Polyamine depletion inhibits murine and human norovirus infection.

Polyamine depletion significantly inhibits both murine and human norovirus infections, revealing a conserved host dependency factor critical for viral replication.

• Why it matters: Noroviruses cause widespread gastroenteritis, yet effective treatments are limited due to challenges in studying the virus and understanding host interactions, highlighting the need for new therapeutic targets.
• What they did: The study used cellular models and exogenous supplementation to demonstrate that depleting polyamines with DFMO reduces viral protein synthesis and titers for both murine and human noroviruses, with partial rescue by PAs, cholesterol, or PI3-kinase inhibitors.
• The result: Targeting polyamine metabolism with DFMO suppressed norovirus infection, suggesting that PA pathways are promising antiviral targets and supporting further exploration of existing drugs like DFMO for treating chronic infections.