Peripheral blood (PB) CD34+ cells from four commonly used mobilization protocols were studied to compare their phenotype and proliferative capacity with steady-state PB or bone marrow (BM) CD34' cells. Mobilized PB CD34+ cells were collected during hematopoietic recovery after myelosuppressive chemotherapy with or without granulocytemacrophage colony-stimulating factor (GM-CSF) or granulocyte c...

I!. Haemopoietic growth factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 A. lnterleukin 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 I. Cells which respon.d to interleukin 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Our preliminary results suggest the existence of quantitative and qualitative differences in immune cells and type1 and type2 cytokines between granulocyte colony-stimulating factor (G-CSF) primed bone marrow (G-BM) and G-CSF-mobilized peripheral blood grafts (G-PB). Our findings suggest that lower T-cell hyporesponsiveness and easier polarization of T cells from Th1 to Th2 are found in G-BM.