title: A novel Philadelphia chromosome-positive cell line with multipotential properties.
abstract: A novel Philadelphia chromosome-positive cell line was established from the peripheral blood of a patient with chronic myelogenous leukemia in megakaryoblastic crisis. This cell line, designated TN922 showed the positive phenotypes for myeloid, monocyte-macrophage, erythroid and megakaryocytic markers. The stimulation with phorbol 12-myristate 13-acetate (PMA) increased the expression of megakaryocytic markers including the platelet peroxidase activity, dimethylsulfoxide or transforming growth factor-beta promoted up-regulation of the erythroid markers. Stimulation with PMA, tumor necrosis factor-alpha or interleukin-6 also brought about the expression of monocytoid markers. These findings indicated that TN922 cell line has the property of acting as multipotential progenitor cells. TN922 cells showed gradual growth in the absence of growth factors but the addition of granulocyte/macrophage colony-stimulating factor (GM-CSF) promoted cell growth. The message of GM-CSF was detected in TN922 cells and the neutralizing antibody against GM-CSF receptor alpha-subunit suppressed cell growth. These results indicated that TN922 cell line proliferates in an autocrine secretion of GM-CSF.
authors.affiliation: First Department of Internal Medicine, Fukui Medical University, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nakayama
authors.forename: K
authors.initials: K
authors.lastname: Tohyama
authors.forename: S
authors.initials: S
authors.lastname: Imamura
authors.forename: A
authors.initials: A
authors.lastname: Yoshida
authors.forename: T
authors.initials: T
authors.lastname: Fukushima
authors.forename: H
authors.initials: H
authors.lastname: Tsutani
authors.forename: T
authors.initials: T
authors.lastname: Nakamura
authors.forename: Y
authors.initials: Y
authors.lastname: Wano
authors.forename: Y
authors.initials: Y
authors.lastname: Ohno
authors.forename: T
authors.initials: T
authors.lastname: Ueda
mesh_terms: D000368:Aged; D002455:Cell Division / Q000187:drug effects; D002869:Chromosome Aberrations; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000494:pharmacology; D006801:Humans; D015464:Leukemia, Myelogenous, Chronic, BCR-ABL Positive / Q000235:genetics / Q000473:pathology*; D008297:Male; D014407:Tumor Cells, Cultured
chemical_list: D016178:Granulocyte-Macrophage Colony-Stimulating Factor