Cited by 119Olfactory and Sensory Function StudiesRegulation of Appetite and ObesitySleep and Wakefulness Research

Changes in rat olfactory detection performance induced by orexin and leptin mimicking fasting and satiation

JULLIARD, A, CHAPUT, M, APELBAUM, A, AIME, P, MAHFOUZ, M, DUCHAMPVIRET, P·2007·Behavioural Brain Research

Abstract

Numerous peripheral and hypothalamic peptides control food intake. Among these signals are orexin, an orexigenic molecule released into the olfactory bulb by centrifugal hypothalamic fibres and leptin, an anorexigenic molecule that is released peripherally and can pass through the blood-brain barrier. In the present study, we injected either orexin or leptin, intracerebroventricularly, and their effect on olfactory performance was evaluated in two groups of rats, using a behavioral paradigm based on conditioned olfactory aversion. Rats were made aversive to water odorized with isoamyl acetate (ISO) at 10(-5) (1microl in 100ml of water). One group was injected with orexin versus saline and the other with leptin versus saline. They were then presented with different concentrations (lower than 10(-5)) of ISO-odorized water to compare their ability to avoid the ISO-drink. Orexin decreased ISO-drink consumption, showing increased avoidance of the ISO concentrations tested which ranged from 10(-9) to 10(-7). Conversely, the administration of leptin resulted in a dose dependant increase in the odorized-drink consumption for ISO 10(-10). Orexin therefore increases and leptin decreases olfactory sensitivity. Orexin and leptin modulate the olfactory performance in a similar way as do physiological induced fasting and satiation and appear to be important factors in the interdependency of olfaction and food intake.

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Crossref · 10.1016/j.bbr.2007.05.033

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  • In rodents, absence of leptin increases and addition of leptin dampens peripheral taste and olfactory sensitivity.

    “In rodents, absence of leptin has been shown to increase and addition of leptin to dampen peripheral taste and olfactory sensitivity”

    From Food reward, hyperphagia, and obesity (2011) · cites this paper as [90]

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Authors
JULLIARD, A., CHAPUT, M., APELBAUM, A., AIME, P., MAHFOUZ, M., & DUCHAMPVIRET, P.
Affiliations
  • Lyon 1 Université (FR)
  • Université de Lyon (FR)
Venue
Behavioural Brain Research
Publisher
Elsevier BV
Published
2007-11-02
Volume
183
Issue
2
Pages
123-129
ISSN
0166-4328 (ISSN-L)
OpenAlex
W2130303084
Cited by
119
References
68
Citations by year
2026: 4 · 2025: 3 · 2024: 5 · 2023: 3 · 2022: 6 · 2021: 7 · 2020: 5 · 2019: 8 · 2018: 5 · 2017: 8 · 2016: 5 · 2015: 7 · 2014: 9 · 2013: 4 · 2012: 11
FWCI
3.25
Type
journal article
Language
en
Open access
closed
Locations
  • Behavioural Brain Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Agence Nationale de la Recherche
  • Université de Lyon
Topics
  • Life Sciences › Neuroscience › Sensory Systems › Olfactory and Sensory Function Studies
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
Keywords
orexin, leptin, isoamyl acetate, food intake regulation, fasting, satiation, olfactory bulb, hypothalamic neuropeptides, blood-brain barrier
MeSH terms
Orexins, Analysis of Variance, Animals, Avoidance Learning, Behavior, Animal, Dose-Response Relationship, Drug, Fasting, Feeding Behavior, Injections, Intraventricular, Male, Neuropeptides, Satiation, Smell, Rats, Wistar, Signal Detection, Psychological, Neurotransmitter Agents, Leptin, Intracellular Signaling Peptides and Proteins, Rats

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