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Isolation, Characterization, and Therapeutic Application of Extracellular Vesicles from Cultured Human Mesenchymal Stem Cells
Published on: September 23, 2022
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Human mesenchymal stem cells secrete hyaluronan-coated extracellular vesicles
Uma Thanigai Arasu1, Riikka Kärnä1, Kai Härkönen1
1Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland.
Summary
Bone marrow stem cells secrete hyaluronan-coated extracellular vesicles (EVs) that may drive tissue regeneration. These HA-coated EVs carry molecules involved in cell communication and tissue repair.
Area of Science:
- Stem cell biology
- Extracellular vesicle research
- Tissue engineering
Background:
- Stem cell-derived extracellular vesicles (EVs) are investigated for their role in tissue regeneration.
- Hyaluronan (HA) synthesis is linked to EV shedding.
- The secretion of HA-coated EVs by human mesenchymal stem cells (hMSCs) is explored.
Purpose of the Study:
- To investigate if bone marrow-derived hMSCs secrete HA-coated EVs.
- To characterize the HA-coated EVs and their components.
- To understand the contribution of HA-coated EVs to tissue regeneration.
Main Methods:
- Isolation of EVs via differential centrifugation.
- Characterization using nanoparticle tracking analysis, confocal microscopy, and electron microscopy.
- Manipulation of HA synthesis using lipopolysaccharide, RNA interference, and 4-methylumbelliferone.
Main Results:
- hMSCs exhibit HA-coated filopodia, indicating active HA secretion.
- Secreted EVs are coated with HA and carry mRNAs for CD44 and hyaluronan synthase (HAS) isoforms.
- The HA content of EVs correlates with the HA content of the parent cells.
Conclusions:
- hMSCs possess an intrinsic capacity for HA synthesis and EV secretion.
- HA-coated EVs are a general secretion product of hMSCs.
- HA-coated EVs may play a significant role in HA-mediated tissue regeneration and extracellular matrix remodeling.
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