Fig. 3

Cell surface expression of CXCR4 using FCM (n = 3). a–e Representative examples of the membrane expression levels of CXCR4 on MSCs in the different groups. The number of CXCR4-positive cells in the M + UTMB60s group (c) was significantly higher compared with the M group(a) and the M + U60s group (b). There was no significant difference in the number of CXCR4-positive cells between the M + UTMB60s group (c), the M + UTMB90s group (d) and the M + UTMB180s group (e). f Quantification of CXCR4 expression by FCM assay in the experimental MSCs. All values are expressed as the mean ± SD. **P < 0.01; n = 3