在Drosophila翅膀中的生长和细胞分裂的协调
T P Neufeld1, A F de la Cruz, L A Johnston
1Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, USA.
Cell
|July 10, 1998
概括
改变Drosophila翅膀的细胞分裂速率并没有影响组织生长. 相反,细胞分裂的变化被细胞大小的变化所补偿,这表明细胞周期控制与生长是分开的.
科学领域:
- 发育生物学是发展生物学.
- 细胞周期调节细胞周期调节
- 德洛索菲拉 (Drosophila melanogaster) 的研究研究
背景情况:
- 在大多数组织中,细胞分裂和生长通常是协调的.
- 了解将细胞周期控制与组织生长联系在一起的机制至关重要.
研究的目的:
- 为了研究细胞分裂率和多虫翅膀组织生长之间的关系.
- 为了确定操纵细胞增殖是否会影响整体组织大小.
主要方法:
- 在使用基因操纵的Drosophila翅膀克隆和隔间中改变了细胞分裂率.
- 测量了改变的增殖对细胞数量,细胞大小和整体组织生长的影响.
主要成果:
- 过度生产dE2F通过增加循环E和弦表达来加速细胞增殖.
- 丧失dE2F或增加RBF水平减缓了细胞增殖.
- 细胞分裂速率的变化 (4到5倍) 对组织大小的影响很小,但细胞大小显著改变.
结论:
- dE2F和RBF主要调节细胞周期控制,而不是组织生长.
- 单独加速细胞循环不足以刺激组织生长.
- 可以调节dE2F活动以协调细胞分裂与生长.
相关概念视频
Cells Coordinate Growth and Proliferation
Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
The Contractile Ring
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle.
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
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...
The Phragmoplast
Cell division is essential for organismal growth and development. In animal cells, the central spindle and its associated proteins form the midbody, a structure that has an essential role in cytokinesis. In plants, the central spindle, along with the microtubules, actin, and other cell components, matures into the phragmoplast, which is necessary for cytokinesis. Unlike the stationary midbody, the phragmoplast expands centrifugally, eventually leading to the formation of the new cell wall.
The...
The...
Cells Coordinate Growth and Proliferation
Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
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...


