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Glycoprotein-C-gene-deleted recombinant infectious laryngotracheitis virus expressing a genotype VII Newcastle disease virus fusion protein protects against virulent infectious laryngotracheitis virus and Newcastle disease virus
- Source :
- Veterinary Microbiology. 250:108835
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- To develop an alternative vectored vaccine against both Newcastle disease virus (NDV) and infectious laryngotracheitis virus (ILTV), the glycoprotein C (gC) gene was first deleted from an avirulent ILTV. Based on this gC-deleted ILTV mutant, a recombinant ILTV expressing the fusion protein (F) of a genotype VII NDV (designated ILTV-ΔgC-F) was then constructed. Expression of the NDV F protein in ILTV-ΔgC-F-infected LMH cells was examined with an immunofluorescence assay and western blotting. The F gene was stably maintained in the genome of ILTV-ΔgC-F and the F protein was stably expressed. Compared with the parental virus, ILTV-ΔgC-F demonstrated an increased penetration capacity in vitro, and an increased replication rate in vitro and in vivo. Both the parental virus and ILTV-ΔgC-F were avirulent in chickens. Vaccination of specific-pathogen-free chickens with ILTV-ΔgC-F induced ILTV-specific antibodies, detected with an enzyme-linked immunosorbent assay (ELISA), and provided complete clinical protection against virulent ILTV, although viral shedding and replication were detected in the respiratory tract in the early stage of infection in a very small number of birds. Vaccination with ILTV-ΔgC-F also provided significant protection against challenge with a virulent genotype VII NDV, although the level of NDV-specific antibodies detected with an ELISA was low. Notably, the numbers of birds that were positive for the virulent genotype VII NDV and the replication of the challenge virus NDV in selected target tissues were significantly lower in the ILTV-ΔgC-F-vaccinated chickens than in the control birds. Our results indicate that ILTV-ΔgC-F has potential utility as a bivalent candidate vaccine against both infectious laryngotracheitis and Newcastle disease.
- Subjects :
- Male
Genotype
Newcastle Disease
viruses
Newcastle disease virus
Virulence
Biology
Antibodies, Viral
Microbiology
Newcastle disease
Virus
Cell Line
03 medical and health sciences
Herpesvirus 1, Gallid
Viral Envelope Proteins
Animals
Viral shedding
Poultry Diseases
030304 developmental biology
0303 health sciences
General Veterinary
030306 microbiology
Viral Vaccines
Herpesviridae Infections
General Medicine
biology.organism_classification
Fusion protein
Virology
Recombinant Proteins
Specific Pathogen-Free Organisms
Vaccination
biology.protein
Antibody
Chickens
Viral Fusion Proteins
Gene Deletion
Subjects
Details
- ISSN :
- 03781135
- Volume :
- 250
- Database :
- OpenAIRE
- Journal :
- Veterinary Microbiology
- Accession number :
- edsair.doi.dedup.....3acbb5b6745da142b1f040a338f02abc