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Updated: Jan 4, 2026
Isolation, Characterization, and Therapeutic Application of Extracellular Vesicles from Cultured Human Mesenchymal Stem Cells
Published on: September 23, 2022
Isolation and characterization of microvesicles from mesenchymal stem cells
M Rezaa Mohammadi1, Milad Riazifar2, Egest J Pone2
1Department of Pharmaceutical Sciences, Sue and Bill Gross Stem Cell Research Center, Chao Family Comprehensive Cancer Center, Edwards Life Sciences Center for Advanced Cardiovascular Technology, Department of Biomedical Engineering, and Department of Biological Chemistry, University of California, Irvine, CA 92697, USA; Department of Materials Science and Engineering, University of California, Irvine, CA 92697, USA.
Abstract:
Mesenchymal stem or stromal cells are currently under clinical investigation for multiple diseases. While their mechanism of action is still not fully elucidated, vesicles secreted by MSCs are believed to recapitulate their therapeutic potentials to some extent. Microvesicles (MVs), also called as microparticles or ectosome, are among secreted vesicles that could transfer cytoplasmic cargo, including RNA and proteins, from emitting (source) cells to recipient cells. Given the importance of MVs, we here attempted to establish a method to isolate and characterize MVs secreted from unmodified human bone marrow derived MSCs (referred to as native MSCs, and their microvesicles as Native-MVs) and IFNγ stimulated MSCs (referred to as IFNγ-MSCs, and their microvesicles as IFNγ-MVs). We first describe an ultracentrifugation technique to isolate MVs from the conditioned cell culture media of MSCs. Next, we describe characterization and quality control steps to analyze the protein and RNA content of MVs. Finally, we examined the potential of MVs to exert immunomodulatory effects through induction of regulatory T cells (Tregs). Secretory vesicles from MSCs are promising alternatives for cell therapy with applications in drug delivery, regenerative medicine, and immunotherapy.
Insights
Researchers developed a method to isolate and characterize microvesicles (MVs) from mesenchymal stem cells (MSCs). These MVs show potential for cell-free therapy, including immune modulation and regenerative medicine applications.
Area of Science:
- Biomedical Sciences
- Cell Biology
- Immunology
Background:
- Mesenchymal stem cells (MSCs) are investigated for treating various diseases.
- The therapeutic effects of MSCs are partly attributed to their secreted microvesicles (MVs).
- MVs can transfer functional cargo like RNA and proteins between cells.
Purpose of the Study:
- To establish a method for isolating and characterizing MVs from native and IFNγ-stimulated human bone marrow-derived MSCs.
- To analyze the protein and RNA content of these MVs.
- To evaluate the immunomodulatory potential of MVs, specifically their ability to induce regulatory T cells (Tregs).
Main Methods:
- Ultracentrifugation was used to isolate MVs from MSC-conditioned culture media.
- Characterization and quality control involved analyzing MV protein and RNA content.
- The immunomodulatory capacity of MVs was assessed by their effect on Treg induction.
Main Results:
- A reproducible method for MV isolation and characterization from MSCs was successfully established.
- Analysis confirmed the presence of protein and RNA cargo within the isolated MVs.
- Both native and IFNγ-stimulated MSC-derived MVs demonstrated potential in inducing regulatory T cells.
Conclusions:
- Microvesicles derived from MSCs are promising cell-free therapeutic agents.
- These MVs hold potential for applications in drug delivery, regenerative medicine, and immunotherapy.
- The established isolation and characterization methods provide a foundation for further research into MSC-derived MVs.
