Randomized phase III trial of pegfilgrastim versus filgrastim after autologus peripheral blood stem cell transplantation

Aaron Gerds, Mary Fox-Geiman, Kevin Dawravoo, Tulio Rodriguez, Amir Toor, Scott Smith, Karen Kiley, Donna Fletcher-Gonzalez, Chindo Hicks, Patrick Stiff
Biology of Blood and Marrow Transplantation 2010, 16 (5): 678-85
Nonrandomized trials suggest that pegfilgrastim, a pegylated granulocyte colony-stimulating factor, could be used in lieu of filgrastim after autologus peripheral blood stem cell transplantation. This phase III, randomized, double-blinded, placebo-controlled trial compared the efficacy, costs, and safety of single-dose pegfilgrastim (single 6 mg dose) versus daily filgrastim (5 microg/kg/day) for this indication. Seventy-eight patients, matched for age, sex, underlying disease, stage, and CD34/kg transplant dose were enrolled. Cytokines were started on day +1 posttransplant and continued to an absolute neutrophil count (ANC) of 5x10(9)/L for 3 days or 10x10(9)/L for 1 day. The median time to neutrophil engraftment (ANC >1.5x10(9)/L for 3 days or 5x10(9)/L for 1 day) was the same in both groups (12 days). No differences in platelet engraftment (11 versus 13 days), number of platelet transfusions (5 versus 4), percent with positive cultures for bacterial pathogens (23% versus 15%), days of fever (1 versus 2), deaths prior to engraftment (1 versus 1), or duration of hospital stay (19 versus 19 days) were seen between the pegfilgrastim and filgrastim groups, respectively. Using the average wholesale price for doses used in this trial, there was a per-patient savings of $961 for the pegfilgrastim group (P < .001). This phase III study failed to demonstrate a difference in time to neutrophil engraftment or any clinical sequelae between pegfilgrastim and filgrastim when given post-APBSCT, with pegfilgrastim achieving a cost savings over filgrastim.

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