Effects of p-chlorophenylalanine-induced depletion of brain serotonin on retrieval of appetitive and aversive memories.
Indian J Exp Biol
;
1995 Nov; 33(11): 837-40
Article
Dans Anglais
| IMSEAR
| ID: sea-61405
ABSTRACT
This study examined whether depletion of central serotonin produces an improved retrieval of aversive memories in the same way as pre-exposure to inescapable footshocks, in rats. Animals conditioned in a T-maze with appetitive (10% sucrose) and aversive (2.0 mA footshock) events were given i.c.v. 24 hr later a single dose of p-chlorophenylalanine (p-CPA). (100, 200, 400 micrograms/rat) or drug vehicle. The retention performance and activity were assessed 48 hr after treatment with this depletor. While lower doses of p-CPA selectively reduced serotonin levels in striatum and anterior cortex, higher doses reduced both serotonin and norepinephrine levels in hippocampus in a dose-dependent fashion. The depletor however, failed to produce a differential improvement of aversive memory retrieval. On the contrary, p-CPA reduced the latency to enter both, previously shocked and appetitively reinforced, goalboxes. The enhanced traversing behaviour in T-maze, together with an increased central entry in the open field that observed in depleted groups, might suggest an anxiolytic activity of p-CPA.
Texte intégral:
Disponible
Indice:
IMSEAR (Asie du Sud-Est)
Sujet Principal:
Comportement appétitif
/
Rats
/
Encéphale
/
Mâle
/
Distribution tissulaire
/
Sérotonine
/
Rat Wistar
/
Fenclonine
/
Agents sérotoninergiques
/
Animaux
langue:
Anglais
Texte intégral:
Indian J Exp Biol
Année:
1995
Type:
Article
Documents relatifs à ce sujet
MEDLINE
...
LILACS
LIS