Cited by 682Bariatric Surgery and OutcomesDiabetes Treatment and ManagementDiabetes, Cardiovascular Risks, and Lipoproteins

Effect of weight loss by gastric bypass surgery versus hypocaloric diet on glucose and incretin levels in patients with type 2 diabetes

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Laferrère, Blandine, Teixeira, Julio, McGinty, James, Tran, Hao, Egger, Joseph R., Colarusso, Antonia, Kovack, Betty, Bawa, Baani +4 more·2008·The Journal of Clinical Endocrinology & Metabolism

Abstract

CONTEXT: Gastric bypass surgery (GBP) results in rapid weight loss, improvement of type 2 diabetes (T2DM), and increase in incretins levels. Diet-induced weight loss also improves T2DM and may increase incretin levels. OBJECTIVE: Our objective was to determine whether the magnitude of the change of the incretin levels and effect is greater after GBP compared with a low caloric diet, after equivalent weight loss. DESIGN AND METHODS: Obese women with T2DM studied before and 1 month after GBP (n = 9), or after a diet-induced equivalent weight loss (n = 10), were included in the study. Patients from both groups were matched for age, body weight, body mass index, diabetes duration and control, and amount of weight loss. SETTING: This outpatient study was conducted at the General Clinical Research Center. MAIN OUTCOME MEASURES: Glucose, insulin, proinsulin, glucagon, gastric inhibitory peptide (GIP), and glucagon-like peptide (GLP)-1 levels were measured after 50-g oral glucose. The incretin effect was measured as the difference in insulin levels in response to oral and to an isoglycemic iv glucose load. RESULTS: At baseline, none of the outcome variables (fasting and stimulated values) were different between the GBP and diet groups. Total GLP-1 levels after oral glucose markedly increased six times (peak:17 +/- 6 to 112 +/- 54 pmol/liter; P < 0.001), and the incretin effect increased five times (9.4 +/- 27.5 to 44.8 +/- 12.7%; P < 0.001) after GBP, but not after diet. Postprandial glucose levels (P = 0.001) decreased more after GBP. CONCLUSIONS: These data suggest that early after GBP, the greater GLP-1 and GIP release and improvement of incretin effect are related not to weight loss but rather to the surgical procedure. This could be responsible for better diabetes outcome after GBP.

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  1. Laferrère B, Tran H, Egger J, Teixeira J, McGinty J, Yap K, Bawa B, Olivan B 2007 The increase in GLP-1 levels and incretin effect after Roux-en-Y gastric bypass surgery (RYGBP) persists up to 1 year in patients with type 2 diabetes mellitus (T2DM). Obesity 15:7 (Abstract OR-21) [Google Scholar]

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Authors
Laferrère, B., Teixeira, J., McGinty, J., Tran, H., Egger, J. R., Colarusso, A., Kovack, B., Bawa, B., Koshy, N., Lee, H., Yapp, K., & Olivan, B.
Affiliations
  • Obesity Research Center (B.L., H.T., J.R.E., A.C., B.K., B.B., K.Y., B.O.), St. Luke’s/Roosevelt Hospital Center, Columbia University College of Physicians and Surgeons, New York, New York 10025
  • Bariatric Division (J.T., J.M., N.K., H.L.), St. Luke’s/Roosevelt Hospital Center, Columbia University College of Physicians and Surgeons, New York, New York 10025
  • St. Luke's-Roosevelt Hospital Center (US)
Venue
The Journal of Clinical Endocrinology & Metabolism
Published
2008-07-01
Volume
93
Issue
7
Pages
2479-2485
ISSN
  • 0021-972X (ISSN-L)
  • 1945-7197
OpenAlex
W2146737709
Cited by
682
References
57
Citations by year
2026: 9 · 2025: 10 · 2024: 11 · 2023: 18 · 2022: 17 · 2021: 25 · 2020: 25 · 2019: 39 · 2018: 21 · 2017: 45 · 2016: 48 · 2015: 44 · 2014: 57 · 2013: 72 · 2012: 59
FWCI
63.22
Type
journal article
Language
en
Open access
Locations
  • The Journal of Clinical Endocrinology & Metabolism (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01 DK 67561, DK63068-05, DK 26687, R01DK067561, P30DK026687)
  • National Center for Research Resources (UL1RR024156)
Topics
  • Health Sciences › Medicine › Surgery › Bariatric Surgery and Outcomes
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
gastric bypass, type 2 diabetes, weight loss, incretin effect, glucagon-like peptide-1, glucose-dependent insulinotropic polypeptide, proinsulin, glucagon, insulin, postprandial blood glucose, hypocaloric diet, obesity, women
MeSH terms
Adult, Blood Glucose, Diabetes Mellitus, Type 2, Diet, Reducing, Female, Gastric Inhibitory Polypeptide, Glucagon, Humans, Male, Middle Aged, Obesity, Gastric Bypass, Weight Loss, Glucagon-Like Peptide 1, Incretins

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