开发强大的冷干燥工艺,以确保rVSV-SARS-CoV-2疫苗的长期稳定性
M D Faizul Hussain Khan1, Maryam Youssef1, Sean Nesdoly1
1Viral Vectors and Vaccines Bioprocessing Group, Department of Bioengineering, McGill University, Montreal, QC H2X 1Y4, Canada.
Viruses
|June 27, 2024
概括
像VSV-SARS-CoV-2这样的冷干燥封装病毒疫苗可以提高热稳定性. 优化的配方和控制的干燥温度可以保持病毒感染力,减少冷链需求.
科学领域:
- 生物技术是生物技术.
- 疫苗开发 疫苗开发
- 病毒学 病毒学
背景情况:
- 包裹病毒载体疫苗的热稳定性是一个重要的交付挑战.
- 冷干燥提供了一个有前途的解决方案,但对病毒完整性,特别是包裹构成风险.
研究的目的:
- 开发一种冷干燥方法,用于表达SARS-CoV-2尖端糖蛋白的复合囊泡性口腔炎病毒 (VSV).
- 为了优化配方,增强病毒恢复和蛋糕稳定性后的粉碎化.
主要方法:
- 使用冷保护剂 (糖糖,三糖,醇),冷保护剂 (曼尼托尔) 和缓冲剂 (histidine) 的配方研究.
- 研究水分含量,辅助剂度和二次干燥温度.
- 优化配方在2-8°C的长期稳定性评估.
主要成果:
- 在3-6%的水分含量下达到最佳的传染性恢复 (~0.5-1日志损失).
- 增加冷保护剂/冷保护剂度 (10%) 和添加0.5%的凝改善了病毒恢复和蛋糕稳定性.
- 二次干燥温度高于20°C显著降低了病毒感染力.
结论:
- 一个优化的冷干燥工艺和配方 (10%的糖,10%的曼尼托尔,0.5%的凝,10毫米的胺) 确保疫苗在2-8°C下稳定6个月.
- 这种方法尽量减少对病毒载体疫苗昂贵的冷链分销系统的依赖.
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