Effects of mumps virus nucleocapsid protein on the viral replication and apoptosis in VeroE6 cells

Sang Hyun Kim, Ki Joon Song

Research output: Contribution to journalArticlepeer-review


Apoptosis, as a part of the natural defense mechanisms that protect against viral infection, plays a vital role in the pathogenic mechanisms. It also plays a key role in the pathogenesis of diseases including many viral diseases. Mechanisms of virus-induced apoptosis are not completely understood because of the complexity of the underlying biochemical cascades and all of the participating host factors. Mumps virus belongs to the genus Rubulavirus in the family Paramyxoviridae. It contains single stranded RNA genome with negative polarity. It was observed that mumps virus induced apoptosis in VeroE6 cells, and adsorption and penetration of mumps virus to cell membrane alone were not sufficient for the induction of cell death. When mumps virus was superinfected onto nucleocapsid protein (NP) expressing VeroE6 cells, cell viability and facterial titer were maintained until 13 and 12 day, respectively. The levels of p53, Bax, and Bcl-2 were increased in NP-expressing VeroE6 cells, and the increase in Bax, and Bcl-2 was outstanding. It was observed that NP protein did not directly affect the efficiency of the infection of mumps virus in NP-expressing VeroE6 cells. The levels of p53, and Bax were decreased in both mock-infected VeroE6 cells and NP-expressing VeroE6 cells infected with mumps virus. However, the Bcl-2 level was little affected by the virus infection.

Original languageEnglish
Pages (from-to)193-201
Number of pages9
JournalJournal of Bacteriology and Virology
Issue number3
Publication statusPublished - 2003


  • Apoptosis
  • Mumps virus
  • Nucleocapsid (NP)

ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Virology

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