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对Cas9表达的时间限制提高了CRISPR介导的删除效率和保真度

Jesse A Weber^1,2, Jonathan F Lang^1,2, Ellie M Carrell¹

¹Raymond G. Perelman Center for Cellular and Molecular Therapeutics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.

Molecular therapy. Nucleic acids

|July 9, 2024

概括

对于大缺失的CRISPR-Cas9基因编辑是低效的,因为内在的痕. 可诱导的CRISPR-Cas9表达提高了删除效率和治疗应用的等位基异质性评估.

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:

针对大删除的CRISPR-Cas9基因编辑在临床应用中面临挑战,特别是在评估单基与双基删除时.
在指导RNA切割部位的非同时核酶活性导致的内性痕阻碍了CRISPR删除的 in vitro 和 in vivo 疗效.

研究的目的:

建立一个单细胞模型系统,用于研究CRISPR介导删除中的等位基异质性.
确定CRISPR删除功效的障碍,并制定提高其治疗应用效率的策略.

主要方法:

开发了一个模型系统,用于单细胞分析等位基异质性.
作为克里斯普尔-del疗效的障碍,研究了痕.
利用可诱导的腺相关病毒 (AAV) 和脂质纳米粒子 (LNP) 来限制CRISPR-Cas9的表达.
使用X^on磁带进行可诱导的基于AAV的表达.

主要成果:

鉴定了因非同时核酶活性引起的内性痕作为CRISPR-del疗效的重大障碍.
证明通过可诱导的AAV或LNP限制CRISPR-Cas9表达,可以部分阻止非同时的核酶活性.
表明可诱导的基于AAV的表达在体内与构成表达相比,显著改善了单基和双基除频率.

结论:

可诱导的基于AAV的CRISPR-del机制增强了删除频率,并提供了对等位基异质性的见解.
研究结果支持使用可诱导系统而不是构成性系统,以提高CRISPR-del的效率.
这种方法可以为需要大量单元或双元除的遗传疾病的治疗策略提供信息.

关键词:

在AAV中,AAV是AAV,AAV是AAV.这就是CRISPR/Cas9的作用.一个LNP就是LNP.MT:RNA/DNA编辑编辑双的删除是双的删除.免疫耐受性免疫耐受性监管表达式是一种受监管的表达式.

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