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一种进化的AAV变异使得小鼠T细胞的有效基因工程成为可能

William A Nyberg¹, Jonathan Ark², Angela To¹

¹Department of Medicine, University of California, San Francisco, San Francisco, CA 94143, USA; Gladstone-UCSF Institute of Genomic Immunology, San Francisco, CA 94158, USA.

|January 13, 2023

概括

研究人员开发了一种合成腺相关病毒Ark313,用于有效编辑小鼠T细胞的基因. 这一突破使得在免疫能力强的模型中进行先进的临床前研究.

科学领域:

免疫学
基因治疗
分子生物学

背景情况:

同性学导向的修复使T细胞中精确的大型转基因整合成为可能,这对于细胞疗法和T细胞生物学至关重要.
腺相关病毒 (AAV) 传递提高了DNA模板的敲击效率.
目前的AAV血清型缺乏小鼠T细胞的热带性,限制了临床前模型的免疫缺陷设置.

研究的目的:

开发一种针对小鼠T细胞的基因编辑方法.
在免疫能力强的小鼠模型中实现T细胞治疗的临床前建模.

主要方法:

在小鼠T细胞中具有高转导效率的合成AAVArk313的演化.
全基因组淘汰屏幕用于识别Ark313感染的宿主因子, 识别QA2.
展示Ark313用于无核感染的DNA传递,CRISPR-Cas9基因编辑和大型转基因整合.

主要成果:

在小鼠T细胞中,Ark313表现出高的转导效率.
QA2被确定为Ark313感染的重要因素.
Ark313促进了无核感染的基因向,包括大型转基因整合和CRISPR- Cas9介导的淘汰.

结论:

在小鼠T细胞中实现有效的基因向,克服当前AAV血清型的局限性.
这一进步允许在免疫能力强的小鼠中进行CAR-T和TCR-T细胞的临床前建模.
在细胞治疗和T细胞免疫学研究方面,Ark313具有显著的潜力.

关键词:

一个 AAV 一个CAR-T单元在CRISPR/Cas9中基因编辑基因定位全基因组的CRISPR屏幕免疫学一个T细胞运行时间:

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In-vitro Mutagenesis

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