在早期感染了 Echinococcus multilocularis 的小鼠中,LAG3 通过 CD4+ T 细胞抑制了抗寄生虫反应
Abidan Ainiwaer1,2, Dewei Li3, Wenge Liu1
1Basic Medical College, Xinjiang Medical University, Urumqi, Xinjiang, China.
Parasites & vectors
|February 12, 2026
概括
淋巴细胞激活基因-3 (LAG3) 在早期 Echinococcus multilocularis 感染期间限制了抗寄生虫 CD4+ T 细胞反应. 向LAG3可能为气泡内角球菌 (AE) 提供治疗策略,但需要谨慎的时间来避免恶化肝损伤.
科学领域:
- 免疫学 免疫学 免疫学
- 寄生虫学的寄生虫学
- 类动物学 类动物学
背景情况:
- 免疫检查点如淋巴细胞激活基因-3 (LAG3) 在慢性感染中至关重要,但它们在早期寄生虫阶段的作用尚不清楚.
- 由 Echinococcus multilocularis 引起的状状 (AE) 是一种致命的寄生虫感染,在这种情况下,免疫反应至关重要.
- 本研究研究了E. multilocularis感染早期阶段CD4+T细胞免疫中LAG3的特定阶段功能.
研究的目的:
- 为了阐明LAG3在CD4+T细胞介导免疫中在E. multilocularis感染初期的调节功能.
- 确定LAG3缺乏对T细胞反应和寄生虫负担的影响在AE的小鼠模型中.
- 评估针对LAG3作为AE治疗策略的潜力.
主要方法:
- 使用了一种E. multilocularis感染的小鼠模型.
- 采用流式细胞计量来分析CD4+T细胞子集中的LAG3表达和细胞因子产生.
- 通过使用LAG3-淘汰赛小鼠,采用T细胞移植和抗LAG3抗体治疗,研究了体内功能.
- 评估寄生虫负担和肝脏病理.
主要成果:
- 在早期感染中,LAG3在肝脏CD4+效应T细胞 (CD4+Teff),特别是CD69+亚群上表达高.
- 表达LAG3的CD4+ T细胞产生高水平的IL-4和IL-10.
- 缺少LAG3增强了脏CD4+T细胞的IFN-γ,IL-4和IL-10的产生,与寄生虫生长的减少相关.
- 采用LAG3-/- CD4+ T细胞的转移导致了增加分化为Teff细胞和更高的IFN-γ/IL-10生产.
- 抗LAG3抗体治疗显示,对降低寄生虫负担的趋势不显著,但肝炎和纤维化恶化.
结论:
- 在早期的E. multilocularis感染中,LAG3充当免疫检查点,抑制抗寄生虫CD4+T细胞反应.
- 针对LAG3可能是AE的潜在治疗策略,但需要精确的,特定阶段的干预.
- 为了有效治疗AE,平衡寄生虫清除与缓解纤维化和组织损伤至关重要.
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