Erratum to: Exercise increases lactoferrin, but decreases lysozyme in salivary granulocytes

Gillum, Trevor; Kuennen, Matthew R.; McKenna, Zachary; Castillo, Micaela; Jordan-Patterson, Alex; Bohnert, Caitlin

doi:10.1007/s00421-017-3650-9

Cited by 1 publication

(5 citation statements)

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“…When measured by gas exchange, the term DIT should be abandoned and consideration be given to the following as alternatives: diet-induced energy production or diet-induced energenesis. The time has come for a renaissance of direct calorimetry to provide an accurate measure of thermogenesis (Kenny et al 2017). Assumed DIT derived from gas exchange lurks as a fake friend and foe of energy balance.…”

Section: Resultsmentioning

confidence: 99%

“…The measurement of heat energy plays a pivotal role in the study of energy homeostasis. The generation of heat is a sine qua non of the energy metabolism of substrates and proportional to energy expenditure and, therefore, metabolic rate (Kenny et al 2017).…”

Section: Methods For Measuring Energy Productionmentioning

confidence: 99%

“…Direct calorimetry estimates energy expenditure by measuring heat dissipation from the body (Kenny et al 2017). Because the amount lost equals the amount that is produced at steady state, direct calorimetry is a measurement of heat production (Ferrannini 1988, Kenny et al 2017. Its usefulness is dependent on purpose, circumstance and context.…”

Section: Direct Calorimetrymentioning

confidence: 99%

“…Although muscular contractions of exercise increases heat production, the energy required for physical work itself is derived from chemical energy (through the use of ATP), which is not measured by direct calorimetry. Thus, metabolic heat production represents the amount of energy dissipated as heat, which is not directed to performing external work (Kenny et al 2017). To be effective, a calorimeter must be a closed system to ensure that all of the heat produced from metabolism is measured, and no transfer of energy occurs between the calorimeter and its surroundings (Webb et al 1988).…”

Section: Direct Calorimetrymentioning

confidence: 99%

“…Several studies both in humans and rodents have compared energy measurements between direct and indirect calorimetry (Kaiyala & Schwartz 2011, Kenny et al 2017. It is unsurprising that discrepancies occur because the methods measure different things under different experimental condition using methodologies that differ in accuracy and precision (Kaiyala & Schwartz 2011).…”

Section: Comparison Of Indirect and Direct Calorimetrymentioning

confidence: 99%

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Diet-induced thermogenesis: fake friend or foe?

2018

Journal of Endocrinology

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Diet-induced thermogenesis (DIT) is energy dissipated as heat after a meal, contributing 5-15% to total daily energy expenditure (EE). There has been a long interest in the intriguing possibility that a defect in DIT predisposes to obesity. However, the evidence is conflicting; DIT is usually quantified by indirect calorimetry, which does not measure heat. Using gas exchange, indirect calorimetry measures total post-prandial EE, which comprises heat energy produced from brown adipose tissue (BAT) and energy required for processing and storing nutrients. We questioned whether DIT is reliably quantified by indirect calorimetry by employing infrared thermography to independently assess thermogenesis. Thermogenic activity of BAT was stimulated by cold and by a meal that induced a parallel increase in energy production. These stimulatory effects on BAT thermogenesis were inhibited by glucocorticoids. However, glucocorticoids enhanced postprandial EE in the face of reduced BAT thermogenesis and stimulated lipid synthesis. The increase in EE correlated significantly with the increase in lipogenesis. As energy cannot be destroyed (first law of thermodynamics), the energy that would have been dissipated as heat after a meal is channeled into storage. Post-prandial EE is the sum of heat energy that is lost (true DIT) and chemical energy that is stored. Indirect calorimetry does not reliably quantify DIT. When estimated by indirect calorimetry, assumed DIT can be a friend or foe of energy balance. That gas exchange-derived DIT reflects solely energy dissipation as heat is a false assumption likely to explain the conflicting results on the role of DIT in obesity.

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Section: Resultsmentioning

confidence: 99%

Section: Methods For Measuring Energy Productionmentioning

confidence: 99%