AsIII suppresses the expression of GATA-2-regulated genes. Primary mouse bone marrow HPCs stimulated with EPO and SCF to undergo erythroid lineage commitment and differentiation were treated in vitro with 0 or 500 nM AsIII for 48 h and the expression of GATA-2-responsive genes was measured using qPCR. Relative expression of GATA-2-regulated genes (normalized to Gapdh) (A) Gata-2, (B) Gata-1, (C) Pbx1, (D) Rhag1, (E) Runx1, (F) Cd34, (G) Bmp4, (H) Klf1, (I) Tal1. Data are expressed as mean ± SD. Statistically significant differences compared to untreated control in in Student’s t-test compared to untreated control (n = 3/group; *p < 0.05, **p < 0.01).