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相关概念视频

The DNA Replication Fork01:02

The DNA Replication Fork

40.3K
An organism’s genome needs to be duplicated in an efficient and error-free manner for its growth and survival. The replication fork is a Y-shaped active region where two strands of DNA are separated and replicated continuously. The coupling of DNA unzipping and complementary strand synthesis is a characteristic feature of a replication fork.   Organisms with small circular DNA, such as E. coli, often have a single origin of replication; therefore, they have only two replication...
40.3K
Replicative Cell Senescence02:15

Replicative Cell Senescence

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Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds...
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DNA Damage can Stall the Cell Cycle02:36

DNA Damage can Stall the Cell Cycle

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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...
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DNA Damage Can Stall the Cell Cycle02:36

DNA Damage Can Stall the Cell Cycle

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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...
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相关实验视频

Updated: Jan 10, 2026

Quantifying Replication Stress in Ovarian Cancer Cells Using Single-Stranded DNA Immunofluorescence
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Quantifying Replication Stress in Ovarian Cancer Cells Using Single-Stranded DNA Immunofluorescence

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在癌症中量化复制应激,而不会导致扩散的混.

Philipp Jungk1, Maik Kschischo1

  • 1Institute for Computer Science, University of Koblenz, Koblenz, Rhineland-Palatinate, Germany.

Cell stress
|November 24, 2025
PubMed
概括

我们开发了一种新的基因表达特征 (TRSS),以准确地测量复制应激 (RS),独立于细胞增殖. 这种签名揭示了RS和DNA修复途径之间的联系,特别是非同类末端结合 (NHEJ).

科学领域:

  • 基因组不稳定性和癌症生物学
  • DNA复制和修复机制的复制和修复机制.

背景情况:

  • 复制压力 (RS) 驱动基因组不稳定性和癌症,但其与增殖的联系是复杂的.
  • 目前的RS签名因癌基因活性而偏差,高估了与增殖相关的变化.
  • 需要一个独立于增殖的测量方法来准确地评估RS在不同的细胞环境中.

研究的目的:

  • 开发和验证一种新的基因表达特征,以稳定量化复制应激 (RS).
  • 将真正的RS转录特征从混细胞周期和增殖信号中分离出来.
  • 在患者数据中调查RS和DNA修复途径之间的关系.

主要方法:

  • 开发和验证一种新的基因表达特征,即瘤发生性RS特征 (TRSS).
  • TRSS旨在预测RS,而不依赖于癌基因活性和扩散状态.
  • 对实验和临床样品的TRSS应用,包括患者数据分析.

主要成果:

  • 开发的TRSS准确地在各种细胞环境中测量RS,而不依赖于增殖偏差.
  • 使用TRSS分析患者数据显示,RS升高与非同类末端结合 (NHEJ) DNA修复途径之间存在关联.
  • 升高的RS与不匹配修复基因MSH2和MSH6的表达相关,这表明潜在的转向NHEJ修复.
关键词:
细胞的增殖细胞的增殖.染色体的不稳定性基因表达签名 基因表达签名不匹配的维修 维修不匹配的维修不同类的末端连接.复制压力是复制的压力.

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Genome-wide Determination of Mammalian Replication Timing by DNA Content Measurement

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Last Updated: Jan 10, 2026

Quantifying Replication Stress in Ovarian Cancer Cells Using Single-Stranded DNA Immunofluorescence
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Quantifying Replication Stress in Ovarian Cancer Cells Using Single-Stranded DNA Immunofluorescence

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结论:

  • TRSS提供了一种精细的,不依赖于扩散的方法来量化复制压力.
  • 这项研究突出了复制应激和非同源端连接DNA修复途径之间的新联系.
  • 研究结果表明,RS可能会影响DNA修复途径的选择,影响癌症中的基因组稳定性.