Related Experiment Videos
[Comparative study of the polypeptide composition of influenza A viruses sensitive and resistant to remantadine]
Abstract:
The polypeptide composition of influenza A FPV (Hav1N1) and A/Texas/1/77 (H3N2) viruses which had acquired resistance to remantadine after serial passages in cell cultures in the presence of the drug was studied. It was found that in parallel with the acquired resistance to remantadine the molecular weight of the heavy chain of hemagglutinin changed only in the course of cell culture passages. The influenza A/Texas/1/77 virus passaged in chick embryos in the presence of remantadine exhibited no differences in the electrophoretic mobility of hemagglutinin between the sensitive and resistant variants. Remantadine is assumed to be an additional factor which influenza virus has to overcome in the process of adaptation to cell cultures.
Insights
Influenza A virus resistance to remantadine involves changes in hemagglutinin
Area of Science:
- Virology
- Molecular Biology
- Drug Resistance Studies
Context:
- Influenza A viruses are significant human pathogens.
- Antiviral drugs like remantadine are crucial for treatment.
- Understanding viral adaptation mechanisms is essential for public health.
Purpose:
- To investigate the molecular changes in influenza A viruses upon acquiring remantadine resistance.
- To compare the effects of remantadine on viral adaptation in cell cultures versus chick embryos.
Summary:
- Studied polypeptide composition of remantadine-resistant influenza A (Hav1N1) and (H3N2) viruses.
- Observed changes in hemagglutinin heavy chain molecular weight during cell culture adaptation.
- No significant electrophoretic mobility differences in hemagglutinin were found in chick embryo passages.
Impact:
- Remantadine resistance in influenza A virus is linked to hemagglutinin alterations.
- Viral adaptation to cell cultures involves overcoming drug-induced selective pressures.
- Findings contribute to understanding antiviral resistance and viral evolution.