Effects of duodenal switch alone or in combination with sleeve gastrectomy on body weight and lipid metabolism in rats

O A Gudbrandsen; Y Kodama; S A Mjøs; C-M Zhao; H Johannessen; H-R Brattbakk; C Haugen; B Kulseng; G Mellgren; D Chen

doi:10.1038/nutd.2014.22

Effects of duodenal switch alone or in combination with sleeve gastrectomy on body weight and lipid metabolism in rats

Nutr Diabetes. 2014 Jun 30;4(6):e124. doi: 10.1038/nutd.2014.22.

Authors

O A Gudbrandsen¹, Y Kodama², S A Mjøs³, C-M Zhao², H Johannessen², H-R Brattbakk⁴, C Haugen⁵, B Kulseng⁶, G Mellgren⁵, D Chen⁶

Affiliations

¹ 1] Department of Clinical Medicine, University of Bergen, Bergen, Norway [2] Department of Clinical Science, University of Bergen, Bergen, Norway.
² Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
³ 1] Department of Chemistry, University of Bergen, Bergen, Norway [2] Nofima BioLab, Fyllingsdalen, Norway.
⁴ Department of Clinical Science, University of Bergen, Bergen, Norway.
⁵ 1] Department of Clinical Science, University of Bergen, Bergen, Norway [2] Hormone Laboratory, Haukeland University Hospital, Bergen, Norway [3] KG Jebsen Center for Diabetes Research, University of Bergen, Bergen, Norway.
⁶ 1] Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway [2] Department of Surgery, St Olav's University Hospital, Trondheim, Norway.

Abstract

Background: A combined procedure of sleeve gastrectomy and duodenal switch (SG+DS) has been applied to the treatment of super obesity. The aim of the present study was to test whether duodenal switch alone (DS) leads to similar weight loss and changes in lipid metabolism as SG+DS.

Methods: Male Sprague-Dawley rats underwent sham surgery (Sham, N=7), duodenal switch alone (DS, N=5) or sleeve gastrectomy followed by duodenal switch (SG+DS, N=5). Body weight, feed and water intakes, and ambulatory activity were recorded 2 months post surgery. Tissue and faecal lipids, faecal bile acids, plasma cytokines and lipid metabolism-related gene expression in adipose tissue and liver were analysed.

Results: Daily energy intake, relative feed uptake, ambulatory activity and body weight reduction were similar between DS and SG+DS rats. The hepatic triacylglycerol content was higher and faecal secretion of triacylglycerol was lower after SG+DS compared to DS (P<0.05). Faecal bile acid secretion was higher in SG+DS than in DS rats (P<0.05) despite similar hepatic CYP7A1mRNA level. Plasma levels of proinflammatory cytokines interleukin (IL)-1b, IL-2, IL-4, IL-5, IL-6, IL-12, granulocyte-macrophage colony stimulating factor and tumour necrosis factor alpha were higher in SG+DS than in DS rats (P<0.05).

Conclusions: Although DS and SG+DS had similar efficacy in terms of body weight loss, SG+DS resulted in a poorer regulation of lipid metabolism than DS.