Cardiovascular effects of neuropeptide FF antagonists.
The neuropeptide FF (NPFF) antagonist desaminotyrosyl-Phe-Leu-Phe-Gln-Pro-Gln-Arg-NH2 dose-dependently reversed NPFF-induced elevation of blood pressure in anesthetized rats after intravenous injection without causing a significant change of blood pressure and heart rate by itself. However, another antagonist dansyl-Pro-Gln-Arg-NH2 produced a significant drop of the mean arterial pressure only at a large dose (10 micromol/kg body weight), but reversal of the NPFF-induced hypertension was modest. Consequently and contrary to the conclusions of a previous study, NPFF antagonists cannot be identified simply by measuring the changes in the hemodynamic parameters upon the injection of the compounds alone and without a subsequent NPFF challenge.
Prokai
Laszlo
L
Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610-0485, USA. lprokai@hsc.unt.edu
Zharikova
Alevtina D
AD
Juhasz
Attila
A
Prokai-Tatrai
Katalin
K
D000818:Animals; D001794:Blood Pressure / Q000187:drug effects*; D006339:Heart Rate / Q000187:drug effects*; D008297:Male; D009479:Neuropeptides / Q000494:pharmacology*; D009842:Oligopeptides / Q000037:antagonists & inhibitors* / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley
D009479:Neuropeptides; D009842:Oligopeptides; C402061:dansyl-prolyl-glutaminyl-argininamide; C073647:desamino-tyrosyl-phenylalanyl-leucyl-phenylalanyl-glutaminyl-prolyl-glutaminyl-argininamide; C053651:phenylalanyl-leucyl-phenylalanyl-glutaminyl-prolyl-glutaminyl-arginyl-phenylalaninamide