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Increased activation of p38 MAPK in COPD
1Dept of Experimental and Clinical Medicine, University Magna Graecia of Catanzaro, Catanzaro, Italy.
The European Respiratory Journal
|October 26, 2007
Summary
Activation of the p38 mitogen-activated protein kinases (MAPKs) pathway is increased in chronic obstructive pulmonary disease (COPD) lungs. This suggests p38 MAPK may be a therapeutic target for COPD treatment.
Area of Science:
- Pulmonary Medicine
- Molecular Biology
- Cellular Signaling
Background:
- Chronic obstructive pulmonary disease (COPD) pathogenesis involves inflammation, oxidative stress, and apoptosis.
- These processes may be mediated by the p38 subgroup of mitogen-activated protein kinases (MAPKs).
Purpose of the Study:
- To evaluate the expression of the active, phosphorylated form of p38 MAPK (phospho-p38) in the lungs of COPD patients.
- To investigate the role of p38 MAPK activation in COPD pathogenesis.
Main Methods:
- Immunohistochemistry was used to quantify phospho-p38+ cells in alveolar spaces and walls from COPD patients and controls.
- Western blot analysis assessed phospho-p38 and total p38alpha isoform expression in alveolar macrophages.
Main Results:
- Phospho-p38+ cells in alveolar walls and phospho-p38+ alveolar macrophages were elevated in COPD patients compared to controls.
- Increased phospho-p38 levels inversely correlated with lung function parameters (FEV1 and FEV1/FVC).
- Western blot confirmed increased phosphorylated p38, but not total p38alpha, in alveolar macrophages of COPD patients.
Conclusions:
- Activation of the p38 MAPK pathway is implicated in COPD pathogenesis.
- The findings suggest that p38 MAPK is a potential pharmacological target for therapeutic interventions in COPD.
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