肠上皮质AhR删除通过脂质和氨基酸代谢重编程加剧DSS诱导的大肠炎:综合代谢-转录组证据
Yuanling Zhang1, Fengda Liu2, Chao Xu1
1Department of General Surgery, Chongqing General Hospital, Chongqing University, Chongqing, China.
概括
阿里碳水化合物受体 (AhR) 信号影响炎症性肠病 (IBD) 通过调节肠上皮细胞代谢. 在肠道细胞中删除AhR会破坏脂质和氨基酸代谢,在IBD模型中恶化炎症和屏障功能障碍.
科学领域:
- 胃肠病学 胃肠病学
- 免疫学 免疫学 免疫学
- 代谢学 代谢学 代谢学
背景情况:
- 亚利碳化合物受体 (AhR) 信号影响代谢平衡,其在炎症性肠病 (IBD) 中的作用越来越被认可.
- 抑制AhR信号可能会使IBD症状恶化,并损害肠上皮质屏障功能.
- 通过表皮细胞代谢,AhR信号影响肠道屏障功能的确切机制尚不清楚.
研究的目的:
- 专门研究在肠道上皮细胞中删除AhR的代谢和基因组后果.
- 在炎症的背景下阐明AhR在调节肠上皮细胞代谢和屏障功能的作用.
主要方法:
- 肠上皮特异性的AhR淘汰小鼠 (AhRΔIEC) 的构建.
- 对野生型 (WT),DSS诱导的大肠炎 (DSS),AhRΔIEC和AhRΔIEC+DSS小鼠进行了全面的代谢和转录组分析.
- 代谢物和差异表达基因之间的相关性分析.
主要成果:
- 肠上皮细胞的AhR淘汰导致脂质和氨基酸代谢发生显著改变,影响69种代谢物和64种基因.
- 与WT小鼠相比,DSS诱导的炎症引起了94种代谢物和3062个基因的广泛变化.
- 在AhRΔIEC+DSS小鼠中,促炎代谢物增加,而抗炎代谢物减少,与像Saa1和Saa3.3这样的炎症因素的改变表达相关.
结论:
- 通过细胞代谢的调节,AhR信号在维持肠上皮质屏障功能方面发挥着至关重要的作用.
- 在这项研究中发现的代谢失调途径为了解IBD中AhR的保护机制提供了新的目标.
- 这项研究为AhR如何在IBD发育过程中调节肠上皮细胞代谢提供了新的见解.
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