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调控性T细胞特异性淘汰Notch2的长期后果在免疫平衡中
Hui-Ming Fan1, Yue-Long Qiao1, Yan Liu2
1Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, 238 Jie-Fang Road, Wuhan, Hubei 430060, PR China.
International immunopharmacology
|October 18, 2023
概括
在调节性T (Treg) 细胞中淘汰Notch2会损害它们的功能和数量,导致自发炎症. 在Notch2KO小鼠中,这种免疫失衡随着年龄的增长而恶化.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 调节性T (Treg) 细胞对于维持免疫平衡至关重要.
- 诺奇信号通路在免疫细胞的分化和功能中起作用.
- 诺奇2在Treg细胞中的特定作用及其对免疫功能的长期影响仍然不完全理解.
研究的目的:
- 在小鼠模型中研究Notch2淘汰,特别是Treg细胞对免疫功能和自发炎症的长期影响.
- 分析随着时间的推移导致的T细胞子集平衡和细胞因子概况的变化.
主要方法:
- 产生了一种有条件淘汰赛小鼠模型 (Notch2KO),其中Treg细胞中的Notch2被专门删除.
- 肺部,皮肤和肝脏的组织病理学分析 (HE染色) 在多个时间点 (2,6,9,12个月) 进行.
- 免疫细胞种群 (Treg,Th1,Th2,Th17) 和它们相关的转录因子 (Foxp3,T-bet,GATA3,RORγt) 和细胞因子 (IL-10,IFN-γ,IL-4,IL-5,IL-13,IL-17) 通过西式涂抹,流细胞计和ELISA进行了量化.
主要成果:
- 在Treg细胞中的Notch2淘汰会显著降低Treg细胞数量,Foxp3表达和IL-10水平,随着时间的推移逐渐下降.
- 相反,Th1和Th2细胞群,它们的转录因子 (T-bet,GATA3) 和相关的细胞因子 (IFN-γ,IL-4,IL-5,IL-13) 显著升高并随着年龄的增长而增加.
- 在Notch2KO小鼠的肺和皮肤中观察到自发炎症和炎症细胞透,随着年龄的增长而恶化. Th17细胞水平保持不变.
- Th1/Th2和Treg/Th17细胞的平衡被破坏,随着时间的推移显示下降趋势.
结论:
- 在Treg细胞中的Notch2的特定淘汰严重损害Treg细胞数量和功能.
- 这种损伤导致免疫反应的渐进失衡,其特征是Th1/Th2活性增加和自发炎症.
- 这些发现强调了Notch2在维持Treg细胞介导的免疫耐受性和预防与年龄相关的免疫障碍方面的关键作用.
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