Proteasome-independent degradation of HIV-1 in naturally non-permissive human placental trophoblast cells.

Proteasome-independent degradation of HIV-1 in naturally non-permissive human placental trophoblast cells.
复制标题

DOI:
10.1186/1742-4690-6-46
复制
发表时间:
2009-05-15
期刊:
影响因子:
3.3
通讯作者:
Menu E
Menu E
中科院分区:
医学2区
文献类型:
--
作者:
Ross AL;Cannou C;Barré-Sinoussi F;Menu E

文献摘要

参考文献

被引文献

相似文献

人类胎盘来源的细胞系 BeWo 已被证明对无细胞 HIV-1 感染具有限制性。然而,BeWo 细胞允许 VSV-G 假型 HIV-1 感染(该病毒通过受体独立机制进入细胞),并允许 HIV-1 通过细胞间途径感染。在这里,我们分析了野生型 BeWo(CCR5+、CXCR4+)和 BeWo-CD4+(CD4+、CCR5+、CXCR4+)细胞中的病毒进入情况。我们报告说,HIV-1 内化在这两种细胞系中均不受限制。 VSV-G HIV-1 假型和 R5 或 X4 病毒体之间的内化 p24 抗原水平相当。接下来我们分析了内化病毒颗粒的命运;随着时间的推移,X4 和 R5 HIV-1 病毒颗粒在 BeWo 细胞中的稳定性不如 VSV-G HIV-1 假型病毒颗粒。然后,我们使用蛋白酶体抑制剂研究了蛋白酶体在限制 BeWo 细胞中无细胞 HIV-1 感染中的作用。我们观察到蛋白酶体抑制剂处理的细胞中 VSV-G 假型 HIV-1 感染水平有所增加,但 R5-Env 或 X4-Env 假型病毒粒子的感染仍然受到限制。总的来说,这些结果表明,无细胞的 HIV-1 感染遇到了导致非生产性进入途径的表面阻断,该途径要么主动靶向传入的病毒体进行非蛋白酶体降解,并阻止它们释放到细胞质中,要么导致病毒复制必需的机制失活。
The human placenta-derived cell line BeWo has been demonstrated to be restrictive to cell-free HIV-1 infection. BeWo cells are however permissive to infection by VSV-G pseudotyped HIV-1, which enters cells by a receptor-independent mechanism, and to infection by HIV-1 via a cell-to-cell route. Here we analysed viral entry in wild type BeWo (CCR5+, CXCR4+) and BeWo-CD4+ (CD4+, CCR5+, CXCR4+) cells. We report that HIV-1 internalisation is not restricted in either cell line. Levels of internalised p24 antigen between VSV-G HIV-1 pseudotypes and R5 or X4 virions were comparable. We next analysed the fate of internalised virions; X4 and R5 HIV-1 virions were less stable over time in BeWo cells than VSV-G HIV-1 pseudotypes. We then investigated the role of the proteasome in restricting cell-free HIV-1 infection in BeWo cells using proteasome inhibitors. We observed an increase in the levels of VSV-G pseudotyped HIV-1 infection in proteasome-inhibitor treated cells, but the infection by R5-Env or X4-Env pseudotyped virions remains restricted. Collectively these results suggest that cell-free HIV-1 infection encounters a surface block leading to a non-productive entry route, which either actively targets incoming virions for non-proteasomal degradation, and impedes their release into the cytoplasm, or causes the inactivation of mechanisms essential for viral replication.
DOI: 10.1128/jvi.79.3.1581-1594.2005
发表时间: 2005-02-01
影响因子: 5.4
作者:
Daecke, J;Fackler, OT;Kräusslich, HG
通讯作者: Kräusslich, HG
DOI: 10.1128/jvi.72.5.3623-3634.1998
发表时间: 1998-05-01
影响因子: 5.4
作者:
Mondor, I;Ugolini, S;Sattentau, QJ
通讯作者: Sattentau, QJ
DOI: 10.1074/jbc.m606066200
发表时间: 2006-12-01
影响因子: 4.8
作者:
Chatterji, Udayan;Bobardt, Michael D.;Gallay, Philippe A.
通讯作者: Gallay, Philippe A.
DOI: 10.1083/jcb.200706154
发表时间: 2008-02-11
影响因子: 7.8
作者:
Campbell, Edward M.;Perez, Omar;Anderson, Jenny L.;Hope, Thomas J.
通讯作者: Hope, Thomas J.
DOI: 10.1128/jvi.71.9.6359-6372.1997
发表时间: 1997-09-01
影响因子: 5.4
作者:
Kilani, RT;Chang, LJ;Guilbert, LJ
通讯作者: Guilbert, LJ