Autophagy gene-dependent intracellular immunity triggered by interferon-γ
Michael R McAllaster1,2, Jaya Bhushan1, Dale R Balce2,3
1Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri, USA.
Mbio
|October 31, 2023
Summary
Interferon-γ (IFNγ) enhances host defenses by regulating autophagy and UFMylation pathways. These mechanisms are crucial for controlling viral and parasitic infections, offering therapeutic targets.
Area of Science:
- Immunology
- Cellular Biology
- Virology
Background:
- Interferon-γ (IFNγ) is vital for immunity against intracellular pathogens.
- Understanding IFNγ-mediated cellular responses can lead to new infection therapies.
- Autophagy and UFMylation pathways are key cellular processes.
Purpose of the Study:
- To investigate the role of autophagy genes in IFNγ-induced host responses.
- To determine the impact of UFMylation pathway components on IFNγ-induced immunity.
- To identify cellular mechanisms supporting IFNγ-mediated pathogen control.
Main Methods:
- Examined the effect of autophagy gene knockout on IFNγ-induced inhibition of murine norovirus replication in mouse cells.
- Assessed the requirement of WIPI2 and GATE-16 for IFNγ-mediated restriction of Toxoplasma gondii in human cells.
- Investigated the impact of UFMylation pathway perturbation on IFNγ-induced norovirus inhibition and ER stress.
Main Results:
- Autophagy genes (Wipi2, Atg9, Gate-16) and ubiquitin ligase genes (Cul3, Klhl9) are essential for IFNγ-induced norovirus inhibition.
- WIPI2 and GATE-16 are required for IFNγ-mediated restriction of Toxoplasma gondii.
- Altering UFMylation pathway components enhanced IFNγ-induced norovirus inhibition by regulating ER stress.
Conclusions:
- Autophagy and UFMylation pathways are critical for IFNγ-induced host defense against intracellular pathogens.
- Modulating these cellular pathways offers a potential strategy for controlling infections.
- Targeting these mechanisms could enhance immune responses to pathogens.
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