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Related Experiment Video

Updated: May 13, 2025

Calcification of Vascular Smooth Muscle Cells and Imaging of Aortic Calcification and Inflammation
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The m6A reader YTHDF2 protects vascular smooth muscle cells against the osteogenic differentiation through targeting

Lanmei Li1,2, Meijuan Cheng1,2, Jingjing Jin1,2

  • 1Department of Nephrology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China.

Renal Failure
|April 15, 2025
PubMed
Summary
This summary is machine-generated.

Vascular calcification (VC) is a complication of chronic kidney disease (CKD). This study shows that YTHDF2 protects against VC by degrading Runx2 mRNA, inhibiting VSMC osteogenic differentiation.

Keywords:
Runx2Vascular calcificationYTHDF2m6Aosteoblast phenotypic transition

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pathology

Background:

  • Vascular calcification (VC) is a pathological process in chronic kidney disease (CKD) associated with increased mortality and limited treatment options.
  • N6-methyladenosine (m6A) is a prevalent RNA modification, and its reader YTHDF2 mediates mRNA degradation.
  • The role of YTHDF2 in VC pathogenesis is not well understood.

Purpose of the Study:

  • To investigate the role and molecular mechanism of YTHDF2 in vascular calcification (VC).
  • To explore YTHDF2's effect on vascular smooth muscle cell (VSMC) osteogenic differentiation.

Main Methods:

  • Studied YTHDF2 expression in *in vivo* and *in vitro* VC models.
  • Assessed the functional impact of YTHDF2 overexpression and deficiency on VSMC phenotype and calcification.
  • Utilized RNA immunoprecipitation-qPCR (RIP-qPCR) and luciferase reporter assays to confirm YTHDF2-Runx2 interaction and m6A site.
  • Performed actinomycin D assays to determine Runx2 mRNA stability.

Main Results:

  • YTHDF2 expression was significantly downregulated in VC models.
  • Overexpression of YTHDF2 inhibited VSMC osteogenic transdifferentiation and reduced calcium deposition.
  • YTHDF2 deficiency exacerbated VC.
  • Mechanistically, YTHDF2 directly binds to m6A-modified Runx2 mRNA, promoting its degradation and thus suppressing VSMC osteogenic development.

Conclusions:

  • YTHDF2 plays a protective role in vascular calcification (VC) by inhibiting VSMC osteogenic differentiation.
  • YTHDF2 targets Runt-related transcription factor 2 (Runx2) mRNA for degradation, preventing VC.
  • YTHDF2 represents a potential therapeutic target for managing VC.