title: The t(14;18) chromosomal translocation and Bcl-2 protein expression in Hodgkin's disease.
abstract: A polymerase chain reaction analysis of biopsy specimens from a total of 52 patients with Hodgkin's disease has revealed the presence of the t(14;18) chromosomal translocation in 14 cases (28%). Twelve involved the major breakpoint region and two included the minor cluster region of the bcl-2 gene. Direct sequencing of the amplified 14q+ junctions from the initial four positive cases (from 21 biopsies) has been previously published and demonstrated the similarity in nature of the break-points to those described in follicular lymphoma and lymphoid hyperplasia. The 52 biopsies have also been studied with a monoclonal antibody to immunolocalize the Bcl-2 protein. In all cases Bcl-2 positivity was observed in the majority of surrounding lymphocytes. However, in 11 cases, positive immunostaining in the Sternberg-Reed cells was also observed. Three of these cases contained the t(14;18) translocation, but 11 cases which were positive for the t(14;18) by PCR did not show Bcl-2 protein staining in the Sternberg-Reed cells. This data confirms the presence of t(14;18) in 28% of biopsies from Hodgkin's disease and demonstrates Bcl-2 protein staining in a variable proportion of Sternberg-Reed cells of some cases.
authors.affiliation: ICRF Department of Medical Oncology, St Bartholomew's Hospital, London, UK.
authors.forename: R K
authors.initials: RK
authors.lastname: Gupta
authors.forename: T A
authors.initials: TA
authors.lastname: Lister
authors.forename: J G
authors.initials: JG
authors.lastname: Bodmer
mesh_terms: D001483:Base Sequence; D001706:Biopsy; D002883:Chromosomes, Human, Pair 14; D002887:Chromosomes, Human, Pair 18; D017931:DNA Primers; D006689:Hodgkin Disease / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D006801:Humans; D007150:Immunohistochemistry; D008969:Molecular Sequence Data; D005810:Multigene Family; D016133:Polymerase Chain Reaction; D011505:Protein-Tyrosine Kinases / Q000096:biosynthesis; D011518:Proto-Oncogene Proteins / Q000032:analysis / Q000096:biosynthesis*; D019253:Proto-Oncogene Proteins c-bcl-2; D014178:Translocation, Genetic
chemical_list: D017931:DNA Primers; D011518:Proto-Oncogene Proteins; D019253:Proto-Oncogene Proteins c-bcl-2; D011505:Protein-Tyrosine Kinases