药理上激活HNF4α/γ 恢复皮质屏障功能在克罗恩氏病
bioRxiv : the preprint server for biology
|November 24, 2025
概括
肝细胞核因子HNF4α/γ调节克罗恩病 (CD) 中的肠道屏障完整性. 这些因素的丧失会损害屏障功能,但植物衍生激动剂 (NCT和NFT) 可以恢复它,为CD提供潜在的治疗方法.
科学领域:
- 胃肠病学和肝病学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 肠道透性屏障功能障碍是克罗恩病 (CD) 的一个关键特征,在炎症之前和预测复发.
- 目前的治疗策略并没有直接解决CD中的上皮屏障恢复问题.
- 肝细胞核因子 (HNF4α和HNF4γ) 在调节紧结 (TJ) 组织和屏障完整性方面的作用受到研究.
研究的目的:
- 阐明HNF4α/γ在TJ调节和CD病变发生过程中的作用.
- 确定HNF4的药理激活是否可以恢复CD中的上皮屏障功能.
主要方法:
- 来自HNF4α/γ双淘汰赛 (DKO) 小鼠的综合转录基因数据与基因和炎症小鼠模型,人类CD组织和患者衍生器官 (PDO) 的功能分析.
- 通过使用FITC-dextran流量和体电阻 (TEER) 评估屏障功能.
- 测试了两个植物衍生的HNF4激动剂,NCT和NFT,用于治疗潜力.
主要成果:
- 通过改变TJ基因表达,包括TJ基因的抑制和CLDN2的诱导,HNF4α/γ的联合损失损害了屏障功能.
- 在CD肠道表皮和PDO中观察到HNF4α/γ下调,表明表皮内在缺陷.
- 慢性TNF过度表达模仿了屏障缺陷,但HNF4α/γ损失与炎症无关.
- NCT和NFT治疗恢复了HNF4α/γ表达,使TJ基因配置文件正常化,并改善了CD PDO和有机体中的TEER.
结论:
- HNF4α/γ是表皮TJ完整性的关键调节者,它们的丧失会导致CD中的炎症独立屏障缺陷.
- 慢性炎症可以加剧,但不会启动这种内在的上皮功能障碍.
- 使用NCT和NFT对HNF4α/γ进行药理活性化代表了对CD的新,障碍愈合治疗方法.
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