title: Establishment of novel cell lines derived from two patients with chronic myelogenous leukemia in blast crisis; IMS-BC1 and IMS-BC2 which exhibit markedly different sensitivity to apoptosis.
abstract: We established two novel cell lines, designated as IMS-BC1 and IMS-BC2, from two patients with chronic myelogenous leukemia in blast crisis. The two cell lines were positive for CD13 and CD33 and negative for CD34 and HLA-DR by surface marker analysis. IMS-BC1 had four Philadelphia (Ph1) chromosomes and a breakpoint within the 3'-portion of M-bcr, and IMS-BC2 had five Ph1 chromosomes and two breakpoints within the 3'- and 5'-portions of M-bcr. Both cell lines' growth activities were moderately suppressed by IFN-alpha. The proliferation of IMS-BC2 was inhibited by IFN-gamma and apoptosis was induced within 72 h, while IMS-BC1 was resistant to IFN-gamma. Fibronectin inhibited the proliferation of the two cell lines at higher than 10 micrograms/ml, but only IMS-BC2 showed apoptosis. Transforming growth factor-beta inhibited the proliferation of IMS-BC2 resulting in apoptosis, while it inhibited that of IMS-BC1 moderately but failed to induce apoptosis. All-trans retinoic acid (ATRA) inhibited the proliferation of IMS-BC2 at very low concentration (10(-17) mol/l) and induced apoptosis at doses higher than 10(-9) mol/l within 72 h without terminal differentiation, while IMS-BC1 was completely resistant to ATRA. The two cell lines showed different responses to growth inhibitory cytokines and factors. These cell lines should prove useful in the analysis of mechanisms of apoptosis induced by growth inhibitory cytokines and factors.
authors.affiliation: Department of Hematology/Oncology, Institute of Medical Science, University of Tokyo, Japan. nagamura@hsc.chiba-u.ac.jp
authors.forename: F
authors.initials: F
authors.lastname: Nagamura
authors.forename: T
authors.initials: T
authors.lastname: Nagamura-Inoue
authors.forename: A
authors.initials: A
authors.lastname: Tojo
authors.forename: M
authors.initials: M
authors.lastname: Minamihisamatsu
authors.forename: T
authors.initials: T
authors.lastname: Tanabe
authors.forename: Y
authors.initials: Y
authors.lastname: Zaike
authors.forename: K
authors.initials: K
authors.lastname: Tani
authors.forename: H
authors.initials: H
authors.lastname: Saisho
authors.forename: S
authors.initials: S
authors.lastname: Asano
mesh_terms: D000293:Adolescent; D000328:Adult; D015703:Antigens, CD / Q000276:immunology; D000970:Antineoplastic Agents / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D006801:Humans; D007371:Interferon-gamma / Q000494:pharmacology; D007621:Karyotyping; D015464:Leukemia, Myelogenous, Chronic, BCR-ABL Positive / Q000235:genetics / Q000276:immunology / Q000473:pathology*; D008297:Male; D016212:Transforming Growth Factor beta / Q000494:pharmacology; D014212:Tretinoin / Q000494:pharmacology; D014407:Tumor Cells, Cultured
chemical_list: D015703:Antigens, CD; D000970:Antineoplastic Agents; D016212:Transforming Growth Factor beta; D014212:Tretinoin; D007371:Interferon-gamma