title: Epstein-Barr virus BHRF1 gene but not the cellular protooncogene bcl-2 is expressed in ataxia-telangiectasia lymphoblastoid lines.
abstract: The expression of both the Epstein-Barr virus (EBV) ORF BHRF1 and the cellular protooncogene bcl-2 was studied in EBV-transformed lymphoblastoid B cells from patients with the human genetic disorder ataxia-telangiectasia (A-T). Using the Northern blot technique, it was found that the pattern of transcription of the BHRF1 gene in A-T lymphoblastoids resembled that in EBV-transformed normal lymphoblastoid lines and Burkitt lymphoma (BL) lymphocytes. However, the 1.5-kb mature BHRF1 mRNA species present in normal lymphoblastoid cells and in BL cells was not found in the A-T lymphoblastoid cell lines. Treatment of the A-T lymphoblastoid lines with phorbol ester caused changes in the pattern of the synthesis and quantity of BHRF1-related RNA transcripts. The bcl-2 protooncogene probe did not detect bcl-2-related mRNA in the A-T lymphoblastoid lines.
authors.affiliation: Department of Molecular Virology, Faculty of Medicine, Hebrew University of Jerusalem, Israel.
authors.forename: Y
authors.initials: Y
authors.lastname: Becker
authors.forename: E
authors.initials: E
authors.lastname: Tabor
authors.forename: Y
authors.initials: Y
authors.lastname: Asher
mesh_terms: D001260:Ataxia Telangiectasia; D001402:B-Lymphocytes; D002460:Cell Line; D004279:DNA, Viral / Q000235:genetics; D005814:Genes, Viral; D004854:Herpesvirus 4, Human / Q000235:genetics*; D006801:Humans; D016366:Open Reading Frames; D011487:Protein Conformation; D011505:Protein-Tyrosine Kinases / Q000235:genetics; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D019253:Proto-Oncogene Proteins c-bcl-2; D011519:Proto-Oncogenes; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D014158:Transcription, Genetic / Q000187:drug effects; D014764:Viral Proteins / Q000235:genetics*
chemical_list: D004279:DNA, Viral; D011518:Proto-Oncogene Proteins; D019253:Proto-Oncogene Proteins c-bcl-2; D014764:Viral Proteins; D011505:Protein-Tyrosine Kinases; D013755:Tetradecanoylphorbol Acetate