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 L. ; 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...

Université de Fribourg

PI3Kγ within a nonhematopoietic cell type negatively regulates diet-induced thermogenesis and promotes obesity and insulin resistance

Becattini, Barbara ; Marone, Romina ; Zani, Fabio ; Arsenijevic, Denis ; Seydoux, Josiane ; Montani, Jean-Pierre ; Dulloo, Abdul G. ; Thorens, Bernard ; Preitner, Frédéric ; Wymann, Matthias P. ; Solinas, Giovanni

In: Proceedings of the National Academy of Sciences of the United States of America, 2011, vol. 108, no. 42, p. E854-E863

Obesity is associated with a chronic low-grade inflammation, and specific antiinflammatory interventions may be beneficial for the treatment of type 2 diabetes and other obesity-related diseases. The lipid kinase PI3Kγ is a central proinflammatory signal transducer that plays a major role in leukocyte chemotaxis, mast cell degranulation, and endothelial cell activation. It was also reported that...

Université de Fribourg

Dietary modulation of body composition and insulin sensitivity during catch-up growth in rats: effects of oils rich in n-6 or n-3 PUFA

Yepuri, Gayathri ; Marcelino, Helena ; Shahkhalili, Yasaman ; Aprikian, Olivier ; Macé, Katherine ; Seydoux, Josiane ; Miles-Chan, Jennifer L. ; Montani, Jean-Pierre ; Dulloo, Abdul G.

In: British Journal of Nutrition, 2011, vol. 105, no. 12, p. 1750-1763

The present study investigates whether excessive fat accumulation and hyperinsulinaemia during catch-up growth on high-fat diets are altered by n-6 and n-3 PUFA derived from oils rich in either linoleic acid (LA), α-linolenic acid (ALA), arachidonic acid (AA) or DHA. It has been shown that, compared with food-restricted rats refed a high-fat (lard) diet low in PUFA, those...

Université de Fribourg

Adipose tissue plasticity during catch-up fat driven by thrifty metabolism: relevance for muscle-adipose glucose redistribution during catch-up growth

Summermatter, Serge ; Marcelino, Helena ; Arsenijevic, Denis ; Buchala, Antony J. ; Aprikian, Olivier ; Assimacopoulos-Jeannet, Françoise ; Seydoux, Josiane ; Montani, Jean-Pierre ; Solinas, Giovanni ; Dulloo, Abdul G.

In: Diabetes, 2009, vol. 58, no. 10, p. 2228-2237

OBJECTIVE: Catch-up growth, a risk factor for later type 2 diabetes, is characterized by hyperinsulinemia, accelerated body-fat recovery (catch-up fat), and enhanced glucose utilization in adipose tissue. Our objective was to characterize the determinants of enhanced glucose utilization in adipose tissue during catch-up fat. RESEARCH DESIGN AND METHODS: White adipose tissue morphometry, lipogenic...

Université de Fribourg

Thrifty metabolism that favors fat storage after caloric restriction: a role for skeletal muscle phosphatidylinositol-3-kinase activity and AMP-activated protein kinase

Summermatter, Serge ; Mainieri, Davide ; Russell, A. P. ; Seydoux, Josiane ; Montani, Jean-Pierre ; Buchala, Anthony J. ; Solinas, Giovanni ; Dulloo, Abdul G.

In: Faseb Journal, 2008, vol. 22, p. 774-785

Energy conservation directed at accelerating body fat recovery (or catch-up fat) contributes to obesity relapse after slimming and to excess fat gain during catch-up growth after malnutrition. To investigate the mechanisms underlying such thrifty metabolism for catch-up fat, we tested whether during refeeding after caloric restriction rats exhibiting catch-up fat driven by suppressed...

Université de Fribourg

β-Adrenergic control of stearoyl-CoA desaturase 1 repression in relation to sympathoadrenal regulation of thermogenesis

Mainieri, Davide ; Montani, Jean-Pierre ; Seydoux, Josiane ; Giacobino, J. P. ; Boss, O. ; Dulloo, Abdul G.

In: International Journal of Obesity, 2007, vol. 31, no. 2, p. 378–381

Mice lacking β-adrenoceptors, which mediate the thermogenic effects of norepinephrine and epinephrine, show diminished thermogenesis and high susceptibility to obesity, whereas mice lacking stearoyl-CoA desaturase 1 (SCD1), which catalyzes the synthesis of monounsaturated fatty acids, show enhanced thermogenesis and high resistance to obesity. In testing whether β-adrenergic...