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RE Champlin, SD Nimer, P Ireland, DH Oette and DW Golde
UCLA Center for Health Sciences 90024-1678.
Fifteen patients with refractory aplastic anemia or agranulocytosis
received treatment with recombinant human granulocyte-macrophage-colony-
stimulating factor (rhGM-CSF) in doses from 4 to 64 micrograms/kg/d by
continuous intravenous (IV) infusion. Ten of 11 evaluable patients with
aplastic anemia had substantial increments in granulocytes, monocytes, and
eosinophils associated with myeloid and eosinophilic hyperplasia in the
bone marrow. Patients with pretreatment granulocytes greater than 0.3 x
10(9)/L had greater increments in circulating myeloid cells than patients
with more severe granulocytopenia. Only one patient had improvement in
erythrocytes and platelets. Blood counts fell to baseline after rhGM-CSF
treatment was discontinued. Doses up to 16 micrograms/kg/d were relatively
well tolerated in the absence of extreme leukocytosis. Fatigue and myalgia
were common. Three patients developed pulmonary infiltrates that resolved
with discontinuation of treatment. Patients tended to have recurrent
inflammation in previously diseased tissues. These data indicate that
rhGM-CSF will increase circulating granulocytes, monocytes, and eosinophils
in patients with refractory aplastic anemia. Further studies are necessary
to determine if rhGM-CSF treatment will reduce morbidity or improve
survival.
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| Copyright © 1989 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||