Cited by 424Neurotransmitter Receptor Influence on BehaviorRegulation of Appetite and ObesityTryptophan and brain disorders

Diet-induced obesity promotes depressive-like behaviour that is associated with neural adaptations in brain reward circuitry

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Sharma, S, Fulton, S·2013·International Journal of Obesity

Abstract

Background The biological mechanisms that link the development of depression to metabolic disorders such as obesity and diabetes remain obscure. Dopamine- and plasticity-related signalling in mesolimbic reward circuitry is implicated in the pathophysiology and aetiology of depression.Objective To determine the impact of a palatable high-fat diet (HFD) on depressive-like behaviour and biochemical alterations in brain reward circuitry in order to understand the neural processes that may contribute to the development of depression in the context of diet-induced obesity (DIO).Methods Adult male C57Bl6 mice were placed on a HFD or ingredient-matched, low-fat diet for 12 weeks. At the end of the diet regimen, we assessed anxiety and depressive-like behaviour, corticosterone levels and biochemical changes in the midbrain and limbic brain regions. Nucleus accumbens (NAc), dorsolateral striatum (DLS) and ventral tegmental area dissections were subjected to SDS-PAGE and immunoblotting using antibodies against D1A receptor, D2 receptor, brain-derived neurotrophic factor (BDNF), phospho-DARPP-32(thr75), phospho-CREB and ΔFosB.Results HFD mice showed significant decreases in open arm time and centre time activity in elevated plus maze and open field tasks, respectively, and increased immobility (behavioural despair) in the forced swim test. Corticosterone levels following acute restraint stress were substantially elevated in HFD mice. HFD mice had significantly higher D2R, BDNF and ΔFosB, but reduced D1R, protein expression in the NAc. Notably, the expression of BDNF in both the NAc and DLS and phospho-CREB in the DLS was positively correlated with behavioural despair.Conclusions Our results demonstrate that chronic consumption of high-fat food and obesity induce plasticity-related changes in reward circuitry that are associated with a depressive-like phenotype. As increases in striatal BDNF and CREB activity are well implicated in depressive behaviour and reward, we suggest these signalling molecules may mediate the effects of high-fat feeding and DIO to promote negative emotional states and depressive-like symptomology.

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  • Prolonged high-fat diet elicits metabolic dysfunction and increases anxiety- and depressive-like behaviors in rodents.

    “To this end, rodent research has revealed that prolonged high-fat diet (HFD) elicits metabolic dysfunction and increases anxiety-and depressive-like behaviors [28][29][30][31][32][33][34][35][36], heightens stress and hypothalamic-pituitary-adrenal (HPA) responses [37,38], and triggers neurobehavioral deficits associated with blunted mesolimbic dopamine function [39][40][41].”

    From The menace of obesity to depression and anxiety prevalence (2022) · cites this paper as [28]

  • BDNF affects the regulation of feeding and energy metabolism.

    “BDNF is known to affect the regulation of feeding and energy metabolism [218–221].”

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  1. Dong C, Sanchez LE, Price RA. Relationship of obesity to depression: a family- based study. Int J Obes Relat Metab Disord 2004; 28: 790 --795.
  2. Russo SJ, Bolanos CA, Theobald DE, DeCarolis NA, Renthal W, Kumar A et al. IRS2-Akt pathway in midbrain dopamine neurons regulates behavioral and cellular responses to opiates. Nat Neurosci 2007; 10: 93--99.
  3. Nestler EJ, Kelz MB, Chen J. [Delta]FosB: a molecular mediator of long-term neural and behavioral plasticity. Brain Res 1999; 835: 10 --17.
  4. Teegarden SL, Nestler EJ, Bale TL. Delta]FosB-mediated alterations in dopamine signaling are normalized by a palatable high-fat diet. Biol Psychiatry 2008; 64: 941 --950.
  5. Maniam J, Morris MJ. Palatable cafeteria diet ameliorates anxiety and depression- like symptoms following an adverse early environment. Psychoneuroendocrinology 2010; 35: 717 --728.

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Authors
Sharma, S., & Fulton, S.
Affiliations
Université de Montréal (CA)
Corresponding author
Fulton, S
Venue
International Journal of Obesity
Published
2012-04-17
Volume
37
Issue
3
Pages
382-389
ISSN
  • 0307-0565 (ISSN-L)
  • 1476-5497
OpenAlex
W2004415631
Cited by
424
References
59
Citations by year
2026: 24 · 2025: 18 · 2024: 38 · 2023: 25 · 2022: 34 · 2021: 36 · 2020: 37 · 2019: 33 · 2018: 32 · 2017: 31 · 2016: 42 · 2015: 27 · 2014: 26 · 2013: 18 · 2012: 3
FWCI
9.75
Type
journal article
Language
en
Open access
Locations
  • International Journal of Obesity (publishedVersion)
  • PubMed (publishedVersion)
Funders
Canadian Diabetes Association
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
Keywords
diet-induced obesity, high-fat diet, depression-like behavior, reward systems, mesolimbic dopamine system, nucleus accumbens, dorsolateral striatum, ventral tegmental area, brain-derived neurotrophic factor, CREB, ΔFosB, dopamine D1 receptor, dopamine D2 receptor, corticosterone, anxiety, depression, metabolic disorders
MeSH terms
Animals, Anxiety, Behavior, Animal, Corticosterone, Depression, Disease Models, Animal, Hippocampus, Male, Mice, Inbred C57BL, Motor Activity, Neuronal Plasticity, Obesity, Promoter Regions, Genetic, Reward, Stress, Psychological, Swimming, Receptors, Dopamine D2, Mice, Diet, High-Fat

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