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Schrottmaier WC, Schmuckenschlager A, Thunberg T, Wigren-Byström J, Fors-Connolly AM, Assinger A, Ahlm C, Forsell MNE. Direct and indirect effects of Puumala hantavirus on platelet function. Thromb Res 2024; 233:41-54. [PMID: 38006765 DOI: 10.1016/j.thromres.2023.11.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/27/2023] [Accepted: 11/15/2023] [Indexed: 11/27/2023]
Abstract
Thrombocytopenia is a cardinal symptom of hantavirus-induced diseases including Puumala virus (PUUV)-induced hemorrhagic fever with renal syndrome (HFRS), which is associated with impaired platelet function, bleeding manifestations and augmented thrombotic risk. However, the underlying mechanisms causing thrombocytopenia and platelet hypo-responsiveness are unknown. Thus, we investigated the direct and indirect impact of PUUV on platelet production, function and degradation. Analysis of PUUV-HFRS patient blood revealed that platelet hypo-responsiveness in PUUV infection was cell-intrinsic and accompanied by reduced platelet-leukocyte aggregates (PLAs) and upregulation of monocyte tissue factor (TF), whereas platelet vasodilator-stimulated phosphoprotein (VASP) phosphorylation was comparable to healthy controls. Plasma CXCL4 levels followed platelet count dynamics throughout disease course. PUUV activated both neutrophils and monocytes in vitro, but platelet desialylation, degranulation and GPIIb/IIIa activation as well as PLA formation and endothelial adhesion under flow remained unaltered in the presence of PUUV. Further, MEG-01 megakaryocytes infected with PUUV displayed unaltered polyploidization, expression of surface receptors and platelet production. However, infection of endothelial cells with PUUV significantly increased platelet sequestration. Our data thus demonstrate that although platelet production, activation or degradation are not directly modulated, PUUV indirectly fosters thrombocytopenia by sequestration of platelets to infected endothelium. Upregulation of immunothrombotic processes in PUUV-HFRS may further contribute to platelet dysfunction and consumption. Given the pathophysiologic similarities of hantavirus infections, our findings thus provide important insights into the mechanisms underlying thrombocytopenia and highlight immune-mediated coagulopathy as potential therapeutic target.
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Affiliation(s)
- Waltraud C Schrottmaier
- Institute of Vascular Biology and Thrombosis Research, Center of Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria; Department of Clinical Microbiology, Umeå University, Umeå, Sweden.
| | - Anna Schmuckenschlager
- Institute of Vascular Biology and Thrombosis Research, Center of Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Therese Thunberg
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | | | | | - Alice Assinger
- Institute of Vascular Biology and Thrombosis Research, Center of Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Clas Ahlm
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
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Byström JW, Vikström L, Rosendal E, Gröning R, Gwon YD, Nilsson E, Sharma A, Espaillat A, Hanke L, McInerney G, Puhar A, Cava F, Karlsson Hedestam GB, Thunberg T, Monsen T, Elgh F, Evander M, Johansson AF, Överby AK, Ahlm C, Normark J, Forsell MN. At-home sampling to meet geographical challenges for serological assessment of SARS-CoV-2 exposure in a rural region of northern Sweden, March to May 2021: a retrospective cohort study. Euro Surveill 2023; 28. [PMID: 36995373 PMCID: PMC10064644 DOI: 10.2807/1560-7917.es.2023.28.13.2200432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023] Open
Abstract
BackgroundThe current SARS-CoV-2 pandemic has highlighted a need for easy and safe blood sampling in combination with accurate serological methodology. Venipuncture for testing is usually performed by trained staff at healthcare centres. Long travel distances to healthcare centres in rural regions may introduce a bias of testing towards relatively large communities with closer access. Rural regions are therefore often not represented in population-based data.AimThe aim of this retrospective cohort study was to develop and implement a strategy for at-home testing in a rural region of Sweden during spring 2021, and to evaluate its role to provide equal health care for its inhabitants.MethodsWe developed a sensitive method to measure antibodies to the S-protein of SARS-CoV-2 and optimised this assay for clinical use together with a strategy of at-home capillary blood sampling.ResultsWe demonstrated that our ELISA gave comparable results after analysis of capillary blood or serum from SARS-CoV-2-experienced individuals. We demonstrated stability of the assay under conditions that reflected temperature and humidity during winter or summer. By assessment of capillary blood samples from 4,122 individuals, we could show both feasibility of the strategy and that implementation shifted the geographical spread of testing in favour of rural areas.ConclusionImplementation of at-home sampling enabled citizens living in remote rural areas access to centralised and sensitive laboratory antibody tests. The strategy for testing used here could therefore enable disease control authorities to get rapid access to information concerning immunity to infectious diseases, even across vast geographical distance.
