Abstract
Defensins are key effector molecules of innate immunity that can contribute towards the diagnosis and monitoring of chronic obstructive pulmonary disease (COPD). The present study was conducted to investigate the role of alpha-defensins in patients with COPD by quantifying serum and sputum samples. A total of 180 patients were enrolled and divided into four groups, and sputum and serum values of alpha-defensins were assessed. The sensitivity, specificity, and accuracy of sputum alpha-defensin as a diagnostic biomarker were evaluated to assess its utility in diagnosing COPD. The mean value of sputum alpha-defensins was found to be statistically significant amongst the four groups (P < 0.001). The highest levels were found in subjects with AECOPD (385.76 ± 116.62 ng/mL). Sputum alpha-defensins were found to be negatively correlated with FEV 1 values (rho = -0.31, P < 0.001). Sputum alpha-defensins can be used as a potential marker for predicting acute exacerbation of COPD. In addition, they could serve as an indicator of disease severity in COPD patients.
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