Priming with a simplified intradermal HIV-1 DNA vaccine regimen followed by boosting with recombinant HIV-1 MVA vaccine is safe and immunogenic: a phase IIa randomized clinical trial.

<h4>Background</h4>Intradermal priming with HIV-1 DNA plasmids followed by HIV-1MVA boosting induces strong and broad cellular and humoral immune responses. In our previous HIVIS-03 trial, we used 5 injections with 2 pools of HIV-DNA at separate sites for each priming immunization. The p...

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Main Authors: Patricia J Munseri, Arne Kroidl, Charlotta Nilsson, Agricola Joachim, Christof Geldmacher, Philipp Mann, Candida Moshiro, Said Aboud, Eligius Lyamuya, Leonard Maboko, Marco Missanga, Bahati Kaluwa, Sayoki Mfinanga, Lilly Podola, Asli Bauer, Karina Godoy-Ramirez, Mary Marovich, Bernard Moss, Michael Hoelscher, Frances Gotch, Wolfgang Stöhr, Richard Stout, Sheena McCormack, Britta Wahren, Fred Mhalu, Merlin L Robb, Gunnel Biberfeld, Eric Sandström, Muhammad Bakari
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Language:English
Published: Public Library of Science (PLoS) 2015-01-01
Series:PLoS ONE
Online Access:https://doi.org/10.1371/journal.pone.0119629
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author Patricia J Munseri
Arne Kroidl
Charlotta Nilsson
Agricola Joachim
Christof Geldmacher
Philipp Mann
Candida Moshiro
Said Aboud
Eligius Lyamuya
Leonard Maboko
Marco Missanga
Bahati Kaluwa
Sayoki Mfinanga
Lilly Podola
Asli Bauer
Karina Godoy-Ramirez
Mary Marovich
Bernard Moss
Michael Hoelscher
Frances Gotch
Wolfgang Stöhr
Richard Stout
Sheena McCormack
Britta Wahren
Fred Mhalu
Merlin L Robb
Gunnel Biberfeld
Eric Sandström
Muhammad Bakari
author_facet Patricia J Munseri
Arne Kroidl
Charlotta Nilsson
Agricola Joachim
Christof Geldmacher
Philipp Mann
Candida Moshiro
Said Aboud
Eligius Lyamuya
Leonard Maboko
Marco Missanga
Bahati Kaluwa
Sayoki Mfinanga
Lilly Podola
Asli Bauer
Karina Godoy-Ramirez
Mary Marovich
Bernard Moss
Michael Hoelscher
Frances Gotch
Wolfgang Stöhr
Richard Stout
Sheena McCormack
Britta Wahren
Fred Mhalu
Merlin L Robb
Gunnel Biberfeld
Eric Sandström
Muhammad Bakari
author_sort Patricia J Munseri
collection DOAJ
description <h4>Background</h4>Intradermal priming with HIV-1 DNA plasmids followed by HIV-1MVA boosting induces strong and broad cellular and humoral immune responses. In our previous HIVIS-03 trial, we used 5 injections with 2 pools of HIV-DNA at separate sites for each priming immunization. The present study explores whether HIV-DNA priming can be simplified by reducing the number of DNA injections and administration of combined versus separated plasmid pools.<h4>Methods</h4>In this phase IIa, randomized trial, priming was performed using 5 injections of HIV-DNA, 1000 μg total dose, (3 Env and 2 Gag encoding plasmids) compared to two "simplified" regimens of 2 injections of HIV-DNA, 600 μg total dose, of Env- and Gag-encoding plasmid pools with each pool either administered separately or combined. HIV-DNA immunizations were given intradermally at weeks 0, 4, and 12. Boosting was performed intramuscularly with 108 pfu HIV-MVA at weeks 30 and 46.<h4>Results</h4>129 healthy Tanzanian participants were enrolled. There were no differences in adverse events between the groups. The proportion of IFN-γ ELISpot responders to Gag and/or Env peptides after the second HIV-MVA boost did not differ significantly between the groups primed with 2 injections of combined HIV-DNA pools, 2 injections with separated pools, and 5 injections with separated pools (90%, 97% and 97%). There were no significant differences in the magnitude of Gag and/or Env IFN-γ ELISpot responses, in CD4+ and CD8+ T cell responses measured as IFN-γ/IL-2 production by intracellular cytokine staining (ICS) or in response rates and median titers for binding antibodies to Env gp160 between study groups.<h4>Conclusions</h4>A simplified intradermal vaccination regimen with 2 injections of a total of 600 μg with combined HIV-DNA plasmids primed cellular responses as efficiently as the standard regimen of 5 injections of a total of 1000 μg with separated plasmid pools after boosting twice with HIV-MVA.<h4>Trial registration</h4>World Health Organization International Clinical Trials Registry Platform PACTR2010050002122368.
