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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.

Differences in Affinity of Binding of Lymphocytic Choriomeningitis Virus Strains to the Cellular Receptor alpha -Dystroglycan Correlate with Viral Tropism and Disease Kinetics†

Sara C. Smelt,1,* Persephone Borrow,2 Stefan Kunz,1 Wei Cao,3 Antoinette Tishon,1 Hanna Lewicki,1 Kevin P. Campbell,4 and Michael B. A. Oldstone1

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

alpha -Dystroglycan (alpha -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 alpha -DG determines viral tropism and the outcome of infection in mice. To characterize this relationship, we evaluated the interaction between alpha -DG and several LCMV strains, variants, and reassortants. These viruses could be divided into two groups with respect to affinity of binding to alpha -DG, dependence on this protein for cell entry, viral tropism, and disease course. Viruses that exhibited high-affinity binding to alpha -DG displayed a marked dependence on alpha -DG for cell entry and were blocked from infecting mouse 3T6 fibroblasts by 1 to 4 nM soluble alpha -DG. In addition, high-affinity binding to alpha -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 alpha -DG were only partially inhibited from infecting alpha -DG-/- embryonic stem cells and required a concentration of soluble alpha -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 alpha -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.


* Corresponding author. Mailing address: Division of Virology, Department of Neuropharmacology, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, CA 92037. Phone: (858) 784-8737. Fax: (858) 784-9981. E-mail: ssmelt{at}scripps.edu.

dagger Manuscript 13229-NP of the Scripps Research Institute.


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.



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Copyright © 2001 by the American Society for Microbiology. All rights reserved.