Hypotensive effect of intracerebroventricular injection of norepinephrine and its modulation by alpha and beta adrenergic blockers in conscious rabbits.

Journal Article (Journal Article)

The present study was designed to investigate the role of central adrenoceptors in the hypotensive effect of intracerebroventricular (ICV) injection of norepinephrine (NE) in conscious rabbits. Experiments were carried out on 19 adult rabbits (oryctolagus cuniculus) of either sex. A dose-dependent hypotensive response to ICV injection of NE was observed with no significant change in heart rate. The hypotensive response of NE was blocked 74.2 +/- 0.7% by yohimbine (alpha-2 adrenergic blocker), and 25.0 +/- 0.5% by metoprolol (beta-1 adrenergic blocker). NE response was not affected either by prazosin or butoxamine (alpha-1 and beta-2 adrenergic blockers respectively). The results suggest that the dose-dependent hypotensive response of ICV administered NE is mediated through alpha-2 and beta-1 central adrenoceptors.

Duke Authors

Cited Authors

  • Krishna, B; Hussain, ME; Chakrabarty, AS; Jain, AK; Chakrabarty, K; Fahim, M

Published Date

  • October 1995

Published In

Volume / Issue

  • 39 / 4

Start / End Page

  • 361 - 368

PubMed ID

  • 8582748

International Standard Serial Number (ISSN)

  • 0019-5499


  • eng