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Background: Dental Pulp Stem Cells (DPSCs) are multipotent mesenchymal stem cells. DPSCs can renew themselves and differentiate into various cell types such as adipocytes, osteocytes, neurons, etc. DPSCs possess immunomodulatory properties and can inhibit peripheral blood mononuclear cell (PBMC) proliferation. Recent studies showed that conditioned-medium mesenchymal stem cells also had immunosuppressive activity. The ability of DPSC conditioned medium to suppress proliferation of allogeneic PBMC determined using BrdU (5-bromo-2’-deoxyuridine) proliferation assay. Materials and Methods: Dental pulp stem cells were extracted from a wisdom tooth. These cells are characterized for differentiation potential to adipogenic and osteogenic lineage and expression of mesenchymal stem cells markers, including CD105, CD73, CD90, CD14, CD-34, and CD45. The characterized DPSCs were cultured, and the conditioned medium (CM) got isolated. Stimulated and non-stimulated PBMCs from the allogeneic donor were cultured with DPSC-CM for 24, 48, and 72 hours. The proliferation of PBMCs was measured with BrdU assay. Results: The BrdU test results showed that DPSC-CM reduced allogeneic PBMC proliferation at different time points. DPSC-CM could inhibit stimulated and non-stimulated PBMC in 48 and 72 hours after incubation.Conclusion: This study demonstrated that DPSC-CM had an immunomodulatory effect on the proliferation of allogeneic cells.

The Effects of Dental Pulp Stem Cell Conditioned Media on the Proliferation of Peripheral Blood Mononuclear Cells