Anna Hitz, Michele A Lykos, Darbepoetin alfa has a
longer circulating half-life and greater in vivo potency than recombinant human erythropoietin, Experimental Hematology, Volume 31, Issue 4, April 2003, Pages 290-299,
Figure 6. Darbepoetin alfa can be administered less frequently than rHuEPO. (A) Groups of CD-1 mice were injected IP with 7.5 μg of peptide/kg/dose of darbepoetin alfa QW [один раз в неделю], 2.5 μg of peptide/kg/dose of rHuEPO TIW [3 раза в неделю], or vehicle control TIW, for 38 days. There were 8 mice/group for darbepoetin alfa, 10 mice/group for rHuEPO, and 6 mice/group for the vehicle control.(B) Groups of CD-1 mice were injected IV with varying dose levels of darbepoetin alfa once every other week (EOW), or with 100 μg/kg of rHuEPO QW or vehicle control QW for 39 days. Dose levels (μg of peptide/kg) are indicated both as the dose per administration and as the equivalent dose per week. There were 10 mice in each group. For both A and B, hematocrit determinations were performed at baseline and twice weekly thereafter. Data are from a representative experiment and are the group mean change in hematocrit (± SD).