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Breuss A, Vonau N, Ungricht C, Schwarz E, Irion M, Bradicich M, Grewe FA, Liechti S, Thiel S, Kohler M, Riener R, Wilhelm E. Sleep Position Detection for Closed-Loop Treatment of Sleep-Related Breathing Disorders. IEEE Int Conf Rehabil Robot 2022; 2022:1-6. [PMID: 36176089 DOI: 10.1109/icorr55369.2022.9896559] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Reliable detection of sleep positions is essential for the development of technical aids for patients with position-dependent sleep-related breathing disorders. We compare personalized and generalizable sleeping position classifiers using unobtrusive eight-channel pressure-sensing mats. Data of six male patients with confirmed position-dependent sleep apnea was recorded during three subsequent nights. Personalized position classifiers trained using leave-one-night-out cross-validation on average reached an F1-score of 61.3% for supine/non-supine and an F1-score of 46.2% for supine/lateral-left/lateral-right classification. The generalizable classifiers reached average F1-scores of 62.1% and 49.1% for supine/non-supine and supine/lateral-left/lateral-right classification, respectively. In-bed presence ("bed occupancy") could be detected with an average F1-score of 98.1%. This work shows that personalized sleep-position classifiers trained with data from two nights have comparable performance to classifiers trained with large interpatient datasets. Simple eight-channel sensor mattresses can be used to accurately detect in-bed presence required for closed-loop systems but their use to classify sleep-positions is limited.
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Larsen MCL, Troldborg A, Toonen E, Hurler L, Prohászka Z, Cervenak L, Hansen AG, Thiel S. POS0060 MEASUREMENTS OF COMPLEMENT ACTIVITY SPECIFICALLY THOUGH THE LECTIN -OR THE CLASSICAL PATHWAY IN PATIENTS WITH SLE. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.2482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BackgroundIn systemic lupus erythematosus (SLE), the complement system (CS) is activated and thought to occur primarily through the classical pathway (CP) [1]. Traditionally, when diagnosing SLE or assessing disease activity, measurement of low C3 or C4 are used as proxies for complement activation [2]. However, measurement of C3 and C4 does not differentiate which complement pathway initiated the activation (i.e., the lectin pathway (LP), the CP, or the alternative pathway) [1, 3].C1-esterase inhibitor (C1inh) is one of the key regulators of the CS. C1inh is the exclusive inhibitor of the active CP enzymes C1r and C1s [4], and the major inhibitor of active LP enzymes MASP-1 and MASP-2 [5]. A possible way of assessing complement activation through a specific pathway, is by measuring activated enzymes complexed with C1inh in plasma, as these complexes only exist after complement enzyme activation.ObjectivesOur aim was to investigate and unravel LP and CP complement activation in SLE, by measuring the protein complexes MASP1/C1inh (LP specific activation) and C1r/C1inh (CP specific activation). Furthermore, we aimed to investigate whether there is an association between complement activity, disease activity (SLEDAI) and disease manifestations (lupus nephritis (LN)).MethodsA cross sectional cohort of 150 patients with SLE fulfilling the 1997 ACR classification criteria for SLE were included from the out-patient clinic at the department of Rheumatology, Aarhus University Hospital (AUH), Denmark. Disease manifestations and disease activity using SLEDAI score was assessed at inclusion. Fifty healthy individuals included at the Blood Bank, AUH, were used as controls. Both C1s/C1inh and MASP1/C1inh complexes were measured in all samples using two newly developed sandwich ELISAs (C1s/C1inh: cat# HK399; MASP1/C1inh: Cat#3001, Hycult Biotech, Uden, The Netherlands). EDTA-samples from both SLE patients and controls were measured in duplicates.ResultsWhen comparing SLE patients to controls, we observed a difference in complement activation through the LP, where a lower mean MASP1/C1inh plasma concentration was observed (p<0.01).C1s/C1inh concentrations were significantly increased in active SLE patients (SLEDAI >6) when compared to SLE patients with low disease activity (SLEDAI <6, p<0.01) and correlated with SLEDAI score (r=0.285, p<0.01). C1s/C1inh concentrations were increased in SLE patients with active LN compared to non-active LN, however this not statistically significant (p=0.09).No differences in MASP1/C1inh plasma concentrations were observed between active SLE patients and patients with low disease activity (p=0.11), nor did we observe a significant correlation with disease activity (r=0.12, p=0.13). In active LN, plasma concentrations of MASP1/C1inh were significantly elevated compared to non-active LN (p=0.02).ConclusionOur data suggest that the CP and the LP is activated in SLE. CS is generally activated in active SLE disease, whereas activation of the LP might be more specific to particular disease manifestations like LN.Our findings warrant further research into activation of the specific complement pathways in relation to specific disease manifestations in SLE.References[1]Troldborg, A., et al., J Rheumatol, 2018.[2]Weinstein, A., et al., Curr Rheumatol Rep, 2021.[3]Atkinson, J.P., Clin Exp Rheumatol, 1989.[4]Sim, R.B., et al., FEBS Lett, 1979.[5]Paréj, K., et al., Mol Immunol, 2013.Figure 1.Measurements of plasma concentrations of C1r in complex with C1-inhibitor (C1r/C1inh) (a1-a4) and MASP1 in complex with C1-inhibitor (MASP1/C1inh) (b1-b4) in Systemic Lupus Erythematosus (SLE) patients and controls. A1 and b1 show measurements of SLE patients versus controls. A2 and b2 show measurements in SLE patients with active disease (SLEDAI >6) versus low disease activity (SLEDAI<6). A3 and b3 show correlation analysis between measurements and SLEDAI score in SLE patients. A4 and b4 show measurements in SLE patients with active lupus nephritis (LN) versus non-active LN.Disclosure of InterestsMads Christian Lamm Larsen: None declared, Anne Troldborg: None declared, Erik Toonen Employee of: ET is an employee of Hycult Biotech, Lisa Hurler: None declared, Zoltán Prohászka: None declared, László Cervenak: None declared, Annette G Hansen: None declared, Steffen Thiel: None declared
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Jørgensen CM, Troldborg A, Hansen AG, Thiel S, Jurik AG, Kiil RM, Christiansen AA, Schiøttz-Christensen B, Hendricks O, Loft AG. POS0059 COMPLEMENT PROTEINS ARE ELEVATED IN PATIENTS WITH axSpA COMPARED WITH RELEVANT CONTROLS OF PATIENTS WITH LOW BACK PAIN AND SpA-FEATURES WITHOUT AXSPA. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.3846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundAxial spondyloarthritis (axSpA) is associated with a certain genetic predisposition, i.e., with the presence of human leukocyte antigen (HLA)-B27. However, the pathogenesis remains largely unexplained. Animal models of ankylosing spondylitis have shown inhibition of complement to be beneficial in terms of limiting structural damage (1). The lectin pathway of complement activation serves as a key component of the innate immune system and plays a pivotal role in both homeostasis and development. The influence of complement in axSpA is mainly unexplored. We have, however, previously reported elevated plasma levels of the lectin pathway proteins L-ficolin and H-ficolin in patients with axSpA compared with blood donors (2).ObjectivesOur aim was to investigate plasma levels of lectin pathway proteins in a clinical cohort of patients with axSpA and compare them to relevant controls that we often experience significant challenges in differentiating from axSpA.MethodsPlasma samples were obtained from individuals in a cohort of patients suffering from low back pain (LBP) including: 1) 23 patients with axSpA, 2) 55 patients without axSpA experiencing SpA-features/symptoms, and 3) 64 patients with nonspecific LBP without SpA-features or MRI findings suggestive of axSpA. Diagnosis of axSpA was based on multidisciplinary team conference consensus after 3.5 years of follow-up (3). Plasma levels of 10 lectin pathway proteins (MBL, CL-L1, H-ficolin, L-ficolin, M-ficolin, MASP-1, MASP-2, MASP-3, MAp44, and MAp19) were measured by immunoassays developed in-house.ResultsPatient characteristics are shown in