Cited by 41Adipose Tissue and MetabolismAdipokines, Inflammation, and Metabolic DiseasesTGF-β signaling in diseases

Bone morphogenetic protein 2 is a depot-specific regulator of human adipogenesis

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Denton, Nathan F., Eghleilib, Mohamed, Al-Sharifi, Sama, Todorčević, Marijana, Neville, Matt J., Loh, Nellie, Drakesmith, Alexander, Karpe, Fredrik +1 more·2019·International Journal of Obesity

Abstract

BACKGROUND: Bone morphogenetic proteins (BMPs) regulate adipogenesis but it is not clear whether they influence regional adipose tissue (AT) development in humans. OBJECTIVE: To characterise BMP2 expression, BMP2-SMAD1/5/8 signalling, and BMP2's potential effect on proliferation and adipogenesis in human subcutaneous abdominal and gluteal AT and its constituent preadipocytes. METHODS: BMP2 expression was measured in whole AT and immortalised preadipocytes via qPCR and Western blot; secreted/circulating BMP2 was measured by ELISA. The effect of BMP2 on preadipocyte proliferation was evaluated using a fluorescent assay. BMP2's effect on adipogenesis in immortalised preadipocytes was determined via qPCR of adipogenic markers and cellular triacylglycerol (TAG) accumulation. BMP2-SMAD1/5/8 signalling was assessed in immortalised preadipocytes via Western blot and qPCR of ID1 expression. RESULTS: BMP2 was expressed and released by abdominal and gluteal AT and preadipocytes. Exogenous BMP2 dose dependently promoted adipogenesis in abdominal preadipocytes only; 50 ng/ml BMP2 increased PPARG2 expression (10-fold compared to vehicle, p < 0.001) and TAG accumulation (3-fold compared to vehicle; p < 0.001). BMP2 stimulated SMAD1/5/8 phosphorylation and ID1 expression in abdominal and gluteal preadipocytes but this was blocked by 500 nM K02288, a type 1 BMP receptor inhibitor (p < 0.001). Co-administration of 500 nM K02288 also inhibited the pro-adipogenic effect of 50 ng/ml BMP2 in abdominal cells; >90% inhibition of TAG accumulation (p < 0.001) and ~50% inhibition of PPARG2 expression (p < 0.001). The endogenous iron regulator erythroferrone reduced BMP2-SMAD1/5/8 signalling by ~30% specifically in subcutaneous abdominal preadipocytes (p < 0.01), suggesting it plays a role in restricting the expansion of the body's largest AT depot during energy deficiency. Additionally, a waist-hip ratio-increasing common polymorphism near BMP2 is an eQTL associated with ~15% lower BMP2 expression in abdominal and gluteal AT (p < 0.05) as well as altered adipocyte size in male abdominal AT (p < 0.05). CONCLUSIONS: These data implicate BMP2-SMAD1/5/8 signalling in depot-specific preadipocyte development and abdominal AT expansion in humans.

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Authors
Denton, N. F., Eghleilib, M., Al-Sharifi, S., Todorčević, M., Neville, M. J., Loh, N., Drakesmith, A., Karpe, F., & Pinnick, K. E.
Affiliations
University of Oxford (GB)
Corresponding author
  • Karpe, Fredrik
  • Pinnick, Katherine E.
Venue
International Journal of Obesity
Published
2019-07-19
Volume
43
Issue
12
Pages
2458-2468
ISSN
  • 0307-0565 (ISSN-L)
  • 1476-5497
OpenAlex
W2963138219
Cited by
41
References
49
Citations by year
2026: 3 · 2025: 5 · 2024: 12 · 2023: 8 · 2022: 6 · 2021: 4 · 2020: 3
FWCI
2.21
Type
journal article
Language
en
Open access
Locations
  • International Journal of Obesity (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institute for Health and Care Research
  • British Heart Foundation (RG17/1/32663)
  • Department of Health and Social Care
  • Medical Research Council (MC_UU_00008/10)
  • NIHR Oxford Biomedical Research Centre
Topics
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › TGF-β signaling in diseases
Keywords
BMP-2, adipogenesis, subcutaneous adipose tissue, abdominal fat, gluteal adipose tissue, preadipocytes, PPARγ2, triglyceride accumulation, erythroferrone, iron regulation, expression quantitative trait loci, waist-to-hip ratio
MeSH terms
Adipose Tissue, Adult, Aged, Cells, Cultured, Female, Humans, Male, Middle Aged, Signal Transduction, Body Mass Index, Adipocytes, Cell Proliferation, Adipogenesis, Smad Proteins, Receptor-Regulated, Bone Morphogenetic Protein 2

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