Nature Biotechnology ( IF 33.1 ) Pub Date : 2024-10-16 , DOI: 10.1038/s41587-024-02437-3 Kai Chen, Hesong Han, Sheng Zhao, Bryant Xu, Boyan Yin, Atip Lawanprasert, Marena Trinidad, Benjamin W. Burgstone, Niren Murthy, Jennifer A. Doudna
Lipid nanoparticle (LNP) delivery of clustered regularly interspaced short palindromic repeat (CRISPR) ribonucleoproteins (RNPs) could enable high-efficiency, low-toxicity and scalable in vivo genome editing if efficacious RNP–LNP complexes can be reliably produced. Here we engineer a thermostable Cas9 from Geobacillus stearothermophilus (GeoCas9) to generate iGeoCas9 variants capable of >100× more genome editing of cells and organs compared with the native GeoCas9 enzyme. Furthermore, iGeoCas9 RNP–LNP complexes edit a variety of cell types and induce homology-directed repair in cells receiving codelivered single-stranded DNA templates. Using tissue-selective LNP formulations, we observe genome-editing levels of 16‒37% in the liver and lungs of reporter mice that receive single intravenous injections of iGeoCas9 RNP–LNPs. In addition, iGeoCas9 RNPs complexed to biodegradable LNPs edit the disease-causing SFTPC gene in lung tissue with 19% average efficiency, representing a major improvement over genome-editing levels observed previously using viral or nonviral delivery strategies. These results show that thermostable Cas9 RNP–LNP complexes can expand the therapeutic potential of genome editing.
中文翻译:
通过脂质纳米颗粒递送稳定的 CRISPR-Cas9 核糖核蛋白进行肺和肝脏编辑
如果能够可靠地产生有效的 RNP-LNP 复合物,则成簇的规则间隔短回文重复序列 (CRISPR) 核糖核蛋白 (RNP) 的脂质纳米颗粒 (LNP) 递送可以实现高效、低毒性和可扩展的体内基因组编辑。在这里,我们从嗜热脂肪芽孢杆菌 (GeoCas9) 中设计了一个热稳定的 Cas9,以产生与天然 GeoCas9 酶相比×能够对细胞和器官进行 >100 更多基因组编辑的 iGeoCas9 变体。此外,iGeoCas9 RNP-LNP 复合物可编辑多种细胞类型,并在接受共递送的单链 DNA 模板的细胞中诱导同源定向修复。使用组织选择性 LNP 制剂,我们观察到接受单次静脉注射 iGeoCas9 RNP-LNP 的报告小鼠肝脏和肺部的基因组编辑水平为 16-37%。此外,与可生物降解的 LNP 复合的 iGeoCas9 RNP 以 19% 的平均效率编辑肺组织中致病的 SFTPC 基因,与以前使用病毒或非病毒递送策略观察到的基因组编辑水平相比,这是一个重大改进。这些结果表明,热稳定的 Cas9 RNP-LNP 复合物可以扩大基因组编辑的治疗潜力。