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Strain-Specific Properties and T Cells Regulate the Susceptibility to Papilloma Induction by Papillomavirus 1


Infection with papillomaviruses can cause benign warts (papillomas) on skin and mucosae of humans and animals but also malignancies, especially anogenital carcinomas and, in genetically predisposed or immunocompromised individuals, cutaneous squamous cell cancers. Control and clearance of these viruses are thought to be mediated by the cellular immune system, however experimental determination for the necessary cellular effector(s) is lacking. The recently identified mouse papillomavirus (MusPV1, also designated “MmuPV1”) is known to induce papilloma formation on skin of immunodeficient mice. However, its pathogenesis in immunocompetent mice is unclear. Our study shows that in an immunocompetent setting, MusPV1 generally causes asymptomatic skin infections, but no lesion outgrowth. Visible papillomas were consistently observed after profound immunosuppression in some, but not other, strains of mice. By selective removal of distinct cellular immune populations and employing genetically modified mice, we could show that T cells are pivotal for controlling MusPV1 infection and disease. We further show that surprising differences in the T cell subsets are required for protection in different strains of immunocompetent mice. This implies that unanticipated effector mechanisms can control virus infection and pathogenesis in specific genetic backgrounds. The findings may help to explain the wide of range of pathologic outcomes of infection by a specific human papillomavirus type in immunocompetent people.


Vyšlo v časopise: Strain-Specific Properties and T Cells Regulate the Susceptibility to Papilloma Induction by Papillomavirus 1. PLoS Pathog 10(8): e32767. doi:10.1371/journal.ppat.1004314
Kategorie: Research Article
prolekare.web.journal.doi_sk: https://doi.org/10.1371/journal.ppat.1004314

Souhrn

Infection with papillomaviruses can cause benign warts (papillomas) on skin and mucosae of humans and animals but also malignancies, especially anogenital carcinomas and, in genetically predisposed or immunocompromised individuals, cutaneous squamous cell cancers. Control and clearance of these viruses are thought to be mediated by the cellular immune system, however experimental determination for the necessary cellular effector(s) is lacking. The recently identified mouse papillomavirus (MusPV1, also designated “MmuPV1”) is known to induce papilloma formation on skin of immunodeficient mice. However, its pathogenesis in immunocompetent mice is unclear. Our study shows that in an immunocompetent setting, MusPV1 generally causes asymptomatic skin infections, but no lesion outgrowth. Visible papillomas were consistently observed after profound immunosuppression in some, but not other, strains of mice. By selective removal of distinct cellular immune populations and employing genetically modified mice, we could show that T cells are pivotal for controlling MusPV1 infection and disease. We further show that surprising differences in the T cell subsets are required for protection in different strains of immunocompetent mice. This implies that unanticipated effector mechanisms can control virus infection and pathogenesis in specific genetic backgrounds. The findings may help to explain the wide of range of pathologic outcomes of infection by a specific human papillomavirus type in immunocompetent people.


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Štítky
Hygiena a epidemiológia Infekčné lekárstvo Laboratórium

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