和分化
Eugene E Kim1, Akshay Shekhar1, Jayalakshmi Ramachandran1
1Leon H. Charney Division of Cardiology, NYU Grossman School of Medicine, New York, NY 10016, USA.
Development (Cambridge, England)
|October 3, 2023
概括
非肌细胞中的转录因子Ebf1通过调节心肌细胞生长和MYC积累来控制心脏发育. Ebf1 缺乏导致心脏异常,揭示了一种新的非细胞自主通路.
科学领域:
- 心血管生物学 心血管生物学
- 发展生物学 发展生物学
- 分子遗传学 分子遗传学
背景情况:
- 心脏非肌细胞和心肌细胞之间的相互作用对心脏发育至关重要.
- 转录因子在调节心脏生长和分化方面发挥着关键作用.
研究的目的:
- 调查转录因子Ebf1在心脏发育过程中的心脏非肌细胞中的作用.
- 阐明EBF1调节心脏生长和分化的分子机制.
主要方法:
- 产生了EBF1缺乏的小鼠模型来研究心脏发育.
- 利用转录基因分析 (RNA-Seq) 和ATAC-Seq来分析基因表达和染色质可访问性.
- 与心肌细胞和心脏非肌细胞进行共同培养实验.
- 研究了胚胎心脏培养中的BMP信号通路.
主要成果:
- 非肌细胞的Ebf1缺乏导致心肌细胞增多,心肌细胞大小减少和导电系统缺陷.
- 缺乏 Ebf1 的非肌细胞表现出 Polycomb 镇压复合体 2 位的失调,并改变了染色体的可访问性.
- 由于EBF1缺乏,心肌细胞中MYC的丰度增加,这可以由EBF1缺乏的非肌细胞诱导.
- BMP信号诱导EBF1的表达,并控制EBF1目标基因程序.
结论:
- Ebf1是心脏非肌细胞中关键的转录因子,调节心脏发育.
- Ebf1通过非细胞自主途径控制心肌细胞生长和分化,部分通过MYC调节.
- 这项研究揭示了一种涉及心脏发育中的Ebf1和BMP的新信号通路.
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