We have located links that may give you full text access.
Journal Article
Research Support, U.S. Gov't, P.H.S.
Relative involvement of mu, kappa and delta receptor mechanisms in opiate-mediated antinociception in mice.
The antinociceptive properties of morphine (mu), ethylketazocine (kappa), nalorphine (kappa), [D-Ala2, D-Leu5]enkephalin (delta) and [D-Ala2, Met5]enkephalinamide (mu, delta) were assessed using the radiant heat tail-flick and acetic acid-induced writhing assays in mice. The apparent pA2 values for the interaction of naloxone with morphine were the same regardless of the nociceptive stimulus employed or the route of administration of morphine. The apparent pA2 values for the interactions of naloxone with ethylketazocine and nalorphine in the writhing test differed significantly from that for the interaction of morphine and naloxone. Nalorphine did not produce a consistent antinociceptive effect on the tail-flick test. The apparent pA2 values for the interaction of ethylketazocine (s.c. or i.c.v.) with naloxone were similar to those for morphine-naloxone interactions on the tail-flick assay. The apparent pA2 values for the interactions of naloxone with [D-Ala2, D-Leu5] enkephalin differed from those for morphine-naloxone interactions on the writhing test. The highly selective mu antagonist beta-funaltrexamine antagonized the agonist actions of morphine and [D-Ala2, D-Leu5]enkephalin, and, in a previous study, beta-funaltrexamine antagonized the antinociceptive actions of [D-Ala2, Met5]enkephalinamide, but not those of nalorphine. It was concluded that agonist interaction with mu or kappa receptors can result in antinociceptive effects in the acetic acid-induced writhing test, and that an agonist interaction with mu, but not kappa, receptors results in antinociceptive action on the radiant heat tail-flick test, and furthermore, that a possible combination of mu and delta receptor interaction can result in antinociceptive activity in both tests.
Full text links
Related Resources
Trending Papers
Challenges in Septic Shock: From New Hemodynamics to Blood Purification Therapies.Journal of Personalized Medicine 2024 Februrary 4
Molecular Targets of Novel Therapeutics for Diabetic Kidney Disease: A New Era of Nephroprotection.International Journal of Molecular Sciences 2024 April 4
The 'Ten Commandments' for the 2023 European Society of Cardiology guidelines for the management of endocarditis.European Heart Journal 2024 April 18
A Guide to the Use of Vasopressors and Inotropes for Patients in Shock.Journal of Intensive Care Medicine 2024 April 14
Diagnosis and Management of Cardiac Sarcoidosis: A Scientific Statement From the American Heart Association.Circulation 2024 April 19
Essential thrombocythaemia: A contemporary approach with new drugs on the horizon.British Journal of Haematology 2024 April 9
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app