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由m6A修饰诱导的下调KLF4,在炎症性肠病中加剧肠道屏障功能障碍
Xingchao Zhu1,2,3, Jiayu Wang1,2,3, Huan Zhang1,3
1Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, 178 East Ganjiang Road, Suzhou, 215000, China.
Cellular and molecular life sciences : CMLS
|November 29, 2024
概括
克鲁佩尔样因子4 (KLF4) 在炎症性肠病 (IBD) 中降低,恶化肠上皮屏障 (IEB) 损伤. 向KLF4显示出通过恢复IEB功能来治疗IBD的前景.
科学领域:
- 胃肠病学 胃肠病学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 克鲁佩尔样因子4 (KLF4) 是一种转录因子,具有多种生物作用.
- 它在炎症性肠病 (IBD) 期间调节肠上皮屏障 (IEB) 的特定功能仍未得到充分研究.
研究的目的:
- 研究KLF4在维持炎症性肠病 (IBD) 中肠上皮屏障 (IEB) 完整性的作用.
- 阐明 KLF4 影响 IEB 功能和结肠炎病理学的潜在机制.
- 探索KLF4作为IBD的潜在治疗点.
主要方法:
- 在IBD患者和结肠炎模型中分析KLF4表达,使用生物信息学,免疫组织化学和西方血清.
- 在小鼠模型 (DSS和TNBS诱导) 中使用shRNA介导的敲除方法在体内验证KLF4在结肠炎中的作用.
- 在体外和体内评估KLF4对跨表皮电阻 (TEER),细胞透性,细胞亡和顶端结合复合体 (AJC) 蛋白质的影响.
- 使用MeRIP和RIP试验,研究m6A修饰对KLF4表达的影响.
主要成果:
- 在IBD患者中,KLF4表达显著降低,与炎症负相关.
- KLF4 缺乏症通过损害 IEB 完整性,增加亡和减少 AJC 蛋白来加剧结肠炎.
- KLF4上调AJC蛋白质,通过降低ROS和促炎细胞因子来抑制细胞灭绝.
- m6A修改 (METTL3/ALKBH5/YTHDF2) 降低了KLF4的表达.
- KLF4诱导剂APTO-253显示与梅萨拉对IEB功能的协同作用.
结论:
- KLF4是肠上皮屏障 (IEB) 完整性的关键调节者.
- KLF4的下调有助于炎症性肠病 (IBD) 的发生.
- 针对KLF4的治疗策略是IBD治疗的有希望的途径.
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