title: [B-CLL and bcl-2 gene].
abstract: Most of human follicular lymphomas (approximately 90% in U.S.A. or approximately 30% in Japan) possess the t(14; 18) chromosome translocation that directly involves the IgH locus on chromosome 14 and the bcl-2 gene on chromosome 18. The t(14; 18) chromosome translocation occurs nearly exclusively at two hot spots, a major breakpoint clustering region (mbr) within the 2nd exon noncoding region and the minor breakpoint clustering region (mcr) within the 3' flanking region of the bcl-2 gene. Here we show that the rearrangement of the bcl-2 gene occurs in a significant fraction (approximately 10%) of B-CLL. All of the rearranged bcl-2 genes were juxtaposed with Ig lambda or Ig kappa genes, implying that the bcl-2 gene is preferentially linked to the IgL genes in CLL.
authors.affiliation: First Department of Internal Medicine, Sapporo Medical College.
authors.forename: M
authors.initials: M
authors.lastname: Adachi
authors.forename: K
authors.initials: K
authors.lastname: Imai
authors.forename: A
authors.initials: A
authors.lastname: Yachi
authors.forename: Y
authors.initials: Y
authors.lastname: Tsujimoto
mesh_terms: D001483:Base Sequence; D015321:Gene Rearrangement; D006801:Humans; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000235:genetics*; D008969:Molecular Sequence Data; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D019253:Proto-Oncogene Proteins c-bcl-2; D011519:Proto-Oncogenes
chemical_list: D011518:Proto-Oncogene Proteins; D019253:Proto-Oncogene Proteins c-bcl-2