使用高效的TALEN系统进行体内基因组编辑
Victoria M Bedell1, Ying Wang, Jarryd M Campbell
1Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota 55905, USA.
Nature
|September 25, 2012
概括
增强的人工转录激活器样效应核酶 (TALEN) 能够在斑马鱼中进行精确的基因组编辑. 这一突破在这个重要的脊椎动物模型中促进了向基因修饰和功能基因组研究.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 斑马鱼模型系统系统
背景情况:
- 斑马鱼 (Danio rerio) 对于研究脊椎动物生物学和人类疾病至关重要.
- 以前针对性基因组修改的局限性阻碍了斑马鱼的研究.
- 人工转录激活器样效应核酶 (TALEN) 提供了基因组编辑的潜力.
研究的目的:
- 评估针对性斑马鱼基因组编辑的增强TALEN技术.
- 为了证明TALENs在诱导特定位置的DNA断裂方面的效率.
- 通过斑马鱼的同质导向修复来展示精确的序列修改.
主要方法:
- 使用了改进的GoldyTALEN脚手架和斑马鱼输送系统.
- 用TALENs诱导体和生殖系组织中的DNA断裂.
- 用单链DNA寡核酸来进行同质导向的修复.
主要成果:
- 实现了高效率,特定于位点的DNA与TALEN断裂,在某些位点接近100%.
- 在体组织中证明了双转化,模仿了morpholino knockdown表型.
- 成功引入定制序列 (EcoRV网站,mloxP) 并实现生殖系传播.
结论:
- 增强的TALEN为有针对性的斑马鱼基因组编辑提供了强大的工具.
- 这种方法可以实现精确的序列修改和功能性基因组应用.
- 这种方法有助于建模遗传变异,并在斑马鱼中产生向条件等位基因.
相关概念视频
CRISPR/Cas9 Genome Editing
The CRISPR-Cas system serves as a bacterial defense mechanism against invading genetic elements such as viruses and plasmids, forming the foundation for its adaptation as a powerful genome-editing tool. Originally discovered in prokaryotes, this system has been repurposed to revolutionize genetic engineering across a wide range of organisms, including plants, animals, and humans. The core component, Cas9, is an endonuclease derived from Streptococcus pyogenes, capable of introducing...
CRISPR
Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced Short...
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.


