Neuropeptidergic mediators of spontaneous physical activity and non-exercise activity thermogenesis

Jennifer A Teske, C. J. Billington, C. M. Kotz

Research output: Contribution to journalArticle

57 Scopus citations

Abstract

Lean individuals have high levels of spontaneous physical activity (SPA) and the energy expenditure derived from that activity, termed non-exercise activity thermogenesis or NEAT, appears to protect them from obesity. Conversely, obesity in different human populations is characterized by low levels of SPA and NEAT. Like in humans, elevated SPA in rats appears to protect against obesity: obesity-resistant rats have significantly greater SPA and NEAT than obesity-prone rats. We review the literature on brain mechanisms important in mediating SPA and NEAT. The focus is on neuropeptides, including cholecystokinin, corticotropin-releasing hormone (also known as corticotropin-releasing factor), neuromedin U, neuropeptide Y, leptin, agouti-related protein, orexin-A (also known as hypocretin-1), and ghrelin. We also review information regarding interactions between these neuropeptides and dopamine, a neurotransmitter important in mediating motor function. Finally, we present evidence that elevated signaling of pathways mediating SPA and NEAT may protect against weight gain and obesity.

Original languageEnglish (US)
Pages (from-to)71-90
Number of pages20
JournalNeuroendocrinology
Volume87
Issue number2
DOIs
Publication statusPublished - Dec 2007
Externally publishedYes

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Keywords

  • Energy expenditure
  • Locomotor activity
  • Obesity resistance
  • Physical activity

ASJC Scopus subject areas

  • Endocrinology
  • Neuroscience(all)

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