Figure 7.

Antioxidant enzyme expression in nasopharyngeal secretions (NPS) of infants with naturally acquired respiratory syncytial virus (RSV) infections. (A) Western blot analysis of superoxide dismutase (SOD) 1, SOD 2, and SOD 3, catalase, and glutathione S-transferase (GST)-mu in NPS of children with upper respiratory tract infections (URTI), bronchiolitis (BR), bronchiolitis with hypoxia (BR + H), and patients on ventilatory support (VS). β-actin was used as a control for protein integrity and equal loading of the samples. Densitometric analysis of Western blot band intensities was performed using Alpha Ease software. *P < 0.05; **P < 0.01, compared with URTI.