Table 1. Plasma levels of lectin pathway proteins L-ficolin, M-ficolin and CL-L1 differed significantly in the patient groups (p ≤ 0.03). L-ficolin and M-ficolin were elevated in axSpA-patients compared with patients with SpA-features without axSpA and nonspecific LBP patients (Figure 1). CL-L1 was elevated in axSpA-patients and patients with SpA-features without axSpA compared with nonspecific LBP patients (Figure 1). No significant differences were observed for MBL, H-ficolin, MASP-1, MASP-2, MASP-3, MAp44, and MAp19. L-ficolin levels correlated with CRP in axSpA-patients (Spearman’s rho=0.58 p=0.004). M-ficolin levels correlated weakly with CRP in nonspecific LBP patients (Spearman’s rho=0.36 p=0.003). Lectin pathway protein levels did not correlate with disease activity (ASDAS).Table 1.Patient characteristicsaxSpA (n=23)Not axSpA (n=55)Non-specific low back pain (n=64)p-valueMedian age, years (range)32 (19-40)33 (19-41)32 (18-39)0.75aMales, n (%)10 (43)37 (67)26 (41)0.01bHLA-B27 positive, n (%)17 (74)11 (20)5 (8)0.00bInflammatory back pain, n (%)18 (78)28 (51)0.03cGood response to NSAID14 (61)17 (31)0.01cSacroiliitiis on MRI acc. ASAS, n (%)22 (96)45 (82)0.11cElevated CRP, n (%)3 (13)7 (13)0.97ASDAS (range)2.5 (1.2-3.7)2.3 (0.8-3.8)0.52da compared by Kruskal-Wallis test.b all three groups compared by Chi2 test.c compared by Chi2 test.d compared by Mann Whitney U test.Figure 1.Plasma levels of L-ficolin, M-ficolin and CL-L1.ConclusionL-ficolin and M-ficolin are increased in patients with axSpA when compared with relevant control cohorts of patients with LBP or with SpA-features without axSpA. Our findings support a potential pathogenic role for complement in axSpA, however, further studies are needed to elucidate the diagnostic potential of the specific complement proteins.References[1]Yang, C. et al. Inhibition of complement retards ankylosing spondylitis progression. Sci. Rep. (2016) doi:10.1038/srep34643.[2]Troldborg, A. et al. Plasma levels of H- and L-ficolin are increased in axial spondyloarthritis: improvement of disease identification. Clin. Exp. Immunol. (2020) doi:10.1111/cei.13374.[3]Kiil, R. M. et al. Diagnosing axSpA by multidiciplinary team conference at 3.5 years’ follow-up in a cohort of patients with disease features according to the ASAS criteria. Scand. J. Rheumatol. (2021) doi:10.1080/03009742.2021.1933584.Disclosure of InterestsNone declared
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Hasan Ali O, Bomze D, Risch L, Brugger SD, Paprotny M, Weber M, Thiel S, Kern L, Albrich WC, Kohler P, Kahlert CR, Vernazza P, Bühler PK, Schüpbach RA, Gómez-Mejia A, Popa AM, Bergthaler A, Penninger JM, Flatz L. Erratum to: Severe Coronavirus Disease 2019 (COVID-19) is Associated With Elevated Serum Immunoglobulin (Ig) A and Antiphospholipid IgA Antibodies. Clin Infect Dis 2021; 73:1746. [PMID: 34550333 PMCID: PMC8787408 DOI: 10.1093/cid/ciab532] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Omar Hasan Ali
- Department of Medical Genetics, Life Sciences Institute, University of British Columbia, Vancouver, Canada
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - David Bomze
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Lorenz Risch
- Labormedizinisches Zentrum Dr. Risch, Vaduz, Liechtenstein
- Center of Laboratory Medicine, University Institute of Clinical Chemistry, University of Bern, Bern, Switzerland
| | - Silvio D Brugger
- Department of Infectious Diseases and Hospital Hygiene, University Hospital Zurich, Zurich, Switzerland
| | - Matthias Paprotny
- Department of General Internal Medicine, Landesspital Liechtenstein, Vaduz, Liechtenstein
| | - Myriam Weber
- Department of General Internal Medicine, Landesspital Liechtenstein, Vaduz, Liechtenstein
| | - Sarah Thiel
- Department of General Internal Medicine, Landesspital Liechtenstein, Vaduz, Liechtenstein
| | - Lukas Kern
- Department of Pulmonology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Werner C Albrich
- Division of Infectious Diseases and Hospital Epidemiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Philipp Kohler
- Division of Infectious Diseases and Hospital Epidemiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Christian R Kahlert
- Division of Infectious Diseases and Hospital Epidemiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
- Department of Infectious Diseases and Hospital Epidemiology, Children’s Hospital of Eastern Switzerland, St. Gallen, Switzerland
| | - Pietro Vernazza
- Division of Infectious Diseases and Hospital Epidemiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Philipp K Bühler
- Institute of Intensive Care Medicine, University Hospital Zurich, Zurich, Switzerland
| | - Reto A Schüpbach
- Institute of Intensive Care Medicine, University Hospital Zurich, Zurich, Switzerland
| | - Alejandro Gómez-Mejia
- Department of Infectious Diseases and Hospital Hygiene, University Hospital Zurich, Zurich, Switzerland
| | - Alexandra M Popa
- Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Andreas Bergthaler
- Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Josef M Penninger
- Department of Medical Genetics, Life Sciences Institute, University of British Columbia, Vancouver, Canada
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna, Austria
| | - Lukas Flatz
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
- Department of Dermatology, Kantonsspital St. Gallen, St. Gallen, Switzerland
- Department of Oncology and Hematology, Kantonsspital St. Gallen, St. Gallen, Switzerland
- Correspondence: L. Flatz, Kantonsspital St. Gallen, Institute of Immunobiology, Rorschacher Strasse 95, 9007 St. Gallen, Switzerland ()
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Risch M, Weber M, Thiel S, Grossmann K, Wohlwend N, Lung T, Hillmann D, Ritzler M, Ferrara F, Bigler S, Egli K, Bodmer T, Imperiali M, Salimi Y, Fleisch F, Cusini A, Renz H, Kohler P, Vernazza P, Kahlert CR, Paprotny M, Risch L. Temporal Course of SARS-CoV-2 Antibody Positivity in Patients with COVID-19 following the First Clinical Presentation. Biomed Res Int 2020; 2020:9878453. [PMID: 33224987 PMCID: PMC7673235 DOI: 10.1155/2020/9878453] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 10/13/2020] [Accepted: 10/22/2020] [Indexed: 11/18/2022]
Abstract
Knowledge of the sensitivities of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antibody tests beyond 35 days after the clinical onset of COVID-19 is insufficient. We aimed to describe positivity rate of SARS-CoV-2 assays employing three different measurement principles over a prolonged period. Two hundred sixty-eight samples from 180 symptomatic patients with COVID-19 and a reverse transcription polymerase chain reaction (RT-PCR) test followed by serological investigation of SARS-CoV-2 antibodies were included. We conducted three chemiluminescence (including electrochemiluminescence assay (ECLIA)), four enzyme-linked immunosorbent assay (ELISA), and one lateral flow immunoassay (LFIA) test formats. Positivity rates, as well as positive (PPVs) and negative predictive values (NPVs), were calculated for each week after the first clinical presentation for COVID-19. Furthermore, combinations of tests were assessed within an orthogonal testing approach employing two independent assays and predictive values were calculated. Heat maps were constructed to graphically illustrate operational test characteristics. During a follow-up period of more than 9 weeks, chemiluminescence assays and one ELISA IgG test showed stable positivity rates after the third week. With the exception of ECLIA, the PPVs of the other chemiluminescence assays were ≥95% for COVID-19 only after the second week. ELISA and LFIA had somewhat lower PPVs. IgM exhibited insufficient predictive characteristics. An orthogonal testing approach provided PPVs ≥ 95% for patients with a moderate pretest probability (e.g., symptomatic patients), even for tests with a low single test performance. After the second week, NPVs of all but IgM assays were ≥95% for patients with low to moderate pretest probability. The confirmation of negative results using an orthogonal algorithm with another assay provided lower NPVs than the single assays. When interpreting results from SARS-CoV-2 tests, the pretest probability, time of blood draw, and assay characteristics must be carefully considered. An orthogonal testing approach increases the accuracy of positive, but not negative, predictions.
