Cited by 63Adipose Tissue and MetabolismAdipokines, Inflammation, and Metabolic DiseasesPancreatic function and diabetes

Functional expression of glucose-dependent insulinotropic polypeptide receptors is coupled to differentiation in a human adipocyte model

Weaver, R E, Donnelly, D, Wabitsch, M, Grant, P J, Balmforth, A J·2008·International Journal of Obesity

Abstract

Objective To establish that human adipocytes express functional glucose-dependent insulinotropic peptide (GIP) receptors and in particular the regulation of GIP receptor (GIPR) expression in the context of the dynamic process of adipocyte differentiation. Design A combination of semiquantitative real-time PCR and measurement of GIP-stimulated cAMP accumulation was used to establish the expression and functional coupling of GIPRs during in vitro differentiation of human Simpson-Golabi-Behmel syndrome (SGBS) preadipocytes. Results Semiquantitative real-time PCR revealed that GIPR expression was substantially increased by day 4 of differentiation, reaching a maximum around 6-8 days (approximately 200-fold increase above undifferentiated cells, n=2). We also analysed the expression of the adipocyte fatty acid binding protein (FABP4) to relate GIPR expression to a molecular differentiation marker of adipogenesis. FABP4 expression was barely detectable in undifferentiated cells. However, following exposure to adipogenic medium, FABP4 expression gradually increased, with a maximal expression level around 10 days (approximately 1,600,000-fold increase above undifferentiated cells, n=2). Thus, the increases in GIPR mRNA during adipogenesis occur earlier than FABP4, suggesting that it might represent a gene expressed early in terminal differentiation and thus plays a role in fat droplet formation. A unit of 1 microM GIP failed to raise intracellular cAMP levels above basal levels in un…

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Crossref · 10.1038/ijo.2008.148

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Authors
Weaver, R. E., Donnelly, D., Wabitsch, M., Grant, P. J., & Balmforth, A. J.
Affiliations
  • University of Leeds (GB)
  • Universität Ulm (DE)
Corresponding author
Balmforth, A J
Venue
International Journal of Obesity
Published
2008-09-09
Volume
32
Issue
11
Pages
1705-1711
ISSN
  • 0307-0565 (ISSN-L)
  • 1476-5497
OpenAlex
W1983641973
Cited by
63
References
39
Citations by year
2026: 3 · 2025: 7 · 2024: 5 · 2023: 3 · 2022: 8 · 2021: 3 · 2020: 3 · 2019: 4 · 2018: 1 · 2016: 3 · 2015: 2 · 2014: 1 · 2013: 1 · 2012: 5
FWCI
3.17
Type
journal article
Language
en
Open access
closed
Locations
  • International Journal of Obesity (publishedVersion)
  • PubMed (publishedVersion)
Funders
Biotechnology and Biological Sciences Research Council
Topics
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
Keywords
glucose-dependent insulinotropic polypeptide, GIP receptor, adipogenesis, FABP4, cAMP accumulation, fat deposition
MeSH terms
Cell Differentiation, Cell Line, Cells, Cultured, Gastric Inhibitory Polypeptide, Humans, Receptors, Gastrointestinal Hormone, RNA, Messenger, Gene Expression, Adipocytes, Insulin-Secreting Cells

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