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Affiliation(s)
- Julia Wigren Byström
- Xerum AB, Umeå, Sweden
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Linnea Vikström
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Ebba Rosendal
- Laboratory for Molecular Infection Medicine Sweden, Umeå University, Umeå, Sweden
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Remigius Gröning
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Yong-Dae Gwon
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Emma Nilsson
- Laboratory for Molecular Infection Medicine Sweden, Umeå University, Umeå, Sweden
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Atin Sharma
- Department of Molecular Biology, Umeå University, Umeå, Sweden
- Laboratory for Molecular Infection Medicine Sweden, Umeå University, Umeå, Sweden
| | - Akbar Espaillat
- Department of Molecular Biology, Umeå University, Umeå, Sweden
- Laboratory for Molecular Infection Medicine Sweden, Umeå University, Umeå, Sweden
| | - Leo Hanke
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Gerald McInerney
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Andrea Puhar
- Department of Molecular Biology, Umeå University, Umeå, Sweden
- Laboratory for Molecular Infection Medicine Sweden, Umeå University, Umeå, Sweden
| | - Felipe Cava
- Department of Molecular Biology, Umeå University, Umeå, Sweden
- Laboratory for Molecular Infection Medicine Sweden, Umeå University, Umeå, Sweden
| | | | - Therese Thunberg
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Tor Monsen
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Fredrik Elgh
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Magnus Evander
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | | | - Anna K Överby
- Laboratory for Molecular Infection Medicine Sweden, Umeå University, Umeå, Sweden
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Clas Ahlm
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Johan Normark
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
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Tuiskunen Bäck A, Rasmuson J, Thunberg T, Rankin G, Wigren Byström J, Andersson C, Sjödin A, Forsell M, Ahlm C. Clinical and genomic characterisation of a fatal Puumala orthohantavirus case with low levels of neutralising antibodies. Infect Dis (Lond) 2022; 54:766-772. [PMID: 35713235 PMCID: PMC9908776 DOI: 10.1080/23744235.2022.2076904] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 04/11/2022] [Accepted: 05/07/2022] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Orthohantaviruses are rodent-borne emerging viruses that cause haemorrhagic fever with renal syndrome (HFRS) in Eurasia and hantavirus pulmonary syndrome in America. Transmission between humans have been reported and the case-fatality rate ranges from 0.4% to 40% depending on virus strain. There is no specific and efficient treatment for patients with severe HFRS. Here, we characterised a fatal case of HFRS and sequenced the causing Puumala orthohantavirus (PUUV). METHODS PUUV RNA and virus specific neutralising antibodies were quantified in plasma samples from the fatal case and other patients with non-fatal PUUV infection. To investigate if the causing PUUV strain was different from previously known strains, Sanger sequencing was performed directly from the patient's plasma. Biopsies obtained from autopsy were stained for immunohistochemistry. RESULTS The patient had approximately tenfold lower levels of PUUV neutralising antibodies and twice higher viral load than was normally seen for patients with less severe PUUV infection. We could demonstrate unique mutations in the S and M segments of the virus that could have had an impact on the severity of infection. Due to the severe course of infection, the patient was treated with the bradykinin receptor inhibitor icatibant to reduce bradykinin-mediated vessel permeability and maintain vascular circulation. CONCLUSIONS Our data suggest that bradykinin receptor inhibitor may not be highly efficient to treat patients that are at an advanced stage of HFRS. Low neutralising antibodies and high viral load at admission to the hospital were associated with the fatal outcome and may be useful for future predictions of disease outcome.
