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Open Access Effects of Route of Inoculation and Viral Genetic Variation on Antibody Responses to Polyomavirus SV40 in Syrian Golden Hamsters

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Genetic variants of polyomavirus SV40 are powerful agents with which to define viral effects on cells and carcinogenesis pathways. We hypothesized that differences in biologic variation among viral strains affect the process of viral infection and are reflected in antibody responses to the viral nonstructural large T-antigen (TAg) protein but not in neutralizing antibody responses against the inoculated viral particles. We analyzed the production of TAg antibody and neutralizing antibody in Syrian golden hamsters that were inoculated with SV40 viral strains by intracardiac, intravenous, or intraperitoneal routes and remained tumor free. Compared with the intraperitoneal route, intravascular (that is, intravenous, intracardiac) inoculation resulted in increased frequency of responsiveness to TAg but not in higher TAg antibody titers. The intravascular route was superior both for eliciting neutralizing antibody responses and for higher titers of those responses. Viruses with complex regulatory regions induced TAg antibody more often than did viruses with simple regulatory regions after intraperitoneal but not intravascular injections, with no differences in antibody titers. This viral genetic variation had no effect on neutralizing antibody production after intraperitoneal or intravascular inoculations or on neutralizing antibody titers achieved. These findings confirm that SV40 variants differ in their biologic properties. Route of inoculation combined with viral genetic variation significantly influence the development of serum antibodies to SV40 TAg in tumor-free hamsters. Route of inoculation—but not viral genetic variation—is an important factor in production of neutralizing antibody to SV40.

Document Type: Research Article

Affiliations: 1: Center for Comparative Medicine, Baylor College of Medicine, Houston, Texas, USA 2: Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA; Institute of Hematology and Blood Transfusion, Prague, Czech Republic 3: Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA 4: Center for Comparative Medicine, Department of Pathology and Immunology, Baylor College of Medicine, Houston, Texas, USA 5: Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA 6: Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA.

Publication date: 2012-10-01

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  • Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.

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