Participation of both host and virus factors in induction of severe acute respiratory syndrome (SARS) in F344 Rats infected with SARS coronavirus
Identifieur interne : 003B48 ( Main/Exploration ); précédent : 003B47; suivant : 003B49Participation of both host and virus factors in induction of severe acute respiratory syndrome (SARS) in F344 Rats infected with SARS coronavirus
Auteurs : Noriyo Nagata [Japon] ; Naoko Iwata [Japon] ; Hideki Hasegawa [Japon] ; Shuetsu Fukushi [Japon] ; Masaru Yokoyama [Japon] ; Ayako Harashima [Japon] ; Yuko Sato [Japon] ; Masayuki Saijo [Japon] ; Shigeru Morikawa [Japon] ; Tetsutaro Sata [Japon]Source :
- Journal of virology [ 0022-538X ] ; 2007.
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Abstract
To understand the pathogenesis and develop an animal model of severe acute respiratory syndrome (SARS)-associated coronavirus (SARS-CoV), the Frankfurt 1 SARS-CoV isolate was passaged serially in young F344 rats. Young rats were susceptible to SARS-CoV but cleared the virus rapidly within 3 to 5 days of intranasal inoculation. After 10 serial passages, replication and virulence of SARS-CoV were increased in the respiratory tract of young rats without clinical signs. By contrast, adult rats infected with the passaged virus showed respiratory symptoms and severe pathological lesions in the lung. Levels of inflammatory cytokines in sera and lung tissues were significantly higher in adult F344 rats than in young rats. During in vivo passage of SARS-CoV, a single amino acid substitution was introduced within the binding domain of the viral spike protein recognizing angiotensin-converting enzyme 2 (ACE2), which is known as a SARS-CoV receptor. The rat-passaged virus more efficiently infected CHO cells expressing rat ACE2 than did the original isolate. These results strongly indicate that host and virus factors such as advanced age and virus adaptation are critical for the development of SARS in rats.
Affiliations:
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Infectious Diseases</s1><s2>Tokyo</s2><s3>JPN</s3><sZ>4 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ></inist:fA14><country>Japon</country><placeName><settlement type="city">Tokyo</settlement><region type="région">Région de Kantō</region></placeName></affiliation></author><author><name sortKey="Sata, Tetsutaro" sort="Sata, Tetsutaro" uniqKey="Sata T" first="Tetsutaro" last="Sata">Tetsutaro Sata</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Department of Pathology, National Institute of Infectious Diseases</s1><s2>Tokyo</s2><s3>JPN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ><sZ>10 aut.</sZ></inist:fA14><country>Japon</country><placeName><settlement type="city">Tokyo</settlement><region type="région">Région de Kantō</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of virology</title><title level="j" type="abbreviated">J. virol.</title><idno type="ISSN">0022-538X</idno><imprint><date when="2007">2007</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of virology</title><title level="j" type="abbreviated">J. virol.</title><idno type="ISSN">0022-538X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Rat coronavirus</term><term>Severe acute respiratory syndrome</term><term>Severe acute respiratory syndrome virus</term><term>Virology</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Virus syndrome respiratoire aigu sévère</term><term>Coronavirus rat</term><term>Virologie</term><term>Syndrome respiratoire aigu sévère</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">To understand the pathogenesis and develop an animal model of severe acute respiratory syndrome (SARS)-associated coronavirus (SARS-CoV), the Frankfurt 1 SARS-CoV isolate was passaged serially in young F344 rats. Young rats were susceptible to SARS-CoV but cleared the virus rapidly within 3 to 5 days of intranasal inoculation. After 10 serial passages, replication and virulence of SARS-CoV were increased in the respiratory tract of young rats without clinical signs. By contrast, adult rats infected with the passaged virus showed respiratory symptoms and severe pathological lesions in the lung. Levels of inflammatory cytokines in sera and lung tissues were significantly higher in adult F344 rats than in young rats. During in vivo passage of SARS-CoV, a single amino acid substitution was introduced within the binding domain of the viral spike protein recognizing angiotensin-converting enzyme 2 (ACE2), which is known as a SARS-CoV receptor. The rat-passaged virus more efficiently infected CHO cells expressing rat ACE2 than did the original isolate. These results strongly indicate that host and virus factors such as advanced age and virus adaptation are critical for the development of SARS in rats.</div></front></TEI><affiliations><list><country><li>Japon</li></country><region><li>Région de Kantō</li></region><settlement><li>Tokyo</li></settlement></list><tree><country name="Japon"><region name="Région de Kantō"><name sortKey="Nagata, Noriyo" sort="Nagata, Noriyo" uniqKey="Nagata N" first="Noriyo" last="Nagata">Noriyo Nagata</name></region><name sortKey="Fukushi, Shuetsu" sort="Fukushi, Shuetsu" uniqKey="Fukushi S" first="Shuetsu" last="Fukushi">Shuetsu Fukushi</name><name sortKey="Harashima, Ayako" sort="Harashima, Ayako" uniqKey="Harashima A" first="Ayako" last="Harashima">Ayako Harashima</name><name sortKey="Hasegawa, Hideki" sort="Hasegawa, Hideki" uniqKey="Hasegawa H" first="Hideki" last="Hasegawa">Hideki Hasegawa</name><name sortKey="Iwata, Naoko" sort="Iwata, Naoko" uniqKey="Iwata N" first="Naoko" last="Iwata">Naoko Iwata</name><name sortKey="Morikawa, Shigeru" sort="Morikawa, Shigeru" uniqKey="Morikawa S" first="Shigeru" last="Morikawa">Shigeru Morikawa</name><name sortKey="Saijo, Masayuki" sort="Saijo, Masayuki" uniqKey="Saijo M" first="Masayuki" last="Saijo">Masayuki Saijo</name><name sortKey="Sata, Tetsutaro" sort="Sata, Tetsutaro" uniqKey="Sata T" first="Tetsutaro" last="Sata">Tetsutaro Sata</name><name sortKey="Sato, Yuko" sort="Sato, Yuko" uniqKey="Sato Y" first="Yuko" last="Sato">Yuko Sato</name><name sortKey="Yokoyama, Masaru" sort="Yokoyama, Masaru" uniqKey="Yokoyama M" first="Masaru" last="Yokoyama">Masaru Yokoyama</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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