The guinea pig forced swim test as a new behavioral despair model to characterize potential antidepressants.
Psychopharmacology (Berl)
; 195(1): 95-102, 2007 Nov.
Article
en En
| MEDLINE
| ID: mdl-17646967
ABSTRACT
RATIONALE Behavioral despair is a model of high predictivity for antidepressant activity in murids. For some drug targets, guinea pigs exhibit a higher homology to their human counterparts compared to murids. OBJECTIVES:
In this paper, we established a model of behavioral despair namely, the forced swim test (FST) in guinea pigs. MATERIALS ANDMETHODS:
Male guinea pigs underwent the FST similar to rats. Animals received intraperitoneal injections of either vehicle or drugs 24, 4, and 0.5 h before testing. We tested the tricyclic antidepressants desipramine and amitriptyline, the monoamine oxidase inhibitor tranylcypromine, the selective serotonin reuptake inhibitors fluoxetine and paroxetine, and the neurokinin 1 (NK(1)) receptor antagonist, L-733,060, and for comparison the antipsychotic clozapine and the stimulant methamphetamine.RESULTS:
Desipramine (> or =3 mg/kg) and amitriptyline (>10 mg/kg) increased the latency to immobility (LTI) to greater than 230 s, and tranylcypromine (10 mg/kg) it to greater than 190 s. Paroxetine (>0.3 mg/kg) and fluoxetine (>10 mg/kg) also increased LTI significantly but only to greater than 120 s. Methamphetamine (3 mg/kg) completely eliminated immobility, whereas clozapine (5-20 mg/kg) had no effect. L-733,060 (10 mg/kg) increased LTI to 270 s. Doses producing significant effects in FST were investigated in the open field. Antidepressants did not affect locomotion, whereas methamphetamine induced hyperlocomotion.CONCLUSIONS:
We demonstrate the suitability of a modified procedure of the FST for a nonmurid species the guinea pig. Known antidepressants showed similar effects as in rats and mice. It is interesting to note that the NK(1) antagonist L-733,060 increased forced swimming, suggesting its antidepressant potential. Thus, the guinea pig FST allows the study of antidepressant activity also in NK(1) antagonists that cannot be studied appropriately in murids.
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Bases de datos:
MEDLINE
Asunto principal:
Natación
/
Conducta Animal
/
Drogas en Investigación
/
Antidepresivos
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Psychopharmacology (Berl)
Año:
2007
Tipo del documento:
Article
País de afiliación:
Alemania