STING-NF-κB signaling builds an influenza spillover barrier.

Summary

This mechanistic study identifies human STING as a barrier to avian influenza A virus transmission by activating NF-κB and downstream effector genes via a defined STING domain. The work proposes a host-intrinsic antiviral module that limits spillover potential and points to NF-κB-stimulated genes as mediators.

Key Findings

• Human STING functions as a transmission barrier against avian influenza A viruses.
• STING activates NF-κB and downstream NF-κB–stimulated genes via a specific STING domain.
• NF-κB–induced effectors are implicated as mediators of the anti-spillover activity.

Clinical Implications

While preclinical, these data suggest that enhancing STING–NF-κB signaling or leveraging key NF-κB-stimulated effectors could inform host-directed countermeasures to reduce zoonotic influenza risk.

Limitations

• Preclinical mechanistic work; details of in vivo validation and specific effector genes are not provided in the abstract
• Translational applicability and safety of pathway modulation remain to be established

Future Directions

Define the specific NF-κB–stimulated effectors mediating restriction, validate the barrier in relevant in vivo models, and explore pharmacologic or genetic strategies to potentiate STING–NF-κB signaling safely.