Serveur d'exploration MERS

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Comparative and kinetic analysis of viral shedding and immunological responses in MERS patients representing a broad spectrum of disease severity

Identifieur interne : 001330 ( Main/Exploration ); précédent : 001329; suivant : 001331

Comparative and kinetic analysis of viral shedding and immunological responses in MERS patients representing a broad spectrum of disease severity

Auteurs : Chan-Ki Min ; Shinhye Cheon [Corée du Sud] ; Na-Young Ha ; Kyung Mok Sohn [Corée du Sud] ; Yuri Kim ; Abdimadiyeva Aigerim ; Hyun Mu Shin ; Ji-Yeob Choi ; Kyung-Soo Inn ; Jin-Hwan Kim [Corée du Sud] ; Jae Young Moon [Corée du Sud] ; Myung-Sik Choi ; Nam-Hyuk Cho ; Yeon-Sook Kim [Corée du Sud]

Source :

RBID : PMC:4857172

Descripteurs français

English descriptors

Abstract

Despite the ongoing spread of MERS, there is limited knowledge of the factors affecting its severity and outcomes. We analyzed clinical data and specimens from fourteen MERS patients treated in a hospital who collectively represent a wide spectrum of disease severity, ranging from mild febrile illness to fatal pneumonia, and classified the patients into four groups based on severity and mortality. Comparative and kinetic analyses revealed that high viral loads, weak antibody responses, and lymphopenia accompanying thrombocytopenia were associated with disease mortality, whereas persistent and gradual increases in lymphocyte responses might be required for effective immunity against MERS-CoV infection. Leukocytosis, primarily due to increased neutrophils and monocytes, was generally observed in more severe and fatal cases. The blood levels of cytokines such as IL-10, IL-15, TGF-β, and EGF were either positively or negatively correlated with disease mortality. Robust induction of various chemokines with differential kinetics was more prominent in patients that recovered from pneumonia than in patients with mild febrile illness or deceased patients. The correlation of the virological and immunological responses with disease severity and mortality, as well as their responses to current antiviral therapy, may have prognostic significance during the early phase of MERS.

Supplementary information

The online version of this article (doi:10.1038/srep25359) contains supplementary material, which is available to authorized users.


Url:
DOI: 10.1038/srep25359
PubMed: 27146253
PubMed Central: 4857172


Affiliations:


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<p id="Par1">Despite the ongoing spread of MERS, there is limited knowledge of the factors affecting its severity and outcomes. We analyzed clinical data and specimens from fourteen MERS patients treated in a hospital who collectively represent a wide spectrum of disease severity, ranging from mild febrile illness to fatal pneumonia, and classified the patients into four groups based on severity and mortality. Comparative and kinetic analyses revealed that high viral loads, weak antibody responses, and lymphopenia accompanying thrombocytopenia were associated with disease mortality, whereas persistent and gradual increases in lymphocyte responses might be required for effective immunity against MERS-CoV infection. Leukocytosis, primarily due to increased neutrophils and monocytes, was generally observed in more severe and fatal cases. The blood levels of cytokines such as IL-10, IL-15, TGF-β, and EGF were either positively or negatively correlated with disease mortality. Robust induction of various chemokines with differential kinetics was more prominent in patients that recovered from pneumonia than in patients with mild febrile illness or deceased patients. The correlation of the virological and immunological responses with disease severity and mortality, as well as their responses to current antiviral therapy, may have prognostic significance during the early phase of MERS.</p>
<sec>
<title>Supplementary information</title>
<p>The online version of this article (doi:10.1038/srep25359) contains supplementary material, which is available to authorized users.</p>
</sec>
</div>
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