Selective alterations of brain dopamine D(2) receptor binding in cirrhotic patients: results of a (11)C-N-methylspiperone PET study.
Metab Brain Dis
; 23(3): 265-74, 2008 Sep.
Article
en En
| MEDLINE
| ID: mdl-18686022
Alterations of the brain dopamine system have been implicated in the neurological complications of chronic liver failure. The present study was aimed at the measurement of dopamine D(2) binding sites in cirrhotic patients by positron emission tomography (PET) using (11)C-N-methylspiperone as ligand. The regions of interest (ROI) were designated on a three-dimensional stereotaxic ROI template (3DSRT). The pixel values of twelve ROIs corrected by the pixel value of the cerebellum after 80 min static scanning were used to quantitate changes in binding. D(2) binding sites were significantly decreased in the hippocampus and thalamus of cirrhotic patients and were positively correlated with serum bilirubin levels and Child-Pugh scores and were negatively correlated with prothrombin times (thalamus). Loss of D(2) sites was greater in thalamus and hippocampus of alcoholic cirrhotics compared to non-alcoholics. Statistically significant correlations were also observed between D(2) binding sites in hippocampus, thalamus and lenticular nuclei and history of overt encephalopathy. These findings suggest that D(2) receptor binding in some regions of brain in cirrhotic patients is influenced by factors such as the severity of liver damage and history of alcohol dependency or overt encephalopathy. Alterations of D(2) receptor sites indicative of dopaminergic synaptic dysfunction could play an important role in the pathogenesis of the cognitive and motor disturbances associated with chronic liver failure.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Espiperona
/
Encéfalo
/
Química Encefálica
/
Receptores de Dopamina D2
/
Radiofármacos
/
Cirrosis Hepática
Tipo de estudio:
Prognostic_studies
Límite:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Metab Brain Dis
Asunto de la revista:
CEREBRO
/
METABOLISMO
Año:
2008
Tipo del documento:
Article
País de afiliación:
Japón
Pais de publicación:
Estados Unidos