通过IL-17RA介导的上皮细胞活动防止了对Helicobacter pylori感染的严重炎症反应
Lee C Brackman1,2, Matthew S Jung1,2, Eseoghene I Ogaga1
1Tennessee Valley Healthcare System, Department of Veterans Affairs, Nashville, TN.
胃上皮细胞中的IL-17RA信号保护在Helicobacter pylori感染期间免受严重炎症的影响. 这种信号传递的丧失导致慢性炎症和免疫细胞过度活化.
科学领域:
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
- 微生物学 微生物学
背景情况:
- 杆菌感染会引起胃炎症,增加胃癌的风险.
- 介素-17 (IL-17) 途径,特别是IL-17受体A (IL-17RA),在免疫反应中起作用.
- 在H. pylori感染期间IL-17RA在胃上皮细胞中的特定作用尚未完全理解.
研究的目的:
- 为了研究IL-17RA信号传递在胃上皮细胞中对H. pylori感染的反应中的作用.
- 为了确定表皮IL-17RA缺乏是否会加剧炎症和免疫反应.
主要方法:
- 使用了基因改造小鼠 (Foxa3creIl17rafl/fl) 与上皮特异性的IL-17RA删除 (Il17raΔGI-Epi) 和对照小鼠 (Il17rafl/fl).
- 被H. pylori感染的小鼠和分析的胃炎症,免疫细胞透和基因表达.
- 在胃洗中测量IgA水平,并评估T卵泡辅助/B细胞轴激活.
主要成果:
- 与对照组相比,缺乏上皮IL-17RA (Il17raΔGI-Epi) 的小鼠表现出胃炎症的增加.
- 尽管皮格表达减少,但在胃洗时IgA水平增加,表明增强的T毛囊辅助/B细胞激活.
- 基因表达分析显示,在Il17raΔGI-Epi小鼠中,急性和慢性炎症反应显著增加.
- 在对IL-17的反应中,由纤维细胞衍生的化学基因可能会导致H. pylori诱导的炎症.
结论:
- 皮质IL-17RA信号传递对于防止H.pylori感染的严重炎症至关重要.
- 皮质IL-17RA缺乏导致长期炎症和Th17/T毛囊辅助/B细胞轴的过度活化.
- 纤维细胞可能通过IL-17-介导的化学激素产生,导致H. pylori诱导的炎症.
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