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A High Resolution Method to Monitor Phosphorylation-dependent Activation of IRF3
Published on: January 24, 2016
N-Myc and STAT interactor as a context-dependent switch in innate antiviral immunity
Lin Han1, Xinyao Xu1, Fangfang Zhao1
1Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, China.
Frontiers in Immunology
|July 9, 2026
Summary
N-Myc and STAT interactor (NMI) acts as a versatile regulator in antiviral immunity. Its function as an antiviral or proviral factor depends on context, influencing host defense pathways differently across various infections.
Area of Science:
- Immunology
- Virology
- Molecular Biology
Background:
- N-Myc and STAT interactor (NMI) is recognized for its role in innate antiviral immunity.
- NMI's function is not fixed but context-dependent, influenced by interactions and cellular localization.
Purpose of the Study:
- To elucidate the multifaceted role of NMI in innate antiviral immunity.
- To understand how NMI's interactions and localization dictate its antiviral or proviral activity.
Main Methods:
- Analysis of NMI's role in various viral infection models (RNA viruses, IAV, foamy virus, HCMV).
- Investigation of NMI's interaction partners and signaling pathways (e.g., IRF7, STAT1, IFP35, TRIM21, viral proteins).
- Assessment of NMI's impact on host gene expression and viral replication.
Main Results:
- NMI suppresses type I interferon (IFN-I) signaling in some RNA virus models via NMI-IFP35 complex and IRF7 degradation.
- NMI acts as a host restriction factor in foamy virus infection by binding viral Tas and inhibiting transcription.
- NMI is targeted by human cytomegalovirus (HCMV) via UL23, which interferes with NMI-STAT1/IFN-γ signaling.
- Extracellular NMI and IFP35 can act as damage-associated molecular patterns, amplifying inflammation.
Conclusions:
- NMI functions as a context-dependent molecular switch in innate antiviral immunity, not a fixed effector.
- NMI's antiviral or proviral activity is determined by interacting partners, signaling context, localization, and infection stage.
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