Platelets amplify inflammation in arthritis via collagen-dependent microparticle production.

Platelets amplify inflammation in arthritis via collagen-dependent microparticle production.
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DOI:
10.1126/science.1181928
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发表时间:
2010-01-29
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Lee DM
Lee DM
中科院分区:
其他
文献类型:
--
作者:
Boilard E;Nigrovic PA;Larabee K;Watts GF;Coblyn JS;Weinblatt ME;Massarotti EM;Remold-O'Donnell E;Farndale RW;Ware J;Lee DM

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除了在血栓形成和伤口修复中的关键作用外,血小板还参与炎症反应。我们研究了血小板在自身免疫性疾病类风湿性关节炎中的作用。我们在类风湿性关节炎和其他形式的炎性关节炎患者的关节液中发现了血小板微粒--由活化血小板精心制作的亚微米囊泡,但在骨关节炎患者的关节液中没有发现。血小板微粒是促炎性的,通过白细胞介素-1引起滑膜成纤维细胞的细胞因子反应。与这些发现相一致,血小板耗竭可减轻小鼠炎性关节炎。使用药理学和遗传学方法,我们确定了胶原受体糖蛋白VI作为关节炎病理生理学中血小板微粒生成的关键触发因素。因此,这些发现证明了血小板及其活化诱导的微粒在炎症性关节疾病中的先前未被重视的作用。
In addition to their pivotal role in thrombosis and wound repair, platelets participate in inflammatory responses. We investigated the role of platelets in the autoimmune disease rheumatoid arthritis. We identified platelet microparticles—submicrometer vesicles elaborated by activated platelets—in joint fluid from patients with rheumatoid arthritis and other forms of inflammatory arthritis, but not in joint fluid from patients with osteoarthritis. Platelet microparticles were proinflammatory, eliciting cytokine responses from synovial fibroblasts via interleukin-1. Consistent with these findings, depletion of platelets attenuated murine inflammatory arthritis. Using both pharmacologic and genetic approaches, we identified the collagen receptor glycoprotein VI as a key trigger for platelet microparticle generation in arthritis pathophysiology. Thus, these findings demonstrate a previously unappreciated role for platelets and their activation-induced microparticles in inflammatory joint diseases.
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