PCV13疫苗可以预防肺炎球菌生物膜,而不会影响多微生物生物膜中的黄金葡萄球菌群
Julio Sempere1,2, José Yuste1,2, Mirian Domenech1,2,3
1Spanish Pneumococcal Reference Laboratory, National Center for Microbiology, Instituto de Salud Carlos III, Madrid, Spain.
Frontiers in immunology
|November 18, 2024
概括
肺炎球菌结合疫苗 (PCV) 有效地减少了Streptococcus pneumoniae生物膜,但对金黄色葡萄球菌没有影响. 在混合生物膜中,PCV13免疫血清降低了特定的肺炎球菌血清型,突出了潜在的疫苗逃避策略.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
背景情况:
- 肺炎链球菌 (Streptococcus pneumoniae) 形成的生物膜有助于鼻菌殖民和慢性呼吸道感染.
- 肺炎球菌结合疫苗 (PCV) 影响S. pneumoniae的殖民化,可能导致其他病原体 (如金黄色葡萄球菌) 取代它.
- 了解细菌生物膜的免疫逃避对于开发有效的预防和治疗策略至关重要.
研究的目的:
- 评估单种S. pneumoniae和Staphylococcus aureus生物膜以及混合的S. aureus-S. pneumoniae生物膜的免疫系统逃避能力.
- 评估接种PCV13疫苗的个人的血清对这些生物膜的疗效.
主要方法:
- 使用人类HL-60细胞进行了OPSONOPHAGOCYTOSIS (OPA) 试验.
- 测试使用了分类的单种生物膜,分类为对甲素敏感的黄金色细菌 (MSSA),对甲素耐药的黄金色细菌 (MRSA) 和混合的黄金色细菌和肺炎细菌生物膜.
- 使用了接种PCV13疫苗的成年患者的免疫前和免疫后血清.
主要成果:
- 接种PCV13疫苗的个体的免疫血清显著减少了3,14,18C,19F和19A血清型的肺炎球菌生物膜,但不是非PCV13血清型 (8,11A,24F).
- PCV13免疫血清在单种生物膜中没有降低黄金色细菌种群的影响,不管甲基西林耐药性如何.
- 在混合生物膜中,PCV13免疫血清没有影响黄金色细菌,但显著减少了肺炎球菌血清型19A菌株,这种血清型包括在PCV13中,与疫苗失败有关.
结论:
- 接种PCV13疫苗可以保护生物膜中的特定的S. pneumoniae血清型.
- 尽管接种了PCV13疫苗,但S. aureus可以在单种和混合生物膜中持续存在,这表明殖民和感染的可能性.
- 在混合生物膜中对S. pneumoniae血清型19A的有效性降低需要进一步调查,因为它与疫苗失败有关.
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