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- W1518416401 abstract "Abstract In a previous report, peripheral blood mononuclear T cells from a patient with T-chronic lymphocytic leukemia (T-CLL) were shown to bear receptors for the Fc portion of IgG (T gamma). Moreover, the ability of these cells to rosette with sheep erythrocytes was strongly inhibited by a preincubation of the cells with theophylline. These data indicated that they represent a highly purified subpopulation of Fc-IgG receptor-positive, low-affinity rosetting cells with in vitro suppressor activity on lectin-induced proliferation of normal lymphocytes. They also were reactive in antibody-dependent cell-mediated cytotoxicity but had no reactivity in natural killer cell assays. These cells were studied in this report with several heteroantisera and monoclonal antibodies. Results indicate that these T-CLL cells express a T cell antigenic pattern (OKT-3+) and the majority are Ia positive. They also react with the OKT-8 reagent (a reagent detecting the subset of T cells that contains the cytotoxic/suppressor cells), whereas they are negative with OKT-4 (which reacts with the subset of T cells that contains helper cells) and OKT-6 (thymocyte) antibodies. Heteroantisera also support the results obtained with monoclonal reagents. Despite some recent evidence showing that a high percentage of T gamma cells may belong to the monocyte-myeloid lineage, these T-CLL cells were negative with OKM-1, a monoclonal antibody reported to detect a monomyeloid antigen. These results suggest that a distinct subpopulation of suppressor T cells can be identified by membrane-marker phenotyping." @default.
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- W1518416401 date "1981-06-01" @default.
- W1518416401 modified "2023-10-18" @default.
- W1518416401 title "Antigenic characterization of a T-CLL with heteroantisera and monoclonal antibodies: evidence for the T cell lineage of an Ia-positive, Fc-IgG--positive, suppressor-cell subpopulation." @default.
- W1518416401 doi "https://doi.org/10.4049/jimmunol.126.6.2205" @default.
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