训练有素的ILC3反应促进了肠道的防御
Nicolas Serafini1, Angélique Jarade1, Laura Surace1
1Institut Pasteur, Université de Paris, Inserm U1223, Innate Immunity Unit, Paris, France.
概括
在感染后,第3组先天性淋巴细胞 (ILC3) 形成持久记忆. 这些训练有素的ILC3可增强对未来病原体挑战的免疫保护.
科学领域:
- 免疫学
- 天生的免疫力
- 细胞免疫学
背景情况:
- 3组先天性淋巴细胞 (ILC3) 是参与宿主防御的关键先天性免疫细胞,特别是在粘膜表面.
- 在暴露于病原体后,ILC3s的长期功能可塑性在很大程度上仍未被描述.
研究的目的:
- 调查肠道ILC3在与肠道细菌病原体接触后是否发生稳定的功能变化.
- 确定这些修改后的ILC3是否在随后的病原体挑战时表现出增强的反应.
主要方法:
- 用肠道细菌 *Citrobacter rodentium* 挑战小鼠,诱导受时间限制的感染.
- 在感染后的长时间内,分析了肠道ILC3群体的表型和功能变化.
- 进行了挑战性实验,以评估先前暴露的ILC3s与原始ILC3s的反应.
主要成果:
- 在 *C. rodentium* 感染后,肠道ILC3细胞在几个月内保持活化状态.
- 在重新测试时,这些"受过训练"的ILC3s表现出增加的增殖和增强的IL-22产生.
- 与原始ILC3相比,受过训练的ILC3表现出更强的感染控制能力,与代谢和增殖能力的增强有关.
结论:
- 对*Citrobacter rodentium*的有限暴露会诱导肠道ILC3的持久表型和功能性适应.
- 这些ILC3s的适应性变化有助于增强长期的粘膜免疫和宿主防御.
- 这项研究揭示了由ILC3s介导的先天免疫系统中的一种免疫记忆形式.
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