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.