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      Impaired immune response mediated by prostaglandin E2 promotes severe COVID-19 disease

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          Abstract

          The SARS-CoV-2 coronavirus has led to a pandemic with millions of people affected. The present study finds that risk-factors for severe COVID-19 disease courses, i.e. male sex, older age and sedentary life style are associated with higher prostaglandin E2 (PGE2) serum levels in blood samples from unaffected subjects. In COVID-19 patients, PGE2 blood levels are markedly elevated and correlate positively with disease severity. SARS-CoV-2 induces PGE2 generation and secretion in infected lung epithelial cells by upregulating cyclo-oxygenase (COX)-2 and reducing the PG-degrading enzyme 15-hydroxyprostaglandin-dehydrogenase. Also living human precision cut lung slices (PCLS) infected with SARS-CoV-2 display upregulated COX-2. Regular exercise in aged individuals lowers PGE2 serum levels, which leads to increased Paired-Box-Protein-Pax-5 (PAX5) expression, a master regulator of B-cell survival, proliferation and differentiation also towards long lived memory B-cells, in human pre-B-cell lines. Moreover, PGE2 levels in serum of COVID-19 patients lowers the expression of PAX5 in human pre-B-cell lines. The PGE2 inhibitor Taxifolin reduces SARS-CoV-2-induced PGE2 production. In conclusion, SARS-CoV-2, male sex, old age, and sedentary life style increase PGE2 levels, which may reduce the early anti-viral defense as well as the development of immunity promoting severe disease courses and multiple infections. Regular exercise and Taxifolin treatment may reduce these risks and prevent severe disease courses.

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          COVID-19: consider cytokine storm syndromes and immunosuppression

          As of March 12, 2020, coronavirus disease 2019 (COVID-19) has been confirmed in 125 048 people worldwide, carrying a mortality of approximately 3·7%, 1 compared with a mortality rate of less than 1% from influenza. There is an urgent need for effective treatment. Current focus has been on the development of novel therapeutics, including antivirals and vaccines. Accumulating evidence suggests that a subgroup of patients with severe COVID-19 might have a cytokine storm syndrome. We recommend identification and treatment of hyperinflammation using existing, approved therapies with proven safety profiles to address the immediate need to reduce the rising mortality. Current management of COVID-19 is supportive, and respiratory failure from acute respiratory distress syndrome (ARDS) is the leading cause of mortality. 2 Secondary haemophagocytic lymphohistiocytosis (sHLH) is an under-recognised, hyperinflammatory syndrome characterised by a fulminant and fatal hypercytokinaemia with multiorgan failure. In adults, sHLH is most commonly triggered by viral infections 3 and occurs in 3·7–4·3% of sepsis cases. 4 Cardinal features of sHLH include unremitting fever, cytopenias, and hyperferritinaemia; pulmonary involvement (including ARDS) occurs in approximately 50% of patients. 5 A cytokine profile resembling sHLH is associated with COVID-19 disease severity, characterised by increased interleukin (IL)-2, IL-7, granulocyte-colony stimulating factor, interferon-γ inducible protein 10, monocyte chemoattractant protein 1, macrophage inflammatory protein 1-α, and tumour necrosis factor-α. 6 Predictors of fatality from a recent retrospective, multicentre study of 150 confirmed COVID-19 cases in Wuhan, China, included elevated ferritin (mean 1297·6 ng/ml in non-survivors vs 614·0 ng/ml in survivors; p 39·4°C 49 Organomegaly None 0 Hepatomegaly or splenomegaly 23 Hepatomegaly and splenomegaly 38 Number of cytopenias * One lineage 0 Two lineages 24 Three lineages 34 Triglycerides (mmol/L) 4·0 mmol/L 64 Fibrinogen (g/L) >2·5 g/L 0 ≤2·5 g/L 30 Ferritin ng/ml 6000 ng/ml 50 Serum aspartate aminotransferase <30 IU/L 0 ≥30 IU/L 19 Haemophagocytosis on bone marrow aspirate No 0 Yes 35 Known immunosuppression † No 0 Yes 18 The Hscore 11 generates a probability for the presence of secondary HLH. HScores greater than 169 are 93% sensitive and 86% specific for HLH. Note that bone marrow haemophagocytosis is not mandatory for a diagnosis of HLH. HScores can be calculated using an online HScore calculator. 11 HLH=haemophagocytic lymphohistiocytosis. * Defined as either haemoglobin concentration of 9·2 g/dL or less (≤5·71 mmol/L), a white blood cell count of 5000 white blood cells per mm3 or less, or platelet count of 110 000 platelets per mm3 or less, or all of these criteria combined. † HIV positive or receiving longterm immunosuppressive therapy (ie, glucocorticoids, cyclosporine, azathioprine).
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            Virological assessment of hospitalized patients with COVID-2019

