title: Human antibody to OFA-I, a tumor antigen, produced in vitro by Epstein-Barr virus-transformed human B-lymphoid cell lines.
abstract: We established two long-term human B-lymphoblastoid cell lines (L55 and L72) transformed by Epstein-Barr virus that produced IgM kappa antibodies to the human tumor antigen, OFA-I. Periphral blood lymphocytes obtained from melanoma patients were used as the source of the B lymphocytes. Antibody specificity was determined by the immune adherence assay using various human cancer and noncancer tissues as targets. L55 antibody (designated anti-OFA-I-1) reacted with a variety of human tumor types whereas L72 antibody (designated anti-OFA-I-2) reacted only with tumor cells of neuroectodermal origin (melanoma, glioma, and neuroblastoma). The levels of IgM detected in the spent medium of 1 X 10(6) L55 and L72 cells were 4 and 9 micrograms/ml, respectively, by radioimmunoassay.
mesh_terms: D000917:Antibody Formation; D000951:Antigens, Neoplasm / Q000235:genetics*; D001402:B-Lymphocytes / Q000276:immunology*; D002051:Burkitt Lymphoma / Q000276:immunology / Q000382:microbiology*; D002460:Cell Line; D002471:Cell Transformation, Neoplastic; D004854:Herpesvirus 4, Human / Q000235:genetics / Q000276:immunology*; D006801:Humans; D007075:Immunoglobulin M / Q000235:genetics; D007145:Immunoglobulin kappa-Chains / Q000235:genetics; D008545:Melanoma / Q000276:immunology*; D009369:Neoplasms / Q000276:immunology
chemical_list: D000951:Antigens, Neoplasm; D007075:Immunoglobulin M; D007145:Immunoglobulin kappa-Chains; C031192:oncofetal antigens