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Affiliation(s)
- Anne Tuiskunen Bäck
- Infection and Immunology, Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Johan Rasmuson
- Infection and Immunology, Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Therese Thunberg
- Infection and Immunology, Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Gregory Rankin
- Medicine and Pulmonary Medicine, Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| | - Julia Wigren Byström
- Infection and Immunology, Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | | | - Andreas Sjödin
- CBRN Security and Defence, Swedish Defence Research Agency - FOI, Umeå, Sweden
| | - Mattias Forsell
- Infection and Immunology, Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Clas Ahlm
- Infection and Immunology, Department of Clinical Microbiology, Umeå University, Umeå, Sweden
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Kerkman PF, Dernstedt A, Tadala L, Mittler E, Dannborg M, Sundling C, Maleki KT, Tauriainen J, Tuiskunen-Bäck A, Wigren Byström J, Ocaya P, Thunberg T, Jangra RK, Román-Sosa G, Guardado-Calvo P, Rey FA, Klingström J, Chandran K, Puhar A, Ahlm C, Forsell MN. Generation of plasma cells and CD27 -IgD - B cells during hantavirus infection is associated with distinct pathological findings. Clin Transl Immunology 2021; 10:e1313. [PMID: 34277007 PMCID: PMC8275445 DOI: 10.1002/cti2.1313] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 04/19/2021] [Accepted: 06/23/2021] [Indexed: 12/16/2022] Open
Abstract
Objective Human hantavirus infections can cause haemorrhagic fever with renal syndrome (HFRS). The pathogenic mechanisms are not fully understood, nor if they affect the humoral immune system. The objective of this study was to investigate humoral immune responses to hantavirus infection and to correlate them to the typical features of HFRS: thrombocytopenia and transient kidney dysfunction. Methods We performed a comprehensive characterisation of longitudinal antiviral B‐cell responses of 26 hantavirus patients and combined this with paired clinical data. In addition, we measured extracellular adenosine triphosphate (ATP) and its breakdown products in circulation and performed in vitro stimulations to address its effect on B cells. Results We found that thrombocytopenia was correlated to an elevated frequency of plasmablasts in circulation. In contrast, kidney dysfunction was indicative of an accumulation of CD27−IgD− B cells and CD27−/low plasmablasts. Finally, we provide evidence that high levels of extracellular ATP and matrix metalloproteinase 8 can contribute to shedding of CD27 during human hantavirus infection. Conclusion Our findings demonstrate that thrombocytopenia and kidney dysfunction associate with distinctly different effects on the humoral immune system. Moreover, hantavirus‐infected individuals have significantly elevated levels of extracellular ATP in circulation.
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Affiliation(s)
- Priscilla F Kerkman
- Department of Clinical Microbiology Umeå Centre for Microbial Research (UCMR) Umea Sweden
| | - Andy Dernstedt
- Department of Clinical Microbiology Umeå Centre for Microbial Research (UCMR) Umea Sweden
| | - Lalitha Tadala
- The Laboratory for Molecular Infection Medicine Sweden (MIMS) Umeå Centre for Microbial Research (UCMR) Umea Sweden.,Department of Molecular Biology Umeå University Umea Sweden
| | - Eva Mittler
- Department of Microbiology & Immunology Albert Einstein College of Medicine Bronx NY USA
| | - Mirjam Dannborg
- The Laboratory for Molecular Infection Medicine Sweden (MIMS) Umeå Centre for Microbial Research (UCMR) Umea Sweden.,Department of Molecular Biology Umeå University Umea Sweden
