SAGE Journals Online
Advertisement
Sign In to gain access to subscriptions and/or personal tools.

 

Advanced Search

Journal Navigation

Journal Home

Subscriptions

Archive

Contact Us

Table of Contents

Advertisement

Sign In to gain access to subscriptions and/or personal tools.
Journal of Psychopharmacology
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to Saved Citations
Right arrow Download to citation manager
Right arrowRequest Permissions
Right arrow Request Reprints
Right arrow Add to My Marked Citations
Citing Articles
Right arrow Citing Articles via Google Scholar
Right arrow Citing Articles via Scopus
Google Scholar
Right arrow Articles by Zarrindast, M.-R.
Right arrow Articles by Moslehi, M.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Zarrindast, M.-R.
Right arrow Articles by Moslehi, M.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

Potentiation of licking in rats by stimulation of both D-1 and D-2 dopamine receptors

Mohammad-Reza Zarrindast

Department of Pharmacology, Medical Faculty, University of Tehran, Tehran, Iran

Farshad Roushan-Zamir

Department of Pharmacology, Medical Faculty, University of Tehran, Tehran, Iran

Forough Amir-Rahmat

Department of Pharmacology, Medical Faculty, University of Tehran, Tehran, Iran

Mojtaba Moslehi

Department of Pharmacology, Medical Faculty, University of Tehran, Tehran, Iran

Apomorphine-induced licking in rats was assessed by recording the total number of licks by direct observation. Apomorphine induced licking dose dependently. The maximum response was obtained by 0.5 mg/kg of the drug and 30 min after drug administration. Pre-treatment with dopamine antagonists, sulpiride and SCH 23390 decreased the apomorphine effect. Pre-treatment of animals with reserpine+{alpha}-methyl-p-tyrosine (AMPT) increased apomorphine-induced licking. In normal rats the D-2 agonist quinpirole and the D-1 agonist SKF 38393 also induced significant licking. The effect of quinpirole or SKF 38393 was decreased by reserpine+AMPT pre-treatment. Combined treatment with SKF 38393 and quinpirole induced more intense licking in both reserpinized and non-reserpinized animals. It is therefore concluded that the apomorphine-induced licking is mediated through both D-1 and D-2 receptors, and that pre-treatment with reserpine hypersensitizes these receptors to the drug effect. However, for either SKF 38393- or quinpirole-induced licking, the presence of endogenous dopamine seems essential.

Key Words: D-1 and D-2 receptors • apomorphine • quinpirole • SKF 38393 • reserpine • licking • rats

Journal of Psychopharmacology, Vol. 6, No. 3, 395-398 (1992)
DOI: 10.1177/026988119200600309
Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?




Advertisement