title: Decreased c-fos responses to dopamine D(1) receptor agonist stimulation in mice deficient for D(3) receptors.
abstract: The acute administration of dopamine D(1) receptor agonists induces the expression of the immediate early gene c-fos. In wild type mice, this induction is completely abolished by pretreatment with the D(1)-selective antagonist SCH23390, and pretreatment with the D(2)-like receptor antagonist eticlopride reduces the levels of c-fos expressed in response to D(1) receptor stimulation. Mice deficient for the dopamine D(3) receptor express levels of D(1) agonist-stimulated c-fos immunoreactivity that are lower than c-fos levels of their wild type littermates. Moreover, the acute blockade of D(2) receptors in D(3) mutant mice further reduces c-fos expression levels. These data indicate that the basal activity of both D(2) and D(3) receptors contributes to D(1) agonist-stimulated c-fos responses. The findings therefore indicate that not only D(2) but also D(3) receptors play a role in dopamine-regulated gene expression.
authors.affiliation: Department of Psychiatry, Columbia University, New York, New York 10032, USA.
authors.forename: M Y
authors.initials: MY
authors.lastname: Jung
authors.forename: C
authors.initials: C
authors.lastname: Schmauss
mesh_terms: D000818:Animals; D001552:Benzazepines / Q000494:pharmacology; D001921:Brain / Q000378:metabolism; D017362:Cyclic AMP Response Element-Binding Protein / Q000378:metabolism; D018491:Dopamine Agonists / Q000494:pharmacology; D018492:Dopamine Antagonists / Q000494:pharmacology; D065127:Dopamine D2 Receptor Antagonists; D005786:Gene Expression Regulation / Q000187:drug effects; D008297:Male; D051379:Mice; D018345:Mice, Knockout; D017346:Protein Serine-Threonine Kinases / Q000378:metabolism; D016760:Proto-Oncogene Proteins c-fos / Q000378:metabolism*; D017447:Receptors, Dopamine D1 / Q000819:agonists* / Q000037:antagonists & inhibitors; D017448:Receptors, Dopamine D2 / Q000235:genetics* / Q000378:metabolism; D050637:Receptors, Dopamine D3; D012457:Salicylamides / Q000494:pharmacology
chemical_list: D001552:Benzazepines; D017362:Cyclic AMP Response Element-Binding Protein; D018491:Dopamine Agonists; D018492:Dopamine Antagonists; D065127:Dopamine D2 Receptor Antagonists; C493594:Drd3 protein, mouse; D016760:Proto-Oncogene Proteins c-fos; D017447:Receptors, Dopamine D1; D017448:Receptors, Dopamine D2; D050637:Receptors, Dopamine D3; D012457:Salicylamides; C071262:SK&F 82958; D017346:Protein Serine-Threonine Kinases; C045989:eticlopride