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. 1997 Apr;71(4):3336–3340. doi: 10.1128/jvi.71.4.3336-3340.1997

Role of macrophages during Theiler's virus infection.

C P Rossi 1, M Delcroix 1, I Huitinga 1, A McAllister 1, N van Rooijen 1, E Claassen 1, M Brahic 1
PMCID: PMC191475  PMID: 9060706

Abstract

Theiler's virus, a murine picornavirus, causes a persistent infection of the central nervous system with chronic inflammation and primary demyelination. We examined the nature of infected cells at different times postinoculation (p.i.) with a combined immunocytochemistry-in situ hybridization assay. The virus was found in the gray matter of the brain, mostly in neurons, during the first week p.i. During the following weeks, the virus was present in the spinal cord, first in the gray and white matter, then exclusively in the white matter. Approximately 10% of infected cells were astrocytes at any time during the study. Infected oligodendrocytes were first noticed on day 14 p.i. and amounted to approximately 6% of infected cells. The number of infected macrophages increased with time and reached a plateau by day 21 p.i., when at least 45% of infected cells were macrophages. The role of blood-borne macrophages during infection was studied by depleting them with mannosylated liposomes containing dichloromethylene diphosphonate. The virus did not persist in the majority of the mice treated with liposomes. These mice showed only minimal mononuclear cell infiltration and no demyelination.

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Selected References

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