The participation of the subepithelial airway receptor in the bronchoconstriction of monkeys.
In order to elucidate the mechanism of the bronchial response of monkeys to constrictive stimuli, the effects of pretreatment with aerosolized lidocaine, atropine, and isoproterenol were studied. Treatment with aerosolized lidocaine and atropine not only extinguished the cough reflex, but also decreased bronchial susceptibility to aerosolized methacholine. Moreover, the pretreatment with lidocaine blocked the histamine challenge, but atropine did not. The aerosolized lidocaine decreased the bronchoconstriction induced with methacholine, but not with histamine. Pretreatment with over 1% of isoproterenol did not extinguish the cough reflex. However, this dose of isoproterenol did suppress an increase in Rrs due to the challenge of both methacholine and histamine. Isoproterenol also decreased the bronchoconstriction due to the previous challenge by both methacholine and histamine. The antagonistic effects of lidocaine, atropine, and isoproterenol on the broncho-constriction of monkeys are discussed in relation to the subepithelial receptor.
D000336:Aerosols; D000403:Airway Resistance / Q000187:drug effects; D000818:Animals; D001285:Atropine / Q000494:pharmacology*; D001980:Bronchi / Q000187:drug effects / Q000502:physiology*; D003251:Constriction, Pathologic; D005260:Female; D006632:Histamine / Q000494:pharmacology; D007545:Isoproterenol / Q000494:pharmacology*; D008012:Lidocaine / Q000494:pharmacology*; D008251:Macaca; D008297:Male; D016210:Methacholine Chloride; D008688:Methacholine Compounds / Q000494:pharmacology; D014630:Vagus Nerve / Q000502:physiology
D000336:Aerosols; D008688:Methacholine Compounds; D016210:Methacholine Chloride; D001285:Atropine; D006632:Histamine; D008012:Lidocaine; D007545:Isoproterenol