人类记忆CD4+T细胞在更广泛的病原体特异性反应中识别了结核菌感染的巨细胞
Volodymyr Stetsenko1, Daniel P Gail1, Scott Reba1
1Division of Infectious Diseases and HIV Medicine, Department of Medicine, University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA.
bioRxiv : the preprint server for biology
|March 10, 2025
概括
识别受Mycobacterium tuberculosis (Mtb) 感染的巨细胞的T细胞对于预防结核病至关重要. 这项研究量化了T细胞激活,揭示了大多数Mtb特异性T细胞能够识别受感染的巨细胞,这对于疫苗开发至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 传染性疾病 传染性疾病
- 微生物学 微生物学
背景情况:
- 通过CD4+T细胞识别受Mycobacterium tuberculosis (Mtb) 感染的巨细胞,对于预防结核病至关重要.
- 然而,并非所有抗原特异性T细胞都能有效地识别受感染的巨细胞,这对免疫力和疫苗设计构成了挑战.
研究的目的:
- 在患有潜藏性结核病感染 (LTBI) 的人群中,量化T细胞激活对Mtb感染的巨细胞的反应.
- 描述MTb特异性T细胞的T细胞受体 (TCR) 谱和效应器功能.
主要方法:
- 使用单细胞衍生巨细胞 (MDM) 和来自LTBI个体的自主记忆CD4+T细胞.
- 采用T细胞受体 (TCR) 测序和单细胞转录组学来分析T细胞反应.
主要成果:
- 在LTBI中,超过70%的独特和90%的Mtb特异性TCR克隆类型与识别Mtb感染的巨有关.
- 鉴定了针对多个Mtb抗原和其他病原体的特异性T细胞克隆类型,表明了特异性和非特异性激活.
- 特定于mtb的T细胞表现出效应因子功能,包括IFNγ,TNF,IL-2和GM-CSF的产生,以及化学激素的信号传递.
结论:
- 在LTBI中,大多数Mtb特异性T细胞能够识别受感染的巨细胞,这凸显了这种相互作用对免疫监测的重要性.
- 建议结核病疫苗诱导识别受感染巨细胞和表达关键效应因子功能的T细胞将对结核病有保护作用.
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