title: Effect of derivatives of 3-(beta-aminoethyl)-1,2,4-triazole on the histamine H1- and H2-receptors.
abstract: Derivatives of 3-(beta-aminoethyl)-1,2,4-triazole similar to histamine have been resynthesized and studied. Four well-known effects of histamine have been considered (the contractions of an isolated guinea pig terminal ileum, dog gastric acid secretion, contractile frequency of an isolated guinea pig right atrium, blood pressure lowering effect in cats). Newly synthesized compounds IEM-813 and IEM-759 exerted some selective effects of H1 and H2-receptors: IEM-813 showed greater affinity for gut-isolated H1-receptors than for stomach and atrium H2-receptors, while IEM-759 mainly influenced H2-receptors. Accordingly, the influence of 1,2,4-triazole analogues on H1- and H2-receptors is subject to structural demands.
mesh_terms: D000818:Animals; D001794:Blood Pressure / Q000187:drug effects; D002415:Cats; D004285:Dogs; D005750:Gastric Juice / Q000378:metabolism; D006168:Guinea Pigs; D006325:Heart Atria / Q000187:drug effects; D007082:Ileum / Q000187:drug effects; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects; D011968:Receptors, Histamine / Q000187:drug effects*; D011969:Receptors, Histamine H1 / Q000187:drug effects*; D011970:Receptors, Histamine H2 / Q000187:drug effects*; D012636:Secretory Rate / Q000187:drug effects; D014230:Triazoles / Q000494:pharmacology*
chemical_list: D011968:Receptors, Histamine; D011969:Receptors, Histamine H1; D011970:Receptors, Histamine H2; D014230:Triazoles