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We conducted a prospective randomized clinical trial to assess the mobilizing efficacy of filgrastim, lenograstim and molgramostim following a disease-specific chemotherapy regimen. Mobilization consisted of high-dose cyclophosphamide in 45 cases (44%), and cisplatin/ifosfamide/etoposide or vinblastine in 22 (21%), followed by randomization to either filgrastim or lenograstim or molgramostim at 5 microg/kg/day. One hundred and three patients were randomized, and 82 (79%) performed apheresis. Forty-four (43%) patients were chemonaive, whereas 59 (57%) were pretreated. A median number of one apheresis per patient (range, 1-3) was performed. The median number of CD34+ cells obtained after mobilization was 8.4 x 10(6)/kg in the filgrastim arm versus 5.8 x 10(6)/kg in the lenograstim arm versus 4.0 x 10(6)/kg in the molgramostim arm (P=0.1). A statistically significant difference was observed for the median number of days of growth factor administration in favor of lenograstim (12 days) versus filgrastim (13 days) and molgramostim (14 days) (P

The aim of the study was to evaluate peripheral blood progenitor cell mobilization by disease-specific chemotherapy in heavily pretreated patients with germ cell tumor (GCT), scheduled for high-dose chemotherapy. Thirty-four consecutive patients, 29 males and five females, with advanced GCT referred to our department for high-dose chemotherapy were evaluated retrospectively. Sixteen patients were mobilized by vinblastine 0.11 mg/kg on days 1 and 2, ifosfamide 1200 mg/m2 days 1-5 and cisplatin 20 mg/m2 days 1-5 (VeIP). In 10 patients, etoposide 75 mg/m2 days 1-5 was used instead of vinblastine (VIP), while in eight patients the mobilization was attempted by administering 7 g/m2 of cyclophosphamide. The choice of either etoposide or vinblastine was predicated upon which of these two drugs was associated with best results during premobilization chemotherapy. Cyclophosphamide was selected in patients refractory to previous cisplatin-based salvage chemotherapy. Twenty-five out of 34 patients underwent a successful PBPC collection. In 17 of them one leukapheresis procedure was sufficient to collect the target number of CD34+ cells, while in eight patients a double procedure was necessary. Altogether 33 aphereses were performed in 25 patients. In nine patients leukapheresis was not attempted. This was due to the fact that the chemotherapy failed to mobilize the target number of CD34+ cells in eight of them, treated with the VeIP mobilizing regimen, while one patient treated with high-dose cyclophosphamide rapidly progressed during therapy and for this reason leukapheresis was not undertaken. In conclusion, in heavily pretreated patients with GCT, PBPC mobilization is feasible by a further course of salvage chemotherapy. The choice of either etoposide (VIP) or vinblastine (VeIP) can be predicated upon which of these two drugs was associated with best results during premobilization chemotherapy. In our hands, VeIP seems to be less satisfactory as mobilizing treatment than VIP, possibly due to a superior number of premobilization courses of chemo therapy in some patients. Moreover, high-dose cyclophosphamide remains a good alternative for mobilizing patients refractory to salvage chemotherapy.

A pilot study was conducted in which 15 patients with small cell lung cancer (SCLC) with limited or extended disease were treated with high dose etoposide (600 mg/m2 daily for 3 consecutive days) followed by autologous bone marrow transplantation (ABMT). Twelve patients underwent a double graft. All had achieved complete or partial remission with conventional induction chemotherapy (adriamycin and etoposide, plus cisplatin in five cases). After ABMT six of the 15 patients did not receive radiotherapy to the chest; all but four patients received prophylactic brain irradiation. No toxic deaths were recorded during the period of aplasia. Eleven patients relapsed and died after ABMT. The median time to death was 18 months. One other patient died at 13 months of unknown cause. At the present time three patients are alive and free of disease at 54, 51 and 47 months respectively. This pilot study shows that high dose etoposide and ABMT is well tolerated as late intensification for responsive SCLC. Definite conclusions about its precise role in therapy cannot yet be drawn.