A candidate H1N1 pandemic influenza vaccine elicits protective Immunity in mice.

Jacobson, Steven, Steitz, Julia, Barlow, Peter G, Hossain, M Jaber, Kim, Eun, Okada, Kaori, Kenniston, Tom, Rea, Sheri, Donis, Ruben O and Gambotto, Andrea (2010) A candidate H1N1 pandemic influenza vaccine elicits protective Immunity in mice. PLoS ONE, 5 (5). e10492. ISSN 1932-6203

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In 2009 a new pandemic disease appeared and spread globally. The recent emergence of the pandemic influenza virus H1N1 first isolated in Mexico and USA raised concerns about vaccine availability. We here report our development of an adenovirus-based influenza H1N1 vaccine tested for immunogenicity and efficacy to confer protection in animal model.

We generated two adenovirus(Ad5)-based influenza vaccine candidates encoding the wildtype or a codon-optimized hemagglutinin antigen (HA) from the recently emerged swine influenza isolate A/California/04/2009 (H1N1)pdm. After verification of antigen expression, immunogenicity of the vaccine candidates were tested in a mouse model using dose escalations for subcutaneous immunization. Sera of immunized animals were tested in microneutalization and hemagglutination inhibition assays for the presence of HA-specific antibodies. HA-specific T-cells were measured in IFNγ Elispot assays. The efficiency of the influenza vaccine candidates were evaluated in a challenge model by measuring viral titer in lung and nasal turbinate 3 days after inoculation of a homologous H1N1 virus.

A single immunization resulted in robust cellular and humoral immune response. Remarkably, the intensity of the immune response was substantially enhanced with codon-optimized antigen, indicating the benefit of manipulating the genetic code of HA antigens in the context of recombinant influenza vaccine design. These results highlight the value of advanced technologies in vaccine development and deployment in response to infections with pandemic potential. Our study emphasizes the potential of an adenoviral-based influenza vaccine platform with the benefits of speed of manufacture and efficacy of a single dose immunization

Item Type: Article
Print ISSN: 1932-6203
Uncontrolled Keywords: Influenza virus H1N1; vaccines; immunogenicity; immune response;
University Divisions/Research Centres: Faculty of Health, Life & Social Sciences > School of Health and Social Sciences
Dewey Decimal Subjects: 600 Technology > 610 Medicine & health > 616 Diseases > 616.2 Respiratory diseases
Library of Congress Subjects: R Medicine > RF Otorhinolaryngology
Item ID: 5173
Depositing User: Mrs Lyn Gibson
Date Deposited: 27 Mar 2012 11:18
Last Modified: 23 Sep 2015 10:35

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