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对心脏基因组编辑的长期疗效和安全性,针对catecholaminergic多态心室性心跳动

Oliver M Moore^1,2,3, Yuriana Aguilar-Sanchez^1,2, Satadru K Lahiri^1,2

¹Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX 77030, USA.

The journal of cardiovascular aging

|March 11, 2024

概括

通过使用AAV9载体进行CRISPR/Cas9基因组编辑,通过破坏突变RYR2等位基因,安全有效地预防了小鼠模型中catecholaminergic多形心室性心律失常 (CPVT) 的致命性心律失常.

科学领域:

心血管遗传学心血管遗传学
基因治疗基因治疗
分子心脏病学分子心脏病学

背景情况:

catecholaminergic多形心室性心跳动 (CPVT) 是由RYR2变异引起的遗传性心律失常,导致高死亡率.
CRISPR/Cas9基因组编辑通过向突变的RYR2等位基因来提供潜在的治疗方法,但其安全性和有效性需要在疾病模型中进行验证.

研究的目的:

在CPVT的小鼠模型中评估腺相关病毒类型-9 (AAV9) 介导的体质基因组编辑的疗效和安全性.
为了确定CRISPR/Cas9是否可以通过移除R176Q/+小鼠中的突变RYR2等位基因来预防心室节律失常.

主要方法:

对Ryr2 R176Q变异异的小鼠接受了带有指导RNA和SaCas9.9的皮下AAV9注射.
评估了心室节律失常,并通过心声学监测心脏功能/结构,注射后长达12个月.
深度RNA测序分析了目标和目标之外的编辑,并量化了RyR2表达水平.

主要成果:

与对照小鼠相比,AAV9介导的CRISPR/Cas9编辑导致治疗小鼠的腹腔失常率减少了100%,持续了12个月.
基因组编辑导致了目标部位的插入/删除,对野生类型的等位基因产生了最小的非目标效应.
RyR2 mRNA和蛋白质水平分别降低了45%和38%,对心脏功能或结构没有不良影响.

结论:

AAV9介导的CRISPR/Cas9基因组编辑是一种安全有效的策略,用于破坏CPVT小鼠模型中的突变RYR2等位基因.
这种方法成功地预防了致命的心律失常,同时保持正常的心脏功能,证明了CPVT的治疗潜力.

关键词:

这就是CRISPR/Cas9的作用.катехолами内尔基多形室内心动脉短拍.在 RyR2R2 里.基因组编辑基因组编辑赖诺丁受体的受体是什么

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