NDLI: Evasion of the Mucosal Innate Immune System by Herpes Simplex Virus Type 2 ▿

Content Provider	PubMed Central
Author	Peng, Tao Zhu, Jia Klock, Alexis Phasouk, Khamsone Huang, Meei-li Koelle, David M. Wald, Anna Corey, Lawrence
Copyright Year	2009
Abstract	Understanding the mechanisms by which herpes simplex virus (HSV) evades host immune defenses is critical to defining new approaches for therapy and prevention. We performed transcriptional analyses and immunocytochemistry on sequential biopsy specimens of lesional tissue from the acute through the posthealing phases of recurrent mucocutaneous HSV-2 infection. Histological analysis of these biopsy specimens during the acute stage revealed a massive infiltration of T cells, as well as monocytes/macrophages, a large amount of myeloid, and a small number of plasmacytoid dendritic cells, in the dermis of these lesional biopsy specimens. Type I interferon (IFN-β and IFN-α) was poorly expressed and gamma IFN (IFN-γ) potently induced during time periods in which we detected abundant amounts of HSV-2 antigens and HSV-2 RNA. IFN-stimulated genes were also markedly upregulated, with expression patterns that more closely matched those in primary human fibroblasts treated by IFN-γ than those in fibroblasts treated by IFN-β. Transcriptional arrays of the same lesional biopsy sites during healing and at 2 and 4 weeks posthealing revealed no HSV nucleic acids or antigen; however, there was persistent expression of IFN-γ, with very low levels of IFN-β and IFN-α. The findings of extremely low levels of IFN-α and IFN-β, despite the presence of a large number of cells capable of synthesizing these substances, suggest a potent alteration in host defense during HSV-2 infection in vivo. HSV-2's blockade of the innate immune system's production of type I IFN may be a major factor in allowing the virus to break through host mucosal defenses.
Related Links	http://dx.doi.org/10.1128/jvi.00939-09
Ending Page	12568
Page Count	10
Starting Page	12559
File Format	PDF
ISSN	0022538X
e-ISSN	10985514
Journal	Journal of Virology
Issue Number	23
Volume Number	83
Language	English
Publisher	American Society for Microbiology (ASM)
Publisher Date	2009-12-01
Access Restriction	Open
Rights Holder	American Society for Microbiology (ASM)
Subject Keyword	Immunology Virology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Virology Immunology Microbiology Insect Science

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