Pegylated recombinant human granulocyte colony stimulating factor(CSPC Pharmaceutical Group Ltd.)

To compare the efficacy and safety of pegylated recombinant human granulocyte colony-stimulating factor (PEG-rhG-CSF) and rhG-CSF in the recovery of neutrophils after induction therapy in ALL patients, PEG-rhG-CSF was injected subcutaneously within 24 ~ 48 h after the end of intravenous infusion of daunorubicin/idarubicin during induction chemotherapy. In rhG-CSF group, patients were given rhG-CSF. The main outcome indexes were the incidence and duration of grade 4 chemotherapy-induced-neutropenia (CIN, ANC less than 0.5 × 10⁹/L), the incidence of severe agranulocytosis (ANC less than 0.2 × 10⁹/L). The incidence of grade 4 CIN in the PEG-rhG-CSF group was significantly lower than that in the rhG-CSF group (P = 0.007). There was no significant difference in the incidence of severe neutrophil deficiency and the median time of neutrophil deficiency in PEG-rhG-CSF group and rhG-CSF group. There was no significant difference in day 28 complete response (CR) rate of bone marrow cytology between the two groups (P = 0.985). Compared with rhG-CSF, PEG-rhG-CSF can reduce the incidence of agranulocytosis after induction chemotherapy in newly diagnosed ALL patients, without affecting the efficacy of chemotherapy. Meanwhile, it can reduce the pain of patients, with good safety and tolerance.

The high mobilization failure rate with the mobilization strategy of combining chemotherapy and filgrastim (rhG-CSF) in autologous hematopoietic stem cell transplantation (auto-HSCT) in lymphomas is one of the unresolved issues. Whether the combination of polyethylene glycol filgrastim [pegfilgrastim (PEG-FIL), PEG-rhG-CSF] and filgrastim (FIL) improves the mobilization success rate and the timing of combination therapy has not been studied.

107 lymphoma patients who received auto-HSCT were retrospectively enrolled and divided into groups of PEG+FIL and FIL. The group of PEG+FIL received pegfilgrastim (9 mg) on the third day of the chemotherapy, followed by filgrastim (10 μg/kg/day) based on the counts of peripheral blood stem cells (PBSC). The group of FIL received filgrastim 10 μg /kg/day depending on the number of PBSCs.

The incidence of neutropenic fever in the group of PEG+FIL was significantly lower than in the group of FIL. The mean recovery time of leukocytes at autologous stem cell transplantation was significantly shorter in the group of PEG+FIL than in the group of FIL. Compared to the groups of FIL, the group of PEG+FIL had lower hospitalization costs. We found that the combination therapy is more recommended for patients with a bone marrow hematopoietic area of less than 30 %. Filgrastim is best administered 5-6 days after pegfilgrastim administration.

Compared to conventional filgrastim mobilization, the combination of pegfilgrastim and filgrastim schedule has high efficacy, non-inferior safety, and superior health economic benefits during auto-HSCT.