流感疫苗接种刺激了人类T毛囊辅助细胞反应的成熟
Stefan A Schattgen1, Jackson S Turner2, Mohamed A Ghonim1
1Department of Host-Microbe Interactions, St. Jude Children's Research Hospital, Memphis, TN, USA.
Nature immunology
|August 20, 2024
概括
流感疫苗接种促使一个持久的,多组织的T毛囊辅助 (TFH) 细胞网络. 淋巴结中的这些关键免疫细胞在接种疫苗后表现出持续的反应,与短暂的血液T细胞不同.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 细胞生物学 细胞生物学
背景情况:
- 流感疫苗接种后人类CD4+ T毛囊辅助细胞 (TFH) 的精确分化和特异性尚不清楚.
- 了解TFH细胞动态对于优化疫苗疗效至关重要.
研究的目的:
- 在接种流感疫苗后,确定CD4+ TFH细胞响应的长期演变和特征.
- 研究血液和淋巴结中的TFH细胞的分化途径和亚群异质性.
主要方法:
- 从流感疫苗接种后2年内,从人类志愿者身上抽取血液和排水淋巴结样本的纵向分析.
- 分析循环TFH (cTFH) 和淋巴结 (LN) 的TFH细胞频率,子集和克隆系.
- 评估TFH细胞表型,包括TFH前,记忆TFH,生殖中心 (GC) TFH和IL-10+子集.
主要成果:
- 流感疫苗接种暂时增加了cTFH细胞,但至少在3个月内引起了LN TFH细胞的持续升高.
- 在基线和疫苗接种后确定了明显的LN TFH细胞子集 (T前FH,记忆TFH,GC TFH,IL-10+).
- 在接种第二剂疫苗后,观察到更快地转向GC TFH表型.
- 鉴定了针对内部病毒蛋白的流感特异性TFH克隆系,所有TFH状态都可以在这些系内获得.
结论:
- 人类TFH细胞在接种流感疫苗时建立了一个持久且动态的多组织网络.
- 淋巴结TFH细胞与循环TFH细胞相比,表现出更持久和更复杂的反应.
- 这些发现提供了关于流感疫苗产生的长期细胞免疫力的见解.
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