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Affiliation(s)
- Martin Risch
- Zentrallabor, Kantonsspital Graubünden, Loësstrasse 170, 7000 Chur, Switzerland
| | - Myriam Weber
- Liechtensteinisches Landesspital, Heiligkreuz, 9490 Vaduz, Liechtenstein
| | - Sarah Thiel
- Liechtensteinisches Landesspital, Heiligkreuz, 9490 Vaduz, Liechtenstein
| | - Kirsten Grossmann
- Labormedizinisches Zentrum Dr. Risch, Wuhrstrasse 14, 9490 Vaduz, Liechtenstein
- Private Universität im Fürstentum Liechtenstein, Dorfstrasse, 9495 Triesen, Liechtenstein
| | - Nadia Wohlwend
- Labormedizinisches Zentrum Dr. Risch, Wuhrstrasse 14, 9490 Vaduz, Liechtenstein
| | - Thomas Lung
- Labormedizinisches Zentrum Dr. Risch, Wuhrstrasse 14, 9490 Vaduz, Liechtenstein
| | - Dorothea Hillmann
- Labormedizinisches Zentrum Dr. Risch, Wuhrstrasse 14, 9490 Vaduz, Liechtenstein
| | - Michael Ritzler
- Labormedizinisches Zentrum Dr. Risch, Wuhrstrasse 14, 9490 Vaduz, Liechtenstein
| | - Francesca Ferrara
- Labormedizinisches Zentrum Dr. Risch, Wuhrstrasse 14, 9490 Vaduz, Liechtenstein
| | - Susanna Bigler
- Labormedizinisches Zentrum Dr. Risch, Waldeggstrasse 37, 3097 Liebefeld, Switzerland
| | - Konrad Egli
- Labormedizinisches Zentrum Dr. Risch, Waldeggstrasse 37, 3097 Liebefeld, Switzerland
| | - Thomas Bodmer
- Labormedizinisches Zentrum Dr. Risch, Waldeggstrasse 37, 3097 Liebefeld, Switzerland
| | - Mauro Imperiali
- Centro Medicina di Laboratorio Dr. Risch, Via Arbostra 2, 6963 Pregassona, Switzerland
| | - Yacir Salimi
- Clm Dr. Risch Arc Lémanique SA, Chemin de l'Esparcette 10, 1023 Crissier, Switzerland
| | - Felix Fleisch
- Division of Infectious Diseases, Cantonal Hospital Chur, Loësstrasse 170, 7000 Chur, Switzerland
| | - Alexia Cusini
- Division of Infectious Diseases, Cantonal Hospital Chur, Loësstrasse 170, 7000 Chur, Switzerland
| | - Harald Renz
- Institute of Laboratory Medicine and Pathobiochemistry, Molecular Diagnostics, Philipps University Marburg, University Hospital Giessen and Marburg, Baldingerstraße, 35043 Marburg, Germany
| | - Philipp Kohler
- Cantonal Hospital St. Gallen, Department of Infectious Diseases and Hospital Epidemiology, Rohrschacherstrasse 95, 9007 St. Gallen, Switzerland
| | - Pietro Vernazza
- Cantonal Hospital St. Gallen, Department of Infectious Diseases and Hospital Epidemiology, Rohrschacherstrasse 95, 9007 St. Gallen, Switzerland
| | - Christian R. Kahlert
- Cantonal Hospital St. Gallen, Department of Infectious Diseases and Hospital Epidemiology, Rohrschacherstrasse 95, 9007 St. Gallen, Switzerland
- Children's Hospital of Eastern Switzerland, Department of Infectious Diseases and Hospital Epidemiology, Claudiusstrasse 6, 9006 St. Gallen, Switzerland
| | - Matthias Paprotny
- Liechtensteinisches Landesspital, Heiligkreuz, 9490 Vaduz, Liechtenstein
| | - Lorenz Risch
- Labormedizinisches Zentrum Dr. Risch, Wuhrstrasse 14, 9490 Vaduz, Liechtenstein
- Private Universität im Fürstentum Liechtenstein, Dorfstrasse, 9495 Triesen, Liechtenstein
- Center of Laboratory Medicine, University Institute of Clinical Chemistry, University of Bern, Inselspital, 3010 Bern, Switzerland
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Hasan Ali O, Bomze D, Risch L, Brugger SD, Paprotny M, Weber M, Thiel S, Kern L, Albrich WC, Kohler P, Kahlert CR, Vernazza P, Bühler PK, Schüpbach RA, Gómez-Mejia A, Popa AM, Bergthaler A, Penninger JM, Flatz L. Severe COVID-19 is associated with elevated serum IgA and antiphospholipid IgA-antibodies. Clin Infect Dis 2020; 73:e2869-e2874. [PMID: 32997739 PMCID: PMC7543315 DOI: 10.1093/cid/ciaa1496] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 09/29/2020] [Indexed: 01/15/2023] Open
Abstract
Background Severe coronavirus disease 2019 (COVID-19) frequently entails complications that bear similarities to autoimmune diseases. To date, there is little data on possible IgA-mediated autoimmune responses. Here, we aim to determine whether COVID-19 is associated with a vigorous total IgA response and if IgA antibodies are associated with complications of severe illness. Since thrombotic events are frequent in severe COVID-19 and resemble hypercoagulation of antiphospholipid syndrome (APS), our approach focused on antiphospholipid antibodies (aPL). Methods In this retrospective cohort study clinical data and aPL from 64 patients with COVID-19 were compared from three independent tertiary hospitals (one in Liechtenstein, two in Switzerland). Samples were collected from April 9 th to May 1 st, 2020. Results Clinical records of 64 patients with COVID-19 were reviewed and divided into a cohort with mild illness (mCOVID) (41%), a discovery cohort with severe illness (sdCOVID) (22%) and a confirmation cohort with severe illness (scCOVID) (38%). Total IgA, IgG and aPL were measured with clinical diagnostic kits. Severe illness was significantly associated with increased total IgA (sdCOVID, P=0.01; scCOVID, p-value<0.001), but not total IgG. Among aPL, both cohorts with severe illness significantly correlated with elevated anti-Cardiolipin IgA (sdCOVID and scCOVID, p-value<0.001), anti-Cardiolipin IgM (sdCOVID, P=0.003; scCOVID, P<0.001), and anti-Beta2 Glycoprotein-1 IgA (sdCOVID and scCOVID, P<0.001). Systemic lupus erythematosus was excluded from all patients as a potential confounder. Conclusions Higher total IgA and IgA-aPL were consistently associated with severe illness. These novel data strongly suggest that a vigorous antiviral IgA-response, possibly triggered in the bronchial mucosa, induces systemic autoimmunity.
