Co‐infection of respiratory bacterium with severe acute respiratory syndrome coronavirus induces an exacerbated pneumonia in mice
Identifieur interne : 003D91 ( Ncbi/Curation ); précédent : 003D90; suivant : 003D92Co‐infection of respiratory bacterium with severe acute respiratory syndrome coronavirus induces an exacerbated pneumonia in mice
Auteurs : Yasushi Ami ; Noriyo Nagata ; Kazuya Shirato ; Rie Watanabe ; Naoko Iwata ; Keiko Nakagaki ; Shuetsu Fukushi ; Masayuki Saijo ; Shigeru Morikawa ; Fumihiro TaguchiSource :
- Microbiology and Immunology [ 0385-5600 ] ; 2008.
Abstract
SARS‐CoV grows in a variety of tissues that express its receptor, although the mechanism for high replication in the lungs and severe respiratory illness is not well understood. We recently showed that elastase enhances SARS‐CoV infection in cultured cells, which suggests that SARS development may be due to elastase‐mediated, enhanced SARS‐CoV infection in the lungs. To explore this possibility, we examined whether co‐infection of mice with SARS‐CoV and
Url:
DOI: 10.1111/j.1348-0421.2008.00011.x
PubMed: NONE
PubMed Central: 7168413
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PMC:7168413Le document en format XML
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<author><name sortKey="Shirato, Kazuya" sort="Shirato, Kazuya" uniqKey="Shirato K" first="Kazuya" last="Shirato">Kazuya Shirato</name>
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<front><div type="abstract" xml:lang="en"><title>ABSTRACT</title>
<p>SARS‐CoV grows in a variety of tissues that express its receptor, although the mechanism for high replication in the lungs and severe respiratory illness is not well understood. We recently showed that elastase enhances SARS‐CoV infection in cultured cells, which suggests that SARS development may be due to elastase‐mediated, enhanced SARS‐CoV infection in the lungs. To explore this possibility, we examined whether co‐infection of mice with SARS‐CoV and <italic>Pp,</italic>
a low‐pathogenic bacterium which elicits elastase production in the lungs, induces exacerbation of pneumonia. Mice co‐infected with SARS‐CoV and <italic>Pp</italic>
developed severe respiratory disease with extensive weight loss, resulting in a 33∼90% mortality rate. Mice with exacerbated pneumonia showed enhanced virus infection in the lungs and histopathological lesions similar to those found in human SARS cases. Intranasal administration of LPS, another elastase inducer, showed an effect similar to that of <italic>Pp</italic>
infection. Thus, this study shows that exacerbated pneumonia in mice results from co‐infection with SARS‐CoV and a respiratory bacterium that induces elastase production in the lungs, suggesting a possible role for elastase in the exacerbation of pneumonia.</p>
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