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Severe acute respiratory syndrome coronavirus 3C-like protease-induced apoptosis

Identifieur interne : 004414 ( Main/Exploration ); précédent : 004413; suivant : 004415

Severe acute respiratory syndrome coronavirus 3C-like protease-induced apoptosis

Auteurs : Cheng-Wen Lin [Taïwan] ; Kuan-Hsun Lin [Taïwan] ; Tsung-Han Hsieh [Taïwan] ; Shi-Yi Shiu [Taïwan] ; Jeng-Yi Li [Taïwan]

Source :

RBID : Pascal:06-0198935

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English descriptors

Abstract

The pathogenesis of severe acute respiratory syndrome-associated coronavirus (SARS-CoV) is an important issue for the treatment and prevention of severe acute respiratory syndrome. Recently, SARS-CoV has been demonstrated to induce cell apoptosis in Vero-E6 cells. The possible role of SARS-CoV 3C-like protease (3CLpro) in virus-induced apoptosis is characterized in this study. Growth arrest and apoptosis via caspase-3 and caspase-9 activities were demonstrated in SARS-CoV 3CLpro-expressing human promonocyte cells. The fluorescence intensity of dihydrorhodamine 123 staining indicated that cellular reactive oxygen species were markedly increased in SARS-CoV 3CLpro-expressing cells. Moreover, in vivo signalling pathway assay indicated that 3CLpro increased the activation of the nuclear factor-kappa B-dependent reporter, but inhibited activator protein-1-dependent transcription. This finding is likely to be responsible for virus-induced apoptotic signalling.

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Le document en format XML

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<term>Annexin A5 (chemistry)</term>
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<term>Apoptosis (immunology)</term>
<term>Caspase 3</term>
<term>Caspase 9</term>
<term>Caspases (metabolism)</term>
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<term>Protéines virales (génétique)</term>
<term>Protéines virales (immunologie)</term>
<term>Rhodamines ()</term>
<term>Syndrome respiratoire aigu sévère (virologie)</term>
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<front>
<div type="abstract" xml:lang="en">The pathogenesis of severe acute respiratory syndrome-associated coronavirus (SARS-CoV) is an important issue for the treatment and prevention of severe acute respiratory syndrome. Recently, SARS-CoV has been demonstrated to induce cell apoptosis in Vero-E6 cells. The possible role of SARS-CoV 3C-like protease (3CL
<sup>pro</sup>
) in virus-induced apoptosis is characterized in this study. Growth arrest and apoptosis via caspase-3 and caspase-9 activities were demonstrated in SARS-CoV 3CL
<sup>pro</sup>
-expressing human promonocyte cells. The fluorescence intensity of dihydrorhodamine 123 staining indicated that cellular reactive oxygen species were markedly increased in SARS-CoV 3CL
<sup>pro</sup>
-expressing cells. Moreover, in vivo signalling pathway assay indicated that 3CL
<sup>pro</sup>
increased the activation of the nuclear factor-kappa B-dependent reporter, but inhibited activator protein-1-dependent transcription. This finding is likely to be responsible for virus-induced apoptotic signalling.</div>
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<name sortKey="Lin, Cheng Wen" sort="Lin, Cheng Wen" uniqKey="Lin C" first="Cheng-Wen" last="Lin">Cheng-Wen Lin</name>
<name sortKey="Lin, Kuan Hsun" sort="Lin, Kuan Hsun" uniqKey="Lin K" first="Kuan-Hsun" last="Lin">Kuan-Hsun Lin</name>
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