DNA prime-protein boost increased the titer, avidity and persistence of anti-AΒ antibodies in wild-type mice

H. Davtyan, M. Mkrtichyan, N. Movsesyan, I. Petrushina, G. Mamikonyan, D. H. Cribbs, M. G. Agadjanyan, A. Ghochikyan

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


Recently, we reported that a DNA vaccine, composed of three copies of a self B cell epitope of amyloid-Β (AΒ 42) and the foreign T-cell epitope, Pan DR epitope (PADRE), generated strong anti-AΒ immune responses in wild-type and amyloid precursor protein transgenic animals. Although DNA vaccines have several advantages over peptide-protein vaccines, they induce lower immune responses in large animals and humans compared with those in mice. The focus of this study was to further enhance anti-AΒ 11 immune responses by developing an improved DNA vaccination protocol of the prime-boost regimen, in which the priming step would use DNA and the boosting step would use recombinant protein. Accordingly, we generated DNA and recombinant protein-based epitope vaccines and showed that priming with DNA followed by boosting with a homologous recombinant protein vaccine significantly increases the anti-AΒ antibody responses and do not change the immunoglobulin G1 (IgG1) profile of humoral immune responses. Furthermore, the antibodies generated by this prime-boost regimen were long-lasting and possessed a higher avidity for binding with an AΒ 42 peptide. Thus, we showed that a heterologous prime-boost regimen could be an effective protocol for developing a potent Alzheimer's disease (AD) vaccine.

Original languageEnglish (US)
Pages (from-to)261-271
Number of pages11
JournalGene Therapy
Issue number2
StatePublished - Feb 2010
Externally publishedYes


  • DNA vaccine
  • Prime-boost regimen
  • Β-amyloid

ASJC Scopus subject areas

  • Molecular Medicine
  • Molecular Biology
  • Genetics


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