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系统的高通量评估揭示了FrCas9在治疗性基因组编辑方面的卓越特异性和效率

Rui Tian¹, Xun Tian², Meiying Yang³

¹Generulor Company Bio-X Lab, Zhuhai 519000, China.

Science advances

|March 26, 2025

概括

与SpCas9和OpenCRISPR-1相比,FrCas9是一种新的CRISPR系统,在治疗性基因组编辑方面显示出更高的精度和效率. 它的TREX2融合形式进一步增强了基因组稳定性,使其成为细胞和基因治疗应用的理想选择.

科学领域:

遗传学和基因组学遗传学和基因组学
分子生物学分子生物学
生物技术是生物技术.

背景情况:

克里斯普尔-Cas9技术已经改变了基因组编辑,但由于非目标效应而面临限制.
由于需要高度特定和安全的编辑工具,CRISPR的临床应用受到阻碍.

研究的目的:

系统评估FrCas9的性能,这是来自*Faecalibaculum rodentium*的CRISPR变体,用于细胞和基因疗法 (CGT).
为了比较FrCas9的目标活动和目标外影响,与SpCas9和OpenCRISPR-1进行比较,这是一个新的LLM合成的CRISPR系统.
评估TREX2与FrCas9融合对基因组稳定性的影响.

主要方法:

用于*in vivo*DNA编辑 (AID-seq),Amplicon测序和通过测序 (GUIDE-seq) 实现全基因组DSB的无偏见识别来评估编辑结果.
评估了多个基因组位置的目标效率和目标以外的配置文件.
选了1903个单导向RNA (sgRNAs),使用顺序高通量方法准21个CGT相关基因.

主要成果:

与SpCas9和OpenCRISPR-1相比,FrCas9在目标上表现出显著更高的效率,并且显著减少了目标之外的影响.
与FrCas9的TREX2融合有效地减少了大型删除和转位,从而改善了基因组稳定性.
通过综合查,确定了21个CGT相关基因的最佳sgRNA.

结论:

特别是当与TREX2融合时,FrCas9代表了一个高度特定和高效的基因组编辑工具,用于精确的治疗应用.
这项研究提供了一个强大的高通量选平台,用于识别CGT的高级CRISPR系统和sgRNA.
FrCas9显示出在临床环境中提升基因组编辑的安全性和有效性的巨大潜力.

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