title: A highly sensitive and reproducible microcytotoxicity assay for demonstrating cytotoxic antibodies to cell surface antigens.
abstract: An assay is described, in which target cells are suspended in diluted rabbit serum (as a source of complement) and pipetted into the wells of Falcon No. 3034 Microtest plates, to which diluted antiserum (or control serum) has been added. After 18--24 h of incubation, the plates are stained with crystal violet and counted using an electronic Quantimet image analyzer. This technique could reproducibly detect complement-dependent cytotoxic antibodies to target cell H-2 antigens and to MuLV gp70 on cell lines which expressed this antigen, at serum dilutions up to 1:160,000. The cytotoxic antibodies could be removed by absorption of sera with cells carrying the respective antigens.
mesh_terms: D000818:Animals; D000912:Antibodies, Neoplasm; D000937:Antigen-Antibody Reactions; D000951:Antigens, Neoplasm; D002462:Cell Membrane / Q000276:immunology; D003601:Cytotoxicity Tests, Immunologic / Q000379:methods*; D007106:Immune Sera / Q000494:pharmacology; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D011817:Rabbits; D012513:Sarcoma, Experimental / Q000276:immunology
chemical_list: D000912:Antibodies, Neoplasm; D000951:Antigens, Neoplasm; D007106:Immune Sera