Functional evaluation of malaria Pfs25 DNA vaccine by in vivo electroporation in olive baboons

Rajesh Kumar, Ruth Nyakundi, Thomas Kariuki, Hastings Ozwara, Onkoba Nyamongo, Godfree Mlambo, Barry Ellefsen, Drew Hannaman, Nirbhay Kumar

Research output: Contribution to journalArticle

Abstract

Plasmodium falciparum Pfs25 antigen, expressed on the surface of zygotes and ookinetes, is one of the leading targets for the development of a malaria transmission-blocking vaccine (TBV). Our laboratory has been evaluating DNA plasmid based Pfs25 vaccine in mice and non-human primates. Previously, we established that in vivo electroporation (EP) delivery is an effective method to improve the immunogenicity of DNA vaccine encoding Pfs25 in mice. In order to optimize the in vivo EP procedure and test for its efficacy in more clinically relevant larger animal models, we employed in vivo EP to evaluate the immune response and protective efficacy of Pfs25 encoding DNA vaccine in nonhuman primates (olive baboons, Papio anubis). The results showed that at a dose of 2.5. mg DNA vaccine, antibody responses were significantly enhanced with EP as compared to without EP resulting in effective transmission blocking efficiency. Similar immunogenicity enhancing effect of EP was also observed with lower doses (0.5. mg and 1. mg) of DNA plasmids. Further, final boosting with a single dose of recombinant Pfs25 protein resulted in dramatically enhanced antibody titers and significantly increased functional transmission blocking efficiency. Our study suggests priming with DNA vaccine via EP along with protein boost regimen as an effective method to elicit potent immunogenicity of malaria DNA vaccines in nonhuman primates and provides the basis for further evaluation in human volunteers.

Original languageEnglish (US)
Pages (from-to)3140-3147
Number of pages8
JournalVaccine
Volume31
Issue number31
DOIs
StatePublished - Jun 28 2013

Fingerprint

Papio anubis
DNA Vaccines
Electroporation
electroporation
recombinant vaccines
Malaria
immune response
Primates
plasmids
Plasmids
Vaccines
dosage
ookinetes
vaccines
Malaria Vaccines
antibodies
Zygote
DNA
mice
Plasmodium falciparum

Keywords

  • DNA vaccine
  • Electroporation
  • Malaria
  • Pfs25
  • Prime boost
  • Transmission blocking vaccine

ASJC Scopus subject areas

  • Immunology and Microbiology(all)
  • Infectious Diseases
  • Public Health, Environmental and Occupational Health
  • veterinary(all)
  • Molecular Medicine

Cite this

Kumar, R., Nyakundi, R., Kariuki, T., Ozwara, H., Nyamongo, O., Mlambo, G., ... Kumar, N. (2013). Functional evaluation of malaria Pfs25 DNA vaccine by in vivo electroporation in olive baboons. Vaccine, 31(31), 3140-3147. https://doi.org/10.1016/j.vaccine.2013.05.006

Functional evaluation of malaria Pfs25 DNA vaccine by in vivo electroporation in olive baboons. / Kumar, Rajesh; Nyakundi, Ruth; Kariuki, Thomas; Ozwara, Hastings; Nyamongo, Onkoba; Mlambo, Godfree; Ellefsen, Barry; Hannaman, Drew; Kumar, Nirbhay.

In: Vaccine, Vol. 31, No. 31, 28.06.2013, p. 3140-3147.

Research output: Contribution to journalArticle

Kumar, R, Nyakundi, R, Kariuki, T, Ozwara, H, Nyamongo, O, Mlambo, G, Ellefsen, B, Hannaman, D & Kumar, N 2013, 'Functional evaluation of malaria Pfs25 DNA vaccine by in vivo electroporation in olive baboons', Vaccine, vol. 31, no. 31, pp. 3140-3147. https://doi.org/10.1016/j.vaccine.2013.05.006
Kumar, Rajesh ; Nyakundi, Ruth ; Kariuki, Thomas ; Ozwara, Hastings ; Nyamongo, Onkoba ; Mlambo, Godfree ; Ellefsen, Barry ; Hannaman, Drew ; Kumar, Nirbhay. / Functional evaluation of malaria Pfs25 DNA vaccine by in vivo electroporation in olive baboons. In: Vaccine. 2013 ; Vol. 31, No. 31. pp. 3140-3147.
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