| | - Christopher Sundling
- Department of Medicine Karolinska Institutet Solna Sweden.,Department of Infectious Diseases Karolinska University Hospital Stockholm Sweden
| | - Kimia T Maleki
- Department of Medicine Karolinska Institutet Huddinge Sweden
| | | | - Anne Tuiskunen-Bäck
- Department of Clinical Microbiology Umeå Centre for Microbial Research (UCMR) Umea Sweden
| | - Julia Wigren Byström
- Department of Clinical Microbiology Umeå Centre for Microbial Research (UCMR) Umea Sweden
| | - Pauline Ocaya
- Department of Clinical Microbiology Umeå Centre for Microbial Research (UCMR) Umea Sweden
| | - Therese Thunberg
- Department of Clinical Microbiology Umeå Centre for Microbial Research (UCMR) Umea Sweden
| | - Rohit K Jangra
- Department of Microbiology & Immunology Albert Einstein College of Medicine Bronx NY USA
| | - Gleyder Román-Sosa
- Structural Virology Unit Virology Department Institut Pasteur CNRS UMR 3569 Paris France
| | - Pablo Guardado-Calvo
- Structural Virology Unit Virology Department Institut Pasteur CNRS UMR 3569 Paris France
| | - Felix A Rey
- Structural Virology Unit Virology Department Institut Pasteur CNRS UMR 3569 Paris France
| | | | - Kartik Chandran
- Department of Microbiology & Immunology Albert Einstein College of Medicine Bronx NY USA
| | - Andrea Puhar
- The Laboratory for Molecular Infection Medicine Sweden (MIMS) Umeå Centre for Microbial Research (UCMR) Umea Sweden.,Department of Molecular Biology Umeå University Umea Sweden
| | - Clas Ahlm
- Department of Clinical Microbiology Umeå Centre for Microbial Research (UCMR) Umea Sweden
| | - Mattias Ne Forsell
- Department of Clinical Microbiology Umeå Centre for Microbial Research (UCMR) Umea Sweden
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Schmedes CM, Grover SP, Hisada YM, Goeijenbier M, Hultdin J, Nilsson S, Thunberg T, Ahlm C, Mackman N, Fors Connolly AM. Circulating Extracellular Vesicle Tissue Factor Activity During Orthohantavirus Infection Is Associated With Intravascular Coagulation. J Infect Dis 2020; 222:1392-1399. [PMID: 31722433 PMCID: PMC7488197 DOI: 10.1093/infdis/jiz597] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 11/11/2019] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Puumala orthohantavirus (PUUV) causes hemorrhagic fever with renal syndrome (HFRS). Patients with HFRS have an activated coagulation system with increased risk of disseminated intravascular coagulation (DIC) and venous thromboembolism (VTE). The aim of the study was to determine whether circulating extracellular vesicle tissue factor (EVTF) activity levels associates with DIC and VTE (grouped as intravascular coagulation) in HFRS patients. METHODS Longitudinal samples were collected from 88 HFRS patients. Patients were stratified into groups of those with intravascular coagulation (n = 27) and those who did not (n = 61). We measured levels of circulating EVTF activity, fibrinogen, activated partial prothrombin time, D-dimer, tissue plasminogen activator (tPA), plasminogen activator inhibitor 1 (PAI-1), and platelets. RESULTS Plasma EVTF activity was transiently increased during HFRS. Levels of EVTF activity were significantly associated with plasma tPA and PAI-1, suggesting that endothelial cells could be a potential source. Patients with intravascular coagulation had significantly higher peak EVTF activity levels compared with those who did not, even after adjustment for sex and age. The peak EVTF activity value predicting intravascular coagulation was 0.51 ng/L with 63% sensitivity and 61% specificity with area under the curve = 0.63 (95% confidence interval, 0.51-0.76) and P = .046. CONCLUSIONS Plasma EVTF activity during HFRS is associated with intravascular coagulation.