            Coronavirus disease 2019 (COVID-19) is an acute infection of the respiratory tract that emerged in late 20191,2. Initial outbreaks in China involved 13.8% of cases with severe courses, and 6.1% of cases with critical courses3. This severe presentation may result from the virus using a virus receptor that is expressed predominantly in the lung2,4; the same receptor tropism is thought to have determined the pathogenicity-but also aided in the control-of severe acute respiratory syndrome (SARS) in 20035. However, there are reports of cases of COVID-19 in which the patient shows mild upper respiratory tract symptoms, which suggests the potential for pre- or oligosymptomatic transmission6-8. There is an urgent need for information on virus replication, immunity and infectivity in specific sites of the body. Here we report a detailed virological analysis of nine cases of COVID-19 that provides proof of active virus replication in tissues of the upper respiratory tract. Pharyngeal virus shedding was very high during the first week of symptoms, with a peak at 7.11 × 108 RNA copies per throat swab on day 4. Infectious virus was readily isolated from samples derived from the throat or lung, but not from stool samples-in spite of high concentrations of virus RNA. Blood and urine samples never yielded virus. Active replication in the throat was confirmed by the presence of viral replicative RNA intermediates in the throat samples. We consistently detected sequence-distinct virus populations in throat and lung samples from one patient, proving independent replication. The shedding of viral RNA from sputum outlasted the end of symptoms. Seroconversion occurred after 7 days in 50% of patients (and by day 14 in all patients), but was not followed by a rapid decline in viral load. COVID-19 can present as a mild illness of the upper respiratory tract. The confirmation of active virus replication in the upper respiratory tract has implications for the containment of COVID-19.
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              Pulmonary Vascular Endothelialitis, Thrombosis, and Angiogenesis in Covid-19

              Progressive respiratory failure is the primary cause of death in the coronavirus disease 2019 (Covid-19) pandemic. Despite widespread interest in the pathophysiology of the disease, relatively little is known about the associated morphologic and molecular changes in the peripheral lung of patients who die from Covid-19.
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                Author and article information

