kindlins调节整合素和生长因子依赖的尿道芽形成
Shensen Li1, Fabian Bock1,2,3, Olga Viquez1
1Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA.
Development (Cambridge, England)
|January 26, 2026
概括
kindlins对脏发育至关重要,它调解尿道芽形成和分支的必要生长因子信号. 如果没有kindlins,脏的发育就会完全失败.
科学领域:
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 收集系统的发育依赖于尿道 (UB) 的分支.
- 这个过程涉及细胞外矩阵与β1-整合素受体的相互作用.
- 整合素结合亲和力是由kindlins调节的,kindlins与β子单元尾巴相互作用.
研究的目的:
- 研究kindlins在调节发育过程中的β1-整合素功能中的作用.
- 阐明kindlin介导的整合蛋白结合对UB分支和收集管道 (CD) 形成的具体贡献.
主要方法:
- 在UB中产生具有突变β1-整合素缺乏kindlin结合点的小鼠.
- 对这些小鼠的发育和CD细胞功能的分析.
- 产生和分析kindlin-knockout小鼠和CD细胞.
主要成果:
- 患有kindlin结合缺陷β1-整合素的小鼠表现出骨髓缺血和中度分支缺陷.
- 突变的CD细胞表现出受损的管体生成,扩散和粘附,但保留了生长因子信号.
- 在Kindlin淘汰赛中,小鼠出现了,这表明UB芽完全失败.
- Kindlin-knockout CD细胞未能扩散,粘附或对生长因子做出反应,即使有联结的整体素.
结论:
- Kindlins 调节整合素功能和关键生长因子信号通路.
- kindlins对于初始尿管芽的形成和随后的脏发育至关重要.
- 在脏发育中,kindlin-binding整体与kindlin蛋白本身的不同作用.
相关概念视频
01:10Integrins
5.3K
Animal and protozoan cells do not have cell walls to help maintain shape and provide structural stability. Instead, these eukaryotic cells secrete a sticky mass of carbohydrates and proteins into the spaces between adjacent cells. This network of proteins and molecules is called an extracellular matrix or ECM.
Some ECM proteins assemble into a basement membrane to which the remaining components adhere. Proteoglycans typically form the bulk of the ECM while fibrous proteins, like collagen,...
Some ECM proteins assemble into a basement membrane to which the remaining components adhere. Proteoglycans typically form the bulk of the ECM while fibrous proteins, like collagen,...
5.3K
01:28Role of Hematopoietic Growth Factors
3.4K
Hematopoietic growth factors are molecules that regulate the differentiation rate of hematopoietic stem cells (HSCs). Erythropoietin (EPO), primarily produced by the kidneys, plays a crucial role in erythrocyte production. When oxygen levels in the blood are low, EPO is released into the bloodstream, reaching the bone marrow, where it stimulates HSCs to differentiate and mature into erythrocytes, which are vital for oxygen transport.
Thrombopoietin (TPO), mainly released by the liver,...
Thrombopoietin (TPO), mainly released by the liver,...
3.4K
01:29Factors Influencing Microbial Growth: pH
1.1K
Microorganisms are classified as acidophiles, neutrophiles, or alkaliphiles based on their pH growth preferences, reflecting their adaptations to specific environments. Maintaining a stable intracellular pH is critical for macromolecular stability and enzymatic activity, which can be challenged by external pH variations.Neutrophiles, such as Escherichia coli, grow optimally between pH 5.5 and 8.0. These microorganisms inhabit neutral or slightly acidic environments and employ mechanisms like...
1.1K
01:15Activation of Integrins
5.0K
Integrins bind ligands and transmit information from outside the cell to inside or vice-versa through an "outside-in signaling" or "inside-out signaling."
In "outside-in signaling," external factors in the extracellular space bind to exposed ligand binding sites on integrins. This causes the inactive protein to undergo a conformational change to become active. Integrins are often clustered on the cell membrane. Repetitive and regularly spaced ligand binding...
In "outside-in signaling," external factors in the extracellular space bind to exposed ligand binding sites on integrins. This causes the inactive protein to undergo a conformational change to become active. Integrins are often clustered on the cell membrane. Repetitive and regularly spaced ligand binding...
5.0K
01:27Factors Influencing Microbial Growth: Temperature
1.2K
Microorganisms display remarkable adaptations, enabling them to thrive in diverse ecological niches across a wide range of temperatures. Temperature profoundly influences microbial growth by affecting enzymatic activity, membrane fluidity, and other cellular processes.Each microorganism operates within a specific temperature range defined by three cardinal points: minimum, optimum, and maximum. Below the minimum temperature, membranes lose fluidity, halting transport processes. Above the...
1.2K
01:28Factors Influencing Microbial Growth: Osmolarity
787
Osmolarity is the measure of solute concentration in a solution. It plays a critical role in determining water availability for organisms. Water moves across semipermeable membranes through osmosis, flowing from regions of lower solute concentration (more dilute) to regions of higher solute concentration (more concentrated).In high-solute environments, microbial cells lose water, leading to dehydration and inhibited growth. The extent to which water is available to microbes in such environments...
787