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Affiliation(s)
- Clare M Schmedes
- Department of Medicine, Division of Hematology and Oncology, University of North Carolina at Chapel Hill, Chapel Hill, North Carlina, USA
| | - Steven P Grover
- Department of Medicine, Division of Hematology and Oncology, University of North Carolina at Chapel Hill, Chapel Hill, North Carlina, USA
| | - Yohei M Hisada
- Department of Medicine, Division of Hematology and Oncology, University of North Carolina at Chapel Hill, Chapel Hill, North Carlina, USA
| | - Marco Goeijenbier
- Department of Viroscience, Erasmus University Medical Center, Rotterdam, Netherlands
| | - Johan Hultdin
- Department of Medical Biosciences, Clinical Chemistry, Umeå University, Umeå, Sweden
| | - Sofie Nilsson
- Department of Medical Biosciences, Clinical Chemistry, Umeå University, Umeå, Sweden
| | - Therese Thunberg
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Clas Ahlm
- Department of Clinical Microbiology, Umeå University, Umeå, Sweden
| | - Nigel Mackman
- Department of Medicine, Division of Hematology and Oncology, University of North Carolina at Chapel Hill, Chapel Hill, North Carlina, USA
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Hansson M, Gustafsson R, Jacquet C, Chebaane N, Satchell S, Thunberg T, Ahlm C, Fors Connolly AM. Cystatin C and α-1-Microglobulin Predict Severe Acute Kidney Injury in Patients with Hemorrhagic Fever with Renal Syndrome. Pathogens 2020; 9:pathogens9080666. [PMID: 32824680 PMCID: PMC7460112 DOI: 10.3390/pathogens9080666] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/11/2020] [Accepted: 08/13/2020] [Indexed: 12/29/2022] Open
Abstract
Puumala orthohantavirus causes hemorrhagic fever with renal syndrome (HFRS) characterized by acute kidney injury (AKI), an abrupt decrease in renal function. Creatinine is routinely used to detect and quantify AKI; however, early AKI may not be reflected in increased creatinine levels. Therefore, kidney injury markers that can predict AKI are needed. The potential of the kidney injury markers urea, cystatin C, α1-microglobulin (A1M) and neutrophil gelatinase-associated lipocalin (NGAL) to detect early AKI during HFRS was studied by quantifying the levels of these markers in consecutively obtained plasma (P) and urine samples (U) for 44 HFRS patients. P-cystatin C and U-A1M levels were significantly increased during early HFRS compared to follow-up. In a receiver operating characteristic (ROC) curve analysis, P-cystatin C, U-A1M and P-urea predicted severe AKI with area under the curve 0.72, 0.73 and 0.71, respectively, whereas the traditional kidney injury biomarkers creatinine and U-albumin did not predict AKI. Nearly half of the HFRS patients (41%) fulfilled the criteria for shrunken pore syndrome, which was associated with the level of inflammation as measured by P-CRP. P-cystatin C and U-A1M are more sensitive and earlier markers compared to creatinine in predicting kidney injury during HFRS.
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Affiliation(s)
- Magnus Hansson
- Clinical Chemistry, Karolinska University Hospital, 17176 Stockholm, Sweden;
- Department of Laboratory Medicine, Karolinska Institutet, 17177 Stockholm, Sweden
| | - Rasmus Gustafsson
- Department of Clinical Neuroscience, Karolinska Institutet, 17177 Stockholm, Sweden;
| | - Chloé Jacquet
- Department of Clinical Microbiology, Umeå University, 90185 Umeå, Sweden; (C.J.); (N.C.); (T.T.); (C.A.)
- Molecular Infection Medicine Sweden (MIMS), Umeå University, 90187 Umeå, Sweden
| | - Nedia Chebaane
- Department of Clinical Microbiology, Umeå University, 90185 Umeå, Sweden; (C.J.); (N.C.); (T.T.); (C.A.)
| | - Simon Satchell
- Bristol Renal, Bristol Medical School, University of Bristol, Bristol BS1 3NY, UK;
| | - Therese Thunberg
- Department of Clinical Microbiology, Umeå University, 90185 Umeå, Sweden; (C.J.); (N.C.); (T.T.); (C.A.)
| | - Clas Ahlm
- Department of Clinical Microbiology, Umeå University, 90185 Umeå, Sweden; (C.J.); (N.C.); (T.T.); (C.A.)
| | - Anne-Marie Fors Connolly
- Department of Clinical Microbiology, Umeå University, 90185 Umeå, Sweden; (C.J.); (N.C.); (T.T.); (C.A.)
