title: Increased D1 dopamine receptor signaling in levodopa-induced dyskinesia.
abstract: Involuntary movements, or dyskinesia, represent a debilitating complication of levodopa therapy for Parkinson's disease. Although changes affecting D(1) and D(2) dopamine receptors have been studied in association with this condition, no causal relationship has yet been established. Taking advantage of a monkey brain bank constituted to study levodopa-induced dyskinesia, we report changes affecting D(1) and D(2) dopamine receptors within the striatum of normal, parkinsonian, nondyskinetic levodopa-treated parkinsonian, and dyskinetic levodopa-treated parkinsonian animals. Whereas D(1) receptor expression itself is not related to dyskinesia, D(1) sensitivity per D(1) receptor measured by D(1) agonist-induced [(35)S]GTPgammaS binding is linearly related to dyskinesia. Moreover, the striata of dyskinetic animals show higher levels of cyclin-dependent kinase 5 (Cdk5) and of the dopamine- and cAMP-regulated phosphoprotein of 32kDa (DARPP-32). Our data suggest that levodopa-induced dyskinesia results from increased dopamine D(1) receptor-mediated transmission at the level of the direct pathway.
authors.affiliation: Centre National de la Recherche Scientifique Unite Mixte de Recherche 5541, Bordeaux Cedex, France.
authors.forename: Incarnation
authors.initials: I
authors.lastname: Aubert
authors.forename: Céline
authors.initials: C
authors.lastname: Guigoni
authors.forename: Kerstin
authors.initials: K
authors.lastname: Håkansson
authors.forename: Qin
authors.initials: Q
authors.lastname: Li
authors.forename: Sandra
authors.initials: S
authors.lastname: Dovero
authors.forename: Nicole
authors.initials: N
authors.lastname: Barthe
authors.forename: Bernard H
authors.initials: BH
authors.lastname: Bioulac
authors.forename: Christian E
authors.initials: CE
authors.lastname: Gross
authors.forename: Gilberto
authors.initials: G
authors.lastname: Fisone
authors.forename: Bertrand
authors.initials: B
authors.lastname: Bloch
authors.forename: Erwan
authors.initials: E
authors.lastname: Bezard
mesh_terms: D015632:1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine / Q000494:pharmacology; D015647:2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine / Q000494:pharmacology; D000704:Analysis of Variance; D000818:Animals; D000978:Antiparkinson Agents / Q000009:adverse effects*; D001345:Autoradiography / Q000379:methods; D001522:Behavior, Animal; D015153:Blotting, Western / Q000379:methods; D051360:Cyclin-Dependent Kinase 5; D018844:Cyclin-Dependent Kinases; D004195:Disease Models, Animal; D050483:Dopamine Plasma Membrane Transport Proteins; D051937:Dopamine and cAMP-Regulated Phosphoprotein 32; D004305:Dose-Response Relationship, Drug; D004347:Drug Interactions; D004409:Dyskinesia, Drug-Induced / Q000209:etiology* / Q000378:metabolism; D005260:Female; D016244:Guanosine 5'-O-(3-Thiotriphosphate) / Q000493:pharmacokinetics; D007150:Immunohistochemistry / Q000379:methods; D017403:In Situ Hybridization / Q000379:methods; D007554:Isotopes / Q000493:pharmacokinetics; D007980:Levodopa / Q000009:adverse effects*; D008252:Macaca fascicularis; D008562:Membrane Glycoproteins / Q000378:metabolism; D026901:Membrane Transport Proteins / Q000378:metabolism; D009043:Motor Activity / Q000187:drug effects; D009419:Nerve Tissue Proteins / Q000378:metabolism; D009662:Nortropanes / Q000493:pharmacokinetics; D020734:Parkinsonian Disorders / Q000188:drug therapy / Q000378:metabolism / Q000503:physiopathology; D010750:Phosphoproteins / Q000378:metabolism; D011869:Radioligand Assay / Q000379:methods; D017447:Receptors, Dopamine D1 / Q000819:agonists / Q000235:genetics / Q000378:metabolism*; D017448:Receptors, Dopamine D2 / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects*; D013378:Substantia Nigra / Q000187:drug effects / Q000378:metabolism; D013997:Time Factors; D014446:Tyrosine 3-Monooxygenase / Q000378:metabolism
chemical_list: D000978:Antiparkinson Agents; D050483:Dopamine Plasma Membrane Transport Proteins; D051937:Dopamine and cAMP-Regulated Phosphoprotein 32; D007554:Isotopes; D008562:Membrane Glycoproteins; D026901:Membrane Transport Proteins; C113010:N-(3-iodoprop-2-enyl)-2-beta-carbomethoxy-3-(4-methylphenyl)nortropane; D009419:Nerve Tissue Proteins; D009662:Nortropanes; D010750:Phosphoproteins; D017447:Receptors, Dopamine D1; D017448:Receptors, Dopamine D2; D016244:Guanosine 5'-O-(3-Thiotriphosphate); D007980:Levodopa; D015647:2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine; D015632:1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine; D014446:Tyrosine 3-Monooxygenase; D051360:Cyclin-Dependent Kinase 5; D018844:Cyclin-Dependent Kinases