通过局部上皮层拓来控制线粒分裂平面的控制
William T Gibson1, James H Veldhuis, Boris Rubinstein
1Program in Biophysics, Harvard University, Cambridge, MA 02138, USA.
Cell
|February 8, 2011
概括
细胞形状显著影响表皮组织中的细胞分裂方向. 这项研究表明,局部细胞拓在动物和植物细胞中决定了分离平面的方向.
科学领域:
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
背景情况:
- 150多年来,已知细胞形状会影响线粒分裂平面的方向.
- 细胞几何和表皮上的分离平面方向之间的复杂关系仍然不太清楚.
- 表皮质中的多边形细胞形状源于复杂的相互作用,包括细胞包装,生长和分裂.
研究的目的:
- 研究单个细胞形状如何影响表皮组织内邻近细胞中线粒分裂平面的方向.
- 为了确定模拟中观察到的细胞拓和分裂平面方向之间的相关性是否在不同的生物体体内真实.
主要方法:
- 利用机械模拟来模拟多边形细胞形状对线粒体邻居方向的影响.
- 对动物表皮和植物表皮进行了体内分析,以验证模拟结果.
- 运用数学分析来阐明控制观察效应的基本原则.
主要成果:
- 证明多边形细胞形状系统地偏向相邻的线粒细胞的长轴方向.
- 在动物和植物上皮质组织中证实了局部细胞拓和裂纹平面方向之间的强烈和一致的相关性.
- 表明基本的包装约束是这种对分离平面方向的拓影响的基础.
结论:
- 局部上皮层拓是分裂平面方向的关键决定因素.
- 由细胞拓学驱动的裂变平面偏差可能是植物和动物多边形细胞板中普遍存在的现象.
- 这一发现为多细胞生物中的细胞分裂调节提供了新的视角.
相关概念视频
Determining the Plane of Cell Division
Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is essential for determining the size of the two daughter cells. The cell division plane is perpendicular to the plane of chromosome segregation, but different types of organisms have different cell division mechanisms to suit their morphology and function.
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division starting...
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division starting...
Determining the Plane of Cell Division
Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is essential for determining the size of the two daughter cells. The cell division plane is perpendicular to the plane of chromosome segregation, but different types of organisms have different cell division mechanisms to suit their morphology and function.
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division starting...
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division starting...
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Many proteins function together to control the spindle assembly checkpoint. Mutations affecting these proteins may allow cells to proceed into anaphase prematurely, resulting in the...
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Separation of Sister Chromatids
At the transition from prophase to metaphase, there is a reduction in cohesion along the chromosomal arms, resulting in the resolution of sister chromatids. However, residual cohesin connections remain to hold the sister chromatids together until the transition from metaphase to anaphase. The residual connection prevents any premature separation of sister chromatids, blocking the risks of aneuploidy within the daughter cells.
At the onset of anaphase, separase, a proteolytic enzyme, is...
At the onset of anaphase, separase, a proteolytic enzyme, is...
Cell Motility through Blebbing
Blebs are a type of membrane protrusion formed by the internal hydrostatic pressure of the cytoplasm. Blebs are observed in several cell types, including fibroblasts, immune cells, and single-celled organisms like the amoeba. The primary function of blebs is cell locomotion and apoptosis, but they are also found during necrosis and cell division. The life cycle of a bleb comprises an initiation phase followed by the expansion and retraction phases.
Blebbing Through the Matrix
In multicellular...
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Assembly of Complex Microtubule Structures
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.


