title: Polyoma tumor development in neonatally polyoma-virus-infected CD4-/- and CD8-/- single knockout and CD4-/-8-/- double knockout mice.
abstract: CD4-/- or CD8-/- single knockout as well as CD4-/-8-/- double knockout mice were infected with polyoma virus as newborns or 1 week after birth. The animals were followed for tumor development and virus persistence. Double knockout mice developed tumors at a higher incidence (29%) than either the CD8-/- or CD4-/- single knockout mice (11% and 2%, respectively). Persistence of polyoma virus was examined by PCR in one third of all animals included in the study. Seven of the 17 CD4-/-8-/- double knockout mice gave positive evidence of virus persistence up to 6 months p.i. where virus DNA was present in most organs. Corresponding tests in single knockout mice gave positive results of persistent viral DNA in 2 of the 19 CD8-/-and 2 of the 7 CD4-/-mice. In the single knockout mice polyoma DNA could only be detected in a more limited variety of organs compared to the double knockouts.
authors.affiliation: Division of Clinical Virology, Karolinska Institute, Huddinge University Hospital, Sweden.
authors.forename: Z
authors.initials: Z
authors.lastname: Berke
authors.forename: T
authors.initials: T
authors.lastname: Wen
authors.forename: G
authors.initials: G
authors.lastname: Klein
authors.forename: T
authors.initials: T
authors.lastname: Dalianis
mesh_terms: D000818:Animals; D001483:Base Sequence; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology*; D004279:DNA, Viral / Q000032:analysis; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D008969:Molecular Sequence Data; D009374:Neoplasms, Experimental / Q000276:immunology* / Q000517:prevention & control / Q000821:virology*; D030361:Papillomavirus Infections / Q000276:immunology* / Q000517:prevention & control* / Q000821:virology; D011120:Polyomavirus / Q000235:genetics*; D014412:Tumor Virus Infections / Q000276:immunology* / Q000517:prevention & control* / Q000821:virology
chemical_list: D004279:DNA, Viral