Cited by 23Fatty Acid Research and HealthTreatment of Major DepressionTryptophan and brain disorders

Anxiolytic- and antidepressant-like effects of fish oil-enriched diet in brain-derived neurotrophic factor deficient mice

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Zemdegs, Juliane, Rainer, Quentin, Grossmann, Cindy P., Rousseau-Ralliard, Delphine, Grynberg, Alain, Ribeiro, Eliane, Guiard, Bruno P.·2018·Frontiers in Neuroscience

Abstract

Despite significant advances in the understanding of the therapeutic activity of antidepressant drugs, treatment-resistant depression is a public health issue prompting research to identify new therapeutic strategies. Evidence strongly suggests that nutrition might exert a significant impact on the onset, the duration and the severity of major depression. Accordingly, preclinical and clinical investigations demonstrated the beneficial effects of omega-3 fatty acids in anxiety and mood disorders. Although the neurobiological substrates of its action remain poorly documented, basic research has shown that omega-3 increases brain-derived neurotrophic factor (BDNF) levels in brain regions associated with depression, as antidepressant drugs do. In contrast, low BDNF levels and hippocampal atrophy were observed in animal models of depression. In this context, the present study compared the effects of long-lasting fish oil-enriched diet, an important source of omega-3 fatty acids, between heterozygous BDNF+/- mice and their wild-type littermates. Our results demonstrated lower activation of Erk in BDNF+/- mice whereas this deficit was rescued by fish oil-enriched diet. In parallel, BDNF+/- mice displayed elevated hippocampal extracellular 5-HT levels in relation with a local decreased serotonin transporter protein level. Fish oil-enriched diet restored normal serotonergic tone by increasing the protein levels of serotonin transporter. At the cellular level, fish oil-enriched diet increased the pool of immature neurons in the dentate gyrus of BDNF+/- mice and the latter observations coincide with its ability to promote anxiolytic- and antidepressant-like response in these mutants. Collectively, our results demonstrate that the beneficial effects of long-term exposure to fish oil-enriched diet in behavioral paradigms known to recapitulate diverse abnormalities related to the depressive state specifically in mice with a partial loss of BDNF. These findings contrast with the mechanism of action of currently available antidepressant drugs for which the full manifestation of their therapeutic activity depends on the enhancement of serotoninergic and BDNF signalling. Further studies are warranted to determine whether fish oil supplementation could be used as an add-on strategy to conventional pharmacological interventions in treatment-resistant patients and relevant animal models.

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  • N-3 supplementation dampens neuroinflammation and attenuates behavioral indices of mood deficits in rodents.

    “Several reports link higher n-3 consumption with lower prevalence and severity of mood disturbances in humans [45] and demonstrate that n-3 supplementation dampens neuroinflammation and attenuates behavioral indices of mood deficits in rodents [46,47].”

    From The menace of obesity to depression and anxiety prevalence (2022) · cites this paper as [46]

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Authors
Zemdegs, J., Rainer, Q., Grossmann, C. P., Rousseau-Ralliard, D., Grynberg, A., Ribeiro, E., & Guiard, B. P.
Affiliations
  • Université Paris-Sud (FR)
  • Centre National de la Recherche Scientifique (FR)
  • Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (FR)
  • Universidade Federal de São Paulo (BR)
Corresponding author
Guiard, Bruno P.
Venue
Frontiers in Neuroscience
Published
2018-12-21
Volume
12
Pages
974-974
ISSN
1662-453X (ISSN-L)
OpenAlex
W2904253189
Cited by
23
References
113
Citations by year
2026: 3 · 2025: 2 · 2023: 5 · 2022: 2 · 2021: 4 · 2020: 5 · 2019: 2
FWCI
2.27
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Neuroscience (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
Keywords
omega-3 fatty acids, brain-derived neurotrophic factor, BDNF knockout mice, antidepressant-like effects, anxiolytic-like effects, ERK activation, serotonin transporter, hippocampal serotonin, dentate gyrus neurogenesis, treatment-resistant depression

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