TY - JOUR
T1 - β2-microglobulin knockout mice are highly susceptible to polyoma virus tumorigenesis
AU - Drake, Donald R.
AU - Lukacher, Aron E.
N1 - Funding Information:
We would like to thank Jeffrey Actor for his assistance in designing primer sets for the RT-PCR bioluminescence immunoassay. The excellent technical assistance of Jennifer Smith in preparing and staining tissue sections and Bob Santoianni in photomicroscopy is greatly appreciated. This work was supported by National Institutes of Health Grant CA71971 and in part by grants from the University Research Committee of Emory University, the American Cancer Society, Inc., and the Winship Cancer Center of Emory University.
PY - 1998/12/5
Y1 - 1998/12/5
N2 - Polyoma virus is highly oncogenic when inoculated into immunocompromised adult mice and neonatal mice of specific inbred strains. Although T lymphocytes are known to be essential in controlling polyoma virus tumorigenesis, the importance of class I MHC-restricted CD8+ T cells in mediating tumor resistance remains unclear. Here, we investigated the tumorigenicity of polyoma virus in adult mice rendered CD8+ T cell-deficient by homozygous (-/-) disruption of the β2-microglobulin (β2m) or CD8α (CD8) genes. Nearly all (94%) of the virus-infected adult C57BL/6β2m(-/-) mice developed tumors, and 20% of the virus-inoculated adult C57BL/6CD8(-/-) mice developed hindlimb paralysis, which is indicative of vertebral tumors. Only 2 of 20 virus-inoculated adult normal C57BL/6 mice developed tumors. Despite these different tumor susceptibilities, persistent viral DNA was detected in multiple organs of mice of all three strains. Multifocal lymphoplasmacytic interstitial infiltrates were present in the kidneys and lungs of virus-infected C57BL/6β2m(-/-) and in the lungs of virus- inoculated C57BL/6CD8(-/-) mice. These infiltrates were corn posed primarily of B cells and colocalized with staining for the major vital capsid protein, VP1. No infiltrates or VP1 staining was detected in the kidneys of infected C57BL/6 mice. Using a highly sensitive RT-PCR bioluminescence immunoassay, we investigated and detected persistent polyoma T protein and VP1 messages in both C57BL/6β2m(-/-) and C57BL/6 mice. C57BL/6β2m(-/-) and C57BL/6 mice had equivalent serum virus-neutralizing antibody titers. These results provide in vivo evidence that class I MHC-restricted CD8+ T cells are involved in mediating protection against polyoma virus tumor development.
AB - Polyoma virus is highly oncogenic when inoculated into immunocompromised adult mice and neonatal mice of specific inbred strains. Although T lymphocytes are known to be essential in controlling polyoma virus tumorigenesis, the importance of class I MHC-restricted CD8+ T cells in mediating tumor resistance remains unclear. Here, we investigated the tumorigenicity of polyoma virus in adult mice rendered CD8+ T cell-deficient by homozygous (-/-) disruption of the β2-microglobulin (β2m) or CD8α (CD8) genes. Nearly all (94%) of the virus-infected adult C57BL/6β2m(-/-) mice developed tumors, and 20% of the virus-inoculated adult C57BL/6CD8(-/-) mice developed hindlimb paralysis, which is indicative of vertebral tumors. Only 2 of 20 virus-inoculated adult normal C57BL/6 mice developed tumors. Despite these different tumor susceptibilities, persistent viral DNA was detected in multiple organs of mice of all three strains. Multifocal lymphoplasmacytic interstitial infiltrates were present in the kidneys and lungs of virus-infected C57BL/6β2m(-/-) and in the lungs of virus- inoculated C57BL/6CD8(-/-) mice. These infiltrates were corn posed primarily of B cells and colocalized with staining for the major vital capsid protein, VP1. No infiltrates or VP1 staining was detected in the kidneys of infected C57BL/6 mice. Using a highly sensitive RT-PCR bioluminescence immunoassay, we investigated and detected persistent polyoma T protein and VP1 messages in both C57BL/6β2m(-/-) and C57BL/6 mice. C57BL/6β2m(-/-) and C57BL/6 mice had equivalent serum virus-neutralizing antibody titers. These results provide in vivo evidence that class I MHC-restricted CD8+ T cells are involved in mediating protection against polyoma virus tumor development.
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U2 - 10.1006/viro.1998.9455
DO - 10.1006/viro.1998.9455
M3 - Article
C2 - 9875336
AN - SCOPUS:0032488260
SN - 0042-6822
VL - 252
SP - 275
EP - 284
JO - Virology
JF - Virology
IS - 1
ER -