铁调节蛋白1和2在细菌炎中调节炎症方面具有相反的作用
Niraj Ghatpande1, Aileen Harrer2, Bar Azoulay-Botzer1
1Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Technion City, Haifa, Israel.
JCI insight
|February 1, 2024
概括
缺铁调节蛋白1 (IRP1) 在急性细菌炎 (AO) 的小鼠模型中减少丸损伤和免疫反应. 删除对尿病原性大肠杆菌 (UPEC) 感染保护的IRP1,表明治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 泌尿器科 泌尿器科 泌尿器科 泌尿器科
- 分子生物学分子生物学
背景情况:
- 急性细菌性耳炎 (AO) 是一种常见的与不孕症相关的阴内炎症.
- 泌尿病原性大肠杆菌 (UPEC) 经常导致AO,利用铁获取系统壮成长.
- 铁调节蛋白 (IRP) 1和2对于铁稳定和免疫功能至关重要,但它们在丸炎症中的具体作用尚不清楚.
研究的目的:
- 研究IRP1和IRP2在宿主对UPEC诱导的炎的反应中的作用.
- 阐明IRP在细菌感染期间影响丸损伤和免疫细胞透的机制.
主要方法:
- 使用了UPEC诱导的耳炎的小鼠模型.
- 在野生型 (WT),Irp1-/-,和Irp2-/-小鼠中比较免疫反应和丸损伤.
- 通过流式细胞计量分析ERK信号通路和免疫细胞群 (单细胞,中性粒细胞,巨细胞).
主要成果:
- 与UPEC感染后的WT小鼠相比,Irp1-/-小鼠的丸损伤减少,免疫反应减弱.
- 缺少IRP1导致ERK信号受损和抗炎F4/80+CD206+巨细胞显著增加.
- 相反,IRP2删除导致炎症反应加剧.
- 与WT和Irp2-/-小鼠不同,Irp1-/-小鼠的单细胞和中性粒细胞没有增加.
结论:
- 通过调节ERK信号传递和抑制炎症性免疫反应,IRP1的删除可以防止UPEC诱导的耳炎.
- 在细菌感染期间,IRP1在调解丸炎症和免疫细胞招募方面发挥着重要作用.
- 向IRP1可能为治疗急性细菌耳和相关不孕症提供一种新的治疗策略.
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