Ethanol- and isoprenaline-induced responses in pig parenchymal lung tissue.
Ethanol (8.7-34.8 mM; 0.5-0.20% v/v) had no significant effect on spontaneously developed tension in pig lung parenchyma strips, although higher cumulative concentrations caused relaxation (at 34.8-174 mM) and contraction (at 348-1392 mM). Ethanol-induced effects were not caused by activation of adrenoceptors or of cholinoceptors, since blockade of these receptors did not alter those effects. Single low concentrations of ethanol (8.7-34.8 mM) which can occur in-vivo in man, caused increases in the relaxant potency of isoprenaline in pig lung strips, although the sizes of these increases varied widely. In addition, ethanol-induced potentiation of isoprenaline was not concentration-related. This effect was not caused by inhibition of isoprenaline uptake since [3H]isoprenaline transport was found not to be significantly altered in the presence of ethanol (8.7-34.8 mM).
D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D000431:Ethanol / Q000494:pharmacology*; D066298:In Vitro Techniques; D007545:Isoproterenol / Q000378:metabolism / Q000494:pharmacology*; D008168:Lung / Q000187:drug effects*; D013552:Swine
D000431:Ethanol; D007545:Isoproterenol; D000109:Acetylcholine