title: CD9 correlates with cancer stem cell potentials in human B-acute lymphoblastic leukemia cells.
abstract: Cancer stem cell (CSC) theory suggests that only a small subpopulation of cells having stem cell-like potentials can initiate tumor development. While recent data on acute lymphoblastic leukemia (ALL) are conflicting, some studies have demonstrated the existence of such cells following CD34-targeted isolation of primary samples. Although CD34 is a useful marker for the isolation of CSCs in leukemias, the identification of other specific markers besides CD34 has been relatively unsuccessful. To identify new markers, we first performed extensive analysis of surface markers on several B-ALL cell lines. Our data demonstrated that every B-ALL cell line tested did not express CD34 but certain lines contained cell populations with marked heterogeneity in marker expression. Moreover, the CD9(+) cell population possessed stem cell characteristics within the clone, as demonstrated by in vitro and transplantation experiments. These results suggest that CD9 is a useful positive-selection marker for the identification of CSCs in B-ALL.
authors.affiliation: Division of Clinical Immunology, Advanced Clinical Research Center, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan.
authors.forename: Hiroko
authors.initials: H
authors.lastname: Nishida
authors.forename: Hiroto
authors.initials: H
authors.lastname: Yamazaki
authors.forename: Taketo
authors.initials: T
authors.lastname: Yamada
authors.forename: Satoshi
authors.initials: S
authors.lastname: Iwata
authors.forename: Nam H
authors.initials: NH
authors.lastname: Dang
authors.forename: Takeshi
authors.initials: T
authors.lastname: Inukai
authors.forename: Kanji
authors.initials: K
authors.lastname: Sugita
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Ikeda
authors.forename: Chikao
authors.initials: C
authors.lastname: Morimoto
mesh_terms: D000818:Animals; D015703:Antigens, CD / Q000096:biosynthesis*; D000951:Antigens, Neoplasm / Q000096:biosynthesis*; D014408:Biomarkers, Tumor / Q000096:biosynthesis*; D045744:Cell Line, Tumor; D006801:Humans; D008562:Membrane Glycoproteins / Q000096:biosynthesis*; D051379:Mice; D014411:Neoplastic Stem Cells / Q000378:metabolism / Q000473:pathology*; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000378:metabolism / Q000473:pathology*; D060245:Tetraspanin 29; D014183:Transplantation, Heterologous
chemical_list: D015703:Antigens, CD; D000951:Antigens, Neoplasm; D014408:Biomarkers, Tumor; C554869:CD9 protein, human; C554870:Cd9 protein, mouse; D008562:Membrane Glycoproteins; D060245:Tetraspanin 29