Journal
ARCHIVES OF VIROLOGY
Volume 154, Issue 7, Pages 1093-1099Publisher
SPRINGER WIEN
DOI: 10.1007/s00705-009-0409-6
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Funding
- National 863'' Project [2007AA02Z415]
- Scientific Technology Program of Guangdong Province [2006B36005005]
- Science and Technology Program of Guangzhou [2008J1-C141-3]
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SARS-CoV infection of human results in antigen-specific cellular and humoral immune responses. However, it is critical to determine whether SARS-CoV-specific memory T cells can persist for long periods of time. In this study, we analyzed the cellular immune response from 21 SARS-recovered individuals who had been diagnosed with SARS in 2003 by using ELISA, CBA, ELISpot and multiparameter flow cytometry assays. Our results demonstrated that low levels of specific memory T cell responses to SARS-CoV S, M, E and N peptides were detected in a proportion of SARS-recovered patients, and IFN-gamma was the predominant cytokine produced by T cells after stimulation with peptides. Cytometry analysis indicated that the majority of memory CD8(+) T cells produced IFN-gamma, whereas memory CD4(+) T cells produced IFN-gamma, IL-2 or TNF-alpha. These results might provide valuable information on the cellular immune response in recovered SARS-CoV patients for the rational design of vaccines against SARS-CoV infection.
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