通过寡合化和辅助剂选择来增强热稳定,有效的SARS-CoV-2疫苗配方的免疫性
Mohammad Suhail Khan1, Virginie Jakob2, Randhir Singh3
1Molecular Biophysics Unit (MBU), Indian Institute of Science, Bengaluru 560012, India.
Pharmaceutics
|December 23, 2023
概括
一种稳定受体结合域 (RBD) 候选疫苗在暴露于热量后保留了免疫性和保护性疗效. 三分化和特定的辅助剂进一步增强了免疫反应,这表明热稳定疫苗的潜力.
科学领域:
- * 疫苗学和免疫学
- * 冠状病毒研究
背景情况:
- *目前的严重急性呼吸道综合征-冠状病毒-2 (SARS-CoV-2) 疫苗需要冷链储存,限制全球可访问性.
- * 开发热稳定的疫苗配方对于广泛覆盖至关重要,特别是在资源有限的环境中.
研究的目的:
- * 在长时间暴露于热量后,评估稳定受体结合域 (RBD) 的免疫性和保护功效.
- *评估RBD三分化和新型辅助剂对B细胞和T细胞反应的影响.
主要方法:
- *稳定RBD在37°C化一个月,然后配制辅助剂 (水中的烯乳液,脂质体或氧化).
- *辅助剂包括一种合成的托尔类受体4 (TLR-4) 连接体和/或沙波宁QS-21.
- *免疫性通过抗体标位和中和能力来评估;T细胞反应也被分析.
主要成果:
- * 在暴露于热量的情况下,稳定RBD保留了免疫性和保护功效.
- * RBD三元化显著增强了免疫性,使得单剂量后可以检测到抗体标位.
- *含有沙尼QS-21的辅助剂的性能优于乳液和氧化配方;含有TLR-4连接体和沙尼的脂质体辅助剂诱导了强烈的Th1反应和更高的中和度.
结论:
- * 稳定RBD配方显示出热稳定性的潜力,克服了冷链的局限性.
- *三分化和先进的辅助剂 (沙宁,TLR-4配体) 显著提高了疫苗的免疫性.
- *这些发现支持开发耐热疫苗,以改善全球接种和持续保护针对特有SARS-CoV-2的疫苗.
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