Cited by 319Adipokines, Inflammation, and Metabolic DiseasesAdipose Tissue and MetabolismDiabetes Treatment and Management

The DOI matches its Crossref record; 48 of the 48 references it cites were found in a registry or an index.

Glucagon-like peptide-1 inhibits adipose tissue macrophage infiltration and inflammation in an obese mouse model of diabetes

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Abstract

Aims/hypothesis Obesity and insulin resistance are associated with low-grade chronic inflammation. Glucagon-like peptide-1 (GLP-1) is known to reduce insulin resistance. We investigated whether GLP-1 has anti-inflammatory effects on adipose tissue, including adipocytes and adipose tissue macrophages (ATM).Methods We administered a recombinant adenovirus (rAd) producing GLP-1 (rAd-GLP-1) to an ob/ob mouse model of diabetes. We examined insulin sensitivity, body fat mass, the infiltration of ATM and metabolic profiles. We analysed the mRNA expression of inflammatory cytokines, lipogenic genes, and M1 and M2 macrophage-specific genes in adipose tissue by real-time quantitative PCR. We also examined the activation of nuclear factor κB (NF-κB), extracellular signal-regulated kinase 1/2 and Jun N-terminal kinase (JNK) in vivo and in vitro.Results Fat mass, adipocyte size and mRNA expression of lipogenic genes were significantly reduced in adipose tissue of rAd-GLP-1-treated ob/ob mice. Macrophage populations (F4/80(+) and F4/80(+)CD11b(+)CD11c(+) cells), as well as the expression and production of IL-6, TNF-α and monocyte chemoattractant protein-1, were significantly reduced in adipose tissue of rAd-GLP-1-treated ob/ob mice. Expression of M1-specific mRNAs was significantly reduced, but that of M2-specific mRNAs was unchanged in rAd-GLP-1-treated ob/ob mice. NF-κB and JNK activation was significantly reduced in adipose tissue of rAd-GLP-1-treated ob/ob mice. Lipopolysaccharide-induced inflammation was reduced by the GLP-1 receptor agonist, exendin-4, in 3T3-L1 adipocytes and ATM.Conclusions/interpretation We suggest that GLP-1 reduces macrophage infiltration and directly inhibits inflammatory pathways in adipocytes and ATM, possibly contributing to the improvement of insulin sensitivity.

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Authors
Lee, Y.-S., Park, M.-S., Choung, J.-S., Kim, S.-S., Oh, H.-H., Choi, C.-S., Ha, S.-Y., Kang, Y., Kim, Y., & Jun, H.-S.
Affiliations
  • Gachon University (KR)
  • Gachon University Gil Medical Center (KR)
  • Ajou University (KR)
  • Seoul National University (KR)
Corresponding author
Jun, H.-S.
Venue
Diabetologia
Published
2012-06-22
Volume
55
Issue
9
Pages
2456-2468
ISSN
  • 0012-186X (ISSN-L)
  • 1432-0428
OpenAlex
W1993624198
Cited by
319
References
47
Citations by year
2026: 31 · 2025: 34 · 2024: 35 · 2023: 29 · 2022: 25 · 2021: 24 · 2020: 17 · 2019: 26 · 2018: 17 · 2017: 15 · 2016: 17 · 2015: 17 · 2014: 18 · 2013: 12 · 2012: 2
FWCI
11.69
Type
journal article
Language
en
Open access
Locations
  • Diabetologia (publishedVersion)
  • PubMed (publishedVersion)
  • AJOU Open Repository (Ajou University) (submittedVersion)
Funders
  • National Research Foundation
  • National Research Foundation of Korea (A062260)
  • Korea Science and Engineering Foundation
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Physiology (medical) › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
Keywords
glucagon-like peptide-1, adipose tissue macrophages, adipose tissue inflammation, obesity, type 2 diabetes, insulin resistance, ob/ob mice, adipocyte size, lipogenic gene expression, macrophage polarization, NF-κB, JNK, exendin-4, lipopolysaccharide-induced inflammation, adipocyte inflammation, adipose tissue mass
MeSH terms
Glucagon-Like Peptide-1 Receptor, Adipose Tissue, Animals, Anti-Inflammatory Agents, Gene Expression Regulation, Inflammation, Insulin Resistance, Macrophages, Mice, Obese, Obesity, NF-kappa B, Receptors, Glucagon, Body Fat Distribution, Mice, Glucagon-Like Peptide 1, Real-Time Polymerase Chain Reaction

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