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Functional Analysis of ESCRT-Positive Extracellular Vesicles in the Drosophila Wing Imaginal Disc

  • Tamás Matusek
  • Pascal ThérondEmail author
  • Maximilian FürthauerEmail author
Protocol
Part of the Methods in Molecular Biology book series (MIMB, volume 1998)

Abstract

A large number of studies have shown that proteins of the Endosomal Sorting Complex Required for Transport (ESCRT) can trigger the biogenesis of different types of Extracellular Vesicles (EV). The functions that these vesicular carriers exert in vivo remain, however, poorly understood. In this chapter, we describe a series of experimental approaches that we established in the Drosophila wing imaginal disc to study the importance of ESCRT-positive EVs for the extracellular transport of signaling molecules, as exemplified by a functional analysis of the mechanism of secretion and propagation of the major developmental morphogen Hedgehog (Hh).

Through the combined use of genetic, cell biological, and imaging approaches, we investigate four important aspects of exovesicle biology: (1) The genetic identification of ESCRT proteins that are specifically required for Hh secretion. (2) The imaging of ESCRT and Hh-positive EVs in the lumenal space of both living and fixed wing imaginal discs. (3) The receptor-mediated capture of Hh-containing EVs on the surface of Hh-receiving cells. (4) The effect of manipulations of ESCRT function on the extracellular pool of Hh ligands.

Key words

ESCRT Hedgehog Drosophila Extracellular vesicles Exosomes Ectosomes 

Notes

Acknowledgments

This work was supported by the LABEX SIGNALIFE (ANR-11-LABX-0028-01), by the Fondation pour la Recherche Médicale, and by ANR ANR-15-CE13-0002. T. M was supported by the Fondation ARC pour la Recherche Contre le Cancer and Ligue Nationale Contre le Cancer. PT is supported by Ligue Nationale Contre le Cancer “Équipe labellisée”. M.F. was supported by the CNRS/INSERM ATIP/Avenir program, ARC (SFI20111203750), and HFSP (CDA 00036/2010).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Université Côte d’Azur, CNRS, InsermiBVFrance

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