title: New cell line from hairy-cell leukemia: confirmation of leukemic cell origin by karyotype and Ig gene analysis.
abstract: A hairy-cell leukemia (HCL) line, BNBH-I, was established from the peripheral blood of a 40-year-old male patient with HCL in a relatively stable clinical phase after splenectomy. The cells have since been growing continuously for more than 2 years. Their cell surface immunoglobulin (sIg) was identical with that found on the surface of freshly isolated leukemic cells, consisting of IgG-kappa. The BNBH-I cells were more mature than the original hairy cells in their degree of B-cell differentiation, as reflected by a decrease in sIg expression together with the appearance of some cytoplasmic Ig (cIg)+ cells, loss of EA gamma-rosette formation and reactivity with monoclonal antibody (MAb) FMC7, and an increase in the proportion of MAb PCA-I+ cells. The BNBH-I cells possessed the antigen recognized by Leu-M5, a highly specific MAb for HCL. Epstein-Barr virus nuclear antigen (EBNA) was present. Both the freshly isolated leukemic cells and the cell line had the 14q+ involving q32 chromosomal abnormality, and their Ig gene rearrangements were also identical. Following exposure to 12-O-tetradecanoylphorbol-13-acetate (TPA), both the freshly isolated leukemic cells and the BNBH-I cells adhered to culture dishes and extended long, thin processes, a phenomenon characteristic of HCL. These results indicate that the BNBH-I line was derived from the leukemic hairy cells.
authors.affiliation: Department of Clinical Research, Osaka University, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Tokumine
authors.forename: E
authors.initials: E
authors.lastname: Ueda
authors.forename: H
authors.initials: H
authors.lastname: Ogawa
authors.forename: H
authors.initials: H
authors.lastname: Sugiyama
authors.forename: M
authors.initials: M
authors.lastname: Taniwaki
authors.forename: T
authors.initials: T
authors.lastname: Abe
authors.forename: Y
authors.initials: Y
authors.lastname: Kanayama
authors.forename: T
authors.initials: T
authors.lastname: Hashimoto
authors.forename: R
authors.initials: R
authors.lastname: Inoue
authors.forename: T
authors.initials: T
authors.lastname: Machii
mesh_terms: D000328:Adult; D000911:Antibodies, Monoclonal; D002460:Cell Line; D002462:Cell Membrane / Q000648:ultrastructure; D002869:Chromosome Aberrations; D006801:Humans; D007136:Immunoglobulins / Q000235:genetics*; D007621:Karyotyping; D007943:Leukemia, Hairy Cell / Q000235:genetics; D008297:Male; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D014407:Tumor Cells, Cultured / Q000187:drug effects
chemical_list: D000911:Antibodies, Monoclonal; D007136:Immunoglobulins; D013755:Tetradecanoylphorbol Acetate