Evaluation of immunomodulatory effects of co-culture or supernatant of dexamethasone or IFN-γ-treated adipose-derived mesenchymal stem cells on spleen mononuclear cells.

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Although mesenchymal stem cells (MSCs) have exhibited promising immunomodulatory potential in preclinical studies, clinical studies have revealed variable results. These results often depend on environmental cues. Pre-conditioning MSCs with cytokines is one of the methods used to enhance their immunomodulatory effects. In this study, we harvested adipose-derived MSCs from mice and cultured them with different doses of the cytokine, IFN-γ, and the corticosteroid drug, dexamethasone, in order to investigate their effects on MSC immunosuppressive function. We found the co-culture or supernatant of MSCs, pre-conditioned with IFN-γ, together with spleen mononuclear cells resulted in a significant reduction of mononuclear cell proliferation. Although the supernatant of MSCs, pre-conditioned with dexamethasone, showed similar results, dexamethasone pre-conditioning of co-cultured MSCs increased mononuclear cell proliferation. The results further our understanding of immune-related effects of MSCs which may provide a basis for further in vivo studies to achieve better clinical results. We propose that pre-conditioning with cytokines might be an effective method to boost the immunomodulatory effects of MSCs.

Evidence level

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

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