Accidental Discovery Offers New Flu Prevention Strategies
An unexpected laboratory breakthrough has introduced innovative ways to combat the flu. While examining influenza replication, scientists discovered that various flu strains employ distinct techniques to penetrate human cells, as reported by SWNS.
By focusing on the specific molecules essential to these viruses, researchers found they could prevent the virus from entering new cells and stop replication altogether.
Principal investigator Dr. Emily Bruce from the University of Vermont’s Larner College of Medicine expressed that these insights reveal a promising path for creating better preventive medications.
Investigations revealed different flu strains utilize unique strategies to invade human cells. Though multiple flu strains cause infections, H1N1 and H3N2 influenza A viruses are most prevalent. Current tests do not distinguish between them, and treatments remain identical for both.
Dr. Bruce underscored the need for superior medications to prevent the virus from spreading cell to cell. As he explained, sickness occurs when a virus multiplies in multiple cells, not while it’s confined to one.
The newly published study in The Journal of Virology aimed to trace the transportation of viral RNA within cells to create new viral particles. Researchers employed H1N1 and H3N2 samples from nasal passages of positive patients in 2022.
During their investigation, they accidentally discovered a cellular pathway that inhibited the virus from entering lung cells. Their findings showed that depletion of a particular human protein, Rab11B, thwarted H3N2 viruses’ entry into lung cells, while H1N1 remained unaffected.
The study mapped this deficiency using reverse genetics, unveiling a new H3N2-specific function for Rab11B during viral entry. This finding challenged previous scientific beliefs that all flu viruses infiltrated cells similarly.
Dr. Bruce likened viruses to distinct pirates commandeering ships, each using unique approaches.
Although they identified a key pathway for viral entry, researchers acknowledged the study was conducted with isolated cells. More research is necessary to confirm if protein blockage is safe and effective in a live human respiratory system.
Dr. Bruce and the team plan to explore further whether Rab11B-dependency is fundamental to H3N2, or specific to contemporary flu strains.