内源性葡萄糖样-1受体和依赖葡萄糖的胰岛素型多受体信号传递抑制了空气过敏原诱导的天生的气道炎症
Shinji Toki1, Masako Abney1, Jian Zhang1
1Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA.
Allergy
|November 19, 2024
概括
通过葡萄糖样-1受体 (GLP-1R) 和依赖葡萄糖的胰岛素型多受体 (GIPR) 途径的联合信号传递对于调节过敏呼吸道炎症至关重要. 它们的缺乏会加剧过敏原诱导的免疫反应,这表明喘的治疗潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 内分泌学 在内分泌学.
- 呼吸系统医学 呼吸系统医学
背景情况:
- 通过GLP-1R和GIPR传递因克雷丁信号已在小鼠中表现出抗炎作用.
- 以前的研究表明,个体受体信号可能会减少过敏呼吸道炎症.
- 这项研究研究了GLP-1R和GIPR对过敏气道炎症信号的联合和单独影响.
研究的目的:
- 为了确定GLP-1R和GIPR信号是否单独降低过敏气道炎症.
- 评估是否结合GLP-1R和GIPR信号增强抑制过敏原诱导的肺和呼吸道炎症.
- 评估这些受体在由第2组先天性淋巴细胞 (ILC2) 驱动的先天性免疫反应中的作用.
主要方法:
- 使用了野生型 (WT),GLP-1R淘汰赛 (KO),GIPRKO和GLP-1R/GIPR双淘汰赛 (DKO) 的小鼠.
- 试验小鼠在鼻腔内使用 Alternaria alternata 提取物 (Alt-Ext) 或载体.
- 分析了炎症标志物,细胞因子释放 (IL-33,TSLP),免疫细胞透 (乙酸性细胞,淋巴细胞,中性细胞) 和ILC2激活 (GATA3+).
主要成果:
- 虽然IL-33的释放类似,但TSLP水平在Alt-Ext挑战后的DKO小鼠中显著升高.
- 在DKO小鼠中,肺同质体中IL-5,IL-13,CCL11和CCL24的蛋白质表达增加.
- 在BALF中,Alt-Ext挑战导致了更高的乙氨基,淋巴细胞和中性细胞数量,并在DKO小鼠中增加了GATA3+ ILC2s.
- 在DKO小鼠中观察到肺上皮细胞上ICAM-1表达的增加.
结论:
- GLP-1R和GIPR信号的双重缺陷放大了TSLP释放和ILC2驱动的2型免疫反应对空气过敏原.
- 这些发现凸显了结合性隐素受体信号传导在缓解过敏气道炎症方面的关键作用.
- 结合GLP-1R和GIPR的信号传输代表了喘治疗的潜在治疗标.
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