Expression of Adhesion Molecules CD 11/CD 18 (Leu-CAMs, β2-Integrins), CD54 (ICAM-1) and CD58 (LFA-3) in B -Chronic Lymphocytic Leukemia

Cell adhesion molecules (CAMs) are cell surface proteins with unique specificities that allow intercellular adhesion. The importance of CAMs for normal lymphocyte growth and differentiation is underscored by the association between neoplastic disease states and abnormal CAM expression. In the present study we analysed the cell surface expression of several CAMs on peripheral blood lymphocytes from patients with progressive chronic lymphocytic leukemia of B-cell type (B-CLL) (n = 21) and stable monoclonal B-lymphocytosis of undetermined significance (B-MLUS) (n = 20). The CAM expression was analysed on the B-cell clone and on normal T- and NK-cell populations separately using monoclonal antibodies (MAbs). A phorbol ester-induced lymphocyte aggregation assay and blocking MAbs were also used. The B-cell clone in B-CLL expressed ICAM-1 (CD54) more frequently and at a higher density than in B-MLUS. The brightest CD54 expression was noted in patients with prominent lymphadenopathy and/or splenomegaly. The β2 in...

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