Cited by 376Bariatric Surgery and OutcomesDiabetes Treatment and ManagementGut microbiota and health

Mechanisms of diabetes improvement following bariatric/metabolic surgery

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Batterham, Rachel L., Cummings, David E.·2016·Diabetes Care

Abstract

More than 20 years ago, Pories et al. published a seminal article, "Who Would Have Thought It? An Operation Proves to Be the Most Effective Therapy for Adult-Onset Diabetes Mellitus." This was based on their observation that bariatric surgery rapidly normalized blood glucose levels in obese people with type 2 diabetes mellitus (T2DM), and 10 years later, almost 90% remained diabetes free. Pories et al. suggested that caloric restriction played a key role and that the relative contributions of proximal intestinal nutrient exclusion, rapid distal gut nutrient delivery, and the role of gut hormones required further investigation. These findings of T2DM improvement/remission after bariatric surgery have been widely replicated, together with the observation that bariatric surgery prevents or delays incident T2DM. Over the ensuing two decades, important glucoregulatory roles of the gastrointestinal (GI) tract have been firmly established. However, the physiological and molecular mechanisms underlying the beneficial glycemic effects of bariatric surgery remain incompletely understood. In addition to the mechanisms proposed by Pories et al., changes in bile acid metabolism, GI tract nutrient sensing and glucose utilization, incretins, possible anti-incretin(s), and the intestinal microbiome are implicated. These changes, acting through peripheral and/or central pathways, lead to reduced hepatic glucose production, increased tissue glucose uptake, improved insulin sensitivity, and enhanced β-cell function. A constellation of factors, rather than a single overarching mechanism, likely mediate postoperative glycemic improvement, with the contributing factors varying according to the surgical procedure. Thus, different bariatric/metabolic procedures provide us with experimental tools to probe GI tract physiology. Embracing this approach through the application of detailed phenotyping, genomics, metabolomics, and gut microbiome studies will enhance our understanding of metabolic regulation and help identify novel therapeutic targets.

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  • Acute caloric restriction and the immediate dramatic increase in GLP-1 after surgery largely contribute to the improvement in glycemia seen within days.

    “the acute caloric restriction and the immediate dramatic increase in the levels of the gut peptide glucagon-like peptide (GLP)-1 after surgery largely contribute to the immense improvement in glycemia seen within days of the procedure [39, 47]”
  • Modifications in gut hormones, neural signaling, appetite suppression, and weight loss result in improved glucose homeostasis and amelioration or resolution of diabetes.

    “Modifications in the gut hormones coupled with appropriate alterations in neural signaling and appetite suppression, and the associated impressive weight loss following bariatric procedures result in improved glucose homeostasis and amelioration or complete resolution of diabetes [47].”

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Research works printed but not linked: 4

  1. Evensen OK. Alimentary hypoglycemia after stomach operations and influence of gastric emptying on glucose tolerance curve. Acta Med Scand 1942;110:143-153
  2. Steven S, Hollingsworth KG, Small PK, et al. Weight loss decreases excess pancreatic triacyl- glycerol specifically in type 2 diabetes. Diabetes Care 2016;39:158-165
  3. Patti ME, Li P, Goldfine AB. Insulin response to oral stimuli and glucose effectiveness in- creased in neuroglycopenia following gas- tric bypass. Obesity (Silver Spring) 2015;23: 798-807
  4. Service GJ, Thompson GB, Service FJ, Andrews JC, Collazo-Clavell ML, Lloyd RV. Hy- perinsulinemic hypoglycemia with nesidioblas- tosis after gastric-bypass surgery. N Engl J Med 2005;353:249-254

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Authors
Batterham, R. L., & Cummings, D. E.
Affiliations
  • University College Hospital (GB)
  • University of Washington (US)
Corresponding author
Batterham, Rachel L.
Venue
Diabetes Care
Published
2016-05-13
Volume
39
Issue
6
Pages
893-901
ISSN
  • 0149-5992 (ISSN-L)
  • 1935-5548
OpenAlex
W2399832243
Cited by
376
References
65
Citations by year
2026: 22 · 2025: 24 · 2024: 24 · 2023: 33 · 2022: 23 · 2021: 54 · 2020: 51 · 2019: 54 · 2018: 38 · 2017: 41 · 2016: 10 · 2014: 1
FWCI
52.77
Type
journal article
Language
en
Open access
Locations
  • Diabetes Care (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Rosetrees Trust
  • Stoneygate Trust
  • National Institute of Diabetes and Digestive and Kidney Diseases (RO1-DK-103842, RO1-DK-084324, RO1-DK-089528, U34-DK-107917)
Topics
  • Health Sciences › Medicine › Surgery › Bariatric Surgery and Outcomes
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
Keywords
bariatric surgery, metabolic surgery, type 2 diabetes, diabetes remission, glucose homeostasis, gastrointestinal hormones, incretins, bile acid metabolism, gut microbiota, insulin sensitivity, beta-cell function, hepatic glucose production, caloric restriction, obesity
MeSH terms
Blood Glucose, Diabetes Mellitus, Type 2, Energy Metabolism, Gastrointestinal Hormones, Glucose, Humans, Insulin Resistance, Obesity, Remission Induction, Signal Transduction, Weight Loss, Caloric Restriction, Gastrointestinal Tract, Bariatric Surgery, Incretins

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