Chemotactic properties of MSC cultures. (A) Migration of MSCs in response to SDF-1. Results shown are from a representative experiment and are expressed as the average number of migrated cells in 5 fields examined. Each sample was run in duplicate. (B) Migration of MSCs and the prostate line PC3 to bone marrow, expressed as a percentage of PC3 migration. (C) Migration of MSCs to bone marrow in the presence of anti-CXCR4 (expressed as % of migration to bone marrow). All data shown are expressed as mean ± SEM.