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Affiliation(s)
- Omar Hasan Ali
- Department of Medical Genetics, Life Sciences Institute, University of British Columbia, Vancouver, Canada.,Department of Dermatology, University Hospital Zurich, Zurich, Switzerland.,Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - David Bomze
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Lorenz Risch
- Labormedizinisches Zentrum Dr. Risch, Vaduz, Liechtenstein.,Center of Laboratory Medicine, University Institute of Clinical Chemistry, University of Bern, Bern, Switzerland
| | - Silvio D Brugger
- Department of Infectious Diseases and Hospital Hygiene, University Hospital Zurich, Zurich, Switzerland
| | - Matthias Paprotny
- Department of General Internal Medicine, Landesspital Liechtenstein, Vaduz, Liechtenstein
| | - Myriam Weber
- Department of General Internal Medicine, Landesspital Liechtenstein, Vaduz, Liechtenstein
| | - Sarah Thiel
- Department of General Internal Medicine, Landesspital Liechtenstein, Vaduz, Liechtenstein
| | - Lukas Kern
- Department of Pulmonology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Werner C Albrich
- Division of Infectious Diseases and Hospital Epidemiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Philipp Kohler
- Division of Infectious Diseases and Hospital Epidemiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Christian R Kahlert
- Division of Infectious Diseases and Hospital Epidemiology, Kantonsspital St. Gallen, St. Gallen, Switzerland.,Department of Infectious Diseases and Hospital Epidemiology, Children's Hospital of Eastern Switzerland, St. Gallen, Switzerland
| | - Pietro Vernazza
- Division of Infectious Diseases and Hospital Epidemiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Philipp K Bühler
- Institute of Intensive Care Medicine, University Hospital Zurich, Zurich, Switzerland
| | - Reto A Schüpbach
- Institute of Intensive Care Medicine, University Hospital Zurich, Zurich, Switzerland
| | - Alejandro Gómez-Mejia
- Department of Infectious Diseases and Hospital Hygiene, University Hospital Zurich, Zurich, Switzerland
| | - Alexandra M Popa
- Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Andreas Bergthaler
- Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Josef M Penninger
- Department of Medical Genetics, Life Sciences Institute, University of British Columbia, Vancouver, Canada.,IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna, Austria
| | - Lukas Flatz
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland.,Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland.,Department of Dermatology, Kantonsspital St. Gallen, St. Gallen, Switzerland.,Department of Oncology and Hematology, Kantonsspital St. Gallen, St. Gallen, Switzerland
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Baron RC, Risch L, Weber M, Thiel S, Grossmann K, Wohlwend N, Lung T, Hillmann D, Ritzler M, Bigler S, Egli K, Ferrara F, Bodmer T, Imperiali M, Heer S, Renz H, Flatz L, Kohler P, Vernazza P, Kahlert CR, Paprotny M, Risch M. Frequency of serological non-responders and false-negative RT-PCR results in SARS-CoV-2 testing: a population-based study. Clin Chem Lab Med 2020; 58:2131-2140. [PMID: 32866113 DOI: 10.1515/cclm-2020-0978] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 08/12/2020] [Indexed: 12/17/2022]
Abstract
Objectives The sensitivity of molecular and serological methods for COVID-19 testing in an epidemiological setting is not well described. The aim of the study was to determine the frequency of negative RT-PCR results at first clinical presentation as well as negative serological results after a follow-up of at least 3 weeks. Methods Among all patients seen for suspected COVID-19 in Liechtenstein (n=1921), we included initially RT-PCR positive index patients (n=85) as well as initially RT-PCR negative (n=66) for follow-up with SARS-CoV-2 antibody testing. Antibodies were detected with seven different commercially available immunoassays. Frequencies of negative RT-PCR and serology results in individuals with COVID-19 were determined and compared to those observed in a validation cohort of Swiss patients (n=211). Results Among COVID-19 patients in Liechtenstein, false-negative RT-PCR at initial presentation was seen in 18% (12/66), whereas negative serology in COVID-19 patients was 4% (3/85). The validation cohort showed similar frequencies: 2/66 (3%) for negative serology, and 16/155 (10%) for false negative RT-PCR. COVID-19 patients with negative follow-up serology tended to have a longer disease duration (p=0.05) and more clinical symptoms than other patients with COVID-19 (p<0.05). The antibody titer from quantitative immunoassays was positively associated with the number of disease symptoms and disease duration (p<0.001). Conclusions RT-PCR at initial presentation in patients with suspected COVID-19 can miss infected patients. Antibody titers of SARS-CoV-2 assays are linked to the number of disease symptoms and the duration of disease. One in 25 patients with RT-PCR-positive COVID-19 does not develop antibodies detectable with frequently employed and commercially available immunoassays.
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Affiliation(s)
| | - Lorenz Risch
- Labormedizinisches zentrum Dr. Risch, Buchs, Switzerland.,Private Universität im Fürstentum Liechtenstein, Triesen, Liechtenstein.,Center of Laboratory Medicine, University Institute of Clinical Chemistry, University of Bern, Bern, Switzerland
| | - Myriam Weber
- Liechtensteinisches Landesspital, Heiligkreuz, Vaduz, Liechtenstein
| | - Sarah Thiel
- Liechtensteinisches Landesspital, Heiligkreuz, Vaduz, Liechtenstein
| | - Kirsten Grossmann
- Private Universität im Fürstentum Liechtenstein, Triesen, Liechtenstein
| | - Nadia Wohlwend
- Labormedizinisches zentrum Dr. Risch, Buchs, Switzerland
| | - Thomas Lung
- Labormedizinisches zentrum Dr. Risch, Buchs, Switzerland
| | | | | | - Susanna Bigler
- Labormedizinisches zentrum Dr. Risch, Liebefeld, Switzerland
| | - Konrad Egli
- Labormedizinisches zentrum Dr. Risch, Liebefeld, Switzerland
| | | | - Thomas Bodmer
- Labormedizinisches zentrum Dr. Risch, Liebefeld, Switzerland
| | - Mauro Imperiali
- Centro medicina di laboratorio Dr. Risch, Pregassona, Switzerland
| | - Sonja Heer
- Blutspendedienst Graubünden, Chur, Switzerland
| | - Harald Renz
- Institute of Laboratory Medicine and Pathobiochemistry, Molecular Diagnostics, Philipps University Marburg, Marburg, Germany.,University Hospital Giessen and Marburg, Marburg, Germany
| | - Lukas Flatz
- Institute of Immunobiology, Kantonsspital St Gallen, St Gallen, Switzerland
| | - Philipp Kohler
- Cantonal Hospital St Gallen, Department of Infectious Diseases and Hospital Epidemiology, St Gallen, Switzerland
| | - Pietro Vernazza
- Cantonal Hospital St Gallen, Department of Infectious Diseases and Hospital Epidemiology, St Gallen, Switzerland
| | - Christian R Kahlert
- Cantonal Hospital St Gallen, Department of Infectious Diseases and Hospital Epidemiology, St Gallen, Switzerland.,Children's Hospital of Eastern Switzerland, Departments of Infectious Diseases and Hospital Epidemiology, St Gallen, Switzerland
| | | | - Martin Risch
- Zentrallabor, Kantonsspital Graubünden, Chur, Switzerland
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8
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Holt CB, Hoffmann-Petersen IT, Hansen TK, Parving HH, Thiel S, Hovind P, Tarnow L, Rossing P, Østergaard JA. Association between severe diabetic retinopathy and lectin pathway proteins - an 18-year follow-up study with newly diagnosed type 1 diabetes patients. Immunobiology 2020; 225:151939. [PMID: 32381273 DOI: 10.1016/j.imbio.2020.151939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 03/25/2020] [Accepted: 03/25/2020] [Indexed: 11/18/2022]
Affiliation(s)
- C B Holt
- Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus, Denmark; Aarhus University, Aarhus, Denmark.
| | | | - T K Hansen
- Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus, Denmark
| | - H-H Parving
- Department of Medical Endocrinology, Rigshospitalet, Copenhagen, Denmark
| | - S Thiel
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - P Hovind
- Steno Diabetes Center Copenhagen, Gentofte, Denmark
| | - L Tarnow
- Steno Diabetes Center, Sjaelland, Denmark
| | - P Rossing
- Steno Diabetes Center Copenhagen, Gentofte, Denmark; University of Copenhagen, Copenhagen, Denmark
| | - J A Østergaard
- Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus, Denmark; Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
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9
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Troldborg A, Thiel S, Mistegaard CE, Hansen A, Korsholm T, Stengaard‐Pedersen K, Loft AG. Plasma levels of H- and L-ficolin are increased in axial spondyloarthritis: improvement of disease identification. Clin Exp Immunol 2020; 199:79-87. [PMID: 31518441 PMCID: PMC6904737 DOI: 10.1111/cei.13374] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/08/2019] [Indexed: 12/15/2022] Open
Abstract
Axial spondyloarthritis (axSpA) is a chronic inflammatory disease that primarily affects the axial skeleton. A predominance of innate versus adaptive immune responses have been reported in axSpA, indicating a prominent autoinflammatory component of the disease. Little is known about the lectin pathway proteins (LPPs) of the complement system in relation to axSpA. We have investigated LPPs in patients with axSpA and control individuals. Plasma samples were obtained from a cross-sectional cohort of 120 patients with a clinical diagnosis of axSpA and from 144 age- and gender-matched controls. The plasma concentrations of 11 LPPs were measured, using sandwich-type time-resolved immunofluorometric assays in patients and controls, and related to clinical diagnosis and disease activity. Three LPPs [H-ficolin (ficolin-3), L-ficolin (ficolin-2) and collectin liver 1 (CL-L1)] were significantly higher in axSpA patients than in controls (P < 0·0001) and one LPP, collectin kidney 1 (CL-K1), was significantly lower (P < 0·0001). Further, combining H- or L-ficolin concentrations above the 75th percentile of the respective H- or L-ficolin concentration measured in controls with human leucocyte antigen (HLA)-B27 positivity yielded axSpA diagnostic specificities of 99/99% and positive likelihood ratios of 68/62, respectively. H-ficolin and L-ficolin plasma concentrations were found to be elevated in axSpA patients regardless of time since diagnosis. H-ficolin and L-ficolin may represent diagnostic biomarkers for patients with axSpA and should be further evaluated. Our results showed no association between disease activity and the measured LPP concentrations. This result might be due to the cross-sectional design, and should be further investigated.
