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阿司匹林通过FXR和ET-1信号通路引起肠道损伤
Qiuxia Lin1,2, Binbin Zhang1,2, Manyun Dai2
1Laboratory of Hepatointestinal Diseases and Metabolism, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China.
长期使用阿司匹林会通过改变胆酸和激活内甲蛋白-1 (ET-1) 来引起胃肠道损伤. 激活Farnesoid X受体 (FXR) 和抑制ET-1可以缓解这些损伤.
科学领域:
- 胃肠病学 胃肠病学
- 分子生物学分子生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 阿司匹林 (乙盐酸) 是一种广泛使用的非类固醇抗炎药物 (NSAID).
- 长期或高剂量的阿司匹林使用与显著的胃肠道不良反应有关,包括肠道损伤.
- 阿司匹林诱导的肠损伤背后的精确分子机制需要进一步阐明.
研究的目的:
- 研究阿司匹林诱导的急性和慢性肠道损伤的分子机制.
- 探索Farnesoid X受体 (FXR) 和内甲素-1 (ET-1) 途径在阿司匹林诱导的胃肠道损伤中的作用.
- 确定潜在的治疗策略来缓解阿司匹林诱导的肠道损伤.
主要方法:
- 使用非向代谢学来分析十二指肠中的代谢变化.
- 实验使用了Farnesoid X受体 (FXR) 淘汰小鼠和野生类型的 littermates.
- 施用了Farnesoid X受体 (FXR) 激动剂 (obeticholic 酸和 chenodeoxycholic 酸) 和一种内甲素生成抑制剂 (estradiol).
- 评估了关键的分子通路,包括FXR标基因和内甲素-1 (ET-1) 表达.
主要成果:
- 阿司匹林暴露改变了十二指肠中的胆酸概况 (taurocholate酸和tauro-β-muricholic酸),并抑制了FXR标基因表达.
- 施用FXR激动剂 (OCA和CDCA) 改善了十二指腺损伤和炎症.
- 阿司匹林诱导的内甲素-1 (ET-1) 过度表达在淘汰赛小鼠中独立于FXR,但在野生型小鼠中可以通过CDCA以FXR依赖的方式恢复.
- 抑制ET-1的产生显示出对小肠损伤的保护作用.
结论:
- 华氏体X受体 (FXR) 和内甲素-1 (ET-1) 途径在急性和慢性阿司匹林诱导的肠道损伤中起着关键作用.
- 激活FXR和抑制ET-1过度表达代表了减轻阿司匹林诱导的胃肠道损伤的有希望的治疗策略.
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