Cited by 228Sleep and Wakefulness ResearchAdipose Tissue and MetabolismRegulation of Appetite and Obesity

An orexinergic projection from perifornical hypothalamus to raphe pallidus increases rat brown adipose tissue thermogenesis

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Tupone, Domenico, Madden, Christopher J., Cano, Georgina, Morrison, Shaun F.·2011·The Journal of Neuroscience

Abstract

Orexin (hypocretin) neurons, located exclusively in the PeF-LH, which includes the perifornical area (PeF), the lateral hypothalamus (LH), and lateral portions of the medial hypothalamus, have widespread projections and influence many physiological functions, including the autonomic regulation of body temperature and energy metabolism. Narcolepsy is characterized by the loss of orexin neurons and by disrupted sleep, but also by dysregulation of body temperature and by a strong tendency for obesity. Heat production (thermogenesis) in brown adipose tissue (BAT) contributes to the maintenance of body temperature and, through energy consumption, to body weight regulation. We identified a neural substrate for the influence of orexin neurons on BAT thermogenesis in rat. Nanoinjection of orexin-A (12 pmol) into the rostral raphe pallidus (rRPa), the site of BAT sympathetic premotor neurons, produced large, sustained increases in BAT sympathetic outflow and in BAT thermogenesis. Activation of neurons in the PeF-LH also enhanced BAT thermogenesis over a long time course. Combining viral retrograde tracing from BAT, or cholera toxin subunit b tracing from rRPa, with orexin immunohistochemistry revealed synaptic connections to BAT from orexin neurons in PeF-LH and from rRPa neurons with closely apposed, varicose orexin fibers, as well as a direct, orexinergic projection from PeF-LH to rRPa. These results indicate a potent modulation of BAT thermogenesis by orexin released from the terminals of orexin neurons in PeF-LH directly into the rRPa and provide a potential mechanism contributing to the disrupted regulation of body temperature and energy metabolism in the absence of orexin.

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Crossref · 10.1523/jneurosci.3909-11.2011

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  1. Card JP Enquist LW Adolph KW The use of neurotropic herpesviruses for defining synaptically linked populations of neurons in the central nervous system. Methods in Molecular Genetics, Molecular Biology Techniques Part A 1994 363 382 Academic Press San Diego

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Authors
Tupone, D., Madden, C. J., Cano, G., & Morrison, S. F.
Affiliations
  • Oregon Health & Science University (US)
  • University of Pittsburgh (US)
Corresponding author
Tupone, Domenico
Venue
The Journal of Neuroscience
Published
2011-11-02
Volume
31
Issue
44
Pages
15944-15955
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2154434397
Cited by
228
References
92
Citations by year
2026: 2 · 2025: 6 · 2024: 7 · 2023: 7 · 2022: 7 · 2021: 19 · 2020: 15 · 2019: 19 · 2018: 24 · 2017: 14 · 2016: 17 · 2015: 18 · 2014: 26 · 2013: 26 · 2012: 20
FWCI
11.84
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) (submittedVersion)
Funders
  • National Science Foundation (0918867)
  • American Heart Association
  • National Institutes of Health (P40OD010996)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R56DK082558, DK-082558)
  • National Institute of Neurological Disorders and Stroke (NS040987, R01NS040987)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
orexin, perifornical hypothalamus, lateral hypothalamus, raphe pallidus, brown adipose tissue, thermogenesis, sympathetic outflow, thermoregulation, energy metabolism, narcolepsy, obesity, synaptic connectivity
MeSH terms
Orexins, Animals, Benzoxazoles, beta-Galactosidase, Body Temperature, Adipose Tissue, Brown, Cholera Toxin, Dose-Response Relationship, Drug, Globus Pallidus, Hypothalamus, Male, Microinjections, Naphthyridines, Neurons, Neuropeptides, Polystyrenes, Raphe Nuclei, Urea, N-Methylaspartate, Rats, Sprague-Dawley, Rats, Wistar, Gene Transfer Techniques, Neurotransmitter Agents, Excitatory Amino Acid Agonists, Thermogenesis, Intracellular Signaling Peptides and Proteins, Rats

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