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spelling doaj-art-e5e9b58917bb44f98a3a9654a78c5a2f2025-08-20T03:46:23ZengPublic Library of Science (PLoS)PLoS ONE1932-62032015-01-01104e011962910.1371/journal.pone.0119629Priming with a simplified intradermal HIV-1 DNA vaccine regimen followed by boosting with recombinant HIV-1 MVA vaccine is safe and immunogenic: a phase IIa randomized clinical trial.Patricia J MunseriArne KroidlCharlotta NilssonAgricola JoachimChristof GeldmacherPhilipp MannCandida MoshiroSaid AboudEligius LyamuyaLeonard MabokoMarco MissangaBahati KaluwaSayoki MfinangaLilly PodolaAsli BauerKarina Godoy-RamirezMary MarovichBernard MossMichael HoelscherFrances GotchWolfgang StöhrRichard StoutSheena McCormackBritta WahrenFred MhaluMerlin L RobbGunnel BiberfeldEric SandströmMuhammad Bakari<h4>Background</h4>Intradermal priming with HIV-1 DNA plasmids followed by HIV-1MVA boosting induces strong and broad cellular and humoral immune responses. In our previous HIVIS-03 trial, we used 5 injections with 2 pools of HIV-DNA at separate sites for each priming immunization. The present study explores whether HIV-DNA priming can be simplified by reducing the number of DNA injections and administration of combined versus separated plasmid pools.<h4>Methods</h4>In this phase IIa, randomized trial, priming was performed using 5 injections of HIV-DNA, 1000 μg total dose, (3 Env and 2 Gag encoding plasmids) compared to two "simplified" regimens of 2 injections of HIV-DNA, 600 μg total dose, of Env- and Gag-encoding plasmid pools with each pool either administered separately or combined. HIV-DNA immunizations were given intradermally at weeks 0, 4, and 12. Boosting was performed intramuscularly with 108 pfu HIV-MVA at weeks 30 and 46.<h4>Results</h4>129 healthy Tanzanian participants were enrolled. There were no differences in adverse events between the groups. The proportion of IFN-γ ELISpot responders to Gag and/or Env peptides after the second HIV-MVA boost did not differ significantly between the groups primed with 2 injections of combined HIV-DNA pools, 2 injections with separated pools, and 5 injections with separated pools (90%, 97% and 97%). There were no significant differences in the magnitude of Gag and/or Env IFN-γ ELISpot responses, in CD4+ and CD8+ T cell responses measured as IFN-γ/IL-2 production by intracellular cytokine staining (ICS) or in response rates and median titers for binding antibodies to Env gp160 between study groups.<h4>Conclusions</h4>A simplified intradermal vaccination regimen with 2 injections of a total of 600 μg with combined HIV-DNA plasmids primed cellular responses as efficiently as the standard regimen of 5 injections of a total of 1000 μg with separated plasmid pools after boosting twice with HIV-MVA.<h4>Trial registration</h4>World Health Organization International Clinical Trials Registry Platform PACTR2010050002122368.https://doi.org/10.1371/journal.pone.0119629
spellingShingle Patricia J Munseri
Arne Kroidl
Charlotta Nilsson
Agricola Joachim
Christof Geldmacher
Philipp Mann
Candida Moshiro
Said Aboud
Eligius Lyamuya
Leonard Maboko
Marco Missanga
Bahati Kaluwa
Sayoki Mfinanga
Lilly Podola
Asli Bauer
Karina Godoy-Ramirez
Mary Marovich
Bernard Moss
Michael Hoelscher
Frances Gotch
Wolfgang Stöhr
Richard Stout
Sheena McCormack
Britta Wahren
Fred Mhalu
Merlin L Robb
Gunnel Biberfeld
Eric Sandström
Muhammad Bakari
Priming with a simplified intradermal HIV-1 DNA vaccine regimen followed by boosting with recombinant HIV-1 MVA vaccine is safe and immunogenic: a phase IIa randomized clinical trial.
PLoS ONE
title Priming with a simplified intradermal HIV-1 DNA vaccine regimen followed by boosting with recombinant HIV-1 MVA vaccine is safe and immunogenic: a phase IIa randomized clinical trial.
title_full Priming with a simplified intradermal HIV-1 DNA vaccine regimen followed by boosting with recombinant HIV-1 MVA vaccine is safe and immunogenic: a phase IIa randomized clinical trial.
title_fullStr Priming with a simplified intradermal HIV-1 DNA vaccine regimen followed by boosting with recombinant HIV-1 MVA vaccine is safe and immunogenic: a phase IIa randomized clinical trial.
title_full_unstemmed Priming with a simplified intradermal HIV-1 DNA vaccine regimen followed by boosting with recombinant HIV-1 MVA vaccine is safe and immunogenic: a phase IIa randomized clinical trial.
title_short Priming with a simplified intradermal HIV-1 DNA vaccine regimen followed by boosting with recombinant HIV-1 MVA vaccine is safe and immunogenic: a phase IIa randomized clinical trial.
title_sort priming with a simplified intradermal hiv 1 dna vaccine regimen followed by boosting with recombinant hiv 1 mva vaccine is safe and immunogenic a phase iia randomized clinical trial
url https://doi.org/10.1371/journal.pone.0119629
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