STUDY OF OXIDATIVE / NITROSATIVE STRESS, NON-ENZYMATIC ANTIOXIDANTS AND MARKERS OF AIRFLOW OBSTRUCTION (FEV1 % PREDICTED) IN CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD) PATIENTS
Author(s): Rupali S Pawar1*, Subhodhini A Abhang1, Damgaye TM2 and Rahul Lokhande2
Chronic Obstructive Pulmonary Disease (COPD) represents a major health problem. Its prevalence is increasing in worldwide. Oxidative stress is one of the major pathphysiologic hallmarks in the development of COPD. The aim of our study was to assess the relationship between the markers of oxidative / nitrosative stress (malondialdehyde and NO.) and the non-enzymatic antioxidants (vitamin E, vitamin C and GSH) with the marker of airflow obstruction (FEV1% predicted) in COPD patients. Study comprised of 185 stable COPD patients were divided into four stages according to GOLD guideline and 60 healthy controls were selected for the comparison. Pulmonary function test was done by using spirometer. Serum levels of MDA, NO., vitamin E, vitamin C and erythrocyte GSH were estimated by spectrophotometric method. Lung function tests namely FEV1/FVC% ratio and FEV1 % predicted showed significant reduction in COPD patients as compared to healthy controls. Serum level of MDA and NO. shows increasing trend while serum levels of vitamin E, vitamin C and GSH shows decreasing trend across the stages of COPD. We found a significant negative correlation between NO. and MDA with the FEV1% predicted and positive correlation between vitamin C, vitamin E and GSH with FEV1% predicted in different stages of COPD patients. From this study we conclude that as the severity of disease increases FEV1 % predicted decreases. These changes are associated with an increase in oxidative/nitrosative stress and a concomitant decrease in non-enzymatic antioxidants in different stages of COPD patients studied.
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