Cited by 59Adipokines, Inflammation, and Metabolic DiseasesMetabolism, Diabetes, and CancerAdipose Tissue and Metabolism

Gastric inhibitory peptide controls adipose insulin sensitivity via activation of cAMP-response element-binding protein and p110β isoform of phosphatidylinositol 3-kinase

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Mohammad, Sameer, Ramos, Lavoisier S., Buck, Jochen, Levin, Lonny R., Rubino, Francesco, McGraw, Timothy E.·2011·Journal of Biological Chemistry

Abstract

Gastric inhibitory peptide (GIP) is an incretin hormone secreted in response to food intake. The best known function of GIP is to enhance glucose-dependent insulin secretion from pancreatic β-cells. Extra-pancreatic effects of GIP primarily occur in adipose tissues. Here, we demonstrate that GIP increases insulin-dependent translocation of the Glut4 glucose transporter to the plasma membrane and exclusion of FoxO1 transcription factor from the nucleus in adipocytes, establishing that GIP has a general effect on insulin action in adipocytes. Stimulation of adipocytes with GIP alone has no effect on these processes. Using pharmacologic and molecular genetic approaches, we show that the effect of GIP on adipocyte insulin sensitivity requires activation of both the cAMP/protein kinase A/CREB signaling module and p110β phosphoinositol-3' kinase, establishing a novel signal transduction pathway modulating insulin action in adipocytes. This insulin-sensitizing effect is specific for GIP because isoproterenol, which elevates adipocyte cAMP and activates PKA/CREB signaling, does not affect adipocyte insulin sensitivity. The insulin-sensitizing activity points to a more central role for GIP in intestinal regulation of peripheral tissue metabolism, an emerging feature of inter-organ communication in the control of metabolism.

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Crossref · 10.1074/jbc.m111.289009

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  • Postprandial insulin excursions drive glucose disposal through actions in muscle and adipose tissue, and GIP enhances insulin sensitivity and glucose disposal in adipose tissue.

    “Postprandial excursions of insulin drive glucose dis­ posal through actions in muscle and adipose tissue, along with effects of postprandial excursions in GIP, to enhance insulin sensitivity and augment glucose disposal in adipose tissue (2-5).”

    From Effects of Tirzepatide vs Semaglutide on β-Cell Function, Insulin Sensitivity, and Glucose Control During a Meal Test (2024) · cites this paper as [3]

    The ‘GIP Potentiates Insulin Action in Adipocytes’ section reports that GIP increased insulin-stimulated glucose uptake in adipocytes, supporting the adipose-tissue part of the claim. The Discussion connects this effect to nutrient disposal after meals. Our copy does not establish the claim about postprandial insulin driving glucose disposal through muscle, and the paper’s own experiments used adipocytes rather than postprandial measurements. (LLM, conf=0.84)

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Research works printed but not linked: 14

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Authors
Mohammad, S., Ramos, L. S., Buck, J., Levin, L. R., Rubino, F., & McGraw, T. E.
Affiliations
Cornell University (US)
Corresponding author
McGraw, Timothy E.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2011-12
Volume
286
Issue
50
Pages
43062-43070
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2032914675
Cited by
59
References
7
Citations by year
2026: 3 · 2025: 5 · 2024: 5 · 2023: 5 · 2022: 6 · 2021: 3 · 2020: 3 · 2019: 5 · 2018: 3 · 2017: 4 · 2016: 2 · 2015: 3 · 2014: 6 · 2013: 2 · 2012: 4
FWCI
2.89
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (R01DK096925, R01DK069982, R01DK052852, DK52852, R56DK069982, R56DK096925, DK 69982)
Topics
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
Keywords
glucose-dependent insulinotropic polypeptide, incretins, CREB, CREB signaling, GLUT4 translocation, protein kinase A, isoproterenol, inter-organ communication, adipose tissue
MeSH terms
Cyclic AMP, Adipose Tissue, Animals, Electrophoresis, Polyacrylamide Gel, Gastric Inhibitory Polypeptide, Insulin Resistance, Receptor, Insulin, Immunoblotting, Cyclic AMP Response Element-Binding Protein, Adipocytes, 3T3-L1 Cells, Immunoprecipitation, Mice, Class Ia Phosphatidylinositol 3-Kinase

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