Stepronin (Prostenoglycine) is an orally active expectorant (inhalation administration is preferable to oral administration). Stepronin inhibits airway secretion in vitro by reducing Cl- secretion from epithelial cells and mucus glycoprotein secretion from submucosal glands.In Vitro:Stepronin (0.1-100 μM; 20 min) induces significant reductions in ISOP(Isoproterenol)-evoked SCC (short circuit current) value in a dose-dependent manner in canine tracheal epithelium.
Stepronin (10-100 μM; 20 min) significantly inhibits the basal secretion and ISOP-evoked PD (potential difference) value in a dose-dependent manner in canine tracheal epithelium.
Stepronin (100 μM; 20 min) significantly inhibits ISOP-induced [3H]-glycoconjugate secretion in submucosal glands.