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Cyclophosphamide, Doxorubicin, Vincristine, Prednisone Dose Intensification With Granulocyte Colony-Stimulating Factor Markedly Depletes Stem Cell Reserve for Autologous Bone Marrow Transplantation
Arnold Freedman,
Donna Neuberg,
Peter Mauch,
John Gribben,
Robert Soiffer,
Kenneth Anderson,
Michael Robertson,
David C. Fisher,
Robert Schlossman,
Mary Kroon,
Catherine Rhuda,
Caroline Kuhlman,
Jerome Ritz, and
Lee Nadler
From the Division of Hematologic Malignancies and Biostatistics, Dana-Farber Cancer Institute, Boston, MA; the Department of Radiation Therapy, Brigham and Women's Hospital, Boston, MA; and the Departments of Medicine and Radiation Oncology, Harvard Medical School, Boston, MA.
Hematopoietic growth factors allow dose escalation of chemotherapy. This approach may potentially reduce the quality and quantity of hematopoietic stem cells. The capacity of stem cells recovered after dose intensification to support myeloablative therapy is unknown. In patients with previously untreated advanced follicular lymphoma, trilineage hematopoietic engraftment was compared in two sequential trials of induction therapy (standard dose cyclophosphamide, doxorubicin, vincristine, prednisone [CHOP] without growth factors or dose intensification CHOP supported by granulocyte colony-stimulating factor [G-CSF ]) followed by identical myeloablative therapy and autologous stem cell support. Neutrophil, platelet, and red blood cell (RBC) engraftment were compared on days 100, 180, and 360 after stem cell reinfusion. Despite similar patient characteristics including reinfusion of comparable numbers of marrow mononuclear cells, after stem cell transplantation, a highly significant prolongation of neutrophil and platelet engraftment was seen in patients who received high dose CHOP and G-CSF in comparison to standard dose CHOP. These findings suggest that dose intensified chemotherapy and G-CSF recruited stem cells into a proliferative phase and that G-CSF allowed retreatment at a time when stem cells were susceptible to damage by cytotoxic therapy. Such inadequate hematologic engraftment after myeloablative therapy might be avoided by either shortening the time that growth factor support is administered, lengthening the interval between cycles, or attempting to repetitively harvest additional stem cells either from the marrow or peripheral blood. Therefore, intensification of chemotherapy with growth factor support must be used with caution if stem cells are to be used to support myeloablative therapy.
Blood, Vol. 90 No. 12 (December 15), 1997:
pp. 4996-5001
© 1997 by The American Society of Hematology.
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