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Genetic recombination between temperature-sensitive and wild-type influenza A virus strains
Acta Virologica
|January 1, 1983
Summary
Influenza virus genetic recombination occurs frequently, involving the exchange of RNA segments between different strains. This study examined the reassortment of proteins in influenza virus A/WSN (H0N1) and A/Aichi/2/68 (H3N2) after genetic crossing.
Area of Science:
- Virology
- Molecular Biology
- Genetics
Background:
- Influenza viruses are known for their genetic variability.
- Understanding influenza virus recombination is crucial for predicting pandemic potential.
Purpose of the Study:
- To investigate the frequency and nature of genetic recombination in influenza viruses.
- To determine the origin of viral proteins in reassortant influenza virus clones.
Main Methods:
- Genetic crossing of temperature-sensitive (ts) mutant influenza virus A/WSN (H0N1) with wild-type A/Aichi/2/68 (H3N2).
- Isolation and characterization of twelve reassortant influenza virus clones.
- Analysis of viral polypeptides using SDS-polyacrylamide gel electrophoresis (PAGE).
Main Results:
- High-frequency recombination was observed for major viral proteins.
- Reassortant clones exhibited a mix of proteins derived from both parent viruses.
- The findings support the model of influenza virus recombination as RNA segment exchange.
Conclusions:
- Influenza virus genetic reassortment is a frequent event.
- Recombination involves the exchange of entire RNA segments between parent viruses.
- This mechanism contributes significantly to influenza virus evolution and diversity.