乳腺细胞MrgprB2在IgE介导的气道炎症中的神经免疫相互作用中,并通过β-arrestin2进行其调节
Sangita Sutradhar1, Hydar Ali1
1Department of Basic and Translational Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States.
Frontiers in immunology
|November 1, 2024
概括
物质P (SP) 通过MrgprB2激活巨细胞 (MCs),导致过敏气道炎症 (AAI). β-arrestin2 (β-arr2) 调节这种神经免疫相互作用,影响AAI中的MC招募和激活.
科学领域:
- 神经免疫学 神经免疫学
- 过敏性炎症 过敏性炎症
- 细胞信号传输 细胞信号传输
背景情况:
- 过敏性喘包括由物质P (SP) 激活乳腺细胞 (MC).
- 这种神经免疫相互作用的确切机制,特别是在过敏呼吸道炎症 (AAI) 中,仍然不清楚.
- 以前的研究表明β-arrestin2 (β-arr2) 通过Mas相关的G蛋白结合受体B2 (MrgprB2) 参与MC化学反应.
研究的目的:
- 调查MrgprB2是否调解IgE-FcεRI诱导的AAI中的神经免疫相互作用.
- 确定β-arr2在调节SP-MrgprB2介导的AAI中的作用.
- 为了阐明这种途径对呼吸道炎症和杯状细胞增生的贡献.
主要方法:
- 使用了野生类型,MrgprB2淘汰和MC特定的β-arr2淘汰小鼠.
- 通过抗TNP-IgE诱导的被动敏感化,其次是抗原挑战.
- 评估了SP生成,MC招募,细胞因子表达 (RT-PCR,ELISA),炎症细胞透 (免疫光学,流动细胞测量) 和杯状细胞增生 (PAS染色).
主要成果:
- 在挑战后的野生型小鼠中,SP生成,MC招募和Tac1,MrgprB2,TNF-α和Th2细胞因子的表达被上调.
- 在野生类型的小鼠中观察到TNF-α,Th2细胞因子,乙酸/中性酸透和杯状细胞增生的增加.
- 这些过敏反应在MrgprB2和MC特异性β-arr2淘汰赛小鼠中显著减弱.
结论:
- 在小鼠中,SP介导的MrgprB2激活是过敏气道炎症和杯状细胞增生的一个关键因素.
- β-arrestin2 (β-arr2) 在这个神经免疫轴中起着关键的调节作用.
- β-arr2促进MC的招募和随后通过FcεRI的激活,从而加剧了AAI.
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