Modulation of Sheep Erythrocyte Receptor Expression by Anti‐CD4, Anti‐CD8, and Anti‐HLA Antibodies

Abstract
The modulation of E receptors on T cells by anti-CD4 and/or anti-CD8 is reported. The percentage of E rosette-forming cells (RFC) was decreased when sheep erythrocyte and mononuclear cells were incubated in the presence of monoclonal antibodies anti-CD4 and/or anti-CD8. This inhibition was not due to shedding of the E receptor and it was reversed by 8-Br.-3',5' cyclic guanosine monophosphate (cGMP). In contrast, anti-HLA antibodies induced an enhancement of sheep erythrocyte receptor expression evaluated by RFC.