- Molecular Infection Medicine Sweden (MIMS), Umeå University, 90187 Umeå, Sweden
- Correspondence:
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Connolly-Andersen AM, Thunberg T, Ahlm C. Endothelial activation and repair during hantavirus infection: association with disease outcome. Open Forum Infect Dis 2014; 1:ofu027. [PMID: 25734100 PMCID: PMC4324194 DOI: 10.1093/ofid/ofu027] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2014] [Accepted: 04/22/2014] [Indexed: 01/06/2023] Open
Abstract
Background. Endothelial activation and dysfunction play a central role in the pathogenesis of sepsis and viral hemorrhagic fevers. Hantaviral disease is a viral hemorrhagic fever and is characterized by capillary dysfunction, although the underlying mechanisms for hantaviral disease are not fully elucidated. Methods. The temporal course of endothelial activation and repair were analyzed during Puumala hantavirus infection and associated with disease outcome and a marker for hypoxia, insulin-like growth factor binding protein 1 (IGFBP-1). The following endothelial activation markers were studied: endothelial glycocalyx degradation (syndecan-1) and leukocyte adhesion molecules (soluble vascular cellular adhesion molecule 1, intercellular adhesion molecule 1, and endothelial selectin). Cytokines associated with vascular repair were also analyzed (vascular endothelial growth factor, erythropoietin, angiopoietin, and stromal cell-derived factor 1). Results. Most of the markers we studied were highest during the earliest phase of hantaviral disease and associated with clinical and laboratory surrogate markers for disease outcome. In particular, the marker for glycocalyx degradation, syndecan-1, was significantly associated with levels of thrombocytes, albumin, IGFBP-1, decreased blood pressure, and disease severity. Conclusions. Hantaviral disease outcome was associated with endothelial dysfunction. Consequently, the endothelium warrants further investigation when designing future medical interventions.
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Affiliation(s)
| | - Therese Thunberg
- Division of Infectious Diseases, Department of Clinical Microbiology , Umeå University , Umeå , Sweden
| | - Clas Ahlm
- Division of Infectious Diseases, Department of Clinical Microbiology , Umeå University , Umeå , Sweden
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Pettersson L, Thunberg T, Rocklöv J, Klingström J, Evander M, Ahlm C. Viral load and humoral immune response in association with disease severity in Puumala hantavirus-infected patients--implications for treatment. Clin Microbiol Infect 2013; 20:235-41. [PMID: 23742660 PMCID: PMC4286007 DOI: 10.1111/1469-0691.12259] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Revised: 04/10/2013] [Accepted: 04/25/2013] [Indexed: 01/11/2023]
Abstract
Hantaviruses are the causative agents of haemorrhagic fever with renal syndrome (HFRS) in Eurasia and of hantavirus cardiopulmonary syndrome (HCPS) in the Americas. The case fatality rate varies between different hantaviruses and can be up to 40%. At present, there is no specific treatment available. The hantavirus pathogenesis is not well understood, but most likely, both virus-mediated and host-mediated mechanisms are involved. The aim of the present study was to investigate the association among Puumala hantavirus (PUUV) viral RNA load, humoral immune response and disease severity in patients with HFRS. We performed a study of 105 PUUV-infected patients that were followed during the acute phase of disease and for up to 1–3 months later. Fifteen of the 105 patients (14%) were classified as having moderate/severe disease. A low PUUV-specific IgG response (p <0.05) and also a higher white blood cell count (p <0.001) were significantly associated with more severe disease. The PUUV RNA was detected in a majority of patient plasma samples up to 9 days after disease onset; however, PUUV RNA load or longevity of viraemia were not significantly associated with disease severity. We conclude that a low specific IgG response was associated with disease severity in patients with HFRS, whereas PUUV RNA load did not seem to affect the severity of HFRS. Our results raise the possibility of passive immunotherapy as a useful treatment for hantavirus-infected patients.
