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胆酸受体FXR促进肠表皮铁和随后的ILC3功能障碍在新生儿死性肠球炎
Yuxin Zhang1, Yuchao Jing2, Juan He3
1Tianjin Institute of Immunology, Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, International Joint Laboratory of Ocular Diseases (Ministry of Education), State Key Laboratory of Experimental Hematology, Tianjin 300070, China.
结核性肠球炎 (NEC) 涉及纤维细胞生长因子19 (FGF19) 和肠细胞中的Farnesoid X受体 (FXR). 向FXR和ferroptosis可以治疗早产婴儿的这种情况.
科学领域:
- 胃肠病学 胃肠病学
- 新生儿科学 新生儿科学
- 免疫学 免疫学 免疫学
背景情况:
- 结核性肠球炎 (NEC) 是早产婴儿的关键胃肠道紧急情况.
- 目前尚不完全了解NEC病原发生的精确机制.
- 纤维细胞生长因子19 (FGF19) 和其受体法尔内索伊德X受体 (FXR) 参与肠道平衡.
研究的目的:
- 调查肠道纤维细胞生长因子19 (FGF19) 和法尔内索伊德X受体 (FXR) 在死亡性肠球炎 (NEC) 中的作用.
- 探索潜在的治疗策略,针对NEC中FXR介导的铁亡途径.
主要方法:
- 对NEC患者的血FGF19度和肠道FXR表达的分析以及一种小鼠NEC模型.
- 研究了肠上皮细胞 (IEC) 中遗传FXR缺陷对NEC发育的影响.
- 在小鼠NEC模型中利用了FXR抗剂,ACSL4抑制剂和铁灭抑制剂.
主要成果:
- 在NEC患者和小鼠模型中,血FGF19度和肠道FXR表达升高.
- 在IEC中,FXR的遗传缺陷导致了NEC的缓解.
- 通过向ACSL4,FXR促进了IEC铁,导致脂质过氧化物释放,并抑制了ILLC3s的IL-22分泌,加剧了NEC.
- 针对FXR,ACSL4或ferroptosis的治疗剂在小鼠中改善了NEC.
- 在NEC患者中升高的脂质过氧化物与FGF19和疾病严重程度相关.
结论:
- 肠道的FXR信号传递和随后的IEC铁是NEC病变发生的关键驱动因素.
- 针对FXR介导的铁亡途径为NEC提供了一个有前途的治疗方法.
- FGF19和脂质过氧化物作为NEC严重程度的潜在生物标志物.
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