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Diabetes 55:S92-S97, 2006
DOI: 10.2337/db06-S012
© 2006 by the American Diabetes Association
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Section III: The Gastrointestinal Connection

Impact of Gastric Bypass Surgery on Gut Hormones and Glucose Homeostasis in Type 2 Diabetes

Erik Näslund1, and John G. Kral2

1 Division of Surgery, Karolinska Institutet Danderyd Hospital, Stockholm, Sweden
2 Department of Surgery, State University of New York, Downstate Medical Center, Brooklyn, New York

Address correspondence and reprint requests to Erik Näslund, MD, PhD, Division of Surgery, Karolinska Institutet, Danderyd Hospital, SE-182 88 Stockholm, Sweden. E-mail: erik.naslund{at}ki.se

Abbreviations: AGB, adjustable gastric banding; BPD, biliopancreatic diversion; GBP, gastric bypass; GLP-1, glucagon-like peptide 1; GI, gastrointestinal; GIP, glucose-dependent insulinotropic polypeptide; PYY, peptide YY; VBG, vertical banded gastroplasty

Gastric bypass surgery (GBP) for obesity, by constructing an isolated ~30-ml proximal gastric pouch connected to a 75-cm limb of proximal jejunum, bypassing >90% of the stomach, the pylorus, and the duodenum, cures type 2 diabetes in >80% of cases. We review alterations in gastrointestinal peptide release after GBP that affect glucose disposal. We focus on ghrelin and the incretins glucose-dependent insulinotropic polypeptide, glucagon-like peptide 1, and peptide YY as the most likely candidates for increasing insulin sensitivity after these operations, even before substantial weight loss has occurred. Although we have limited our review to only four gastrointestinal peptides, others may be involved, as are adipocyte-derived molecules such as leptin and adiponectin, and substrate receptor interactions in target tissues including the brain.


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Copyright © 2006 by the American Diabetes Association.