Journal article

A role for skeletal muscle stearoyl-CoA desaturase 1 in control of thermogenesis

  • Mainieri, Davide Physiology, Department of Medicine, Faculty of Science, University of Fribourg, Switzerland
  • Summermatter, Serge Physiology, Department of Medicine, Faculty of Science, University of Fribourg, Switzerland
  • Seydoux, Josiane Physiology, Department of Medicine, Faculty of Science, University of Fribourg, Switzerland
  • Montani, Jean-Pierre Physiology, Department of Medicine, Faculty of Science, University of Fribourg, Switzerland
  • Rusconi, Sandro Biochemistry, Department of Medicine, Faculty of Science, University of Fribourg, Switzerland
  • Russell, Aaron P. Clinique de réadaptation, SUVA Care, Sion, Switzerland
  • Boss, Olivier Endocrinology of Energy Metabolism, Boston, Massachusetts, USA
  • Buchala, Antony J. Department of Biology, Faculty of Science, University of Fribourg, Switzerland
  • Dulloo, Abdul G. Physiology, Department of Medicine, Faculty of Science, University of Fribourg, Switzerland
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    2006
Published in:
  • The FASEB Journal. - 2006, vol. 20, no. 10, p. 1751-1753
English An enhanced metabolic efficiency for accelerating the recovery of fat mass (or catch-up fat) is a characteristic feature of body weight regulation after weight loss or growth retardation and is the outcome of an "adipose-specific" suppression of thermogenesis, i.e., a feedback control system in which signals from the depleted adipose tissue fat stores exert a suppressive effect on thermogenesis. Using a previously described rat model of semistarvation-refeeding in which catch-up fat results from suppressed thermogenesis per se, we report here that the gene expression of stearoyl-coenzyme A desaturase 1 (SCD1) is elevated in skeletal muscle after 2 wk of semistarvation and remains elevated in parallel to the phase of suppressed thermogenesis favoring catch-up fat during refeeding. These elevations in the SCD1 transcript are skeletal muscle specific and are associated with elevations in microsomal Δ9 desaturase enzyme activity, in the Δ9 desaturation index, and in the relative content of SCD1-derived monounsaturates in several lipid fractions extracted from skeletal muscle. An elevated skeletal muscle SCD1, by desaturating the products of de novo lipogenesis and diverting them away from mitochondrial oxidation, would inhibit substrate cycling between de novo lipogenesis and lipid oxidation, thereby leading to a state of suppressed thermogenesis that regulates the body’s fat stores.
Faculty
Faculté des sciences et de médecine
Department
Département de Médecine, Département de Biologie
Language
  • English
Classification
Medicine
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/300262
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