Participation of beta 2-receptors in the control of rabbit ciliary epithelial permeability.
The interaction between several adrenergic agonists (epinephrine, norepinephrine and isoproterenol) and relatively specific beta 1- and beta 2-antagonists has been examined on fluid permeability of the isolated rabbit ciliary epithelium. A specific beta 1-antagonist (metoprolol) had little effect on the permeability increase induced by the agonists, whereas butoxamine (a specific beta 2-antagonist) caused an inhibition of the normal agonist-induced permeability increase. The data suggest that these three adrenergic agonists primarily affect the beta 2-receptor in the ciliary epithelium in order to induce their effects on fluid permeability.
D000318:Adrenergic beta-Agonists / Q000494:pharmacology*; D000319:Adrenergic beta-Antagonists / Q000494:pharmacology*; D000818:Animals; D002078:Butoxamine / Q000494:pharmacology; D002924:Ciliary Body / Q000187:drug effects*; D004848:Epithelium / Q000187:drug effects; D066298:In Vitro Techniques; D008790:Metoprolol / Q000494:pharmacology; D010539:Permeability; D011817:Rabbits; D011941:Receptors, Adrenergic / Q000187:drug effects*; D011943:Receptors, Adrenergic, beta / Q000187:drug effects*
D000318:Adrenergic beta-Agonists; D000319:Adrenergic beta-Antagonists; D011941:Receptors, Adrenergic; D011943:Receptors, Adrenergic, beta; D002078:Butoxamine; D008790:Metoprolol