title: Esterase isoenzyme profiles of 255 leukemia-lymphoma cell lines from all hematopoietic cell lineages.
abstract: Carboxylic esterase isoenzymes isolated from a panel of well-characterized continuous human leukemia-lymphoma cell lines were separated by isoelectric focusing. Typical isoenzyme patterns designated Mono 1/Mono 2 (for monocyte-associated), My 1/My 2 (for myeloid or myeloma), Lym 1/Lym 2 (for lymphoid) and Und (for undifferentiated) could be reproducibly discerned. The Mono patterns contained one unique isoenzyme encoded by the monocyte-specific esterase gene. This comparative analysis of 255 leukemia-lymphoma cell lines covered the major cell lineage that are affected by hematological neoplasias. The results showed that (except for myelomas) lymphoid-derived malignancies, both leukemias and lymphomas, expressed primarily the Und and Lym esterase isoenzyme profiles. In contrast, myeloid leukemia cells and the related erythroid and megakaryocytic cell lines displayed mainly the My patterns. The Mono patterns were detected predominantly in monocyte-derived leukemias. As the B-lymphocytic hierarchy progresses from pre B-cells via B-cells to plasma cells, number and intensity of the isoenzymes increased as well from the Und pattern to the My isoenzyme profile. Hodgkin's disease and anaplastic large cell lymphoma lines displayed heterogenous isoenzyme profiles consistent with their heterogenous cellular origin. The present study using continuous leukemia-lymphoma cell lines as model systems provides a biochemical characterization of different hematopoietic cell lineages and stages of differentiation.
authors.affiliation: DSM-German Collection of Microorganisms and Cell Cultures, Department of Human and Animal Cell Cultures, Braunschweig, Germany.
authors.forename: S M
authors.initials: SM
authors.lastname: Gignac
authors.forename: Z B
authors.initials: ZB
authors.lastname: Hu
authors.forename: S A
authors.initials: SA
authors.lastname: Denkmann
authors.forename: C C
authors.initials: CC
authors.lastname: Uphoff
authors.forename: H G
authors.initials: HG
authors.lastname: Drexler
mesh_terms: D043182:Carboxylesterase; D002265:Carboxylic Ester Hydrolases / Q000032:analysis; D002454:Cell Differentiation; D019070:Cell Lineage; D004950:Esterases / Q000032:analysis*; D006412:Hematopoietic Stem Cells / Q000201:enzymology*; D006801:Humans; D007525:Isoelectric Focusing; D007527:Isoenzymes / Q000032:analysis*; D007938:Leukemia / Q000145:classification / Q000201:enzymology* / Q000473:pathology; D008223:Lymphoma / Q000145:classification / Q000201:enzymology* / Q000473:pathology; D009283:Naphthol AS D Esterase / Q000032:analysis; D009363:Neoplasm Proteins / Q000032:analysis*; D014411:Neoplastic Stem Cells / Q000201:enzymology*; D014407:Tumor Cells, Cultured
chemical_list: D007527:Isoenzymes; D009363:Neoplasm Proteins; D004950:Esterases; D009283:Naphthol AS D Esterase; D002265:Carboxylic Ester Hydrolases; D043182:Carboxylesterase