2015, Number S2
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ABSTRACTHigh-risk human papillomaviruses (HR-HPV), as HPV-16, evade immune recognition through the inactivation of cells of the innate immune response. HPV-16 E6 and E7 genes down-regulate type I interferon response. They do not produce viremia or cell death; therefore, they do not cause inflammation or damage signal that alerts the immune system. Virus-like particles (VLPs), consisting of structural proteins (L1 and L2) of the main HR-HPV types that infect the genitourinary tract, are the most effective prophylactic vaccines against HR-HPV infection. While for the high grade neoplastic lesions, therapeutic vaccines based on viral vectors, peptides, DNA or complete HR-HPV E6 and E7 proteins as antigens, have had limited effectiveness. Chimeric virus-like particles (cVLPs) that carry immunogenic peptides derived from E6 and E7 viral proteins, capable to induce activation of specific cytotoxic T lymphocytes, emerge as an important alternative to provide prophylactic and therapeutic activity against HR-HPV infection and cervical cancer.
Paz de la Rosa G, Monroy-García A, Mora-García MD, Reynaga-Peña CG, Hernandez-Montes J, Weiss- Steider B, et al. An HPV 16 L1-based chimeric human papilloma virus-like particles containing a string of epitopes produced in plants is able to elicit humoral and cytotoxic T-cell activity in mice. Virol J. 2009;6:2.
Monroy-García A, Gómez-Lim MA, Weiss-Steider B, Hernández-Montes J, Huerta-Yepez S, Rangel- Santiago JF, et al. Immunization with an HPV-16 L1 based chimeric virus-like particle containing HPV-16 E6 and E7 epitopes elicits long-lasting prophylactic and therapeutic efficacy in an HPV-16 tumor mice model. Arch Virol. 2014;59:291:305.