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Affiliation(s)
- A. Troldborg
- Department of RheumatologyAarhus University HospitalAarhusDenmark
- Department of BiomedicineAarhus UniversityAarhusDenmark
- Department of Clinical MedicineAarhusDenmark
| | - S. Thiel
- Department of BiomedicineAarhus UniversityAarhusDenmark
| | - C. E. Mistegaard
- Department of RheumatologyAarhus University HospitalAarhusDenmark
| | - A. Hansen
- Department of BiomedicineAarhus UniversityAarhusDenmark
| | | | | | - A. G. Loft
- Department of RheumatologyAarhus University HospitalAarhusDenmark
- Department of Clinical MedicineAarhusDenmark
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10
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Holt CB, Østergaard JA, Thiel S, Hansen TK, Mellbin L, Sörensson P, Bjerre M. Circulating lectin pathway proteins do not predict short-term cardiac outcomes after myocardial infarction. Clin Exp Immunol 2019; 198:94-100. [PMID: 31104331 PMCID: PMC6718281 DOI: 10.1111/cei.13315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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] [Accepted: 05/14/2019] [Indexed: 12/20/2022] Open
Abstract
Despite improvements in treatment, coronary artery disease is still responsible for one-third of all deaths globally, due predominantly to myocardial infarction (MI) and stroke. There is an important potential in developing new strategies for treatment of patients with these conditions. Inflammation, and in particular the actions of the complement system, has emerged as part of the pathogenesis in reperfusion injury in patients with MI. To further qualify this, we examined the association between the plasma levels of lectin pathway proteins and myocardial end-points, left ventricular ejection fraction (LVEF) and infarct size in a cohort of patients with ST-elevation myocardial infarction (STEMI). A blood sample was drawn the day after percutaneous coronary intervention from 73 patients with STEMI. The primary end-points, LVEF and infarct size, were measured with magnetic resonance imaging 6-9 days after the infarct. Complement pattern-recognition molecules of the lectin pathway (mannan-binding lectin, H-ficolin, L-ficolin and M-ficolin) were analysed along with soluble membrane attack complex (sMAC) and C-reactive protein (CRP) in plasma with immunofluorometric assays <50%. CRP correlated negatively with LVEF, regression coefficient = -0·17 (P = 0·01). None of the lectin pathway proteins correlated to LVEF or infarct size, nor did soluble membrane attack complex (sMAC). There were no differences in plasma levels of these complement proteins when comparing patients with ejection fraction <50% to patients with ejection fraction <50%. Pattern-recognition molecules of the lectin pathway and sMAC do not predict short-term cardiac outcomes after MI.
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Affiliation(s)
- C. B. Holt
- Steno Diabetes Center AarhusAarhus University HospitalAarhusDenmark
- Department of BiomedicineAarhus UniversityAarhusDenmark
- Medical Research Laboratory, Department of Clinical MedicineAarhus UniversityAarhusDenmark
| | - J. A. Østergaard
- Steno Diabetes Center AarhusAarhus University HospitalAarhusDenmark
- Department of Endocrinology and Internal MedicineAarhus University HospitalAarhusDenmark
| | - S. Thiel
- Department of BiomedicineAarhus UniversityAarhusDenmark
| | - T. K. Hansen
- Steno Diabetes Center AarhusAarhus University HospitalAarhusDenmark
| | - L. Mellbin
- Department of Medicine SolnaKarolinska InstituteStockholmSweden
- Department of CardiologyKarolinska University HospitalStockholmSweden
| | - P. Sörensson
- Department of Molecular Medicine and SurgeryKarolinska Institutet and Karolinska University Hospital SolnaStockholmSweden
| | - M. Bjerre
- Medical Research Laboratory, Department of Clinical MedicineAarhus UniversityAarhusDenmark
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11
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Sandgaard E, Troldborg A, Lauridsen SV, Gyldenholm T, Thiel S, Hvas AM. Changes in the Lectin Pathway Following Intracerebral or Spontaneous Subarachnoid Hemorrhage. Mol Neurobiol 2019; 56:78-87. [PMID: 29675579 DOI: 10.1007/s12035-018-1066-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 10/10/2017] [Accepted: 04/08/2018] [Indexed: 12/13/2022]
Abstract
Previous research indicates that the complement system is activated after occurrence of intracerebral hemorrhage (ICH) and spontaneous subarachnoid hemorrhage (SAH). The role of the lectin pathway (LP) of the complement system in this activation has only scarcely been investigated. The aim of this study was to determine the plasma concentration of the LP proteins in patients with ICH or SAH at admission compared to healthy individuals. Secondly, ICH and SAH patients were followed during the initial 24 h of disease, to investigate changes in LP protein concentrations during the critical acute phase. This prospective, observational study included 30 ICH and 33 SAH patients. EDTA plasma samples were collected at admission, 6 and 24 h after symptom onset. Time-resolved immuno-flourometric assays (TRIFMA) were used to measure all proteins of the LP in patient samples and in samples from age- and gender-matched healthy individuals. Compared to healthy individuals, ICH and SAH patients had increased levels of H-ficolin (p = 0.04, p = 0.03), M-ficolin (both p < 0.0001), and MAp44 (both p = 0.01) at admission. M-ficolin, H-ficolin, CL-L1, MASP-1, MASP-3, and MAp44 decreased significantly in both ICH and SAH patients during the initial 24 h after symptom onset. In conclusion, we observed significant differences in lectin pathway protein concentrations between patients with ICH or SAH and healthy individuals. Significant dynamics in lectin pathway protein levels were demonstrated during the initial 24 h after symptom onset. This indicates a potential role of the LP proteins during the acute phase of SAH and ICH.
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Affiliation(s)
- E Sandgaard
- Centre for Hemophilia and Thrombosis, Department of Clinical Biochemistry, Aarhus University Hospital, Palle Juul Jensens Boulevard 99, DK-8200, Aarhus N, Denmark
| | - A Troldborg
- Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 82, 8200, Aarhus N, Denmark
- Department of Biomedicine, Health Aarhus University, Vennelyst Boulevard 4, 8000, Aarhus C, Denmark
| | - S V Lauridsen
- Department of Anesthesiology and Intensive Care, Aarhus University Hospital, Palle Juul Jensens Boulevard 99, 8200, Aarhus N, Denmark
| | - T Gyldenholm
- Centre for Hemophilia and Thrombosis, Department of Clinical Biochemistry, Aarhus University Hospital, Palle Juul Jensens Boulevard 99, DK-8200, Aarhus N, Denmark
| | - S Thiel
- Department of Biomedicine, Health Aarhus University, Vennelyst Boulevard 4, 8000, Aarhus C, Denmark
| | - Anne-Mette Hvas
- Centre for Hemophilia and Thrombosis, Department of Clinical Biochemistry, Aarhus University Hospital, Palle Juul Jensens Boulevard 99, DK-8200, Aarhus N, Denmark.
- Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 82, 8200, Aarhus N, Denmark.
