Resumo

SILVA PAREDES, Carlos; BELLO, Luis; LINARES, Sergia  e  BERMUDEZ, Valmore. Increase of malondialdehido and nitric oxide in COPD patients. AVFT [online]. 2017, vol.36, n.2, pp.33-39. ISSN 0798-0264.

Introduction: Chronic Obstructive Pulmonary Disease (COPD) is an entity characterized by the persistence of respiratory symptoms and airflow limitation due to abnormalities in the airway and / or alveoli mainly due to smoking, as well as exposure to biomass, Harmful gases, vapors, environmental air pollution, among other factors. Its pathophysiology is based on a chronic inflammatory process and oxidative stress that condition the degeneration and remodeling of the extracellular matrix. Materials and methods: An exploratory, descriptive, cross - sectional study was performed, whose selection of individuals was through an intentional non - probabilistic sampling. Three working groups were established: patients with stable COPD, exacerbated COPD and control group (healthy individuals with no history of smoking). Patients older than 40 years with a diagnosis of COPD confirmed by clinical and spirometric criteria, who attended the consultation of Pneumonology or the Respiratory Care Unit of the Hospital General del Sur “Dr Pedro Iturbe”, Maracaibo - Estado. Zulia, in the period from September 2012 to May 2013. The variables were expressed in absolute and relative measures (qualitative variables), and arithmetic mean ± standard deviation (quantitative variables), and statistical comparisons were made using Student’s Ttest (2 groups) or ANOVA with Bonferroni post-hoc test More groups), as well as Pearson’s correlation test. A value of p <0.05 was considered statistically significant. Results: General sample consisting of 90 patients: 45 male and 45 female. Mean MDA of 0.99 ± 0.44 mM, showing statistically significant differences between Control Group (0.85 ± 0.34 mM) vs Stable EPOC Group (1.16 ± 0.59 mM). Mean Nitric Oxide of 41.87 ± 6.34 mM evidenced statistically significant differences between Control Group (37.17 ± 2.65) vs Stable COP (42.93 ± 6.37 mM) and Control Group vs exacerbated COP (45, 50 ± 6.15 mM). Conclusions: The oxidative profile in patients with COPD is elevated, with NO being the major that is related to the smoking habit and the time of evolution of the disease.

Palavras-chave : Chronic Obstructive Pulmonary Disease; Malondialdehyde; Nitric Oxide; oxidative profile.

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