title: CD34 antigen expression in children with Philadelphia chromosome-positive acute lymphoblastic leukemia.
abstract: One characteristic of Philadelphia chromosome (Ph')-positive acute leukemia is the occasional presence of both lymphoid and myeloid features in the same leukemia. This phenomenon supports the theory that this subtype of acute leukemia arises from lymphoid-myeloid stem cell, pluripotent progenitors. Very few reports, however, describe the immunophenotype, especially CD34 antigen, of Ph'-positive acute lymphoblastic leukemia (ALL). It has been shown that CD34, the human progenitor cell antigen, is found on 1% or less of normal human bone marrow cells, approximately 30% of acute leukemias, and multipotent progenitor cells; CD34 is not found on normal peripheral blood cells. A high frequency of CD34 expression was found in children with Ph'-positive ALL: CD34 was positive for all six patients tested, and one had an acute mixed-lineage leukemia. These findings suggest the involvement of a pluripotent stem cell in Ph'-positive ALL.
authors.affiliation: Department of Pediatrics, Mie University School of Medicine, Mie-Ken, Japan.
authors.forename: E
authors.initials: E
authors.lastname: Azuma
authors.forename: M
authors.initials: M
authors.lastname: Umemoto
authors.forename: M
authors.initials: M
authors.lastname: Kubo
authors.forename: Y
authors.initials: Y
authors.lastname: Ohta
authors.forename: S L
authors.initials: SL
authors.lastname: Zhang
authors.forename: Y
authors.initials: Y
authors.lastname: Komada
authors.forename: M
authors.initials: M
authors.lastname: Ito
authors.forename: M
authors.initials: M
authors.lastname: Sakurai
mesh_terms: D015703:Antigens, CD / Q000032:analysis*; D018952:Antigens, CD34; D000943:Antigens, Differentiation / Q000032:analysis*; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D002869:Chromosome Aberrations / Q000235:genetics; D025063:Chromosome Disorders; D006801:Humans; D016130:Immunophenotyping; D007621:Karyotyping; D007770:L-Lactate Dehydrogenase; D008297:Male; D010677:Philadelphia Chromosome; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000188:drug therapy / Q000201:enzymology / Q000235:genetics / Q000276:immunology* / Q000401:mortality; D012074:Remission Induction; D015996:Survival Rate
chemical_list: D015703:Antigens, CD; D018952:Antigens, CD34; D000943:Antigens, Differentiation; D007770:L-Lactate Dehydrogenase