Phosphodiesterase 10A Inhibition Modulates the Corticostriatal Activity and L-DOPA-Induced Dyskinesia

Autor(es)

Guimaraes, Rayanne Poletti ; Ribeiro, Danilo Leandro ; Dos Santos, Keila Bariotto ; Talarico, Carlos Henrique Zanello ; Godoy, Livea Dornela ; Padovan-Neto, Fernando E.

• Tipo de documento: Artigo Científico
• Fonte: PHARMACEUTICALS; v. 15, n. 8, p. 20-pg., 2022-08-01.

Resumo

The facilitation of corticostriatal transmission is modulated by the pharmacological inhibition of striatal phosphodiesterase 10A (PDE10A). Since L-DOPA-induced dyskinesia is associated with abnormal corticostriatal transmission, we hypothesized that inhibition of PDE10A would modulate L-DOPA-induced dyskinesia (LID) by regulating corticostriatal activity. 6-OHDA-lesioned rats were chronically treated with L-DOPA for one week. After that, for two additional weeks, animals were treated with the PDE10A inhibitor PDM-042 (1 and 3 mg/kg) one hour before L-DOPA. Behavioral analyses were performed to quantify abnormal involuntary movements (AIMs) and to assess the antiparkinsonian effects of L-DOPA. Single-unit extracellular electrophysiological recordings were performed in vivo to characterize the responsiveness of MSNs to cortical stimulation. The low dose of PDM-042 had an antidyskinetic effect (i.e., attenuated peak-dose dyskinesia) and did not interfere with cortically evoked spike activity. Conversely, the high dose of PDM-042 did not affect peak-dose dyskinesia, prolonged AIMs, and increased cortically evoked spike activity. These data suggest that the facilitation of corticostriatal transmission is likely to contribute to the expression of AIMs. Therefore, cyclic nucleotide manipulation is an essential target in controlling LID. (AU)

• Processo FAPESP: 18/12956-5 - Papel da enzima fosfodiesterase 10A na atividade dos neurônios espinhosos médios estriatais durante a ocorrência das discinesias induzidas pela L-DOPA
• Beneficiário: Rayanne Poletti Guimarães
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 19/04188-0 - Papel da enzima óxido nítrico sintase neuronal na atividade dos neurônios espinhosos médios estriatais durante a ocorrência das discinesias induzidas pela L-DOPA
• Beneficiário: Danilo Leandro Ribeiro
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 19/03754-2 - Papel das enzimas óxido nítrico sintase neuronal e fosfodiesterase 10a na atividade dos neurônios espinhosos médios estriatais durante a ocorrência das discinesias induzidas pela L-DOPA
• Beneficiário: Lívea Dornela Godoy
• Modalidade de apoio: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico
• Processo FAPESP: 19/24392-1 - Papel das enzimas óxido nítrico sintase neuronal e fosfodiesterase 10a na atividade dos neurônios espinhosos médios estriatais durante a ocorrência das discinesias induzidas pela L-DOPA
• Beneficiário: Keila Dayane Bariotto dos Santos
• Modalidade de apoio: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico