Abstract

Patchy demyelination throughout the central nervous system, including the optic nerve, is known to occur following infection with Semliki Forest virus (SFV) in Swiss/A 2G mice. An increase in the fast axonal transport of protein in optic nerves occurred before they showed signs of demyelination in Swiss/A 2G mice, heterozygous nude mice and nude mice reconstituted with T-cells. SFV infection, however, caused neither an increase in the fast axonal transport of protein, nor optic nerve demyelination in T-cell-deficient nude mice. Thus, the increase in both axonal transport and demyelination following SFV infection appear to be T-cell-mediated events, rather than direct effects of the virus.

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