title: Lectin-dependent neutrophil-mediated cytotoxicity. I. Characteristics.
abstract: Isolated normal human peripheral neutrophils became cytotoxic to chicken red blood cells (CRBC) in the presence of phytohaemagglutinin (PHA) and concanavalin A (Con A), a phenomenon which we have termed lectin-dependent neutrophilmediated cytotoxicity (LDNMC). Substantial cytotoxicity could be demonstrated by 1 h of incubation at 37 degrees. Isolated human peripheral lymphocytes were not cytotoxic to CRBC in the presence of these lectins, even after 18 h of incubation. Both PHA and Con A exhibited dose responses over a wide concentration range and displayed progressive, time-dependent cytotoxicity. Cytotoxicity for both PHA and Con A was greater at 37 degrees than at 22 degrees, and was undetectable at 4 degrees. CRBC as target cells were much more readily lysed than either sheep or human erythrocytes. Erythrophagocytosis did not appear to play a role.
mesh_terms: D003208:Concanavalin A / Q000494:pharmacology; D003601:Cytotoxicity Tests, Immunologic; D004912:Erythrocytes / Q000166:cytology / Q000276:immunology; D006801:Humans; D066298:In Vitro Techniques; D037102:Lectins / Q000494:pharmacology; D008214:Lymphocytes / Q000276:immunology; D009504:Neutrophils / Q000166:cytology / Q000276:immunology*; D010587:Phagocytosis; D013696:Temperature; D013997:Time Factors
chemical_list: D037102:Lectins; D003208:Concanavalin A