title: Restricted expression of Epstein-Barr virus (EBV)-encoded, growth transformation-associated antigens in an EBV- and human herpesvirus type 8-carrying body cavity lymphoma line.
abstract: A body cavity lymphoma-derived cell line (BC1), known to carry both Epstein-Barr virus (EBV) and human herpes virus type 8 (HHV-8; or Kaposi's sarcoma-associated herpesvirus, KSHV), was analysed for the expression of EBV-encoded, growth transformation-associated antigens and cellular phenotype by immunofluorescence staining, Western blotting, RT-PCR and flow cytometry. A similar phenotypic analysis was also performed on another body cavity lymphoma line, BCBL1, that is singly infected with HHV-8. Phenotypically, the two lines were closely similar. Although both lines are known to carry rearranged immunoglobulin genes, they were mostly negative for B-cell surface markers. Both expressed the HHV-8-encoded nuclear antigen (LNA1). Similarly to Epstein-Barr nuclear antigen type 1 (EBNA1), LNA1 was associated with the chromatin in interphase nuclei and the mitotic chromosomes in metaphase. It accumulated in a few well-circumscribed nuclear bodies that did not co-localize with EBNA1. BC1 cells expressed EBNA1, LMP2A and EBV-encoded small RNAs but not EBNA2-6, LMP1 and LMP2B. They were thus similar to type I Burkitt's lymphoma cells and latently infected peripheral B-cells. Analysis of the splicing pattern of the EBNA1-encoding message by RT-PCR showed that BC1 cells used the QUK but not the YUK splice, indicating that the mRNA was initiated from Qp and not from Cp or Wp.
authors.affiliation: Microbiology and Tumour Biology Centre, Karolinska Institute, Stockholm, Sweden. lassze@ki.se
authors.forename: L
authors.initials: L
authors.lastname: Szekely
authors.forename: F
authors.initials: F
authors.lastname: Chen
authors.forename: N
authors.initials: N
authors.lastname: Teramoto
authors.forename: B
authors.initials: B
authors.lastname: Ehlin-Henriksson
authors.forename: K
authors.initials: K
authors.lastname: Pokrovskaja
authors.forename: A
authors.initials: A
authors.lastname: Szeles
authors.forename: A
authors.initials: A
authors.lastname: Manneborg-Sandlund
authors.forename: M
authors.initials: M
authors.lastname: Löwbeer
authors.forename: E T
authors.initials: ET
authors.lastname: Lennette
authors.forename: G
authors.initials: G
authors.lastname: Klein
mesh_terms: D000956:Antigens, Viral / Q000096:biosynthesis / Q000235:genetics; D001402:B-Lymphocytes / Q000276:immunology / Q000821:virology*; D019309:Epstein-Barr Virus Nuclear Antigens / Q000096:biosynthesis / Q000235:genetics; D019084:Fluorescent Antibody Technique, Indirect; D015870:Gene Expression; D015967:Gene Expression Regulation, Viral; D004854:Herpesvirus 4, Human / Q000235:genetics* / Q000276:immunology; D019288:Herpesvirus 8, Human / Q000235:genetics* / Q000276:immunology; D006801:Humans; D007621:Karyotyping; D008223:Lymphoma / Q000821:virology*; D009687:Nuclear Proteins / Q000096:biosynthesis / Q000235:genetics; D010641:Phenotype; D016133:Polymerase Chain Reaction; D012326:RNA Splicing; D014407:Tumor Cells, Cultured; D014763:Viral Matrix Proteins / Q000096:biosynthesis / Q000235:genetics
chemical_list: D000956:Antigens, Viral; C037662:EBV-associated membrane antigen, Epstein-Barr virus; D019309:Epstein-Barr Virus Nuclear Antigens; D009687:Nuclear Proteins; D014763:Viral Matrix Proteins; C109540:latency-associated nuclear antigen