死细胞传感器Clec4e通过激活未折叠的蛋白质反应促进了前性巨类型
Marc Clément1, Gemma Basatemur1, Leanne Masters1
1From Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (M.C., G.B., L.M., L.B., J.G., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, Paris, France (P.B., Z.M.); Iwawaki Laboratory, Advanced Scientific Research Leaders Development Unit, Gunma University, Maebashi, Gunma, Japan (T.I.); Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center and Department of Dermatology (M.K.), Eberhard Karls University, Tübingen, Germany; and Division of Molecular Immunology, Medical Institute of Bioregulation, Kyushu University, Kyushu, Japan (S.Y.).
死亡细胞激活C型莱克受体4e (Clec4e) 会导致动脉样硬化,因为它会损害胆固醇的流失并促进炎症. 针对Clec4e信号可能为心血管疾病提供新的治疗策略.
科学领域:
- 免疫学
- 心血管生物学
- 分子医学
背景情况:
- 动脉样损伤扩张涉及富含脂质的死核,与并发症有关.
- 死核形成的分子机制,包括脂质处理和炎症,尚未完全理解.
- C型莱克受体4e (Clec4e) 感知死亡细胞模式并促进炎症.
研究的目的:
- 调查Clec4e激活在动脉形成中的因果作用.
- 评估Clec4e对巨细胞功能和动脉样硬化的影响.
主要方法:
- 在体外分析Clec4e对巨细胞功能的激活.
- 使用低密度脂蛋白受体缺乏 (Ldlr-/ -) 的小鼠进行体内研究.
- 在小鼠模型中对Clec4e,Chop,Ire1a和Atf3进行基因操作.
主要成果:
- 在人类和小鼠的动脉样硬化病变中表达和激活Clec4e.
- Clec4e信号抑制胆固醇外流,诱导内质网膜压力,并促进巨细胞的炎症.
- 骨髓衍生细胞中的Clec4e缺陷可显著降低Ldlr-/小鼠的动脉样硬化.
结论:
- 在动脉样硬化的关键路径协调中,Clec4e发挥着非冗余的作用.
- Clec4e可能是动脉样硬化和其他慢性炎症疾病的治疗点.
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