Slit2-Robo4 receptor responses inhibit ANDV directed permeability of human lung microvascular endothelial cells.

Slit2-Robo4 receptor responses inhibit ANDV directed permeability of human lung microvascular endothelial cells.
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DOI:
10.1016/j.antiviral.2013.05.004
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发表时间:
2013-08
期刊:
影响因子:
7.6
通讯作者:
Mackow, Erich R.
Mackow, Erich R.
中科院分区:
医学2区
文献类型:
--
作者:
Gorbunova, Elena E.;Gavrilovskaya, Irina N.;Mackow, Erich R.

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汉坦病毒非裂解性感染人内皮细胞(ECs)并引起水肿和出血性疾病。安第斯病毒(ANDV)引起汉坦病毒肺综合征(HPS),汉坦病毒(HTNV)引起肾综合征出血热(HFRS)。汉坦病毒增强血管内皮生长因子导向的EC渗透性,导致内皮细胞粘附连接(AJs)的解体。最近的研究表明,Slit2与ECs上Robo1/Robo4受体的结合对AJ的分解和血管液体屏障功能具有相反的作用。在这里,我们证明了Slit2通过与Robo4的相互作用抑制ANDV和HTNV诱导的肺微血管ECs (PMECs)的通透性和AJ拆卸。相比之下,Slit2对ANDV感染的人脐静脉内皮细胞(HUVECs)的渗透性没有影响。Robo1/Robo4表达分析表明,PMECs表达Robo4而不表达Robo1,而HUVECs同时表达Robo4和Robo1受体。在PMEC中,SiRNA敲低Robo4阻止了Slit2对ANDV诱导的渗透性的抑制,这表明Robo4受体决定了PMEC对Slit2的反应。总的来说,这些数据证明了pmes中Slit2/Robo4响应的选择性作用,可以抑制ANDV诱导的渗透性和AJ拆卸。这些发现表明,Slit2s作为一种潜在的HPS治疗药物,可以稳定肺内皮,拮抗ANDV诱导的肺水肿。
Hantaviruses nonlytically infect human endothelial cells (ECs) and cause edematous and hemorrhagic diseases. Andes virus (ANDV) causes hantavirus pulmonary syndrome (HPS), and Hantaan virus (HTNV) causes hemorrhagic fever with renal syndrome (HFRS). Hantaviruses enhance vascular endothelial growth factor directed EC permeability resulting in the disassembly of inter-endothelial cell adherens junctions (AJs). Recent studies demonstrate that Slit2 binding to Robo1/Robo4 receptors on ECs has opposing effects on AJ disassembly and vascular fluid barrier functions. Here we demonstrate that Slit2 inhibits ANDV and HTNV induced permeability and AJ disassembly of pulmonary microvascular ECs (PMECs) by interactions with Robo4. In contrast, Slit2 had no effect on the permeability of ANDV infected human umbilical vein ECs (HUVECs). Analysis of Robo1/Robo4 expression determined that PMECs express Robo4, but not Robo1, while HUVECs expressed both Robo4 and Robo1 receptors. SiRNA knockdown of Robo4 in PMECs prevented Slit2 inhibition of ANDV induced permeability demonstrating that Robo4 receptors determine PMEC responsiveness to Slit2. Collectively, this data demonstrates a selective role for Slit2/Robo4 responses within PMECs that inhibits ANDV induced permeability and AJ disassembly. These findings suggest Slit2s utility as a potential HPS therapeutic that stabilizes the pulmonary endothelium and antagonizes ANDV induced pulmonary edema.
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