Cited by 678Adipose Tissue and MetabolismPhysiological and biochemical adaptationsRegulation of Appetite and Obesity

Nonshivering thermogenesis and its adequate measurement in metabolic studies

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Cannon, Barbara, Nedergaard, Jan·2011·Journal of Experimental Biology

Abstract

Alterations in nonshivering thermogenesis are presently discussed as being both potentially causative of and able to counteract obesity. However, the necessity for mammals to defend their body temperature means that the ambient temperature profoundly affects the outcome and interpretation of metabolic experiments. An adequate understanding and assessment of nonshivering thermogenesis is therefore paramount for metabolic studies. Classical nonshivering thermogenesis is facultative, i.e. it is only activated when an animal acutely requires extra heat (switched on in minutes), and adaptive, i.e. it takes weeks for an increase in capacity to develop. Nonshivering thermogenesis is fully due to brown adipose tissue activity; adaptation corresponds to the recruitment of this tissue. Diet-induced thermogenesis is probably also facultative and adaptive and due to brown adipose tissue activity. Although all mammals respond to injected/infused norepinephrine (noradrenaline) with an increase in metabolism, in non-adapted mammals this increase mainly represents the response of organs not involved in nonshivering thermogenesis; only the increase after adaptation represents nonshivering thermogenesis. Thermogenesis (metabolism) should be expressed per animal, and not per body mass [not even to any power (0.75 or 0.66)]. A 'cold tolerance test' does not examine nonshivering thermogenesis capacity; rather it tests shivering capacity and endurance. For mice, normal animal house temperatures are markedly below thermoneutrality, and the mice therefore have a metabolic rate and food consumption about 1.5 times higher than their intrinsic requirements. Housing and examining mice at normal house temperatures carries a high risk of identifying false positives for intrinsic metabolic changes; in particular, mutations/treatments that affect the animal's insulation (fur, skin) may lead to such problems. Correspondingly, true alterations in intrinsic metabolic rate remain undetected when metabolism is examined at temperatures below thermoneutrality. Thus, experiments with animals kept and examined at thermoneutrality are likely to yield an improved possibility of identifying agents and genes important for human energy balance.

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Crossref · 10.1242/jeb.050989

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  • Animal models have shown that GLP-1 can increase energy expenditure and regulate heat production and conversion from white adipose tissue to brown adipose tissue in obese mice, although human data on this effect are not yet convincing.

    “Animal models have shown that GLP-1 can increase energy expenditure and regulate heat production and conversion from white adipose tissue to brown adipose tissue in obese mice [42], although human data on this effect are not yet convincing [18,43].”

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Authors
Cannon, B., & Nedergaard, J.
Affiliations
Stockholm University (SE)
Corresponding author
Cannon, Barbara
Venue
Journal of Experimental Biology
Published
2011-01-15
Volume
214
Issue
2
Pages
242-253
ISSN
  • 0022-0949 (ISSN-L)
  • 1477-9145
OpenAlex
W2148400263
Cited by
677
References
99
Citations by year
2026: 20 · 2025: 31 · 2024: 32 · 2023: 45 · 2022: 42 · 2021: 55 · 2020: 53 · 2019: 42 · 2018: 69 · 2017: 48 · 2016: 47 · 2015: 42 · 2014: 48 · 2013: 48 · 2012: 41
FWCI
3.31
Type
journal article
Language
en
Open access
Licence
other-oa
Locations
  • Journal of Experimental Biology (publishedVersion, other-oa)
  • PubMed (publishedVersion)
  • RVC Research Online (Royal Veterinary College) (submittedVersion, cc-by)
Funders
Vetenskapsrådet
Topics
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Physical Sciences › Environmental Science › Ecology › Physiological and biochemical adaptations
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
non-shivering thermogenesis, brown adipose tissue, thermoneutrality, ambient temperature, metabolic rate measurement, norepinephrine, shivering, diet-induced thermogenesis, obesity, energy balance, mice, fur insulation
MeSH terms
Acclimatization, Animals, Adipose Tissue, Brown, Cold Temperature, Humans, Norepinephrine, Thermogenesis

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