Title

Exosomes Produced from 3D Cultures of MSCs by Tangential Flow Filtration Show Higher Yield and Improved Activity

UMMS Affiliation

MassBiologics; RNA Therapeutics Institute; Department of Medicine; Mass Spectrometry Facility

Publication Date

2018-12-05

Document Type

Article

Disciplines

Cell Biology | Cells | Molecular Biology | Nucleic Acids, Nucleotides, and Nucleosides | Therapeutics

Abstract

Exosomes can deliver therapeutic RNAs to neurons. The composition and the safety profile of exosomes depend on the type of the exosome-producing cell. Mesenchymal stem cells are considered to be an attractive cell type for therapeutic exosome production. However, scalable methods to isolate and manufacture exosomes from mesenchymal stem cells are lacking, a limitation to the clinical translation of exosome technology. We evaluate mesenchymal stem cells from different sources and find that umbilical cord-derived mesenchymal stem cells produce the highest exosome yield. To optimize exosome production, we cultivate umbilical cord-derived mesenchymal stem cells in scalable microcarrier-based three-dimensional (3D) cultures. In combination with the conventional differential ultracentrifugation, 3D culture yields 20-fold more exosomes (3D-UC-exosomes) than two-dimensional cultures (2D-UC-exosomes). Tangential flow filtration (TFF) in combination with 3D mesenchymal stem cell cultures further improves the yield of exosomes (3D-TFF-exosomes) 7-fold over 3D-UC-exosomes. 3D-TFF-exosomes are seven times more potent in small interfering RNA (siRNA) transfer to neurons compared with 2D-UC-exosomes. Microcarrier-based 3D culture and TFF allow scalable production of biologically active exosomes from mesenchymal stem cells. These findings lift a major roadblock for the clinical utility of mesenchymal stem cell exosomes.

Keywords

exosomes, mesenchymal stem cell, tangential flow filtration

DOI of Published Version

10.1016/j.ymthe.2018.09.015

Source

Mol Ther. 2018 Dec 5;26(12):2838-2847. doi: 10.1016/j.ymthe.2018.09.015. Epub 2018 Sep 22. Link to article on publisher's site

Journal/Book/Conference Title

Molecular therapy : the journal of the American Society of Gene Therapy

Related Resources

Link to Article in PubMed

PubMed ID

30341012

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