| Full text | |
| Author(s): |
Guimaraes, Rayanne Poletti
;
Ribeiro, Danilo Leandro
;
Dos Santos, Keila Bariotto
;
Talarico, Carlos Henrique Zanello
;
Godoy, Livea Dornela
;
Padovan-Neto, Fernando E.
Total Authors: 6
|
| Document type: | Journal article |
| Source: | PHARMACEUTICALS; v. 15, n. 8, p. 20-pg., 2022-08-01. |
| Abstract | |
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) | |
| FAPESP's process: | 18/12956-5 - Role of phosphodiesterase 10A in striatal medium spiny neuron activity during L-DOPA-induced dyskinesia |
| Grantee: | Rayanne Poletti Guimarães |
| Support Opportunities: | Scholarships in Brazil - Master |
| FAPESP's process: | 19/04188-0 - Role of neuronal nitric oxide synthase in striatal medium spiny neuron activity during the occurrence of L-DOPA-induced dyskinesia |
| Grantee: | Danilo Leandro Ribeiro |
| Support Opportunities: | Scholarships in Brazil - Master |
| FAPESP's process: | 19/03754-2 - Role of neuronal nitric oxide synthase and phosphodiesterase 10A in striatal medium spiny neuron activity during L-DOPA-induced dyskinesia |
| Grantee: | Lívea Dornela Godoy |
| Support Opportunities: | Scholarships in Brazil - Technical Training Program - Technical Training |
| FAPESP's process: | 19/24392-1 - Role of neuronal nitric oxide synthase and phosphodiesterase 10A in striatal medium spiny neuron activity during L-DOPA-induced dyskinesia |
| Grantee: | Keila Dayane Bariotto dos Santos |
| Support Opportunities: | Scholarships in Brazil - Technical Training Program - Technical Training |