Benchtop Isolation and Characterisation of Small Extracellular Vesicles from Human Mesenchymal Stem Cells

Kian Leong Tan, Wui Chuen Chia, Chee Wun How, Yin Sim Tor, Pau Loke Show, Qi Hao Daniel Looi, Jhi Biau Foo

Research output: Contribution to journalReview articlepeer-review

32 Scopus citations

Abstract

The objective of this study is to develop a simple protocol to isolate and characterise small extracellular vesicles (sEVs) from human umbilical cord-derived MSCs (hUC-MSCs). hUC-MSCs were characterised through analysis of morphology, immunophenotyping and multidifferentiation ability. SEVs were successfully isolated by ultrafiltration from the conditioned medium of hUC-MSCs. The sEVs’ size distribution, intensity within a specific surface marker population were measured with zetasizer or nanoparticle tracking analysis. The expression of surface and internal markers of sEVs was also assessed by western blotting. Morphology of hUC-MSCs displayed as spindle-shaped, fibroblast-like adherent cells. Phenotypic analysis by flow cytometry revealed that hUC-MSCs expressed MSC surface marker, including CD90, CD73, CD105, CD44 and exhibited the capacity for osteogenic, adipogenic and chondrogenic differentiation. Populations of sEVs with CD9, CD63 and CD81 positive were detected with size distribution in the diameter of 63.2 to 162.5 nm. Typical sEVs biomarkers such as CD9, CD63, CD81, HSP70 and TSG101 were also detected with western blotting. Our study showed that sEVs from hUC-MSCs conditioned medium were successfully isolated and characterised. Downstream application of hUC-MSCs-sEVs will be further explored.

Original languageBritish English
Pages (from-to)780-791
Number of pages12
JournalMolecular Biotechnology
Volume63
Issue number9
DOIs
StatePublished - Sep 2021

Keywords

  • Exosome
  • Mesenchymal stem cell
  • NTA
  • Regeneration
  • Small extracellular vesicle

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