Abstract
Certain bovine peripheral blood lymphocytes (PBL) and foetal thymocytes were shown to bind autologous and allogeneic red blood cells (RBC). When autologous RBC were treated with dextran, approximately 10% of peripheral blood lymphocytes and about 30% of thymocytes were found to form rosettes. Cells forming autologous rosettes appear to be a population of T-lymphocytes because (1) more rosette formation occurred with thymocytes than with PBL, (2) autologous rosette formation was increased in PBL cultures enriched in T cells and was decreased in cultures depleted of T cells, (3) very few rosette forming cells had surface immunoglobulin and (4) peripheral blood mononuclear cell cultures depleted of monocytes did not show a decreased autologous rosette formation. It appears that the cells forming rosettes with autologous and allogeneic RBC belong to the same sub-population of T-cells.
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