It has been shown in both human and mouse that the level of CD20 expression increases with the stage of maturation of the B cell therefore showing differing amounts according to the B cell subset (Uchida et … - USA CD20 is also associated with lipid rafts, but the intensity of this association depends on extracellular triggering, employing CD20 conformational change, and/or BCR (B cell antigen receptor) aggregation. CD20 + B lymphocytes represented 8% to 35% of circulating lymphocytes and most circulating B cells were CD20 + (Figure 1B-C). Also called CD20. CD20 is also found to a lesser extent on some T cell subsets. CD20 antigen is a type of tumor marker. CD20 MicroBeads were developed for positive selection or depletion of human CD20+ B cells from different cell sources such as human PBMCs, bone marrow, cell cultures or lymphoid tissues. CD20 is a cell-surface antigen mainly expressed by cells of the B cell lineage, encompassing B cell precursors and mature B cells but not hematopoetic stem cells and plasma cells [7,8].Therefore, ocrelizumab is often considered to selectively deplete CD20-expressing B cells [].However, CD20 is also expressed on a small subset of CD3 + T cells. Measuring the amount of CD20 antigen on blood cells may help to diagnose cancer or plan cancer treatment.
Introduction. CD20 is also known as B-lymphocyte surface antigen B1, and Bp35 and is expressed on almost all B cells, except plasma cells. CD20 expression on B cells is synchronous with the expression of surface IgM and it regulates transmembrane calcium conductance, cell cycle progression and B-cell proliferation. CD20 is a B lymphocyte‐specific cell‐surface molecule involved in the regulation of transmembrane Ca 2+ conductance and cell‐cycle progression during human B cell activation ().CD20 is first expressed by human pre‐B cells in the bone marrow, predominantly after Ig heavy chain rearrangement, with expression persisting until plasma cell differentiation (2–4). These cells accounted for 2.4% of all CD45-expressing lymphocytes — white blood cells that include T- and B-cells — and for a significant proportion (18.4%) of all CD20 cells. This test is not useful for assessing whether B cells express the target molecule (CD20) in the context of initiating therapeutic monoclonal anti-CD20 antibody therapy (rituximab, ofatumumab, and tositumomab) for any of the hematological malignancies, or in other clinical contexts, such as autoimmunity, instead order CEE20 / CD20 Cell Expression Evaluation, Varies. CD20 + B cells remained nearly Rituximab eliminated essentially all circulating CD20 + B cells within 24 hours for each patient, despite uninterrupted daily TPEx. A protein found on B cells (a type of white blood cell). It may be found in higher than normal amounts in patients with certain types of B-cell lymphomas and leukemias.
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