Abstract
Subacute encephalomyelitis (SAME) in Lewis rats following infection with a neurotropic measles virus (MV) is associated with a cell-mediated autoimmune response (CMAI) to myelin badic protein (MBP). MBP-selected CD44+ T cell lines both from measles-infected animals as well as from rats challenged with guinea pig MBP (Gp-MBP) had a similar pattern of response in the presence of synthetic peptides to Gp-MBP and specifically responded in vitro only to the encephalitogenic and not the non-encephalitogenic or other control peptides. In primary splenic lymphocyte cultures from SAME animals, however, a low but significant T-cell response was obtained against the non-encephalitogenic peptide S67 (residues 69–81) of the Gp-MBP. Moreover, immunization of MV-infected rats with this peptide induced clinical and histological experimental allergic encephalomyelitis (EAE) in 38% of the animals. The results of the study show that the non-encephalitogenic peptide S67 can be rendered encephalitogenic in rats when an additional stimulus is given in the form of MV infection. The data indicate further that MV infection of the central nervous system (CNS) enhances the susceptibility of the CNS to autoimmune T cell aggression.
Keywords: Measles virus, Myelin basic protein, T cell line, Epitope, Experimental allergic encephalomyelitis, Autoimmunity
References
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