title: Expression of Tac antigen in B cell lymphomas.
abstract: In a series of 55 cases of B cell derived non-Hodgkin's lymphoma the reactivity of two distinct anti-Tac monoclonal antibodies was examined using a sensitive immunoperoxidase technique on cryostat sections. Eighteen out of the thirty-five cases of B cell lymphomas of low or intermediate grade of malignancy were found to be reactive while six out of 20 cases of high-grade malignancy lymphomas showed a positive immunostaining. No correlation was found between anti-Tac reactivity and surface immunoglobulin phenotype, T65 antigen, or calla expression. These findings showed that IL2 receptor expression is not restricted to activated T cells, and raise the question of the possible role of IL2 in the regulation of malignant B cell clone expansion.
mesh_terms: D000951:Antigens, Neoplasm / Q000032:analysis*; D000954:Antigens, Surface / Q000032:analysis*; D001402:B-Lymphocytes; D006801:Humans; D006965:Hyperplasia / Q000276:immunology; D007124:Immunoenzyme Techniques; D008198:Lymph Nodes / Q000473:pathology; D008228:Lymphoma, Non-Hodgkin / Q000276:immunology*; D013154:Spleen / Q000276:immunology; D013950:Thymus Gland / Q000276:immunology; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7
chemical_list: D000951:Antigens, Neoplasm; D000954:Antigens, Surface; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7