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12
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Haugaard SF, Jeppesen AN, Troldborg A, Kirkegaard H, Thiel S, Hvas AM. The complement lectin pathway after cardiac arrest. Scand J Immunol 2018; 88:e12680. [PMID: 29885250 DOI: 10.1111/sji.12680] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 06/05/2018] [Indexed: 02/06/2023]
Abstract
The lectin pathway (LP) of the complement system may initiate inflammatory reactions when body tissue is altered. We aimed to investigate the levels of the LP proteins in out-of-hospital cardiac arrest patients, and to compare these with healthy individuals. Furthermore, we aimed to clarify whether the duration of targeted temperature management influenced LP protein levels, and we further examined whether LP proteins were associated with 30-day mortality. We included 82 patients resuscitated from out-of-hospital cardiac arrest. The patients were randomly assigned to 24 or 48 hours of targeted temperature management at 33 ± 1°C. Blood samples were obtained 22, 46 and 70 hours after target temperature was reached. Levels of the LP proteins (mannan-binding lectin [MBL], M-ficolin, H-ficolin, collectin liver 1 [CL-L1], MBL-associated serine protease 1 [MASP-1], MASP-2, MASP-3 and MBL-associated protein of 44 kDa [MAp44]) were measured using time-resolved immunofluorometric assays. Data from 82 gender matched healthy individuals were used for comparison. Levels of CL-L1, MASP-1, MASP-2 and MAp44 were significantly higher, whereas M-ficolin levels were significantly lower in cardiac arrest patients compared with healthy individuals. MASP-2, MASP-3 and M-ficolin levels changed significantly when comparing 24 and 48 hours of targeted temperature management. The LP protein levels were not different between 30-day survivors and non-survivors after cardiac arrest. The differences in LP protein levels between patients and healthy individuals may indicate that cardiac arrest patients have an activated LP. Overall, the LP protein levels were not influenced by the duration of targeted temperature management, and the levels were not associated with 30-day mortality.
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Affiliation(s)
- S F Haugaard
- Department of Clinical Biochemistry, Centre for Hemophilia and Thrombosis, Aarhus University Hospital, Aarhus, Denmark
| | - A N Jeppesen
- Department of Anesthesiology and Intensive Care, Aarhus University Hospital, Aarhus, Denmark
| | - A Troldborg
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - H Kirkegaard
- Research Centre for Emergency Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - S Thiel
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - A-M Hvas
- Department of Clinical Biochemistry, Centre for Hemophilia and Thrombosis, Aarhus University Hospital, Aarhus, Denmark
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13
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Schmitz A, Korbel R, Thiel S, Wörle B, Gohl C, Rinder M. High prevalence of Mycobacterium genavense within flocks of pet birds. Vet Microbiol 2018; 218:40-44. [PMID: 29685219 DOI: 10.1016/j.vetmic.2018.03.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [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: 01/22/2018] [Revised: 03/20/2018] [Accepted: 03/20/2018] [Indexed: 11/18/2022]
Abstract
Mycobacterium genavense is regarded as the primary cause of mycobacteriosis in psittaciform and passeriform birds, which are commonly kept as pets. In humans, Mycobacterium genavense is especially pathogenic for young, old, pregnant and immunocompromised people (YOPIs). In birds, only few studies, mainly case reports, exist and there is still little e information about occurrence and relevance of this zoonotic pathogen. In this first pilot study concerning the prevalence of Mycobacterium genavense within flocks of naturally infected pet birds, real-time PCR examinations of 170 individual passeriform and psittaciform birds, including commonly kept budgerigars, lovebirds and zebra finches as well as gold finches and weaver finches, were conducted to determine the infection rate in six different aviaries. Antemortem examinations of faeces and cloacal swabs were compared with postmortem examinations of tissue samples to evaluate the reliability of antemortem diagnostics. Additional ophthalmologic examinations were performed to evaluate their diagnostic potential. Molecular examinations for viral co-infections, including circovirus, polyomavirus and adenovirus, were conducted to identify potential risk factors. PCR results revealed a detection prevalence of Mycobacterium genavense in the flocks varying from 3% to 91% based on postmortem testing, while antemortem diagnostics of faecal samples and swabs showed 64% discrepant (false negative) results. Ophthalmologic examinations were not useful in identifying infected birds within the flocks. Viral co-infections, especially with polyomavirus, were common. It has to be assumed that Mycobacterium genavense infections are widespread and underdiagnosed in companion birds. Viral infections might be an important risk factor. There is urgent need to improve antemortem diagnostics.
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Affiliation(s)
- A Schmitz
- Centre for Clinical Veterinary Medicine, Clinic for Birds, Small Mammals, Reptiles and Ornamental Fish, Ludwig-Maximilians-Universität München, Sonnenstr. 18, 85476, Oberschleißheim, Germany.
| | - R Korbel
- Centre for Clinical Veterinary Medicine, Clinic for Birds, Small Mammals, Reptiles and Ornamental Fish, Ludwig-Maximilians-Universität München, Sonnenstr. 18, 85476, Oberschleißheim, Germany
| | - S Thiel
- Centre for Clinical Veterinary Medicine, Clinic for Birds, Small Mammals, Reptiles and Ornamental Fish, Ludwig-Maximilians-Universität München, Sonnenstr. 18, 85476, Oberschleißheim, Germany
| | - B Wörle
- Max Planck Institute for Ornithology, Eberhard-Gwinner-Straße 5, 82319, Seewiesen (Starnberg), Germany
| | - C Gohl
- Tierpark Hellabrunn, Tierparkstraße 30, 81543, München, Germany
| | - M Rinder
- Centre for Clinical Veterinary Medicine, Clinic for Birds, Small Mammals, Reptiles and Ornamental Fish, Ludwig-Maximilians-Universität München, Sonnenstr. 18, 85476, Oberschleißheim, Germany
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14
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Schroyen S, Adam S, Marquet M, Jerusalem G, Thiel S, Giraudet AL, Missotten P. Communication of healthcare professionals: Is there ageism? Eur J Cancer Care (Engl) 2017; 27. [PMID: 28960583 DOI: 10.1111/ecc.12780] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/30/2017] [Indexed: 11/28/2022]
Abstract
Elderspeak is often used when talking to older individuals and is characterised by a slower and/or louder speech, a patronising tone, etc. A part of the reason of such communication can be found in the actual context of negative view of ageing. However, the link between view of ageing and elderspeak has never been objectively studied in oncology. Therefore, 40 healthcare professionals (physicians and medical students) record a podcast where they have to explain an endocrine therapy to two fictional patients (40- vs. 70-year old). Results show that when participants explained the treatment to the older patient, they used shorter utterances and made more repetitions. They also evoked fewer side effects such as sexual issues. Moreover, reduction in length of utterances and of word-per-minute rate was observed for older patient when participants have a positive view of ageing but for both patients when they have a negative view of ageing. In conclusion, physicians and medical students used elderspeak when they explained a treatment to older patients. Participants with a more negative view of ageing also unconsciously talked slower and made shorter utterances to a 40 -year-old patient.
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Affiliation(s)
- S Schroyen
- Psychology of Aging Unit, University of Liège, Liège, Belgium.,INSERM U1219 Bordeaux Population Health, University of Bordeaux, Bordeaux, France
| | - S Adam
- Psychology of Aging Unit, University of Liège, Liège, Belgium
| | - M Marquet
- Psychology of Aging Unit, University of Liège, Liège, Belgium
| | - G Jerusalem
- Department of Medical Oncology, CHU Sart-Tilman Liège and University of Liège, Liège, Belgium
| | - S Thiel
- Psychology of Aging Unit, University of Liège, Liège, Belgium
| | - A-L Giraudet
- Psychology of Aging Unit, University of Liège, Liège, Belgium
| | - P Missotten
- Psychology of Aging Unit, University of Liège, Liège, Belgium
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15
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Østergaard JA, Thiel S, Hoffmann-Petersen IT, Hovind P, Parving HH, Tarnow L, Rossing P, Hansen TK. Incident microalbuminuria and complement factor mannan-binding lectin-associated protein 19 in people with newly diagnosed type 1 diabetes. Diabetes Metab Res Rev 2017; 33. [PMID: 28303635 DOI: 10.1002/dmrr.2895] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 02/09/2017] [Accepted: 02/24/2017] [Indexed: 11/12/2022]
Abstract
BACKGROUND Evidence links the lectin pathway of complement activation to diabetic kidney disease. Upon carbohydrate-recognition by pattern-recognition molecules, eg, mannan-binding lectin (MBL), the MBL-associated serine protease (MASP-2) is activated and initiates the complement cascade. The MASP2 gene encodes MASP-2 and the alternative splice product MBL-associated protein 19 (MAp19). Both MAp19 and MASP-2 circulate in complex with MBL. We tested the hypothesis that MAp19 and MASP-2 concentrations predict the risk of incident microalbuminuria. METHODS Baseline MAp19 and MASP-2 were measured in 270 persons with newly diagnosed type 1 diabetes tracked for incidence of persistent microalbuminuria in a prospective observational 18-year-follow-up study. RESULTS Seventy-five participants (28%) developed microalbuminuria during follow-up. MBL-associated protein 19 concentrations were higher in participants that later progressed to microalbuminuria as compared with those with persistent normoalbuminuria (268 ng/mL [95% CI, 243-293] vs 236 ng/mL [95% CI, 223-250], P = .02). Participants with MAp19 concentration within the highest quartile of the cohort had an increased risk of microalbuminuria as compared with participants with MAp19 concentration within the combined lower 3 quartiles in unadjusted Cox analysis, hazard ratio 1.86 ([95% CI, 1.17-2.96], P = .009). This remained significant in adjusted models, eg, adjusting for age, sex, HbA1c , systolic blood pressure, urinary albumin excretion, smoking, serum creatinine, and serum cholesterol. MBL-associated serine protease concentration was not associated with incidence of microalbuminuria. CONCLUSIONS In conclusion, the results show an association between baseline MAp19 concentration and the incidence of microalbuminuria in an 18-year-follow-up study on persons with newly diagnosed type 1 diabetes.
