Fig. 4

T-cell proliferation assays. Assays were performed using carboxyfluorescein succinimidyl ester (CFSE)-labelled human peripheral blood mononuclear cells (PBMC) activated with phytohaemagglutinin and co-cultured with or without human dental pulp mesenchymal stromal cells (MSC) for 5 days. a Representative histograms from dental pulp MSC cytometry analysis are shown (n = 3). b Histograms showing number of CFSE-labelled activated cells. c Histograms showing percentage proliferation of CFSE-labelled CD8+ T cells. n = 3; *p < 0.05. sh short hairpin