相关实验视频
Updated: Jun 9, 2025

12:19
Analysis of Cell Cycle Position in Mammalian Cells
Published on: January 21, 2012
60.3K
在非典型的形形瘤中,RRM2抑制通过ATM/Rb/E2F1通路改变细胞周期
Le Hien Giang1, Kuo-Sheng Wu2, Wei-Chung Lee3
1International Ph.D. Program for Translational Science, College of Medical Science and Technology, Taipei Medical University, Taipei 11031, Taiwan; Department of Biology and Genetics, Hai Phong University of Medicine and Pharmacy, Hai Phong 180000, Vietnam.
概括
用COH29向核糖核酸还原酶调节子单元M2 (RRM2) 诱导DNA损伤和细胞循环停止在非典型的形形瘤 (ATRT). 这种RRM2抑制会影响ATM/Rb/E2F1通路,提供一种潜在的新的ATRT治疗.
科学领域:
- 儿科瘤学 儿科瘤学
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 非典型的甲状腺形形瘤 (ATRT) 是一种罕见且具有攻击性的儿科脑癌.
- 用COH29准核糖核酸还原酶调节子单元M2 (RRM2) 通过诱导DNA损伤和亡,在ATRT治疗中显示出希望.
- 了解COH29的作用机制对于其在ATRT中的临床应用至关重要.
研究的目的:
- 阐明在ATRT中COH29的治疗作用背后的分子机制.
- 为了确定ATRT细胞中RRM2抑制调节的关键信号通路.
- 探索针对ATRT治疗的ATM/Rb/E2F1通路的潜力.
主要方法:
- 对ATRT患者样本和用COH29处理的细胞进行分子分析.
- 使用淘汰系统,流细胞计,定量PCR (q-PCR) 和西部斑分析进行验证.
- 对ATM/Rb/E2F1信号通路的分析.
主要成果:
- 升高的E2F1表达与ATRT的预后不佳相关.
- 通过COH29抑制RRM2,引发DNA损伤并激活ATM.
- ATM激活导致Rb酸化减少,促进Rb-E2F1相互作用和抑制E2F1活动,导致细胞循环停止和DNA修复受损.
结论:
- 在ATRT中,ATM/Rb/E2F1通路在RRM2抑制诱导的DNA损伤后的细胞周期停止和细胞亡中起着关键作用.
- 在ATRT中COH29的治疗效益与其对ATM/Rb/E2F1通路的调制有关.
- 针对这种途径为ATRT提供了潜在的治疗策略.
相关概念视频
Negative Regulator Molecules
35.2K
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.
35.2K
Abnormal Proliferation
4.5K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
4.5K
mTOR Signaling and Cancer Progression
3.7K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
3.7K
DNA Damage can Stall the Cell Cycle
9.1K
In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
9.1K
Inhibition of Cdk Activity
4.7K
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...
4.7K
The Retinoblastoma Gene
4.1K
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
4.1K

