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Journal of Virology, January 2000, p. 209-217, Vol. 74, No. 1
F. I. Proctor Foundation and Department
of Ophthalmology, University of California, San Francisco, San
Francisco, California 94143-0944
Received 9 April 1999/Accepted 28 September 1999
We characterized the populations of primary sensory neurons that
become latently infected with herpes simplex virus (HSV) following
peripheral inoculation. Twenty-one days after ocular inoculation with
HSV strain KOS, 81% of latency-associated transcript (LAT)-positive
trigeminal ganglion (TG) neurons coexpressed SSEA3, 71% coexpressed
TrkA (the high-affinity nerve growth factor receptor), and
68% coexpressed antigen recognized by monoclonal antibody (MAb) A5;
less than 5% coexpressed antigen recognized by MAb KH10. The
distribution of LAT-positive, latently infected TG neurons contrasted
sharply with (i) the overall distribution of neuronal phenotypes in
latently infected TG and (ii) the neuronal distribution of viral
antigen in productively infected TG. Similar results were obtained
following ocular and footpad inoculation with KOS/62, a LAT deletion
mutant in which the LAT promoter is used to drive expression of the
Escherichia coli lacZ gene. Thus, although all neuronal
populations within primary sensory ganglia appear to be capable of
supporting a productive infection with HSV, some neuronal phenotypes
are more permissive for establishment of a latent infection with LAT
expression than others. Furthermore, expression of HSV LAT does not
appear to play a role in this process. These findings indicate that
there are marked differences in the outcome of HSV infection among the
different neuronal populations in the TG and highlight the key role
that the host neuron may play in regulating the repertoire of viral
gene expression during the establishment of HSV latent infection.
0022-538X/0/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Immunohistochemical Analysis of Primary Sensory
Neurons Latently Infected with Herpes Simplex Virus Type 1
*
Corresponding author. Mailing address: F. I. Proctor Foundation, UCSF Medical Center, Box 0944, San Francisco, CA
94143-0944. Phone: (415) 476-4419. Fax: (415) 476-0527. E-mail:
tpms{at}itsa.ucsf.edu.
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