Influence of omega-3 fatty acid status on the way rats adapt to chronic restraint stress

Omega-3 fatty acids are important for several neuronal and cognitive functions. Altered omega-3 fatty acid status has been implicated in reduced resistance to stress and mood disorders. We therefore evaluated the effects of repeated restraint stress (6 h/day for 21 days) on adult rats fed omega-3 de...

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Veröffentlicht in:PloS one 2012-07, Vol.7 (7), p.e42142-e42142
Hauptverfasser: Hennebelle, Marie, Balasse, Laure, Latour, Alizée, Champeil-Potokar, Gaelle, Denis, Stéphanie, Lavialle, Monique, Gisquet-Verrier, Pascale, Denis, Isabelle, Vancassel, Sylvie
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creator Hennebelle, Marie
Balasse, Laure
Latour, Alizée
Champeil-Potokar, Gaelle
Denis, Stéphanie
Lavialle, Monique
Gisquet-Verrier, Pascale
Denis, Isabelle
Vancassel, Sylvie
description Omega-3 fatty acids are important for several neuronal and cognitive functions. Altered omega-3 fatty acid status has been implicated in reduced resistance to stress and mood disorders. We therefore evaluated the effects of repeated restraint stress (6 h/day for 21 days) on adult rats fed omega-3 deficient, control or omega-3 enriched diets from conception. We measured body weight, plasma corticosterone and hippocampus glucocorticoid receptors and correlated these data with emotional and depression-like behaviour assessed by their open-field (OF) activity, anxiety in the elevated-plus maze (EPM), the sucrose preference test and the startle response. We also determined their plasma and brain membrane lipid profiles by gas chromatography. Repeated restraint stress caused rats fed a control diet to lose weight. Their plasma corticosterone increased and they showed moderate behavioural changes, with increases only in grooming (OF test) and entries into the open arms (EPM). Rats fed the omega-3 enriched diet had a lower stress-induced weight loss and plasma corticosterone peak, and reduced grooming. Rats chronically lacking omega-3 fatty acid exhibited an increased startle response, a stress-induced decrease in locomotor activity and exaggerated grooming. The brain omega-3 fatty acids increased as the dietary omega-3 fatty acids increased; diets containing preformed long-chain omega-3 fatty acid were better than diets containing the precursor alpha-linolenic acid. However, the restraint stress reduced the amounts of omega-3 incorporated. These data showed that the response to chronic restraint stress was modulated by the omega-3 fatty acid supply, a dietary deficiency was deleterious while enrichment protecting against stress.
doi_str_mv 10.1371/journal.pone.0042142
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Gaelle</au><au>Denis, Stéphanie</au><au>Lavialle, Monique</au><au>Gisquet-Verrier, Pascale</au><au>Denis, Isabelle</au><au>Vancassel, Sylvie</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Influence of omega-3 fatty acid status on the way rats adapt to chronic restraint stress</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2012-07-30</date><risdate>2012</risdate><volume>7</volume><issue>7</issue><spage>e42142</spage><epage>e42142</epage><pages>e42142-e42142</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>Omega-3 fatty acids are important for several neuronal and cognitive functions. Altered omega-3 fatty acid status has been implicated in reduced resistance to stress and mood disorders. We therefore evaluated the effects of repeated restraint stress (6 h/day for 21 days) on adult rats fed omega-3 deficient, control or omega-3 enriched diets from conception. We measured body weight, plasma corticosterone and hippocampus glucocorticoid receptors and correlated these data with emotional and depression-like behaviour assessed by their open-field (OF) activity, anxiety in the elevated-plus maze (EPM), the sucrose preference test and the startle response. We also determined their plasma and brain membrane lipid profiles by gas chromatography. Repeated restraint stress caused rats fed a control diet to lose weight. Their plasma corticosterone increased and they showed moderate behavioural changes, with increases only in grooming (OF test) and entries into the open arms (EPM). Rats fed the omega-3 enriched diet had a lower stress-induced weight loss and plasma corticosterone peak, and reduced grooming. Rats chronically lacking omega-3 fatty acid exhibited an increased startle response, a stress-induced decrease in locomotor activity and exaggerated grooming. The brain omega-3 fatty acids increased as the dietary omega-3 fatty acids increased; diets containing preformed long-chain omega-3 fatty acid were better than diets containing the precursor alpha-linolenic acid. However, the restraint stress reduced the amounts of omega-3 incorporated. These data showed that the response to chronic restraint stress was modulated by the omega-3 fatty acid supply, a dietary deficiency was deleterious while enrichment protecting against stress.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>22860066</pmid><doi>10.1371/journal.pone.0042142</doi><tpages>e42142</tpages><orcidid>https://orcid.org/0000-0003-4449-1377</orcidid><orcidid>https://orcid.org/0000-0003-0208-5135</orcidid><orcidid>https://orcid.org/0000-0003-0170-2963</orcidid><orcidid>https://orcid.org/0000-0003-2086-7042</orcidid><oa>free_for_read</oa></addata></record>
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identifier ISSN: 1932-6203
ispartof PloS one, 2012-07, Vol.7 (7), p.e42142-e42142
issn 1932-6203
1932-6203
language eng
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source MEDLINE; DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central; Free Full-Text Journals in Chemistry; Public Library of Science (PLoS)
subjects Agriculture
Animal cognition
Animals
Anxiety
Behavior, Animal
Biology
Body Weight
Body weight loss
Brain
Brain research
Chromatography, Gas
Cognitive ability
Corticosterone
Corticosterone - blood
Depression (Mood disorder)
Diet
Emotional behavior
Emotional disorders
Enrichment
Fatty acids
Fatty Acids, Omega-3 - metabolism
Female
Gas chromatography
Glucocorticoid receptors
Grooming
Hippocampus - metabolism
Immobilization
Life Sciences
Linolenic acid
Linolenic acids
Locomotor activity
Medicine
Mental depression
Middle age
Mood
Neurons and Cognition
Neurosciences
Nutrient deficiency
Nutrition research
Omega 3 fatty acids
Open-field behavior
Rats
Rats, Wistar
Receptors
Receptors, Glucocorticoid - metabolism
Reducing diets
Rodents
Social and Behavioral Sciences
Startle response
Stress
Stress (Psychology)
Stress, Physiological
Stresses
Sucrose
Sugar
Veterinary Science
Weight reduction
title Influence of omega-3 fatty acid status on the way rats adapt to chronic restraint stress
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