Abstract:
:We conducted a prospective randomized trial to evaluate the ability of the interleukin-3/granulocyte-macrophage colony-stimulating factor (GM-CSF) fusion protein, PIXY321, to ameliorate cumulative thrombocytopenia after multiple cycles of 5-fluorouracil, leucovorin, doxorubicin, cyclophosphamide (FLAC) chemotherapy compared with GM-CSF in patients with advanced breast cancer. Fifty-three patients were randomized to receive either PIXY321. 375 microg/m2 twice a day subcutaneously, or GM-CSF, 250 microg/m2 daily subcutaneously after FLAC chemotherapy. PIXY321 was less well tolerated than GM-CSF, with more patients developing chills and local skin reactions and more patients stopping PIXY321 due to intolerance. While no difference in the neutrophil nadirs was seen with the two cytokines, the duration of the absolute neutrophil count less than 1,000/muL for all cycles was significantly longer with PIXY321 than with GM-CSF. Fifty percent of patients treated with multiple cycles of FLAC chemotherapy on both study arms developed dose-limiting thrombocytopenia. No differences in platelet nadirs, duration of thrombocytopenia, or need for platelet transfusions were observed with PIXY321 versus GM-CSF. The average delivered doses of FLAC chemotherapy were somewhat higher in the GM-CSF study arm. PIXY321 was not superior to GM-CSF in ameliorating the cumulative thrombocytopenia observed with multiple cycles of FLAC chemotherapy and was less well tolerated.
journal_name
Bloodjournal_title
Bloodauthors
O'Shaughnessy JA,Tolcher A,Riseberg D,Venzon D,Zujewski J,Noone M,Gossard M,Danforth D,Jacobson J,Chang V,Goldspiel B,Keegan P,Giusti R,Cowan KHsubject
Has Abstractpub_date
1996-03-15 00:00:00pages
2205-11issue
6eissn
0006-4971issn
1528-0020journal_volume
87pub_type
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