ECM组织,ROCK信号传递和细胞极性之间的相互作用驱动中质形成和肺生长
Xinyuan Liu1,2, Bingying Lin3, Peiyi Li1,2
1State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, P.R. China.
Nature communications
|October 31, 2025
概括
FREM2对于肺部尺寸调节至关重要,因为它能维持半质细胞中的弹性纤维和细胞信号传递. FREM2中的突变导致小鼠和人类的肺部变小,揭示了器官生长控制的关键机制.
科学领域:
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- 器官尺寸调节是一个复杂的过程,尚未完全理解.
- 像FREM2这样的特定基因在器官发育中的作用需要进一步研究.
研究的目的:
- 阐明FREM2在调节肺部大小中的作用.
- 确定FREM2影响肺部发育的分子机制.
主要方法:
- 利用Frem2突变小鼠研究肺部发育.
- 研究了弹性纤维的形成,中质细胞的两极分化以及相关的信号通路 (pMLC,p38,MMP-2,ROCK,Vangl2).
- 检查了FREM2突变患者的肺组织.
主要成果:
- 在Frem2突变小鼠中,弹性纤维形成和中细胞极性受损,导致肺生长抑制.
- p38和MMP活动,以及ROCK和Vangl2信号,都参与FREM2介导的肺大小调节.
- 弗雷姆2缺乏也会影响中细胞的发育和其他器官的大小.
- 患有FREM2突变的患者有较小的肺部.
结论:
- FREM2是肺大小的关键调节者,通过其对中细胞功能和弹性纤维组织的影响.
- 一个积极的反循环,涉及pMLC信号,弹性纤维和细胞极性,决定了肺的大小.
- 中皮在控制器官大小方面发挥着保留作用,这对人类肺部发育有影响.
相关概念视频
Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal
2.6K
Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.
2.6K
Overview of Cell-Matrix Interactions
8.8K
The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
8.8K
Extracellular Matrix
5.1K
Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. This extracellular matrix (ECM) is composed of fibrous proteins like collagen, elastin, and fibronectin in a ground substance consisting of interstitial fluid, cell adhesion proteins, and proteoglycans. The proteoglycans form a gel-like material in the spaces between cells and provide hydration, buffering, binding, and force...
5.1K
The Tumor Microenvironment
7.6K
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
7.6K
The Extracellular Matrix
11.8K
Overview
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.
Composition of the Extracellular Matrix
The extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse...
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.
Composition of the Extracellular Matrix
The extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse...
11.8K
The Extracellular Matrix
88.1K
Overview
88.1K


