title: Beyond the basal ganglia: cFOS expression in the cerebellum in response to acute and chronic dopaminergic alterations.
abstract: The suggestion of an anatomical and functional relationship between the basal ganglia and cerebellum is recent. Traditionally, these structures were considered as neuronal circuits working separately to organize and control goal-directed movements and cognitive functions. However, several studies in rodents and primates have described an anatomical interaction between cortico-basal and cortico-cerebellar networks. Most importantly, functional changes have been observed in one of these circuits when altering the other one. In this context, we aimed to accomplish an extensive description of cerebellar activation patterns using cFOS expression (cFOS-IR) after acute and chronic manipulation of dopaminergic activity. In the acute study, substantia nigra pars compacta (SNc) activity was stimulated or suppressed by intra cerebral administration of picrotoxin or lidocaine, respectively. In addition, we analyzed cerebellar activity after the induction of a parkinsonism model, the tremulous jaw movements. In this model, tremulous jaw movements were induced in male rats by IP chronic administration of the dopamine antagonist haloperidol (1.5mg/kg). Acute stimulation of SNc by picrotoxin increased cFOS-IR in the vermis and cerebellar hemispheres. However, lidocaine did not produce an effect. After 14days of haloperidol treatment, the vermis and cerebellar hemispheres showed an opposite regulation of cFOS expression. Chronic dopaminergic antagonism lessened cFOS expression in the vermis but up-regulated such expression in the cerebellar hemisphere. Overall, the present data indicate a very close functional relationship between the basal ganglia and the cerebellum and they may allow a better understanding of disorders in which there are dopamine alterations.
authors.affiliation: Postgrado en Neuroetología, Instituto de Neuroetología, Universidad Veracruzana, Xalapa, Ver., Mexico.
authors.forename: G
authors.initials: G
authors.lastname: Herrera-Meza
authors.affiliation: Postgrado en Neuroetología, Instituto de Neuroetología, Universidad Veracruzana, Xalapa, Ver., Mexico.
authors.forename: L
authors.initials: L
authors.lastname: Aguirre-Manzo
authors.affiliation: Centro de Investigaciones Cerebrales, Universidad Veracruzana, Xalapa, Ver., Mexico.
authors.forename: G A
authors.initials: GA
authors.lastname: Coria-Avila
authors.affiliation: Centro de Investigaciones Cerebrales, Universidad Veracruzana, Xalapa, Ver., Mexico.
authors.forename: M L
authors.initials: ML
authors.lastname: Lopez-Meraz
authors.affiliation: Centro de Investigaciones Cerebrales, Universidad Veracruzana, Xalapa, Ver., Mexico.
authors.forename: R
authors.initials: R
authors.lastname: Toledo-Cárdenas
authors.affiliation: Centro de Investigaciones Cerebrales, Universidad Veracruzana, Xalapa, Ver., Mexico.
authors.forename: J
authors.initials: J
authors.lastname: Manzo
authors.affiliation: Centro de Investigaciones Cerebrales, Universidad Veracruzana, Xalapa, Ver., Mexico.
authors.forename: L I
authors.initials: LI
authors.lastname: Garcia
authors.affiliation: Área de Psicobiología, Universidad Jaume I, Castellón, Spain. Electronic address: miquel@psb.uji.es.
authors.forename: M
authors.initials: M
authors.lastname: Miquel
mesh_terms: D000704:Analysis of Variance; D000779:Anesthetics, Local / Q000494:pharmacology; D000818:Animals; D002531:Cerebellum / Q000187:drug effects / Q000378:metabolism*; D004298:Dopamine / Q000378:metabolism*; D004576:Electromyography; D007839:Functional Laterality; D018756:GABA Antagonists / Q000494:pharmacology; D007568:Jaw; D008012:Lidocaine / Q000494:pharmacology; D008297:Male; D008845:Microinjections; D009068:Movement / Q000187:drug effects; D009434:Neural Pathways / Q000502:physiology; D010852:Picrotoxin / Q000494:pharmacology; D016760:Proto-Oncogene Proteins c-fos / Q000378:metabolism*; D051381:Rats; D017208:Rats, Wistar; D013378:Substantia Nigra / Q000502:physiology*; D013644:Tartrates / Q000494:pharmacology
chemical_list: D000779:Anesthetics, Local; D004298:Dopamine; D018756:GABA Antagonists; D008012:Lidocaine; D010852:Picrotoxin; D016760:Proto-Oncogene Proteins c-fos; D013644:Tartrates; C029768:tartaric acid
keywords: cerebellum; dopamine; haloperidol; picrotoxin; substantia nigra