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Chronic high-fat diet increases acute neuroendocrine stress response independently of prenatal dexamethasone treatment in male rats

Acta neuropsychiatrica, 2014-02, Vol.26 (1), p.8-18 [Peer Reviewed Journal]

Copyright © Scandinavian College of Neuropsychopharmacology 2013 ;ISSN: 0924-2708 ;EISSN: 1601-5215 ;DOI: 10.1017/neu.2013.28 ;PMID: 25142095

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Title:
Chronic high-fat diet increases acute neuroendocrine stress response independently of prenatal dexamethasone treatment in male rats
Author: Abildgaard, Anders ; Lund, Sten ; Hougaard, Karin S
Subjects: Acoustics ; Animals ; Blood Glucose ; Corticosterone - blood ; Depression - metabolism ; Dexamethasone - toxicity ; Diabetes ; Diet ; Diet, High-Fat ; Disease Models, Animal ; Female ; Fetal Growth Retardation - chemically induced ; Fetal Growth Retardation - metabolism ; Fetal Growth Retardation - physiopathology ; Glucose ; Hypothalamo-Hypophyseal System - metabolism ; Insulin - blood ; Male ; Males ; Metabolic syndrome ; Motor Activity - physiology ; Original Articles ; Pituitary-Adrenal System - metabolism ; Rats ; Rats, Wistar ; Schizophrenia ; Steroids ; Stress ; Stress, Physiological ; Swimming ; Weaning
Is Part Of: Acta neuropsychiatrica, 2014-02, Vol.26 (1), p.8-18
Description: Intrauterine growth restriction (IUGR) has been associated with metabolic disorders later in life such as obesity and diabetes as well as psychiatric disorders such as depression and schizophrenia. Therefore, we wanted to investigate whether behavioural, metabolic or neuroendocrine abnormalities could be provoked or exacerbated by a high-fat diet (HFD) in an experimental model of IUGR. Pregnant dams were exposed to dexamethasone (DEX) in the third gestational week to induce IUGR. Late adolescent male offspring of DEX- and vehicle-treated dams were then fed a HFD or standard chow for 8 weeks and subjected to a variety of assessments. Only diet affected the hypothalamus-pituitary-adrenal (HPA) axis stress response, as HFD doubled the observed corticosterone levels following acute restraint. HFD and prenatal DEX exposure concomitantly exacerbated depressive-like behaviour in the forced swim test, even though no interaction was seen. Prenatal DEX treatment tended to increase the basal acoustic startle response (ASR), while an interaction between HFD and DEX was present in the ASR pre-pulse inhibition suggestive of fundamental changes in neuronal gating mechanisms. Metabolic parameters were only affected by diet, as HFD increased fasting glucose and insulin levels. We conclude that chronic HFD may be more important in programming of the HPA axis stress responsiveness than an adverse foetal environment and therefore potentially implies an increased risk for developing psychiatric and metabolic disease.
Publisher: Cambridge, UK: Cambridge University Press
Language: English;Dutch
Identifier: ISSN: 0924-2708
EISSN: 1601-5215
DOI: 10.1017/neu.2013.28
PMID: 25142095
Source: ProQuest One Psychology
MEDLINE
ProQuest Central

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Chronic high-fat diet increases acute neuroendocrine stress response independently of prenatal dexamethasone treatment in male rats

Copyright © Scandinavian College of Neuropsychopharmacology 2013 ;ISSN: 0924-2708 ;EISSN: 1601-5215 ;DOI: 10.1017/neu.2013.28 ;PMID: 25142095

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