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Journal of Virology, July 2001, p. 6115-6120, Vol. 75, No. 13
Interdisciplinary Programs in
Immunology1 and
Neuroscience2 and Departments of
Pediatrics3 and
Microbiology,4 University of Iowa, Iowa
City, Iowa 52242
Received 10 January 2001/Accepted 28 March 2001
Mice infected with mouse hepatitis virus (MHV) strain JHM
develop primary demyelination. Herein we show that axonal damage occurred in areas of demyelination and also in adjacent areas devoid of
myelin damage. Immunodeficient MHV-infected RAG1
0022-538X/01/$04.00+0 DOI: 10.1128/JVI.75.13.6115-6120.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Axonal Damage Is T Cell Mediated and Occurs
Concomitantly with Demyelination in Mice Infected with a
Neurotropic Coronavirus
/
mice (mice
defective in recombinase activating gene 1 expression) do not develop
demyelination unless they receive splenocytes from a mouse previously
immunized against MHV (G. F. Wu, A. Dandekar, L. Pewe, and S. Perlman, J. Immunol. 165:2278-2286, 2000). In the present study,
we show that adoptive transfer of T cells was also required for the
majority of the axonal injury observed in these animals. Both
demyelination and axonal damage were apparent by 7 days posttransfer.
Recent data suggest that axonal injury is a major factor in the
long-term disability observed in patients with multiple sclerosis. Our
data demonstrate that immune system-mediated damage to axons is also a
common feature in mice with MHV-induced demyelination. Remarkably,
there appeared to be a minimal, if any, interval of time between the
appearance of demyelination and that of axonal injury.
*
Corresponding author. Mailing address: Department of
Pediatrics, 2042 Medical Laboratories, University of Iowa, Iowa City, IA 52242. Phone: (319) 335-8549. Fax: (319) 335-8991. E-mail: Stanley-Perlman{at}uiowa.edu.
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