A phase I trial of recombinant human interleukin-11 (neumega rhIL-11 growth factor) in women with breast cancer receiving chemotherapy.

We performed a phase I trial of recombinant human interleukin-11 (rhIL-11) in women with breast cancer. Cohorts of three to five women were accrued to five dosage levels of rhIL-11 (10, 25, 50, 75, and 100 micrograms/kg/d). rhIL-11 alone was administered by a daily subcutaneous injection for 14 days during a 28-day prechemotherapy "cycle 0." Patients (pts) subsequently received up to four 28-day cycles of cyclophosphamide (1,500 mg/m2) and doxorubicin (60 mg/m2) chemotherapy followed by rhIL-11 at their assigned dose (days 3 through 14). Sixteen pts (13 stage IV, 3 stage IIIB) were accrued to this study. Median age was 53 years and median Eastern Cooperative Oncology Group Performance Status was 0. A grade 3 neurologic event was seen in 1 pt at 100 micrograms/kg. Because of the degree of grade 2 constitutional symptoms (myalgias/arthralgias and fatigue) at 75 micrograms/kg, dose escalation was stopped and 75 micrograms/kg was the maximally tolerated dose. No other grade 3 or 4 adverse events related to rhIL-11 were seen. The administration of rhIL-11 was not associated with fever. Reversible grade 2 fatigue and myalgias/arthralgias were seen in all pts at 75 micrograms/kg. Weight gain of 3% to 5% associated with edema was seen at doses > 10 micrograms/kg but a capillary leak syndrome was not seen. rhIL-11 alone was associated with a mean 76%, 93%, 108%, and 185% increase in platelet counts at doses of 10, 25, 50, and 75 micrograms/kg, respectively. No significant changes in leukocytes were seen. A mean 19% decrease in hematocrit was observed. Acute-phase proteins increased with treatment at all doses. Compared with patients at the 10 micrograms/kg dose, patients receiving doses > or = 25 micrograms/kg experienced less thrombocytopenia in the first two cycles of chemotherapy. We conclude that rhIL-11 has thrombopoietic activity at all doses studied, is well tolerated at doses of 10, 25, and 50 micrograms/kg, and at doses > or = 25 micrograms/kg has the potential to reduce chemotherapy-induced thrombocytopenia in this model.

Surgical salvage of chemorefractory germ cell tumors.

PURPOSE: Patients with disseminated germ cell tumors who relapse after salvage chemotherapy, or who progress during cisplatin-based therapy, have chemorefractory disease and a very poor prognosis. A subset of these patients will have chemorefractory but resectable disease. We have therefore evaluated the role of salvage surgery in this patient population. PATIENTS AND METHODS: We performed a retrospective review of all patients with disseminated germ cell tumors who were felt to have chemorefractory disease and underwent salvage surgery from 1977 to 1990 at Indiana University. All patients had elevated serum markers or other signs of progressive carcinoma. A total of 48 patients underwent surgery (33 retroperitoneal lymph node dissections [RPLNDs], six thoracotomies, three thoracoabdominal resections, and multiple asynchronous procedures in six patients). RESULTS: Thirty-eight of 48 patients (79%) were rendered grossly free of disease and 29 (60%) obtained a serologic remission. Ten patients (21%) remain continuously disease-free with no postoperative treatment with a median follow-up of 46 months (range, 31 to 89). Six additional patients who relapsed after salvage surgery are currently disease-free with further treatment (four with repeat surgery and two with high-dose chemotherapy and autologous bone marrow transplantation [ABMT]). CONCLUSION: Selected patients with chemorefractory but resectable germ cell tumors have definite potential for cure with salvage surgery.

Secondary leukemia associated with a conventional dose of etoposide: review of serial germ cell tumor protocols.

BACKGROUND: Case reports have suggested that treatment with high-dose etoposide can result in development of a unique secondary leukemia. PURPOSE: This study was designed to estimate the risk of developing leukemia for patients receiving conventional doses of etoposide along with cisplatin and bleomycin. METHODS: We reviewed the records at Indiana University of all untreated patients entering clinical trials using etoposide at conventional doses (cumulative dose, 2000 mg/m2 or less) for germ cell cancer between 1982 and 1991. The records of all patients who received a chemotherapy regimen containing etoposide, ifosfamide, or cisplatin after failing to respond to primary chemotherapy were also reviewed. RESULTS: Between 1982 and 1991, 538 patients entered serial clinical trials with planned cumulative etoposide doses of 1500-2000 mg/m2 in combination with cisplatin plus either ifosfamide or bleomycin. Of these 538 patients, 348 received an etoposide combination as initial chemotherapy and 190 received etoposide as part of salvage treatment. To date, 315 patients are alive, with median follow-up of 4.9 years, and 337 patients have had follow-up beyond 2 years. Two patients (0.37%) developed leukemia. One developed acute undifferentiated leukemia with a t(4;11) (q21;q23) cytogenetic abnormality 2.0 years after starting etoposide-based therapy, and one developed acute myelomonoblastic leukemia with no chromosome abnormalities 2.3 years after beginning chemotherapy. During this period, several hundred patients were treated with etoposide-based chemotherapy and did not enter clinical trials. Three of these patients are known to have developed hematologic abnormalities, including one patient with acute monoblastic leukemia with a t(11;19)(q13;p13) abnormality. CONCLUSIONS: Secondary leukemia after treatment with a conventional dose of etoposide does occur, but the low incidence does not alter the risk-to-benefit ratio of etoposide-based chemotherapy in germ cell cancer. IMPLICATIONS: The reports of leukemia associated with high doses of etoposide emphasize the need for diligent follow-up of patients and make careful risk-to-benefit analysis imperative.