Construction and characterization of recombinant porcine adenovirus serotype 5 expressing the transmissible gastroenteritis virus spike gene

T. Tuboly, É Nagy

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40 Citations (Scopus)

Abstract

Five recombinant porcine adenoviruses of serotype 5 (PAdV-5) carrying the full-length or the 5′ 2.2 kb half of the transmissible gastroenteritis virus (TGEV) spike (S) gene were generated by homologous recombination in E. coli strain BJ5183 cells and subsequent transfection of swine testicle cells. The foreign genes were inserted into the E3 region of PAdV-5. One recombinant virus had no deletion in the E3 region, whereas a 1.2 kb fragment was removed from the E3 region in the remainder of the recombinant viruses. One stable construct with a 4.4 kb insertion had a genome size of 109.6% of the wild-type genome, the largest reported for any recombinant adenovirus. Only those viruses that carried the S gene in the left to right orientation expressed the S gene. Three recombinant viruses were tested by oral immunization of pigs and both antibody response and virus shedding were monitored. None of the pigs showed clinical signs and the virus was recovered from rectal swabs until 6-7 days post-infection. Viruses expressing the S gene induced TGEV- and PAdV-5-specific virus-neutralizing antibodies. Moreover, TGEV-specific secretory IgA was detected in the small intestine and in the lungs of the immunized animals.

Original languageEnglish
Pages (from-to)183-190
Number of pages8
JournalJournal of General Virology
Volume82
Issue number1
Publication statusPublished - 2001

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Porcine Adenoviruses
Transmissible gastroenteritis virus
Viruses
Genes
Swine
Virus Shedding
Genome Size
Secretory Immunoglobulin A
Homologous Recombination
Serogroup
Neutralizing Antibodies
Adenoviridae
Small Intestine
Antibody Formation
Transfection
Testis
Immunization
Genome
Escherichia coli
Lung

ASJC Scopus subject areas

  • Virology
  • Immunology

Cite this

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abstract = "Five recombinant porcine adenoviruses of serotype 5 (PAdV-5) carrying the full-length or the 5′ 2.2 kb half of the transmissible gastroenteritis virus (TGEV) spike (S) gene were generated by homologous recombination in E. coli strain BJ5183 cells and subsequent transfection of swine testicle cells. The foreign genes were inserted into the E3 region of PAdV-5. One recombinant virus had no deletion in the E3 region, whereas a 1.2 kb fragment was removed from the E3 region in the remainder of the recombinant viruses. One stable construct with a 4.4 kb insertion had a genome size of 109.6{\%} of the wild-type genome, the largest reported for any recombinant adenovirus. Only those viruses that carried the S gene in the left to right orientation expressed the S gene. Three recombinant viruses were tested by oral immunization of pigs and both antibody response and virus shedding were monitored. None of the pigs showed clinical signs and the virus was recovered from rectal swabs until 6-7 days post-infection. Viruses expressing the S gene induced TGEV- and PAdV-5-specific virus-neutralizing antibodies. Moreover, TGEV-specific secretory IgA was detected in the small intestine and in the lungs of the immunized animals.",
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