Bello, E.P.; Casas-Cordero, R.; Galiñanes, G.L.; Casey, E.; Belluscio, M.A.; Rodríguez, V.; Noaín, D.; Murer, M.G.; Rubinstein, M."Inducible ablation of dopamine D2 receptors in adult mice impairs locomotion, motor skill learning and leads to severe parkinsonism" (2017) Molecular Psychiatry. 22(4):595-604
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Motor execution and planning are tightly regulated by dopamine D1 and D2 receptors present in basal ganglia circuits. Although stimulation of D1 receptors is known to enhance motor function, the global effect of D2 receptor (D2R) stimulation or blockade remains highly controversial, with studies showing increasing, decreasing or no changes in motor activity. Moreover, pharmacological and genetic attempts to block or eliminate D2R have led to controversial results that questioned the importance of D2R in motor function. In this study, we generated an inducible Drd2 null-allele mouse strain that circumvented developmental compensations found in constitutive Drd2 -/- mice and allowed us to directly evaluate the participation of D2R in spontaneous locomotor activity and motor learning. We have found that loss of D2R during adulthood causes severe motor impairments, including hypolocomotion, deficits in motor coordination, impaired learning of new motor routines and spontaneous catatonia. Moreover, severe motor impairment, resting tremor and abnormal gait and posture, phenotypes reminiscent of Parkinson's disease, were evident when the mutation was induced in aged mice. Altogether, the conditional Drd2 knockout model studied here revealed the overall fundamental contribution of D2R in motor functions and explains some of the side effects elicited by D2R blockers when used in neurological and psychiatric conditions, including schizophrenia, bipolar disorder, Tourette's syndrome, dementia, alcohol-induced delusions and obsessive-compulsive disorder.


Documento: Artículo
Título:Inducible ablation of dopamine D2 receptors in adult mice impairs locomotion, motor skill learning and leads to severe parkinsonism
Autor:Bello, E.P.; Casas-Cordero, R.; Galiñanes, G.L.; Casey, E.; Belluscio, M.A.; Rodríguez, V.; Noaín, D.; Murer, M.G.; Rubinstein, M.
Filiación:Instituto de Investigaciones en Ingeniería Genética y Biología Molecular, Consejo Nac. de Investigaciones Cientificas y Tecnicas and Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Vuelta de Obligado 2490, Buenos Aires, 1428, Argentina
Instituto de Fisiología y Biofísica Bernardo Houssay, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
Departamento de Fisiología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, United States
Palabras clave:dopamine 2 receptor; dopamine 1 receptor; dopamine 2 receptor; dopamine receptor blocking agent; adult; aged; animal experiment; animal model; Article; body posture; catatonia; controlled study; gene mutation; locomotion; male; motor coordination; motor dysfunction; motor learning; mouse; neurologic gait disorder; nonhuman; parkinsonism; phenotype; tremor; ablation therapy; animal; basal ganglion; corpus striatum; drug effects; genetics; human; knockout mouse; learning; locomotion; metabolism; motor activity; motor performance; parkinsonism; pathophysiology; physiology; procedures; Ablation Techniques; Animals; Basal Ganglia; Corpus Striatum; Dopamine Antagonists; Humans; Learning; Locomotion; Male; Mice; Mice, Knockout; Motor Activity; Motor Skills; Parkinsonian Disorders; Receptors, Dopamine D1; Receptors, Dopamine D2
Página de inicio:595
Página de fin:604
Título revista:Molecular Psychiatry
Título revista abreviado:Mol. Psychiatry
CAS:Dopamine Antagonists; Receptors, Dopamine D1; Receptors, Dopamine D2


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---------- APA ----------
Bello, E.P., Casas-Cordero, R., Galiñanes, G.L., Casey, E., Belluscio, M.A., Rodríguez, V., Noaín, D.,..., Rubinstein, M. (2017) . Inducible ablation of dopamine D2 receptors in adult mice impairs locomotion, motor skill learning and leads to severe parkinsonism. Molecular Psychiatry, 22(4), 595-604.
---------- CHICAGO ----------
Bello, E.P., Casas-Cordero, R., Galiñanes, G.L., Casey, E., Belluscio, M.A., Rodríguez, V., et al. "Inducible ablation of dopamine D2 receptors in adult mice impairs locomotion, motor skill learning and leads to severe parkinsonism" . Molecular Psychiatry 22, no. 4 (2017) : 595-604.
---------- MLA ----------
Bello, E.P., Casas-Cordero, R., Galiñanes, G.L., Casey, E., Belluscio, M.A., Rodríguez, V., et al. "Inducible ablation of dopamine D2 receptors in adult mice impairs locomotion, motor skill learning and leads to severe parkinsonism" . Molecular Psychiatry, vol. 22, no. 4, 2017, pp. 595-604.
---------- VANCOUVER ----------
Bello, E.P., Casas-Cordero, R., Galiñanes, G.L., Casey, E., Belluscio, M.A., Rodríguez, V., et al. Inducible ablation of dopamine D2 receptors in adult mice impairs locomotion, motor skill learning and leads to severe parkinsonism. Mol. Psychiatry. 2017;22(4):595-604.