Candida albicans delays HIV-1 replication in macrophages.

Candida albicans delays HIV-1 replication in macrophages.
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DOI:
10.1371/journal.pone.0072814
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Geffner J
Geffner J
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Rodriguez Rodrigues C;Remes Lenicov F;Jancic C;Sabatté J;Cabrini M;Ceballos A;Merlotti A;Gonzalez H;Ostrowski M;Geffner J

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巨噬细胞是最重要的 HIV-1 靶细胞之一。与 CD4+ T 细胞不同,巨噬细胞对 HIV-1 的细胞吞噬作用具有抵抗力。它们能够作为病毒储存库长期生产和藏匿病毒。白色念珠菌 (CA) 是一种共生真菌,定植于 HIV-1 进入的门户,例如阴道和直肠,并成为艾滋病患者的侵袭性病原体。在这项研究中,我们分析了 CA 调节人类单核细胞来源的巨噬细胞中 HIV-1 感染过程的能力。我们发现,在病毒接种后 7 天进行评估时,CA 消除了巨噬细胞中的 HIV-1 复制。在单核细胞衍生的树突细胞中观察到类似的抑制作用。对巨噬细胞中抑制 HIV-1 产生的机制的分析表明,CA 有效地隔离 HIV-1 颗粒,避免其感染性。此外,通过作用于巨噬细胞本身,CA通过降低CD4的表达、增强CCR5相互作用趋化因子CCL3/MIP-1α、CCL4/MIP-1β和CCL5/RANTES的产生以及刺激干扰素-α和限制因子APOBEC3G、APOBEC3F和tetherin的产生来降低巨噬细胞感染HIV-1的可能性。有趣的是,在病毒接种后 2-3 周评估巨噬细胞的感染情况时,HIV-1 复制的破坏被克服了。然而,当定期将 CA 添加到 HIV-1 攻击的巨噬细胞中时,这种 HIV-1 感染的重新激活可能会被 CA 抑制。在外周巨噬细胞中诱导静默的 HIV-1 感染(细胞不断面对 CA)可能有助于 HIV-1 逃避免疫反应并促进抗逆转录病毒治疗的抵抗力。
Macrophages are one of the most important HIV-1 target cells. Unlike CD4+ T cells, macrophages are resistant to the cytophatic effect of HIV-1. They are able to produce and harbor the virus for long periods acting as a viral reservoir. Candida albicans (CA) is a commensal fungus that colonizes the portals of HIV-1 entry, such as the vagina and the rectum, and becomes an aggressive pathogen in AIDS patients. In this study, we analyzed the ability of CA to modulate the course of HIV-1 infection in human monocyte-derived macrophages. We found that CA abrogated HIV-1 replication in macrophages when it was evaluated 7 days after virus inoculation. A similar inhibitory effect was observed in monocyte-derived dendritic cells. The analysis of the mechanisms responsible for the inhibition of HIV-1 production in macrophages revealed that CA efficiently sequesters HIV-1 particles avoiding its infectivity. Moreover, by acting on macrophages themselves, CA diminishes their permissibility to HIV-1 infection by reducing the expression of CD4, enhancing the production of the CCR5-interacting chemokines CCL3/MIP-1α, CCL4/MIP-1β, and CCL5/RANTES, and stimulating the production of interferon-α and the restriction factors APOBEC3G, APOBEC3F, and tetherin. Interestingly, abrogation of HIV-1 replication was overcome when the infection of macrophages was evaluated 2-3 weeks after virus inoculation. However, this reactivation of HIV-1 infection could be silenced by CA when added periodically to HIV-1-challenged macrophages. The induction of a silent HIV-1 infection in macrophages at the periphery, where cells are continuously confronted with CA, might help HIV-1 to evade the immune response and to promote resistance to antiretroviral therapy.
DOI: 10.4049/jimmunol.173.11.6735
发表时间: 2004-12-01
影响因子: 4.4
作者:
Devadas, K;Hardegen, NJ;Dhawan, S
通讯作者: Dhawan, S
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发表时间: 2010-05-01
影响因子: 5.5
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DOI: 10.1186/1742-4690-6-111
发表时间: 2009-12-04
期刊: Retrovirology
影响因子: 3.3
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Colin L;Van Lint C
通讯作者: Van Lint C
DOI: 10.1126/science.3095925
发表时间: 1986-11-28
期刊: SCIENCE
影响因子: 56.9
作者:
HOXIE, JA;ALPERS, JD;REED, JC
通讯作者: REED, JC
DOI: 10.1086/515231
发表时间: 1998-04-01
影响因子: 6.4
作者:
Gruber, A;Lukasser-Vogl, E;Würzner, R
通讯作者: Würzner, R