                Contributors
                Role: ConceptualizationRole: Data curationRole: Formal analysisRole: Funding acquisitionRole: InvestigationRole: MethodologyRole: Project administrationRole: SupervisionRole: ValidationRole: VisualizationRole: Writing – original draftRole: Writing – review & editing
                Role: ConceptualizationRole: Data curationRole: Formal analysisRole: InvestigationRole: MethodologyRole: ValidationRole: VisualizationRole: Writing – original draftRole: Writing – review & editing
                Role: InvestigationRole: MethodologyRole: ResourcesRole: Writing – original draft
                Role: InvestigationRole: MethodologyRole: ResourcesRole: Writing – original draft
                Role: Data curation
                Role: InvestigationRole: MethodologyRole: ResourcesRole: Writing – review & editing
                Role: Formal analysisRole: InvestigationRole: MethodologyRole: ResourcesRole: VisualizationRole: Writing – review & editing
                Role: Formal analysisRole: Funding acquisitionRole: InvestigationRole: MethodologyRole: Project administrationRole: ResourcesRole: SupervisionRole: ValidationRole: Writing – review & editing
                Role: ConceptualizationRole: Funding acquisitionRole: MethodologyRole: SupervisionRole: Writing – review & editing
                Role: ResourcesRole: Writing – review & editing
                Role: Funding acquisitionRole: ResourcesRole: Writing – review & editing
                Role: InvestigationRole: Resources
                Role: ConceptualizationRole: Funding acquisitionRole: Resources
                Role: Data curationRole: Writing – review & editing
                Role: InvestigationRole: MethodologyRole: Writing – original draftRole: Writing – review & editing
                Role: Funding acquisitionRole: InvestigationRole: Writing – review & editing
                Role: Data curationRole: Formal analysisRole: InvestigationRole: MethodologyRole: ResourcesRole: ValidationRole: VisualizationRole: Writing – original draftRole: Writing – review & editing
                Role: Funding acquisitionRole: ResourcesRole: SupervisionRole: Writing – original draftRole: Writing – review & editing
                Role: ConceptualizationRole: Data curationRole: Formal analysisRole: Funding acquisitionRole: InvestigationRole: MethodologyRole: Project administrationRole: ResourcesRole: SupervisionRole: ValidationRole: VisualizationRole: Writing – original draftRole: Writing – review & editing
                Role: Data curationRole: InvestigationRole: Project administrationRole: Writing – review & editing
                Role: ConceptualizationRole: InvestigationRole: Project administrationRole: ResourcesRole: Writing – review & editing
                Role: Data curationRole: InvestigationRole: ResourcesRole: Writing – review & editing
                Role: Data curationRole: Visualization
                Role: Funding acquisitionRole: MethodologyRole: ResourcesRole: Writing – review & editing
                Role: ConceptualizationRole: Funding acquisitionRole: Writing – review & editing
                Role: Data curationRole: InvestigationRole: ResourcesRole: Writing – review & editing
                Role: MethodologyRole: ResourcesRole: Writing – review & editing
                Role: ConceptualizationRole: InvestigationRole: MethodologyRole: ResourcesRole: Writing – review & editing
                Role: ConceptualizationRole: Data curationRole: Formal analysisRole: Funding acquisitionRole: InvestigationRole: MethodologyRole: Project administrationRole: SupervisionRole: ValidationRole: VisualizationRole: Writing – original draftRole: Writing – review & editing
                Role: Editor
                Journal
                PLoS One
                PLoS One
                plos
                PLoS ONE
                Public Library of Science (San Francisco, CA USA )
                1932-6203
                4 August 2021
                2021
                4 August 2021
                : 16
                : 8
                : e0255335
                Affiliations
                [1 ] Department of Cardiology and Angiology, Hannover Medical School, Hanover, Germany
                [2 ] Institute of Experimental Virology, TWINCORE, Center for Experimental and Clinical Infection Research Hannover, Hanover, Germany
                [3 ] German Center for Infection Research, Hanover-Braunschweig Site, Braunschweig, Germany
                [4 ] Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hanover, Germany
                [5 ] Department of Clinical Microbiology, Virology & Wallenberg Centre for Molecular Medicine (WCMM), Umeå University, Umeå, Sweden
                [6 ] Department of Biochemistry, University of Veterinary Medicine Hannover, Hanover Germany
                [7 ] Pole of Pharmacology and Therapeutics, Institut de Recherche Expérimentale et Clinique, and Cliniques Universitaires Saint-Luc, Université catholique de Louvain (UCLouvain), Brussels, Belgium
                [8 ] Department of Experimental Oncology, European Institute of Oncology IRCCS, Milan, Italy
                [9 ] Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Torino, Italy
                [10 ] Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine in Hannover (TiHo), Hannover, Germany
                [11 ] Biomedical Research in Endstage and Obstructive Lung Disease (BREATH), German Center for Lung Research, Hanover, Germany
                [12 ] Institute for Pathology, Hannover Medical School, Hanover, Germany
                [13 ] Institute of Sports Medicine, Hannover Medical School, Hanover, Germany
                [14 ] Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hanover, Germany
                [15 ] Hannover Unified Biobank (HUB), Hannover Medical School, Hanover, Germany
                [16 ] Institute of Experimental Hematology, Hannover Medical School, Hanover, Germany
                [17 ] Division of Hematology and Oncology, Boston Children’s Hospital, Harvard Medical School, Boston, MA, United States of America
                [18 ] Department of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hanover, Germany
                [19 ] Department of Cardiovascular Complications of Oncologic Therapies, Medical Faculty of the Philipps University Marburg, Marburg, Germany
                Instituto Butantan, BRAZIL
                Author notes

                Competing Interests: The authors have declared that no competing interests exist.

                ‡ SIGR and MK contributed equally to this work as first co-authors.

                Author information
                https://orcid.org/0000-0001-5479-2275
                https://orcid.org/0000-0002-1326-5038
                https://orcid.org/0000-0003-1669-5911
                https://orcid.org/0000-0003-1243-0967
                Article
                PONE-D-21-08028
                10.1371/journal.pone.0255335
                8336874
                34347801
                6c61cae6-f8b5-4eb1-9404-0fb8b439f6c4
                © 2021 Ricke-Hoch et al

