PMID: 8615010Feb 1, 1996Paper

Sequences within the early and late promoters of archetype JC virus restrict viral DNA replication and infectivity

Virology
A M DanielR J Frisque

Abstract

Two forms of JC virus (JCV) have been isolated from its human host, an archetype found in kidney tissue and urine of nonimmunocompromised individuals and a rearranged type detected in lymphocytes and brain tissue of patients with and without progressive multifocal leukoencephalopathy. To investigate the hypothesis that alterations to the archetype transcriptional control region yield rearranged forms of the virus exhibiting new tissue tropic and pathogenic potentials, attempts were made to propagate archetype JCV in human renal and glial cell cultures. Although rearranged forms of JCV multiplied in these cells, archetype JCV failed to do so. Through the use of chimeric and mutant viral genomes, and a cell line that constitutively expresses viral T protein, we demonstrated that archetype's inactivity relative to that of rearranged forms was due to differences in the promoter-enhancer and not in the protein coding regions or origin of DNA replication. Additional analyses revealed that the absence of a large tandem duplication and the presence of a 23- and a 66-base pair sequence in the archetype transcriptional control region were responsible for this restricted lytic behavior. We discuss the possibility that deletion and duplica...Continue Reading

Citations

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