Effects of severe acute respiratory syndrome (SARS) coronavirus infection on peripheral blood lymphocytes and their subsets
Identifieur interne : 005181 ( Main/Merge ); précédent : 005180; suivant : 005182Effects of severe acute respiratory syndrome (SARS) coronavirus infection on peripheral blood lymphocytes and their subsets
Auteurs : ZHONGPING HE [République populaire de Chine] ; CHUNHUI ZHAO [République populaire de Chine] ; QINGMING DONG [République populaire de Chine] ; HUI ZHUANG [République populaire de Chine] ; SHUJING SONG [République populaire de Chine] ; GUOAI PENG [République populaire de Chine] ; Dominic E. Dwyer [Australie]Source :
- International journal of infectious diseases [ 1201-9712 ] ; 2005.
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Abstract
Introduction: Severe acute respiratory syndrome (SARS) caused large outbreaks of atypical pneumonia in 2003, with the largest localized outbreak occurring in Beijing, China. Lymphopenia was prominent amongst the laboratory abnormalities reported in acute SARS. Methods: The effect of SARS on peripheral blood lymphocytes and their subsets was examined in 271 SARS coronavirus-infected individuals. Results: There was a significant decrease in the CD45+, CD3+, CD4+, CD8+, CD19+ and CD16+/56+ cell counts over the five weeks of the SARS illness although CD4+/CD8+ ratios did not change significantly. The lymphopenia was prolonged, reaching a nadir during days 7-9 in the second week of illness before returning towards normal after five weeks, with the lowest mean CD4+ cell count of 317 cells x 106/L at day 7, and CD8+ cell count of 239 cells × 106/L at day 8. Patients with more severe clinical illness, or patients who died, had significantly more profound CD4+ and CD8+ lymphopenia. Discussion: Lymphopenia is a prominent part of SARS-CoV infection and lymphocyte counts may be useful in predicting the severity and clinical outcomes. Possible reasons for the SARS-associated lymphopenia may be direct infection of lymphocytes by SARS-CoV, lymphocyte sequestration in the lung or cytokine-mediated lymphocyte trafficking. There may also be immune-mediated lymphocyte destruction, bone marrow or thymus suppression, or apoptosis.
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Effects of severe acute respiratory syndrome (SARS) coronavirus infection on peripheral blood lymphocytes and their subsets</title>
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<series><title level="j" type="main">International journal of infectious diseases</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Bacteremia</term>
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<term>Severe acute respiratory syndrome</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Syndrome respiratoire aigu sévère</term>
<term>Bactériémie</term>
<term>Lymphopénie</term>
<term>Sous population cellulaire</term>
<term>Lymphocyte</term>
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<front><div type="abstract" xml:lang="en">Introduction: Severe acute respiratory syndrome (SARS) caused large outbreaks of atypical pneumonia in 2003, with the largest localized outbreak occurring in Beijing, China. Lymphopenia was prominent amongst the laboratory abnormalities reported in acute SARS. Methods: The effect of SARS on peripheral blood lymphocytes and their subsets was examined in 271 SARS coronavirus-infected individuals. Results: There was a significant decrease in the CD45+, CD3+, CD4+, CD8+, CD19+ and CD16+/56+ cell counts over the five weeks of the SARS illness although CD4+/CD8+ ratios did not change significantly. The lymphopenia was prolonged, reaching a nadir during days 7-9 in the second week of illness before returning towards normal after five weeks, with the lowest mean CD4+ cell count of 317 cells x 10<sup>6</sup>
/L at day 7, and CD8+ cell count of 239 cells × 10<sup>6</sup>
/L at day 8. Patients with more severe clinical illness, or patients who died, had significantly more profound CD4+ and CD8+ lymphopenia. Discussion: Lymphopenia is a prominent part of SARS-CoV infection and lymphocyte counts may be useful in predicting the severity and clinical outcomes. Possible reasons for the SARS-associated lymphopenia may be direct infection of lymphocytes by SARS-CoV, lymphocyte sequestration in the lung or cytokine-mediated lymphocyte trafficking. There may also be immune-mediated lymphocyte destruction, bone marrow or thymus suppression, or apoptosis.</div>
</front>
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<tree><country name="République populaire de Chine"><noRegion><name sortKey="Zhongping He" sort="Zhongping He" uniqKey="Zhongping He" last="Zhongping He">ZHONGPING HE</name>
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<name sortKey="Qingming Dong" sort="Qingming Dong" uniqKey="Qingming Dong" last="Qingming Dong">QINGMING DONG</name>
<name sortKey="Shujing Song" sort="Shujing Song" uniqKey="Shujing Song" last="Shujing Song">SHUJING SONG</name>
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<country name="Australie"><noRegion><name sortKey="Dwyer, Dominic E" sort="Dwyer, Dominic E" uniqKey="Dwyer D" first="Dominic E." last="Dwyer">Dominic E. Dwyer</name>
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