Interleukin-2 (r-IL-2)-induced lymphokine-activated killer (LAK) cells and their precursors express the VGO1 antigen
Tóm tắt
Precursor and effector cells of recombinant interleukin-2 (r-IL-2)-induced lymphokine-activated killer (LAK) activity were investigated for their expression of VGO1. Peripheral blood lymphocytes (PBL) from normal donors were purified and separated in a FACS 420 into VGO1+-and VGO1−-cell fractions before and after culture for 96 hr with 100 U/ml of r-IL-2. Their lytic activity against K 562 and Daudi cells was measured in a51Cr release assay. The majority, if not all, of the LAK effector and precursor cells was VGO1+ lymphocytes. The expression of VGO1 by LAK precursor cells remained stable under the culture conditions used in our experiments. VGO1− lymphocytes cultured with r-IL-2 demonstrated neither LAK-induced activity nor expression of VGO1 antigen.
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