title: Different effects of five dopamine receptor subtypes on nuclear factor-kappaB activity in NG108-15 cells and mouse brain.
abstract: We previously showed that dopamine receptors D1R and D2R expressed in NG108-15 cells activated protein kinase A and extracellular signal-regulated kinase (ERK) respectively, resulting in differential activation of nuclear factor (NF)-kappaB activity. To investigate whether other dopamine receptor subtypes regulate NF-kappaB, we established NG108-15 cells stably expressing D3R, D4R and D5R (NGD3R, NGD4R and NGD5R). D5R stimulation with SKF 38393 decreased NF-kappaB luciferase reporter activity in NGD5R cells, similar to D1R stimulation in NGD1R cells. However, D3R or D4R stimulation with quinpirole showed no change in NF-kappaB-Luci activity, although forskolin-induced cyclic AMP responsive element-Luci activation was attenuated by quinpirole treatment in NGD2LR, NGD3R and NGD4R cells. As expected, activation of ERK or serum responsive element-luciferase reporter not observed following stimulation with quinpirole in D3R- or D4R-expressing cells. We further examined the effects of haloperidol and risperidone, which are typical and atypical antipsychotic drugs respectively, on NF-kappaB activity by gel shift assay in mouse frontal cortex. Haloperidol treatment slightly attenuated basal NF-kappaB activity. By contrast, risperidone treatment enhanced NF-kappaB activity. Taken together, D2R and D1R/D5R had opposite effects on NF-kappaB activity in NG108-15 cells. Risperidone up-regulated and haloperidol down-regulated NF-kappaB activity in mouse brain. This effect may be related to the atypical antipsychotic properties of risperidone.
authors.affiliation: Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan. yusuket@mail.pharm.tohoku.ac.jp
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Takeuchi
authors.forename: Kohji
authors.initials: K
authors.lastname: Fukunaga
mesh_terms: D000818:Animals; D014150:Antipsychotic Agents / Q000494:pharmacology; D001921:Brain / Q000187:drug effects / Q000378:metabolism*; D002460:Cell Line; D005576:Colforsin / Q000494:pharmacology; D004247:DNA / Q000378:metabolism; D018492:Dopamine Antagonists / Q000494:pharmacology; D024202:Electrophoretic Mobility Shift Assay; D005625:Frontal Lobe / Q000187:drug effects / Q000378:metabolism; D005786:Gene Expression Regulation / Q000187:drug effects; D006220:Haloperidol / Q000494:pharmacology; D051379:Mice; D020928:Mitogen-Activated Protein Kinases / Q000187:drug effects / Q000378:metabolism; D016328:NF-kappa B / Q000378:metabolism*; D011485:Protein Binding / Q000187:drug effects; D051381:Rats; D011954:Receptors, Dopamine / Q000187:drug effects / Q000235:genetics / Q000378:metabolism*; D018967:Risperidone / Q000494:pharmacology
chemical_list: D014150:Antipsychotic Agents; D018492:Dopamine Antagonists; D016328:NF-kappa B; D011954:Receptors, Dopamine; D005576:Colforsin; D004247:DNA; D020928:Mitogen-Activated Protein Kinases; D006220:Haloperidol; D018967:Risperidone