LCA和3-oxo-LCA减轻了肠道上皮细胞中饮食氧化醇诱导的屏障功能的丧失
Gayatri Reghu1, Ashna Fathima1, Narendran Swaminathan1
1Cell Signaling Laboratory, Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Medchal District, Telangana 500078, India.
Steroids
|January 30, 2026
概括
饮食中的氧化会通过增加MMP和炎症来损害肠道屏障的完整性. 然而,二次胆汁酸,石化胆汁酸 (LCA) 和3-oxo-LCA,恢复了屏障功能,并减少了氧化醇引起的肠细胞损伤.
科学领域:
- 胃肠病学 胃肠病学
- 细胞生物学 细胞生物学
- 微生物组研究 微生物组研究
背景情况:
- 肠道屏障功能障碍与炎症性肠病 (IBD) 和结直肠癌 (CRC) 有关.
- 饮食中的胆固醇氧化产物 (氧化醇) 有助于肠道屏障损伤和炎症.
- 肠道微生物群的代谢物,包括二次胆酸,可以调节肠道炎症.
研究的目的:
- 研究二次胆汁酸对氧化醇诱导的肠上皮损伤的保护作用.
- 阐明氧化醇损害肠道屏障功能的机制.
主要方法:
- 使用肠道上皮细胞进行体外研究.
- 使用跨皮电阻 (TEER) 和FITC-dextran流量对屏障完整性的评估.
- 测量矩阵金属蛋白酶 (MMP-2,MMP-9),NF-κB激活,以及细胞因子/化学因子的产生.
主要成果:
- 氧化醇通过上调MMP-2和MMP-9的调节,激活NF-κB,并增加促炎细胞因子 (CCL2,CCL5,IL-8) 来诱导肠道屏障损伤.
- 石墨烯酸 (LCA) 和脱水石墨烯酸 (3-oxo-LCA) 有效地抵消了氧醇诱导的屏障功能障碍.
- 二次胆汁酸降低了氧化醇诱导的MMP表达和炎症媒介释放.
结论:
- 二次胆汁酸,LCA和3-oxo-LCA,保护肠道上皮细胞免受氧诱导的屏障损伤.
- 这些胆汁酸可以通过抑制MMP和NF-κB信号通路来减轻炎症.
- 研究结果表明,二次胆汁酸在控制肠道炎症和屏障缺陷方面具有潜在的治疗作用.
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