Faculty Collaboration Database

Effect of AVP on pressor responses to peripheral sympathetic stimulation in the rat. Am J Physiol 1987 Apr;252(4 Pt 2):H675-80

Date

04/11/1987

Pubmed ID

3565586

DOI

10.1152/ajpheart.1987.252.4.H675

Scopus ID

2-s2.0-0023243565 (requires institutional sign-in at Scopus site)   8 Citations

Abstract

Studies were carried out to determine whether arginine vasopressin (AVP) could modulate pressor responses to peripheral sympathetic stimulation or potentiate systemic norepinephrine (NE) vasoconstrictor effects. The effects of graded 30-min infusions of AVP (0.02, 0.2, and 2.0 ng X kg-1 X min-1) on the pressor responses to either electrical stimulation of spinal sympathetic outflow or NE injection (0.1, 0.5, and 1.0 micrograms/kg) were determined in central nervous system-ablated rats. Spinal stimulation with increasing frequency (0.25, 0.5, and 1.0 Hz, n = 8) at a constant voltage (20 V) or increasing voltage (8, 10, 15, and 20 V, n = 6) at a constant frequency (1 Hz) elicited significant stimulus-response relationships in mean arterial pressure (MAP). Similarly, NE increased MAP in a dose-related manner. AVP had no significant effect (P less than 0.05) on pressor responses to increasing frequency or voltage stimulation or to NE injection. We conclude that pressor responses to sympathetic stimulation in the rat are not modulated by actions of AVP to inhibit peripheral sympathetic ganglionic transmission or potentiate NE vasoconstrictor effects.

Author List

Osborn JW Jr, Liard JF, Cowley AW Jr

Author

Allen W. Cowley Jr PhD Professor in the Physiology department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Animals
Arginine Vasopressin
Blood Pressure
Electric Stimulation
Heart Rate
Male
Norepinephrine
Rats
Spinal Cord
Sympathetic Nervous System
Vasomotor System