遗传编码的紧张异质性雕塑了心脏的轨道运动
Jinxiu Liang1,2,3, Peijun Jiang1,2,3, Shuaifang Yan4
1Department of Cardiology, Center for Genetic Medicine, the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang, China.
Science advances
|March 7, 2025
概括
心肌细胞的命运是由erbb2信号决定的,它驱动细胞分层以形成状细胞. 邻近的细胞然后抑制erbb2以保持紧的层,编排心脏发育.
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
- 细胞信号传输 细胞信号传输
背景情况:
- 发育中的心脏壁包括一个单一的心肌细胞层,细胞分化成状或紧层.
- 确切地说,决定心肌细胞命运和随后的层形成的精确分子机制尚未完全理解.
研究的目的:
- 阐明心肌壁发育期间控制心肌细胞命运决定的分子机制.
- 研究ERBB2信号在心脏轨道和紧层形成中的作用.
主要方法:
- 单细胞RNA测序以分析基因表达.
- 基因编码的生物传感器来跟踪信号通路.
- 在 toto 实时成像中观察心脏发育过程中的细胞动态.
主要成果:
- 在erbb2表达的内在变化与心肌细胞决定形成状细胞的决定相关.
- erbb2信号激活PI3K并招募Arp2/3复合体,促进actomyosin网络的极化和细胞分层.
- 邻近心肌细胞中的痕信号抑制了新形成的轨道状细胞中的erbb2表达,降低了细胞张力,并将它们限制在紧层中.
结论:
- 一个协调的基因和细胞相互作用,涉及erbb2和Notch信号,决定心肌细胞的命运.
- 这种机制对于胚胎发育期间心肌壁的精确模式形成至关重要.
相关概念视频
01:13Structure of Cardiac Muscles
Cardiac muscle, or myocardium, is a specialized type of muscle found exclusively in the heart. Its unique structural and functional characteristics enable the heart to perform its vital role of pumping blood throughout the body continuously and rhythmically. The cardiac muscle cells, or cardiomyocytes, possess an endomysium and perimysium but do not have an epimysium.
Compared to skeletal muscles, cardiac muscle cells are small and mostly have a single nucleus. Additionally, they are usually...
Compared to skeletal muscles, cardiac muscle cells are small and mostly have a single nucleus. Additionally, they are usually...
01:27Specialized Characteristics of Cardiac Muscles
The primary role of cardiac muscles is to propel blood throughout the cardiovascular system. The cardiac muscle cells, or cardiomyocytes, exhibit specialized characteristics that allow them to perform this function.
Cardiac muscle cells are smaller than skeletal muscles, averaging 10–20 mm in diameter and 50–100 mm in length. However, they have large energy demands for continuous contraction and relaxation. This energy is almost exclusively derived from aerobic metabolism of energy reserves in...
Cardiac muscle cells are smaller than skeletal muscles, averaging 10–20 mm in diameter and 50–100 mm in length. However, they have large energy demands for continuous contraction and relaxation. This energy is almost exclusively derived from aerobic metabolism of energy reserves in...
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...