Vaccination with human papillomavirus pseudovirus-encapsidated plasmids targeted to skin using microneedles

PLoS One. 2015 Mar 18;10(3):e0120797. doi: 10.1371/journal.pone.0120797. eCollection 2015.

Abstract

Human papilloma virus-like particles (HPV VLP) serve as the basis of the current licensed vaccines for HPV. We have previously shown that encapsidation of DNA expressing the model antigen M/M2 from respiratory syncytial virus (RSV) in HPV pseudovirions (PsV) is immunogenic when delivered intravaginally. Because the HPV capsids confer tropism for basal epithelium, they represent attractive carriers for vaccination targeted to the skin using microneedles. In this study we asked: 1) whether HPV16 VLP administered by microneedles could induce protective immune responses to HPV16 and 2) whether HPV16 PsV-encapsidated plasmids delivered by microneedles could elicit immune responses to both HPV and the antigen delivered by the transgene. Mice immunized with HPV16 VLP coated microneedles generated robust neutralizing antibody responses and were protected from HPV16 challenge. Microneedle arrays coated with HPV16-M/M2 or HPV16-F protein (genes of RSV) were then tested and dose-dependent HPV and F-specific antibody responses were detected post-immunization, and M/M2-specific T-cell responses were detected post RSV challenge, respectively. HPV16 PsV-F immunized mice were fully protected from challenge with HPV16 PsV and had reduced RSV viral load in lung and nose upon intranasal RSV challenge. In summary, HPV16 PsV-encapsidated DNA delivered by microneedles induced neutralizing antibody responses against HPV and primed for antibody and T-cell responses to RSV antigens encoded by the encapsidated plasmids. Although the immunogenicity of the DNA component was just above the dose response threshold, the HPV-specific immunity was robust. Taken together, these data suggest microneedle delivery of lyophilized HPV PsV could provide a practical, thermostable combined vaccine approach that could be developed for clinical evaluation.

Publication types

  • Research Support, N.I.H., Intramural

MeSH terms

  • Administration, Cutaneous
  • Animals
  • Antibodies, Neutralizing / biosynthesis
  • Antibodies, Neutralizing / immunology
  • Antibodies, Viral / biosynthesis
  • Antibodies, Viral / immunology
  • DNA, Viral / genetics
  • DNA, Viral / immunology
  • Female
  • Gene Expression
  • Genes, Reporter
  • Human papillomavirus 16 / drug effects
  • Human papillomavirus 16 / genetics
  • Human papillomavirus 16 / immunology
  • Humans
  • Luciferases / genetics
  • Luciferases / metabolism
  • Mice
  • Microinjections
  • Needles
  • Papillomavirus Infections / immunology
  • Papillomavirus Infections / prevention & control*
  • Papillomavirus Infections / virology
  • Papillomavirus Vaccines / administration & dosage
  • Papillomavirus Vaccines / genetics
  • Papillomavirus Vaccines / immunology*
  • Plasmids / administration & dosage
  • Plasmids / genetics
  • Plasmids / immunology*
  • Respiratory Syncytial Viruses / genetics
  • Respiratory Syncytial Viruses / immunology
  • Skin / immunology*
  • Transgenes
  • Uterine Cervical Neoplasms / immunology
  • Uterine Cervical Neoplasms / prevention & control*
  • Uterine Cervical Neoplasms / virology
  • Vaccination*
  • Vaccines, Virus-Like Particle / administration & dosage
  • Vaccines, Virus-Like Particle / genetics
  • Vaccines, Virus-Like Particle / immunology
  • Viral Fusion Proteins / administration & dosage
  • Viral Fusion Proteins / genetics
  • Viral Fusion Proteins / immunology
  • Viral Matrix Proteins / administration & dosage
  • Viral Matrix Proteins / genetics
  • Viral Matrix Proteins / immunology

Substances

  • Antibodies, Neutralizing
  • Antibodies, Viral
  • DNA, Viral
  • Papillomavirus Vaccines
  • Vaccines, Virus-Like Particle
  • Viral Fusion Proteins
  • Viral Matrix Proteins
  • Luciferases