接种O结合曼南的疫苗可以通过先天性淋巴细胞群来预防系统性角膜病
Cleison Ledesma Taira1, Lucas Dos Santos Dias2, Sarah Lichtenberger1
1Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI.
Journal of immunology (Baltimore, Md. : 1950)
|August 7, 2024
概括
来自Blastomyces的O结合的曼南,没有抗原,可以防止Candida感染. 这种保护依赖于Dectin-2和先天性免疫细胞,提供了针对真菌病原体的新疫苗策略.
科学领域:
- 菌类学 菌类学是指菌类学.
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
背景情况:
- 在Candida spp. 是导致医院感染和侵袭性真菌病的主要原因.
- 目前针对真菌病原体的疫苗是没有的.
- 布拉斯托米塞斯Dectin-2连接体内葡萄糖酶2 (Eng2) 已经显示出针对布拉斯托米塞斯的疫苗潜力以及对其他病原体的辅助性质.
研究的目的:
- 调查Blastomyces Eng2中的O-曼南单独能否提供对Candida感染的保护.
- 阐明O-曼南介导保护的基础机制.
主要方法:
- 在小鼠中的全身性候群病模型.
- 评估真菌负载,存活率和免疫细胞种群.
- 关于德克丁-2 的依赖性研究.
- 分析先天性淋巴细胞激活和反应性氧物种的产生.
主要成果:
- 单独Blastomyces O-mannans显著降低了脏真菌负担,并以Dectin-2依赖的方式增加了生存率.
- 保护通过先天性淋巴细胞群,包括TCR-γδ+ T细胞,先天性淋巴细胞和NK细胞进行介导.
- 这些细胞随后激活了中性粒细胞和单细胞,释放了活性氧物种.
结论:
- 布拉斯托米塞斯O-曼南可以独立于抗原,诱导长期保护系统性候群病.
- 这种保护由Dectin-2介导,并涉及由先天性淋巴细胞协调的训练免疫反应.
- 这些发现表明,针对侵袭性真菌感染,基于甘氨酸的新型疫苗策略.
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