在MASH纤维化病原发生过程中解码CHI3L1/IL-13Rα2信号连接点
Qianqian Zheng1, Yanli Cao2, Xuefeng Jiang3
1Department of Pathophysiology, Basic Medicine College, China Medical University, Shenyang, China.
Science advances
|December 10, 2025
概括
代谢功能障碍相关的脂肪肝炎 (MASH) 涉及炎症和纤维化. 研究人员发现,基因酶3样1 (CHI3L1) 将免疫激活与肝纤维化联系在一起,为MASH提供了潜在的治疗标.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 免疫学 免疫学 免疫学
- 纤维化研究 纤维化研究
背景情况:
- 代谢功能障碍相关的脂肪肝炎 (MASH) 是一种进展性肝病,其特征是炎症和纤维化.
- 驱动MASH病变的确切免疫机制尚不完全理解.
研究的目的:
- 阐明MASH中炎症和纤维化之间的免疫机制.
- 为了确定关键的分子媒介和信号通路参与MASH进展.
- 评估CHI3L1作为MASH相关肝纤维化的潜在治疗标.
主要方法:
- 肝细胞-巨共同培养试验和重组性互白素-17A (IL-17A) 刺激.
- 研究信号通路,包括JNK/c-Jun和p38 MAPK/ATF3.
- 使用了针对Chi3l1和Il13ra2.2的细胞特异性淘汰赛小鼠模型.
- 在临床前模型中使用CHI3L1中和抗体.
主要成果:
- 确定了一种由肝细胞衍生的IL-17A信号,通过JNK/c-Jun.增强巨细胞CHI3L1表达.
- 证明CHI3L1将IL-13Rα2与肝星细胞 (HSC) 结合,激活p38 MAPK/ATF3.3.
- 表明这种级联诱导利波卡林-2 (LCN2),促进HSC激活和肝纤维化.
- 删除Chi3l1或Il13ra2显著减少肝炎和纤维化.
- 在小鼠中,CHI3L1 中和改善了MASH疾病的结果.
结论:
- 在MASH病变发生过程中发现了一种新的IL-17A-CHI3L1-IL-13Rα2-LCN2信号轴.
- 确立了CHI3L1作为一个关键的调解者,将免疫激活与MASH中的纤维化重塑联系起来.
- 将CHI3L1定位为缓解MASH相关肝纤维化的有前途的治疗标.
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