在OGT-TFF2轴中介于肝脏内交叉和MASH病原性
Lei Zhang1, Cuijuan Han2, Man Mohan Shrestha1
1Department of Comparative Medicine, Yale University School of Medicine, New Haven, Connecticut, USA.
Hepatology (Baltimore, Md.)
|June 30, 2025
概括
一种新型的O-GlcNAc转移酶 (OGT) 和三叶草因子2 (TFF2) 途径通过促进免疫细胞交叉交互来驱动代谢功能障碍相关的脂肪肝炎 (MASH). 在肝细胞中抑制TFF2可以治疗MASH的进展.
科学领域:
- 肝病学和免疫学 肝病学和免疫学
- 肝病的分子机制 肝病的分子机制
背景情况:
- 代谢功能障碍相关的脂肪肝疾病 (MASLD) 的进展涉及复杂的细胞-细胞通信.
- 了解肝细胞和免疫细胞之间的相互作用对于MASH的发病过程至关重要.
研究的目的:
- 在MASH中识别调节细胞间交叉通话的新型膜因子.
- 研究O-GlcNAc转移酶 (OGT) 在MASH发育中的作用.
- 探索针对已识别的途径的治疗潜力.
主要方法:
- 对人类和老鼠肝脏中OGT和三叶子因子2 (TFF2) 表达的分析.
- 利用3D小鼠肝脏球形模型来评估TFF2对炎症和纤维生成的影响.
- 在饮食诱导的MASH小鼠模型中使用了针对TFF2的GalNAc修饰siRNA.
主要成果:
- 降低OGT促进TFF2分泌,加剧了肝球体中MASH病理.
- 通过CXCR4-STAT信号传递,TFF2增强了CD4+T细胞的增殖和Th1/Th17分化.
- 肝细胞特异性TFF2抑制改善了小鼠的MASH进展.
结论:
- 一个OGT-TFF2轴调解MASH中的肝细胞-CD4T细胞交叉.
- 这一轴代表了MASH等慢性肝病的潜在治疗标.
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