Recombinant human granulocyte‐macrophage colony‐stimulating factor in children with chemotherapy‐induced neutropenia

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Abstract
Twenty children 1–17 (median, 5.5) years of age received GM‐CSF during chemotherapy‐induced neutropenia at the dose of 5 μg/kg/day, continued until the absolute neutrophil count (ANC) exceeded 500 × 106/liter. Twelve children with solid tumors received GM‐CSF after courses of conventional chemotherapy (VP‐16 + ifosfamide or “6 in 1”). One course followed by GM‐CSF was compared to identical courses without GM‐CSF in the same patients. Eight children with recurrent/poor risk malignancies received GM‐CSF after marrow‐ablative therapy and autologous bone marrow transplantation (ABMT). Their engraftment data were compared to matched historical controls. In both groups GM‐CSF accelerated myeloid recovery, which was preceded by the appearance of immature myeloid elements in bone marrow. The ANC levels of 200, 500, and 1,000 × 106/liter were exceeded 2, 3 (PPP<0.05), and 9 days earlier in the ABMT group, as compared to the controls. All adverse effects observed were mild, including skin rashes, nasal stuffiness, general achiness, nausea, and fever. We conclude that GM‐CSF is well tolerated in children and accelerates myeloid recovery in chemotherapy‐induced neutropenia.

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