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Updated: Jan 10, 2026

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Expansion of Human Peripheral Blood γδ T Cells using Zoledronate
Published on: September 9, 2011
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由细菌对人类Vγ9Vδ2 γδ T 细胞的不依赖布罗菲林3A/2A1的激活
Daniel Gombert1, Jara Simeonov1, Katharina Klein1
1Institute of Immunology, Christian-Albrechts-University and University Hospital Schleswig-Holstein Campus Kiel, Kiel 24105, Germany.
PNAS nexus
|November 27, 2025
概括
人类的Vδ2 γδ T细胞通过基因 (pAg) 通过丁基素 (BTN) 分子激活. 然而,细菌激活涉及一个独特的IL-18通路,独立于BTN/TCR,对感染至关重要.
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:
- 人类的Vδ2 γδ T细胞由质抗原 (pAg) 激活,这一过程依赖于诸如BTN3A和BTN2A1.1之类的Butyrophilin (BTN) 分子.
- 细菌病原体,如M.结核病,产生pAg,导致Vδ2 T细胞激活.
- CD137上调是Vδ2T细胞激活的标志物,类似于CD154T细胞上的CD154和调节性T细胞上的CD137.
研究的目的:
- 研究通过pAg和微生物刺激激活Vδ2T细胞的机制.
- 要区分pAg依赖和pAg独立的激活通路.
- 确定参与细菌Vδ2 T细胞激活的关键分子和途径.
主要方法:
- 利用对抗性抗BTN3A/2A1抗体来阻止BTN介导的信号传输.
- 通过测量CD137/CD154上调和细胞内干扰素-γ的评估Vδ2 T细胞激活.
- 采用了抗TCR抗体7A5,Lck抑制剂emodin,抗IL-18抗体和炎症酶抑制剂.
主要成果:
- 反BTN3A/2A1抗体完全阻断了pAg和zoledronate诱导的Vδ2T细胞激活,但仅部分抑制了细菌激活.
- 细菌激活显示了抗TCR和Lck抑制剂的部分抑制,与强烈减少的pAg激活不同.
- IL-18在细菌的BTN/TCR独立Vδ2T细胞激活中发挥了关键作用,由抗IL-18和炎症酶阻断剂的抑制证明.
结论:
- 在细菌感染期间确定了Vδ2 T细胞的BTN/TCR独立激活途径.
- 这种途径依赖于IL-18和炎症酶激活,与pAg驱动的BTN介导途径不同.
- 研究结果表明,这种依赖IL-18的途径对于细菌感染中的Vδ2 T细胞功能至关重要.
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