Abstract
Intracerebroventricular (i.c.v.) injections of a novel tachykinin peptide, gamma-preprotachykinin-(72-92)-peptide amide (neuropeptide gamma, NP gamma), caused dose-dependent increases in blood pressure. The NP gamma-induced pressor responses (1 microgram i.c.v.) were blocked by peripheral administration of pentolinium (10 mg/kg i.v.) and phentolamine (10 mg/kg i.v.), but were not inhibited by a vasopressin antagonist. These results suggest that central NP gamma increases the blood pressure via sympathetic nerve activity.
Publication types
-
Research Support, Non-U.S. Gov't
MeSH terms
-
Animals
-
Blood Pressure / drug effects*
-
Central Nervous System / drug effects*
-
Dose-Response Relationship, Drug
-
Heart Rate / drug effects
-
Hemodynamics / drug effects*
-
Injections, Intraventricular
-
Male
-
Neurokinin A / pharmacology
-
Peptide Fragments / administration & dosage
-
Peptide Fragments / pharmacology*
-
Rats
-
Rats, Inbred Strains
-
Substance P / pharmacology
-
Tachykinins / administration & dosage
-
Tachykinins / pharmacology*
Substances
-
Peptide Fragments
-
Tachykinins
-
tachykinin neuropeptide gamma
-
Substance P
-
Neurokinin A