Equine mesenchymal stromal cells and embryo-derived stem cells are immune privileged in vitro.
- Journal Article
- Research Support
- Non-U.S. Gov't
- Comment
Summary
The research article investigates the immune-privileged properties of equine mesenchymal stem cells and embryo-derived stem cells, and their potential application in regenerative medicine.
Understanding the Research
The research paper focuses on the study of certain types of stem cells derived from horses, more specifically, mesenchymal stem cells (MSCs) and embryo-derived stem cells (ESCs).
- The study begins by noting that these types of autologous cells (cells derived from the same individual undergoing therapy) are potentially beneficial for regenerative medicine but their functioning is not completely understood.
- Historically, these cells have been seen to not elicit an immune response when injected into the tendon of a horse. Hence, the researchers assume that these cells have properties that make them immune-privileged.
- The researchers aim to understand if these properties could be beneficial for therapeutic purposes in other tissues as well.
Methodology
Various experiments were conducted using these cells to understand their properties.
- The MSCs, ESCs, and differentiated ESCs (dESCs) were treated with Mitomycin C and cultured with equine peripheral blood mononuclear cells (PBMCs).
- The effect of these cells on PBMC proliferation (growth and multiplication) was observed both in the presence and absence of a certain protein called interferon-gamma (IFN-γ).
- Additionally, co-culture of MSCs and PBMCs was performed directly or indirectly in transwells, and then the proliferation of PBMCs was examined.
- Apart from these, the media or the solution in which these cells were grown was also studied for various cytokines—a type of protein that could play a key role in cell signaling.
Results
From these experiments, several key findings were observed.
- The co-culture of PBMCs with ESCs or dESCs did not influence the baseline proliferation, whereas, in the presence of MSCs, baseline proliferation was significantly reduced.
- The proliferation of PBMCs in the presence of super-antigens was also observed to be suppressed when co-cultured with MSCs. This suppression was seen to be greater when there was direct contact. However, considerable suppression was also observed in transwell culture and using MSC-conditioned media, indicating that soluble factors may have played a role in the immune-suppression carried out by MSCs.
- It was also noted that the MSCs constantly secrete interleukin-6 (IL-6), regardless of whether they are being co-cultured with PBMCs or not.
- Moreover, the media conditioned with MSCs led to a significant reduction in the expression of IL-6, IFN-γ, and TNF-α in the PBMCs stimulated by super-antigens.
Conclusions
In conclusion, the researchers noted that MSCs and ESCs in horses display a certain level of innate immune privilege. They also found that MSCs secrete certain soluble factors that can suppress PBMC proliferation and change cytokine expression. The authors suggest that these properties may lead to the future clinical use of allogeneic (donor-derived) stem cells, thereby expanding the scope and standardization of treatments for tissue injuries.
Cite This Article
Publication
Researcher Affiliations
MeSH Terms
- Animals
- Horse Diseases / therapy
- Mesoderm / cytology
- Stem Cell Transplantation / veterinary
- Stem Cells / cytology
- Tendon Injuries / veterinary
- Tendons / cytology
References
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Citations
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