长读数测序揭示了在AAV驱动的CRISPR RNP复合物的CRISPR RNP复合物的AAV驱动电孔后的转基因结合和矢量序列集成
Muhammad W Luqman1,2, Piroon Jenjaroenpun3, Jessica Spathos1
1Dementia Research Centre, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW, Australia.
Frontiers in genome editing
|June 19, 2025
概括
使用基因相关病毒 (AAVs) 来编辑CRISPR基因可以有效地创建动物模型. 然而,可能会发生意外的目标突变和病毒序列整合,需要对生成的突变系进行彻底验证.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 生物工程是生物工程.
背景情况:
- 克里斯普尔基因编辑加速了用于研究的动物模型的创建.
- 腺相关病毒 (AAV) 越来越多地用于提供大型DNA有效载荷,用于生成敲门模型.
- 传统的基因型定型方法可能会错过无意的目标突变 (旁观者突变).
研究的目的:
- 在小鼠模型中,对大型转基因敲入进行AAV使用时,对编辑结果进行彻底分析.
- 为了调查意外的目标突变和病毒序列集成的发生.
- 为生成和验证转基因动物模型提供最佳实践信息.
主要方法:
- 通过使用AAVs来进行大型转基因输送,以Ace2和Foxg1基因为目标,生成敲入小鼠模型.
- 利用牛津纳米孔技术的长读测序,对编辑结果进行全面分析.
- 采用了一种工作流程,包括Cas9丰富和适应性采样,用于详细的突变检测.
主要成果:
- 在AAV介导的敲进模型中确定了无意的目标突变,包括重复事件.
- 检测到病毒序列的整合,这是AAV传递方法的潜在工件.
- 证明了传统的基因型鉴定在检测这些复杂的目标变化的局限性.
结论:
- 通过AAV介导的大型转基因敲门需要深入验证,超出标准的基因型定型.
- 意外突变和病毒序列整合是与这种方法相关的潜在风险.
- 这项研究为在动物模型生成中改进基于AAV的基因编辑技术提供了关键的见解.
相关概念视频
02:53CRISPR 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...
03:21RNA-seq
RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases.
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...