Cited by 11Neurotransmitter Receptor Influence on BehaviorRegulation of Appetite and ObesityOlfactory and Sensory Function Studies

Physiological state tunes mesolimbic signaling: lessons from sodium appetite and inspiration from Randall R. Sakai

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Fortin, Samantha M., Roitman, Mitchell F.·2017·Physiology & Behavior

Abstract

Sodium deficit poses a life-threatening challenge to body fluid homeostasis and generates a sodium appetite - the behavioral drive to ingest sodium. Dr. Randall R. Sakai greatly contributed to our understanding of the hormonal responses to negative sodium balance and to the central processing of these signals. Reactivity to the taste of sodium solutions and the motivation to seek and consume sodium changes dramatically with body fluid balance. Here, we review studies that collectively suggest that sodium deficit recruits the mesolimbic system to play a role in the behavioral expression of sodium appetite. The recruitment of the mesolimbic system likely contributes to intense sodium seeking and reinforces sodium consumption observed in deficient animals. Some of the hormones that are released in response to sodium deficit act directly on both dopamine and nucleus accumbens elements. Moreover, the taste of sodium in sodium deficient rats evokes a pattern of dopamine and nucleus accumbens activity that is similar to responses to rewarding stimuli. A very different pattern of activity is observed in non-deficient rats. Given the well-characterized endocrine response to sodium deficit and its central action, sodium appetite becomes an ideal model for understanding the role of mesolimbic signaling in reward, reinforcement and the generation of motivated behavior.

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Crossref · 10.1016/j.physbeh.2016.11.021

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  • Sodium depletion causes a robust and highly specific motivation to consume sodium, such that salt solutions that are negative/aversive in the replete state become preferred/rewarding in sodium-depleted animals.

    “Sodium depletion causes a robust and highly specific motivation to consume sodium, such that salt solutions that are negative/aversive in the replete state become preferred/rewarding in sodium-depleted animals”

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Authors
Fortin, S. M., & Roitman, M. F.
Affiliations
University of Illinois Chicago (US)
Corresponding author
Roitman, Mitchell F.
Venue
Physiology & Behavior
Publisher
Elsevier BV
Published
2017-09
Volume
178
Pages
21-27
ISSN
0031-9384 (ISSN-L)
OpenAlex
W2550322372
Cited by
11
References
105
Citations by year
2026: 1 · 2023: 1 · 2020: 4 · 2019: 1 · 2018: 4
FWCI
0.18
Type
journal article
Language
en
Open access
Locations
  • Physiology & Behavior (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute on Drug Abuse (R01DA025634)
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 › Sensory Systems › Olfactory and Sensory Function Studies
Keywords
sodium appetite, sodium deficiency, mesolimbic system, fluid homeostasis, dopamine, nucleus accumbens, sodium taste, reward, reinforcement, motivated behavior
MeSH terms
Animals, Appetite, Humans, Limbic System, Sodium, Dietary, Water-Electrolyte Balance

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