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Airway Memory CD4(+) T Cells Mediate Protective Immunity against Emerging Respiratory Coronaviruses
Journal article   Open access   Peer reviewed

Airway Memory CD4(+) T Cells Mediate Protective Immunity against Emerging Respiratory Coronaviruses

Jincun Zhao, Jingxian Zhao, Ashutosh K Mangalam, Rudragouda Channappanavar, Craig Fett, David K Meyerholz, Sudhakar Agnihothram, Ralph S Baric, Chella S David and Stanley Perlman
Immunity, Vol.44(6), pp.1379-1391
06/21/2016
DOI: 10.1016/j.immuni.2016.05.006
PMCID: PMC4917442
PMID: 27287409
url
https://doi.org/10.1016/j.immuni.2016.05.006View
Published (Version of record) Open Access

Abstract

Two zoonotic coronaviruses (CoVs)-SARS-CoV and MERS-CoV-have crossed species to cause severe human respiratory disease. Here, we showed that induction of airway memory CD4(+) T cells specific for a conserved epitope shared by SARS-CoV and MERS-CoV is a potential strategy for developing pan-coronavirus vaccines. Airway memory CD4(+) T cells differed phenotypically and functionally from lung-derived cells and were crucial for protection against both CoVs in mice. Protection was dependent on interferon-γ and required early induction of robust innate and virus-specific CD8(+) T cell responses. The conserved epitope was also recognized in SARS-CoV- and MERS-CoV-infected human leukocyte antigen DR2 and DR3 transgenic mice, indicating potential relevance in human populations. Additionally, this epitope was cross-protective between human and bat CoVs, the progenitors for many human CoVs. Vaccine strategies that induce airway memory CD4(+) T cells targeting conserved epitopes might have broad applicability in the context of new CoVs and other respiratory virus outbreaks.
SARS Virus - immunology Virion - immunology Humans Vaccination Cells, Cultured Severe Acute Respiratory Syndrome - immunology Interferon-gamma - metabolism Mice, Inbred Strains Coronavirus Infections - immunology Immunity CD4-Positive T-Lymphocytes - immunology Cross Reactions Antigens, Viral - immunology Animals CD8-Positive T-Lymphocytes - virology Immunologic Memory Mice Epitopes, T-Lymphocyte - immunology CD4-Positive T-Lymphocytes - virology CD8-Positive T-Lymphocytes - immunology Viral Vaccines - immunology Respiratory System - immunology

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