抑制免疫球蛋白E可以减轻肺高血压
Ting Shu1, Ying Liu2, Yitian Zhou1,3
1State Key Laboratory of Medical Molecular Biology, Department of Pathophysiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China.
升高的免疫球蛋白E (IgE) 通过激活巨细胞驱动肺高血压 (PH). 阻断IgE或其受体FcεRIα对治疗这种严重的心肺疾病有希望.
科学领域:
- 免疫学 免疫学 免疫学
- 心脏病学 心脏病学
- 肺部病理学 肺部病理学
背景情况:
- 肺高血压 (PH) 是一种严重的心肺疾病,其特征是肺血管重塑.
- 免疫球蛋白E (IgE) 在PH病变发生中的作用以前是未知的.
- IgE涉及到大动脉血管重塑.
研究的目的:
- 研究IgE在肺动脉高血压 (PAH) 的发展中的作用.
- 探索IgE-FcεRIα信号作为PAH的潜在治疗点.
主要方法:
- 血清IgE水平测量在PAH患者,缺氧诱导的PH小鼠和单胺诱导的PH大鼠.
- 用抗IgE抗体治疗和FcεRIα缺乏模型来评估PH的发展.
- 单细胞RNA测序确定了FcεRIα在巨细胞 (MCs) 的表达.
- 采用了特定于MC的Fcer1a淘汰和奥马利祖马布治疗.
主要成果:
- 血清IgE在PH患者和动物模型中升高.
- 中和IgE或缺乏FcεRIα阻止了PH的发展.
- 在PH肺组织中,FcεRIα被上调,主要是在MCs上.
- 由IgE激活的MCs产生IL-6和IL-13,促进血管肌肉化.
- 奥马利祖马布在老鼠中缓解了已建立的PH.
结论:
- 在介导PH发育方面,IgE起着至关重要的作用.
- 特别是巨细胞中的IgE-FcεRIα信号,驱动PH中的血管重塑.
- 准IgE-FcεRIα信号传递代表了PAH的潜在治疗策略.
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