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Primary Severe Acute Respiratory Syndrome Coronavirus Infection Limits Replication but Not Lung Inflammation upon Homologous Rechallenge

Identifieur interne : 000043 ( PascalFrancis/Checkpoint ); précédent : 000042; suivant : 000044

Primary Severe Acute Respiratory Syndrome Coronavirus Infection Limits Replication but Not Lung Inflammation upon Homologous Rechallenge

Auteurs : Candice Clay [États-Unis] ; Nathan Donart [États-Unis] ; Ndingsa Fomukong [États-Unis] ; Jennifer B. Knight [États-Unis] ; WANLI LEI [États-Unis] ; Lance Price [États-Unis] ; Fletcher Hahn [États-Unis] ; Jesse Van Westrienen [États-Unis] ; Kevin S. Harrod [États-Unis]

Source :

RBID : Pascal:12-0189661

Descripteurs français

English descriptors

Abstract

Our knowledge regarding immune-protective and immunopathogenic events in severe acute respiratory syndrome coronavirus (SARS-CoV) infection is limited, and little is known about the dynamics of the immune response at the primary site of disease. Here, an African green monkey (AGM) model was used to elucidate immune mechanisms that facilitate viral clearance but may also contribute to persistent lung inflammation following SARS-CoV infection. During primary infection, SARS-CoV replicated in the AGM lung for up to 10 days. Interestingly, lung inflammation was more prevalent following viral clearance, as leukocyte numbers peaked at 14 days postinfection (dpi) and remained elevated at 28 dpi compared to those of mock-infected controls. Lung macrophages but not dendritic cells were rapidly activated, and both cell types had high activation marker expression at late infection time points. Lung proinflammatory cytokines were induced at 1 to 14 dpi, but most returned to baseline by 28 dpi except interleukin 12 (IL-12) and gamma interferon. In SARS-CoV homologous rechallenge studies, 11 of the 12 animals were free of replicating virus at day 5 after rechallenge. However, incidence and severity of lung inflammation was not reduced despite the limited viral replication upon rechallenge. Evaluating the role of antibodies in immune protection or potentiation revealed a progressive increase in anti-SARS-CoV antibodies in lung and serum that did not correlate temporally or spatially with enhanced viral replication. This study represents one of the first comprehensive analyses of lung immunity, including changes in leukocyte populations, lung-specific cytokines, and antibody responses following SARS-CoV rechallenge in AGMs.


