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Characterization of Immune Cell-derived Extracellular Vesicles and Studying Functional Impact on Cell Environment
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Characterization of Immune Cell-derived Extracellular Vesicles and Studying Functional Impact on Cell Environment

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Modulation of cellular function through immune-activated exosomes

Lynn Pulliam1, Archana Gupta2

  • 11 Departments of Laboratory Medicine and Medicine, San Francisco Veterans Affairs Medical Center, University of California , San Francisco, San Francisco, California.

DNA and Cell Biology
|May 7, 2015
PubMed

Insights

Extracellular vesicles, including exosomes, carry microRNAs (miRs) that regulate gene expression. Inflammatory conditions alter monocyte miR expression, affecting exosome content and target cells.

Area of Science:

  • Cell biology
  • Molecular biology
  • Immunology

Background:

  • Extracellular vesicles (EVs), such as exosomes, are released by cells and contain microRNAs (miRs).
  • miRs within exosomes regulate gene expression in recipient cells by targeting messenger RNAs (mRNAs).
  • Peripheral inflammation can alter miR expression in immune cells like monocytes.

Purpose of the Study:

  • To investigate how peripheral inflammatory conditions affect miR expression in monocytes.
  • To understand the impact of these miR changes on exosome content.
  • To explore how altered exosome content influences end-organ target cells.

Main Methods:

  • Analysis of miR expression in circulating monocytes under inflammatory conditions.
  • Characterization of exosome content from monocyte-derived macrophages.
  • Assessment of the effects of modified exosomes on target cells (not explicitly detailed but implied).

Main Results:

  • Peripheral inflammation modulates miR expression in circulating monocytes.
  • Changes in monocyte-derived macrophage miR expression alter the composition of released exosomes.
  • Modified exosome content has the potential to affect end-organ target cells.

Conclusions:

  • Monocyte miR expression is sensitive to peripheral inflammation.
  • Exosomes serve as mediators of intercellular communication influenced by inflammatory states.
  • Dysregulated exosome content due to inflammation may contribute to disease pathogenesis.

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