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Updated: Aug 28, 2025

Mechanism of Regulation of Adipocyte Numbers in Adult Organisms Through Differentiation and Apoptosis Homeostasis
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Mechanism of Regulation of Adipocyte Numbers in Adult Organisms Through Differentiation and Apoptosis Homeostasis

Published on: June 3, 2016

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HMG20A Inhibit Adipogenesis by Transcriptional and Epigenetic Regulation of MEF2C Expression

Ruixiao Li1, Shan Meng1, Mengting Ji1

  • 1College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China.

International Journal of Molecular Sciences
|September 23, 2022
PubMed

Insights

HMG20A protein negatively regulates fat cell formation (adipogenesis). It achieves this by controlling MEF2C gene expression, with LSD1 protein modulating this effect, offering insights into metabolic disease regulation.

Area of Science:

  • Molecular Biology
  • Epigenetics
  • Metabolic Disease Research

Background:

  • Obesity and metabolic diseases pose significant health risks.
  • Transcription factors are central to understanding adipogenesis.
  • HMG20A is upregulated during early porcine intramuscular fat adipogenesis.

Purpose of the Study:

  • Investigate the role of HMG20A in adipogenesis.
  • Elucidate the regulatory mechanism of HMG20A in fat cell differentiation.
  • Identify downstream targets and interacting proteins of HMG20A.

Main Methods:

  • Gain- and loss-of-function studies in cell models (SVF, C3H10T1/2).
  • RNA sequencing (RNA-seq) for differential gene expression analysis.
  • Quantitative reverse transcription PCR (qRT-PCR) and Chromatin immunoprecipitation PCR (ChIP-PCR).

Main Results:

  • HMG20A significantly inhibits adipocyte differentiation.
  • MEF2C identified as a direct transcriptional target of HMG20A.
  • LSD1 protein interacts with HMG20A, alleviating its inhibitory effect on adipogenesis.
  • HMG20A and LSD1 cooperate to increase H3K4me2 at the MEF2C promoter, enhancing MEF2C expression.

Conclusions:

  • HMG20A acts as a key negative regulator of adipogenesis.
  • The HMG20A-MEF2C axis is crucial for controlling fat cell differentiation.
  • Epigenetic modifications involving HMG20A and LSD1 play a significant role in regulating adipogenesis.
Keywords:
C3H10T1/2 cellsHMG20ALSD1MEF2Cadipogenesisintramuscular fat

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