title: Possible role of leukotrienes in propranolol-induced airway hyperreactivity in sensitized guinea-pigs.
abstract: In anesthetized guinea-pigs previously sensitized to ovalbumin by intratracheal immunization, the intravenous administration of propranolol (3.1 mg/kg) produced an increase in the respiratory insufflation pressure induced by ovalbumin. Atropine (2 mg/kg), zolertine (1 mg/kg) and indomethacin (3.1 mg/kg) did not antagonize the propranolol-induced airway hyperreactivity. Indomethacin at higher dose (10 mg/kg) and BW755c (10 mg/kg) decreased the potentiation of the respiratory insufflation pressure to ovalbumin. Our results suggest that besides the beta-blockade, propranolol-induced bronchial hyperreactivity to ovalbumin in sensitized guinea-pigs could be mediated by leukotrienes.
mesh_terms: D015772:4,5-Dihydro-1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-amine; D000403:Airway Resistance / Q000187:drug effects; D000818:Animals; D001285:Atropine / Q000494:pharmacology; D006168:Guinea Pigs; D007213:Indomethacin / Q000494:pharmacology; D010047:Ovalbumin / Q000276:immunology; D010879:Piperazines / Q000494:pharmacology; D011433:Propranolol / Q000494:pharmacology*; D011720:Pyrazoles / Q000494:pharmacology; D012130:Respiratory Hypersensitivity / Q000139:chemically induced* / Q000276:immunology / Q000503:physiopathology; D013189:SRS-A / Q000502:physiology*
chemical_list: D010879:Piperazines; D011720:Pyrazoles; D013189:SRS-A; D015772:4,5-Dihydro-1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-amine; D001285:Atropine; D010047:Ovalbumin; D011433:Propranolol; C005897:zolertine; D007213:Indomethacin