Beta1-adrenergic receptor mediation in the lichen glucan PB-2-induced enhancement of long-term potentiation in the rat dentate gyrus in vivo.
Neurosci Res
; 53(4): 363-8, 2005 Dec.
Article
em En
| MEDLINE
| ID: mdl-16182397
ABSTRACT
The mechanism underlying the enhancement of long-term potentiation (LTP) induced by the systemic administration of PB-2, an alpha(1-3)(1-4)glucan-containing fraction extracted from the lichen Flavoparmelia baltimorensis and a putative LTP-enhancing agent, was investigated in the rat dentate gyrus in vivo. Particular attention was paid to the role of adrenaline beta-receptors. An intravenous (i.v.) injection of PB-2 enhanced the induction of LTP, which was in turn inhibited by an i.v. injection of the adrenaline beta1-receptor antagonist atenolol. An intracerebroventricular injection of atenolol did not affect the induction of LTP, but completely suppressed the PB-2-induced enhancement of LTP. The infusion of atenolol into the recording site attenuated the PB-2-induced facilitation of LTP. These results suggest that the adrenaline beta1-receptors contribute to the enhancement of LTP induced by the systemic administration of PB-2, and that the functional beta1-receptors are located both centrally and peripherally.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Receptores Adrenérgicos
/
Potenciação de Longa Duração
/
Giro Denteado
/
Beta-Glucanas
/
Líquens
Limite:
Animals
Idioma:
En
Revista:
Neurosci Res
Ano de publicação:
2005
Tipo de documento:
Article