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Related Experiment Video

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Purification and microRNA Profiling of Exosomes Derived from Blood and Culture Media
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Purification of Leukemia-Derived Exosomes to Study Microenvironment Modulation.

Marina Wierz1, Sandrine Pierson1, Ernesto Gargiulo1

  • 1Laboratory of Experimental Cancer Research, Department of Oncology, Luxembourg Institute of Health, Luxembourg, Luxembourg.

Methods in Molecular Biology (Clifton, N.J.)
|November 23, 2018
PubMed
Summary

This study efficiently produces large quantities of exosomes from leukemia cells using CELLine bioreactors. The purified exosomes are suitable for detailed characterization and analysis of their role in cancer pathology.

Keywords:
Density gradient ultracentrifugationExosomesImaging flow cytometryIntercellular communicationLeukemiaPurificationTwo-compartment bioreactor

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Cancer Research

Background:

  • Exosomes are extracellular vesicles crucial for intercellular communication.
  • They play roles in physiological processes and cancer pathogenesis, including leukemia.
  • Isolating exosomes aids in understanding their function in disease.

Purpose of the Study:

  • To describe an efficient method for producing large quantities of exosomes from leukemic cell lines.
  • To detail the isolation and purification of these exosomes.
  • To prepare exosomes for downstream characterization and functional analysis.

Main Methods:

  • Utilized CELLine bioreactors with two-compartment technology for exosome production.
  • Employed differential centrifugation and ultracentrifugation with a 17% OptiPrep™ density gradient for purification.
  • Prepared exosomes for characterization via Western blotting and imaging flow cytometry (ImageStream).

Main Results:

  • Successfully produced large quantities of exosomes from leukemic cell lines.
  • Established an efficient purification protocol combining centrifugation and density gradient ultracentrifugation.
  • Exosomes were validated for downstream analyses, including cellular internalization studies.

Conclusions:

  • CELLine bioreactors provide an effective means for large-scale exosome production from leukemia cells.
  • The described purification method yields exosomes suitable for comprehensive molecular and functional characterization.
  • This approach facilitates further investigation into exosome involvement in leukemia and intercellular communication.