由IgA驱动的中性粒细胞激活是人类寨卡病毒后严重登革热病的基础
Jaime A Cardona-Ospina1,2, Vicky Roy3, Dorca E Marcano-Jiménez4
1Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA.
medRxiv : the preprint server for health sciences
|March 31, 2025
概括
初级寨卡病毒 (ZIKV) 感染通过抗NS1 IgA抗体增加严重登革热病毒 (DENV2) 风险. 这些抗体激活中性粒细胞,导致严重的登革热出血性发烧/登革热休克综合征 (DHF/DSS) 和血管泄漏.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 公共卫生 公共卫生
背景情况:
- 登革热病毒 (DENV) 和寨卡病毒 (ZIKV) 构成了全球健康威胁.
- 之前的ZIKV感染增加了严重DENV2疾病的风险,这对ZIKV疫苗开发构成了挑战.
- 目前尚不完全了解ZIKV增强DENV2严重性背后的机制.
研究的目的:
- 调查原发性ZIKV感染加剧后续DENV2疾病的机制.
- 为了确定特定的抗体和细胞反应,涉及到ZIKV-primed DENV2的发病.
主要方法:
- 利用了尼加拉瓜长期进行的儿科登革热队列研究的数据.
- 采用了血清抗NS1 IgA抗体分析,中性粒细胞激活试验 (NETosis) 和抗体耗尽实验.
- 与临床结果相关的抗体发现,包括血管泄漏和DHF/DSS.
主要成果:
- 来自ZIKV感染个体的血清抗NS1 IgA抗体会激活中性粒细胞.
- 在DHF/DSS模型中,抗NS1IgA的耗尽减少了中性粒细胞的激活.
- 增加中性粒细胞脱粒度与IgA与DENV2 NS1结合相关,并且在DENV2患者的血管泄漏之前.
结论:
- 血清抗NS1 IgA抗体在严重登革热期间增强中性粒细胞激活起着至关重要的作用.
- 这些发现对理解DENV-ZIKV相互作用,疾病预后和疫苗策略有影响.
- 向抗NS1 IgA或中性粒细胞激活可能提供治疗或预防性益处.
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