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Pubmed ID :29932215
Publication Date : //

Establishment of COS-JC cells persistently producing archetype JC polyomavirus.


JC polyomavirus (JCPyV) is the causative agent of progressive multifocal leukoencephalopathy (PML), a demyelinating disease of the central nervous system in immunocompromised patients. Archetype JCPyV circulates in the human population. There have been several reports of archetype JCPyV replication in cultured cells, in which propagation was not enough to produce high titers of archetype JCPyV. In this study, we carried out cultivation of the transfected cells with archetype JCPyV DNA MY for more than two months to establish COS-7 cells (designated COS-JC cells) persistently producing archetype JCPyV. Moreover, JCPyV derived from COS-JC cells was characterized by analyzing the viral propagation, size of the viral genome, amount of viral DNA, production of viral protein, and structure of the non-coding control region (NCCR). Southern blotting using a digoxigenin-labeled JCPyV probe showed two different sizes of the JCPyV genome in COS-JC cells. For molecular cloning, four of five clones showed a decrease in the size of complete JCPyV genome. Especially, clone No.10 was generated the large deletion within the Large T antigen. On the other hand, the archetype structure of the NCCR was maintained in COS-JC cells, although a few point mutations occurred. Quantitative PCR analysis of viral DNA in COS-JC cells indicated that a high copy number of archetype JCPyV DNA was replicated in COS-JC cells. These findings suggest that COS-JC cells could efficiently propagate archetype JCPyV MY and offer a useful tool to study persistent infection of archetype JCPyV in a kidney-derived system.

Authors : Nukuzuma Souichi , Nukuzuma Chiyoko , Kameoka Masanori , Sugiura Shigeki , Nakamichi Kazuo , Tasaki Takafumi , Hidaka Koushi , Takegami Tsutomu ,

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