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Long-term persistence of robust antibody and cytotoxic T cell responses in recovered patients infected with SARS coronavirus.

Identifieur interne : 003E27 ( Main/Exploration ); précédent : 003E26; suivant : 003E28

Long-term persistence of robust antibody and cytotoxic T cell responses in recovered patients infected with SARS coronavirus.

Auteurs : Taisheng Li [République populaire de Chine] ; Jing Xie ; Yuxian He ; Hongwei Fan ; Laurence Baril ; Zhifeng Qiu ; Yang Han ; Wenbing Xu ; Weihong Zhang ; Hui You ; Yanling Zuo ; Qing Fang ; Jian Yu ; Zhiwei Chen ; Linqi Zhang

Source :

RBID : pubmed:17183651

Descripteurs français

English descriptors

Abstract

Most of the individuals infected with SARS coronavirus (SARS-CoV) spontaneously recovered without clinical intervention. However, the immunological correlates associated with patients' recovery are currently unknown. In this report, we have sequentially monitored 30 recovered patients over a two-year period to characterize temporal changes in SARS-CoV-specific antibody responses as well as cytotoxic T cell (CTL) responses. We have found persistence of robust antibody and CTL responses in all of the study subjects throughout the study period, with a moderate decline one year after the onset of symptoms. We have also identified two potential major CTL epitopes in N proteins based on ELISPOT analysis of pooled peptides. However, despite the potent immune responses and clinical recovery, peripheral lymphocyte counts in the recovered patients have not yet been restored to normal levels. In summary, our study has, for the first time, characterized the temporal and dynamic changes of humoral and CTL responses in the natural history of SARS-recovered individuals, and strongly supports the notion that high and sustainable levels of immune responses correlate strongly with the disease outcome. Our findings have direct implications for future design and development of effective therapeutic agents and vaccines against SARS-CoV infection.

DOI: 10.1371/journal.pone.0000024
PubMed: 17183651


Affiliations:


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<nlm:affiliation>Department of Infectious Disease, Peking Union Medical College Hospital and AIDS Research Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; Institute of Pathogen Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. litsh@263.net</nlm:affiliation>
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<name sortKey="Han, Yang" sort="Han, Yang" uniqKey="Han Y" first="Yang" last="Han">Yang Han</name>
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<term>Adult</term>
<term>Amino Acid Sequence</term>
<term>Antibodies, Viral (blood)</term>
<term>Antibody Specificity</term>
<term>Antigens, Viral (genetics)</term>
<term>Case-Control Studies</term>
<term>Epitopes (genetics)</term>
<term>Female</term>
<term>Follow-Up Studies</term>
<term>Gene Frequency</term>
<term>Genes, MHC Class I</term>
<term>Genes, MHC Class II</term>
<term>Humans</term>
<term>Immunoglobulin G (blood)</term>
<term>Male</term>
<term>Middle Aged</term>
<term>Molecular Sequence Data</term>
<term>Nucleocapsid Proteins (genetics)</term>
<term>Nucleocapsid Proteins (immunology)</term>
<term>SARS Virus (genetics)</term>
<term>SARS Virus (immunology)</term>
<term>Severe Acute Respiratory Syndrome (genetics)</term>
<term>Severe Acute Respiratory Syndrome (immunology)</term>
<term>Severe Acute Respiratory Syndrome (virology)</term>
<term>T-Lymphocytes, Cytotoxic (immunology)</term>
<term>Time Factors</term>
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<term>Adulte d'âge moyen</term>
<term>Anticorps antiviraux (sang)</term>
<term>Antigènes viraux (génétique)</term>
<term>Données de séquences moléculaires</term>
<term>Facteurs temps</term>
<term>Femelle</term>
<term>Fréquence d'allèle</term>
<term>Gènes MHC de classe I</term>
<term>Gènes MHC de classe II</term>
<term>Humains</term>
<term>Immunoglobuline G (sang)</term>
<term>Lymphocytes T cytotoxiques (immunologie)</term>
<term>Mâle</term>
<term>Protéines nucléocapside (génétique)</term>
<term>Protéines nucléocapside (immunologie)</term>
<term>Spécificité des anticorps</term>
<term>Syndrome respiratoire aigu sévère (génétique)</term>
<term>Syndrome respiratoire aigu sévère (immunologie)</term>
<term>Syndrome respiratoire aigu sévère (virologie)</term>
<term>Séquence d'acides aminés</term>
<term>Virus du SRAS (génétique)</term>
<term>Virus du SRAS (immunologie)</term>
<term>Épitopes (génétique)</term>
<term>Études cas-témoins</term>
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<term>Antigens, Viral</term>
<term>Epitopes</term>
<term>Nucleocapsid Proteins</term>
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<term>SARS Virus</term>
<term>Severe Acute Respiratory Syndrome</term>
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<term>Antigènes viraux</term>
<term>Protéines nucléocapside</term>
<term>Syndrome respiratoire aigu sévère</term>
<term>Virus du SRAS</term>
<term>Épitopes</term>
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<term>Protéines nucléocapside</term>
<term>Syndrome respiratoire aigu sévère</term>
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<term>SARS Virus</term>
<term>Severe Acute Respiratory Syndrome</term>
<term>T-Lymphocytes, Cytotoxic</term>
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<term>Anticorps antiviraux</term>
<term>Immunoglobuline G</term>
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<term>Syndrome respiratoire aigu sévère</term>
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<term>Severe Acute Respiratory Syndrome</term>
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<front>
<div type="abstract" xml:lang="en">Most of the individuals infected with SARS coronavirus (SARS-CoV) spontaneously recovered without clinical intervention. However, the immunological correlates associated with patients' recovery are currently unknown. In this report, we have sequentially monitored 30 recovered patients over a two-year period to characterize temporal changes in SARS-CoV-specific antibody responses as well as cytotoxic T cell (CTL) responses. We have found persistence of robust antibody and CTL responses in all of the study subjects throughout the study period, with a moderate decline one year after the onset of symptoms. We have also identified two potential major CTL epitopes in N proteins based on ELISPOT analysis of pooled peptides. However, despite the potent immune responses and clinical recovery, peripheral lymphocyte counts in the recovered patients have not yet been restored to normal levels. In summary, our study has, for the first time, characterized the temporal and dynamic changes of humoral and CTL responses in the natural history of SARS-recovered individuals, and strongly supports the notion that high and sustainable levels of immune responses correlate strongly with the disease outcome. Our findings have direct implications for future design and development of effective therapeutic agents and vaccines against SARS-CoV infection.</div>
</front>
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