相关实验视频
Updated: Feb 15, 2026

14:49
Associated Chromosome Trap for Identifying Long-range DNA Interactions
Published on: April 23, 2011
15.0K
染色体不稳定通过细胞核DNA反应驱动转移
Samuel F Bakhoum1,2, Bryan Ngo2, Ashley M Laughney3
1Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA.
Nature
|January 18, 2018
概括
染色体的不稳定性通过触发DNA传感途径驱动癌症转移. 抑制这些错误会延缓瘤的扩散,
科学领域:
- 癌症学
- 细胞生物学
- 遗传学
背景情况:
- 染色体不稳定 (CIN) 是癌症的一个常见特征,与瘤进化有关.
- 在癌症转移中CIN的具体作用在很大程度上尚不清楚.
- 分离过程中的染色体分离错误是CIN的主要原因.
研究的目的:
- 研究染色体不稳定在促进癌症转移中的作用.
- 阐明CIN影响瘤扩散的分子机制.
- 确定针对CIN是否可以阻碍转移性进展.
主要方法:
- 使用不同程度染色体不稳定的瘤模型.
- 评估了基因抑制对转移的影响.
- 研究了cGAS-STING通路的激活和NF-κB信号的响应细胞核DNA.
- 在体内分析细胞侵袭和转移.
主要成果:
- 染色体不稳定通过瘤细胞对细胞核DNA的自主反应促进转移.
- 染色体分离的错误导致微核的形成,释放DNA到细胞质中.
- 在CIN驱动的转移中,cGAS-STING通路和NF-κB信号的激活至关重要.
- 抑制CIN可显著延迟转移,即使是在形模型中.
- 持续的染色体分离错误以STING依赖的方式增强细胞入侵和转移.
结论:
- 染色体不稳定是癌症转移的一个关键因素.
- 染色体不稳定的细胞通过cGAS-STING通路和随后的先天免疫激活进行扩散.
- 针对染色体不稳定性或STING通路是一个潜在的治疗策略来抑制癌症的扩散.
相关概念视频
Chromosome Structure
26.7K
A functional eukaryotic chromosome must contain three elements: a centromere, telomeres, and numerous origins of replication.
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
26.7K
Lampbrush Chromosomes
8.7K
In 1882, Flemming observed lampbrush chromosomes (LBC) in salamander eggs. Later in 1892, Rückert observed LBCs in shark egg cells and coined the term "lampbrush chromosomes" because they looked like brushes used to clean kerosene lamps.
LBCs are made up of two pairs of conjugating homologous chromatids. Each chromatid consists of alternatively positioned regions of condensed-inactive chromatin and loosely placed-active side loops, which can be contracted and extended. The loops...
LBCs are made up of two pairs of conjugating homologous chromatids. Each chromatid consists of alternatively positioned regions of condensed-inactive chromatin and loosely placed-active side loops, which can be contracted and extended. The loops...
8.7K
Polytene Chromosomes
11.1K
Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also...
11.1K
Chromosome Replication
10.8K
Before a cell can divide, it must accurately replicate all of its chromosomes, including the DNA and its associated histone and non-histone proteins. This process begins at numerous origins of replication during the S phase of the cell cycle in each of a cell’s chromosomes simultaneously. Certain nucleotides can act as origins of replication, but these sequences are not well defined - especially in complex, multi-cellular, eukaryotic species. The length of DNA that spans an origin...
10.8K
Microtubule Instability
6.3K
Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated...
6.3K
Chromosomal Theory of Inheritance
60.5K
In 1866, Gregor Mendel published the results of his pea plant breeding experiments, providing evidence for predictable patterns in the inheritance of physical characteristics. The significance of his findings was not immediately recognized. In fact, the existence of genes was unknown at the time. Mendel referred to hereditary units as “factors.”
60.5K

