Surface marker expression of human MSCs. FACS analysis of the immunophenotypic surface profile for CD11b, CD19, CD34, CD45, CD73, CD90, CD105 and HLA-DR of isolated hMSCs. Red histograms represent the fluorescence from negative-control cells incubated with only secondary antibody; black histograms represent the counts of cells incubated with the relevant primary antibody. The logarithm on the X-axis (FL1-H channel) represents the intensity of the fluorescent signal and the number of cells is given on the Y-axis. HMSCs isolated in this study were positive for the markers CD73, CD90 and CD105, but negative for CD11b, CD19, CD34, CD45 and HLA-DR according to the criteria for MSCs.