综合性单细胞心脏生成分析确定先天性心脏病的发育轨迹和非编码突变
Mohamed Ameen1, Laksshman Sundaram2, Mengcheng Shen3
1Department of Cancer Biology, Stanford University, Stanford, CA, USA; Illumina Artificial Intelligence Laboratory, Illumina Inc, Foster City, CA, USA.
Cell
|December 23, 2022
概括
这项研究使用单细胞表观学绘制了心脏细胞的发育图,揭示了转录因子的关键作用,并确定了与先天性心脏病 (CHD) 相关的遗传变异. 这些发现有助于了解心脏发育和心脏病的起源.
科学领域:
- 心血管生物学
- 表观遗传学
- 发育生物学
背景情况:
- 了解心脏细胞发育需要详细的表观基因和转录映射.
- 人类胎儿心脏的发育涉及复杂的分化途径和调节网络.
研究的目的:
- 定义人类心脏发育的多细胞表观和转录格局.
- 确定驱动心脏细胞分化的调控因素和转录因子 (TF) 活动.
- 通过分析调控变异来研究先天性心脏病 (CHD) 的遗传基础.
主要方法:
- 从人类胎儿心脏组织生成单细胞色素可访问性地图.
- 使用深度学习模型从可访问性配置文件中解释TF动机词典.
- 在体内与诱导多能干细胞 (iPSC) 衍生的心脏细胞调节场景进行对比.
- 对心血管疾病患者和对照患者的新突变进行分析.
主要成果:
- 确定了八种主要的心脏细胞分化轨迹,具有动态TF活动特征.
- 通过对比调节场景优化心上细胞的体外分化.
- 解密了心脏发育的细胞类型解决的 cis-regulatory 序列决定因素.
- 在心血管疾病患者的动脉内皮中发现了影响色素可及性的突变.
结论:
- 这项工作提供了心脏发育调节序列的全面地图.
- 细胞类型特异性调节元件的破坏与先天性心脏病有关.
- 这些发现为优化基于干细胞的心脏治疗和了解心脏病的病因提供了见解.
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