[Study on the DNA immunogenicity of fusion and attachment glycoproteins of Nipah virus]

Bing Du Xue Bao. 2008 Jan;24(1):47-52.
[Article in Chinese]

Abstract

The two mammalian codon optimized genes, F and G genes of Nipah virus, were generated by assembly PCR, and inserted into mammalian expression vector pCAGGS under chicken beta-actin promoter to construct pCAGG-NiV-F and pCAGG-NiV-G. Syncytium formation was induced in BHK cells by plasmid pCAGG-NiV-F and pCAGG-NiV-G transfection, which indicate recombination proteins F and G were expressed in BHK cell and possessed good biologic activity. Six-week-old female BALB/c mice were intramuscularly primed with 100 microg pCAGG-NiV-F, pCAGG-NiV-G or pCAGG-NiV-F+ pCAGG-NiV-G respectively, and boosted with same dose after 4 weeks. The sera were collected at 3 weeks post second boost. The serum IgG against Nipah virus F and G proteins was detected by indirect ELISA using recombinant Baculovirus expressed Nipah F and G glycoproteins. The results showed that specific antibodies possessed good sensitivity and specificity. Furthermore, the G and F proteins' specific antibodies could neutralize the infectivity of VSVdeltaG* F/G (the NiV F and G envelope glycoproteins psudotyped recombinant vesicular stomatitis virus expressing green fluorescence protein). And, pCAGG-NiV-G also induced higher titer of neutralizing antibody response than pCAGG-NiV-F did. The result indicates that DAN immunization is an efficient vaccine strategy against Nipah virus.

Publication types

  • English Abstract
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antibodies, Viral / blood
  • Blotting, Western
  • Enzyme-Linked Immunosorbent Assay
  • Female
  • Mice
  • Mice, Inbred BALB C
  • Nipah Virus / immunology*
  • Vaccines, DNA / immunology*
  • Viral Envelope Proteins / genetics*
  • Viral Envelope Proteins / immunology
  • Viral Vaccines / immunology*

Substances

  • Antibodies, Viral
  • F protein, Nipah virus
  • Vaccines, DNA
  • Viral Envelope Proteins
  • Viral Vaccines
  • attachment protein G