title: The bcl-2 gene is rearranged in many diffuse B-cell lymphomas.
abstract: Southern blotting was used to detect rearrangement of the bcl-2 gene in 104 cases of non-Hodgkin's lymphoma subclassified by the Working Formulation, 24 cases of B cell chronic lymphocytic leukemia (B-CLL) and 14 cases of T cell malignancy. Earlier workers reported rearrangement of this gene (located on chromosome 18) in a major fraction of follicular lymphomas, lymphomas in which a 14;18 chromosome translocation is frequently observed. In the present study, bcl-2 was rearranged in 30% (11 of 37) of follicular lymphomas and 19% (11 of 58) of diffuse lymphomas of follicle center cell lineage. In 18 of 19 samples studied, the rearranged bcl-2 fragment also hybridized with a probe for the joining region of the immunoglobulin heavy chain gene located on chromosome 14, indicating a 14;18 translocation. In lymphomas not derived from follicle center cells, ie, diffuse lymphomas of small B lymphocytes, B-CLL and T cell neoplasms, the bcl-2 gene was always in germline configuration. The frequent rearrangement of bcl-2 in a variety of B cell lymphomas of diffuse morphology (small cleaved cell, large cell, small noncleaved cell and immunoblastic) is noteworthy.
authors.affiliation: Department of Medicine, Massachusetts General Hospital, Boston 02114.
authors.forename: A C
authors.initials: AC
authors.lastname: Aisenberg
authors.forename: B M
authors.initials: BM
authors.lastname: Wilkes
authors.forename: J O
authors.initials: JO
authors.lastname: Jacobson
mesh_terms: D000328:Adult; D000951:Antigens, Neoplasm / Q000032:analysis; D000954:Antigens, Surface / Q000032:analysis; D001402:B-Lymphocytes / Q000276:immunology / Q000378:metabolism* / Q000473:pathology; D002887:Chromosomes, Human, Pair 18; D005803:Genes, Immunoglobulin; D006801:Humans; D007143:Immunoglobulin Heavy Chains / Q000235:genetics; D008228:Lymphoma, Non-Hodgkin / Q000235:genetics* / Q000276:immunology / Q000473:pathology; D015260:Neprilysin; D009857:Oncogenes; D014178:Translocation, Genetic
chemical_list: D000951:Antigens, Neoplasm; D000954:Antigens, Surface; D007143:Immunoglobulin Heavy Chains; D015260:Neprilysin