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Updated: May 21, 2025

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工程三方基因编辑机器,用于高效的非病毒向基因组集成

Hangu Nam¹, Keqiang Xie², Ishita Majumdar²

¹Department of Bioengineering, Northeastern University, Boston, MA, USA.

Nature communications

|May 16, 2025

概括

我们开发了enGager,这是一种新的CRISPR/Cas9系统,可以提高基因编辑效率. 这种基因组工程工具改善了针对性的DNA整合,为治疗性基因修饰提供了更安全,非病毒性的替代方案.

科学领域:

分子生物学分子生物学
基因编辑技术的技术
基因组学就是基因组学.

背景情况:

非病毒性DNA供体模板通过同源重组 (HR) 促进了针对性基因组集成.
克里斯普尔/Cas9技术提高了基因编辑的HR效率.
圆形单链DNA (cssDNA) 作为基因组工程催化剂 (GATALYST) 进行高效和安全的基因敲进.

研究的目的:

介绍enGager,一个增强的GATALYST关联基因组编辑系统.
提高转基因整合效率,使用绑定的cssDNA捐赠者和修改后的Cas9.
为了评估enGager在各种细胞类型和治疗性基因输送中的有效性.

主要方法:

将cssDNA捐赠者连接到核局部化的Cas9,与单链DNA结合基因组合在一起.
利用enGager系统对记者基因和一个仿真抗原受体 (CAR) 转基因进行有针对性的集成.
评估多个基因组位点的整合效率,跨越各种细胞类型,包括人类T细胞.

主要成果:

enGager显著提高了转基因整合效率,与未融合的Cas9.9相比,其效率高达6倍.
该系统证明了对记者基因的改进目标集成和表达.
在33%的初级人类T细胞中实现了CAR转基因的有效集成,增强了抗瘤功能.
用ssDNA优化基因组工程 (TESOGENASE) 的三方编辑器方法被证明是有效的,特别是在初级细胞中的大型转基因.

结论:

enGager提高了基因组工程的效率和安全性,用于针对性基因整合.
该系统为治疗性基因修饰提供了病毒载体的强有力的非病毒替代品.
enGager对推进基因疗法,包括CAR T细胞疗法,显示出前景.

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