A&R:去纤维苷(Defibrotide)抑制抗磷脂抗体介导的中性粒细胞胞外陷阱形成和静脉血栓形成

2022-05-11 MedSci原创 MedSci原创

这项研究首次证明了去纤维苷对抗磷脂综合征固有的中性粒细胞介导的血栓性炎症的机制。

    目的:去纤维苷是一种聚阴离子寡核苷酸的异质混合物,目前已获准用于治疗移植相关的静脉闭塞性疾病。虽然去纤维苷在限制内皮细胞活化方面具有已知作用,但一些研究也证明了其抗白细胞特性。在最近的一项研究中,该组研究人员发现中性粒细胞胞外陷阱(NETs) 在抗磷脂综合征(APS)血栓并发症中发挥作用。在本研究中,该研究团队研究了去纤维苷可能在体外和小鼠模型中减轻APS相关NET形成的假设。

   方法:研究人员使用体外试验和小鼠模型来确定去纤维苷抑制APSNET形成和静脉血栓形成的机制。包括APS病人及健康对照的血清中分离IgG,分离中性粒细胞进行NET形成实验,胞内cAMP含量测量;采用 Cre/loxP系统构建腺苷A2A受体敲除小鼠模型和体内通过电解下腔静脉的方法诱导静脉血栓形成。

    结果:在110μg/ml的剂量范围内,去纤维苷显著抑制了从APS患者中分离的 IgG刺激的对照嗜中性粒细胞的NET形成。去纤维苷增加中性粒细胞中细胞内环AMP的水平,并通过阻断腺苷A2A受体或抑制环AMP依赖性激酶蛋白激酶A减轻其对NET形成的抑制作用 剂量范围为15150 mg/kg/天在抗磷脂抗体加速血栓形成模型中抑制 NET形成和静脉血栓形成,这种效应在腺苷A2A受体敲除小鼠中降低。

    结论:这项研究首次证明了去纤维苷对抗APS固有的中性粒细胞介导的血栓性炎症的机制。

 

出处:Ali, R.A., Estes, S.K., Gandhi, A.A., Yalavarthi, S., Hoy, C.K., Shi, H., Zuo, Y., Erkan, D. and Knight, J.S. (2022), Defibrotide Inhibits Antiphospholipid Antibody–Mediated Neutrophil Extracellular Trap Formation and Venous Thrombosis. Arthritis Rheumatol, 74: 902-907. https://doi.org/10.1002/art.42017

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    2022-06-27 fusion
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