4.6 Article

Epstein-Barr Virus Nuclear Antigen 1 Replication and Segregation Functions in Nasopharyngeal Carcinoma Cell Lines

期刊

JOURNAL OF VIROLOGY
卷 85, 期 19, 页码 10425-10430

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AMER SOC MICROBIOLOGY
DOI: 10.1128/JVI.05293-11

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  1. Canadian Institutes of Health Research (CIHR) [12477]
  2. CIHR Frederick Banting
  3. Charles Best Canada Graduate Scholarships
  4. Canada Research Chairs program

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Nasopharyngeal carcinomas (NPC) are usually Epstein-Barr virus (EBV) positive, but, with the exception of C666-1 cells, these cells lose the EBV genomes when grown in culture. Maintenance of EBV requires the viral EBV nuclear antigen 1 (EBNA1) protein, which ensures the replication and mitotic segregation of the genomes through interactions with OriP. Here we compare the abilities of C666-1 and NPC cells that have lost EBV genomes to replicate and segregate OriP plasmids. We found that either cell line can replicate and maintain OriP plasmids for extended periods under conditions where low levels of EBNA1 are expressed but that high EBNA1 levels selectively interfered with mitotic segregation.

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