人类生物学和疾病中的DNA损伤反应
Stephen P Jackson1, Jiri Bartek
1The Gurdon Institute and Department of Biochemistry, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK. s.jackson@gurdon.cam.ac.uk
Nature
|October 23, 2009
概括
生命形式必须保护它们的DNA免受损伤,以确保遗传物质的传递. 进化DNA修复机制对于预防疾病和改善健康结果至关重要.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 细胞生物学 细胞生物学
背景情况:
- 所有生命形式都优先将完整的遗传物质传递给后代.
- DNA 不断受到内部和外部破坏性物质的攻击.
- 细胞机制已经进化到检测,信号,并修复DNA损伤.
研究的目的:
- 探索DNA损伤反应系统的生物学意义.
- 突出DNA修复在预防人类疾病中的作用.
- 讨论了解疾病管理的DNA损伤反应的潜力.
主要方法:
- 审查有关DNA损伤和修复途径的现有文献.
- 对DNA损伤反应对细胞事件的影响分析.
- 探索DNA修复与人类疾病预防之间的联系.
主要成果:
- 对于保持基因组完整性来说,DNA损伤反应系统是必不可少的.
- 这些反应在预防广泛的人类疾病方面发挥着至关重要的作用.
- 了解这些途径为疾病治疗开辟了新的治疗途径.
结论:
- DNA 修复机制对于生存和繁殖至关重要.
- 破坏DNA损伤反应的干扰与各种病理有关.
- 对DNA损伤反应的进一步研究为医疗干预提供了有希望的策略.
相关概念视频
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Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
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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...


