Determination of morphology and immunophenotype of circulating lymphoma cells in patients with splenic marginal zone lymphoma using an anti-CD antibody microarray

We have studied the morphology and immunophenotype of circulating tumor cells isolated from peripheral blood of 22 patients with splenic marginal zone lymphoma and show that both of them are highly heterogeneous. Using a cell-binding microarray we have demonstrated that the circulating lymphoma cells are positive for CD19 (100 %), CD20 (100 %), CD22 (100 %), surface IgM (73 %), CD38 (23 %), CD5 (9 %), CD11c (36 %), CD103 (5 %), CD25 (32 %), CD23 (23 %) and these immunophenotypes are confirmed in all cases by flow cytometry.Higher surface density of lymphocyte binding onto anti-CD antibody microarray spots compared to blood smears permits to find circulating lymphoma cells even in leukopenic patients

MORPHOLOGY AND DISTRIBUTION OF Α-NAPHTHYL BUTIRATE ESTERASE AND NAPHTHOL AS-D CHLOROACETATE ESTERASE IN NORMAL MYELOMONOCYTIC PRECURSORS STUDIED BY THE CELL MICROARRAY

Here we describe and qualitatively characterize the distribution of mononuclear cells isolated from bone marrow aspirate of healthy donors and sorted by their surface CD antigens on a cell microarray by morphology (for 11 donors) and by absence or presence of α-naphthyl butyrate esterase and naphthol AS-D chloroacetate esterase (for 9 donors). These data can be used as a reference for the diagnosis of acute myeloid leukemia using the cell microarray

Cell-binding microarray application in diagnosis of hairy cell leukemia

We describe an application of a cell-binding microarray – to parallel study of morphology, tartrate-resistant acid phosphatase activity and detection of surface markers on peripheral blood lymphocytes of 90  atients with suspected hairy cell leukemia (HCL). We have formulated the microarray-based diagnostic criteria for hairy cell leukemia, hairy cell leukemia variant (HCLv) and splenic marginal zone lymphoma (SMZL). According to these criteria we have suggested the presence of HCL for 55 patients, HCLv – for 7 patients and SMZL – for 10 patients from the studied cohort. These diagnoses were confirmed by standard diagnostic methods in all cases. These results show that the cellbinding microarray can be used in differential diagnosis of HCL, while the high sensitivity of the microarray permits to detect the leukemic cells in spite of leukopenia and low hairy cell content