title: B-cell lymphomagenesis in SIV-immunosuppressed cynomolgus monkeys.
abstract: B-cell lymphomas developed frequently (approx. 40%) in SIVsm (SMM3) immunosuppressed monkeys and were mostly extranodal, aggressive and all associated with an EBV-related simian herpes virus operationally designated herpes virus Macaca fascicularis (HVMF-I). Lymphoma tissues from 21 monkeys were studied by PCR and DNA PAGE for mono/oligoclonality of the VDJ-rearranged IgH genes. Most lymphomas (n = 15) showed a monoclonal and approximately 1/3 (n = 6) an oligoclonal VDJ rearrangement pattern. The time after infection to tumor presentation was significantly shorter for oligoclonal than for monoclonal lymphomas, suggesting that oligoclonal selection frequently precedes the outgrowth of a single malignant clone. Comparison of the VDJ rearrangements in an established lymphoma cell line and the original, oligoclonal lymphoma tissue indicated in vitro selection of one HVMF-infected clone. Longitudinal studies of sequential lymph-node biopsies showed that the malignant lymphoma clone in 3 out of 8 lymphomas could be identified as a predominant clone in lymph nodes 2-12 months after SIV infection and 6-10 months before clinical presentation of the lymphomas. VDJ-rearranged DNA corresponding to that of the lymphomas was also detected in most sera at the time of lymphoma manifestation but not in corresponding PBL preparations. Clearly, the SIVsm AIDS model in cynomolgus monkeys represents a powerful tool for biological and clinical studies of herpes-virus-associated lymphomagenesis in immunosuppressed states.
authors.affiliation: Immunopathology Laboratory, Karolinska Institute, Stockholm, Sweden.
authors.forename: S
authors.initials: S
authors.lastname: Rezikyan
authors.forename: E E
authors.initials: EE
authors.lastname: Kaaya
authors.forename: M
authors.initials: M
authors.lastname: Ekman
authors.forename: A F
authors.initials: AF
authors.lastname: Voevodin
authors.forename: H
authors.initials: H
authors.lastname: Feichtinger
authors.forename: P
authors.initials: P
authors.lastname: Putkonen
authors.forename: E
authors.initials: E
authors.lastname: Castaños-Velez
authors.forename: G
authors.initials: G
authors.lastname: Biberfeld
authors.forename: P
authors.initials: P
authors.lastname: Biberfeld
mesh_terms: D000818:Animals; D001483:Base Sequence; D001706:Biopsy; D002522:Chlorocebus aethiops; D004273:DNA, Neoplasm / Q000032:analysis; D015322:Gene Rearrangement, B-Lymphocyte; D005803:Genes, Immunoglobulin; D006564:Herpesviridae / Q000235:genetics; D004854:Herpesvirus 4, Human / Q000235:genetics; D006801:Humans; D016867:Immunocompromised Host; D017403:In Situ Hybridization; D008198:Lymph Nodes / Q000473:pathology; D016393:Lymphoma, B-Cell / Q000235:genetics / Q000276:immunology* / Q000821:virology*; D008252:Macaca fascicularis; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D012367:RNA, Viral / Q000032:analysis; D016601:RNA-Binding Proteins / Q000235:genetics; D012680:Sensitivity and Specificity; D016097:Simian Acquired Immunodeficiency Syndrome / Q000150:complications* / Q000276:immunology*; D015302:Simian Immunodeficiency Virus / Q000276:immunology*; D014709:Vero Cells
chemical_list: D004273:DNA, Neoplasm; D012367:RNA, Viral; D016601:RNA-Binding Proteins