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  • Title: Human papillomavirus (HPV) types specific of epidermodysplasia verruciformis detected in warts induced by HPV3 or HPV3-related types in immunosuppressed patients.
    Author: Obalek S, Favre M, Szymanczyk J, Misiewicz J, Jablonska S, Orth G.
    Journal: J Invest Dermatol; 1992 Jun; 98(6):936-41. PubMed ID: 1317396.
    Abstract:
    Epidermodysplasia verruciformis (EV) is characterized by an abnormal genetic predisposition to infection with specific types of human papillomavirus (HPV). Specific defects of the cell-mediated immunity and/or of the control of HPV infection in keratinocytes are assumed to be involved in the development of the disease. As a model to test this hypothesis, we have studied the prevalence of EV-specific HPV in skin warts of 56 immunosuppressed patients. All main types of cutaneous HPV (HPV1, 2, 3, 4, 10, and 28) responsible for skin warts in the general population were detected by blot hybridization. EV-specific HPV (HPV5, 20, and 23) were detected in three patients. Four additional patients were found infected with HPV49, first characterized in the course of this study, and found to be related to EV HPV. A most important finding was that HPV5, 20, 23, and 49 were always codetected with HPV3 or the related types HPV10 and 28. None of the specimens showed the typical clinical morphology of EV lesions. In none of these specimens was the specific cytopathic effect of EV recognized; instead that of HPV3 and related types was seen. No evidence for productive EV HPV DNA replication was obtained for the three specimens that could be further analyzed by in situ hybridization. Our data suggest that HPV3 infection favors infection with EV HPV in immunosuppressed patients but that the full expression of EV HPV is usually restricted as in the general population.
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