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Evaluation of safety and immunogenicity of recombinant influenza hemagglutinin (H5/Indonesia/05/2005) formulated with and without a stable oil-in-water emulsion containing glucopyranosyl-lipid A (SE + GLA) adjuvant

Identifieur interne : 001848 ( Main/Exploration ); précédent : 001847; suivant : 001849

Evaluation of safety and immunogenicity of recombinant influenza hemagglutinin (H5/Indonesia/05/2005) formulated with and without a stable oil-in-water emulsion containing glucopyranosyl-lipid A (SE + GLA) adjuvant

Auteurs : John J. Treanor [États-Unis] ; Brandon Essink [États-Unis] ; Steven Hull [États-Unis] ; Steven Reed [États-Unis] ; Ruvim Izikson [États-Unis] ; Peter Patriarca [États-Unis] ; Karen L. Goldenthal [États-Unis] ; Robert Kohberger [États-Unis] ; Lisa M. Dunkle [États-Unis]

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RBID : Pascal:14-0027942

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Abstract

Background: Expression of recombinant hemagglutinin (rHA) in insect cells represents a technology with proven efficacy in seasonal influenza and with the potential for a rapid response to the emergence of new, pandemic strains. We evaluated the safety and immunogenicity of rHA vaccine (H5/Indonesia/5/05) produced in SF+ insect cells using a baculovirus expression vector system (BEVS). The rHA vaccine was tested with and without the adjuvant glucopyranosyl lipid A/stable emulsion (GLA/SE). Methods: Healthy adults 18-49 were randomized to two IM doses on Days 0 and 21 of placebo; unadjuvanted rHA 135 μg or 45 μg, or rHA 45 μg, 15 μg, 7.5 μg or 3.8 μg with GLA/SE. A pioneer group was monitored through Day 42 before randomizing remaining subjects. H5-specific antibody was determined by hemagglutination inhibition (HAI) and microneutralization (MN) on Days 0, 21 and 42. Results: 392 subjects were randomized, of whom 380 (97%) received two doses and 386 (98%) completed 12 months of follow-up. Injection site pain and tenderness were seen in 50-70% of rHA + GLA/SE recipients and 4-9% of rHA alone and placebo recipients, but most complaints were mild to moderate in intensity. After two doses, the proportions of subjects with HAI titers ≥1:40 were 32% and 15% in the unadjuvanted 135 μg and 45 μg groups, and 82%, 75%, 66%, and 72% in those receiving 45 μg, 15 μg, 7.5 μg, or 3.8 μg with GLA/SE. The geometric mean titers (GMTs) of HAI antibody on Day 42 were 128, 95, 69, and 72 in the 45 μg, 15 μg, 7.5 μg, or 3.8 μg with GLA/SE groups, respectively. Conclusions: rHA GLA/SE was well tolerated and immunogenic in healthy adults, and GLA/SE substantially improved the serum antibody response. rHA expressed using BEVS recombinant DNA platform technology represents a promising strategy for pandemic control.


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<title level="j" type="main">Vaccine</title>
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<term>Avian influenzavirus</term>
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<term>Influenzavirus aviaire</term>
<term>Immunogénicité</term>
<term>Hémagglutinine</term>
<term>Indonésie</term>
<term>Adjuvant immunologique</term>
<term>Vaccin</term>
<term>Grippe</term>
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<front>
<div type="abstract" xml:lang="en">Background: Expression of recombinant hemagglutinin (rHA) in insect cells represents a technology with proven efficacy in seasonal influenza and with the potential for a rapid response to the emergence of new, pandemic strains. We evaluated the safety and immunogenicity of rHA vaccine (H5/Indonesia/5/05) produced in SF+ insect cells using a baculovirus expression vector system (BEVS). The rHA vaccine was tested with and without the adjuvant glucopyranosyl lipid A/stable emulsion (GLA/SE). Methods: Healthy adults 18-49 were randomized to two IM doses on Days 0 and 21 of placebo; unadjuvanted rHA 135 μg or 45 μg, or rHA 45 μg, 15 μg, 7.5 μg or 3.8 μg with GLA/SE. A pioneer group was monitored through Day 42 before randomizing remaining subjects. H5-specific antibody was determined by hemagglutination inhibition (HAI) and microneutralization (MN) on Days 0, 21 and 42. Results: 392 subjects were randomized, of whom 380 (97%) received two doses and 386 (98%) completed 12 months of follow-up. Injection site pain and tenderness were seen in 50-70% of rHA + GLA/SE recipients and 4-9% of rHA alone and placebo recipients, but most complaints were mild to moderate in intensity. After two doses, the proportions of subjects with HAI titers ≥1:40 were 32% and 15% in the unadjuvanted 135 μg and 45 μg groups, and 82%, 75%, 66%, and 72% in those receiving 45 μg, 15 μg, 7.5 μg, or 3.8 μg with GLA/SE. The geometric mean titers (GMTs) of HAI antibody on Day 42 were 128, 95, 69, and 72 in the 45 μg, 15 μg, 7.5 μg, or 3.8 μg with GLA/SE groups, respectively. Conclusions: rHA GLA/SE was well tolerated and immunogenic in healthy adults, and GLA/SE substantially improved the serum antibody response. rHA expressed using BEVS recombinant DNA platform technology represents a promising strategy for pandemic control.</div>
</front>
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<name sortKey="Kohberger, Robert" sort="Kohberger, Robert" uniqKey="Kohberger R" first="Robert" last="Kohberger">Robert Kohberger</name>
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