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Nanovaccine Confers Dual Protection Against Influenza A Virus And Porcine Circovirus Type 2

Identifieur interne : 000064 ( Main/Exploration ); précédent : 000063; suivant : 000065

Nanovaccine Confers Dual Protection Against Influenza A Virus And Porcine Circovirus Type 2

Auteurs : Peiyang Ding [République populaire de Chine] ; Qianyue Jin [République populaire de Chine] ; Xinxin Chen [République populaire de Chine] ; Suzhen Yang [République populaire de Chine] ; Junqing Guo [République populaire de Chine] ; Guangxu Xing [République populaire de Chine] ; Ruiguang Deng [République populaire de Chine] ; Aiping Wang [République populaire de Chine] ; Gaiping Zhang [République populaire de Chine]

Source :

RBID : PMC:6754344

Abstract

Background

The influenza A virus (IAV) is known for its high variability and poses a huge threat to the health of humans and animals. Pigs play a central role in the cross-species reassortment of IAV. Ectodomain of matrix protein 2 (M2e) is the most conserved protective antigen in IAV and can be used to develop nanovaccines through nanoparticles displaying to increase its immunogenicity. However, the high immunogenicity of nanoparticles can cause the risk of off-target immune response, and excess unwanted antibodies may interfere with the protective efficacy of M2e-specific antibodies. Therefore, it is necessary to select reasonable nanoparticles to make full use of antibodies against nanoparticles while increasing the level of M2e-specific antibodies. Porcine circovirus type 2 (PCV2) is the most susceptible virus in pigs and can promote IAV infection. It is meaningful to develop a vaccine that can simultaneously control swine influenza virus (SIV) and PCV2.

Methods

In the present study, M2e of different copy numbers were inserted into the capsid (Cap) protein of PCV2 and expressed in Escherichia coli to form self-assembled chimeric virus-like particles (VLPs) nanovaccine. BALB/c mice and pigs were immunized with these nanovaccines to explore optimal anti-IAV and anti-PCV2 immunity.

Results

Cap is capable of carrying at least 81 amino acid residues (three copies of M2e) at its C-terminal without impairing VLPs formation. Cap-3M2e VLPs induced the highest levels of M2e-specific immune responses, conferring protection against lethal challenge of IAVs from different species and induced specific immune responses consistent with PCV2 commercial vaccines in mice. In addition, Cap-3M2e VLPs induced high levels of M2e-specific antibodies and PCV2-specific neutralizing antibodies in pigs.

Conclusion

Cap-3M2e VLP is an economical and promising bivalent nanovaccine, which provides dual protection against IAV and PCV2.


Url:
DOI: 10.2147/IJN.S218057
PubMed: 31571862
PubMed Central: 6754344


Affiliations:


Links toward previous steps (curation, corpus...)


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<title level="j">International Journal of Nanomedicine</title>
<idno type="ISSN">1176-9114</idno>
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<title>Background</title>
<p>The influenza A virus (IAV) is known for its high variability and poses a huge threat to the health of humans and animals. Pigs play a central role in the cross-species reassortment of IAV. Ectodomain of matrix protein 2 (M2e) is the most conserved protective antigen in IAV and can be used to develop nanovaccines through nanoparticles displaying to increase its immunogenicity. However, the high immunogenicity of nanoparticles can cause the risk of off-target immune response, and excess unwanted antibodies may interfere with the protective efficacy of M2e-specific antibodies. Therefore, it is necessary to select reasonable nanoparticles to make full use of antibodies against nanoparticles while increasing the level of M2e-specific antibodies. Porcine circovirus type 2 (PCV2) is the most susceptible virus in pigs and can promote IAV infection. It is meaningful to develop a vaccine that can simultaneously control swine influenza virus (SIV) and PCV2.</p>
</sec>
<sec id="S2002">
<title>Methods</title>
<p>In the present study, M2e of different copy numbers were inserted into the capsid (Cap) protein of PCV2 and expressed in
<italic>Escherichia coli</italic>
to form self-assembled chimeric virus-like particles (VLPs) nanovaccine. BALB/c mice and pigs were immunized with these nanovaccines to explore optimal anti-IAV and anti-PCV2 immunity.</p>
</sec>
<sec id="S2003">
<title>Results</title>
<p>Cap is capable of carrying at least 81 amino acid residues (three copies of M2e) at its C-terminal without impairing VLPs formation. Cap-3M2e VLPs induced the highest levels of M2e-specific immune responses, conferring protection against lethal challenge of IAVs from different species and induced specific immune responses consistent with PCV2 commercial vaccines in mice. In addition, Cap-3M2e VLPs induced high levels of M2e-specific antibodies and PCV2-specific neutralizing antibodies in pigs.</p>
</sec>
<sec id="S2004">
<title>Conclusion</title>
<p>Cap-3M2e VLP is an economical and promising bivalent nanovaccine, which provides dual protection against IAV and PCV2.</p>
</sec>
</div>
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<affiliations>
<list>
<country>
<li>République populaire de Chine</li>
</country>
</list>
<tree>
<country name="République populaire de Chine">
<noRegion>
<name sortKey="Ding, Peiyang" sort="Ding, Peiyang" uniqKey="Ding P" first="Peiyang" last="Ding">Peiyang Ding</name>
</noRegion>
<name sortKey="Chen, Xinxin" sort="Chen, Xinxin" uniqKey="Chen X" first="Xinxin" last="Chen">Xinxin Chen</name>
<name sortKey="Deng, Ruiguang" sort="Deng, Ruiguang" uniqKey="Deng R" first="Ruiguang" last="Deng">Ruiguang Deng</name>
<name sortKey="Ding, Peiyang" sort="Ding, Peiyang" uniqKey="Ding P" first="Peiyang" last="Ding">Peiyang Ding</name>
<name sortKey="Guo, Junqing" sort="Guo, Junqing" uniqKey="Guo J" first="Junqing" last="Guo">Junqing Guo</name>
<name sortKey="Jin, Qianyue" sort="Jin, Qianyue" uniqKey="Jin Q" first="Qianyue" last="Jin">Qianyue Jin</name>
<name sortKey="Jin, Qianyue" sort="Jin, Qianyue" uniqKey="Jin Q" first="Qianyue" last="Jin">Qianyue Jin</name>
<name sortKey="Wang, Aiping" sort="Wang, Aiping" uniqKey="Wang A" first="Aiping" last="Wang">Aiping Wang</name>
<name sortKey="Xing, Guangxu" sort="Xing, Guangxu" uniqKey="Xing G" first="Guangxu" last="Xing">Guangxu Xing</name>
<name sortKey="Yang, Suzhen" sort="Yang, Suzhen" uniqKey="Yang S" first="Suzhen" last="Yang">Suzhen Yang</name>
<name sortKey="Zhang, Gaiping" sort="Zhang, Gaiping" uniqKey="Zhang G" first="Gaiping" last="Zhang">Gaiping Zhang</name>
<name sortKey="Zhang, Gaiping" sort="Zhang, Gaiping" uniqKey="Zhang G" first="Gaiping" last="Zhang">Gaiping Zhang</name>
<name sortKey="Zhang, Gaiping" sort="Zhang, Gaiping" uniqKey="Zhang G" first="Gaiping" last="Zhang">Gaiping Zhang</name>
<name sortKey="Zhang, Gaiping" sort="Zhang, Gaiping" uniqKey="Zhang G" first="Gaiping" last="Zhang">Gaiping Zhang</name>
</country>
</tree>
</affiliations>
</record>

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