Figure 9.
CD11c+ peripheral blood DCs respond to MIP-3β but not to MIP-3α upon spontaneous maturation. CD11c+ DCs were FACS® sorted from PBLs according to their lack of lineage markers and expression of CD4 and CD11c (see Materials and Methods). (A) The responses to MIP-3α (500 ng/ml) and to MIP-3β (500 ng/ml) were determined after FACS® sorting and after 16-h culture with GM-CSF. Migration assays were performed in Boyden microchambers. Results are expressed as number of migrating cells per two low power fields (original magnification: ×20). Results are representative of four experiments. (B) The expression of CCR7 mRNA was assessed by semiquantitative RT-PCR. Results at 35 cycles are shown, and PCR for β actin is shown at 21 cycles as an internal mRNA control. Results are representative of three experiments.