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Journal of Virology, July 2001, p. 6183-6192, Vol. 75, No. 13
0022-538X/01/$04.00+0   DOI: 10.1128/JVI.75.13.6183-6192.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Varicella-Zoster Virus Infection of Human Dendritic Cells and Transmission to T Cells: Implications for Virus Dissemination in the Host

Allison Abendroth,* Gavin Morrow, Anthony L. Cunningham, and Barry Slobedman

Centre for Virus Research, Westmead Millennium Institute and University of Sydney, Westmead, New South Wales 2145, Australia

Received 18 January 2001/Accepted 6 April 2001

During primary varicella-zoster virus (VZV) infection, it is presumed that virus is transmitted from mucosal sites to regional lymph nodes, where T cells become infected. The cell type responsible for VZV transport from the mucosa to the lymph nodes has not been defined. In this study, we assessed the susceptibility of human monocyte-derived dendritic cells to infection with VZV. Dendritic cells were inoculated with the VZV strain Schenke and assessed by flow cytometry for VZV and dendritic cell (CD1a) antigen expression. In five replicate experiments, 34.4% ± 6.6% (mean ± SEM) of CD1a+ cells were also VZV antigen positive. Dendritic cells were also shown to be susceptible to VZV infection by the detection of immediate-early (IE62), early (ORF29), and late (gC) gene products in CD1a+ dendritic cells. Infectious virus was recovered from infected dendritic cells, and cell-to-cell contact was required for transmission of virus to permissive fibroblasts. VZV-infected dendritic cells showed no significant decrease in cell viability or evidence of apoptosis and did not exhibit altered cell surface levels of major histocompatibility complex (MHC) class I, MHC class II, CD86, CD40, or CD1a. Significantly, when autologous T lymphocytes were incubated with VZV-infected dendritic cells, VZV antigens were readily detected in CD3+ T lymphocytes and infectious virus was recovered from these cells. These data provide the first evidence that dendritic cells are permissive to VZV and that dendritic cell infection can lead to transmission of virus to T lymphocytes. These findings have implications for our understanding of how virus may be disseminated during primary VZV infection.

* Corresponding author. Mailing address: Centre for Virus Research, Rm. 3024, Westmead Millennium Institute, Westmead Hospital, Westmead, 2145 NSW, Australia. Phone: 61 2 98459123. Fax: 61 2 98459100. E-mail: allison_abendroth{at}wmi.usyd.edu.au.

Journal of Virology, July 2001, p. 6183-6192, Vol. 75, No. 13
0022-538X/01/$04.00+0   DOI: 10.1128/JVI.75.13.6183-6192.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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