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Published on: June 14, 2020
Innate immunity-mediated inflammation and immunopathogenesis in HSV-1-infected encephalitis
Sheng Yang1, Yangkun Shen2, Chunfu Zheng3
1Fujian Key Laboratory of Toxicant and Drug Toxicology, Medical College, Ningde Normal University, Ningde 352100, China.
Current Opinion in Virology
|August 14, 2026
Summary
Herpes simplex virus-1 encephalitis (HSE) outcome depends on brain’s innate immunity, not just viral load. Tailoring treatments to viral control and inflammation is key for better neurological recovery.
Area of Science:
- Neuroimmunology
- Infectious Diseases
- Virology
Background:
- Herpes simplex virus-1 encephalitis (HSE) is a severe CNS infection with significant neurological sequelae despite antiviral treatments.
- Disease severity is influenced by the brain's innate immune response, not solely by viral replication.
- Brain-intrinsic antiviral mechanisms, including TLR-dependent interferon responses and neuron-associated restriction factors, play a crucial role in controlling HSV-1 infection.
Purpose of the Study:
- To discuss HSE as a dynamic immunopathological disorder.
- To highlight the transition of protective innate immunity into pathogenic neuroinflammation.
- To propose stage-specific immune recalibration as a therapeutic strategy.
Main Methods:
- Review of existing literature on HSE pathogenesis and host immune responses.
- Analysis of the interplay between viral control, innate immunity, and neuroinflammation.
- Conceptual framework development for therapeutic interventions.
Main Results:
- Innate immune responses initially restrict HSV-1 but can lead to detrimental neuroinflammation if excessive or unresolved.
- HSV-1 infection can remodel the immune environment, potentially impairing antiviral control.
- A dynamic interplay exists between protective immunity and pathogenic inflammation in HSE.
Conclusions:
- HSE pathogenesis involves a complex immunopathological process where innate immunity can become detrimental.
- Therapeutic strategies should move beyond general immune modulation.
- Stage-specific immune recalibration, considering viral load, immune competence, inflammation, and tissue repair, is proposed for improved HSE management.
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