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The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which...
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YTHDF1 Enhances Chondrogenic Differentiation by Activating the Wnt/β-Catenin Signaling Pathway.

Xiaoming Yang1,2, Youxi Lin2, Taiqiu Chen2

  • 1Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, P. R. China.

Stem Cells and Development
|January 17, 2023
PubMed
Summary

The m6A reader YTHDF1 promotes cartilage formation by activating the Wnt/β-catenin pathway. This study reveals YTHDF1

Keywords:
Wnt/β-catenin signaling pathwayYTHDF1chondrogenic differentiationm6A mRNA methylation

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Area of Science:

  • Stem cell biology
  • Epigenetics
  • Molecular biology

Background:

  • Cartilage formation (chondrogenesis) is crucial for skeletal development and repair.
  • The regulatory mechanisms of chondrogenesis are not fully understood.
  • N6-methyladenosine (m6A) mRNA methylation is a key posttranscriptional regulator.

Purpose of the Study:

  • To investigate the role of YTH N6-methyladenosine RNA binding protein 1 (YTHDF1) in chondrogenic differentiation.
  • To elucidate the molecular mechanisms by which YTHDF1 regulates chondrogenesis.

Main Methods:

  • Western blotting (WB) to assess protein expression.
  • Quantitative PCR and immunohistochemistry for gene and protein analysis.
  • Alcian blue staining for cartilage matrix detection.
  • RNA sequencing and molecular biology assays to explore signaling pathways.

Main Results:

  • YTHDF1 expression increased during chondrogenesis of human bone marrow mesenchymal stem cells (hBMSCs).
  • Overexpression of YTHDF1 enhanced cartilage matrix synthesis and chondrogenic marker expression.
  • YTHDF1 knockdown inhibited chondrogenesis.
  • YTHDF1 was found to activate the Wnt/β-catenin signaling pathway.

Conclusions:

  • YTHDF1 plays a critical role in promoting chondrogenic differentiation.
  • YTHDF1 facilitates chondrogenesis by activating the Wnt/β-catenin signaling pathway.
  • Targeting YTHDF1 may offer therapeutic strategies for cartilage repair.