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Pàgina inicial > Articles > Articles publicats > Adaptation of the hypothalamus-pituitary-adrenal axis to daily repeated stress does not follow the rules of habituation : |
Data: | 2015 |
Resum: | Repeated exposure to a wide range of stressors differing in nature and intensity results in a reduced response of prototypical stress markers (i. e. plasma levels of ACTH and adrenaline) after an acute challenge with the same (homotypic) stressor. This reduction has been considered to be a habituation-like phenomenon. However, direct experimental evidence for this assumption is scarce. In the present work we demonstrate in adult male rats that adaptation of the hypothalamus-pituitary-adrenal (HPA) axis to repeated stress does not follow some of the critical rules of habituation. Briefly, adaptation was stronger and faster with more severe stressors, maximally observed even with a single exposure to severe stressors, extremely long-lasting, negatively related to the interval between the exposures and positively related to the length of daily exposure. We offer a new theoretical view to explain adaptation to daily repeated stress. |
Ajuts: | Ministerio de Economía y Competitividad SAF2011-28313 Ministerio de Economía y Competitividad RD12/0028/0014 Ministerio de Ciencia e Innovación PTA 2010-3472-I Agència de Gestió d'Ajuts Universitaris i de Recerca SGR2014-1020 |
Nota: | Altres ajuts: Plan Nacional sobre Drogas (2011/021) |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article de revisió ; recerca ; Versió acceptada per publicar |
Matèria: | Habituation ; Repeated Stress ; Immobilization ; Restraint ; Water stress ; ACTH ; Corticosterone ; C-fos |
Publicat a: | Neuroscience & biobehavioral reviews, Vol. 56 (september 2015) , p. 35-49, ISSN 1873-7528 |
43 p, 1.3 MB |