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The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
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Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
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Related Experiment Video

Updated: Jan 7, 2026

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production
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Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production

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GLS4 Induces the Interferon Signaling Pathway During Hepatitis B Virus (HBV) Infection.

Lingzhu Zhao1, Siduo Xu1, Shouhan Yao1

  • 1State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.

Journal of Medical Virology
|January 2, 2026
PubMed
Summary

GLS4, a capsid assembly modulator, activates the RIG-I interferon pathway in hepatitis B virus (HBV)-infected cells and mice. This immune activation offers a potential strategy for functional HBV cure.

Keywords:
GLS4RIG‐Icapsid assembly modulatorhepatitis B virusimmune responseinterferon

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Area of Science:

  • Hepatology
  • Immunology
  • Virology

Background:

  • Chronic hepatitis B (HBV) management requires functional cure strategies.
  • Class A capsid assembly modulators (CAM-As) show therapeutic promise for HBV.
  • Some CAM-As may activate innate immunity, but mechanisms are unclear.

Purpose of the Study:

  • To investigate GLS4's immune activation capacity in vitro and in vivo.
  • To elucidate the mechanisms underlying GLS4-mediated immune response.
  • To assess GLS4's potential in achieving a functional cure for HBV.

Main Methods:

  • RNA-sequencing (RNA-seq) to analyze gene expression.
  • In vitro studies using HBV-expressing hepatocellular carcinoma cell lines.
  • In vivo studies using HBV carrier mouse models and hydrodynamic injection (HDI).

Main Results:

  • GLS4 activated the RIG-I-mediated interferon signaling pathway in HBV-expressing cells and mouse models.
  • Combination therapy with GLS4 and ritonavir increased IFNγ-producing NK and CD8+ T cells.
  • RNA-seq indicated GLS4's role in activating the interferon pathway.

Conclusions:

  • GLS4 activates the interferon signaling pathway in HBV-expressing hepatocytes via a novel mechanism.
  • GLS4 partially restores innate and adaptive immunity in vivo.
  • GLS4 represents a promising therapeutic strategy for functional HBV cure.