The study, published in the journal Nature, found that the flu virus uses a protein called hemagglutinin (HA) to bind to a receptor on the surface of human cells. This binding triggers a cascade of events that leads to the virus entering the cell and replicating.
The researchers also found that the HA protein undergoes a conformational change after it binds to the receptor. This change exposes a new binding site on the HA protein that allows it to interact with another protein called neuraminidase (NA). NA is an enzyme that helps the virus shed its outer coat and infect new cells.
The researchers believe that this new understanding of how the flu virus hijacks human cells could lead to new treatments for the flu. One potential treatment would be to develop drugs that block the binding of HA to the receptor on the human cell surface. This would prevent the virus from entering the cell and replicating.
Another potential treatment would be to develop drugs that inhibit the conformational change in the HA protein. This would prevent the HA protein from interacting with NA, which would prevent the virus from shedding its outer coat and infecting new cells.
The researchers say that these findings are a significant step forward in our understanding of how the flu virus infects human cells. They believe that this knowledge could lead to the development of new treatments for the flu that are more effective and less toxic than current treatments.
Influenza is a respiratory illness that is caused by influenza viruses. It is spread through contact with an infected person or by inhaling droplets that contain the virus. Symptoms of the flu include fever, chills, muscle aches, headache, sore throat, and cough. In severe cases, the flu can lead to pneumonia, hospitalization, and even death.
