A novel antigen detected by the CBF.78 antibody further distinguishes anaplastic large cell lymphoma from Hodgkin's disease.
A novel antigen detected by the CBF.78 monoclonal antibody (MoAb) is strongly expressed on cortical thymocytes and weakly expressed on resting peripheral T lymphocytes. Expression of the antigen is increased on phytohemagglutinin (PHA)- and anti-CD3-activated T lymphocytes and on Epstein-Barr virus-transformed B lymphocytes. The CBF.78 immunoprecipitated a protein of 116 kD from resting and PHA-activated peripheral blood mononuclear cells. CBF.78 MoAb did not inhibit T-cell proliferation induced by anti-CD3 antibody. This MoAb was effective for immunostaining on paraffin sections after microwave-oven heating of tissue sections. Among malignant lymphomas, the antigen recognized by CBF.78 MoAb was found to be mainly expressed by T-cell lymphomas (49+ of 74), particularly those of high-grade malignancy (31+ of 36), whereas only occasional B-cell lymphomas (4+ of 107) expressed the antigen. A distinctive pattern of reactivity was shown by 108 cases of anaplastic large cell lymphomas. Strong positivity for CBF.78 antibody was observed in 86+ of 108 cases, irrespective of B, T, or null phenotype. This multicenter study suggests that CBF.78 MoAb could be of diagnostic value in differentiating Hodgkin's-like anaplastic large cell lymphomas from cases of Hodgkin's disease rich in neoplastic cells. Only a few cases of Hodgkin's disease (13+ of 126) showed rare Reed-Sternberg cells that stained, In these few cases, staining was weak to moderate and confined to cytoplasm. CBF.78 MoAb was nonreactive with all nonhematopoietic neoplasms examined (0+ of 48). Further studies should delineate the function of this new antigen and its clinical utility.
al Saati
T
T
Department of Pathology and CIGH/CNRS, CHU-Purpan, Toulouse, France.
Tkaczuk
J
J
Krissansen
G
G
Print
C
C
Pileri
S
S
Ralfkiaer
E
E
Grogan
T M
TM
Meggetto
F
F
Delsol
G
G
D000818:Animals; D000911:Antibodies, Monoclonal / Q000494:pharmacology; D000951:Antigens, Neoplasm / Q000032:analysis*; D003937:Diagnosis, Differential; D005434:Flow Cytometry; D006689:Hodgkin Disease / Q000175:diagnosis* / Q000276:immunology; D006801:Humans; D007124:Immunoenzyme Techniques; D007163:Immunosorbent Techniques; D016403:Lymphoma, Large B-Cell, Diffuse / Q000175:diagnosis* / Q000276:immunology; D016399:Lymphoma, T-Cell / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D013601:T-Lymphocytes / Q000276:immunology
D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm