Abstract
Polyomavirus JC (JCPyV) reactivation and development of progressive multifocal leukoencephalopathy is a health concern in multiple sclerosis patients under natalizumab therapy. Here, the JCPyV microRNA-J1-3p and microRNA-J1-5p expressions and genomic variability were investigated in blood and urine samples of multiple sclerosis patients before and under natalizumab therapy and in healthy controls. The two JCPyV microRNAs were detected in the JCPyV-DNA-positive peripheral blood mononuclear cell samples and in the exosomes derived from plasma and urine obtained from JCPyV-DNA-positive and JCPyV-DNA-negative patients. In particular, the increased JCPyV microRNA expression in samples of multiple sclerosis patients under natalizumab therapy was consistent with the high JCPyV-DNA positivity observed in these samples. Moreover, JCPyV microRNA genomic region showed few nucleotide differences in samples obtained from blood and urine of multiple sclerosis patients and healthy controls. Overall, these data suggest a potential role of the JCPyV microRNA expression in counteracting the viral reactivation to maintain JCPyV asymptomatic persistence in the host.
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The work was supported by grants from the Fondazione “Istituto di Ricerca Virologica Oretta Bartolomei Corsi” Florence, Italy.
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All authors declare that that they have no conflict of interest.
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Giovannelli, I., Martelli, F., Repice, A. et al. Detection of JCPyV microRNA in blood and urine samples of multiple sclerosis patients under natalizumab therapy. J. Neurovirol. 21, 666–670 (2015). https://doi.org/10.1007/s13365-015-0325-3
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DOI: https://doi.org/10.1007/s13365-015-0325-3