Rolipram inhibits PAF‐induced airway microvascular leakage in guinea‐pig: a comparison with milrinone and theophylline

Abstract
Summary—The effects of 3 phosphodiesterase (PDE) inhibitors, rolipram (PDE IV), milrinone (PDE III) and theophylline (nonselective) on PAF (50 ng kg−1; iv)‐induced airway vascular leakage have been evaluated in guinea‐pigs. Rolipram (3–300 μg kg−1; iv) reduced the increase in permeability induced by PAF at all airway levels whereas milrinone (10–1000 μg kg−1; iv) and theophylline (30 mg kg−1; iv) were without effects. The anti‐leakage activity of rolipram may be of therapeutic value in asthma.