Effects of corticosteroid, montelukast and iNOS inhibition on distal lung with chronic inflammation.

Unlabelled: We evaluated the effects of anti-iNOS (1400W - W) associated with leukotriene antagonist (montelukast - M) or corticosteroid (dexamethasone - D) on distal lung of guinea pigs (GP) with chronic pulmonary inflammation.

Methods: GP were inhaled with ovalbumin (OVA-2×/week/4 weeks), treated with M (OVAM), D (OVAD) and/or W (OVAW, OVADW, OVAMW) and distal lungs were evaluated by morphometry.

Results: Isolated treatments were not sufficient to reduce all parameters.

Effects of stress and neuropeptides on airway responses in ovalbumin-sensitized rats.

Objective: The aim of this study was to investigate the influence of stress and neuropeptides on airway responses in ovalbumin (OVA)-sensitized rats.

Methods: Three experimental conditions were employed: neonatal capsaicin treatment, foot shock stress and OVA sensitization. For neuropeptide depletion, male Wistar rats were neonatally treated with capsaicin (50 mg/kg) or with control solution 2 days after birth.