Role of orexin-A in the ventrolateral preoptic area on components of total energy expenditure

J. E. Coborn, D. P. Deporter, V. Mavanji, C. M. Sinton, C. M. Kotz, C. J. Billington, J. A. Teske

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Background:Identifying whether components of total energy expenditure (EE) are affected by orexin receptor (OXR1 and OXR2) stimulation or antagonism with dual orexin receptor antagonists (DORAs) has relevance for obesity treatment. Orexin receptor stimulation reduces weight gain by increasing total EE and EE during spontaneous physical activity (SPA).Objective:The purpose of this study was to determine if a DORA (TCS-1102) in the ventrolateral preoptic area (VLPO) reduced orexin-A-induced arousal, SPA, total EE and EE during sleep, rest, wake and SPA and whether the DORA alone reduced total EE and its components. We hypothesized that: (1) a DORA would reduce orexin-A induced increases in arousal, SPA, components of total EE, reductions in sleep and the EE during sleep and (2) the DORA alone would reduce baseline (non-stimulated) SPA and total EE.Subjects/Methods:Sleep, wakefulness, SPA and EE were determined after microinjection of the DORA (TCS-1102) and orexin-A in the VLPO of male Sprague-Dawley rats with a unilateral cannula targeted towards the VLPO. Individual components of total EE were determined based on time-stamped data.Results:The DORA reduced orexin-A-induced increases in arousal, SPA, total EE and EE during SPA, wake, rest and sleep 1 h post injection (P<0.05). Orexin-A significantly reduced sleep and significantly increased EE during sleep 1 h post injection (P<0.05). Furthermore, the DORA alone significantly reduced total EE, EE during sleep (NREM and REM) and resting EE 2 h post injection (P<0.05).Conclusions:These data suggest that orexin-A reduces weight gain by stimulating total EE through increases in EE during SPA, rest and sleep. Residual effects of the DORA alone include decreases in total EE and EE during sleep and rest, which may promote weight gain.

Original languageEnglish (US)
Pages (from-to)1256-1262
Number of pages7
JournalInternational Journal of Obesity
Volume41
Issue number8
DOIs
StatePublished - Aug 1 2017

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Preoptic Area
Energy Metabolism
Sleep
Orexins
Arousal
Orexin Receptors
Weight Gain
Injections
Orexin Receptor Antagonists

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Endocrinology, Diabetes and Metabolism
  • Nutrition and Dietetics

Cite this

Coborn, J. E., Deporter, D. P., Mavanji, V., Sinton, C. M., Kotz, C. M., Billington, C. J., & Teske, J. A. (2017). Role of orexin-A in the ventrolateral preoptic area on components of total energy expenditure. International Journal of Obesity, 41(8), 1256-1262. https://doi.org/10.1038/ijo.2017.92

Role of orexin-A in the ventrolateral preoptic area on components of total energy expenditure. / Coborn, J. E.; Deporter, D. P.; Mavanji, V.; Sinton, C. M.; Kotz, C. M.; Billington, C. J.; Teske, J. A.

In: International Journal of Obesity, Vol. 41, No. 8, 01.08.2017, p. 1256-1262.

Research output: Contribution to journalArticle

Coborn, JE, Deporter, DP, Mavanji, V, Sinton, CM, Kotz, CM, Billington, CJ & Teske, JA 2017, 'Role of orexin-A in the ventrolateral preoptic area on components of total energy expenditure', International Journal of Obesity, vol. 41, no. 8, pp. 1256-1262. https://doi.org/10.1038/ijo.2017.92
Coborn JE, Deporter DP, Mavanji V, Sinton CM, Kotz CM, Billington CJ et al. Role of orexin-A in the ventrolateral preoptic area on components of total energy expenditure. International Journal of Obesity. 2017 Aug 1;41(8):1256-1262. https://doi.org/10.1038/ijo.2017.92
Coborn, J. E. ; Deporter, D. P. ; Mavanji, V. ; Sinton, C. M. ; Kotz, C. M. ; Billington, C. J. ; Teske, J. A. / Role of orexin-A in the ventrolateral preoptic area on components of total energy expenditure. In: International Journal of Obesity. 2017 ; Vol. 41, No. 8. pp. 1256-1262.
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AU - Coborn, J. E.

AU - Deporter, D. P.

AU - Mavanji, V.

AU - Sinton, C. M.

AU - Kotz, C. M.

AU - Billington, C. J.

AU - Teske, J. A.

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