Traitements immunosuppresseurs : mécanismes d’action et utilisation clinique

Elucidating the role of cell-mediated inflammatory cytokines on allogeneic mouse-derived nucleus pulposus mesenchymal stem cells

In this present study, our aim was to evaluate the cell-mediated specific anti-donor antibody and its associated inflammatory cytokine secretion along with its succeeding effects on Nucleus pulposus-derived mesenchymal stem cells (NPMSCs). Tissue from the NP compartment of 12 normal mice was isolated, expanded in cell culture, and the cell phenotypes were confirmed by flow cytometry. Multipotent differentiation and its specific gene expression analysis were confirmed by reverse transcriptase PCR. T and B cells were monitored for both donor and recipient mouse and further analysis of anti-donor antibody secretion was confirmed by lymphocyte crossmatch. In conjunction with anti-donor-specific antibody analysis, the associated inflammatory cytokine expression was analyzed by ELISA. In co-culture, cell-mediated antibody secretion was elevated in T and B cells positive mouse group, when compared to control mouse group. Allogeneic-derived donor NPMSCs were found to be stimulated the secretion of pro-inflammatory cytokines and the level of pro-inflammatory cytokines showed reduced expression in control mouse serum. In co-culture group the concentration of the cell-mediated pro- and anti-inflammatory cytokines found to be increased. PRACTICAL APPLICATIONS: Mesenchymal stem cell exhibit good regeneration capacity for many types of disease, and the mechanism belongs to regeneration is not clear. In intervertebral disc, the nucleus pulposus-derived mesenchymal stem cells showed a better regeneration capacity. On the contrary, the NP cells-based therapy, the Mesenchymal stem cells showed expanded anabolic and reduced catabolic activity together with induced anti-inflammatory effect. In this study, the T & B cells were used to evaluate the anti-donor antibody secretion and also to study how it stimulates the production of anti-donor antibodies against the donor cells. Finally, it was found that T & B cells lead the synthesis of inflammatory cytokines are IL-1, IL-6, and TNF-α. From this study, the results proved that the cell-mediated pro- and anti-inflammatory cytokines to be monitored in allogeneic stem cells-based therapy of intervertebral disc degeneration.