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Malondialdehyde in Exhaled Breath Condensate As a Marker of Oxidative Stress in Different Pulmonary Diseases

Overview
Publisher Wiley
Specialties Biochemistry
Pathology
Date 2011 Jul 21
PMID 21772668
Citations 61
Authors
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Abstract

Background: Oxidative stress plays a role in the pathogenesis of many chronic inflammatory lung diseases. Exhaled breath condensate (EBC) collection is a noninvasive method to investigate pulmonary oxidative stress biomarkers such as malondialdehyde (MDA).

Subjects And Methods: We measured MDA levels in EBC in a large number of patients (N = 194) with respiratory diseases: asthma (N = 64), bronchiectasis (BE, N = 19), chronic obstructive pulmonary disease (COPD, N = 73), idiopathic pulmonary fibrosis (IPF, N = 38). Fourteen healthy nonsmoking subjects were included as controls.

Results: Excluding IPF subjects, MDA levels were significantly higher in all disease groups than in control group. MDA was significantly higher in COPD than asthmatic and BE subjects. Among asthmatics, corticosteroids-treated subjects had lower MDA levels than untreated subjects. COPD subjects showed an inverse correlation between MDA concentrations and FEV(1)% (rho:  -0.24, P < .05).

Conclusions: EBC-MDA is increased in subjects with chronic airway disorders, particularly in COPD, and it is related to FEV(1) reduction.

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