SrasV1, Main, Exploration, bibRecord, 002945

Cellular Immune Responses to Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV) Infection in Senescent BALB/c Mice: CD4+ T Cells Are Important in Control of SARS-CoV Infection

Identifieur interne : 002945 ( Main/Exploration ); précédent : 002944; suivant : 002946

Cellular Immune Responses to Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV) Infection in Senescent BALB/c Mice: CD4+ T Cells Are Important in Control of SARS-CoV Infection

Auteurs : JUN CHEN [États-Unis] ; YUK FAI LAU [États-Unis] ; Elaine W. Lamirande [États-Unis] ; Christopher D. Paddock [États-Unis] ; Jeanine H. Bartlett [États-Unis] ; Sherif R. Zaki [États-Unis] ; Kanta Subbarao [États-Unis]

Source :

Journal of virology [ 0022-538X ] ; 2010.

RBID : Pascal:10-0093787

Descripteurs français

Pascal (Inist)
- Virus syndrome respiratoire aigu sévère, Souris, Immunité cellulaire, Infection, Animal, Lymphocyte T CD4, Syndrome respiratoire aigu sévère.

English descriptors

KwdEn :
- Animal, CD4 T lymphocyte, Cellular immunity, Infection, Mouse, Severe acute respiratory syndrome, Severe acute respiratory syndrome virus.

Abstract

We characterized the cellular immune response to severe acute respiratory syndrome coronavirus (SARS-CoV) infection in 12- to 14-month-old BALB/c mice, a model that mimics features of the human disease. Following intranasal administration, the virus replicated in the lungs, with peak titers on day 2 postinfection. Enhanced production of cytokines (tumor necrosis factor alpha [TNF-α] and interleukin-6 [IL-6]) and chemokines (CXCL10, CCL2, CCL3, and CCL5) correlated with migration of NK cells, macrophages, and plasmacytoid dendritic cells (pDC) into the lungs. By day 7, histopathologic evidence of pneumonitis was seen in the lungs when viral clearance occurred. At this time, a second wave of enhanced production of cytokines (TNF-α, IL-6, gamma interferon [IFN-γ], IL-2, and IL-5), chemokines (CXCL9, CXCL10, CCL2, CCL3, and CCL5), and receptors (CXCR3, CCR2, and CCR5), was detected in the lungs, associated with an influx of T lymphocytes. Depletion of CD8⁺ T cells at the time of infection did not affect viral replication or clearance. However, depletion of CD4⁺ T cells resulted in an enhanced immune-mediated interstitial pneumonitis and delayed clearance of SARS-CoV from the lungs, which was associated with reduced neutralizing antibody and cytokine production and reduced pulmonary recruitment of lymphocytes. Innate defense mechanisms are able to control SARS-CoV infection in the absence of CD4⁺ and CD8⁺ T cells and antibodies. Our findings provide new insights into the pathogenesis of SARS, demonstrating the important role of CD4⁺ but not CD8⁺ T cells in primary SARS-CoV infection in this model.

Affiliations:

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to stream PascalFrancis, to step Curation: 000818
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Le document en format XML

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<front><div type="abstract" xml:lang="en">We characterized the cellular immune response to severe acute respiratory syndrome coronavirus (SARS-CoV) infection in 12- to 14-month-old BALB/c mice, a model that mimics features of the human disease. Following intranasal administration, the virus replicated in the lungs, with peak titers on day 2 postinfection. Enhanced production of cytokines (tumor necrosis factor alpha [TNF-α] and interleukin-6 [IL-6]) and chemokines (CXCL10, CCL2, CCL3, and CCL5) correlated with migration of NK cells, macrophages, and plasmacytoid dendritic cells (pDC) into the lungs. By day 7, histopathologic evidence of pneumonitis was seen in the lungs when viral clearance occurred. At this time, a second wave of enhanced production of cytokines (TNF-α, IL-6, gamma interferon [IFN-γ], IL-2, and IL-5), chemokines (CXCL9, CXCL10, CCL2, CCL3, and CCL5), and receptors (CXCR3, CCR2, and CCR5), was detected in the lungs, associated with an influx of T lymphocytes. Depletion of CD8<sup>+</sup>
 T cells at the time of infection did not affect viral replication or clearance. However, depletion of CD4<sup>+</sup>
 T cells resulted in an enhanced immune-mediated interstitial pneumonitis and delayed clearance of SARS-CoV from the lungs, which was associated with reduced neutralizing antibody and cytokine production and reduced pulmonary recruitment of lymphocytes. Innate defense mechanisms are able to control SARS-CoV infection in the absence of CD4<sup>+</sup>
 and CD8<sup>+</sup>
 T cells and antibodies. Our findings provide new insights into the pathogenesis of SARS, demonstrating the important role of CD4<sup>+</sup>
 but not CD8<sup>+</sup>
 T cells in primary SARS-CoV infection in this model.</div>
</front>
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<name sortKey="Zaki, Sherif R" sort="Zaki, Sherif R" uniqKey="Zaki S" first="Sherif R." last="Zaki">Sherif R. Zaki</name>
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Cellular Immune Responses to Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV) Infection in Senescent BALB/c Mice: CD4+ T Cells Are Important in Control of SARS-CoV Infection

Cellular Immune Responses to Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV) Infection in Senescent BALB/c Mice: CD4+ T Cells Are Important in Control of SARS-CoV Infection

Source :

Descripteurs français

English descriptors

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri