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HJ van der Reijden, DJ van Rhenen, PM Lansdorp, MB van't Veer, MM Langenhuijsen, CP Engelfriet and AE von dem Borne
Surface marker analysis with rosette tests and a large panel of
xenoantisera and monoclonal antibodies was done on the malignant cells of
55 patients with acute myeloid leukemia (AML). The diagnosis was made on
morphological and cytochemical grounds, and the leukemias were classified
according to the quantified FAB criteria. The marker tests included the E-
and EA-rosette test, immunofluorescence with rabbit- polyclonal antisera
against human Ig, kappa, and lambda light chains, thymocytes, granulocytes,
erythrocytes, platelets, lysozyme, (leukemic) myeloblasts, the common ALL
antigen, SB cell-line cells (anti-Ia), and a mouse anti-Ia serum. The
monoclonal mouse antibodies applied were anti-T-cell antibody (3A1), two
anti-granulocyte-monocyte antibodies (OKM1 and B2.12), four antigranulocyte
antibodies (MI/N1, UJ 308, B4.3, and B13.9), an antiplatelet antibody
(C17.28), anti-HLA heavy chains (w6/32.HLK), anti-Ia antigen (OKI1), and
OKT10. AML cells from many patients lacked the expression of myeloid
markers, and we found that a correlation existed between the relative
maturity of the leukemia subtype and the extent of positivity for these
markers. Surface marker analysis discriminated poorly between the "myeloid"
and "monocytoid" subtypes; OKT10 and the "T-cell marker" 3A1 were often
expressed on AML cells. In two cases of AML, there was an unexpected
expression of platelet antigens with the monoclonal antiplatelet antibody.
One of them, classified as M1, was ultrastructurally a megakaryoblastic
proliferation with a positive reaction for platelet peroxidase. Only with
the help of computerized analysis, was it possible to prove a clear
correlation between the surface marker profile and the FAB classification.
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| Copyright © 1983 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||