ATP modifies the proteome of extracellular vesicles released by microglia and influences their action on astrocytes

Francesco Drago, Marta Lombardi, Ilaria Prada, Martina Gabrielli, Pooja Joshi, Dan Cojoc, Julien Franck, Isabelle Fournier, Jacopo Vizioli, Claudia Verderio

Research output: Contribution to journalArticle

Abstract

Extracellular ATP is among molecules promoting microglia activation and inducing the release of extracellular vesicles (EVs), which are potent mediators of intercellular communication between microglia and the microenvironment. We previously showed that EVs produced under ATP stimulation (ATP-EVs) propagate a robust inflammatory reaction among astrocytes and microglia in vitro and in mice with subclinical neuroinflammation (Verderio et al., 2012). However, the proteome of EVs released upon ATP stimulation has not yet been elucidated. In this study we applied a label free proteomic approach to characterize the proteome of EVs released constitutively and during microglia activation with ATP. We show that ATP drives sorting in EVs of a set of proteins implicated in cell adhesion/extracellular matrix organization, autophagy-lysosomal pathway and cellular metabolism, that may influence the response of recipient astrocytes to EVs. These data provide new clues to molecular mechanisms involved in microglia response to ATP and in microglia signaling to the environment via EVs.

Original languageEnglish
Article number910
JournalFrontiers in Pharmacology
Volume8
Issue numberDEC
DOIs
Publication statusPublished - Dec 13 2017

    Fingerprint

Keywords

  • Astrocyte activation
  • ATP
  • Extracellular vesicles
  • Microglia
  • Proteomics

ASJC Scopus subject areas

  • Pharmacology
  • Pharmacology (medical)

Cite this