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Interferon-β Modulates Early Viral Replication Kinetics and Innate Responses to Non-Fatal Alphavirus
Benjamin H Nguyen1, Elise Stanley1, Victoria K Baxter2
1W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA.
Pathogens (Basel, Switzerland)
|May 4, 2026
Summary
Type I interferons (IFNs) are crucial for antiviral immunity. This study shows that interferon-beta (IFNβ) specifically helps control alphavirus replication in the central nervous system (CNS), delaying severe disease.
Area of Science:
- Neuroimmunology
- Virology
- Infectious Diseases
Background:
- Alphaviruses cause CNS infections like encephalomyelitis.
- Type I interferons (IFNs), including IFNα and IFNβ, are vital innate antiviral defenses.
- The CNS has a specialized immune response to protect neurons.
Purpose of the Study:
- To investigate the specific role of IFNβ in recovery from alphavirus-induced encephalomyelitis.
- To understand how IFNβ influences the early immune response and viral replication in the CNS.
Main Methods:
- Utilized a mouse model of Sindbis virus (SINV) infection.
- Compared disease progression and immune responses in wildtype and IFNβ-deficient (Ifnb-/-) mice.
Main Results:
- IFNβ-deficient mice exhibited earlier onset and more severe neurological disease.
- Increased early viral replication was observed in IFNβ-deficient mice.
- Reduced microgliosis but elevated inflammatory cytokine/chemokine levels and altered immune cell recruitment occurred in IFNβ-deficient mice.
Conclusions:
- IFNβ plays a critical role in modulating the early immune response to alphavirus infection in the CNS.
- IFNβ is essential for restricting early viral replication and delaying disease onset.
- These findings highlight IFNβ's importance in neuroprotective antiviral immunity.
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