Oxygen: viral friend or foe?
Esther Shuyi Gan1, Eng Eong Ooi2,3,4
1Programme in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore, Singapore. esther.gan@duke-nus.edu.sg.
Virology Journal
|July 29, 2020
Summary
Oxygen levels in tissues significantly impact viral infections. Experiments should mimic in vivo oxygen levels for accurate host and virus response insights.
Area of Science:
- Physiology
- Virology
- Cell Biology
Background:
- Organ and tissue oxygen levels vary based on proximity to the heart's left ventricle.
- Lymph nodes and spleen exhibit lower oxygen levels compared to atmospheric air.
- Cellular oxygen sensing and responses critically influence viral infection outcomes.
Purpose of the Study:
- To review cellular adaptation mechanisms to low oxygen tensions (hypoxia).
- To explore the impact of hypoxia on viral infections.
- To emphasize the importance of incorporating physiological oxygen concentrations in in vitro viral studies.
Main Methods:
- Literature review of cellular hypoxia adaptation.
- Analysis of how varying oxygen levels affect different viruses.
- Discussion of in vitro versus in vivo oxygen tension discrepancies.
Main Results:
- Viruses infecting well-oxygenated organs are less effective in hypoxic conditions.
- Viruses naturally found in low-oxygen organs thrive in hypoxic environments.
- Standard atmospheric conditions in experiments may overlook crucial oxygen-modulated host-pathogen interactions.
Conclusions:
- Cellular responses to oxygen microenvironments significantly alter viral pathogenesis.
- In vitro studies must consider physiological oxygen tensions for accurate viral infection modeling.
- Replicating in vivo oxygen conditions in lab settings is crucial for understanding viral diseases.
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