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CLINICAL OBSERVATIONS, INTERVENTIONS, AND THERAPEUTIC TRIALS
From the Frederick Cancer Research and Development
Center, Biological Response Modifiers Program, National Cancer
Institute, and Clinical Services Program, SAIC Frederick, NCI-FCRDC,
both of Frederick, MD; the Biometric Research Branch and the
Investigational Drug Branch, both of the Cancer Therapy Evaluation
Program, National Cancer Institute, Bethesda, MD; and the Earle A. Chiles Research Institute, Providence Portland Medical Center,
Portland, OR.
We conducted a phase II randomized trial of recombinant
granculocyte-macrophage colony-stimulating factor (GM-CSF) administered before topotecan chemotherapy to determine whether it could prevent myelosuppression and to determine the antitumor activity of this topoisomerase I inhibitor in 53 patients with metastatic malignant melanoma and renal cell cancer. All patients received GM-CSF after topotecan at a dose of 250 µg/m2 daily for at least 8 days. Patients randomly assigned to receive GM-CSF priming were treated
with GM-CSF at 250 µg/m2 twice daily for 5 days before
treatment. Twenty-five patients were randomly assigned to receive
GM-CSF priming and 28 to receive topotecan without priming. The primary
analysis was restricted to the protective effects seen during the first
cycle of therapy. Grade 4 neutropenia occurred in 8 of 23 patients
(35%) and grade 3 neutropenia in 5 of 23 patients (22%) randomized to
GM-CSF priming, whereas 18 of 26 (69%) and 5 of 26 (19%) patients
experienced grade 4 or 3 neutropenia, respectively, without GM-CSF
priming (P = .0074). The mean duration of neutropenia was
reduced by GM-CSF priming: grade 3 neutropenia from 5.2 ± 0.7 to
2.8 ± 0.7 days (P = .0232) and grade 4 neutropenia
from 2.7 ± 0.6 to 1.1 ± 0.4 days (P = 0.0332). The
protective effects of GM-CSF extended to the second cycle of treatment.
The incidence of febrile neutropenia was also reduced.
Chemotherapy-induced anemia and thrombocytopenia were similar in both
groups. One partial response was seen in a patient with melanoma, and
one patient with renal cell cancer had complete regression of pulmonary
metastases and was rendered disease-free by nephrectomy. This article has been cited by other articles:
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| Copyright © 2001 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||