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  • Title: High expression of the Thy-1 antigen on natural killer cells recently derived from bone marrow.
    Author: Hurme M, Sihvola M.
    Journal: Cell Immunol; 1984 Apr 01; 84(2):276-84. PubMed ID: 6142769.
    Abstract:
    The subset of murine natural killer (NK) cells that kills lymphoma targets contains about 50% cells expressing the Thy-1 antigen and this has been one of the reasons for assigning NK cells to the T-cell differentiation lineage. It has now been shown that the proportion of the Thy-1+ NK cells is not constant: ca. 90% of the NK cells appearing in the spleens of irradiated mice injected 10-14 days previously with bone marrow cells (anti-Thy-1 plus complement treated) express this antigen. The donor origin of these Thy-1+ NK cells was demonstrated by using semisyngeneic bone marrow cells in transfers but this same phenomenon could also be observed after entirely syngeneic transfers, excluding the possibilities that this Thy-1+ NK activity is due to activated T cells or to the effect of T-cell activation products on NK cells. Additionally, these early NK cells expressed the asialo-GM1 antigen, which is found on murine NK cells but not on cytotoxic T cells. These data suggest that the precursors for NK cells in the bone marrow are Thy-1-, and that the first splenic NK cells derived from these progenitors express this antigen.
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