通过对抗PCNA环林的反感性寡氧核化物抑制细胞增殖
D Jaskulski1, J K deRiel, W E Mercer
1Department of Pathology, Temple University Medical School, Philadelphia, PA 19140.
概括
增殖细胞核抗原 (PCNA) 对于DNA合成和细胞分裂至关重要. 使用反感性寡度氧核酸抑制PCNA,会阻止细胞中的DNA合成和细胞分裂.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 增殖细胞核抗原 (PCNA) 是一种核蛋白.
- PCNA作为DNA聚合酶delta的辅因子起作用.
研究的目的:
- 研究PCNA在细胞DNA合成中的作用.
- 为了确定PCNA在细胞周期进展中的重要性.
主要方法:
- 利用反感性寡氧核酸来抑制指数增长的Balb/c3T3细胞中的PCNA.
- 作为对照剂,给出了一种感觉的寡度氧核酸.
主要成果:
- 反意义PCNA寡氧核酸完全抑制了DNA合成.
- 线粒分裂也被反感PCNA oligodeoxynucleotides完全抑制.
- 感觉氧核酸没有显示任何抑制作用.
结论:
- PCNA在细胞DNA合成中起着至关重要的作用.
- PCNA对于细胞循环的进展至关重要.
相关概念视频
Negative 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.
Experimental RNAi
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
Positive 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.
Inhibition 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...
Anaphase Promoting Complex
The stepwise destruction of specific proteins is necessary for the progression and completion of the cell cycle. Such proteins are ubiquitinated by ubiquitin ligases and then subsequently destroyed by the proteasome. The SCF (Skp1/Cullin/F-box) and the anaphase-promoting complex (APC) are two important ubiquitin ligases involved in cell cycle progression. While SCF is active throughout the cell cycle, APC gets activated during metaphase to anaphase transition. Cdc20 or Cdh1 binds to APC and...
Inhibition 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...


