一种广谱肺炎球菌疫苗诱导粘膜免疫,并保护人免受致命的肺炎球菌挑战
Fang-Feng Chiu1, Ling-Ling Tu1, Wangxue Chen2
1National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan.
Emerging microbes & infections
|October 19, 2023
概括
使用三种毒性因子 (LAAC) 的新型广谱肺炎球菌疫苗显示出有前途. 在小鼠中,LAAC免疫引发了强烈的免疫反应和对各种Streptococcus pneumoniae血清型的保护.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 微生物学 微生物学
背景情况:
- 肺炎球菌病构成了全球公共卫生威胁,目前的疫苗面临诸如血清型替代等挑战.
- 迫切需要新型疫苗,以提供更广泛的防护Streptococcus pneumoniae.
研究的目的:
- 开发和评估一种新的,广泛的,基于蛋白质的肺炎球菌疫苗候选人.
- 评估疫苗对各种肺炎球菌血清型的免疫性和保护功效.
主要方法:
- 开发一种基于蛋白质的疫苗,包括脂化PsaA (rlipo-PsaA),截断的PspA (rPspAΔC) 和截断的PspC (rPspCΔC),称为LAAC.
- 用LAAC对小鼠进行鼻腔免疫,并评估IgG和IgA抗体标位,免疫细胞反应和声细胞.
- 通过多种Streptococcus pneumoniae血清型的细菌挑战对疫苗有效性的评估和生存率分析.
主要成果:
- 与非脂类疫苗成分相比,鼻内LAAC免疫诱导的IgG和IgA标位显著更高.
- LAAC引发了全身粘膜免疫和Th1/Th17偏倚的免疫反应,促进了各种肺炎球菌血清型的声性细胞化.
- 接种LAAC免疫的小鼠表现出较低的细菌负载和较高的抗PCV13和非PCV13血清型挑战的生存率.
结论:
- 开发的基于蛋白质的肺炎球菌疫苗 (LAAC) 显示出广泛的免疫性和保护性.
- 美国肺炎防治中心 (LAAC) 提出了一项有前途的战略,以克服当前疫苗的局限性,并对抗各种肺炎球菌感染.
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