相关实验视频
Updated: Aug 11, 2026
12:19
Analysis of Cell Cycle Position in Mammalian Cells
Published on: January 21, 2012
哺乳动物纤维细胞中G1的循环素依赖调节
1Department of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98104.
Science (New York, N.Y.)
|March 26, 1993
概括
哺乳动物细胞中循环E过度表达通过缩短G1阶段持续时间来加速细胞周期进展. 这表明环林水平是细胞增殖的关键调节者,对生理信号作出反应.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 细胞增殖承诺发生在G1阶段.
- 发芽酵母的承诺涉及CDC28激酶和环林结合.
- 在更高的真核生物中,G1进展需要相关的激酶.
研究的目的:
- 调查环林在控制哺乳动物细胞G1进展中的作用.
- 为了确定环林水平是否限制了G1进展的速度.
主要方法:
- 纤维细胞结构过度表达人体环素E.
- 对细胞周期持续时间,细胞大小和G1/S过渡的血清需求的分析.
主要成果:
- 构成性环林E过度表达缩短了G1持续时间.
- 过度表达导致细胞大小减少.
- 对于G1到S阶段过渡的血清需求减少了.
结论:
- 环素水平是哺乳动物细胞G1进展的速度限制.
- 环素合成是控制细胞增殖的生理信号的潜在目标.
相关概念视频
01:45Positive Regulator Molecules
To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.
01:23Negative Regulator Molecules
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
02:39Positive Regulator Molecules
Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.
02:34Inhibition of Cdk Activity
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
02:34Inhibition of CDK Activity
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
01:28The Cell Cycle Control System
The cell cycle regulation directs how a cell proceeds from one phase to the next and begins mitosis. The cell cycle control system includes intracellular regulatory molecules and external triggers. They provide "stop" or "advance" signals and operate at specific cell cycle stages termed checkpoints to ensure that a particular process is completed before the cell advances to the next phase.
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...