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Pascal:12-0189661

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<div type="abstract" xml:lang="en">Our knowledge regarding immune-protective and immunopathogenic events in severe acute respiratory syndrome coronavirus (SARS-CoV) infection is limited, and little is known about the dynamics of the immune response at the primary site of disease. Here, an African green monkey (AGM) model was used to elucidate immune mechanisms that facilitate viral clearance but may also contribute to persistent lung inflammation following SARS-CoV infection. During primary infection, SARS-CoV replicated in the AGM lung for up to 10 days. Interestingly, lung inflammation was more prevalent following viral clearance, as leukocyte numbers peaked at 14 days postinfection (dpi) and remained elevated at 28 dpi compared to those of mock-infected controls. Lung macrophages but not dendritic cells were rapidly activated, and both cell types had high activation marker expression at late infection time points. Lung proinflammatory cytokines were induced at 1 to 14 dpi, but most returned to baseline by 28 dpi except interleukin 12 (IL-12) and gamma interferon. In SARS-CoV homologous rechallenge studies, 11 of the 12 animals were free of replicating virus at day 5 after rechallenge. However, incidence and severity of lung inflammation was not reduced despite the limited viral replication upon rechallenge. Evaluating the role of antibodies in immune protection or potentiation revealed a progressive increase in anti-SARS-CoV antibodies in lung and serum that did not correlate temporally or spatially with enhanced viral replication. This study represents one of the first comprehensive analyses of lung immunity, including changes in leukocyte populations, lung-specific cytokines, and antibody responses following SARS-CoV rechallenge in AGMs.</div>
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<fA60>
<s1>P</s1>
</fA60>
<fA61>
<s0>A</s0>
</fA61>
<fA64 i1="01" i2="1">
<s0>Journal of virology</s0>
</fA64>
<fA66 i1="01">
<s0>USA</s0>
</fA66>
<fC01 i1="01" l="ENG">
<s0>Our knowledge regarding immune-protective and immunopathogenic events in severe acute respiratory syndrome coronavirus (SARS-CoV) infection is limited, and little is known about the dynamics of the immune response at the primary site of disease. Here, an African green monkey (AGM) model was used to elucidate immune mechanisms that facilitate viral clearance but may also contribute to persistent lung inflammation following SARS-CoV infection. During primary infection, SARS-CoV replicated in the AGM lung for up to 10 days. Interestingly, lung inflammation was more prevalent following viral clearance, as leukocyte numbers peaked at 14 days postinfection (dpi) and remained elevated at 28 dpi compared to those of mock-infected controls. Lung macrophages but not dendritic cells were rapidly activated, and both cell types had high activation marker expression at late infection time points. Lung proinflammatory cytokines were induced at 1 to 14 dpi, but most returned to baseline by 28 dpi except interleukin 12 (IL-12) and gamma interferon. In SARS-CoV homologous rechallenge studies, 11 of the 12 animals were free of replicating virus at day 5 after rechallenge. However, incidence and severity of lung inflammation was not reduced despite the limited viral replication upon rechallenge. Evaluating the role of antibodies in immune protection or potentiation revealed a progressive increase in anti-SARS-CoV antibodies in lung and serum that did not correlate temporally or spatially with enhanced viral replication. This study represents one of the first comprehensive analyses of lung immunity, including changes in leukocyte populations, lung-specific cytokines, and antibody responses following SARS-CoV rechallenge in AGMs.</s0>
</fC01>
<fC02 i1="01" i2="X">
<s0>002A05C10</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE">
<s0>Coronavirus</s0>
<s2>NW</s2>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG">
<s0>Coronavirus</s0>
<s2>NW</s2>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA">
<s0>Coronavirus</s0>
