在人类心脏膜重塑过程中,APOE-NOTCH轴控制着弹性生成
Ziyi Liu1,2,3, Yu Liu4,5, Zhiyun Yu1,2,3
1Perinatal Institute, Division of Pulmonary Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
Nature cardiovascular research
|August 28, 2024
概括
研究人员发现了一种新的细胞类型,弹性体-VICs,对于心脏膜重塑至关重要. 这些细胞由APOE和NOTCH信号调节,对于维持门结构和功能至关重要.
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
- 细胞生物学 细胞生物学
背景情况:
- 心脏门改造涉及复杂的细胞外矩阵组织和叶片延长.
- 膜间歇细胞 (VIC) 和膜内皮细胞 (VEC) 在这个过程中起着关键作用.
研究的目的:
- 识别人类胎儿心脏膜中新型细胞亚型和调节弹性生成的分子机制.
- 调查阿波利波蛋白E (APOE) 和NOTCH信号在门重塑和肺狭窄症 (PS) 中的作用.
主要方法:
- 人类胎儿门的单细胞RNA测序.
- 在胎儿VIC中APOE敲击实验.
- 细胞与细胞相互作用分析和途径分析.
- 在肺狭窄 (PS) 门中基因表达的分析.
主要成果:
- 确定了一种新的弹性蛋白产生VIC亚型 (APOE+,弹性蛋白-VICs),位于VEC感应流动下方.
- APOE敲击损害了弹性生成;PS显示了弹性质碎片化和减少APOE表达.
- 由VEC衍生的JAG1通过NOTCH2激活了弹性素-VICs中的弹性质生成,这是PS中破坏的途径.
- APOE通过ERK通路调节JAG1诱导的NOTCH激活和弹性生成.
结论:
- 在人类门改造中,APOE和NOTCH信号是弹性生成的关键调节者.
- 破坏JAG1-NOTCH2通路和APOE功能有助于肺狭窄的膜缺陷.
- 弹-VICs代表了维持心脏门完整性的关键细胞群体.
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