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托尔类受体9信号缺陷与发展后感染性易怒肠综合征之间的关联
Satoshi Kotani1, Yoshiyuki Mishima2, Kenichi Kishimoto1
1Department of Gastroenterology, Faculty of Medicine, Shimane University, Izumo, Japan.
收费类受体9 (TLR9) 缺陷通过上调布拉迪基宁受体,加剧后感染性易怒肠综合征 (PI-IBS) 的内脏疼痛. 阻断这些受体可以缓解疼痛,这表明PI-IBS的新治疗方法.
科学领域:
- 胃肠病学 胃肠病学
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
背景情况:
- 后感染性刺激性肠综合征 (PI-IBS) 是肠道感染后的一种功能性胃肠疾病.
- 包括收费类受体9 (TLR9) 在内的遗传变异与PI-IBS有关,但其作用尚未完全理解.
研究的目的:
- 研究TLR9在PI-IBS发展中的特定作用.
- 探索潜在的机制,包括内脏敏感性,炎症,肠道微生物群和基因表达.
主要方法:
- 向野生型 (WT) 和TLR9淘汰赛 (KO) 类小鼠使用Citrobacter rodentium.
- 感染后六周通过巴洛斯塔特基结直肠膨胀评估内脏敏感性.
- 评估了组织学炎症,肠道透性,肠道微生物群组成和结肠基因表达 (BDKRB1,BDKRB2).
主要成果:
- 与WT小鼠不同的是,TLR9 KO小鼠表现出显著的内脏过敏症,尽管只有轻度的急性结肠炎,没有持续的炎症或超透性.
- 肠道失生症部分导致PI-IBS的发展,如微生物群分析和便微生物群转移所示.
- TLR9缺乏导致结肠表皮中的布拉迪基宁B1和B2受体 (BDKRB1,BDKRB2) 的显著更高的表达.
- 使用BDKRB1和BDKRB2抗体 (R715,HOE 140) 在感染TLR9KO小鼠中显著降低了内脏过敏症.
结论:
- 在传染性大肠炎后,TLR9缺乏促进PI-IBS通过调高结肠布拉迪基宁受体来促进PI-IBS.
- 布拉迪基宁受体抗剂有效缓解内脏疼痛,为PI-IBS提供了潜在的新疗法策略.
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