(A) Complete blood count analysis of radiation alone controls (Rad Ctrl), and aplastic anemia mice treated with PGDHi, vehicle (Veh) control, PGDHi + 10mg/kg cyclosporine (CsA), and Veh + CsA, 13 days post-induction. Panels represent total white blood cells (WBC), neutrophils (NE), platelets (PLT), and red blood cells (RBCs). N= 11-12 experimental mice/group. (B) Representative hematoxylin and eosin-stained sections from the hindlimbs of Rad Ctrl and aplastic anemia mice treated as indicated, 14 days post-induction. (C-D) Quantification of bone marrow (BM) cellularity and absolute number of BM Lin− c-Kit+ -defined hematopoietic stem and progenitor cells (HSPCs) perhindlimb, 14 days post-induction. N=10-11 experimental mice/group. * P < 0.05 for the comparison of either mono- or dual-PGDHi therapy versus vehicle-treated counterpart by student’s t-test; ψ P < 0.05 by one-way ANOVA with Tukey multiple comparisons post-test.