Related Experiment Video

Updated: Feb 28, 2026

LINE-1 Methylation Analysis in Mesenchymal Stem Cells Treated with Osteosarcoma-Derived Extracellular Vesicles
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Tyrosine-Peptide Analog Modulates Extracellular Vesicles miRNAs Cargo from Mesenchymal Stem/Stromal and Cancer Cells

Michelle B R G Ley1,2,3,4, Karina Galoian2, Daniel A Martinez2

  • 1Department of Biomedical Engineering, University of Miami, Miami, FL 33146, USA.

Biomolecules
|February 27, 2026
PubMed

Insights

This study reveals how a novel peptide therapy alters microRNA networks within extracellular vesicles from sarcoma and stem cells. This reprogramming impacts key cancer signaling pathways, offering new therapeutic insights for soft tissue sarcoma.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Soft tissue sarcoma presents treatment challenges due to heterogeneity and therapy resistance.
  • Extracellular vesicles (EVs) are crucial in tumor-stroma communication, but their modulation by stemness-targeted therapies is not well understood.

Purpose of the Study:

  • To investigate how a synthetic tyrosine peptide analog (TPA) affects the microRNA (miRNA) cargo of EVs from mesenchymal stem/stromal cells (MSCs) and sarcoma cells (SCs).
  • To analyze the impact of TPA-induced miRNA changes on cellular signaling pathways relevant to sarcoma.

Main Methods:

  • Isolation and characterization of EVs from IFP-MSCs and SCs.
  • miRNA profiling of EVs before and after TPA treatment.
  • Pathway enrichment analysis and in silico miRNA-gene interaction prediction.

Main Results:

  • TPA significantly altered miRNA expression in EVs, with 182 miRNAs regulated (≥2-fold change).
  • A conserved core of 149 miRNAs was shared across all EV groups.
  • TPA reduced tumor-associated miRNAs like miR-1246 and modulated pathways including MAPK, Wnt, and TGF-β signaling. VEGFA was identified as a key predicted target.

Conclusions:

  • Stemness-targeted therapy with TPA quantitatively reprograms the miRNA cargo of EVs.
  • This reprogramming is cell-type dependent and reshapes EV-mediated signaling networks in sarcoma.
  • Findings provide insights into novel therapeutic strategies targeting sarcoma through EV modulation.
Keywords:
TPA therapycell-free therapeuticsdrug resistanceexosomesextracellular vesiclesmicroRNA profilingsarcomastem cellsstemness modulationtumor microenvironment

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