Fig. 4.
Effect of IL-5 on HSPC migration.
(A) Enriched populations of HSPCs were isolated from WT and IL-5trg mice. WT cells were incubated in media containing the cytokine cocktail (Flt-3 ligand, SCF, IL-6, IL-3, IL-11, thrombopoietin [Tpo]) with or without (control) IL-5. Cells were allowed to migrate toward SDF-1 across an endothelial monolayer for 4 hours. The number of migrated cells was calculated and expressed as a percentage of total cell number. (B) Migrated HSPCs were plated into methylcellulose cultures in the presence of the cytokine cocktail (IL-3, IL-6, SCF, Tpo). The numbers of colonies (n = 4 cultures per group) were counted, recalculated, and expressed as percentage of total migrated CFC mean ± SD.