Skip to main content
Advertisement

Main menu

  • Home
  • Articles
    • Current Issue
    • Fast Forward
    • Latest Articles
    • Special Sections
    • Archive
  • Information
    • Instructions to Authors
    • Submit a Manuscript
    • FAQs
    • For Subscribers
    • Terms & Conditions of Use
    • Permissions
  • Editorial Board
  • Alerts
    • Alerts
    • RSS Feeds
  • Virtual Issues
  • Feedback
  • Submit
  • Other Publications
    • Drug Metabolism and Disposition
    • Journal of Pharmacology and Experimental Therapeutics
    • Molecular Pharmacology
    • Pharmacological Reviews
    • Pharmacology Research & Perspectives
    • ASPET

User menu

  • My alerts
  • Log in
  • My Cart

Search

  • Advanced search
Journal of Pharmacology and Experimental Therapeutics
  • Other Publications
    • Drug Metabolism and Disposition
    • Journal of Pharmacology and Experimental Therapeutics
    • Molecular Pharmacology
    • Pharmacological Reviews
    • Pharmacology Research & Perspectives
    • ASPET
  • My alerts
  • Log in
  • My Cart
Journal of Pharmacology and Experimental Therapeutics

Advanced Search

  • Home
  • Articles
    • Current Issue
    • Fast Forward
    • Latest Articles
    • Special Sections
    • Archive
  • Information
    • Instructions to Authors
    • Submit a Manuscript
    • FAQs
    • For Subscribers
    • Terms & Conditions of Use
    • Permissions
  • Editorial Board
  • Alerts
    • Alerts
    • RSS Feeds
  • Virtual Issues
  • Feedback
  • Submit
  • Visit jpet on Facebook
  • Follow jpet on Twitter
  • Follow jpet on LinkedIn
Abstract

Alpha-1 adrenoceptors and calcium in isolated canine coronary arteries.

T J Rimele, T W Rooke, L L Aarhus and P M Vanhoutte
Journal of Pharmacology and Experimental Therapeutics September 1983, 226 (3) 668-672;
T J Rimele
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
T W Rooke
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
L L Aarhus
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
P M Vanhoutte
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • Article
  • Info & Metrics
  • eLetters
  • PDF
Loading

Abstract

Experiments were designed to define the postjunctional alpha adrenoceptor subtype(s) in large canine coronary arteries and to determine the dependency of contractions due to their activation upon the entry of extracellular calcium. Rings of left circumflex coronary artery were mounted at their optimal length for isometric tension recording in organ chambers filled with physiological salt solution. Phenylephrine and cirazoline were full agonists relative to norepinephrine. Methoxamine was a partial agonist relative to norepinephrine whereas clonidine, xylazine, B-HT 920 and B-HT 933 produced minimal contractions. Prazosin competitively inhibited the contractile response to phenylephrine (pA2 = 8.6), whereas rauwolscine caused a noncompetitive inhibition and was more than 100 times less potent than prazosin at inhibiting the response to phenylephrine. Similar results were obtained using norepinephrine (in the presence of propranolol) as the agonist. The calcium-entry blockers nimodipine, verapamil and diltiazem inhibited contractions caused by norepinephrine, phenylephrine and cirazoline. Removal of extracellular calcium abolished the response to cirazoline. These results suggest that in large canine coronary arteries: 1) only alpha-1 adrenoceptors are present postjunctionally and 2) responses due to alpha-1 adrenoceptor activation are dependent upon extracellular calcium.

JPET articles become freely available 12 months after publication, and remain freely available for 5 years. 

Non-open access articles that fall outside this five year window are available only to institutional subscribers and current ASPET members, or through the article purchase feature at the bottom of the page. 

 

  • Click here for information on institutional subscriptions.
  • Click here for information on individual ASPET membership.

 

Log in using your username and password

Forgot your user name or password?

Purchase access

You may purchase access to this article. This will require you to create an account if you don't already have one.
PreviousNext
Back to top

In this issue

Journal of Pharmacology and Experimental Therapeutics
Vol. 226, Issue 3
1 Sep 1983
  • Table of Contents
  • Table of Contents (PDF)
  • Index by author
  • Back Matter (PDF)
  • Editorial Board (PDF)
  • Front Matter (PDF)
Download PDF
Article Alerts
Sign In to Email Alerts with your Email Address
Email Article

Thank you for sharing this Journal of Pharmacology and Experimental Therapeutics article.

NOTE: We request your email address only to inform the recipient that it was you who recommended this article, and that it is not junk mail. We do not retain these email addresses.

Enter multiple addresses on separate lines or separate them with commas.
Alpha-1 adrenoceptors and calcium in isolated canine coronary arteries.
(Your Name) has forwarded a page to you from Journal of Pharmacology and Experimental Therapeutics
(Your Name) thought you would be interested in this article in Journal of Pharmacology and Experimental Therapeutics.
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
Citation Tools
Abstract

Alpha-1 adrenoceptors and calcium in isolated canine coronary arteries.

T J Rimele, T W Rooke, L L Aarhus and P M Vanhoutte
Journal of Pharmacology and Experimental Therapeutics September 1, 1983, 226 (3) 668-672;

Citation Manager Formats

  • BibTeX
  • Bookends
  • EasyBib
  • EndNote (tagged)
  • EndNote 8 (xml)
  • Medlars
  • Mendeley
  • Papers
  • RefWorks Tagged
  • Ref Manager
  • RIS
  • Zotero

Share
Abstract

Alpha-1 adrenoceptors and calcium in isolated canine coronary arteries.

T J Rimele, T W Rooke, L L Aarhus and P M Vanhoutte
Journal of Pharmacology and Experimental Therapeutics September 1, 1983, 226 (3) 668-672;
del.icio.us logo Digg logo Reddit logo Twitter logo Facebook logo Google logo Mendeley logo
  • Tweet Widget
  • Facebook Like
  • Google Plus One

Jump to section

  • Article
  • Info & Metrics
  • eLetters
  • PDF

Related Articles

Cited By...

Similar Articles

Advertisement
  • Home
  • Alerts
Facebook   Twitter   LinkedIn   RSS

Navigate

  • Current Issue
  • Fast Forward by date
  • Fast Forward by section
  • Latest Articles
  • Archive
  • Search for Articles
  • Feedback
  • ASPET

More Information

  • About JPET
  • Editorial Board
  • Instructions to Authors
  • Submit a Manuscript
  • Customized Alerts
  • RSS Feeds
  • Subscriptions
  • Permissions
  • Terms & Conditions of Use

ASPET's Other Journals

  • Drug Metabolism and Disposition
  • Molecular Pharmacology
  • Pharmacological Reviews
  • Pharmacology Research & Perspectives
ISSN 1521-0103 (Online)

Copyright © 2023 by the American Society for Pharmacology and Experimental Therapeutics