Granulocyte Transfusions in Children With Chronic Granulomatous Disease and Invasive Aspergillosis

: The transfusion of granulocytes to restore host defenses in severely granulocytopenic patients or in patients with defective granulocyte functions has been studied for more than 60 years. However, inadequate dosage of cells and inconsistent efficacy has limited the usage of these transfusions. Recently, the use of mobilizing agents such as granulocyte colony stimulating factors and dexamethasone has renewed interest in these treatment modalities. The present study is conducted to determine an appropriate method of enriched granulocyte collection with Fresenius AS.TEC.204 cell separator (Fresenius, Bad Homburg, Germany) and to evaluate the preliminary clinical results of granulocyte transfusion therapy in patients with chronic granulomatous disease and invasive Aspergillosis in parallel with in vitro granulocyte function. Three patients who have been treated for chronic granulomatous disease and invasive Aspergillosis received a total of 20 granulocyte transfusions. To mobilize granulocytes, healthy donors were given 450 µg of granulocyte colony‐stimulating factor (G‐CSF) subcutaneously and 8 mg of dexamethasone orally approximately 12 h before collection. Five µg/kg/day of G‐CSF was also subcutaneously administered prior to granulocyte transfusions. The first patient received 4; the second, 14 and the third, 2 transfusions. The granulocyte count given to these patients ranged between 0.4 and 3.0 × 109/kg. Most transfusions were well tolerated. The nitroblue tetrazolium (NBT) tests that were done 16–24 h after the transfusion showed 14–46% dye reduction. Two of the three patients survived the infection. Granulocyte transfusions from G‐CSF and dexamethasone stimulated donors could be a choice of treatment in chronic granulomatous disease patients, especially with disseminated invasive Aspergillosis.