坦格雷丁通过改善BMAL1介导的肠壁功能来缓解性结肠炎.
Jiaxian Weng1, Zicong Wu2, Yuwei Huang2
1Institute of Molecular Rhythm and Metabolism, Guangzhou University of Chinese Medicine, Guangzhou, China; Chinese Medicine Guangdong Laboratory, Zhuhai, China.
坦格雷丁 (TAN) 通过恢复肠道昼夜时钟并增强BMAL1表达,有效治疗性结肠炎 (UC). 这种黄类化合物减少炎症并改善肠道屏障功能,为UC管理提供了新的治疗途径.
科学领域:
- 时间生物学 时间生物学
- 胃肠病学 胃肠病学
- 药理学 药理学是指药理学的学科.
背景情况:
- 性结肠炎 (UC) 是一种慢性炎症性肠病,与昼夜节律障碍有关.
- 坦格雷丁 (TAN) 是一种天然的黄类化合物,具有抗炎性质,但其通过昼夜时钟调节在UC中的疗效和机制尚不清楚.
研究的目的:
- 调查TAN对UC的治疗作用,并阐明其涉及肠道昼夜时钟调节的机制.
- 评估TAN对大肠炎严重程度,节律性,时钟基因表达,炎性细胞因子和紧密结合蛋白的影响.
主要方法:
- 一种硫酸德克斯 (DSS) 诱导的小鼠结肠炎模型被用于评估预防性TAN给药.
- 分析了肠道昼夜钟基因振荡,炎症标记物和紧密结合蛋白.
- 用MODE-K细胞和肠特异性Bmal1淘汰 (Bmal1iKO) 鼠标进行的体外研究证实了BMAL1.1的作用.
主要成果:
- TAN的使用显著缓解了结肠炎的严重程度,并恢复了运动节奏.
- 在结肠钟基因 (Bmal1,Per1/2,Cry1/2,Dbp,Rev-erbα,Rorα),细胞因子 (Il-6,Il-1β) 和紧密结合蛋白 (ZO-1,Occludin) 中,TAN逆转了UC诱导的破坏.
- TAN增强了BMAL1的表达和节律性,这对其治疗效果至关重要,正如在Bmal1iKO小鼠和体外模型中证实的那样. 观察到长时间治疗疗效,在ZT2.2时获得最佳结果.
结论:
- 坦格雷丁通过上调BMAL1依赖性炎症抑制和增强肠道屏障完整性来改善性结肠炎.
- 循环时钟调制是UC管理的一个有前途的策略.
- 该研究为优化临床环境中TAN定时剂量方案提供了机制基础.
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