<s2>NW</s2>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE">
<s0>Réplication</s0>
<s5>05</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG">
<s0>Replication</s0>
<s5>05</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA">
<s0>Replicación</s0>
<s5>05</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE">
<s0>Poumon</s0>
<s5>06</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG">
<s0>Lung</s0>
<s5>06</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA">
<s0>Pulmón</s0>
<s5>06</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE">
<s0>Inflammation</s0>
<s5>07</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG">
<s0>Inflammation</s0>
<s5>07</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA">
<s0>Inflamación</s0>
<s5>07</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE">
<s0>Syndrome respiratoire aigu sévère</s0>
<s2>NM</s2>
<s5>14</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG">
<s0>Severe acute respiratory syndrome</s0>
<s2>NM</s2>
<s5>14</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA">
<s0>Síndrome respiratorio agudo severo</s0>
<s2>NM</s2>
<s5>14</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE">
<s0>Coronaviridae</s0>
<s2>NW</s2>
</fC07>
<fC07 i1="01" i2="X" l="ENG">
<s0>Coronaviridae</s0>
<s2>NW</s2>
</fC07>
<fC07 i1="01" i2="X" l="SPA">
<s0>Coronaviridae</s0>
<s2>NW</s2>
</fC07>
<fC07 i1="02" i2="X" l="FRE">
<s0>Nidovirales</s0>
<s2>NW</s2>
</fC07>
<fC07 i1="02" i2="X" l="ENG">
<s0>Nidovirales</s0>
<s2>NW</s2>
</fC07>
<fC07 i1="02" i2="X" l="SPA">
<s0>Nidovirales</s0>
<s2>NW</s2>
</fC07>
<fC07 i1="03" i2="X" l="FRE">
<s0>Virus</s0>
<s2>NW</s2>
</fC07>
<fC07 i1="03" i2="X" l="ENG">
<s0>Virus</s0>
<s2>NW</s2>
</fC07>
<fC07 i1="03" i2="X" l="SPA">
<s0>Virus</s0>
<s2>NW</s2>
</fC07>
<fC07 i1="04" i2="X" l="FRE">
<s0>Pathologie de l'appareil respiratoire</s0>
<s5>13</s5>
</fC07>
<fC07 i1="04" i2="X" l="ENG">
<s0>Respiratory disease</s0>
<s5>13</s5>
</fC07>
<fC07 i1="04" i2="X" l="SPA">
<s0>Aparato respiratorio patología</s0>
<s5>13</s5>
</fC07>
<fC07 i1="05" i2="X" l="FRE">
<s0>Virose</s0>
</fC07>
<fC07 i1="05" i2="X" l="ENG">
<s0>Viral disease</s0>
</fC07>
<fC07 i1="05" i2="X" l="SPA">
<s0>Virosis</s0>
</fC07>
<fC07 i1="06" i2="X" l="FRE">
<s0>Infection</s0>
</fC07>
<fC07 i1="06" i2="X" l="ENG">
<s0>Infection</s0>
</fC07>
<fC07 i1="06" i2="X" l="SPA">
<s0>Infección</s0>
</fC07>
<fC07 i1="07" i2="X" l="FRE">
<s0>Pathologie des poumons</s0>
<s5>16</s5>
</fC07>
<fC07 i1="07" i2="X" l="ENG">
<s0>Lung disease</s0>
<s5>16</s5>
</fC07>
<fC07 i1="07" i2="X" l="SPA">
<s0>Pulmón patología</s0>
<s5>16</s5>
</fC07>
<fN21>
<s1>149</s1>
</fN21>
<fN44 i1="01">
<s1>OTO</s1>
</fN44>
<fN82>
<s1>OTO</s1>
</fN82>
</pA>
</standard>
</inist>
<affiliations>
<list>
<country>
<li>États-Unis</li>
</country>
<region>
<li>Nouveau-Mexique</li>
</region>
</list>
<tree>
<country name="États-Unis">
<region name="Nouveau-Mexique">
<name sortKey="Clay, Candice" sort="Clay, Candice" uniqKey="Clay C" first="Candice" last="Clay">Candice Clay</name>
</region>
<name sortKey="Donart, Nathan" sort="Donart, Nathan" uniqKey="Donart N" first="Nathan" last="Donart">Nathan Donart</name>
<name sortKey="Fomukong, Ndingsa" sort="Fomukong, Ndingsa" uniqKey="Fomukong N" first="Ndingsa" last="Fomukong">Ndingsa Fomukong</name>
<name sortKey="Hahn, Fletcher" sort="Hahn, Fletcher" uniqKey="Hahn F" first="Fletcher" last="Hahn">Fletcher Hahn</name>
<name sortKey="Harrod, Kevin S" sort="Harrod, Kevin S" uniqKey="Harrod K" first="Kevin S." last="Harrod">Kevin S. Harrod</name>
<name sortKey="Knight, Jennifer B" sort="Knight, Jennifer B" uniqKey="Knight J" first="Jennifer B." last="Knight">Jennifer B. Knight</name>
<name sortKey="Price, Lance" sort="Price, Lance" uniqKey="Price L" first="Lance" last="Price">Lance Price</name>
<name sortKey="Van Westrienen, Jesse" sort="Van Westrienen, Jesse" uniqKey="Van Westrienen J" first="Jesse" last="Van Westrienen">Jesse Van Westrienen</name>
<name sortKey="Wanli Lei" sort="Wanli Lei" uniqKey="Wanli Lei" last="Wanli Lei">WANLI LEI</name>
</country>
</tree>
</affiliations>
</record>

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