Journal of Virology, January 2001, p. 448-457, Vol. 75, No. 1
0022-538X/01/$04.00+0 DOI: 10.1128/JVI.75.1.448-457.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
-Dystroglycan Correlate with Viral Tropism and Disease
Kinetics
Division of Virology, Department of Neuropharmacology, The Scripps Research Institute, La Jolla, California 920371; The Edward Jenner Institute for Vaccine Research, Compton, Newbury, Berkshire RG20 7NN, United Kingdom2; Aviron, Mountain View, California 940343; and Howard Hughes Medical Institute, Departments of Physiology, Biophysics, and Neurology, University of Iowa College of Medicine, Iowa City, Iowa 522424
Received 14 July 2000/Accepted 2 October 2000
-Dystroglycan (
-DG) was recently identified as a receptor for
lymphocytic choriomeningitis virus (LCMV) and several other arenaviruses, including Lassa fever virus (W. Cao, M. D. Henry, P. Borrow, H. Yamada, J. H. Elder, E. V. Ravkov, S. T. Nichol, R. W. Compans, K. P. Campbell, and M. B. A. Oldstone, Science 282:2079-2081, 1998). Data presented in this paper
indicate that the affinity of binding of LCMV to
-DG determines
viral tropism and the outcome of infection in mice. To characterize
this relationship, we evaluated the interaction between
-DG and
several LCMV strains, variants, and reassortants. These viruses could
be divided into two groups with respect to affinity of binding to
-DG, dependence on this protein for cell entry, viral tropism, and
disease course. Viruses that exhibited high-affinity binding to
-DG
displayed a marked dependence on
-DG for cell entry and were blocked
from infecting mouse 3T6 fibroblasts by 1 to 4 nM soluble
-DG. In addition, high-affinity binding to
-DG correlated with an ability to
infiltrate the white pulp (T-dependent) area of the spleen, cause
ablation of the cytotoxic T-lymphocyte (CTL) response by day 7 postinfection, and establish a persistent infection. In contrast,
viruses with a lower affinity of binding to
-DG were only partially
inhibited from infecting
-DG
/
embryonic stem cells
and required a concentration of soluble
-DG higher than 100 nM to
prevent infection of mouse 3T6 fibroblasts. These viruses that bound at
low affinity were mainly restricted to the splenic red pulp, and the
host generated an effective CTL response that rapidly cleared the
infection. Reassortants of viruses that bound to
-DG at high and low
affinities were used to map genes responsible for the differences
described to the S RNA, containing the virus attachment protein
glycoprotein 1.
Manuscript 13229-NP of the Scripps Research Institute.
This article has been cited by other articles:
| J. Bacteriol. | Mol. Cell. Biol. | Microbiol. Mol. Biol. Rev. |
|---|
| Clin. Vaccine Immunol. | ALL ASM JOURNALS |
|---|