Figure 3: Magnetic field attraction in vitro and in vivo. (a) Clear accumulation of SPION-labeled ADSCs at the edge of the magnet that was placed under the dish at the center for 24 h. The rectangular region is enlarged in (b); scale bar = 20 μm. (c) Schematic for cell delivery and magnetic forces. Images show EdU+ ADSCs in the corpus cavernosum with (e) or without (d) magnetic field application. Bar graph presents the numbers of cells homed to the corpus cavernosum. *P < 0.05 compared with ADSCs; ADSCs: ADSC-treated group; M-ADSCs: magnetic-targeted group.