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Original Article |
Correspondence to: Michael B.A. Oldstone, Division of Virology, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, CA 92037. Tel:858-784 8054 Fax:858-784 9981
Among cells of the immune system, CD11c+ and DEC-205+ splenic dendritic cells primarily express the cellular receptor (
-dystroglycan [
-DG]) for lymphocytic choriomeningitis virus (LCMV). By selection, strains and variants of LCMV that bind
-DG with high affinity are associated with virus replication in the white pulp, show preferential replication in a majority of CD11c+ and DEC-205+ cells, cause immunosuppression, and establish a persistent infection. In contrast, viral strains and variants that bind with low affinity to
-DG are associated with viral replication in the red pulp, display minimal replication in CD11c+ and DEC-205+ cells, and generate a robust anti-LCMV cytotoxic T lymphocyte response that clears the virus infection. Differences in binding affinities can be mapped to a single amino acid change in the viral glycoprotein 1 ligand that binds to
-DG. These findings indicate that receptorvirus interaction on dendritic cells in vivo can be an essential step in the initiation of virus-induced immunosuppression and viral persistence.
Key Words: lymphocytic choriomeningitis virus, CD11c+/DEC-205+ cells, tropism, viral receptor, selection
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