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Updated: Jun 28, 2026
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Mechanism of Regulation of Adipocyte Numbers in Adult Organisms Through Differentiation and Apoptosis Homeostasis
Published on: June 3, 2016
Isorhamnetin represses adipogenesis in 3T3-L1 cells
Jongsung Lee1, Eunsun Jung, Jienny Lee
1Biospectrum Life Science Institute, Gunpo City, Gyunggi Do, Republic of Korea.
Obesity (Silver Spring, Md.)
|October 25, 2008
Summary
Isorhamnetin, a natural compound, inhibits adipocyte differentiation by reducing key adipogenic transcription factors, peroxisome proliferator-activated receptor-gamma (PPAR-gamma) and CCAAT/enhancer-binding protein-alpha (C/EBP-alpha). This suggests a potential role for isorhamnetin in managing obesity.
Area of Science:
- Biochemistry
- Molecular Biology
- Cell Biology
Background:
- Adipocyte dysfunction is linked to obesity and associated metabolic disorders.
- Regulating adipogenesis and adipokine expression are key strategies for obesity prevention.
Purpose of the Study:
- To investigate the effect of isorhamnetin on adipocyte differentiation.
- To elucidate the molecular mechanisms underlying isorhamnetin's action on adipogenesis.
Main Methods:
- Assessed triglyceride accumulation and glycerol-3-phosphate dehydrogenase (GPDH) activity.
- Quantified mRNA expression levels of adipogenic transcription factors (PPAR-gamma, C/EBP-alpha, C/EBP-beta, C/EBP-delta) and PPAR-gamma target genes (LPL, CD36, aP2, LXR-alpha).
- Examined isorhamnetin's impact on adiponectin expression and secretion, including promoter assays.
Main Results:
- Isorhamnetin significantly reduced triglyceride accumulation and GPDH activity, indicating inhibited adipocyte differentiation.
- mRNA levels of PPAR-gamma and C/EBP-alpha were markedly decreased by isorhamnetin, while upstream regulators C/EBP-beta and -delta were unaffected.
- Downregulation of PPAR-gamma target genes and inhibition of adiponectin expression/secretion were observed.
Conclusions:
- Isorhamnetin inhibits adipogenesis by downregulating the expression of key adipogenic transcription factors, PPAR-gamma and C/EBP-alpha.
- The findings suggest that isorhamnetin may offer a novel therapeutic approach for obesity management by targeting adipogenesis.
