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Université de Fribourg

Functional body composition and related aspects in research on obesity and cachexia: report on the 12th Stock Conference held on 6 and 7 September 2013 in Hamburg, Germany

Müller, M. J. ; Baracos, V. ; Bosy-Westphal, A. ; Dulloo, Abdul G. ; Eckel, J. ; Fearon, K. C. H. ; Hall, K. D. ; Pietrobelli, A. ; Sørensen, T. I. A. ; Speakman, J. ; Trayhurn, P. ; Visser, M. ; Heymsfield, S. B.

In: Obesity Reviews, 2014, vol. 15, no. 8, p. 640–656

The 12th Stock Conference addressed body composition and related functions in two extreme situations, obesity and cancer cachexia. The concept of ‘functional body composition’ integrates body components into regulatory systems relating the mass of organs and tissues to corresponding in vivo functions and metabolic processes. This concept adds to an understanding of organ/tissue mass and...

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 microvascular...

Université de Fribourg

Sitting comfortably versus lying down: Is there really a difference in energy expenditure?

Miles-Chan, Jennifer Lynn ; Sarafian, Delphine ; Montani, Jean-Pierre ; Schutz, Yves ; Dulloo, Abdul G.

In: Clinical Nutrition, 2014, vol. 33, no. 1, p. 175–178

Background and aims: Energy expenditure (EE) during sitting is widely assumed to be higher than that while lying down, but supporting evidence is equivocal. Despite this, resting EE in the sitting position is often used as a proxy for basal metabolic rate. Here we investigate whether EE differs in the comfortable seated position compared to supine (lying) position.Methods: EE and respiratory...

Université de Fribourg

Energy gap in the aetiology of body weight gain and obesity: a challenging concept with a complex evaluation and pitfalls

Schutz, Yves ; Byrne, N. M. ; Dulloo, Abdul G. ; Hills, A. P.

In: Obesity Facts, 2014, vol. 7, no. 1, p. 15–25

The concept of energy gap(s) is useful for understanding the consequence of a small daily, weekly, or monthly positive energy balance and the inconspicuous shift in weight gain ultimately leading to overweight and obesity. Energy gap is a dynamic concept: an initial positive energy gap incurred via an increase in energy intake (or a decrease in physical activity) is not constant, may fade out...

Université de Fribourg

Translational issues in targeting brown adipose tissue thermogenesis for human obesity management

Dulloo, Abdul G.

In: Annals of the New York Academy of Sciences, 2013, vol. 1302, no. 1, p. 1–10

The recent advancements in unraveling novel mechanisms that control the induction, (trans)differentiation, proliferation, and thermogenic activity and capacity of brown adipose tissue (BAT), together with the application of imaging techniques for human BAT visualization, have generated optimism that these advances will provide novel strategies for targeting BAT thermogenesis, leading to...

Université de Fribourg

Heterogeneity in the energy cost of posture maintenance during standing relative to sitting: phenotyping according to magnitude and time-Course

Miles-Chan, Jennifer L. ; Sarafian, Delphine ; Montani, Jean-Pierre ; Schutz, Yves ; Dulloo, Abdul G.

In: PLoS ONE, 2013, vol. 8, no. 5, p. e65827

Background: Reducing sitting-time may decrease risk of disease and increase life-span. In the search for approaches to reduce sitting-time, research often compares sitting to standing and ambulation, but the energetic cost of standing alone versus sitting is equivocal, with large variation in reported mean values (0% to > 20% increase in energy expenditure (EE) during standing).Objective: To...

Université de Fribourg

A role for adipose tissue de novo lipogenesis in glucose homeostasis during catch-up growth : a randle cycle favoring fat storage

Marcelino, Helena ; Veyrat-Durebex, Christelle ; Summermatter, Serge ; Sarafian, Delphine ; Miles-Chan, Jennifer ; Arsenijevic, Denis ; Zani, Fabio ; Montani, Jean-Pierre ; Seydoux, Josiane ; Solinas, Giovanni ; Rohner-Jeanrenaud, Françoise ; Dulloo, Abdul G.

In: Diabetes, 2013, vol. 62, no. 2, p. 362-372

Catch-up growth, a risk factor for type 2 diabetes, is characterized by hyperinsulinemia and accelerated body fat recovery. Using a rat model of semistarvation-refeeding that exhibits catch-up fat, we previously reported that during refeeding on a low-fat diet, glucose tolerance is normal but insulin-dependent glucose utilization is decreased in skeletal muscle and increased in adipose tissue,...