Serveur d'exploration SRAS

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Specific epitopes of the structural and hypothetical proteins elicit variable humoral responses in SARS patients

Identifieur interne : 004171 ( Main/Exploration ); précédent : 004170; suivant : 004172

Specific epitopes of the structural and hypothetical proteins elicit variable humoral responses in SARS patients

Auteurs : S C S. Chow [République populaire de Chine] ; C Y S. Ho [Hong Kong] ; T T Y. Tam [République populaire de Chine] ; C. Wu [États-Unis] ; T. Cheung [République populaire de Chine] ; P K S. Chan [Hong Kong] ; M H L. Ng [Hong Kong] ; P K Hui [Hong Kong] ; H K Ng [Hong Kong] ; D M Y. Au [République populaire de Chine] ; A W I. Lo [Hong Kong]

Source :

RBID : ISTEX:397FFD7B03F36B9F4A97FD23D1E4326316AEF5AA

Descripteurs français

English descriptors

Abstract

Background: Severe acute respiratory syndrome (SARS) is an infectious disease which was caused by a novel coronavirus (SARS-CoV). SARS has caused an outbreak in the world during 2003 and 2004, with 8098 individuals being infected and a death toll of 774 in 28 regions around the world. Specific humoral responses to viral infection remain unclear. Objective: To analyse the antigenicity of the SARS-CoV genome and identify potential antigenic epitopes in the structural proteins. Methods: Potential antigenic epitopes were identified in the structural proteins (nucleocapsid, membrane, spike, and small envelope proteins) and hypothetical proteins (SARS3a, 3b, 6, 7a, and 9b) that are specific for SARS-CoV. A peptide chip platform was created and the profiles of antibodies to these epitopes were investigated in 59 different SARS patients’ sera obtained 6–103 days after the onset of the illness. Serial sera from five additional patients were also studied. Results: Epitopes at the N-terminus of the membrane protein and the C-terminus of nucleocapsid protein elicited strong antibody responses. Epitopes on the spike protein were only moderately immunogenic but the effects were persistent. Antibodies were also detected for some putative proteins, noticeably the C-termini of SARS3a and SARS6. Conclusions: Important epitopes of the SARS-CoV genome that may serve as potential markers for the viral infection are identified. These specific antigenic sites may also be important for vaccine development against this new fatal infectious disease.

Url:
DOI: 10.1136/jcp.2005.029868


Affiliations:


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Le document en format XML

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<term>SARS, severe acute respiratory syndrome</term>
<term>Severe Acute Respiratory Syndrome (immunology)</term>
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<term>Viral Envelope Proteins (immunology)</term>
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<term>Viral Structural Proteins (immunology)</term>
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<term>coronavirus</term>
<term>peptide chip</term>
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<term>Antigènes viraux (génétique)</term>
<term>Antigènes viraux (immunologie)</term>
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<term>Production d'anticorps</term>
<term>Protéines de l'enveloppe virale (génétique)</term>
<term>Protéines de l'enveloppe virale (immunologie)</term>
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<term>Protéines virales structurales (immunologie)</term>
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<term>Administrative region</term>
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<term>Antibody responses</term>
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<term>Antigenic sites</term>
<term>Average fluorescence signals</term>
<term>Average fluorescence units</term>
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<term>Odds ratio</term>
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<term>Peptide chip</term>
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<term>Potential epitopes</term>
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<term>Respiratory syndrome</term>
<term>Respiratory syndrome coronavirus</term>
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<term>Sars control</term>
<term>Sars coronavirus</term>
<term>Sars patients</term>
<term>Sars3a</term>
<term>Second panel</term>
<term>Serial samples</term>
<term>Specific antigenic sites</term>
<term>Specific epitopes</term>
<term>Specific humoral responses</term>
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<term>Structural proteins</term>
<term>Syndrome</term>
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<term>Time interval</term>
<term>Time intervals</term>
<term>Upper panel</term>
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<term>Variable antibody responses</term>
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<term>Viral infection</term>
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<term>Humains</term>
<term>Production d'anticorps</term>
<term>Séquençage par oligonucléotides en batterie</term>
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<div type="abstract" xml:lang="en">Background: Severe acute respiratory syndrome (SARS) is an infectious disease which was caused by a novel coronavirus (SARS-CoV). SARS has caused an outbreak in the world during 2003 and 2004, with 8098 individuals being infected and a death toll of 774 in 28 regions around the world. Specific humoral responses to viral infection remain unclear. Objective: To analyse the antigenicity of the SARS-CoV genome and identify potential antigenic epitopes in the structural proteins. Methods: Potential antigenic epitopes were identified in the structural proteins (nucleocapsid, membrane, spike, and small envelope proteins) and hypothetical proteins (SARS3a, 3b, 6, 7a, and 9b) that are specific for SARS-CoV. A peptide chip platform was created and the profiles of antibodies to these epitopes were investigated in 59 different SARS patients’ sera obtained 6–103 days after the onset of the illness. Serial sera from five additional patients were also studied. Results: Epitopes at the N-terminus of the membrane protein and the C-terminus of nucleocapsid protein elicited strong antibody responses. Epitopes on the spike protein were only moderately immunogenic but the effects were persistent. Antibodies were also detected for some putative proteins, noticeably the C-termini of SARS3a and SARS6. Conclusions: Important epitopes of the SARS-CoV genome that may serve as potential markers for the viral infection are identified. These specific antigenic sites may also be important for vaccine development against this new fatal infectious disease.</div>
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