                This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                : 11 March 2021
                : 14 July 2021
                Page count
                Figures: 6, Tables: 1, Pages: 24
                Funding
                Funded by: funder-id http://dx.doi.org/10.13039/501100001659, Deutsche Forschungsgemeinschaft;
                Award ID: HI 842/3-2
                Award Recipient :
                Funded by: funder-id http://dx.doi.org/10.13039/501100001659, Deutsche Forschungsgemeinschaft;
                Award ID: HI 842/10-1
                Award Recipient :
                Funded by: funder-id http://dx.doi.org/10.13039/501100001659, Deutsche Forschungsgemeinschaft;
                Award ID: HI 842/10-2
                Award Recipient :
                Funded by: funder-id http://dx.doi.org/10.13039/501100001659, Deutsche Forschungsgemeinschaft;
                Award ID: RI 2531/2-1
                Award Recipient :
                Funded by: funder-id http://dx.doi.org/10.13039/501100001659, Deutsche Forschungsgemeinschaft;
                Award ID: RI 2531/2-2
                Award Recipient :
                Funded by: funder-id http://dx.doi.org/10.13039/100011937, Niedersächsische Ministerium für Wissenschaft und Kultur;
                Award ID: REBIRTH I/II
                Award Recipient :
                Funded by: Foundation Leducq
                Award ID: ID 19CVD02
                Award Recipient :
                Funded by: foundation leducq
                Award ID: ID 19CVD02
                Award Recipient :
                Funded by: funder-id http://dx.doi.org/10.13039/501100001659, Deutsche Forschungsgemeinschaft;
                Award ID: EXC 2155 RESIST
                Award Recipient :
                Funded by: The DEFEAT PANDEMIcs
                Award ID: AP6-9
                Award Recipient :
                Funded by: The DEFEAT PANDEMIcs
                Award ID: AP6-9
                Award Recipient :
                Funded by: funder-id http://dx.doi.org/10.13039/501100001659, Deutsche Forschungsgemeinschaft;
                Award ID: GE 2145/3-2
                Award Recipient :
                Funded by: funder-id http://dx.doi.org/10.13039/501100001659, Deutsche Forschungsgemeinschaft;
                Award ID: Project 158989968
                Award Recipient :
                Funded by: niedersächsische ministerium für wissenschaft und kultur and volkswagen foundation
                Award ID: Project 76251-99-3/19
                Award Recipient :
                Funded by: the knut and alice wallenberg foundation
                Award Recipient :
                Funded by: funder-id http://dx.doi.org/10.13039/100010663, H2020 European Research Council;
                Award ID: XHale 771883
                Award Recipient :
                Funded by: funder-id http://dx.doi.org/10.13039/501100007601, Horizon 2020;
                Award ID: No 871029
                Funded by: funder-id http://dx.doi.org/10.13039/100005156, Alexander von Humboldt-Stiftung;
                Award ID: Alexander von Humboldt Professorship
                Award Recipient :
                Funded by: funder-id http://dx.doi.org/10.13039/100011937, Niedersächsische Ministerium für Wissenschaft und Kultur;
                Award ID: 14 - 76103-184 CORONA-15/20
                Award Recipient :
                Funded by: federal ministry of education and research
                Award ID: 01KI20143C
                Award Recipient :
                Funded by: funder-id http://dx.doi.org/10.13039/100009139, Deutsches Zentrum für Infektionsforschung;
                Award ID: TTU 05.81600
                Award Recipient :
                Funded by: Fonds National de la Recherche Scientifique and WEBIO
                Award Recipient :
                Funded by: cariplo foundation
                Award ID: #2018-0498
                Award Recipient :
                This work was supported by: The German Research Foundation (DFG, HI 842/3-2 to D.H.-K.), by the DFG Clinical Research Group (DFG KFO311, HI 842/10-1, HI 842/10-2 to D.H.-K.; RI 2531/2-1, RI 2531/2-2 to M.R.-H.), by REBIRTH I/II to D.H.-K., by the Foundation Leducq (Project ID 19CVD02) to D.H.-K. and E.H., DFG as part of the German Strategy for Excellence (EXC 2155 “RESIST”, Project ID 39087428 to D.J.), The DEFEAT PANDEMIcs (AP6-9, to D.J. and M.P.K.), by the (DFG – Projektnummer 158989968 - SFB 900 project C7 and DFG project GE 2145/3-2 to G.G.), the ‘Niedersächsischen Vorab’ program (project 76251-99-3/19 to G.G.) through the Ministry of Lower Saxony (MWK) and the Volkswagen Foundation (Volkswagen Stiftung), by the Federal Ministry of education and research (project COVID-Protect, Project: 01KI20143C to G.G.), the Knut and Alice Wallenberg Foundation and the Federal Ministry of Education and Research together with the the Ministry for Science and Culture (MWG) through the ‘Professorinnen Programm III’ to G.G., by the European Research Council Consolidator Grant (XHale; 771883 to D.J.), by REBIRTH I/II and REBIRTH Center for Regenerative Translational Medicine (MWK, project ZN3440) to A.S., by Cariplo Foundation (Project #2018-0498 to E.H.), by MWG project 14-76103-184 CORONA-1/20 to T.I. and by the European Virus Archive GLOBAL (EVA-GLOBAL) project funded by the European Union’s Horizon 2020 research and innovation program under grant agreement No 871029 (to Christian Drosten). This work was partly supported by the Alexander von Humboldt Foundation in the framework of the Alexander von Humboldt Professorship endowed by the German Federal Ministry of Education and Research and by funding from the Ministry for Science and Culture (MWK), Lower Saxony, Germany (14 - 76103-184 CORONA-15/20 to G.F.R.). A.P.G. was supported by the Deutsches Zentrum für Infektionsforschung (DZIF; German Center for Infection Research; Grant No. TTU 05.816 00 to T.P.). Work by J.L.B. was supported by grants from Fonds National de la Recherche Scientifique (FNRS) and WEBIO. J.L.B is an established investigator of the WELBIO institute. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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