Related Experiment Video
Updated: May 31, 2026

A High Resolution Method to Monitor Phosphorylation-dependent Activation of IRF3
Published on: January 24, 2016
PKR-dependent mechanisms of interferon-α for inhibiting hepatitis B virus replication
Il-Hyun Park1, Kyung-Won Baek, Eun-Young Cho
1School of Life Sciences and Biotechnology, Korea University, Seoul 136-701, Korea.
Abstract:
Interferon-α (IFN-α) inhibits the replication of hepatitis B virus (HBV) in vivo and in vitro, but the molecular mechanism of this inhibition has been elusive. We found that while HBV replication in transfected human hepatoma Huh-7 cell was severely inhibited by IFN-α treatment as reported previously, this inhibition was markedly impaired in the cell in which the expression of IFN-inducible, double-stranded RNA-dependent protein kinase (PKR) was stably and specifically suppressed through RNA-interference. Intracellular level of viral capsids was down-regulated likewise in a PKR-dependent manner, whereas that of HBV transcripts including the viral RNA pregenome was not affected by IFN-α treatment. Ectopic expression of PKR also resulted in the reduction of viral capsids with concomitant increase of phosphorylated eIF2α. These results suggested that PKR functions as a key mediator of IFN-α in opposing HBV replication, most likely through the inhibition of protein synthesis.
More Related Videos
Related Concept Videos
Inhibitors of Viral Protein Synthesis
Inhibitors Of Virion Release
Hepatitis
Immune Response Against Viral Pathogens
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Viruses with RNA Genomes
NF-κB-dependent Signaling Pathway
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...

