Inhibition of antibody-dependent cellular cytotoxicity and immunoglobulin synthesis by an antiserum prepared against a human B-cell Ia-like molecule

J Exp Med. 1976 Jul 1;144(1):113-22. doi: 10.1084/jem.144.1.113.

Abstract

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.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Antibody Formation*
  • Antibody-Producing Cells / immunology
  • Antigen-Antibody Reactions
  • B-Lymphocytes / immunology
  • Cell Adhesion
  • Cytotoxicity Tests, Immunologic
  • Erythrocytes / immunology
  • Humans
  • Immunity, Cellular*
  • Isoantigens*
  • Lymphocytes / immunology
  • Receptors, Antigen, B-Cell / analysis
  • Surface Properties

Substances

  • Isoantigens
  • Receptors, Antigen, B-Cell