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Thymic stromal cells support differentiation of natural killer cells from CD34+ bone marrow cells in vitro

, : Thymic stromal cells support differentiation of natural killer cells from CD34+ bone marrow cells in vitro. European Journal of Haematology 54(1): 46-50

Natural killer (NK) cells are CD3-CD56+ lymphocytes characterized by exhibiting non-MHC restricted cytotoxicity. A developmental relationship between NK cells and T lymphocytes has been proposed, and, moreover, the thymus has been shown to contain NK cell precursors. In this study we utilized an in vitro assay, devised to study T-tymphocyte development from bone marrow progenitors, to investigate the ability of thymic stromal cells to support generation of NK cells from CD34+ bone marrow cells. CD34+ cells purified from healthy adults were seeded on adherent thymic stromal cells. The cells emerging after culture were phenotypically characterized by flow cytometry. We show that lymphocytes expressing the phenotypical characteristics of NK cells were generated from CD34+ bone marrow cells, and that these cells represented 1% of the cells recovered from the cultures. Furthermore, this was accomplished without supplement of exogenous interleukin 2 which is required for NK cell differentiation in bone marrow cultures.


PMID: 7532139

DOI: 10.1111/j.1600-0609.1995.tb01625.x

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