Soft-diet feeding decreases dopamine release and impairs aversion learning in Alzheimer model rats.
Neurosci Lett
; 439(2): 208-11, 2008 Jul 11.
Article
em En
| MEDLINE
| ID: mdl-18514408
ABSTRACT
To examine the effects of soft-diet feeding on the dopaminergic system in a model rat for Alzheimer's disease (AD), we measured dopamine release in the hippocampus using a microdialysis approach and assessed learning ability and memory using step-through passive avoidance tests. Furthermore, we immunohistochemically examined the ventral tegmental area (VTA), which is the origin of hippocampal dopaminergic fibers using tyrosine hydroxylase (TH), a marker enzyme for the dopaminergic nervous system. Feeding a soft diet decreased dopamine release in the hippocampus and impaired learning ability and memory in AD model rats in comparison with rats fed a hard diet; however, TH-immunopositive profiles in the VTA seemed not to be notably different between rats fed a soft diet and those fed a hard diet. These observations suggest that soft-diet feeding enhances the impairment of learning ability and memory through the decline of dopamine release in the hippocampus in AD rats.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Aprendizagem da Esquiva
/
Dopamina
/
Dieta
Tipo de estudo:
Etiology_studies
Limite:
Animals
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article