严重的肠粘膜损伤会导致严重的全身炎症和脏相关的淋巴细胞器官反应
Xiao Wang1, Chao Du2, Saravanan Subramanian1
1Pediatric Mucosal Inflammation and Regeneration Research Program, Center for Pediatric Translational Research and Education, Department of Pediatrics, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States.
Frontiers in immunology
|January 23, 2024
概括
在小鼠中,德克斯硫酸 (DSS) 诱导的严重肠道损伤导致全身炎症,器官损伤和脏功能障碍. 这种模型有助于研究肠道衍生的炎症和免疫反应.
科学领域:
- 胃肠病学 胃肠病学
- 免疫学 免疫学 免疫学
- 病理学 病理学 病理学
背景情况:
- 临床数据将肠道问题与全身炎症联系起来,但动物模型和机制仍然不清楚.
- 现有的模型无法完全复制肠道损伤的进展和随后的系统性影响.
研究的目的:
- 用Dextran硫酸盐 (DSS) 诱导的小鼠模型研究肠道损伤和全身炎症之间的联系.
- 阐明导致肠道系统性炎症的机制及其对免疫器官的影响.
主要方法:
- 成年小鼠在饮用水中获得4%的DSS,以诱导结肠粘膜损伤.
- 用RNAscopein situ杂交和组织学分析来评估细菌转位和器官炎症.
- 分析了周围血液,肝脏和脏组织的炎症标志物,酶水平,细胞亡和免疫细胞表达.
主要成果:
- DSS治疗导致高死亡率,严重的肠道损伤和外围炎症.
- 观察到细菌转移到更深的结肠组织,以及肝脏和肺部的炎症.
- 发现肝酶 (ALT,AST) 的升高,促炎性细胞因子,脏亡的增加和CD45表达的减少.
结论:
- 高剂量的DSS诱导的肠道损伤引发了与多器官损伤的败血症类系统性炎症.
- 脏在肠道衍生系统性炎症中发挥着关键作用,显示出细胞亡和CD45+细胞功能障碍.
- 这种严重的结肠损伤模型对于研究肠道损伤和全身免疫反应非常有价值.
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