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Protective efficacy of an H1N1 cold-adapted live vaccine against the 2009 pandemic H1N1, seasonal H1N1, and H5N1 influenza viruses in mice

Identifieur interne : 000B45 ( Main/Exploration ); précédent : 000B44; suivant : 000B46

Protective efficacy of an H1N1 cold-adapted live vaccine against the 2009 pandemic H1N1, seasonal H1N1, and H5N1 influenza viruses in mice

Auteurs : JIANZHONG SHI [République populaire de Chine] ; ZHIYUAN WEN [République populaire de Chine] ; JING GUO [République populaire de Chine] ; YING ZHANG [République populaire de Chine] ; GUOHUA DENG [République populaire de Chine] ; YUELONG SHU [République populaire de Chine] ; DAYAN WANG [République populaire de Chine] ; YONGPING JIANG [République populaire de Chine] ; Yoshihiro Kawaoka [Japon] ; ZHIGAO BU [République populaire de Chine] ; HUALAN CHEN [République populaire de Chine]

Source :

RBID : Pascal:12-0179380

Descripteurs français

English descriptors

Abstract

Vaccination is a key strategy for preventing influenza virus infections. Here, we generated a reassortant virus (SC/AAca) containing the hemagglutinin and neuraminidase genes from a 2009 pandemic influenza virus A/Sichuan/1/2009 (H1N1) (SC/09) and six internal genes from the cold-adapted virus A/Ann Arbor/ 6/60 (H2N2) (AAca). The SC/AAca reassortant induced a sound humoral immune response and complete protection against homologous SC/09 virus challenge in mice after intranasal administration of an at least 106 50% egg infectious dose (EID50) of SC/AAca. SC/AAca inoculation also induced significant CD4+ and CD8+ T cell responses and provided solid protection against heterologous H1N1 and H5N1 virus challenge. Our results suggest that this 2009 H1N1 live vaccine will provide protection against both 2009 pandemic and seasonal H1N1 virus infection and might reduce the severity of H5N1 virus infection in humans. The induction of cross-reactive virus-specific T cell responses may be an effective approach to develop universal influenza vaccines.


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Le document en format XML

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</teiHeader>
<front>
<div type="abstract" xml:lang="en">Vaccination is a key strategy for preventing influenza virus infections. Here, we generated a reassortant virus (SC/AAca) containing the hemagglutinin and neuraminidase genes from a 2009 pandemic influenza virus A/Sichuan/1/2009 (H1N1) (SC/09) and six internal genes from the cold-adapted virus A/Ann Arbor/ 6/60 (H2N2) (AAca). The SC/AAca reassortant induced a sound humoral immune response and complete protection against homologous SC/09 virus challenge in mice after intranasal administration of an at least 10
<sup>6</sup>
50% egg infectious dose (EID
<sub>50</sub>
) of SC/AAca. SC/AAca inoculation also induced significant CD4+ and CD8+ T cell responses and provided solid protection against heterologous H1N1 and H5N1 virus challenge. Our results suggest that this 2009 H1N1 live vaccine will provide protection against both 2009 pandemic and seasonal H1N1 virus infection and might reduce the severity of H5N1 virus infection in humans. The induction of cross-reactive virus-specific T cell responses may be an effective approach to develop universal influenza vaccines.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>Japon</li>
<li>République populaire de Chine</li>
</country>
<region>
<li>Région de Kantō</li>
<li>Wisconsin</li>
</region>
<settlement>
<li>Madison (Wisconsin)</li>
<li>Pékin</li>
<li>Tokyo</li>
</settlement>
<orgName>
<li>Université de Tokyo</li>
<li>Université du Wisconsin à Madison</li>
</orgName>
</list>
<tree>
<country name="République populaire de Chine">
<noRegion>
<name sortKey="Jianzhong Shi" sort="Jianzhong Shi" uniqKey="Jianzhong Shi" last="Jianzhong Shi">JIANZHONG SHI</name>
</noRegion>
<name sortKey="Dayan Wang" sort="Dayan Wang" uniqKey="Dayan Wang" last="Dayan Wang">DAYAN WANG</name>
<name sortKey="Guohua Deng" sort="Guohua Deng" uniqKey="Guohua Deng" last="Guohua Deng">GUOHUA DENG</name>
<name sortKey="Hualan Chen" sort="Hualan Chen" uniqKey="Hualan Chen" last="Hualan Chen">HUALAN CHEN</name>
<name sortKey="Jing Guo" sort="Jing Guo" uniqKey="Jing Guo" last="Jing Guo">JING GUO</name>
<name sortKey="Ying Zhang" sort="Ying Zhang" uniqKey="Ying Zhang" last="Ying Zhang">YING ZHANG</name>
<name sortKey="Yongping Jiang" sort="Yongping Jiang" uniqKey="Yongping Jiang" last="Yongping Jiang">YONGPING JIANG</name>
<name sortKey="Yuelong Shu" sort="Yuelong Shu" uniqKey="Yuelong Shu" last="Yuelong Shu">YUELONG SHU</name>
<name sortKey="Zhigao Bu" sort="Zhigao Bu" uniqKey="Zhigao Bu" last="Zhigao Bu">ZHIGAO BU</name>
<name sortKey="Zhiyuan Wen" sort="Zhiyuan Wen" uniqKey="Zhiyuan Wen" last="Zhiyuan Wen">ZHIYUAN WEN</name>
</country>
<country name="Japon">
<region name="Région de Kantō">
<name sortKey="Kawaoka, Yoshihiro" sort="Kawaoka, Yoshihiro" uniqKey="Kawaoka Y" first="Yoshihiro" last="Kawaoka">Yoshihiro Kawaoka</name>
</region>
</country>
</tree>
</affiliations>
</record>

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