Cationic influenza virosomes as an adjuvanted delivery system for CTL induction by DNA vaccination

Abbas Jamali, Marijke Holtrop, Aalzen de Haan, Hamidreza Hashemi, Mohammad Shenagari, Arash Memarnejadian, Farzin Roohvand, Farzaneh Sabahi, Masumeh Tavassoti Kheiri, Anke Huckriede*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)

Abstract

DNA vaccines have emerged as an attractive approach to induce CTL responses against cancer and infectious agents in recent years. Although CTL induction by DNA vaccination would be a valuable strategy for controlling viral infections, increasing the potency of DNA vaccines is mandatory before DNA vaccines can make it to the clinic. In this study, we developed and characterized a new and safe adjuvanted delivery system for DNA vaccination using cationic influenza virosomes (CIV). CIV were produced by reconstitution of detergent-solubilized influenza virus membranes in the presence of cationic lipids. Plasmid DNA (pDNA) mixed with these virosomes was efficiently transfected into cells of a mouse macrophage cell line (RAW-Blue cells). Moreover, the cells were effectively activated as demonstrated by production of an NF kappa B/AP-1-inducible reporter enzyme. Following three intradermal immunizations, CIV-delivered epitope-encoding pDNA induced equal numbers of IFN gamma- and granzyme B-producing T cells than a 10-fold higher dose of naked pDNA. Virosomes without cationic lipids also improved induction of cellular immunity by pDNA but to a significantly lower extent than CIV. These findings suggest that pDNA-CIV complexes could be an efficacious delivery system suitable for CTL induction by DNA vaccination. (C) 2012 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)77-82
Number of pages6
JournalImmunology Letters
Volume148
Issue number1
DOIs
Publication statusPublished - 2012

Keywords

  • DNA vaccines
  • Cationic influenza virosomes
  • CTL responses
  • Adjuvant
  • IN-VIVO TRANSFECTION
  • HEPATITIS-C VIRUS
  • IMMUNE-RESPONSES
  • CELL RESPONSES
  • GENE-THERAPY
  • PLASMID DNA
  • VACCINES
  • ANTIGEN
  • IMMUNIZATION
  • PROSPECTS

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