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在细菌感染和喘的小鼠模型中,感觉神经元调节刺激依赖的幽默免疫
Diane Aguilar1,2, Fengli Zhu1,2, Antoine Millet1,2
1Division of Respiratory and Critical Care Medicine and Physiology, Harbor-UCLA Medical Center, Torrance, CA, USA.
Nature communications
|October 16, 2024
概括
感官神经元对于免疫反应至关重要,在细菌感染和喘期间指导B细胞活动和抗体产生. 它们释放特定的神经,如VIP和P物质,以调节这些过程.
科学领域:
- 免疫学 免疫学 免疫学
- 神经科学是一个神经科学.
背景情况:
- 众所周知,感官神经元在检测病原体时会启动先天免疫反应.
- 它们在适应性幽默免疫中的特定作用,特别是B细胞调节和抗体产生,仍然在很大程度上未被探索.
研究的目的:
- 为了研究感觉神经元在B细胞招募和抗体生产中的作用,在细菌感染和过敏呼吸道炎症期间.
- 阐明感官神经元影响幽默免疫力的机制.
主要方法:
- 用于Streptococcus pneumoniae感染和Alternaria alternata诱导的喘的小鼠模型.
- 采用了感官神经元耗尽技术.
- 测量了细菌负担,B细胞种群,免疫球蛋白 (IgG,IgE) 水平,中性粒细胞刺激和喘特征.
- 研究了神经血管活性肠道多 (VIP) 和P物质及其受体 (VIPR1) 的作用.
主要成果:
- 在S. pneumoniae感染中,感觉神经元耗尽导致细菌负荷增加,B细胞数量减少,IgG水平降低,中性粒细胞刺激减少.
- 在A. alternata诱导的喘中,感觉神经元枯竭导致B细胞数量减少,IgE减少,喘症状减弱.
- 在机械上,感觉神经元在细菌感染期间释放VIP,在喘期间释放P物质.
- 服用VIP降低了细菌负担,而VIPR1缺乏会加剧感染.
- 外源物质P使喘恶化,而物质P缺乏改善了喘.
结论:
- 感觉神经元在编排B细胞反应和在细菌感染和过敏呼吸道炎症中产生抗体方面发挥着至关重要的作用.
- 感觉神经元释放的特定神经 (细菌感染的VIP,喘的物质P) 决定了免疫结果.
- 这些发现揭示了神经系统和免疫系统在调节 humoral 免疫力之间存在直接联系.
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