Cited by 1,311Neurotransmitter Receptor Influence on BehaviorSleep and Wakefulness ResearchRegulation of Appetite and Obesity

A role for lateral hypothalamic orexin neurons in reward seeking

Harris, Glenda C., Wimmer, Mathieu, Aston-Jones, Gary·2005·Nature

Abstract

The lateral hypothalamus is a brain region historically implicated in reward and motivation, but the identity of the neurotransmitters involved are unknown. The orexins (or hypocretins) are neuropeptides recently identified as neurotransmitters in lateral hypothalamus neurons. Although knockout and transgenic overexpression studies have implicated orexin neurons in arousal and sleep, these cells also project to reward-associated brain regions, including the nucleus accumbens and ventral tegmental area. This indicates a possible role for these neurons in reward function and motivation, consistent with previous studies implicating these neurons in feeding. Here we show that activation of lateral hypothalamus orexin neurons is strongly linked to preferences for cues associated with drug and food reward. In addition, we show that chemical activation of lateral hypothalamus orexin neurons reinstates an extinguished drug-seeking behaviour. This reinstatement effect was completely blocked by prior administration of an orexin A antagonist. Moreover, administration of the orexin A peptide directly into the ventral tegmental area also reinstated drug-seeking. These data reveal a new role for lateral hypothalamus orexin neurons in reward-seeking, drug relapse and addiction.

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Crossref · 10.1038/nature04071

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  • The nucleus accumbens shell is part of a neural loop including the lateral hypothalamus and the ventral tegmental area, with orexin neurons playing a key role.

    “The nucleus accumbens shell is thereby part of a neural loop including the lateral hypothalamus and the ventral tegmental area, with orexin neurons playing a key role ([7](#B7), [22](#B22), [77](#B77), [98](#B98), [115](#B115), [125](#B125), [175](#B175), [199](#B199)).”

    From Food reward, hyperphagia, and obesity (2011) · cites this paper as [77]

  • Lateral hypothalamic neurons expressing orexin and other transmitters such as neurotensin provide modulatory input to midbrain dopamine neurons.

    “Recent investigations show that lateral hypothalamic neurons expressing orexin ([77](#B77), [199](#B199)) and other transmitters such as neurotensin ([101](#B101), [107](#B107)) provide modulatory input to midbrain dopamine neurons”

    From Food reward, hyperphagia, and obesity (2011) · cites this paper as [77]

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Authors
Harris, G. C., Wimmer, M., & Aston-Jones, G.
Affiliations
University of Pennsylvania (US)
Corresponding author
Harris, Glenda C.
Venue
Nature
Published
2005-08-14
Volume
437
Issue
7058
Pages
556-559
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1966793802
Cited by
1,311
References
32
Citations by year
2026: 20 · 2025: 41 · 2024: 48 · 2023: 45 · 2022: 61 · 2021: 52 · 2020: 54 · 2019: 47 · 2018: 80 · 2017: 60 · 2016: 76 · 2015: 69 · 2014: 76 · 2013: 84 · 2012: 85
FWCI
21.22
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • Rutgers University Community Repository (Rutgers University) (submittedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
National Institutes of Health
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
orexin, lateral hypothalamus, drug-seeking behavior, food seeking, drug relapse, reinstatement, ventral tegmental area, reward, motivation, drug addiction, overeating, nucleus accumbens
MeSH terms
Orexins, Animals, Cues, Hypothalamus, Injections, Intraventricular, Male, Morphine, Neurons, Neuropeptides, Reward, Proto-Oncogene Proteins c-fos, Rats, Sprague-Dawley, Substance-Related Disorders, Intracellular Signaling Peptides and Proteins, Rats

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