相关实验视频
Updated: Jun 25, 2026

12:04
Mouse Genome Engineering Using Designer Nucleases
Published on: April 2, 2014
基因沙漠的大基删除会导致活跃的小鼠
Marcelo A Nóbrega1, Yiwen Zhu, Ingrid Plajzer-Frick
1DOE Joint Genome Institute Walnut Creek, California 94598, USA.
Nature
|October 22, 2004
概括
哺乳动物非编码DNA或基因沙漠中的大量删除在小鼠中被容忍. 这表明一些非编码DNA可能是一次性,这挑战了我们对基因组功能的理解.
科学领域:
- 基因组学就是基因组学.
- 进化生物学 进化生物学
- 哺乳动物遗传学 哺乳动物遗传学
背景情况:
- 哺乳动物基因组中庞大的非编码区域 (约98%) 的功能在很大程度上是未知的.
- 了解非编码DNA的作用对于完整了解基因组功能和进化至关重要.
研究的目的:
- 研究哺乳动物中大型非编码DNA区域的功能重要性.
- 为了确定是否可以删除"基因沙漠"的重要部分,而不会对生物体产生不良影响.
主要方法:
- 从小鼠基因组中删除两个大型非编码DNA间隔 (1,511 kb和845 kb).
- 生产和全面分析这些缺失的可活性鼠标同卵性.
- 评估形态,生殖健康,生长,寿命,平衡和基因表达模式.
主要成果:
- 产生了具有大量非编码DNA缺失的活跃小鼠,与野生类型的 littermates没有显著差异.
- 没有观察到形态,繁殖,生长,寿命或一般恒温的重大变化.
- 在被删除区域附近的基因表达分析只显示了微小的差异.
结论:
- 哺乳动物基因沙漠中的大规模删除可以很好地容忍.
- 这些发现支持哺乳动物基因组中"一次性DNA"的概念,其中一些非编码序列可能没有必要的功能.
- 需要进一步的研究来确定被删除的保存非编码序列的潜在功能.
相关概念视频
In-vitro Mutagenesis
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
Mouse Models of Cancer Study
Mice have long served as models for studying human biology and pathology because of their phylogenetic and physiological similarity with humans. They are also easy to maintain and breed in the laboratory, and hence, many inbred strains are now available for research. Studies on mice have contributed immeasurably to our understanding of cancer biology.
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...

