编码SARS-CoV-2感染的广泛中和抗体的mRNA的肺选择性输送
Wanbo Tai1,2, Kai Yang3, Yubin Liu1
1New Cornerstone Science Laboratory, Tsinghua-Peking Joint Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, 100084, China.
Nature communications
|December 5, 2023
概括
传递广泛中和抗体的肺选择性信使RNA (mRNA) 有效地保护小鼠免受SARS-CoV-2变种的侵害. 这种方法可以提高肺部的抗体水平,为预防和治疗呼吸道病毒感染提供了一个有希望的策略.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 生物技术是生物技术.
背景情况:
- 肺部是SARS-CoV-2 (严重急性呼吸系统综合征冠状病毒2) 感染的主要部位,导致严重的病理损伤.
- 目前向肺部输送抗体的方法存在局限性,包括可行性低和抗体半衰期短.
- 使者RNA (mRNA) 技术为肺内向抗体生产提供了一个潜在的解决方案.
研究的目的:
- 识别和表征一种广泛中和的人类单克隆抗体,用于对抗SARS-CoV-2变种.
- 评估基于mRNA的肺向抗体输送平台的有效性.
- 在小鼠模型中评估肺选择性mRNA抗体输送对SARS-CoV-2变体的保护作用.
主要方法:
- 对抗SARS-CoV-2尖端蛋白的人类单克隆抗体8-9D的鉴定和结构分析.
- 为8-9D抗体开发一种信使RNA (mRNA) 传递系统.
- 肺选择性与非选择性mRNA输送在K18-hACE2转基因小鼠中的比较.
- 使用SARS-CoV-2的Beta和Omicron BA.1变体的挑战研究.
主要成果:
- 人类单克隆抗体8-9D对SARS-CoV-2变种表现出广泛的中和作用,包括Omicron BA.5.5.
- 结构分析揭示了8-9D的中和机制.
- 8-9D mRNA的肺选择性输送导致肺中的高滴度中和抗体.
- 这种有针对性的输送有效地保护了小鼠免受SARS-CoV-2 Beta和Omicron BA.1变异的挑战.
结论:
- 广泛中和抗体的肺选择性mRNA输送是预防SARS-CoV-2感染的可行策略.
- 通过mRNA输送的8-9D抗体显示出对抗循环的SARS-CoV-2变种的巨大潜力.
- 这种方法对预防和治疗呼吸道病毒感染充满希望.
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