Cells release subpopulations of exosomes with distinct molecular and biological properties

Eduard Willms, Henrik J. Johansson, Imre Mäger, Yi Lee, K. Emelie M. Blomberg, Mariam Sadik, Amr Alaarg, C.I. Edvard Smith, Janne Lehtio, Samir El Andaloussi, Matthew J.A. Wood*, Pieter Vader

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

320 Citations (Scopus)
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Abstract

Cells release nano-sized membrane vesicles that are involved in intercellular communication by transferring biological information between cells. It is generally accepted that cells release at least three types of extracellular vesicles (EVs): apoptotic bodies, microvesicles and exosomes. While a wide range of putative biological functions have been attributed to exosomes, they are assumed to represent a homogenous population of EVs. We hypothesized the existence of subpopulations of exosomes with defined molecular compositions and biological properties. Density gradient centrifugation of isolated exosomes revealed the presence of two distinct subpopulations, differing in biophysical properties and their proteomic and RNA repertoires. Interestingly, the subpopulations mediated differential effects on the gene expression programmes in recipient cells. In conclusion, we demonstrate that cells release distinct exosome subpopulations with unique compositions that elicit differential effects on recipient cells. Further dissection of exosome heterogeneity will advance our understanding of exosomal biology in health and disease and accelerate the development of exosome-based diagnostics and therapeutics.
Original languageEnglish
Article number22519
Number of pages12
JournalScientific reports
Volume6
DOIs
Publication statusPublished - 2016

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