Analysis of a role for BCR-ABL1 in the leukemogenesis using the experimental system that reflects the characteristics of human leukemia

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We devised a unique culture system in which the developments of B cells and T cells as well as myeloid cells from human hematopoietic stem cells can be simultaneously evaluated. BCR-ABL1-transfected human CD34^+ cells showed the highly proliferative potential with different differentiation capacity from that of chronic myelogenous leukemia-derived cells. Monocytes in the peripheral blood proved to be immediate precursors of hepatic stellate cells of hematopoietic stem cell origin. It turned out that in acute type adult T cell leukemia/lymphoma, multiple subclones of common clone origin are present in the lymph nodes and a selected subclone exits into the peripheral blood.