Cited by 259Adipose Tissue and MetabolismRegulation of Appetite and ObesityAdipokines, Inflammation, and Metabolic Diseases

Orexin Is Required for Brown Adipose Tissue Development, Differentiation, and Function

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Sellayah, Dyan, Bharaj, Preeti, Sikder, Devanjan·2011·Cell Metabolism

Abstract

Orexin (OX) neuropeptides stimulate feeding and arousal. Deficiency of orexin is implicated in narcolepsy, a disease associated with obesity, paradoxically in the face of reduced food intake. Here, we show that obesity in orexin-null mice is associated with impaired brown adipose tissue (BAT) thermogenesis. Failure of thermogenesis in OX-null mice is due to inability of brown preadipocytes to differentiate. The differentiation defect in OX-null neonates is circumvented by OX injections to OX-null dams. In vitro, OX, triggers the full differentiation program in mesenchymal progenitor stem cells, embryonic fibroblasts and brown preadipocytes via p38 mitogen activated protein (MAP) kinase and bone morphogenetic protein receptor-1a (BMPR1A)-dependent Smad1/5 signaling. Our study suggests that obesity associated with OX depletion is linked to brown-fat hypoactivity, which leads to dampening of energy expenditure. Thus, orexin plays an integral role in adaptive thermogenesis and body weight regulation via effects on BAT differentiation and function.

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Crossref · 10.1016/j.cmet.2011.08.010

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Authors
Sellayah, D., Bharaj, P., & Sikder, D.
Affiliations
Sanford Burnham Prebys Medical Discovery Institute (US)
Corresponding author
Sikder, Devanjan
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2011-10
Volume
14
Issue
4
Pages
478-490
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2026363549
Cited by
259
References
76
Citations by year
2026: 6 · 2025: 7 · 2024: 6 · 2023: 9 · 2022: 13 · 2021: 16 · 2020: 16 · 2019: 14 · 2018: 17 · 2017: 19 · 2016: 22 · 2015: 21 · 2014: 29 · 2013: 35 · 2012: 25
FWCI
20.30
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Funders
University of Texas Southwestern Medical Center
Topics
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
orexin, brown adipose tissue, thermogenesis, obesity, energy expenditure, p38 MAPK, BMPR1A, Smad1/5 signaling, body weight regulation, narcolepsy
MeSH terms
Orexins, Animals, Adipose Tissue, Brown, Cell Differentiation, Cell Line, Energy Metabolism, Mice, Inbred C57BL, Neuropeptides, Obesity, Signal Transduction, Mice, Knockout, Thermogenesis, RNA Interference, RNA, Small Interfering, Intracellular Signaling Peptides and Proteins, p38 Mitogen-Activated Protein Kinases, Mice, Smad1 Protein, Smad5 Protein, Bone Morphogenetic Protein Receptors, Type I

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