登革热病毒特异性记忆B细胞子集因感染史不同而有所不同
bioRxiv : the preprint server for biology
|February 12, 2026
概括
多重登革热病毒 (DENV) 感染改变了记忆B细胞 (MBC) 的子集,而不仅仅是总数. 在二次DENV暴露后,这种DENV特异性MBC的质量转变有助于保护性免疫.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 传染性疾病 传染性疾病
背景情况:
- 登革热病毒 (DENV) 血清型1-4对全球健康构成重大风险.
- DENV感染诱导保护性免疫力,与记忆B细胞 (MBCs) 潜在地赋予长期保护.
- 在多次DENV感染后,DENV特异性MBC的发展尚不清楚.
研究的目的:
- 综合评估DENV特异性B细胞子集在具有初级 (1°) 与二级 (2°) DENV感染史的个体中的频率.
- 评估DENV特异性MBCs从急性感染到症状出现后18个月的时间动态.
- 为了确定二次DENV免疫是否导致内存B细胞池的定量或定性变化.
主要方法:
- 分析了58个登革热病例的样本,感染史不同 (初级和二级).
- 对九个不同的DENV特异性B细胞子集的综合评估.
- 纵向采样以追踪MBC动态在症状出现后18个月.
主要成果:
- 尽管总频率相似,但DENV特异性B细胞频率在初级和二级感染之间的子集水平上有显著差异.
- 持久的DENV特异性MBC子集 (IgG+,IgM+,非典型,类切换IgD-) 在多次暴露中积累.
- 某些DENV特异性MBC子集在继发性免疫中晚些时候 (>症状出现后3个月) 达到峰值,这表明正在进行成熟.
结论:
- 基于感染史,DENV特定的MBC子集是不同的,这表明了对内存池的定性重编程,而不是简单的定量提升.
- 在二次DENV免疫中,特定的MBC子集的积累和延迟成熟可能有助于增强保护性反应.
- 这些发现突出了连续DENV感染产生的复杂的免疫记忆.
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