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J. Virol., Feb 1996, 898-904, Vol 70, No. 2
TM Tumpey, SH Chen, JE Oakes and RN Lausch
Herpes simplex virus type 1 (HSV-1) infection of the murine cornea induces
the rapid infiltration of neutrophils. We investigated whether these cells
could influence virus replication. BALB/c mice treated with monoclonal
antibody (MAb) RB6-8C5 experienced a profound depletion of neutrophils in
the bloodstream, spleen, and cornea. In these animals, virus titers in the
eye were significantly higher than those in the immunoglobulin G-treated
controls at 3 days postinfection. By day 9, virus was no longer detectable
in the controls, whereas titers of 10(3) to 10(6) PFU were still present in
the neutrophil-depleted hosts. Furthermore, virus spread more readily to
the skin and brains of MAb RB6-8C5-treated animals, rendering them
significantly more susceptible to HSV-1-induced blepharitis and
encephalitis. Only 25% of the treated animals survived, whereas all of the
controls lived. Although MAb RB6- 8C5 treatment did not alter the CD4+
T-cell, B-cell, natural killer cell, or macrophage populations, the CD8+
T-cell population was partially reduced. Therefore, the experiments were
repeated in severe combined immunodeficiency mice, which lack CD8+ T cells.
Again virus growth was found to be significantly elevated in the eyes,
trigeminal ganglia, and brains of the MAb RB6-8C5-treated hosts. These
results strongly indicate that in both immunocompetent and immunodeficient
mice, neutrophils play a significant role in helping to control the
replication and spread of HSV-1 after corneal infection.
Copyright © 1996, American Society for Microbiology
Neutrophil-mediated suppression of virus replication after herpes simplex virus type 1 infection of the murine cornea
Department of Microbiology and Immunology, College of Medicine, University of South Alabama, Mobile 36688, USA.
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