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  • Title: [New approach for JC virus detection and its application for PML diagnosis].
    Author: Nakamichi K, Lim CK, Saijo M.
    Journal: Rinsho Shinkeigaku; 2014; 54(12):1028-30. PubMed ID: 25672699.
    Abstract:
    Progressive multifocal leukoencephalopathy (PML) is a rare but fatal demyelinating disease of the central nervous system (CNS) caused by JC virus (JCV). The current diagnostic standard for PML is real-time PCR testing of extracted DNA for assessing the presence of JCV DNA in cerebrospinal fluid (CSF). However, because of its sensitivity, real-time PCR assay for JCV testing has a risk of false-positive results due to DNA contamination. JCV isolates recovered from the brain or CSF of PML patients contain hypervariable mutations within the non-coding control region (NCCR) of the viral genome. In our laboratory, the high-resolution melting (HRM) assay was developed to distinguish the patient-dependent NCCR patterns of JCV DNA variants in clinical specimens. The HRM-based scanning of NCCR serves as a quick and convenient technique for comparing the mutational patterns of JCV variants in clinical samples and for the confirmation of PML diagnosis when combined with routine real-time PCR testing.
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