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多种冗余且协同的机制控制着血液中腺病毒在肝脏的潴留。

Redundant and synergistic mechanisms control the sequestration of blood-born adenovirus in the liver.

作者信息

Di Paolo Nelson C, van Rooijen Nico, Shayakhmetov Dmitry M

机构信息

Division of Medical Genetics, Department of Medicine, University of Washington, Seattle, Washington, USA.

出版信息

Mol Ther. 2009 Apr;17(4):675-84. doi: 10.1038/mt.2008.307. Epub 2009 Feb 17.

Abstract

Human adenovirus (Ad) is a ubiquitous pathogen causing a wide range of diseases. Although the interactions of human Ad serotype 5 (Ad5) with susceptible cells in vitro are known in great detail, host factors controlling the tissue specificity of Ad5 infection in vivo remain poorly understood. Here, we analyzed the mechanisms of sequestration by the liver for blood-born human Ads and Ad5-based vectors. Our data suggest that several known mechanisms that lead to Ad5 sequestration by the liver become engaged in a redundant, sequential, and synergistic manner to ensure the rapid clearance of circulating virus particles from the blood. These mechanisms include (i) trapping of the virus by liver residential macrophages, Kupffer cells; (ii) Ad5 hepatocyte infection via blood factor-hexon interactions; and (iii) Ad5 penton RGD motif-mediated interactions with liver endothelial cells and hepatocytes, mediating virus retention in the space of Disse. More important, we show that when all of these mechanisms are simultaneously inactivated via mutations of Ad5 capsid proteins and pharmacological interventions, virus sequestration by the liver is markedly reduced. Therefore, our study is the first demonstration of the principal possibility of ablating the sequestration of blood-born Ad in the liver via specific inactivation of a defined set of mechanisms that control this process.

摘要

人腺病毒(Ad)是一种普遍存在的病原体,可引发多种疾病。尽管对人腺病毒血清型5(Ad5)与易感细胞在体外的相互作用已有详细了解,但对于体内控制Ad5感染组织特异性的宿主因子仍知之甚少。在此,我们分析了肝脏对血源性人腺病毒和基于Ad5的载体进行隔离的机制。我们的数据表明,几种导致肝脏隔离Ad5的已知机制以冗余、相继且协同的方式发挥作用,以确保从血液中快速清除循环病毒颗粒。这些机制包括:(i)肝脏驻留巨噬细胞库普弗细胞捕获病毒;(ii)通过血液因子-六邻体相互作用实现Ad5肝细胞感染;(iii)Ad5五聚体RGD基序介导与肝内皮细胞和肝细胞的相互作用,介导病毒滞留在狄氏间隙。更重要的是,我们表明,当通过Ad5衣壳蛋白突变和药物干预同时使所有这些机制失活时,肝脏对病毒的隔离会显著减少。因此,我们的研究首次证明了通过特异性失活一组控制此过程的特定机制来消除肝脏中血源性Ad隔离的主要可能性。

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