Varicella-zoster virus T cell tropism and the pathogenesis of skin infection.
Varicella-zoster virus (VZV) is a medically important human alphaherpesvirus that causes varicella and zoster. VZV initiates primary infection by inoculation of the respiratory mucosa. In the course of primary infection, VZV establishes a life-long persistence in sensory ganglia; VZV reactivation from latency may result in zoster in healthy and immunocompromised patients. The VZV genome has at least 70 known or predicted open reading frames (ORFs), but understanding how these gene products function in virulence is difficult because VZV is a highly human-specific pathogen. We have addressed this obstacle by investigating VZV infection of human tissue xenografts in the severe combined immunodeficiency mouse model. In studies relevant to the pathogenesis of primary VZV infection, we have examined VZV infection of human T cell (thymus/liver) and skin xenografts. This work supports a new paradigm for VZV pathogenesis in which VZV T cell tropism provides a mechanism for delivering the virus to skin. We have also shown that VZV-infected T cells transfer VZV to neurons in sensory ganglia. The construction of infectious VZV recombinants that have deletions or targeted mutations of viral genes or their promoters and the evaluation of VZV mutants in T cell and skin xenografts has revealed determinants of VZV virulence that are important for T cell and skin tropism in vivo.
Arvin
Ann M
AM
Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, USA. aarvin@stanford.edu
Moffat
Jennifer F
JF
Sommer
Marvin
M
Oliver
Stefan
S
Che
Xibing
X
Vleck
Susan
S
Zerboni
Leigh
L
Ku
Chia-Chi
CC
D000818:Animals; D002644:Chickenpox / Q000276:immunology* / Q000821:virology*; D006562:Herpes Zoster / Q000276:immunology / Q000821:virology*; D014645:Herpesvirus 3, Human / Q000276:immunology*; D006801:Humans; D008221:Lymphoid Tissue / Q000276:immunology* / Q000821:virology; D051379:Mice; D016513:Mice, SCID; D012867:Skin / Q000276:immunology / Q000821:virology; D012874:Skin Diseases, Infectious / Q000276:immunology / Q000821:virology*; D013601:T-Lymphocytes / Q000276:immunology* / Q000821:virology
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