Expression of viral and myelin gene transcripts in a murine CNS demyelinating disease caused by a coronavirus.

Glia
C A JordanM Dubois-Dalcq

Abstract

C57BI/6N mice develop a CNS demyelinating disease when inoculated intracranially at 4 weeks of age with the A59 strain of mouse hepatitis virus (MHV-A59). In order to explore the virus-host interactions, the histological features of the demyelinating disease were correlated with the spatial and temporal distribution of viral transcripts and the expression of oligodendrocyte-specific genes (myelin basic protein, proteolipid protein, myelin-associated glycoprotein, and 2',3' cyclic nucleotide 3'-phosphohydrolase) in the spinal cord of diseased mice. Three distinct phases in the disease were identified. In the first phase, 1 week postinfection (1 WPI), virus replication was widespread in both gray and white matter but was preferentially occurring in glial cells. In the ventral and dorsal root zones where viral transcripts were most abundant, all myelin gene transcripts were decreased before demyelination was seen. During the second phase of the disease (2-3 WPI), viral transcripts decreased in abundance and became restricted to the white matter. Numerous demyelinating lesions were observed and were characterized by inflammatory cells, paucity of oligodendrocytes, and a profound decrease of all myelin gene transcripts. In the third...Continue Reading

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Citations

Dec 1, 1990·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·M Dubois-Dalcq, R Armstrong
Sep 11, 2001·Journal of Neuroscience Research·K IshiiK Uyemura
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