Abstract
Brief digestion of human peripheral blood lymphocytes by vibrio cholera neuraminidase (VCN) revealed hidden components of the membrane. Autologous human serums contained antibodies directed to these components that were readily demonstrated by immunofluorescence. Antibodies of similar specificity were found in all normal serums. The antibodies were principally of the IgM variety with lesser amounts of the IgG class present. They were equally active at 4 degrees C and 37 degrees C. The VCN revealed membrane determinants were present in normal B and T lymphocytes, monocytes, lymphocytes of patients with chronic lymphatic leukemia and cells of lymphoid lines. The newly revealed determinants slowly disappeared upon culture of the lymphocytes. These hidden components were similarly demonstrated in erythrocyte membranes and represent the T antigen long known for the red blood cells. Absorption by either VCN treated autologous lymphocytes or erythroyctes removed all of the antibodies capable of reacting with both cell types. Absorption by VCN digested isologous lymphocytes removed all reactivity with autologous lymphocytes.
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