Polyomavirus JC infects human brain microvascular endothelial cells independent of serotonin receptor 2A
- PMID: 17399760
- PMCID: PMC2034208
- DOI: 10.1016/j.virol.2007.02.018
Polyomavirus JC infects human brain microvascular endothelial cells independent of serotonin receptor 2A
Abstract
Although human polyomavirus JC (JCV) is known to cause progressive multifocal leukoencephalopathy (PML) in immunocompromised individuals, the mechanism by which JCV crosses the blood-brain barrier (BBB) remains unclear. To test our hypothesis that cell-free JCV gains entry into the brain by infecting endothelial cells, we inoculated human brain microvascular endothelial (HBMVE) cells with 50 HAU (1.33+/-0.27 x 10(7) genome copies) of JCV(Mad1) and analyzed the expression of early and late viral genes and proteins by immunocytochemistry, quantitative real-time PCR (qPCR), quantitative real-time reverse transcriptase PCR (qRT-PCR) and immunoprecipitation followed by Western blotting. JCV infected and replicated efficiently in HBMVE cells and produced infectious virions several hundred fold higher than the infecting inoculum. HBMVE cells in vitro did not express serotonin receptor 2A (5HT(2A)R), and 5HT(2A)R blockers did not prevent JCV infection of HBMVE cells. Collectively, our data indicate that the productive in vitro infection of HBMVE cells by JCV is independent of 5HT(2A)R.
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