一种基于MVA的向量表达无细胞ISG15,增加IFN-I的产生,并改善HIV-1特异性CD8 T细胞免疫反应
Michela Falqui1, Beatriz Perdiguero2,3, Rocio Coloma1
1Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid, Madrid, Spain.
Frontiers in cellular and infection microbiology
|June 14, 2023
概括
干扰素刺激基因15 (ISG15) 作为免疫辅助剂,增强对HIV-1疫苗的反应. 通过MVA载体输送的ISG15 (ISG15AA) 的修饰形式比野生类型更有效地促进了HIV-1特定的CD8T细胞.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 病毒学 病毒学
背景情况:
- 人类免疫缺陷病毒 (HIV) 仍然是一个全球性的健康挑战,没有治愈或疫苗.
- 干扰素刺激基因15 (ISG15) 是一种参与细胞反应的免疫蛋白,可以作为辅助剂.
- 以前的研究表明,ISG15在DNA prime/MVA中具有辅助作用,可以促进HIV-1疫苗接种策略.
研究的目的:
- 为了评估ISG15的辅助作用,当通过修改的疫苗病毒安卡拉 (MVA) 载体表达时.
- 为了比较野生型ISG15 (ISG15GG) 与无法作为辅助剂进行ISGylation的突变形式 (ISG15AA) 的疗效.
主要方法:
- 产生和描述两个表达ISG15GG或ISG15AA的新型MVA重组剂.
- 使用异质DNA原始/MVA增强方案与MVA-B (HIV-1抗原) 结合MVA-ISG15GG或MVA-ISG15AA的小鼠免疫.
- 评估HIV-1特定的CD8T细胞反应和I型干扰素 (IFN-I) 水平.
主要成果:
- 与MVA-ISG15GG相比,MVA-ISG15AA载体与MVA-B相结合,显著增加了与MVA-ISG15GG相比,HIV-1特异性CD8T细胞的数量和质量.
- 从MVA矢量表达ISG15AA导致释放的IFN-I的水平更高.
- 突变ISG15AA在这种HIV-1疫苗模型中表现出优异的免疫刺激活性,作为辅助剂.
结论:
- ISG15是疫苗开发中的一个有价值的免疫辅助剂,特别是针对HIV-1.
- 与野生型ISG15.15相比,非ISGylating突变ISG15AA显示了增强的免疫刺激特性.
- ISG15AA代表了未来HIV-1免疫接种方案的一个有希望的组成部分.
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