title: Establishment of novel B-cell precursor leukemia sister cell lines NALM-36 and NALM-37: shift of immunoglobulin phenotype to double light chain positive B-cell.
abstract: Two novel B-cell precursor (BCP) acute lymphoblastic leukemia (ALL) sister cell lines, designated NALM-36 and NALM-37, were established from the peripheral blood (at diagnosis) and bone marrow (at relapse) of a 37-year-old woman with ALL. Immunophenotyping showed BCP type III pre-B cell characteristics including TdT, CD10, CD19, CD22, CD79a and HLA class II. T cell and myeloid-associated antigens tested were negative except CD5 which was 100% positive for both cell lines. The surrogate light chains lambda5 and VpreB were positive for both cell lines. Cytogenetic analysis of NALM-36 revealed an abnormal karyotype with 46, XX, add(1)(q?42), -14, +mar. Southern blot analysis of the immunoglobulin (Ig) genes status of NALM-36 at 10 months after establishment showed germ line configuration of the kappa light chain gene, and rearrangement of the lambda light and mu heavy chain genes. At 16 months we detected a phenotypic shift of Ig chain protein expression from a BCP-III pre-B cell phenotype to a BCP-IV mature B cell phenotype, with kappa and lambda double Ig light chain and mu heavy chain expression, both on the cell surface and in the cytoplasm. We designated this subline as NALM-36KL. Authenticity of the NALM-36KL, NALM-36 and NALM-37 cell lines was demonstrated by DNA fingerprinting. The extensive characterization of the sister cell lines suggests that these three novel cell lines, derived from a single patient, may represent unique and relevant in vitro model systems for BCP-type leukemia cells. They may provide useful models and unprecedented opportunities for analyzing the multitude of biological aspects of normal and neoplastic B-lymphocytes and their precursors.
authors.affiliation: Fujisaki Cell Center, Hayashibara Biochemical Labs, Inc., 675-1 Fujisaki, 702-8006, Okayama, Japan. yomatsuo@hayashibara.co.jp
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Matsuo
authors.forename: Hans G
authors.initials: HG
authors.lastname: Drexler
authors.forename: Makoto
authors.initials: M
authors.lastname: Takeuchi
authors.forename: Kunzo
authors.initials: K
authors.lastname: Orita
mesh_terms: D000328:Adult; D015703:Antigens, CD / Q000032:analysis; D001402:B-Lymphocytes / Q000737:chemistry; D015139:Blotting, Southern; D002875:Chromosomes / Q000235:genetics; D016172:DNA Fingerprinting; D004273:DNA, Neoplasm / Q000032:analysis; D020031:Epstein-Barr Virus Infections; D005260:Female; D015328:Gene Rearrangement, B-Lymphocyte, Light Chain / Q000235:genetics*; D006801:Humans; D007138:Immunoglobulin delta-Chains / Q000235:genetics*; D007145:Immunoglobulin kappa-Chains / Q000235:genetics*; D016130:Immunophenotyping; D007621:Karyotyping; D009363:Neoplasm Proteins / Q000032:analysis; D016133:Polymerase Chain Reaction; D015452:Precursor B-Cell Lymphoblastic Leukemia-Lymphoma / Q000276:immunology* / Q000473:pathology; D014407:Tumor Cells, Cultured / Q000737:chemistry
chemical_list: D015703:Antigens, CD; D004273:DNA, Neoplasm; D007138:Immunoglobulin delta-Chains; D007145:Immunoglobulin kappa-Chains; D009363:Neoplasm Proteins