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Related Experiment Video

Updated: Aug 20, 2025

Characterization of Immune Cell-derived Extracellular Vesicles and Studying Functional Impact on Cell Environment
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Astrocytes-Derived Small Extracellular Vesicles Hinder Glioma Growth.

Carmela Serpe1, Antonio Michelucci2, Lucia Monaco1

  • 1Department of Physiology and Pharmacology, Sapienza University, 00185 Rome, Italy.

Biomedicines
|November 26, 2022
PubMed
Summary

Astrocyte-derived extracellular vesicles (EVs) hinder glioblastoma growth. These EVs deliver microRNA-124 (miR124), which inhibits the volume-regulated anion channel (VRAC), reducing tumor cell invasion.

Keywords:
astrocytesgliomamiR124small extracellular vesiclesvolume-regulated anion channels

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Cancer Research

Background:

  • Extracellular vesicles (EVs) mediate intercellular communication in the brain, influencing both normal homeostasis and pathological conditions like glioblastoma.
  • Astrocytes play a dynamic role in glioblastoma progression, potentially acting as either pro-tumoral or anti-tumoral agents.

Purpose of the Study:

  • To investigate the role of astrocyte-derived small extracellular vesicles (sEVs) in glioblastoma.
  • To identify specific factors within astrocyte-derived EVs (ADEVs) that inhibit tumor cell growth and invasion.

Main Methods:

  • Characterization of astrocyte-derived small EVs (sEVs).
  • Analysis of the molecular cargo of ADEVs.
  • Assessing the impact of ADEVs and identified factors on glioma cell lines (GL261).
  • Measuring the expression and function of the volume-regulated anion channel (VRAC).

Main Results:

  • Astrocyte-derived sEVs demonstrated a defensive mechanism against glioblastoma cell growth and invasion.
  • A specific microRNA, miR124, was identified as a key factor enriched in ADEVs.
  • miR124 transfer reduced both the expression and function of the volume-regulated anion channel (VRAC) in glioma cells.
  • Inhibition of VRAC by miR124 led to decreased migration and invasion of murine glioma GL261 cells.

Conclusions:

  • Astrocyte-derived EVs, particularly miR124, represent a potential therapeutic strategy against glioblastoma by inhibiting tumor cell invasion.
  • The miR124-mediated downregulation of VRAC is a key mechanism by which astrocytes exert anti-tumoral effects.
  • Understanding EV-mediated crosstalk is crucial for developing novel glioblastoma treatments.