在斑马鱼中进行系统增强器映射和功能分析,并优化了CRISPR干扰
Jiulin Chan1,2, Zhichao Wu1,2, Mingli Liu1,2
1Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China.
Nucleic acids research
|December 19, 2025
概括
研究人员优化了斑马鱼中集群定期间隔的短Palindromic重复干扰 (CRISPRi),以研究基因调节. 该系统确定了控制和血液细胞发育的新增增强剂,推进了 cis-regulatory 元素注释.
科学领域:
- 基因组学就是基因组学.
- 发展生物学 发展生物学
- 分子遗传学 分子遗传学
背景情况:
- 非编码的cis调节元件,特别是增强剂,对于基因表达控制至关重要.
- 在体内使用集群定期间隔的短时间Palindromic重复 (CRISPR) 干扰 (CRISPRi) 研究增强器功能在斑马鱼模型中具有挑战性.
研究的目的:
- 优化斑马鱼中的CRISPRi系统,以有效地抑制基因.
- 通过使用优化的CRISPRi系统,对全球蛋白基因的远端增强剂进行功能注释.
- 开发一个集成的平台,用于脊椎动物的cis-regulatory元素注释.
主要方法:
- 通过微调组分度来优化CRISPRi系统,以实现高效的基因淘汰.
- 应用CRISPRi以功能性地表征全球因基因的远端增强剂.
- 利用Hi-C和基因组修饰测试来绘制全基因组的增强剂-促进剂 (EP) 相互作用.
主要成果:
- 确定了以前未报告的增强剂,具有显著的调节强度,影响和血细胞发育.
- 绘制了434个增强剂-促进剂相互作用,揭示了新的调节循环.
- 验证了几个新的EP循环,证明了综合方法的有效性.
结论:
- 优化的CRISPRi系统增强了斑马鱼增强剂的功能研究.
- 这项研究提供了一个强大的平台,整合了计算和实验方法,用于 cis-regulatory 元素注释.
- 这项工作促进了对脊椎动物发育和疾病中的基因调节的理解.
相关概念视频
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...
Homologous Recombination
The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
CRISPR and crRNAs
Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
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...
The Antiviral System of Bacteria and Archaea: CRISPR
CRISPR stands for Clustered Regularly Interspaced Short Palindromic Repeats is a adaptive immune system found in bacteria and archaea that protects against viral infections. This system enables prokaryotic cells to identify, remember, and neutralize foreign genetic elements, primarily bacteriophages, by storing fragments of the invader’s DNA as a genetic memory.The CRISPR immune response begins during an initial infection. Cas (CRISPR-associated) proteins play a central role in this defense.
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...


