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在基因组中使用高效同质导向插入,使用工程化归属内核酶ARCUSUS

Laura Christian Resly¹, Alan L Tubbs¹, Alexander J Vogel¹

¹Precision BioSciences, Inc. Durham, NC, United States.

Nucleic acids research

|October 5, 2025

概括

ARCUS核酶通过促进高同源重组率 (HR) 实现精确的基因编辑. 这种灵活的DNA编辑系统可以在各种细胞类型中实现高效的基因插入和校正,用于治疗应用.

科学领域:

分子生物学分子生物学
基因编辑技术的技术
基因组医学是基因组医学.

背景情况:

同源重组 (HR) 是一种多功能基因编辑机制,但需要特定的酶才能有效地发挥作用.
现有的基因编辑工具在实现所有所需的编辑类型 (插入,删除,替换) 方面存在局限性.

研究的目的:

研究ARCUS核酶提高同源重组 (HR) 效率的机制.
为了证明ARCUS核酶在各种基因编辑应用中的能力.
评估ARCUS在不同细胞类型的效率,包括非循环肝细胞.

主要方法:

工程ARCUS核酶来自于I-CreI指向内核酶.
使用ARCUS DNA切割产生的3'悬架来触发HR.
评估单基因变化,删除,插入和淋巴细胞中大片段替换的基因编辑效率.
在非循环肝细胞中评估ARCUS介导的插入.

主要成果:

在 ARCUS 中,核酶产生 3' 突起,从而显著提高 HR 速率.
单个ARCUS编辑器便于所有主要的基因编辑方法 (基因变化,删除,插入,替代) 在淋巴细胞中达到60%-90%的效率.
在非循环肝细胞中通过非经典的HR通路实现了高效 (30% - 40%),精确的基因插入.

结论:

ARCUS核酶代表了一种灵活且高效的基因编辑系统.
对于ARCUS介导的HR,3'悬架生成非常重要.
这项技术对治疗性基因插入和校正具有重大潜力.

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