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Affiliation(s)
- J A Østergaard
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital and Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
- The Danish Diabetes Academy, Odense, Denmark
| | - S Thiel
- Department of Biomedicine, Faculty of Health, Aarhus University, Aarhus, Denmark
| | - I T Hoffmann-Petersen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital and Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
| | - P Hovind
- Department of Clinical Physiology, Nuclear Medicine & PET, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - H-H Parving
- Department of Endocrinology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - L Tarnow
- Steno Diabetes Center, Gentofte, Denmark
- Nordsjaellands Hospital, Hillerød, Denmark
- Faculty of Health, Aarhus University, Aarhus, Denmark
| | - P Rossing
- Steno Diabetes Center, Gentofte, Denmark
- Faculty of Health, Aarhus University, Aarhus, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - T K Hansen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital and Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
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16
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Krogh SS, Holt CB, Steffensen R, Funck KL, Høyem P, Laugesen E, Poulsen PL, Thiel S, Hansen TK. Plasma levels of MASP-1, MASP-3 and MAp44 in patients with type 2 diabetes: influence of glycaemic control, body composition and polymorphisms in the MASP1 gene. Clin Exp Immunol 2017; 189:103-112. [PMID: 28318015 DOI: 10.1111/cei.12963] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/14/2017] [Indexed: 02/07/2023] Open
Abstract
Mounting evidence indicates that adverse activation of the complement system plays a role in the development of diabetic vascular complications. Plasma levels of the complement proteins mannan-binding lectin (MBL) and its associated serine proteases (MASP-1 and MASP-2) are elevated in diabetes. We hypothesized that single nucleotide polymorphisms (SNPs) in the MASP1 gene may contribute to altered plasma levels of the belonging gene products; MASP-1, MASP-3 and mannan-binding lectin-associated protein of 44 kDa (MAp44) in patients with type 2 diabetes. To investigate this, we compared plasma levels of MASP-1, MASP-3 and MAp44 in 100 patients with type 2 diabetes and 100 sex- and age-matched controls. Ten carefully selected SNPs were analysed using TaqMan® genotyping assay. Additionally, we included a streptozotocin-induced diabetes mouse model to directly examine the effect of inducing diabetes on MASP-1 levels. MASP-1 levels were significantly higher among patients with type 2 diabetes compared with healthy controls (P = 0·017). Five SNPs (rs874603, rs72549254, rs3774275, rs67143992, rs850312) in the MASP1 gene were associated with plasma levels of MASP-1, MASP-3 and MAp44. In the diabetes mouse model, diabetic mice had significantly higher MASP-1 levels than control mice (P = 0·003). In conclusion, MASP-1 levels were higher among patients with type 2 diabetes and diabetic mice. The mechanism behind this increase remains elusive.
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Affiliation(s)
- S S Krogh
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - C B Holt
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - R Steffensen
- Department of Clinical Immunology, Aalborg University Hospital, Aalborg, Denmark
| | - K L Funck
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - P Høyem
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - E Laugesen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - P L Poulsen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - S Thiel
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - T K Hansen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
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17
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Kjaer TR, Jensen L, Hansen A, Dani R, Jensenius JC, Dobó J, Gál P, Thiel S. Oligomerization of Mannan-binding Lectin Dictates Binding Properties and Complement Activation. Scand J Immunol 2017; 84:12-9. [PMID: 27104295 DOI: 10.1111/sji.12441] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 04/13/2016] [Indexed: 01/13/2023]
Abstract
The complement system is a part of the innate immune system and is involved in recognition and clearance of pathogens and altered-self structures. The lectin pathway of the complement system is initiated when soluble pattern recognition molecules (PRMs) with collagen-like regions bind to foreign or altered self-surfaces. Associated with the collagen-like stems of these PRMs are three mannan-binding lectin (MBL)-associated serine proteases (MASPs) and two MBL-associated proteins (MAps). The most studied of the PRMs, MBL, is present in serum mainly as trimeric and tetrameric oligomers of the structural subunit. We hypothesized that oligomerization of MBL may influence both the potential to bind to micro organisms and the interaction with the MASPs and MAps, thus influencing the ability to initiate complement activation. When testing binding at 37 °C, we found higher binding of tetrameric MBL to Staphylococcus aureus (S. aureus) than trimeric and dimeric MBL. In serum, we found that tetrameric MBL was the main oligomeric form present in complexes with the MASPs and MAp44. Such preference was confirmed using purified forms of recombinant MBL (rMBL) oligomers, where tetrameric rMBL interacted stronger with all of the MASPs and MAp44, compared to trimeric MBL. As a direct consequence of the weaker interaction with the MASPs, we found that trimeric rMBL was inferior to tetrameric rMBL in activating the complement system. Our data suggest that the oligomeric state of MBL is crucial both for the binding properties and the effector function of MBL.
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Affiliation(s)
- T R Kjaer
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - L Jensen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - A Hansen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - R Dani
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - J C Jensenius
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - J Dobó
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - P Gál
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - S Thiel
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
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18
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Troldborg A, Hansen A, Hansen SWK, Jensenius JC, Stengaard-Pedersen K, Thiel S. Lectin complement pathway proteins in healthy individuals. Clin Exp Immunol 2017; 188:138-147. [DOI: 10.1111/cei.12909] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/22/2016] [Indexed: 12/20/2022] Open
Affiliation(s)
- A. Troldborg
- Department of Rheumatology, Aarhus University; Aarhus Denmark
- Institute of Clinical Medicine, Aarhus University; Aarhus Denmark
| | - A. Hansen
- Department of Biomedicine; Aarhus University; Aarhus Denmark
| | - S. W. K. Hansen
- Institute of Molecular Medicine; University of Southern Denmark; Odense Denmark
| | - J. C. Jensenius
- Department of Biomedicine; Aarhus University; Aarhus Denmark
| | - K. Stengaard-Pedersen
- Department of Rheumatology, Aarhus University; Aarhus Denmark
- Institute of Clinical Medicine, Aarhus University; Aarhus Denmark
| | - S. Thiel
- Department of Biomedicine; Aarhus University; Aarhus Denmark
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19
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Smedbråten J, Sagedal S, Åsberg A, Hartmann A, Rollag H, Mjøen G, Fagerland MW, Hansen SWK, Mollnes TE, Thiel S. Collectin Liver 1 and Collectin Kidney 1 of the Lectin Complement Pathway Are Associated With Mortality After Kidney Transplantation. Am J Transplant 2017; 17:265-271. [PMID: 27341702 DOI: 10.1111/ajt.13933] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 06/16/2016] [Accepted: 06/16/2016] [Indexed: 01/25/2023]
Abstract
Kidney transplanted patients still have significantly higher mortality compared with the general population. The innate immune system may play an important role during periods, with suppression of the adaptive immune system. In the present study, two soluble pattern recognition molecules of the innate immune system were investigated, collectin liver 1 (CL-L1) and collectin kidney 1 (CL-K1). Potential associations of their pretransplant levels and long-term graft and recipient survival were examined. The levels of CL-L1 and CL-K1 were measured at the time of transplantation in 382 patients (≥17 years) transplanted in 2000-2001. The cohort was subsequently followed until December 31, 2014. Data on patient and graft survival were obtained from the Norwegian Renal Registry. Both high CL-L1 (≥376 ng/mL) and high CL-K1 (≥304 ng/mL) levels were significantly associated with overall mortality in multivariate Cox analyses with hazard ration (HR) 1.50, 95% confidence interval (CI) 1.09-2.07, p = 0.013 and HR 1.43, 95% CI 1.02-1.99, p = 0.038, respectively. Moreover, high CL-K1 levels were significantly associated with cardiovascular mortality. No association between measured biomarkers and death-censored graft loss was found. Finally, there was a significant correlation between these two collectins, r = 0.83 (95% CI 0.80-0.86). In conclusion, CL-L1 and CL-K1 were significantly associated with mortality in kidney transplant recipients.
