Duodenal-Jejunal Bypass Improves Insulin Resistance by Enhanced Glucagon-Like Peptide-1 Secretion Through Increase of Bile Acids.

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  • 1 June 2014
    • journal article
    • Vol. 61  (132) , 1049-54
    • PMID:26158164
Abstract
The aim of this study is to investigate the mechanisms of improvement in insulin resistance after duodenal-jejunal bypass (DIB), especially regarding the correlation between bile acids and glucagon-like peptide-1 (GLP-1). SD rats were divided into two groups: DIB or Sham group. Blood glucose, insulin, GLP-1, bile acids, and the number of L cells in the small intestine were investigated three weeks after the operations. Next, to assess the effect of the bile acids on GLP-1 secretion in ileum, bile diversion model (=inhibition of rapid bile exposure to the ileum; BD group) were performed and postoperative glycemic parameters were measured. DJB improved insulin resistance and increased GLP-1 compared with sham. Higher bile acids in DJB were found than that in sham. The number of L cells in the common limb of DJB was increased compared with that in the distal segment of sham. In BD group, insulin resistance had not improved. GLP-1, bile acids, and the number of L cells revealed no significant changes compared with sham. DJB has a potential to improve insulin resistance, which may be related to enhanced GLP-1 secretion through the increase of bile acids in the common limb of the small intestine.