RT Journal Article SR Electronic T1 Identification and Separation of Thy-1 Positive Mouse Spleen Cells Active in Natural Cytotoxicity and Antibody-Dependent Cell-Mediated Cytotoxicity JF The Journal of Immunology JO J. Immunol. FD American Association of Immunologists SP 2851 OP 2860 VO 123 IS 6 A1 Mattes, M. Jules A1 Sharrow, Susan O. A1 Herberman, Ronald B. A1 Holden, Howard T. YR 1979 UL http://www.jimmunol.org/content/123/6/2851.abstract AB The expression of the Thy-1 antigen on mouse spleen cells responsible for NK activity and ADCC was investigated by using a monoclonal IgM anti-Thy-1.2 antibody. Both C-mediated cytotoxicity and the fluorescence-activated cell sorter were used to fractionate cells. The effector cells were found to be heterogeneous in their expression of Thy-1. Effector cells from nude BALB/c mice were predominantly Thy-1 positive; some of the NK cells in CBA spleens appeared to be Thy-1 positive, but at least one-third of the lytic activity was due to Thy-1 negative cells. The effects of treatments on NK cytotoxicity and ADCC were very similar, supporting the hypothesis that the same cells mediate both activities.