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相关概念视频

Positive Regulator Molecules02:39

Positive Regulator Molecules

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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.
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To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.
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Inhibition of Cdk Activity02:34

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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...
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Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
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M cyclin...
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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.
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The cell cycle is an organized set of events that leads the cell to divide into two daughter cells, each containing chromosomes identical to the parent cell. It is the cell cycle that leads to the formation of an entire organism from a single-cell zygote. Besides, cell division also functions in the renewal or repair of tissues in adult multicellular eukaryotes. For example, in the bone marrow, the stem cells divide to form new blood cells. Although essential for several functions, cell...
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CDH1 编排合成代谢事件以促进细胞周期启动.

Yun-Zi Mao1, Jiao-Jiao Zhang1,2, Meng-Qi You1

  • 1The Obstetrics and Gynecology Hospital of Fudan University, Shanghai Key Lab of Reproduction and Development, Shanghai Key Lab of Female Reproductive Endocrine Related Diseases, Shanghai Key Laboratory of Metabolic Remodeling and Health, State Key Laboratory of Genetics and Development of Complex Phenotypes, and Institutes of Biomedical Sciences, Fudan Unviersity, Shanghai, 200433, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|September 29, 2025
PubMed
概括

细胞循环调节器CDH1通过控制代谢,激活HIF1α进行代谢和AARS2以节约资源来协调细胞生长,从而促进细胞增殖和癌症进展.

关键词:
CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1 CDH1在R5P中,R5P是R5P.这种类型的 anabolism 是 anabolic 的.细胞循环中的细胞循环.

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科学领域:

  • 细胞生物学 细胞生物学
  • 分子生物学分子生物学
  • 生物化学 生物化学

背景情况:

  • 细胞增殖需要合成代谢过程,但合成代谢与细胞循环的整合仍然不清楚.
  • 了解细胞是如何启动增殖的,需要研究代谢途径与细胞周期进展的协调.

研究的目的:

  • 阐明G1阶段调节器CDH1在协调细胞周期启动的合成代谢事件中的作用.
  • 确定CDH1在细胞周期进展过程中影响新陈代谢和合成物水平的分子机制.

主要方法:

  • 研究了由CDH1.1降解希佩尔-林道 (VHL) 的降解.
  • 分析了通过CDH1.1激活缺氧诱导因子1α (HIF1α) 和阿兰tRNA合成酶 (AARS2) 的活性.
  • 研究了核糖-5-酸盐 (R5P) 与转基因酶样-1 (TKTL1) 的相互作用及其在CDH1调节中的作用.

主要成果:

  • CDH1降解VHL,激活HIF1α以促进葡萄糖代谢和血管生成.
  • CDH1激活AARS2,导致pyruvate脱酶E1亚单元α1 (PDHA1) 的失活,并保护了类合成物质.
  • 由于CDH1活动而积累的R5P结合TKTL1,将CDH1桥接到CDK2和SCFβ-TRCP进行CDH1酸化和降解,促进细胞循环启动.
  • 低R5P和高CDH1表达与癌细胞增殖相关.
  • 人工R5P (R5S) 通过启动细胞周期而诱导癌细胞的亡.

结论:

  • CDH1充当了细胞代谢的中心协调者,以确保细胞循环的启动.
  • 已识别的CDH1-VHL-HIF1α/AARS2-R5P/TKTL1电路对细胞增殖至关重要,并与Warburg效应和血管生成等癌症特征有关.
  • 针对这种电路为癌症治疗提供了潜在的治疗策略.