title: Potent agonist activity of DOB at 5-HT2 receptors in guinea pig trachea.
abstract: DOB, 4-bromo-2,5-dimethyloxyamphetamine, a potent hallucinogen, displays high affinity for the 5-HT2 receptor in binding assays. Since 5-HT contractile responses in guinea pig trachea are mediated by 5-HT2 receptors, we assessed the activity of DOB and related analogs in this preparation. DOB acts as a partial 5-HT agonist with an EC50 = 25 nM and is blocked by the potent selective 5-HT2 receptor antagonists ketanserin, pirenperone and LY 53857, as is 5-HT. These findings indicate that DOB may be a useful agent in characterizing 5-HT2 receptor responses.
mesh_terms: D004290:DOM 2,5-Dimethoxy-4-Methylamphetamine / Q000031:analogs & derivatives / Q000494:pharmacology*; D000662:Amphetamines / Q000494:pharmacology*; D000818:Animals; D001241:Aspirin / Q000494:pharmacology; D006168:Guinea Pigs; D006213:Hallucinogens / Q000494:pharmacology*; D066298:In Vitro Techniques; D007211:Indoles / Q000494:pharmacology; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects*; D010627:Phenethylamines / Q000494:pharmacology; D011985:Receptors, Serotonin / Q000187:drug effects*; D012702:Serotonin Antagonists; D014132:Trachea / Q000187:drug effects
chemical_list: D000662:Amphetamines; D006213:Hallucinogens; D007211:Indoles; D010627:Phenethylamines; D011985:Receptors, Serotonin; D012702:Serotonin Antagonists; D004290:DOM 2,5-Dimethoxy-4-Methylamphetamine; C003943:2,5-dimethoxy-4-bromoamphetamine; D001241:Aspirin