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  • Title: Cultured human leukemic non-T/non-B lymphoblasts and their stimulating capacity in "one-way" mixed lymphocyte reaction: suggestive evidence for early T-cell or B-cell precursors.
    Author: Han T, Dadey B, Minowada J.
    Journal: Cancer; 1979 Jul; 44(1):136-40. PubMed ID: 156581.
    Abstract:
    It is now well recognized that a large proportion of cases with acute lymphoblastic leukemia are classified as non-T/non-B neoplastic disease. The origin of leukemic non-T/non-B cells is at present not known. It has been shown that fresh or cultured leukemic T lymphoblasts exert no stimulating capacity while leukemic B lymphoblasts exert a strong stimulation in "one-way" mixed lymphocyte reaction. It has also been shown that fresh leukemic cells from some patients with non-T/non-B acute lymphoblastic leukemia possess a strong stimulation while leukemic cells from other patients with this disease possess no stimulation on allogeneic lymphocytes. The present study shows that cultured leukemic lymphoblasts from 3 non-T/non-B cell lines (NALL-1, NALM-6 and NALM-16) consistently exert a strong stimulation on allogeneic lymphocytes. On the other hand, cultured leukemic lymphoblasts from 2 non-T/non-B cell lines (REH and KM-3) consistently fail to stimulate in "one-way" mixed lymphocyte reaction. Our data clearly support the speculation that leukemic non-T/non-B cells which possess the stimulating capacity may represent less differentiated leukemic B lymphoid cells (pre-B cells) and leukemic non-T/non-B cells which possess no stimulating capacity may represent less differentiated leukemic T lymphoid cells (per-T cells).
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