Validation of a psychosocial chronic stress model in the pig using a multidisciplinary approach at the gut-brain and behavior levels
Autor: | Menneson, Sophie, Ménicot, Samuel, Ferret-Bernard, Stéphanie, Guérin, Sylvie, Romé, Véronique, Le Normand, Laurence, Randuineau, Gwénaëlle, Gambarota, Giulio, Noirot, Virginie, Etienne, Pierre, Coquery, Nicolas, Val-Laillet, David |
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Přispěvatelé: | Nutrition, Métabolismes et Cancer (NuMeCan), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Auteur indépendant, N° 2016/0891, Association Nationale de la Recherche et de la Technologie, ProdInra, Archive Ouverte, Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoires Phodé, Laboratoire Traitement du Signal et de l'Image (LTSI), Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM) |
Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
Monoamines
neurogénèse Neurogenesis [SDV]Life Sciences [q-bio] imagerie cerebrale Depression Antidepressant Behavior Neuroimaging HPA axis Microbiota comportement dépression monoamine microbiote antidépresseur animal modèle Original Research axe hypothalamo hypophysio surrénal animal model swine [SDV] Life Sciences [q-bio] depressions antidepressants stress chronique Neuroscience porc |
Zdroj: | Frontiers in Behavioral Neuroscience (13), . (2019) Frontiers in Behavioral Neuroscience Frontiers in Behavioral Neuroscience, Frontiers, 2019, 13, pp.161. ⟨10.3389/fnbeh.2019.00161⟩ Frontiers in Behavioral Neuroscience, 2019, 13, pp.161. ⟨10.3389/fnbeh.2019.00161⟩ |
ISSN: | 1662-5153 |
Popis: | International audience; Psychological chronic stress is an important risk factor for major depressive disorder, of which consequences have been widely studied in rodent models. This work aimed at describing a pig model of chronic stress based on social isolation, environmental impoverishment and unpredictability. Three groups of animals of both sexes were constituted. Two were exposed to the psychosocial stressors while receiving (SF, n = 12) or not (SC, n = 22) the antidepressant fluoxetine, and a third group (NSC, n = 22) remained unstressed. Animals were observed in home pens and during dedicated tests to assess resignation and anxiety-like behaviors. Brain structure and function were evaluated via proton MRS and fMRI. Hippocampal molecular biology and immunodetection of cellular proliferation (Ki67+) and neuron maturation (DCX+) in the dentate gyrus were also performed. Salivary cortisol, fecal short-chain fatty acids (SCFAs), and various plasmatic and intestinal biomarkers were analyzed. Compared to NSC, SC animals showed more resignation (p = 0.019) and had a higher level of salivary cortisol (p = 0.020). SC brain responses to stimulation by a novel odor were lower, similarly to their hippocampal neuronal density (p = 0.015), cellular proliferation (p = 0.030), and hippocampal levels of BDNF and 5-HT1AR (p = 0.056 and p = 0.007, respectively). However, the number of DCX+ cells was higher in the ventral dentate gyrus in this group (p = 0.025). In addition, HOMA-IR was also higher (p < 0.001) and microbiota fermentation activity was lower (SCFAs, SC/NSC: p < 0.01) in SC animals. Fluoxetine partially or totally reversed several of these effects. Exposure to psychosocial stressors in the pig model induced effects consistent with the human and rodent literature, including resignation behavior and alterations of the HPA axis and hippocampus. This model opens the way to innovative translational research exploring the mechanisms of chronic stress and testing intervention strategies with good face validity related to human. |
Databáze: | OpenAIRE |
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