Increased ACTH and corticosterone secretion induced by different methods of paradoxical sleep deprivation.
J Sleep Res
; 7(4): 276-81, 1998 Dec.
Article
en En
| MEDLINE
| ID: mdl-9844854
ABSTRACT
The methods used to induce paradoxical sleep (PS) deprivation are believed to be stressful. In the present study, two methods were compared in regard to their ability to activate the hypothalamic-pituitary-adrenal (HPA) axis. Animals were placed on multiple large (MLP) or small (MSP) platforms or on single large (SLP) or small (SSP) platforms and blood sampled at the end of a 4-day period of PS deprivation (experiment 1) or on Days 1 (short-term) and 4 (long-term) of PS deprivation (experiment 2). ACTH and corticosterone (CORT) levels were determined by RIA. The results of experiment 1 showed that all experimental animals presented increased ACTH response, compared to controls. CORT levels, however, were only elevated in MSP animals, suggesting increased adrenal sensitivity. Experiment 2 showed that ACTH levels of MSP animals were higher than MLP and SSP animals, and that animals placed on the multiple platform tanks showed the highest ACTH levels on Day 4 of manipulation. CORT levels were elevated in the animals kept over small platforms, and these levels where higher on Day 1 than basal and further elevated on Day 4 of PS deprivation. These results indicate that the multiple platform technique induces a distinct activation of the HPA axis, and that PS deprivation may act as an additional stressor.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Sistema Hipófiso-Suprarrenal
/
Privación de Sueño
/
Sueño REM
/
Corticosterona
/
Hormona Adrenocorticotrópica
/
Sistema Hipotálamo-Hipofisario
Límite:
Animals
Idioma:
En
Revista:
J Sleep Res
Asunto de la revista:
PSICOFISIOLOGIA
Año:
1998
Tipo del documento:
Article
País de afiliación:
Brasil