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Severe acute respiratory syndrome (SARS) S protein production in plants: Development of recombinant vaccine

Identifieur interne : 004639 ( Main/Exploration ); précédent : 004638; suivant : 004640

Severe acute respiratory syndrome (SARS) S protein production in plants: Development of recombinant vaccine

Auteurs : Natalia Pogrebnyak ; Maxim Golovkin ; Vyacheslav Andrianov ; Sergei Spitsin ; Yuriy Smirnov ; Richard Egolf ; Hilary Koprowski

Source :

RBID : PMC:1157057

Descripteurs français

English descriptors

Abstract

In view of a recent spread of severe acute respiratory syndrome (SARS), there is a high demand for production of a vaccine to prevent this disease. Recent studies indicate that SARS-coronavirus (CoV) spike protein (S protein) and its truncated fragments are considered the best candidates for generation of the recombinant vaccine. Toward the development of a safe, effective, and inexpensive vaccine candidate, we have expressed the N-terminal fragment of SARS-CoV S protein (S1) in tomato and low-nicotine tobacco plants. Incorporation of the S1 fragment into plant genomes as well as its transcription was confirmed by PCR and RT-PCR analyses. High levels of expression of recombinant S1 protein were observed in several transgenic lines by Western blot analysis using specific antibodies. Plant-derived antigen was evaluated to induce the systemic and mucosal immune responses in mice. Mice showed significantly increased levels of SARS-CoV-specific IgA after oral ingestion of tomato fruits expressing S1 protein. Sera of mice parenterally primed with tobacco-derived S1 protein revealed the presence of SARS-CoV-specific IgG as detected by Western blot and ELISA analysis.


Url:
DOI: 10.1073/pnas.0503760102
PubMed: 15956182
PubMed Central: 1157057


Affiliations:


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


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<term>Lycopersicon esculentum (virology)</term>
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<term>RNA, Messenger (genetics)</term>
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<term>Reverse Transcriptase Polymerase Chain Reaction</term>
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<term>SARS Virus (immunology)</term>
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<p>In view of a recent spread of severe acute respiratory syndrome (SARS), there is a high demand for production of a vaccine to prevent this disease. Recent studies indicate that SARS-coronavirus (CoV) spike protein (S protein) and its truncated fragments are considered the best candidates for generation of the recombinant vaccine. Toward the development of a safe, effective, and inexpensive vaccine candidate, we have expressed the N-terminal fragment of SARS-CoV S protein (S1) in tomato and low-nicotine tobacco plants. Incorporation of the S1 fragment into plant genomes as well as its transcription was confirmed by PCR and RT-PCR analyses. High levels of expression of recombinant S1 protein were observed in several transgenic lines by Western blot analysis using specific antibodies. Plant-derived antigen was evaluated to induce the systemic and mucosal immune responses in mice. Mice showed significantly increased levels of SARS-CoV-specific IgA after oral ingestion of tomato fruits expressing S1 protein. Sera of mice parenterally primed with tobacco-derived S1 protein revealed the presence of SARS-CoV-specific IgG as detected by Western blot and ELISA analysis.</p>
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