ADAMTS13: a new link between thrombosis and inflammation.

ADAMTS13: a new link between thrombosis and inflammation.
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ADAMTS13:血栓形成与炎症之间的新联系。

DOI:
10.1084/jem.20080130
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发表时间:
2008-09-01
影响因子:
15.3
通讯作者:
Wagner, Denisa D.
Wagner, Denisa D.
中科院分区:
医学1区
文献类型:
--
作者:
Chauhan, Anil K.;Kisucka, Janka;Brill, Alexander;Walsh, Meghan T.;Scheiflinger, Friedrich;Wagner, Denisa D.

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在急性和慢性炎症中,血管性血友病因子(VWF)水平升高,具有血小板反应蛋白I型重复序列-13(ADAMTS 13)活性的去整合素样和金属蛋白酶降低。我们假设ADAMTS 13通过切割超活性超大VWF(ULVWF)多聚体下调血栓形成和炎症。使用活体显微镜,我们发现ADAMTS 13缺乏导致白细胞在未受刺激的静脉上滚动增加,并增加炎症静脉中的白细胞粘附。这两个过程都依赖于VWF的存在。在Adamts 13 −/−小鼠中血小板的消耗减少了白细胞滚动,这表明血小板与ULVWF的相互作用有助于这一过程。与野生型(WT)小鼠相比,Adamts 13 −/−小鼠内皮P-选择素和血浆VWF水平升高,表明韦伯-帕拉德小体释放升高。在用组胺刺激时释放的ULVWF多聚体,一种韦伯-帕拉德体的促分泌剂,减缓了Adamts 13 −/−中的白细胞滚动,但在WT小鼠中没有。此外,在炎症模型中,ADAMTS 13缺陷导致中性粒细胞外渗增强,这一过程也依赖于VWF。我们的研究结果揭示了ADAMTS 13在防止过度自发性韦伯-帕拉德体分泌,以及在炎症过程中调节白细胞粘附和外渗中的重要作用。
von Willebrand factor (VWF) levels are elevated and a disintegrin-like and metalloprotease with thrombospondin type I repeats–13 (ADAMTS13) activity is decreased in both acute and chronic inflammation. We hypothesized that by cleaving hyperactive ultralarge VWF (ULVWF) multimers, ADAMTS13 down-regulates both thrombosis and inflammation. Using intravital microscopy, we show that ADAMTS13 deficiency results in increased leukocyte rolling on unstimulated veins and increased leukocyte adhesion in inflamed veins. Both processes were dependent on the presence of VWF. Depletion of platelets in Adamts13−/− mice reduced leukocyte rolling, suggesting that platelet interaction with ULVWF contributes to this process. Increased levels of endothelial P-selectin and plasma VWF in Adamts13−/− compared with wild-type (WT) mice indicated an elevated release of Weibel-Palade bodies. ULVWF multimers released upon stimulation with histamine, a secretagogue of Weibel-Palade bodies, slowed down leukocyte rolling in Adamts13−/− but not in WT mice. Furthermore, in inflammatory models, ADAMTS13 deficiency resulted in enhanced extravasation of neutrophils, and this process was also dependent on VWF. Our findings reveal an important role for ADAMTS13 in preventing excessive spontaneous Weibel-Palade body secretion, and in the regulation of leukocyte adhesion and extravasation during inflammation.
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