Late aging-associated increases in L-DOPA-induced dyskinesia are accompanied by heightened neuroinflammation in the hemi-parkinsonian rat.
Neurobiol Aging
; 81: 190-199, 2019 09.
Article
en En
| MEDLINE
| ID: mdl-31306813
ABSTRACT
Aging is a primary risk factor for the development of Parkinson's disease (PD), and aging differentially predicts the incidence of L-DOPA-induced dyskinesia (LID). The goal of this work was to establish whether late aging-associated exacerbation of LID would be related to neuroinflammation in the hemi-parkinsonian rat. Two studies were conducted in which adult (3 months) and aged (18 months) male Fischer 344 rats bearing unilateral 6-hydroxydopamine lesions of the medial forebrain bundle were injected acutely with vehicle or L-DOPA (6 mg/kg). LID was quantified, and neuroinflammation was assessed postmortem via gene expression markers in the striatum (experiment 1) or through concurrent large-molecule microdialysis (experiment 2). In addition to exacerbating LID despite similar levels of striatal dopamine loss, late aging was associated with persistently elevated IL-1ß gene expression ipsilateral to lesion, as well as a trend toward greater extracellular concentrations of IL-1ß in response to acute L-DOPA treatment. In contrast, aged sham-operated rats displayed greater extracellular IL-6. Taken together, these data demonstrate an age-related vulnerability to LID and highlight potential neuroinflammatory mediators associated with these effects.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Enfermedad de Parkinson
/
Envejecimiento
/
Levodopa
/
Discinesia Inducida por Medicamentos
Tipo de estudio:
Etiology_studies
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Animals
Idioma:
En
Revista:
Neurobiol Aging
Año:
2019
Tipo del documento:
Article
País de afiliación:
Estados Unidos