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Chimeric severe acute respiratory syndrome coronavirus (SARS-CoV) S glycoprotein and influenza matrix 1 efficiently form virus-like particles (VLPs) that protect mice against challenge with SARS-CoV

Identifieur interne : 002385 ( Main/Exploration ); précédent : 002384; suivant : 002386

Chimeric severe acute respiratory syndrome coronavirus (SARS-CoV) S glycoprotein and influenza matrix 1 efficiently form virus-like particles (VLPs) that protect mice against challenge with SARS-CoV

Auteurs : Ye V. Liu [États-Unis] ; Michael J. Massare [États-Unis] ; Dale L. Barnard [États-Unis] ; Thomas Kort [États-Unis] ; Margret Nathan [États-Unis] ; LEI WANG [États-Unis] ; Gale Smith [États-Unis]

Source :

RBID : Pascal:11-0394533

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English descriptors

Abstract

SARS-CoV was the cause of the global pandemic in 2003 that infected over 8000 people in 8 months. Vaccines against SARS are still not available. We developed a novel method to produce high levels of a recombinant SARS virus-like particles (VLPs) vaccine containing the SARS spike (S) protein and the influenza M1 protein using the baculovirus insect cell expression system. These chimeric SARS VLPs have a similar size and morphology to the wild type SARS-CoV. We tested the immunogenicity and protective efficacy of purified chimeric SARS VLPs and full length SARS S protein vaccines in a mouse lethal challenge model. The SARS VLP vaccine, containing 0.8 μg of SARS S protein, completely protected mice from death when administered intramuscular (IM) or intranasal (IN) routes in the absence of an adjuvant. Likewise, the SARS VLP vaccine, containing 4 μg of S protein without adjuvant, reduced lung virus titer to below detectable level, protected mice from weight loss, and elicited a high level of neutralizing antibodies against SARS-CoV. Sf9 cell-produced full length purified SARS S protein was also an effective vaccine against SARS-CoV but only when co-administered IM with aluminum hydroxide. SARS-CoV VLPs are highly immunogenic and induce neutralizing antibodies and provide protection against lethal challenge. Sf9 cell-based VLP vaccines are a potential tool to provide protection against novel pandemic agents.

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Le document en format XML

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<term>Virus syndrome respiratoire aigu sévère</term>
<term>Influenzavirus</term>
<term>Souris</term>
<term>Baculoviridae</term>
<term>Glycoprotéine</term>
<term>Particule type viral</term>
<term>Poumon</term>
<term>Anticorps neutralisant</term>
<term>Syndrome respiratoire aigu sévère</term>
<term>Grippe</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">SARS-CoV was the cause of the global pandemic in 2003 that infected over 8000 people in 8 months. Vaccines against SARS are still not available. We developed a novel method to produce high levels of a recombinant SARS virus-like particles (VLPs) vaccine containing the SARS spike (S) protein and the influenza M1 protein using the baculovirus insect cell expression system. These chimeric SARS VLPs have a similar size and morphology to the wild type SARS-CoV. We tested the immunogenicity and protective efficacy of purified chimeric SARS VLPs and full length SARS S protein vaccines in a mouse lethal challenge model. The SARS VLP vaccine, containing 0.8 μg of SARS S protein, completely protected mice from death when administered intramuscular (IM) or intranasal (IN) routes in the absence of an adjuvant. Likewise, the SARS VLP vaccine, containing 4 μg of S protein without adjuvant, reduced lung virus titer to below detectable level, protected mice from weight loss, and elicited a high level of neutralizing antibodies against SARS-CoV. Sf9 cell-produced full length purified SARS S protein was also an effective vaccine against SARS-CoV but only when co-administered IM with aluminum hydroxide. SARS-CoV VLPs are highly immunogenic and induce neutralizing antibodies and provide protection against lethal challenge. Sf9 cell-based VLP vaccines are a potential tool to provide protection against novel pandemic agents.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>États-Unis</li>
</country>
<region>
<li>Maryland</li>
<li>Utah</li>
</region>
</list>
<tree>
<country name="États-Unis">
<region name="Maryland">
<name sortKey="Liu, Ye V" sort="Liu, Ye V" uniqKey="Liu Y" first="Ye V." last="Liu">Ye V. Liu</name>
</region>
<name sortKey="Barnard, Dale L" sort="Barnard, Dale L" uniqKey="Barnard D" first="Dale L." last="Barnard">Dale L. Barnard</name>
<name sortKey="Kort, Thomas" sort="Kort, Thomas" uniqKey="Kort T" first="Thomas" last="Kort">Thomas Kort</name>
<name sortKey="Lei Wang" sort="Lei Wang" uniqKey="Lei Wang" last="Lei Wang">LEI WANG</name>
<name sortKey="Massare, Michael J" sort="Massare, Michael J" uniqKey="Massare M" first="Michael J." last="Massare">Michael J. Massare</name>
<name sortKey="Nathan, Margret" sort="Nathan, Margret" uniqKey="Nathan M" first="Margret" last="Nathan">Margret Nathan</name>
<name sortKey="Smith, Gale" sort="Smith, Gale" uniqKey="Smith G" first="Gale" last="Smith">Gale Smith</name>
</country>
</tree>
</affiliations>
</record>

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