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The long noncoding RNA GAS5 negatively regulates the adipogenic differentiation of MSCs by modulating the

Ming Li1, Zhongyu Xie1, Peng Wang1

  • 1Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, People's Republic of China.

Cell Death & Disease
|May 12, 2018
PubMed

Insights

Long noncoding RNA GAS5 negatively regulates mesenchymal stem cell (MSC) adipogenic differentiation by sponging miR-18a. This interaction inhibits miR-18a, ultimately decreasing connective tissue growth factor (CTGF) expression and adipocyte formation.

Area of Science:

  • Stem cell biology
  • Molecular biology
  • Epigenetics

Background:

  • Mesenchymal stem cells (MSCs) are crucial for adipocyte generation, but the mechanisms of adipogenic differentiation remain incompletely understood.
  • Long noncoding RNAs (lncRNAs) are increasingly recognized for their roles in regulating cellular processes, including stem cell differentiation.

Purpose of the Study:

  • To investigate the role of the long noncoding RNA GAS5 in the adipogenic differentiation of MSCs.
  • To elucidate the molecular mechanism by which GAS5 influences adipogenesis.

Main Methods:

  • Quantitative real-time PCR to assess gene expression.
  • Overexpression and knockdown of GAS5 in MSCs.
  • Luciferase reporter assays to confirm direct interaction between GAS5 and miR-18a.
  • miRNA mimic and inhibitor experiments.

Main Results:

  • GAS5 expression was negatively correlated with MSC adipogenic differentiation.
  • GAS5 overexpression inhibited adipocyte formation, while GAS5 knockdown promoted it.
  • GAS5 functions as a competing endogenous RNA (ceRNA) by sponging miR-18a, thereby inhibiting miR-18a's ability to suppress connective tissue growth factor (CTGF) translation.
  • GAS5 negatively regulates MSC adipogenesis by modulating the miR-18a/CTGF axis.

Conclusions:

  • GAS5 plays a significant inhibitory role in MSC adipogenic differentiation.
  • The GAS5/miR-18a/CTGF pathway is a key regulatory mechanism in MSC adipogenesis.
  • GAS5 represents a potential therapeutic target for modulating MSC function and clinical applications.

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