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NADPH oxidase in human lung fibroblasts
Gursev S Dhaunsi1, Manjeet Kaur Paintlia, Jaspal Kaur
1Department of Pediatrics, Medical University of South Carolina, Charleston, SC, USA.
Journal of Biomedical Science
|August 19, 2004
Summary
Reactive oxygen species (ROS) are involved in human lung fibroblast response to rhinovirus. This study confirmed p47-phox
Area of Science:
- Immunology
- Cell Biology
- Respiratory Medicine
Background:
- Reactive oxygen species (ROS) are implicated in cellular responses to viral infections.
- NADPH oxidase (NOX) enzymes are key sources of ROS.
- Human lung fibroblasts are relevant models for studying respiratory viral infections.
Purpose of the Study:
- To characterize NADPH oxidase components in human lung fibroblasts.
- To investigate the impact of rhinovirus infection on NADPH oxidase expression.
- To confirm the role of p47-phox in the ROS response to rhinovirus.
Main Methods:
- Characterization of NADPH oxidase components (p47-phox, p67-phox, p22-phox, NOX4, gp91-phox) in lung fibroblasts via expression analysis.
- Rhinovirus challenge to assess changes in protein expression.
- Transfection with antisense nucleotides to p47-phox to evaluate functional impact on oxidant stress and IL-8 production.
Main Results:
- Lung fibroblasts express p47-phox, p67-phox, p22-phox, and NOX4, but not gp91-phox.
- Rhinovirus infection upregulates p67-phox expression.
- Inhibition of p47-phox significantly reduced rhinovirus-induced oxidant stress and IL-8 elaboration.
Conclusions:
- NADPH oxidase components are present in lung fibroblasts, with specific expression patterns.
- Rhinovirus modulates NADPH oxidase activity, contributing to oxidant stress and inflammation (IL-8).
- p47-phox plays a crucial role in the cellular response to rhinovirus infection.