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Related Experiment Video

Updated: Apr 6, 2026

Isolation of Whole Cell Protein Lysates from Mouse Facial Processes and Cultured Palatal Mesenchyme Cells for Phosphoprotein Analysis
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Competing Repressive Factors Control Bone Morphogenetic Protein 2 (BMP2) in Mesenchymal Cells.

Anastasios Fotinos1, David T Fritz1, Steven Lisica1

  • 1Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers New Jersey Medical School, Newark, New Jersey.

Journal of Cellular Biochemistry
|July 28, 2015
PubMed
Summary

This study reveals how microRNAs and proteins like HuR and AUF1 regulate bone morphogenetic protein 2 (BMP2) expression. These interactions at the BMP2 3'untranslated region are crucial for mesenchymal cell differentiation.

Keywords:
GENE REGULATIONGROWTH FACTORMESENCHYMAL CELLPOST-TRANSCRIPTIONAL

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Area of Science:

  • Molecular Biology
  • Developmental Biology
  • Gene Regulation

Background:

  • Bone morphogenetic protein 2 (BMP2) synthesis is critical for mesenchymal cell differentiation.
  • The BMP2 3'untranslated region (3'UTR) contains an AU-rich element (ARE) involved in gene expression regulation.
  • This ARE is a potential binding site for microRNAs (miRNAs) and regulatory proteins.

Purpose of the Study:

  • To investigate the regulatory factors controlling BMP2 expression via its 3'UTR.
  • To elucidate the interplay between miRNAs and RNA-binding proteins at the BMP2 ARE.
  • To understand the mechanisms of gene activation and repression at this specific regulatory site.

Main Methods:

  • Computational analysis to predict miRNA binding sites.
  • RNA-binding assays to confirm protein interactions (HuR).
  • Mutational analysis and RNA interference to assess the roles of HuR and AUF1.
  • Experimental validation of miRNA-mediated regulation.

Main Results:

  • HuR (Hu antigen R) directly binds the BMP2 ARE and activates gene expression.
  • A specific miRNA was shown to counteract HuR-mediated activation.
  • Evidence suggests AUF1 (AU-factor-1) contributes to the repressive activity of the 3'UTR in mesenchymal cells.
  • This study demonstrates direct protein/miRNA interactions at the same regulatory site.

Conclusions:

  • The BMP2 3'UTR is a complex regulatory hub involving both protein activators (HuR) and repressors (AUF1).
  • miRNAs play a significant role in modulating BMP2 expression by interacting with the ARE and influencing protein binding.
  • These findings provide novel insights into the intricate post-transcriptional regulation of BMP2, essential for mesenchymal cell fate.