疫苗接种前的免疫代谢相互作用决定了对登革热病毒疫苗的保护性抗体反应
Adam-Nicolas Pelletier1, Gabriela Pacheco Sanchez2, Abdullah Izmirly3
1RPM Bioinfo Solutions, Sainte-Thérèse, QC, Canada; Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, USA.
Cell reports
|June 20, 2024
概括
一种系统疫苗学方法确定了疫苗接种前的免疫特征,预测了对登革热疫苗 (DENV) 强烈的抗体反应. 代谢物和天生的免疫细胞状态影响着对登革热病毒的保护性免疫力.
科学领域:
- 免疫学 免疫学 免疫学
- 系统 疫苗学 疫苗学
- 登革热病毒研究研究
背景情况:
- 对登革热病毒 (DENV) 的保护性免疫需要针对所有四种血清型的强有力的抗体反应.
- 开发有效的DENV疫苗需要了解推动广泛和持久免疫保护的因素.
研究的目的:
- 确定疫苗接种前的免疫特征和机制,这些特征和机制可以预测四价活减弱DENV疫苗 (Butantan-DV/TV003) 免疫接种后的广泛抗体反应.
- 阐明特定代谢物和先天性免疫细胞状态在调节疫苗诱导的抗体反应中的作用.
主要方法:
- 采用系统疫苗学方法,整合了从疫苗接种前样本中获取的多omics数据.
- 分析了先天性免疫细胞表型 (CD68low/hi单细胞),代谢物概况 (脂胆,脂乙醇胺,胆酸) 和疫苗接种后抗体反应之间的相关性.
- 进行了体外实验,以确认代谢物对免疫路径的功能影响.
主要成果:
- 一个涉及抗炎途径 (CD68低单细胞中的TGF-β信号传递) 和特定代谢物 (酸丁胆,酸丁乙醇胺) 的疫苗接种前签名与广泛的中和抗体对DENV的反应正相关.
- 相反,促炎途径 (IFN,CD68hi单细胞中的IL-1) 和胆酸与广泛的DENV特异性抗体反应有负相关性.
- 酸丁/酸丁乙醇胺诱导TGF-β,而胆酸诱导单细胞子集中的IFN,而TGF-β在体外抑制病毒传感.
结论:
- 特定代谢物与先天免疫细胞的炎症状态之间的平衡是B细胞对活体减弱DENV疫苗的广泛和保护性反应的关键决定因素.
- 这些发现提供了对影响疫苗疗效的宿主因素以及增强登革热疫苗免疫性潜在策略的见解.
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