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  • Title: Use of recombinant human growth hormone (rhGH) plus recombinant human granulocyte colony-stimulating factor (rhG-CSF) for the mobilization and collection of CD34+ cells in poor mobilizers.
    Author: Carlo-Stella C, Di Nicola M, Milani R, Guidetti A, Magni M, Milanesi M, Longoni P, Matteucci P, Formelli F, Ravagnani F, Corradini P, Gianni AM.
    Journal: Blood; 2004 May 01; 103(9):3287-95. PubMed ID: 14726397.
    Abstract:
    The activity of recombinant human growth hormone (rhGH) in enhancing CD34(+) cell mobilization elicited by chemotherapy plus recombinant human granulocyte colony-stimulating factor (rhG-CSF) was evaluated in 16 hard-to-mobilize patients, that is, those achieving a peak of circulating CD34+ cells 10/microL or less, or a collection of CD34(+) cells equal to or less than 2 x 10(6)/kg. Patients who had failed a first mobilization attempt with chemotherapy plus rhG-CSF (5 microg/kg/d) were remobilized with chemotherapy plus rhG-CSF and rhGH (100 microg/kg/d). As compared with rhG-CSF, the combined rhGH/rhG-CSF treatment induced significantly higher (P < or =.05) median peak values for CD34(+) cells/microL (7 versus 29), colony-forming cells (CFCs)/mL (2154 versus 28,510), and long-term culture-initiating cells (LTC-ICs)/mL (25 versus 511). Following rhG-CSF and rhGH/rhG-CSF, the median yields of CD34(+) cells per leukapheresis were 1.1 x 10(6)/kg and 2.3 x 10(6)/kg (P < or =.008), respectively; the median total collections of CD34(+) cells were 1.1 x 10(6)/kg and 6 x 10(6)/kg (P < or =.008), respectively. No specific side effect could be ascribed to rhGH, except a transient hyperglycemia occurring in 2 patients. Reinfusion of rhGH/rhG-CSF-mobilized cells following myeloablative therapy resulted in prompt hematopoietic recovery. In conclusion, our data demonstrate that in poor mobilizers addition of rhGH to rhG-CSF allows the patients to efficiently mobilize and collect CD34(+) cells with maintained functional properties.
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