在体内生产工程化ACE2诱可以保护肺部免受SARS-CoV-2感染
Yuta Suzuki1, Takayuki Miyazaki1, Yoko Ida2
1Tsukuba Research Laboratories, Eisai Co., Ltd., Ibaraki 300-2635, Japan.
Molecular therapy. Nucleic acids
|March 3, 2025
概括
下一代mRNA疗法编码了一个工程化的ACE2诱,3N39v4,用于对抗快速突变的SARS-CoV-2变种. 这种新的方法在临床前模型中显示了广泛的中和和改善的结果,提供了一个有前途的紧急治疗策略.
科学领域:
- 生物技术是生物技术.
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
背景情况:
- 严重急性呼吸系统综合征冠状病毒-2 (SARS-CoV-2) 变种不断出现,逃避免疫反应.
- 迫切需要适应性疗法,可以快速部署来应对不断变化的病毒威胁.
研究的目的:
- 设计和评估一种基于mRNA的治疗方法,该疗法编码一种工程 angiotensin转化酶2 (ACE2) 诱,命名为3N39v4.4.
- 评估3N39v4诱对抗SARS-CoV-2变种的体内表达,药理动力学和中和能力.
主要方法:
- 设计了一个编码3N39v4 ACE2诱的mRNA,包括一个高亲和度的ACE2域和一个人类IgG Fc域.
- 将mRNA封装在脂质纳米颗粒中,用于小鼠和子的体内输送.
- 在SARS-CoV-2感染的动物模型中评估了蛋白质表达,药理动力学,病毒中和和治疗疗效.
主要成果:
- 与蛋白质注射相比,小鼠的系统mRNA输送导致3N39v4的剂量依赖表达,具有良好的耐受性和改善的药理动力学.
- 在体内表达的3N39v4表现出对九种SARS-CoV-2变种的广泛中和,包括Omicron JN.1和BA.2.86,以及其他sarbecoviruses.
- 一次mRNA注射改善了SARS-CoV-2感染小鼠的结果,并抑制了子的病毒复制.
结论:
- 用mRNA编码的ACE2诱代表了针对多样化和未来的SARS-CoV-2变异药物的快速开发的可行策略.
- 这项技术在应急准备和打击新出现的病毒性传染病方面具有重大潜力.
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