Related Experiment Videos
PRRSV, the virus
1Department of Virology, Institute for animal science and health (ID-DLO), Lelystad, The Netherlands. J.J.M.Meulenberg@id.dlo.nl
Abstract:
Porcine reproductive and respiratory syndrome virus (PRRSV) is a positive-strand RNA virus that belongs to the Arteriviridae family. PRRSV grows in primary alveolar macrophages and in monkey kidney cell lines. The genomic RNA is approximately 15 kb. The genome encodes the RNA replicase (ORF1a and ORF1b), the glycoproteins GP2 to GP5, the integral membrane protein M, and the nucleocapsid protein N (ORFs 2 to 7). A comparison of nucleotide sequences of different strains indicates that European and North American strains represent two distinct antigenic types. Various PRRSV-specific monoclonal antibodies and recombinant structural proteins have been produced. Well-defined PRRSV mutants can be generated with the recently developed infectious cDNA clone of PRRSV.
Insights
Porcine reproductive and respiratory syndrome virus (PRRSV) is a significant swine pathogen. Research has characterized its genome, identified distinct European and North American strains, and developed tools for studying PRRSV.
Area of Science:
- Virology
- Molecular Biology
- Immunology
Background:
- Porcine reproductive and respiratory syndrome virus (PRRSV) is a major cause of economic loss in the swine industry.
- PRRSV is a positive-strand RNA virus within the Arteriviridae family.
- The virus infects primary alveolar macrophages and monkey kidney cell lines.
Purpose of the Study:
- To characterize the genomic structure and genetic diversity of PRRSV.
- To describe the development of tools for PRRSV research, including monoclonal antibodies and recombinant proteins.
- To highlight the creation of an infectious cDNA clone for PRRSV mutant generation.
Main Methods:
- Genomic RNA sequencing and comparison of different PRRSV strains.
- Production of PRRSV-specific monoclonal antibodies.
- Development of recombinant structural proteins.
- Generation of PRRSV mutants using an infectious cDNA clone.
Main Results:
- The PRRSV genome is approximately 15 kb and encodes key viral proteins (replicase, glycoproteins, M, and N).
- Nucleotide sequence comparison revealed two distinct antigenic types: European and North American strains.
- Monoclonal antibodies and recombinant proteins specific to PRRSV have been successfully produced.
- A functional infectious cDNA clone enables the generation of well-defined PRRSV mutants.
Conclusions:
- PRRSV possesses a well-defined genomic structure with distinct antigenic variants.
- The availability of PRRSV-specific reagents and genetic tools facilitates further research into viral pathogenesis and vaccine development.
- The infectious cDNA clone is a powerful tool for reverse genetics studies of PRRSV.