Abstract: |
A murine monoclonal antibody (anti-BL7) was raised by immunization of BALB/c mice with a precursor B-cell line (Josh-7) which detects a heat-stable, nonimmunoprecipitable antigen. The expression of BL7 was investigated in peripheral blood and/or bone marrow leukemic cell suspensions stained by indirect immunofluorescence and analyzed by flow cytometry. Lympho-blasts from 43 of 43 cases of “null” acute lymphoblastic leukemia were BL7~. Five cases of T-acute lymphoblastic leukemia and 5 cases of terminal deoxynucleotidyl transferase-positive blastic chronic myelogenous leukemia were also BL7′′. All 63 cases of B-cell chronic lymphocytic leukemia were BL7+ Neoplastic cells in 22 of 28 cases of B-cell non-Hodgkin's lymphomas in leukemic phase were also BL7+. Expression of BL7 showed some correlation with Rappaport's histological classification. Four cases of multiple myeloma and plasma cell leukemia were BL7-. Twenty-three cases of acute nonlymphocytic leukemias were also analyzed. Of these, only the acute promyelocytic (M3,4 cases) and acute myelomonocytic (M4, one case) varieties expressed BL7 on a small proportion (approximately 15%) of the leukemic cells. All other subgroups were BL7′′. The reactivity of anti-BL7 was compared to other B-cell antibodies on selected samples and was shown to be different from B1, B2, and the BA antibodies. Anti-BL7 is a unique monoclonal antibody useful in the study of B-cell cancers. © 1985, American Association for Cancer Research. All rights reserved. |
Keywords: |
leukemia; human cell; flow cytometry; animal; mice; multiple myeloma; cell line; immunofluorescence; chronic myeloid leukemia; mice, inbred balb c; histology; acute lymphoblastic leukemia; b lymphocyte; monoclonal antibody; lymphatic system; antibodies, monoclonal; lymphoma; antigens, surface; acute nonlymphocytic leukemia; antigens, differentiation, b-lymphocyte; leukemia, lymphocytic; human; priority journal; plasma cell leukemia; support, non-u.s. gov't; support, u.s. gov't, p.h.s.; blood and hemopoietic system
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