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Astrocytes resist hiv-1 fusion but engulf infected macrophage material

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Item Type:Article
Title:Astrocytes resist hiv-1 fusion but engulf infected macrophage material
Creators Name:Russell, R.A. and Chojnacki, J. and Jones, D.M. and Johnson, E. and Do, T. and Eggeling, C. and Padilla-Parra, S. and Sattentau, Q.J.
Abstract:HIV-1 disseminates to diverse tissues and establishes long-lived viral reservoirs. These reservoirs include the CNS, in which macrophage-lineage cells, and as suggested by many studies, astrocytes, may be infected. Here, we have investigated astrocyte infection by HIV-1. We confirm that astrocytes trap and internalize HIV-1 particles for subsequent release but find no evidence that these particles infect the cell. Astrocyte infection was not observed by cell-free or cell-to-cell routes using diverse approaches, including luciferase and GFP reporter viruses, fixed and live-cell fusion assays, multispectral flow cytometry, and super-resolution imaging. By contrast, we observed intimate interactions between HIV-1-infected macrophages and astrocytes leading to signals that might be mistaken for astrocyte infection using less stringent approaches. These results have implications for HIV-1 infection of the CNS, viral reservoir formation, and antiretroviral therapy.
Keywords:HIV-1, Astrocyte, Fusion, Macrophage, Phagocytosis, Brain
Source:Cell Reports
ISSN:2211-1247
Publisher:Cell Press
Volume:18
Number:6
Page Range:1473-1483
Date:7 February 2017
Official Publication:https://doi.org/10.1016/j.celrep.2017.01.027
PubMed:View item in PubMed

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