Rabbit antisera to the human B-cell-specific antigen complex, p23,30, was used to define further the functional heterogeneity of isolated human lymphocyte subpopulations. Specific depletion of p23,30-bearing cells from Ig-negative cell populations and Ig-negative, E rosette-negative (Null) populations by either complement-mediated lysis or by physical separation on goat antirabbit Fab immunoabsorbent columns, eliminates the antibody-dependent cellular cytotoxic (ADCC) function. Furthermore, binding of anti-p23,30 serum to the effector cell surface inhibits ADCC but does not interfere with EA rosette formation. Apparently p23,30 represents a cell surface site which is distinct from the Fc receptor but which is important in the triggering of ADCC. In addition, depletion of p23,30-bearing cells from unfractionated cell populations, Ig-positive B-cell populations and Ig-negative, E rosette-negative (Null) populations eliminates the capacity of these populations to secrete immunoglobulin during subsequent culturing. Thus both the Ig-secreting cells and the ADCC effector cells within the Ig-negative, E rosette-negative (Null) population reside in the same population of cells which bears the p23,30 antigen.
Inhibition of antibody-dependent cellular cytotoxicity and immunoglobulin synthesis by an antiserum prepared against a human B-cell Ia-like molecule.
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L Chess, R Evans, R E Humphreys, J L Strominger, S F Schlossman; Inhibition of antibody-dependent cellular cytotoxicity and immunoglobulin synthesis by an antiserum prepared against a human B-cell Ia-like molecule.. J Exp Med 1 July 1976; 144 (1): 113–122. doi: https://doi.org/10.1084/jem.144.1.113
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