Real-time Imaging of Rabies Virus Entry into Living Vero cells.

Real-time Imaging of Rabies Virus Entry into Living Vero cells.
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狂犬病病毒进入活 Vero 细胞的实时成像

DOI:
10.1038/srep11753
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发表时间:
2015-07-07
期刊:
影响因子:
4.6
通讯作者:
Wang H
Wang H
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Xu H;Hao X;Wang S;Wang Z;Cai M;Jiang J;Qin Q;Zhang M;Wang H

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了解狂犬病病毒(RABV)的感染机制,对狂犬病的防治具有重要意义。然而,由于方法和病毒模型有限,感染机制在很大程度上仍然没有表征。本研究利用单病毒追踪技术对狂犬病减毒活疫苗SRV9株在Vero细胞中的感染过程进行了动态、全局的可视化研究。首先,发现富含肌动蛋白的丝状伪足有利于病毒到达胞体。此外,通过进行药物扰动实验,我们证实,RABV内化到Vero细胞的收益通过经典的动力蛋白依赖网格蛋白介导的内吞作用的要求完整的肌动蛋白,但小窝依赖的内吞作用不参与。然后,我们的实时成像结果明确揭示了病毒内化和细胞转运动力学的特征。此外,我们的研究结果直接和定量地揭示了内化RABV颗粒的细胞内运动在很大程度上是微管依赖性的。总的来说,我们的工作对于理解RABV感染的初始步骤和阐明感染后的机制至关重要。值得注意的是,这些结果为开发新的有效的抗病毒靶点提供了深刻的见解。
Understanding the mechanism of rabies virus (RABV) infection is vital for prevention and therapy of virulent rabies. However, the infection mechanism remains largely uncharacterized due to the limited methods and viral models. Herein, we utilized a powerful single-virus tracking technique to dynamically and globally visualize the infection process of the live attenuated rabies vaccine strain-SRV9in living Vero cells. Firstly, it was found that the actin-enriched filopodia is in favor of virus reaching to the cell body. Furthermore, by carrying out drug perturbation experiments, we confirmed that RABV internalization into Vero cells proceeds via classical dynamin-dependent clathrin-mediated endocytosis with requirement for intact actin, but caveolae-dependent endocytosis is not involved. Then, our real-time imaging results unambiguously uncover the characteristics of viral internalization and cellular transport dynamics. In addition, our results directly and quantitatively reveal that the intracellular motility of internalized RABV particles is largely microtubule-dependent. Collectively, our work is crucial for understanding the initial steps of RABV infection and elucidating the mechanisms of post-infection. Significantly, the results provide profound insight into development of novel and effective antiviral targets.
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