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. 1996 Nov;70(11):8213–8217. doi: 10.1128/jvi.70.11.8213-8217.1996

Role of VP2 amino acid 141 in tropism of Theiler's virus within the central nervous system.

N Jarousse 1, C Martinat 1, S Syan 1, M Brahic 1, A McAllister 1
PMCID: PMC190905  PMID: 8892956

Abstract

Following intracranial inoculation, Theiler's virus causes either an acute encephalitis (strain GDVII) or a chronic demyelinating disease (strain DA). The DA strain sequentially infects the grey matter of the brain, the grey matter of the spinal cord, and, finally, the white matter of the spinal cord, where it persists in glial cells and causes demyelinating lesions. Analysis of the phenotype of recombinant viruses has shown that the viral capsid contains determinants for persistence and demyelination. Our previous studies showed that a Lys at position 141 of the VP2 capsid protein (VP2-141) could render a chimeric virus persistent. We also reported that another recombinant virus, virus R5, migrated from the grey matter of the brain to that of the spinal cord inefficiently and was unable to infect the white matter of the spinal cord. In this article, we report that introducing a Lys at position VP2-141 in virus R5 increases its ability to infect the white matter of the spinal cord. Our results indicate that this amino acid is important for the spread of the virus within the central nervous system.

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Selected References

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