硫化基氧降解酶通过调节线粒体功能障碍来缓解急性性结肠炎
Hailin Ma1, Shuilian Fu1, Chujun Huang1
1The State Key Laboratory of Pharmaceutical Biotechnology, College of Life Sciences Nanjing University Nanjing PR China.
MedComm
|July 15, 2025
概括
硫化氨酸氧降解酶 (SQOR) 通过维持线粒体健康来保护肠道上皮细胞. 由于增加氧化应激和屏障功能障碍,SQOR的损失会使结肠炎恶化,突出显示其在性结肠炎中的保护作用.
科学领域:
- 线粒体生物学 线粒体生物学
- 胃肠病学 胃肠病学
- 细胞的新陈代谢
背景情况:
- 线粒体功能障碍与炎症性肠病 (IBD) 的进展有关.
- 硫化基氧降解酶 (SQOR) 是线粒体硫化物代谢中的一个关键酶.
- 在大肠炎模型中观察到SQOR下调.
研究的目的:
- 调查SQOR在结肠炎期间肠上皮细胞中的作用.
- 阐明SQOR缺乏影响线粒体功能和上皮质屏障完整性的机制.
- 探索SQOR作为性结肠炎 (UC) 的治疗标的潜力.
主要方法:
- 产生肠上皮细胞特异性SQOR淘汰赛 (Sqor CKO) 的小鼠.
- 在野生型和Sqor CKO小鼠中使用德克斯硫酸盐 (DSS) 诱导的急性性结肠炎.
- 分析了线粒体形态,功能,表皮屏障完整性和氧化应激标志物 (例如MDA,ROS).
- 评估了ROS食尸体 (NAC) 对结肠炎严重性的影响.
主要成果:
- 斯科尔CKO小鼠对DSS诱导的大肠炎的敏感性增加,硫化 (H2S) 含量降低.
- 由于SQOR缺陷导致了通过紧结蛋白破坏来破坏表皮屏障.
- 在Sqor CKO小鼠中观察到线粒体损伤,脂质过氧化增加,甲酸 (MDA) 和铁.
- SQOR调节线粒体动力学和反应性氧物种 (ROS) 水平.
- 在DSS治疗的Sqor CKO小鼠中,NAC治疗改善了结肠炎症状.
结论:
- 在大肠炎期间,SQOR在肠上皮细胞中起着关键的保护作用.
- 通过调节ROS和预防铁亡,SQOR维持了线粒体平衡.
- 准SQOR可能为性结肠炎提供一种新的治疗策略.
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