Leptin and TGF-β1 Downregulate PREP1 Expression in Human Adipose-Derived Mesenchymal Stem Cells and Mature Adipocytes - Aix-Marseille Université Accéder directement au contenu
Article Dans Une Revue Frontiers in Cell and Developmental Biology Année : 2021

Leptin and TGF-β1 Downregulate PREP1 Expression in Human Adipose-Derived Mesenchymal Stem Cells and Mature Adipocytes

Andreina Bruno
  • Fonction : Auteur
Caterina Di Sano
  • Fonction : Auteur
Hans-Uwe Simon
  • Fonction : Auteur
Angelo Maria Patti
  • Fonction : Auteur
Serena Di Vincenzo
  • Fonction : Auteur
Paola Dino
  • Fonction : Auteur
Vittoria D’esposito
  • Fonction : Auteur
Pietro Formisano
Francesco Beguinot
  • Fonction : Auteur
Elisabetta Pace
  • Fonction : Auteur

Résumé

Adipose tissue is widely recognized as an extremely active endocrine organ producing adipokines as leptin that bridge metabolism and the immune system. Pre-B-cell leukemia homeobox (Pbx)-regulating protein-1 (PREP1) is a ubiquitous homeodomain transcription factor involved in the adipogenic differentiation and insulin-sensitivity processes. Leptin, as pleiotropic adipokine, and TGF-β, known to be expressed by primary pre-adipocytes [adipose-derived stem cells (ASCs)] and mature differentiated adipocytes, modulate inflammatory responses. We aimed to assess for the first time if leptin and TGF-β interfere with PREP1 expression in both ASCs and mature differentiated adipocytes. Human ASCs were isolated from subcutaneous adipose liposuction and, after expansion, fully differentiated to mature adipocytes. In both ASCs and adipocytes, leptin and TGF-β1 significantly decreased the expression of PREP1, alone and following concurrent Toll-like receptor 4 (TLR4) activation. Moreover, in adipocytes, but not in ASCs, leptin increased TLR4 and IL-33 expression, whereas TGF-β1 enhanced TLR4 and IL-6 expression. Taken together, we provide evidence for a direct regulation of PREP1 by leptin and TGF-β1 in ASCs and mature adipocytes. The effects of leptin and TGF-β1 on immune receptors and cytokines, however, are limited to mature adipocytes, suggesting that modulating immune responses depends on the differentiation of ASCs. Further studies are needed to fully understand the regulation of PREP1 expression and its potential for the development of new therapeutic approaches in obesity-related diseases.
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hal-03654486 , version 1 (24-10-2023)

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Andreina Bruno, Caterina Di Sano, Hans-Uwe Simon, Pascal Chanez, Angelo Maria Patti, et al.. Leptin and TGF-β1 Downregulate PREP1 Expression in Human Adipose-Derived Mesenchymal Stem Cells and Mature Adipocytes. Frontiers in Cell and Developmental Biology, 2021, 9, pp.700481. ⟨10.3389/fcell.2021.700481⟩. ⟨hal-03654486⟩
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