PPAR-γ激动剂减轻肠道屏障功能障碍和炎症诱导的Clostridioides difficileSlpA在体外
Maryam Noori1, Masoumeh Azimirad1, Mahsa Ghorbaninejad2
1Foodborne and Waterborne Diseases Research Center , Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Scientific reports
|December 31, 2024
概括
克洛斯特里迪奥伊德困难SlpA蛋白质通过减少PPAR-γ触发炎症并破坏肠道屏障. 通过pioglitazone激活PPAR-γ可以逆转这些有害影响,从而提供了一个潜在的治疗策略.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 困难菌感染 (CDI) 导致与医疗保健相关的严重腹.
- 来自C. difficile的表面层蛋白A (SlpA) 对于细菌殖民和宿主炎症至关重要.
- 过氧体增殖器激活受体玛 (PPAR-γ) 在维护肠道完整性和减少炎症方面发挥着作用.
研究的目的:
- 研究PPAR-γ在C. difficileSlpA引起的炎症中的作用.
- 确定SlpA如何影响紧结蛋白和炎症标记物.
- 评估PPAR-γ激动剂对SlpA介导作用的治疗潜力.
主要方法:
- 从有毒性和无毒性C. difficile菌株中提取了SlpA.
- 使用RT-qPCR分析了紧结蛋白和炎症标记物的基因表达.
- 用ELISA和Griss反应测量了细胞因子的产生和氧化水平.
- 西方血栓评估了PPAR-γ水平,有或没有pioglitazone治疗.
主要成果:
- C. difficile SlpA上调的炎症标志物 (TLR-4,NF-κB,IL-17,TNF-α) 和下调的紧结蛋白 (JAM-A,克劳丁-1,奥克卢丁).
- 在Caco-2细胞和巨细胞中,SlpA降低了PPAR-γ及其受体 (CD36) 表达.
- 皮奥格利塔 (PPAR-γ 激动剂) 逆转了SlpA诱导的紧接口干扰和减轻了炎症.
结论:
- 艰难的C. SlpA减弱PPAR-γ的表达,破坏肠道屏障,并促进炎症.
- 像pioglitazone这样的激素激活PPAR-γ可以抵消SlpA介导的损害.
- 向PPAR-γ代表了管理C. difficile相关炎症的有希望的治疗途径.
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