不调节的膜类型2上皮细胞蛋白质稳定促进纤维化巨细胞迁移抑制因子-CD74信号传递
Sang-Hun Kim1, Jessica Nouws1, Jannik Ruwisch2
1Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA.
Science translational medicine
|December 3, 2025
概括
在肺细胞中破坏无素-蛋白酶体系统通过巨细胞迁移抑制因子 (MIF) 放大纤维化. 准MIF-CD74信号可能治疗异常性肺纤维化 (IPF).
科学领域:
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
- 肺部医学 肺部医学
背景情况:
- 膜类型2上皮细胞 (AEC2s) 中异常蛋白质静止与异常性肺纤维化 (IPF) 有关.
- 在AEC2s中,ubiquitin-proteasome系统 (UPS) 的特定作用及其对IPF病原体的贡献仍然不清楚.
研究的目的:
- 调查UPS中断在AEC2s促进肺纤维化中的作用.
- 为了确定参与UPS介导的益纤维素反应的信号通路.
- 评估巨细胞迁移抑制因子 (MIF) 家族蛋白质作为IPF的潜在治疗点.
主要方法:
- 特定于AEC2的库林3 (Cul3) 删除模型来模拟UPS中断.
- 布莱米辛诱导的肺损伤和TGFB1转基因小鼠模型.
- 在特定细胞群中遗传删除Mif,Mif-2和Cd74.
- 药理上抑制MIF的作用.
- 来自小鼠模型和IPF患者的支气管洗液 (BALF) 和肺组织的分析.
主要成果:
- 在AEC2s (Cul3删除) 中的UPS中断诱导了自发和恶化的肺纤维化.
- 在肺组织和BALF中观察到MIF和MIF-2水平的增加.
- 在多种模型中,MIF-CD74的遗传或药理抑制信号衰减性肺纤维化.
- 在IPF患者中,BALF MIF水平升高与死亡率增加相关.
结论:
- 在AEC2s中UPS的中断驱动了通过MIF家族蛋白质的profibrotic信号传递.
- MIF-CD74通路代表了上皮UPS功能和肺纤维化中的巨细胞激活之间的关键联系.
- 准MIF-CD74交叉交谈为像IPF这样的纤维性肺部疾病提供了一个有希望的治疗策略.
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