通过一次低剂量核酸修饰mRNA疫苗进行寨卡病毒保护
Norbert Pardi1, Michael J Hogan1, Rebecca S Pelc2
1Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
Nature
|February 3, 2017
概括
使用信使RNA (mRNA) 纳米颗粒的新型寨卡病毒 (ZIKV) 疫苗显示出有前途. 在小鼠和非人类灵长类动物中,一次的低剂量产生了强大而持久的免疫力.
科学领域:
- 病毒学
- 免疫学
- 疫苗学
背景情况:
- 由于严重的神经病理,寨卡病毒 (ZIKV) 构成严重的全球健康威胁.
- 目前对ZIKV的治疗和预防选择有限,这凸显了对有效疫苗的迫切需要.
研究的目的:
- 评估核酸修饰的mRNA疫苗对寨卡病毒的疗效.
- 评估mRNA疫苗引起的免疫反应和保护的持久性.
主要方法:
- 编码ZIKV前膜和包膜糖蛋白的脂质纳米颗粒封装核酸改性mRNA (mRNA-LNP) 的开发.
- 用不同剂量的mRNA- LNP疫苗对小鼠和非人类灵长类动物进行皮内免疫接种.
- 在接种疫苗后的不同时间点评估中和抗体反应和对ZIKV的保护.
主要成果:
- 一次低剂量皮内免疫在小鼠和非人类灵长类动物中引起了强大而持久的中和抗体反应.
- 接种疫苗的小鼠在接种疫苗后的2周和5个月内获得了对ZIKV的保护.
- 在接种疫苗后5周,一次50微克的剂量保护了非人类灵长类动物免受ZIKV挑战.
结论:
- 核酸修饰的mRNA- LNP疫苗可以迅速诱导对寨卡病毒的持久保护性免疫力.
- 这种mRNA-LNP疫苗是全球ZIKV预防工作的有希望的候选者.
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