Researchers Find H3N2 Needs Rab11B for Cell Entry, While H1N1 Uses a Different Route
Updated
Updated · Fox News · Jun 3
Researchers Find H3N2 Needs Rab11B for Cell Entry, While H1N1 Uses a Different Route
3 articles · Updated · Fox News · Jun 3
Summary
A Journal of Virology study found H3N2 and H1N1 influenza A viruses do not enter human cells the same way, overturning the assumption that major flu strains share one entry mechanism.
Rab11B depletion blocked H3N2 from entering human lung cells, while H1N1 was unaffected, after researchers unexpectedly spotted the pathway during experiments on viral RNA transport and replication.
The team used H1N1 and H3N2 samples isolated from patients’ nasal passages in 2022 and says the strain-specific entry pathway could point to drugs that stop flu from spreading cell to cell.
Current flu tests still do not distinguish between the two common strains, and treatment remains the same for both, underscoring the need for more targeted therapies.
The findings come from isolated-cell experiments, so researchers still need to test whether blocking Rab11B is safe and effective in the human respiratory system.
To defeat the flu, should we target the invading virus or disable the cellular pathways it hijacks?
Amid a severe flu season, can a breakthrough discovery survive the research funding crisis it was born from?
If accidental discoveries are key to fighting viruses, how can we systematically fund scientific curiosity and serendipity?
Discovery of Rab11B’s Essential Role in H3N2 Influenza Entry Opens Door to Strain-Specific Antivirals
Overview
Recent research led by Emily Bruce's team uncovered that H3N2 and H1N1 influenza A viruses use different ways to enter human cells. The key finding is that H3N2 needs a specific host protein, Rab11B, to infect cells, while H1N1 does not. This discovery challenges the old belief that all influenza A viruses share the same entry method. Identifying Rab11B as essential for H3N2 opens new possibilities for targeted treatments, as future therapies could focus on blocking this protein to stop H3N2 infections without affecting other flu strains.