Intranasal vaccination with a replication-deficient influenza virus induces heterosubtypic neutralising mucosal IgA antibodies in humans
Identifieur interne : 001071 ( Main/Exploration ); précédent : 001070; suivant : 001072Intranasal vaccination with a replication-deficient influenza virus induces heterosubtypic neutralising mucosal IgA antibodies in humans
Auteurs : A. Morokutti [Autriche] ; T. Muster [Autriche] ; B. Ferko [Autriche]Source :
- Vaccine [ 0264-410X ] ; 2014.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Homme, Vaccination, Vaccin.
English descriptors
- KwdEn :
Abstract
We investigated the cross-neutralising potential of serum and nasal wash samples from volunteers who were intranasally immunised once with a monovalent replication-deficient deINS1-H1N1 influenza virus vaccine (7.7 log10 TCID50/volunteer). Eight out of twelve (8/12) vaccinees responded to vaccination with a significant increase of antibody levels in serum IgG ELISA, mucosal IgA ELISA, MNA or HAI. Four responders showed deINS1-specific ELISA IgA increases and revealed excellent homosubtypic neutralising activity in serum and mucosal washings (4/4). However, 0/4 of the sera but 3/4 of the nasal washings neutralised also heterosubtypic H3N2 and H5N1 influenza viruses. Depletion experiments proved that IgA but not IgG is responsible for the cross-neutralising activity of the nasal wash sample. Our findings indicate that the induction of virus-neutralising IgA may represent a valuable correlate of cross-protection of intranasal influenza vaccines and that the deINS1 concept constitutes a promising approach to protect humans from seasonal and pandemic influenza threats.
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream PascalFrancis, to step Corpus: 000114
- to stream PascalFrancis, to step Curation: 001D05
- to stream PascalFrancis, to step Checkpoint: 000079
- to stream Main, to step Merge: 001080
- to stream Main, to step Curation: 001071
Le document en format XML
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<term>Influenzavirus</term>
<term>Intranasal administration</term>
<term>Local immunity</term>
<term>Neutralizing antibody</term>
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<term>Vaccination</term>
<term>Vaccine</term>
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<term>Réplication</term>
<term>Anticorps neutralisant</term>
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<term>IgA</term>
<term>Immunisation</term>
<term>Vaccin</term>
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<front><div type="abstract" xml:lang="en">We investigated the cross-neutralising potential of serum and nasal wash samples from volunteers who were intranasally immunised once with a monovalent replication-deficient deINS1-H1N1 influenza virus vaccine (7.7 log<sub>10</sub>
TCID<sub>50</sub>
/volunteer). Eight out of twelve (8/12) vaccinees responded to vaccination with a significant increase of antibody levels in serum IgG ELISA, mucosal IgA ELISA, MNA or HAI. Four responders showed deINS1-specific ELISA IgA increases and revealed excellent homosubtypic neutralising activity in serum and mucosal washings (4/4). However, 0/4 of the sera but 3/4 of the nasal washings neutralised also heterosubtypic H3N2 and H5N1 influenza viruses. Depletion experiments proved that IgA but not IgG is responsible for the cross-neutralising activity of the nasal wash sample. Our findings indicate that the induction of virus-neutralising IgA may represent a valuable correlate of cross-protection of intranasal influenza vaccines and that the deINS1 concept constitutes a promising approach to protect humans from seasonal and pandemic influenza threats.</div>
</front>
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<affiliations><list><country><li>Autriche</li>
</country>
<region><li>Vienne (Autriche)</li>
</region>
<settlement><li>Vienne (Autriche)</li>
</settlement>
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<tree><country name="Autriche"><region name="Vienne (Autriche)"><name sortKey="Morokutti, A" sort="Morokutti, A" uniqKey="Morokutti A" first="A." last="Morokutti">A. Morokutti</name>
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<name sortKey="Ferko, B" sort="Ferko, B" uniqKey="Ferko B" first="B." last="Ferko">B. Ferko</name>
<name sortKey="Morokutti, A" sort="Morokutti, A" uniqKey="Morokutti A" first="A." last="Morokutti">A. Morokutti</name>
<name sortKey="Muster, T" sort="Muster, T" uniqKey="Muster T" first="T." last="Muster">T. Muster</name>
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