title: Limited infection without evidence of replication by porcine endogenous retrovirus in guinea pigs.
abstract: Porcine endogenous retrovirus (PERV) may potentially be transmitted through porcine xenotransplantation products administered to humans. This study examined the feasibility of using guinea pigs as a model to characterize the in vivo infectivity of PERV. To enhance the susceptibility of guinea pigs to retroviral infection or genomic integration, moderate physiological or immunological changes were induced prior to exposing the animals to PERV. Quantitative PERV-specific PCR performed on all tested samples resulted in either undetectable or very low copy numbers of proviruses, even in animals possessing PERV-specific antibody responses. The low copy number of viral DNA detected suggests that PERV infected a limited number of cells. However, PERV DNA levels did not increase over time, suggesting no virus replication occurred. These results in the guinea pig are similar to previous observations of non-human primate cells that allow PERV infection but do not support PERV replication in vitro.
authors.affiliation: Laboratory of Immunology and Virology, Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, Food and Drug Administration, 8800 Rockville Pike, HFM-725, Bethesda, MD 20892, USA.
authors.forename: Takele
authors.initials: T
authors.lastname: Argaw
authors.affiliation: Laboratory of Immunology and Virology, Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, Food and Drug Administration, 8800 Rockville Pike, HFM-725, Bethesda, MD 20892, USA.
authors.forename: Winston
authors.initials: W
authors.lastname: Colon-Moran
authors.affiliation: Laboratory of Immunology and Virology, Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, Food and Drug Administration, 8800 Rockville Pike, HFM-725, Bethesda, MD 20892, USA.
authors.forename: Carolyn A
authors.initials: CA
authors.lastname: Wilson
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D004279:DNA, Viral / Q000032:analysis; D020077:Endogenous Retroviruses / Q000187:drug effects / Q000276:immunology / Q000472:pathogenicity* / Q000502:physiology; D006168:Guinea Pigs / Q000821:virology*; D022781:Hepatocytes / Q000187:drug effects; D016133:Polymerase Chain Reaction; D020005:Propanols / Q000494:pharmacology; D012192:Retroviridae Infections / Q000503:physiopathology / Q000821:virology*; D013556:Swine, Miniature / Q000821:virology*; D014779:Virus Replication
chemical_list: D000914:Antibodies, Viral; D004279:DNA, Viral; D020005:Propanols; C006463:allyl alcohol