印醇-3-酸通过调节TLR4/NF-κB通路来缓解肠道上皮细胞损伤,以改善肠道屏障功能
Ying Chen1, Yu Li2, Xiaojuan Li2
1Department of Gastroenterology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215000, P.R. China.
印醇-3-酸 (IPA) 保护肠道细胞免受脂聚糖 (LPS) 损伤. IPA增强了屏障功能并减少了炎症,这表明它对肠道健康的治疗潜力.
科学领域:
- 胃肠病学 胃肠病学
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 已知Indole-3-propionic acid (IPA) 是Clostridium sporogenes的一种代谢物,可以改善肠道屏障的功能.
- 来自格拉姆阴性细菌的脂多糖 (LPS) 可以诱导肠道上皮细胞损伤并损害屏障完整性.
- 了解IPA对LPS引起的损伤的保护机制对于开发治疗策略至关重要.
研究的目的:
- 为了研究IPA如何缓解LPS诱导的肠上皮细胞损伤.
- 探索IPA增强肠道屏障功能的潜在分子机制.
- 评估IPA作为治疗肠道屏障功能障碍的治疗剂的潜力.
主要方法:
- 在体外实验中使用NCM460人类结肠上皮细胞.
- 细胞活力测定 (细胞计数套件-8) 和亡分析 (流细胞计量).
- 通过跨体电阻 (TEER) 和紧结蛋白表达 (西方斑点,免疫光) 来测量肠道屏障完整性.
- 使用qPCR和基因记者测定,分析促炎性细胞因子释放 (IL-1β,IL-6,TNF-α) 和信号通路 (TLR4/MyD88/NF-κB,TLR4/TRIF/NF-κB).
主要成果:
- LPS治疗显著降低了NCM460细胞活力和诱导的亡.
- IPA治疗有效抑制了LPS诱导的亡,并改善了细胞活力.
- IPA (>0.5 mM) 通过增加TEER和调高紧密结蛋白 (zonula occludens-1, claudin-1, occludin) 来增强肠道屏障功能.
- 在剂量依赖的IPA抑制了促炎性细胞因子 (IL-1β,IL-6,TNF-α) 的释放.
- IPA的保护作用通过调节TLR4信号通路 (TLR4/MyD88/NF-κB和TLR4/TRIF/NF-κB) 来进行调节.
结论:
- IPA可以缓解人类结肠上皮细胞中LPS诱导的炎症损伤.
- IPA通过保持紧密的结合完整性和减少炎症来增强肠道屏障功能.
- IPA代表了一种潜在的治疗方法,用于管理与肠上皮损伤和屏障功能障碍相关的疾病.
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