Cited by 197Diabetes Treatment and ManagementPancreatic function and diabetesDiabetes Management and Research

GIP Does Not Potentiate the Antidiabetic Effects of GLP-1 in Hyperglycemic Patients With Type 2 Diabetes

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Mentis, Nikolaos, Vardarli, Irfan, Köthe, Lars D., Holst, Jens J., Deacon, Carolyn F., Theodorakis, Michael, Meier, Juris J., Nauck, Michael A.·2011·Diabetes

Abstract

OBJECTIVE: The incretin glucagon-like peptide 1 (GLP-1) exerts insulinotropic activity in type 2 diabetic patients, whereas glucose-dependent insulinotropic polypeptide (GIP) no longer does. We studied whether GIP can alter the insulinotropic or glucagonostatic activity of GLP-1 in type 2 diabetic patients. RESEARCH DESIGN AND METHODS: Twelve patients with type 2 diabetes (nine men and three women; 61 ± 10 years; BMI 30.0 ± 3.7 kg/m2; HbA1c 7.3 ± 1.5%) were studied. In randomized order, intravenous infusions of GLP-1(7-36)-amide (1.2 pmol · kg−1 · min−1), GIP (4 pmol · kg−1 · min−1), GLP-1 plus GIP, and placebo were administered over 360 min after an overnight fast (≥1 day wash-out period between experiments). Capillary blood glucose, plasma insulin, C-peptide, glucagon, GIP, GLP-1, and free fatty acids (FFA) were determined. RESULTS: Exogenous GLP-1 alone reduced glycemia from 10.3 to 5.1 ± 0.2 mmol/L. Insulin secretion was stimulated (insulin, C-peptide, P < 0.0001), and glucagon was suppressed (P = 0.009). With GIP alone, glucose was lowered slightly (P = 0.0021); insulin and C-peptide were stimulated to a lesser degree than with GLP-1 (P < 0.001). Adding GIP to GLP-1 did not further enhance the insulinotropic activity of GLP-1 (insulin, P = 0.90; C-peptide, P = 0.85). Rather, the suppression of glucagon elicited by GLP-1 was antagonized by the addition of GIP (P = 0.008). FFA were suppressed by GLP-1 (P < 0.0001) and hardly affected by GIP (P = 0.07). CONCLUSIONS: GIP is unable to further amplify the insulinotropic and glucose-lowering effects of GLP-1 in type 2 diabetes. Rather, the suppression of glucagon by GLP-1 is antagonized by GIP.

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  • GLP-1 has therapeutic potential for reducing elevated plasma glucose and body weight, while GIP is unable to stimulate insulin secretion or lower plasma glucose effectively in T2D.

    “Among the two incretin hormones, glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1), the latter has been established as having therapeutic potential for reducing elevated plasma glucose (1, 2) and body weight (3), while the former has been unable to either stimulate insulin secretion (1) or lower plasma glucose effectively in type 2 diabetes (T2D) (4).”

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  1. [47]Chia CW Carlson OD Kim W Exogenous glucose–dependent insulinotropic polypeptide worsens postprandial hyperglycemia in type 2 diabetes. Diabetes 2009; 58: 1342– 1349 19276444 PMC2682676

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Authors
Mentis, N., Vardarli, I., Köthe, L. D., Holst, J. J., Deacon, C. F., Theodorakis, M., Meier, J. J., & Nauck, M. A.
Affiliations
  • Diabeteszentrum Bad Lauterberg (DE)
  • University of Copenhagen (DK)
  • National and Kapodistrian University of Athens (GR)
  • St. Josef-Hospital (DE)
Corresponding author
Nauck, Michael A.
Venue
Diabetes
Published
2011-03-22
Volume
60
Issue
4
Pages
1270-1276
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2110914062
Cited by
197
References
58
Citations by year
2026: 11 · 2025: 14 · 2024: 19 · 2023: 16 · 2022: 16 · 2021: 22 · 2020: 13 · 2019: 11 · 2018: 8 · 2017: 8 · 2016: 16 · 2015: 11 · 2014: 8 · 2013: 11 · 2012: 8
FWCI
8.40
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (publishedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
Keywords
glucose-dependent insulinotropic polypeptide, glucagon-like peptide-1, type 2 diabetes, hyperglycemia, insulin secretion, glucagon suppression, free fatty acids, C-peptide, glucose-lowering effect, incretin-based therapy, insulinotropic effect
MeSH terms
Adult, Aged, Diabetes Mellitus, Type 2, Drug Interactions, Female, Gastric Inhibitory Polypeptide, Humans, Hyperglycemia, Hypoglycemic Agents, Male, Middle Aged, Glucagon-Like Peptide 1, Incretins

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