Journal of Clinical Oncology, Vol 15, 660-666, Copyright © 1997 by American Society of Clinical Oncology

ARTICLES

Prospective randomized placebo-controlled study of granulocyte- macrophage colony-stimulating factor without stem-cell transplantation after high-dose melphalan in patients with multiple myeloma

P Moreau, D Fiere, WR Bezwoda, T Facon, M Attal, JP Laporte, P Colombat, HL Haak, M Monconduit, H Lockhorst, D Girault and JL Harousseau
Department of Hematology, Centre Hospitalier Universitaire (CHU) Hotel- Dieu, Nantes, France.

PURPOSE: To evaluate the impact of granulocyte-macrophage colony- stimulating factor (GM-CSF) or placebo on the durations of intravenous (IV) antibiotic use, hospitalization, neutropenia, and fever, as well as remission rates, after high-dose melphalan (HDM) without stem-cell transplantation (SCT) in patients with multiple myeloma (MM). PATIENTS AND METHODS: One hundred two patients with high-risk MM were randomized 2:1 in a prospective multicenter trial to receive 5 microg/kg/d GM-CSF (69 patients) or placebo (33 patients) starting the day after 140 mg/m2 IV melphalan for up to 21 days. RESULTS: GM-CSF significantly reduced neutropenia after HDM (median, 23.5 v 29 days; P = .0468), with a trend to reduce the duration of hospitalization (median, 32 v 38 days; P = .0841). Nevertheless, GM-CSF did not significantly reduce infectious toxicity as regards the number of days with fever (median, 5 v 3; P = .359), the number of days with IV antibiotics (median, 22 v 27; P = .14), or early deaths, with an 11.5% treatment-related mortality rate in the GM-CSF group (eight of 69 v two of 32 patients in the placebo group; P = .686). There was no difference in response rates between the two groups of patients. CONCLUSION: GM-CSF after HDM without SCT is feasible and significantly shortens neutropenia with a trend toward reduction of hospitalization duration, but does not significantly reduce the morbidity and mortality of such therapy. Thus, when intensive therapy is indicated, given that the mortality of HDM followed by SCT reported in the literature is less than 5% and patients are discharged at approximately day 15, despite the risk of contamination by clonogenic malignant cells, SCT appears to be preferable to GM-CSF after HDM.

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