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Affiliation(s)
- L Pettersson
- Department of Clinical Microbiology, Virology, Umeå University, Umeå, Sweden
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Thunberg T, Ahlborg UG, Wahlström B. Comparison between the effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin and six other compounds on the vitamin A storage, the UDP-glucuronosyltransferase and the aryl hydrocarbon hydroxylase activity in the rat liver. Arch Toxicol 1984; 55:16-9. [PMID: 6428382 DOI: 10.1007/bf00316580] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The effect of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), 2,3,7,8- tetrabromodibenzo -p-dioxin ( TBrDD ), 5-chloro-2-(2,4-dichlorophenoxy)phenol (3-Cl- predioxin ) 4,5,6-trichloro-2-(2,4-dichlorophenoxy)phenol (5-Cl- predioxin ), toxaphene, 3-methylcholanthrene (3-MC) and phenobarbital (PB) on the vitamin A storage, UDP-glucuronosyltransferase (UDPGT) and aryl hydrocarbon hydroxylase (AHH) activities in the liver of Sprague-Dawley rats was investigated. Vitamin A was determined as retinol by high pressure liquid chromatography. UDPGT was measured with p-nitrophenol as an aglycone and AHH with 3,4-benzopyrene as a substrate. Both in TCDD- and toxaphene-treated animals a reduced body weight gain was recorded, but no other overt signs of toxicity were seen in this study. Both the concentration and the total amount of hepatic retinol was significantly reduced in TCDD-, 3-MC-, PB- and TBrDD -treated animals. These compounds were also those which gave the most significant enzyme induction as regards the UDPGT and AHH activities. However, the reduction of hepatic retinol caused by these compounds did not correlate with the enzyme activities studied. When compared on a molecular basis, TCDD and TBrDD were in the order of several magnitudes more potent as reducers of hepatic retinol and likewise as enzyme inducers.
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Abstract
Vitamin A (retinol) status and the effect of a single oral dose of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), 10 micrograms X kg-1, on vitamin A in the liver and serum, and on the hepatic UDP-glucuronosyltransferase (UDPGT) (EC 2.4.1.17) activity, were studied in heterozygous (GW) and homozygous (GG) Gunn rats. 1) Data from vitamin A analyses demonstrate that the amount of vitamin A stored in the liver of untreated Gunn rats is of the same magnitude as that of Sprague-Dawley rats. 2) The retinol content in the liver of both GG and GW rats was reduced to about 50% by TCDD-treatment. 3) Retinol levels in serum were found to be variable and no significant effect due to TCDD could be observed. 4) No correlation between the TCDD-induced reduction of vitamin A and the induction of UDPGT activity by TCDD could be demonstrated in this study. The vitamin A reduction caused by TCDD was considerably less in the Gunn rat than in the Sprague-Dawley rat, and the results indicate that the Gunn rat is more resistant to TCDD than other strains of rat. TCDD-induced reduction of liver vitamin A seems to some extent to correlate with TCDD-toxicity in different strains of rat. The specific properties of the Gunn rat and its relatively high resistance to TCDD make it a valuable tool in studies about the mechanism of TCDD-toxicity.
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Thunberg T, Ahlborg UG, Håkansson H, Krantz C, Monier M. Effect of 2,3,7,8-tetrachlorodibenzo-p-dioxin on the hepatic storage of retinol in rats with different dietary supplies of vitamin A (retinol). Arch Toxicol 1980; 45:273-85. [PMID: 6778458 DOI: 10.1007/bf00293808] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The effect of various dietary sources of vitamin A on liver storage of retinol has been investigated in Sprague-Dawley rats treated with single oral doses of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD): 0,0.1,1.0, or 10 microgram.kg-1. Each dose group consisted of 3 subgroups, each comprising 10 rats which received a diet with normal, low or high retinol content. The animals were killed 4 weeks after TCDD administration. Analyses of retinol were performed by high pressure liquid chromatography and glucuronosyltransferase activities were determined spectrophotometrically. A dose-dependent decrease in hepatic storage of retinol was evident. The high retinol diet did not fully compensate for the reduction caused by the highest TCDD-dose. Glucuronosyltransferase activity increased directly in relation to the TCDD-dose but in inverse proportion to the retinol content of the diet.
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Thunberg T, Ahlborg UG, Johnsson H. Vitamin A (retinol) status in the rat after a single oral dose of 2,3,7,8-tetrachlorodibenzo-p-dioxin. Arch Toxicol 1979; 42:265-74. [PMID: 518291 DOI: 10.1007/bf00334840] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The effect of a single oral dose of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), 10 microgram . kg-1, on the status of vitamin A (retinol) was studied in rats during an eight week period after administration. Retinol was determined spectrophotometrically after separation by means of high pressure liquid chromatography. In the liver of control animals the total storage and the concentration of retinol were found to increase linearly with time whilst in the TCDD-exposed animals both the concentration and total storage remained essentially unchanged. Differences in the storage levels were evident after 4 days, and after 8 weeks the treated animals had a total liver storage corresponding to about 30% of the controls. Retinol levels in serum were significantly higher in the treated animals after week 1 and 2.
