title: Establishment and biological characteristics of human multiple myeloma cell line CZ-1.
abstract: BACKGROUND
  There were only 3 multiple myeloma (MM) cell lines established in China. In this study, we succeeded in establishing a novel MM cell line and analyzed its biological characteristics.
  
  
  METHODS
  Mononuclear cells isolated from the peripheral blood (PB) and bone marrow (BM) of a patient with advanced MM (lambda light chain type) were cultured in medium. Cell morphology was analyzed by Wright-Giemsa-staining and cytochemical staining, immunophenotyping by flow cytometry and cytogenetic analysis by chromosome RHG-banding technique. Quantitative fluorescent polymerase chain reaction (PCR) was used to detect Epstein - Barr virus (EBV) DNA.
  
  
  RESULTS
  The established cell line could survive and proliferate in the presence of feeder cells or conditioned medium. The cells secreted lambda light chain and were negative for EBV. The Wright-Giemsa-staining showed typical plasmablast or plasma cell morphology. The cytochemical staining of the cells showed the following reactivity patterns: positive for acid phosphatase, negative for myeloperoxidase. The immunoprofile of the cells was concordant with that of MM cells: positive for CD10, CD28, CD38, CD138, CD56, CD49d, CD44, CD54 and CD58, negative for CD19, CD40, CD95, CD95L, CD34, CD2 and CD5. The cytogenetic analysis showed complex chromosome abnormality of i (1q+), 8q+, 13q+, i (17q), i (18q) and +M. There was no difference in morphology, immunophenotype and cytogenetics between cells from PB and BM.
  
  
  CONCLUSIONS
  An MM cell line secreting lambda light chain named CZ-1 was established. The cells from both PB and BM have the same biological characteristics.
authors.affiliation: Department of Hematology, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China. houjian167@sohu.com
authors.forename: Jian
authors.initials: J
authors.lastname: Hou
authors.forename: Fa-ying
authors.initials: FY
authors.lastname: Lin
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.forename: Ling-zhen
authors.initials: LZ
authors.lastname: Zhang
authors.forename: Si-qi
authors.initials: SQ
authors.lastname: Ding
mesh_terms: D045744:Cell Line, Tumor; D002869:Chromosome Aberrations; D004854:Herpesvirus 4, Human / Q000302:isolation & purification; D006801:Humans; D008297:Male; D008875:Middle Aged; D009101:Multiple Myeloma / Q000235:genetics* / Q000473:pathology*; D016133:Polymerase Chain Reaction