title: High-affinity neuropeptide Y receptor antagonists.
abstract: Neuropeptide Y (NPY) is one of the most abundant peptide transmitters in the mammalian brain. In the periphery it is costored and coreleased with norepinephrine from sympathetic nerve terminals. However, the physiological functions of this peptide remain unclear because of the absence of specific high-affinity receptor antagonists. Three potent NPY receptor antagonists were synthesized and tested for their biological activity in in vitro, ex vivo, and in vivo functional assays. We describe here the effects of these antagonists inhibiting specific radiolabeled NPY binding at Y1 and Y2 receptors and antagonizing the effects of NPY in human erythroleukemia cell intracellular calcium mobilization perfusion pressure in the isolated rat kidney, and mean arterial blood pressure in anesthetized rats.
authors.affiliation: Division of Pharmacology, Burroughs Wellcome Co., Research Triangle Park, NC 27709, USA.
authors.forename: A J
authors.initials: AJ
authors.lastname: Daniels
authors.forename: J E
authors.initials: JE
authors.lastname: Matthews
authors.forename: R J
authors.initials: RJ
authors.lastname: Slepetis
authors.forename: M
authors.initials: M
authors.lastname: Jansen
authors.forename: O H
authors.initials: OH
authors.lastname: Viveros
authors.forename: A
authors.initials: A
authors.lastname: Tadepalli
authors.forename: W
authors.initials: W
authors.lastname: Harrington
authors.forename: D
authors.initials: D
authors.lastname: Heyer
authors.forename: A
authors.initials: A
authors.lastname: Landavazo
authors.forename: J J
authors.initials: JJ
authors.lastname: Leban
authors.forename: A
authors.initials: A
authors.lastname: Spaltenstein
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001921:Brain / Q000378:metabolism*; D002118:Calcium / Q000378:metabolism; D002460:Cell Line; D006801:Humans; D007668:Kidney / Q000378:metabolism*; D007700:Kinetics; D004915:Leukemia, Erythroblastic, Acute; D008297:Male; D008322:Mammals; D008969:Molecular Sequence Data; D009447:Neuroblastoma; D009478:Neuropeptide Y / Q000378:metabolism* / Q000494:pharmacology; D009928:Organ Specificity; D010455:Peptides / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D011817:Rabbits; D051381:Rats; D017207:Rats, Sprague-Dawley; D017476:Receptors, Neuropeptide Y / Q000037:antagonists & inhibitors* / Q000378:metabolism*; D013329:Structure-Activity Relationship; D013552:Swine; D014407:Tumor Cells, Cultured
chemical_list: D009478:Neuropeptide Y; D010455:Peptides; D017476:Receptors, Neuropeptide Y; D002118:Calcium