Biochemical and physiological validation of a corticosteroid radioimmunoassay for plasma and fecal samples in oldfield mice (Peromyscus polionotus).
Physiol Behav
; 80(2-3): 405-11, 2003 Nov.
Article
en En
| MEDLINE
| ID: mdl-14637242
ABSTRACT
The measurement of fecal steroids provides an increasingly important noninvasive technique for assessing reproduction, environmental stress, and aggression in populations of captive and free-living animals. In this paper, we validated the corticosterone (CORT) 125I-radioimmunoassay (ICN Pharmaceuticals) for plasma and fecal samples in a small rodent species, the oldfield mouse (Peromyscus polionotus subgriseus). The biochemical validations indicated that the assays accurately measured CORT concentrations in the plasma and corticosteroid concentrations in the feces. Physiological validation demonstrated that (1) blood samples collected within 3 min of disturbing an animal's cage represented "baseline" CORT concentrations, and (2) fecal corticosteroid concentrations collected over a 24-h period closely tracked plasma CORT concentrations approximately 4 h earlier. These results demonstrate that the plasma CORT and fecal corticosteroid assays are sensitive enough to detect biologically meaningful alterations in corticosteroid concentrations in oldfield mice.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Sensibilidad y Especificidad
/
Corticoesteroides
/
Heces
Tipo de estudio:
Diagnostic_studies
Límite:
Animals
Idioma:
En
Revista:
Physiol Behav
Año:
2003
Tipo del documento:
Article
País de afiliación:
Estados Unidos