title: Hemodynamic effects of parathyroid hormone-related peptide-(1-34) in humans.
abstract: It has been suggested that PTH-related peptide-(1-34) (PTHrP) is a regulator or modulator of regional or systemic cardiovascular function with varying vasodilating actions in different species. We have studied the cardiovascular pharmacodynamic profile of PTHrP in healthy humans. In a double blind, placebo-controlled, cross-over study design, eight healthy subjects were assigned to stepwise increased i.v. doses of PTHrP. In addition, a dose-response curve to PTHrP was constructed in a dorsal hand vein in eight subjects. PTHrP dose-dependently increased pulse rate and renal plasma flow by more than 50% (P < 0.0001 for both parameters, by ANOVA), but only a small venodilating response was seen in hand vein experiments, and no effect was noted on mean arterial blood pressure or cardiac inotropic performance. Although it is unlikely that PTHrP regulates systemic hemodynamics, its chronotropic effect and its potent action on renal plasma flow may represent the primary cardiovascular physiological targets of action.
authors.affiliation: Department of Clinical Pharmacology, Vienna University, Austria.
authors.forename: M
authors.initials: M
authors.lastname: Wolzt
authors.forename: L
authors.initials: L
authors.lastname: Schmetterer
authors.forename: G
authors.initials: G
authors.lastname: Dorner
authors.forename: G
authors.initials: G
authors.lastname: Zelger
authors.forename: J
authors.initials: J
authors.lastname: Entlicher
authors.forename: S
authors.initials: S
authors.lastname: Kapiotis
authors.forename: H G
authors.initials: HG
authors.lastname: Eichler
mesh_terms: D000328:Adult; D000959:Antihypertensive Agents / Q000494:pharmacology; D001794:Blood Pressure / Q000187:drug effects; D018592:Cross-Over Studies; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D006439:Hemodynamics / Q000187:drug effects*; D006801:Humans; D007668:Kidney / Q000098:blood supply; D008297:Male; D044162:Parathyroid Hormone-Related Protein; D010446:Peptide Fragments / Q000008:administration & dosage / Q000494:pharmacology*; D010656:Phenylephrine / Q000494:pharmacology; D010919:Placebos; D011506:Proteins / Q000008:administration & dosage / Q000494:pharmacology*; D011674:Pulse; D012079:Renal Circulation / Q000187:drug effects; D014664:Vasodilation / Q000187:drug effects
chemical_list: D000959:Antihypertensive Agents; D044162:Parathyroid Hormone-Related Protein; D010446:Peptide Fragments; D010919:Placebos; D011506:Proteins; C054296:parathyroid hormone-related protein (1-34); D010656:Phenylephrine