Figure 1.

A: CXCL12-treated group. The number of invading PC3 cells was higher than that found in the other two groups. H&E, 100×. B: Untreated control group. Some PC3 cells migrated through the ECM gel to the lower layer. H&E, 100×. C: AMD3100-treated group. The number of invading PC3 cells was much lower than that found in the other two groups. H&E, 100×.