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Dissolving the cytosolic bacteria in non-immune cells
1Department of Immunology, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100005, China.
Trends in Immunology
|October 13, 2021
Summary
Mammalian non-immune cells control intracellular pathogens using apolipoprotein L3 (APOL3). This protein, induced by interferon-gamma (IFN-γ), offers a new innate defense mechanism against bacterial infections.
Area of Science:
- Innate immunity
- Cellular microbiology
- Host-pathogen interactions
Background:
- Non-immune cells play a role in controlling intracellular pathogens.
- Interferon-gamma (IFN-γ) is a key cytokine in immune responses.
- Understanding host defense mechanisms in non-immune cells is crucial.
Purpose of the Study:
- To identify host factors in non-immune cells that control intracellular pathogens.
- To elucidate new innate immune mechanisms.
Main Methods:
- Genome-wide CRISPR-Cas9 screening was employed.
- Interferon-gamma (IFN-γ) induction was utilized.
- Intracellular bacterial infection models were used.
Main Results:
- Apolipoprotein L3 (APOL3) was identified as a critical host factor.
- APOL3 targets and eliminates intracellular bacteria.
- This process is dependent on IFN-γ induction.
Conclusions:
- APOL3 is a novel host factor mediating innate immunity in non-immune cells.
- A new IFN-γ-dependent defense pathway against intracellular bacteria was revealed.
- This finding expands our understanding of host defense mechanisms.
