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Université de Fribourg

Adaptive thermogenesis and uncoupling proteins: a reappraisal of their roles in fat metabolism and energy balance

Dulloo, Abdul G. ; Seydoux, Josiane ; Jacquet, Jean

In: Physiology & Behavior, 2004, vol. 83, no. 4, p. 587-602

After decades of controversies about the quantitative importance of autoregulatory adjustments in energy expenditure in weight regulation, there is now increasing recognition that even subtle variations in thermogenesis could, in dynamic systems and over the long term, be important in determining weight maintenance in some and obesity in others. The main challenge nowadays is to provide a...

Université de Fribourg

Regulation of fat storage via suppressed thermogenesis: a thrifty phenotype that predisposes individuals with catch-up growth to insulin resistance and obesity

Dulloo, Abdul G.

In: Hormone Research, 2006, vol. 65, no. 3, p. 90-97

Catch-up growth during infancy and childhood is increasingly recognized as a major risk factor for later development of insulin-related complications and chronic diseases, namely abdominal obesity, type 2 diabetes and cardiovascular disease. As catch-up growth per se is characterized by insulin resistance, hyperinsulinaemia and an accelerated rate of fat storage (i.e., catch-up fat) even in...

Université de Fribourg

Reliability of low‐power cycling efficiency in energy expenditure phenotyping of inactive men and women

Fares, Elie-Jacques ; Isacco, Laurie ; Monnard, Cathriona R. ; Miles-Chan, Jennifer L. ; Montani, Jean-Pierre ; Schutz, Yves ; Dulloo, Abdul G.

In: Physiological Reports, 2017, vol. 5, no. 9, p. e13233

Standardized approaches to assess human energy expenditure (EE) are well defined at rest and at moderate to high‐intensity exercise, but not at light intensity physical activities energetically comparable with those of daily life (i.e., 1.5–4 times the resting EE, i.e., 1.5–4 METs). Our aim was to validate a graded exercise test for assessing the energy cost of low‐intensity dynamic...

Université de Fribourg

Energy expenditure and substrate oxidation in response to side-alternating whole body vibration across three commonly-used vibration frequencies

Fares, Elie-Jacques ; Charrière, Nathalie ; Montani, Jean-Pierre ; Schutz, Yves ; Dulloo, Abdul G. ; Miles-Chan, Jennifer L.

In: PLOS ONE, 2016, vol. 11, no. 3, p. e0151552

There is increasing recognition about the importance of enhancing energy expenditure (EE) for weight control through increases in low-intensity physical activities comparable with daily life (1.5–4 METS). Whole-body vibration (WBV) increases EE modestly and could present both a useful adjuvant for obesity management and tool for metabolic phenotyping. However, it is unclear whether a...

Université de Fribourg

Lack of Food Anticipation in Per2 Mutant Mice

Feillet, Céline A. ; Ripperger, Jürgen A. ; Magnone, Maria Chiara ; Dulloo, Abdul G. ; Albrecht, Urs ; Challet, Etienne

In: Current Biology, 2006, vol. 16, no. 20, p. 2016-2022

Predicting time of food availability is key for survival in most animals. Under restricted feeding conditions, this prediction is manifested in anticipatory bouts of locomotor activity and body temperature. This process seems to be driven by a food-entrainable oscillator independent of the main, light-entrainable clock located in the suprachiasmatic nucleus (SCN) of the hypothalamus 1 and 2....

Université de Fribourg

Cardiovascular and metabolic responses to tap water ingestion in young humans: does the water temperature matter?

Girona, M. ; Grasser, Erik Konrad ; Dulloo, Abdul G. ; Montani, Jean-Pierre

In: Acta Physiologica, 2014, vol. 211, no. 2, p. 358–370

Aim: Drinking water induces short-term cardiovascular and metabolic changes. These effects are considered to be triggered by gastric distension and osmotic factors, but little is known about the influence of water temperature.Methods: We determined, in a randomized crossover study, the acute cardiovascular and metabolic responses to 500 mL of tap water at 3 °C (cold), 22 °C (room) and...

Université de Fribourg

Cardio- and cerebrovascular responses to the energy drink Red Bull in young adults: a randomized cross-over study

Grasser, Erik K. ; Yepuri, Gayathri ; Dulloo, Abdul G. ; Montani, Jean-Pierre

In: European Journal of Nutrition, 2014, p. 1–11

Purpose: Energy drinks are beverages containing vasoactive metabolites, usually a combination of caffeine, taurine, glucuronolactone and sugars. There are concerns about the safety of energy drinks with some countries banning their sales. We determined the acute effects of a popular energy drink, Red Bull, on cardiovascular and hemodynamic variables, cerebrovascular parameters and...