PPARγ-dependent transcriptional regulation of Vaspin expression in adipocytes

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ID: 314535
2026
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Abstract
Vaspin is an adipokine involved in metabolic regulation; however, the mechanisms governing its transcription in obesity remain unclear. Here, we investigated the role of peroxisome proliferator-activated receptor γ (PPARγ) in regulating Vaspin expression in white adipose tissue (WAT). Vaspin expression was markedly reduced in the WAT of obese ob/ob mice and was restored following rosiglitazone treatment. Reporter assays revealed that ligand-activated PPARγ promotes Vaspin transcription through a weak but functional PPAR response element (PPRE). Promoter deletion analysis further showed that this PPRE contributes to transcriptional activation, whereas additional promoter regions containing C/EBP-responsive elements sustain residual transcriptional activity. These findings suggest that Vaspin expression is regulated, at least partly, through a non-canonical PPARγ-dependent mechanism involving cooperative transcriptional regulation. Our findings provide insight into adipokine regulation in obesity and highlight gene-specific differences in PPARγ-mediated transcription.
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openalex_W7162039854 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Daisuke Aibara, Kimihiko Matsusue
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Journal bioscience biotechnology and biochemistry
Year 2026
DOI
10.1093/bbb/zbag073
URL
https://doi.org/10.1093/bbb/zbag073
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