超越剪切:长读测序揭示了复杂的基因组和转录组变化在AAV-CRISPR治疗杜氏肌肉发育不良的治疗
Mary S Jia1, Made Harumi Padmaswari1,2, Landon A Burcham1
1University of Arkansas, Biomedical Engineering.
bioRxiv : the preprint server for biology
|August 6, 2025
概括
基因相关病毒CRISPR基因编辑对杜氏肌肉发育不良有希望,但意外的大插入和反转很常见. 新的长读测序方法提高了这些编辑结果的检测,以实现更安全的临床翻译.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 生物信息学是一种生物信息学.
背景情况:
- 亚第诺相关病毒 (AAV) 介导的CRISPR-Cas9基因编辑是杜申肌肉发育不良 (DMD) 等遗传疾病的潜在治疗方法.
- 关于基因毒性和免疫性方面的担忧,以及传统测序的局限性,阻碍了AAV-CRISPR疗法的临床转化.
- 由于检测挑战,DMD模型中AAV-CRISPR诱导的双链断裂的确切后果尚不清楚.
研究的目的:
- 为了全面调查AAV-CRISPR转导的基因组和转录组后果.
- 评估长读测序技术在检测AAV-CRISPR编辑结果中的有效性.
- 识别意外的目标和目标之外的编辑事件和AAV集成站点.
主要方法:
- 在肌肉细胞和DMD小鼠模型上采用了长读和短读测序技术.
- 使用纳米孔Cas9向测序 (AS-nCATS) 进行自适应采样,用于AAV集成量化.
- 开发了一种纳米孔快速放大cDNA末端 (nRACE-seq) 管道,用于检测编辑的转录末端.
主要成果:
- 确定了在目标上意外的大插入和反转作为常见的AAV-CRISPR编辑结果.
- 发现全长AAV集成的可能性与在目标上删除一样大.
- nRACE-seq管道成功检测到AAV-Dmd的模拟转录,拼接错误和目标之外的集成站点.
结论:
- 这些发现提供了对AAV-CRISPR双链断裂介导疗法的适应对单一性疾病的关键见解.
- 强调先进的长读测序方法对于全面的CRISPR评估的重要性.
- 促进编辑结果评估的标准化,以推进AAV-CRISPR的临床应用.
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