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Abstract
Pentachlorophenol has earlier been shown to be metabolized in mammals to tetrachloro-p-hydroquinone. The metabolite possesses pronounced inhibitory activity on bacterial beta-glucuronidase but not on beta-glucuronidase from liver. Indirect evidence for the occurrence of both pentachlorophenol and tetrachloro-p-hydroquinone as conjugates with glucuronic acid in the urine from pentachlorophenol-treated rats is now presented. Bovine liver beta-glucuronidase has been utlizied to split the conjugates present. The in vivo metabolism of pentachlorophenol has also been studied in rats treated with phenobarbital and beta-diethylaminoethylidiphenyl propylacetate (SKF 525-A). In vitro metabolism has been studied using liver microsomes from rats pretreated with pehnobarbital. Quantitative analysis of the compounds occurring in extracts of urine or extracts from the microsomal incubates was performed by means of mass fragmentography. Pretreatment with phenobarbital increased the metabolism of pentachlorophenol to tetrachloro-p-hydroquinone both in vivo and in vitro. SKF 525-A, however, inhibited the metabolism in vitro but enhanced the metabolism in vivo when given less frequently than every 6th h. Dechlorination of pentachlorophenol is mediated by microsomal enzymes that can be induced by phenobarbital. SKF 525-A does not inhibit the dechlorination in vivo but does so in vitro.
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Ahlborg UG, Thunberg T. Effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin on the in vivo and in vitro dechlorination of pentachlorophenol. Arch Toxicol 1978; 40:55-61. [PMID: 580376 DOI: 10.1007/bf00353279] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The metabolism of pentachlorophenol has been studied in the rat after pretreatments with phenobarbital, 3-methyl cholanthrene or 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). In addition to the previously identified metabolite, tetrachloro-p-hydroquinone, trichloro-p-hydroquinone has been identified in urine as a metabolite. The formation of the latter represents a type dechlorination different from that of the formation of tetrachlorohydroquinone. The inducing agents, 3-methylcholanthrene and TCDD have similar effects on the dechlorination and increase the formation of tetrachloro-p-hydroquinone more pronounced than does phenobarbital. In contrast to phenobarbital they also increase the formation of trichloro-p-hydroquinone and the total elimination of pentachlorophenol and its metabolites. The in vivo findings are supported by in vitro studies with microsomes from rats pretreated with phenobarbital or TCDD. Use of the inhibitor beta-diethylaminoethyl-diphenyl propylacetate (SKF 525-A) in vitro showed a more pronounced inhibition on microsomes from phenobarbital-treated rats than on microsomes from untreated or TCDD-treated rats. Gas chromatography-mass spectrometry have been used for the identification and quantification of pentachlorophenol and its metabolites.
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Abstract
An earlier study of the metabolism of pentachlorophenol has shown that a metabolite, tetrachloro-p-hydroquinone, possessed pronounced inhibitory action on the activity of beta-glucuronidase from bacterial origin. Several other chlorinated hydroquinones and benzoquinones have now been studied with regard to their ability to inhibit beta-glucuronidase of various origin in vitro and in vivo. All the studied chlorinated hydroquinones and benzoquinones were found to be potent inhibitors of beta-glucuronidase of bacterial origin. D-glucaric acid-1.4-lactone was included for comparison and was found to be less active than the other studied compounds. The inhibition was found to be competitive in nature. No inhibitory effect of the benzo- and hydroquinones studied in vitro or in vivo could be demonstrated on beta-glucuronidase from livers. The result calls for precaution when using bacterial beta-glucuronidase to split urinary conjugates of glucuronic acid.
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Bolander B, Thunberg T. [Report on professional group education activities]. Tidskr Sver Sjukskot 1967; 34:769-70. [PMID: 5189652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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