核酸结合性寡聚化域2受体在血小板中表达,并增强血小板激活和血栓形成
Si Zhang1, Shenghui Zhang1, Liang Hu1
1From Key Laboratory of Molecular Medicine, Ministry of Education, and Department of Biochemistry and Molecular Biology, Fudan University Shanghai Medical College, Shanghai, China (Si Zhang, Shenghui Zhang, L.H., L.Z., J.Y., L.C., Z.D.); Department of Internal Medicine, and Institute of Liver Disease, Fudan University Zhongshan Hospital, Shanghai, China (R.X.); Thoracic Oncology Research Laboratory, University of Pennsylvania, Philadelphia, (G.C.); Department of Internal Medicine, University of Kansas School of Medicine, Wichita (J.S.M.); and Department of Physiology and Sol Sherry Thrombosis Research Center, Temple University School of Medicine, Philadelphia, PA (S.P.K.).
核酸结合寡聚化域2 (NOD2) 在血小板中表达,增强血小板激活,血栓形成和炎症,特别是在感染期间. 这项研究揭示了NOD2信号与血栓事件之间的新联系.
科学领域:
- 免疫学 免疫学 免疫学
- 血液学 血液学 血液学
- 分子生物学分子生物学
背景情况:
- 模式识别受体NOD2在免疫中的作用已被证实.
- 然而,它在血小板中的表达和功能仍然未被探索.
研究的目的:
- 为了研究NOD2在血小板中的存在和功能.
- 确定NOD2在血小板激活,聚合和血栓形成中的作用.
主要方法:
- 逆转录聚合酶连锁反应 (RT-PCR) 和西方涂抹用于检测人类和小鼠血小板中的NOD2表达.
- 穆拉二 (MDP) 作为NOD2激动剂,以评估血小板激活.
- 肠道显微镜评估体内血栓形成的情况.
- 血小板枯竭和输血实验.
- 下游信号通路 (MAPK,NO/sGC/cGMP/PKG) 的分析.
主要成果:
- 人类和小鼠的血小板表达NOD2,在MDP刺激时二元化.
- NOD2的激活增强了血小板聚合,分泌和凝块收缩.
- 在小鼠中,MDP在体内加速动脉血栓形成和血液静止,这取决于血小板NOD2.
- 败血症患者的血也通过NOD2.2增强了血小板聚合.
- NOD2的激活促进了血小板中促炎性细胞因子IL-1β的成熟.
结论:
- NOD2在血小板中表达,并在血小板激活和动脉血栓形成中发挥关键作用.
- 血小板NOD2信号在感染期间可能是相关的,将血栓事件与炎症联系起来.
- 这项研究首次证明了血小板中的NOD类受体及其与血栓形成和炎症的联系.
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