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德克斯硫酸盐诱导的大肠炎和饮食诱导的肝病变在小鼠中的病理生理相互作用
Kinuko Uno1, Keita Sekiguchi2, Noriko Suzuki-Kemuriyama2
1Laboratory of Animal Physiology and Functional Anatomy, Graduate School of Agriculture, Kyoto University.
The Journal of toxicological sciences
|July 2, 2025
概括
非酒精性脂肪性肝病 (NAFLD) 和大肠炎相互作用,饮食诱导的NAFLD病变因酸 (DSS) 诱导的大肠炎的炎症而恶化. 肝损伤也会使结肠炎恶化,突出显示疾病进展中的肠肝轴.
科学领域:
- 胃肠病学和肝病学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 非酒精性脂肪肝 (NAFLD) 是一种普遍存在的与生活方式相关的疾病.
- 肠肝轴在NAFLD病原发生过程中起着至关重要的作用.
- 肠道屏障功能受损会加剧NAFLD的进展.
研究的目的:
- 为了研究硫酸 (DSS) 诱导的大肠炎和饮食诱导的NAFLD之间的相互作用.
- 在综合疾病模型中阐明肠肝轴背后的分子机制.
主要方法:
- 使用的小鼠模型结合了缺乏胆,L-氨基酸定义,高脂肪饮食 (CDAHFD) 和间歇性DSS管理.
- 分析了大肠和肝脏组织的炎症标志物,基因表达和细胞变化.
- 量化了C-X-C动机化学因子连接体16 (CXCL16) 和托尔类受体4 (TLR4) 的表达.
主要成果:
- DSS诱导的大肠炎表现出显著的肠道炎症.
- CDAHFD诱导的非酒精性脂肪肝炎 (NASH) 类似的肝病变.
- 联合DSS和CDAHFD治疗可提高肝脏和肠道炎症和纤维化相关基因的调节.
- TLR4和CXCL16与大肠炎加剧NAFLD有关,反之亦然.
结论:
- DSS诱导的大肠炎和CDAHFD诱导的NASH通过肠肝轴呈现双向恶化.
- TLR4和CXCL16是结肠炎和NAFLD之间相互作用的关键媒介.
- 这种结合的小鼠模型对于研究NAFLD早期肠肝轴损伤非常有价值.
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