通过抗原重定向来设计疫苗
Duo Xu1,2, Joshua J Carter2,3,4, Chunfeng Li5
1Department of Biochemistry, Stanford University School of Medicine, Stanford, CA, USA.
Nature chemical biology
|January 15, 2024
概括
科学家们开发了一种导向病毒抗原的新方法,增强对像流感血质素干这样的保护区域的免疫反应. 这种方法对制造具有广泛保护性的通用疫苗充满希望.
科学领域:
- 疫苗学 疫苗学 疫苗学
- 免疫学 免疫学 免疫学
- 结构生物学 结构生物学
背景情况:
- 开发通用疫苗需要向保存的病毒表位,如流感血素干 (HA-stem),远离像HA-head这样的变量区域.
- 目前的疫苗策略往往难以引起专注于这些保存的免疫原性区域的免疫反应.
研究的目的:
- 引入和验证一种新的抗原重定向策略,以增强对保存病毒表位体的免疫反应.
- 为了证明这种方法在不同的病毒抗原中具有普遍性,包括流感,埃博拉和SARS-CoV-2.
主要方法:
- 特定地点插入阿斯巴酸盐残留物以控制抗原导向并促进与辅助剂的结合.
- 将H2血凝素 (H2HA) 重定向为"倒置"的配置 (reoH2HA),以增强HA干暴露和免疫性.
- 评估中和抗体反应和使用电子显微镜多克隆性内皮图映射 (EMPEM) 的内皮图映射.
主要成果:
- 抗原重定位增强了对埃博拉病毒,SARS-CoV-2和流感病毒抗原的中和抗体反应.
- 重定向的H2 HA (reoH2HA) 诱导了强大的干向抗体.
- 这些抗体表现出对1组和2组流感A亚型的交叉反应性,EMPEM证实了这一点.
结论:
- 抗原重定位是设计以表位为重点的疫苗的一种多功能策略.
- 这种方法可以有效地将免疫反应引导到保存的病毒表位,从而可能导致广泛的保护性疫苗.
- 这项研究为开发下一代针对流感等高度变化的病毒的疫苗提供了一个新的平台.
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