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Isolation and Th17 Differentiation of Naïve CD4 T Lymphocytes
Published on: September 27, 2013
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病原体诱导的人类TH17细胞产生IFN-γ或IL-10,并由IL-1β调节
Christina E Zielinski1, Federico Mele, Dominik Aschenbrenner
1Institute for Research in Biomedicine, Via Vincenzo Vela 6, 6500 Bellinzona, Switzerland. christina.zielinski@charite.de
Nature
|April 3, 2012
概括
对Candida albicans或Staphylococcus aureus作出反应的人类T辅助17 (TH17) 细胞表现出不同的特性. 互白素-1β (IL-1β) 和IL-2调节TH17细胞的分化和功能,影响炎症反应.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 微生物学 微生物学
背景情况:
- 人类T助手17 (TH17) 细胞在自身免疫力中至关重要,但在病原体诱导的分化和功能方面了解甚少.
- 现有的研究主要依赖于小鼠模型,限制了对人类TH17细胞反应的洞察力.
研究的目的:
- 定义由特定病原体诱导的人类TH17细胞的分化要求和效应器功能.
- 研究像IL-1β,IL-2,IL-6,IL-12,IL-23和IFN-γ这样的细胞因子在人类TH17细胞反应中的作用.
主要方法:
- 结合了原始T细胞的体外原始化和记忆T细胞的体外分析.
- 研究了TH17细胞对Candida albicans和金黄色葡萄球菌的反应.
- 利用细胞因子阻断和再刺激试验来分析效应器功能和分化途径.
主要成果:
- 确定了两个不同的人类TH17细胞子集:C. albicans特异性细胞产生IL-17和IFN-γ,而S. aureus特异性细胞在再刺激时产生IL-17和IL-10.
- IL-1β对于C. albicans诱导的TH17分化至关重要,抵消IL-12并促进IL-17/IFN-γ的共产.
- 在TH17细胞中,IL-1β抑制了IL-10的产生,在体内阻断增加了IL-10的输出.
- 再刺激通过IL-2/STAT5信号和ROR-γt降低调节,暂时降低了IL-17的产生.
结论:
- 不同的人类TH17细胞效应因子 (IFN-γ产生与IL-10产生) 的特征是由不同的病原体引起的.
- IL-1β和IL-2充当关键调节剂,影响人类TH17细胞反应的原始化和效应阶段.
- 这些发现突显了人类TH17细胞免疫和潜在的治疗点的复杂性和上下文依赖性.
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