Undergraduate student Claremont McKenna College Claremont, California, United States
Introduction/Rationale: Existing treatments for autoimmune diseases, such as Multiple Sclerosis (MS), often lead to broad immunosuppression, raising concerns about opportunistic infections. A more targeted approach could involve mesenchymal stem cell (MSC)-derived exosomes, which exhibit immunomodulatory properties by transferring miRNAs, proteins, and other bioactive molecules. These exosomes can specifically target T helper 17 (Th17) cells, influencing crucial downstream T-cell signaling pathways such as activation, proliferation, and survival. Using MSC-derived exosome media can effectively suppress the release of pro-inflammatory cytokines from Th17 cells.
Methods: T-cell proliferation and survival were assessed by flow cytometry using CFSE labeling and Annexin V staining. The expression levels of pro-inflammatory and anti-inflammatory cytokines were quantified by RT-qPCR.
Results: Modulation with MSC-derived exosomes enhanced the expression of anti-inflammatory cytokines while reducing the expression of pro-inflammatory cytokines.
Conclusion: Targeted inhibition of Th17 cell activation may alleviate central nervous system inflammation. Focusing on the regulatory effects of MSC-derived exosomes on T cells could enable the development of more precise immunotherapies that modulate immune responses without broadly suppressing immune function.
