Figure 7. Melatonin promotes the formation of CFU. The number of CFUs was scored after melatonin (100 nM) or TPO (positive control, 50 ng/mL) treatments for seven days (n=6). (A) Bone marrow histology of Giemsa staining. (B) Statistic analysis of CFUs. Two-way ANOVA (with a Tukey multiple comparison test) was employed to test for significance (n=6). ** p< 0.01. CFU-MK, colony- forming unit-megakaryocyte; CFU-GM, colony-forming unit-granulocyte macrophage; BFU/CFU-E, burst-forming unit/colony-forming unit-erythroid; CFU-GEMM, colony-forming unit-mixed.