一个计算优化的结构完整性序列提高了疫苗的稳定性,产量和安全性.
Arthur Sarron1, Sun B Sowers2, Yaroslav Tsybovsky3
1Queen's University Belfast.
Research square
|November 19, 2025
概括
一个新的计算管道,VaCRiSta,通过减少自身免疫风险来提高疫苗的安全性. 这种方法优化了疫苗候选人,改善了稳定性,表达和免疫反应,正如疹疫苗候选人所证明的那样.
科学领域:
- 疫苗学 疫苗学 疫苗学
- 计算生物学 计算生物学
- 免疫学 免疫学 免疫学
背景情况:
- 再组合疫苗对全球健康至关重要,但分子模拟的潜在自身免疫反应引起了安全问题.
- 疫苗抗原和人体蛋白质之间的序列相似性理论上可以触发不良的免疫反应.
研究的目的:
- 引入疫苗候选人降低风险和稳定 (VaCRiSta) 计算管道,以提高疫苗的安全性和稳定性.
- 将VaCRiSta应用于 mumps 候选疫苗,以评估其降低风险和稳定能力.
主要方法:
- 综合序列相似性搜索,表位预测,同质模型和分子动力学模拟.
- 在疹F蛋白的背景下,将VaCRiSta管道应用于GCN4三元化域.
- 使用负染色电子显微镜来确认结构完整性.
主要成果:
- 优化的GCN4_QM序列显著减少了人类蛋白质组匹配,减轻了潜在的自身免疫风险.
- GCN4_QM增强了三元F蛋白组合的稳定性,并使蛋白质表达产量翻了一番 (2.2对1.1 mg/L).
- 修改后的蛋白质保持了结构完整性,在小鼠中产生了大约3倍高的中和抗体标位.
结论:
- 该VaCRiSta方法有效地降低风险并稳定候选疫苗,提高安全性,产量和免疫性.
- GCN4_QM作为蛋白质工程和多重体疫苗设计的有价值的结构模块,增强了溶解性.
- 这种计算策略有可能提高疫苗的有效性和向全世界的人口提供疫苗.
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