title: Analysis of Epstein-Barr virus strains and variants in classical Hodgkin's lymphoma by laser microdissection.
abstract: Epstein-Barr virus (EBV) seems to have an etiological role in the pathogenesis of classical Hodgkin's lymphoma (cHL). Studies of whole tissue DNA by polymerase-chain reaction (PCR) have shown a considerable number of cHL cases with co-infections by different EBV strains and variants, which apparently contradict the clonality of EBV in cHL previously demonstrated by Southern blot analysis. Due to the paucity of HRS cells in HL tissues, studies on single cell DNA are necessary to identify the specific cellular location (HRS cells and/or bystander B lymphocytes) of the EBV strains and variants present in tissue specimens. In the current study, the presence of EBV was determined by PCR of the 3' end of the LMP-1 gene and EBNA-3C gene in whole tissue and, consecutively, in isolated cells from 26 cases of cHL: 10 HIV-positive and 16 sporadic cHL cases. EBV EBERs were present in all but 2 sporadic cHL cases, which were used as negative controls. At isolated cell level, EBNA-3C gene PCR was more sensitive. Indeed, from the cHL cases in which dual-infection was present, it was observed that, in most of them, HRS cells were infected by type 1 virus, and B lymphocytes were co-infected by both types, which points towards EBV infection occurring early in cHL development. Moreover, the finding of 2 cases with dual-infection in HRS may suggest that, in a small percentage of cHL cases, HRS cells derive from different neoplastic clones, or that HRS cells are superinfected by other viral types after the establishment of the neoplastic clone.
authors.affiliation: Department of Pathology, Hospital Universitario Ramón y Cajal, Madrid, Spain.
authors.forename: Mónica
authors.initials: M
authors.lastname: García-Cosío
authors.forename: Almudena
authors.initials: A
authors.lastname: Santón
authors.forename: Paloma
authors.initials: P
authors.lastname: Martín
authors.forename: Maria Eugenia
authors.initials: ME
authors.lastname: Reguero
authors.forename: Eva
authors.initials: E
authors.lastname: Cristóbal
authors.forename: Carmen
authors.initials: C
authors.lastname: Bellas
mesh_terms: D000956:Antigens, Viral / Q000032:analysis; D015897:Comorbidity; D020031:Epstein-Barr Virus Infections / Q000150:complications* / Q000401:mortality / Q000473:pathology; D019309:Epstein-Barr Virus Nuclear Antigens; D006679:HIV Seropositivity; D004854:Herpesvirus 4, Human / Q000235:genetics / Q000302:isolation & purification* / Q000472:pathogenicity; D006689:Hodgkin Disease / Q000401:mortality / Q000473:pathology / Q000821:virology*; D006801:Humans; D017403:In Situ Hybridization; D007834:Lasers; D042282:Microdissection / Q000379:methods*; D009367:Neoplasm Staging; D016133:Polymerase Chain Reaction; D016601:RNA-Binding Proteins / Q000032:analysis; D012269:Ribosomal Proteins / Q000032:analysis; D013030:Spain / Q000453:epidemiology; D015996:Survival Rate; D014763:Viral Matrix Proteins / Q000032:analysis
chemical_list: D000956:Antigens, Viral; C498774:EBNA-3C, epstein-barr virus; C037662:EBV-associated membrane antigen, Epstein-Barr virus; D019309:Epstein-Barr Virus Nuclear Antigens; D016601:RNA-Binding Proteins; D012269:Ribosomal Proteins; D014763:Viral Matrix Proteins; C067169:RPL22 protein, human