[Clinical study on high-dose etoposide with granulocyte colony-stimulating factor for mobilization of autologous peripheral blood stem cells in patients with hematologic malignancies].

OBJECTIVE: To explore the effectivity and safety of single high-dose (HD) etoposide (Vp16) with granulocyte colony-stimulating factor (G-CSF) for mobilization of autologous peripheral blood stem cells (PBSC) in patients with hematologic malignancies.

METHODS: 80 patients of hematologic malignancies including 20 patients with acute leukemia (AL), 23 with multiple myeloma (MM), 35 with non-Hodgkin's lymphoma (NHL) and 2 with Hodgkin's lymphoma (HL) received Vp16 (1.6 g/m(2)) continuous intravenous infusion for 10 hrs on day 1. G-CSF at 10 µg/kg once daily subcutaneous injection began to use on day of ANC lower than 1×10(9)/L and continued until PBSC collection was completed. Autologous PBSC (APBSC) was collected on day of WBC greater than 5×10(9)/L and continuing until the collection goal was met (target value: MNC ≥ 6.0×10(8)/kg and CD34(+) ≥ 2.0×10(6)/kg). The patients received APBSC after conditioning regimen. The number of the cells collection, time of hematopoietic reconstruction, adverse effect and so on were observed during the course of stem cell mobilization and collection.

RESULTS: PBSC was collected on day 11 (range: 7 - 25 days) of after Vp16 administration with a median collection time of 2 (range 1 - 5). 3/80 patients with AML got stem cell mobilization failure. 5 of 6 patients who failed to mobilize before got successful stem cell mobilization, 1/6 patient with AML-M(5) got a second failure after the mobilization of VP16 whose first time's mobilization using Ara-C did not succeed. The median number of CD34(+) cells collected in 77 patients who got successful mobilization was 4×10(6)/kg \[range (1.59 - 24.68)×10(6)/kg\]. The collection of 20 patients with AL and 23 with MM were got detection for minimal residual disease, no pollution of tumor cells were happened. All patients could tolerate the whole course of stem cell mobilization. 29/80 (36.25%) patients got a 4 grade leucopenia, 19/80 (23.75%) patients got infection.

CONCLUSION: Single high-dose etoposide with G-CSF for mobilization of APBSC has a higher achievement ratio, a controllable adverse effect, a promising hematopoiesis recovery, which is an effective and safe mobilizing regimen for patients with hematologic malignancies.