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    The Journal of investigative dermatology. 2013 May 10. pii: jid2013253. doi: 10.1038/jid.2013.253. pmc: PMC3826974. mid: EMS54966
    Efficacy of RG1-VLP vaccination against infections with genital and cutaneous human papillomaviruses.
    Schellenbacher C1,  Kwak K,  Fink D,  Shafti-Keramat S,  Huber B,  Jindra C,  Faust H,  Dillner J,  Roden RB,  Kirnbauer R
    Author information
    1Laboratory of Viral Oncology (LVO), Division of Immunology, Allergy and Infectious Diseases (DIAID), Department of Dermatology, Medical University Vienna (MUW), Vienna, Austria.
    Abstract

    Licensed human papillomavirus (HPV) vaccines, based on virus-like particles (VLPs) self-assembled from major capsid protein L1, afford type-restricted protection against HPV types 16/18/6/11 (or 16/18 for the bivalent vaccine), which cause 70% of cervical cancers (CxCas) and 90% of genital warts. However, they do not protect against less prevalent high-risk (HR) types causing 30% of CxCa, or cutaneous HPV. In contrast, vaccination with the minor capsid protein L2 induces low-level immunity to type-common epitopes. Chimeric RG1-VLP presenting HPV16 L2 amino acids 17-36 (RG1 epitope) within the DE-surface loop of HPV16 L1 induced cross-neutralizing antisera. We hypothesized that RG1-VLP vaccination protects against a large spectrum of mucosal and cutaneous HPV infections in vivo. Immunization with RG1-VLP adjuvanted with human-applicable alum-MPL (aluminum hydroxide plus 3-O-desacyl-4'-monophosphoryl lipid A) induced robust L2 antibodies (ELISA titers 2,500-12,500), which (cross-)neutralized mucosal HR HPV16/18/45/37/33/52/58/35/39/51/59/68/73/26/69/34/70, low-risk HPV6/11/32/40, and cutaneous HPV2/27/3/76 (titers 25-1,000) using native virion- or pseudovirion (PsV)-based assays, and a vigorous cytotoxic T lymphocyte response by enzyme-linked immunospot. In vivo, mice were efficiently protected against experimental vaginal challenge with mucosal HR PsV types HPV16/18/45/31/33/52/58/35/39/51/59/68/56/73/26/53/66/34 and low-risk HPV6/43/44. Enduring protection was demonstrated 1 year after vaccination. RG1-VLP is a promising next-generation vaccine with broad efficacy against all relevant mucosal and also cutaneous HPV types.


    Publikations ID: 23752042
    Quelle: öffnen
     
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