Protein and Molecular Characterization of a Clinically Compliant Amniotic Fluid Stem Cell-Derived Extracellular Vesicle Fraction Capable of Accelerating Muscle Regeneration Through Enhancement of Angiogenesis.

Abstract:

:The secretome of human amniotic fluid stem cells (AFSCs) has great potential as a therapeutic agent in regenerative medicine. However, it must be produced in a clinically compliant manner before it can be used in humans. In this study, we developed a means of producing a biologically active secretome from AFSCs that is free of all exogenous molecules. We demonstrate that the full secretome is capable of promoting stem cell proliferation, migration, and protection of cells against senescence. Furthermore, it has significant anti-inflammatory properties. Most importantly, we show that it promotes tissue regeneration in a model of muscle damage. We then demonstrate that the secretome contains extracellular vesicles (EVs) that harbor much, but not all, of the biological activity of the whole secretome. Proteomic characterization of the EV and free secretome fraction shows the presence of numerous molecules specific to each fraction that could be key regulators of tissue regeneration. Intriguingly, we show that the EVs only contain miRNA and not mRNA. This suggests that tissue regeneration in the host is mediated by the action of EVs modifying existing, rather than imposing new, signaling pathways. The EVs harbor significant anti-inflammatory activity as well as promote angiogenesis, the latter may be the mechanistic explanation for their ability to promote muscle regeneration after cardiotoxin injury.

journal_name

Stem Cells Dev

authors

Mellows B,Mitchell R,Antonioli M,Kretz O,Chambers D,Zeuner MT,Denecke B,Musante L,Ramachandra DL,Debacq-Chainiaux F,Holthofer H,Joch B,Ray S,Widera D,David AL,Huber TB,Dengjel J,De Coppi P,Patel K

doi

10.1089/scd.2017.0089

subject

Has Abstract

pub_date

2017-09-15 00:00:00

pages

1316-1333

issue

18

eissn

1547-3287

issn

1557-8534

journal_volume

26

pub_type

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