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Updated: Jun 25, 2026

Isolation and Characterization of RNA-Containing Exosomes
09:43

Isolation and Characterization of RNA-Containing Exosomes

Published on: January 9, 2012

Cell to cell signalling via exosomes through esRNA

Jan Lotvall1, Hadi Valadi

  • 1Department of Internal Medicine, Goteborg University, Goteborg, Sweden. jan.lotvall@gu.se

Cell Adhesion & Migration
|March 6, 2009
PubMed

Insights

Mast cells release exosomes carrying functional RNA (esRNA) to neighboring cells, enabling new protein synthesis. This discovery reveals a novel intercellular communication pathway mediated by RNA-carrying exosomes.

Area of Science:

  • Cell biology
  • Molecular biology
  • Immunology

Background:

  • Exosomes are endosomal vesicles released by cells.
  • Exosomes play roles in immune responses, including antigen presentation.
  • Mast cell-derived exosomes contain mRNA and microRNA.

Purpose of the Study:

  • To investigate the function of RNA within mast cell-derived exosomes.
  • To determine if RNA can be transferred between mast cells via exosomes.
  • To explore the potential of RNA-carrying exosomes as intercellular communication mediators.

Main Methods:

  • Isolation and characterization of exosomes from mast cells.
  • Analysis of RNA content (mRNA and microRNA) within exosomes.
  • Co-culture experiments to assess RNA transfer and functionality in recipient cells.

Main Results:

  • Mast cell exosomes were confirmed to contain both mRNA and microRNA.
  • Functional RNA transfer (esRNA) was observed between mast cells through exosome fusion.
  • Delivered mRNA was translated into proteins in recipient mast cells, demonstrating functional RNA signaling.

Conclusions:

  • Exosomes serve as carriers for functional RNA (esRNA) between mast cells.
  • This RNA transfer represents a novel mechanism of intercellular communication.
  • Exosomes may represent a diverse class of signaling vesicles with RNA-mediated communication capabilities.

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