哺乳动物中心细胞的发育和组织特异性作用
Charlotte Meyer-Gerards1,2,3,4,5, Hisham Bazzi1,2,3,5
1Department of Cell Biology of the Skin, Medical Faculty, University of Cologne, Germany.
The FEBS journal
|June 27, 2024
概括
中心体对于细胞分裂和毛至关重要,对小鼠发育至关重要. 中心细胞的损失会引发细胞死亡,导致胚胎停产,突出显示它们在器官形成中的重要作用.
科学领域:
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
- 遗传学 是一个遗传学.
背景情况:
- 中心细胞由中心细胞组成,是动物细胞中主要的微管组织中心.
- 它们在细胞分裂的纤维化和线粒状组织中起着关键作用.
- 中心体功能障碍会影响细胞过程和生物体发育.
研究的目的:
- 审查中心体在小鼠早期发育和器官生成中的关键作用.
- 研究胚胎发育过程中中心体功能丧失的后果,特别是心点缺失的后果.
- 了解不同组织中细胞对中心损失的反应和发育值.
主要方法:
- 关于哺乳动物发育中的中心细胞功能现有文献的综述.
- 在小鼠模型中分析具有中心体和中心点缺陷的表型.
- 检查线粒细胞监测途径和p53依赖的细胞死亡,以应对中心细胞损失.
主要成果:
- 缺少中间体的小鼠胚胎对线粒监测通路高度敏感,导致妊娠中期的胚胎停产.
- 与其他中枢细胞蛋白质的损失相比,中枢细胞核的完全损失会导致更严重和更早的发育缺陷.
- 发育中的组织表现出不同的值和分级的响应中心点损失,不管它们的生殖层起源.
结论:
- 中心细胞对于胚胎发育是不可或缺的,它们的完全缺失会导致严重的后果.
- 线粒细胞监测通路是对中心细胞功能障碍的关键保障,但其在中心细胞缺陷胚胎中的激活会导致发育失败.
- 组织特异性对中心损失的反应强调了控制发育和细胞完整性的复杂调节机制.
相关概念视频
01:13Centrioles and Centrosomes
2.7K
Most animal cells comprise a pair of centrioles together called a centrosome. The cell duplicates its centrosome and contains two centrosomes side-by-side, which begin to move apart during the prophase. As the centrosomes migrate to two different sides of the cell, microtubules start extending from each centrosome toward the other end. The mitotic spindle is composed of the centrosomes and their emerging microtubules.
Near the end of the prophase, also called late prophase or...
Near the end of the prophase, also called late prophase or...
2.7K
02:25Centrosome Duplication
4.0K
The primary microtubule organizing center (MTOC) in animal cells is the centrosome. A centrosome has two cylindrical centrioles at its core. Each centriole consists of nine sets of three microtubules held together by proteins. The centrioles are positioned at right angles to each other and surrounded by a shapeless protein cloud called the pericentriolar matrix, or pericentriolar material (PCM).
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
4.0K
02:30Histone Variants at the Centromere
4.3K
Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3...
4.3K
02:27The Mitotic Spindle
6.5K
The mitotic spindle—or spindle apparatus—is a eukaryotic, cytoskeletal structure made up of long protein fibers called microtubules. Formed during cell division, the spindle separates sister chromatids and moves them to opposite ends of a parental cell, where the now individual chromosomes are distributed to two daughter cell nuclei.
The bipolar configuration of the mitotic spindle facilitates chromosomal segregation, preparing the cell for division. One mechanism that ensures...
The bipolar configuration of the mitotic spindle facilitates chromosomal segregation, preparing the cell for division. One mechanism that ensures...
6.5K
02:50Spindle Assembly
3.6K
Spindle assembly occurs through three, often coexisting, pathways – the centrosome-mediated pathway, the chromatin-mediated pathway, and the microtubule-mediated pathway – collectively contributing to form a robust spindle apparatus.
In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a...
In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a...
3.6K
01:32Assembly of Complex Microtubule Structures
1.8K
Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
1.8K