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Affiliation(s)
- J Smedbråten
- Department of Nephrology, Ullevål Oslo University Hospital, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway
| | - S Sagedal
- Department of Nephrology, Ullevål Oslo University Hospital, Oslo, Norway
| | - A Åsberg
- Department of Transplant Medicine, Rikshospitalet Oslo University Hospital, Oslo, Norway.,Norwegian Renal Registry, Oslo University Hospital, Oslo, Norway.,School of Pharmacy, University of Oslo, Oslo, Norway
| | - A Hartmann
- Faculty of Medicine, University of Oslo, Oslo, Norway.,Department of Transplant Medicine, Rikshospitalet Oslo University Hospital, Oslo, Norway
| | - H Rollag
- Faculty of Medicine, University of Oslo, Oslo, Norway.,Department of Microbiology, Rikshospitalet Oslo University Hospital, Oslo, Norway
| | - G Mjøen
- Department of Transplant Medicine, Rikshospitalet Oslo University Hospital, Oslo, Norway
| | - M W Fagerland
- Oslo Centre for Biostatistics and Epidemiology, Research Support Services, Oslo University Hospital, Oslo, Norway
| | - S W K Hansen
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - T E Mollnes
- Faculty of Medicine, University of Oslo, Oslo, Norway.,Department of Immunology, Oslo University Hospital Rikshospitalet and K. G. Jebsen IRC, University of Oslo, Oslo, Norway.,Research Laboratory, Nordland Hospital, Bodø, Norway.,Faculty of Health Sciences, K. G. Jebsen TREC, University of Tromsø, Tromsø, Norway.,Center of Molecular Inflammation Research, Norwegian University of Science and Technology, Trondheim, Norway
| | - S Thiel
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
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20
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Behrens J, Schmidt-Ohlemann M, Martin N, Grune K, Janßen H, Köhler L, Siegert R, Warnach M, Kraft JW, Naumann F, Pflug M, Thiel S, Wolf M. RCT und (Selbst-)Auswahlbias: Die Wirksamkeit von Rehabilitation am Beispiel Mobiler geriatrischer Rehabilitation von Bewohnerinnen stationärer Pflegeeinrichtungen. Gesundheitswesen 2016. [DOI: 10.1055/s-0036-1586516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Behrens J, Schmidt-Ohlemann M, Martin N, Grune K, Janßen H, Köhler L, Siegert R, Warnach M, Kraft JW, Naumann F, Pflug M, Thiel S, Wolf M. Die Verwechslung von Zielen und Mitteln: Kein Assessment misst das Erreichen des gesetzlichen Rehazieles, oder? Gesundheitswesen 2016. [DOI: 10.1055/s-0036-1586703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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22
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Troldborg A, Thiel S, Jensen L, Hansen S, Laska MJ, Deleuran B, Jensenius JC, Stengaard-Pedersen K. Collectin liver 1 and collectin kidney 1 and other complement-associated pattern recognition molecules in systemic lupus erythematosus. Clin Exp Immunol 2015; 182:132-8. [PMID: 26154564 PMCID: PMC4608502 DOI: 10.1111/cei.12678] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [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: 06/19/2015] [Revised: 07/02/2015] [Accepted: 07/03/2015] [Indexed: 11/30/2022] Open
Abstract
The objective of this study was to explore the involvement of collectin liver 1 (CL-L1) and collectin kidney 1 (CL-K1) and other pattern recognition molecules (PRMs) of the lectin pathway of the complement system in a cross-sectional cohort of systemic lupus erythematosus (SLE) patients. Concentrations in plasma of CL-L1, CL-K1, mannan-binding lectin (MBL), M-ficolin, H-ficolin and L-ficolin were determined in 58 patients with SLE and 65 healthy controls using time-resolved immunoflourometric assays. The SLE patients' demographic, diagnostic, clinical and biochemical data and collection of plasma samples were performed prospectively during 4 months. CL-L1, CL-K1 and M-ficolin plasma concentrations were lower in SLE patients than healthy controls (P-values < 0.001, 0.033 and < 0.001, respectively). H-ficolin concentration was higher in SLE patients (P < 0.0001). CL-L1 and CL-K1 plasma concentrations in the individuals correlated in both patients and controls. Patients with low complement component 3 (C3) demonstrated a negative correlation between C3 and CL-L1 and CL-K1 (P = 0.022 and 0.031, respectively). Patients positive for anti-dsDNA antibodies had lower levels of MBL in plasma than patients negative for anti-dsDNA antibodies (P = 0.02). In a cross-sectional cohort of SLE patients, we found differences in the plasma concentrations of CL-L1, CL-K1, M-ficolin and H-ficolin compared to a group of healthy controls. Alterations in plasma concentrations of the PRMs of the lectin pathway in SLE patients and associations to key elements of the disease support the hypothesis that the lectin pathway plays a role in the pathogenesis of SLE.
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Affiliation(s)
- A Troldborg
- Center of Cancer and InflammationDepartment of Rheumatology, Aarhus University Hospital, Aarhus University
- Institute of Clinical Medicine, Aarhus University
| | - S Thiel
- Department of Biomedicine, Aarhus University
| | - L Jensen
- Department of Biomedicine, Aarhus University
| | - S Hansen
- Department of Cancer and Inflammation Research, University of Southern Denmark
| | - M J Laska
- Department of Biomedicine, Aarhus University
| | - B Deleuran
- Center of Cancer and InflammationDepartment of Rheumatology, Aarhus University Hospital, Aarhus University
- Department of Biomedicine, Aarhus University
| | | | - K Stengaard-Pedersen
- Center of Cancer and InflammationDepartment of Rheumatology, Aarhus University Hospital, Aarhus University
- Institute of Clinical Medicine, Aarhus University
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23
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Endler M, Brucker B, Bykov V, Cardella A, Carls A, Dobmeier F, Dudek A, Fellinger J, Geiger J, Grosser K, Grulke O, Hartmann D, Hathiramani D, Höchel K, Köppen M, Laube R, Neuner U, Peng X, Rahbarnia K, Rummel K, Sieber T, Thiel S, Vorköper A, Werner A, Windisch T, Ye M. Engineering design for the magnetic diagnostics of Wendelstein 7-X. Fusion Engineering and Design 2015. [DOI: 10.1016/j.fusengdes.2015.07.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Korbel R, Schubert M, Erhard M, Wöhr C, Bergmann S, Rückschloss S, Thiel S, Engelhardt H, Engelhardt S. [Considerations and recommondations for species-appropriate and welfare friendly keeping of ratitae in Germany]. Tierarztl Prax Ausg G Grosstiere Nutztiere 2015; 43:232-44. [PMID: 26235357 DOI: 10.15653/tpg-150490] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 07/23/2015] [Indexed: 11/22/2022]
Abstract
Ostrich farming and keeping in Germany is of increasing interest. Ostrich farming includes keeping the animals as agricultural livestock (production of meat, leather, eggs), for display, hobby farming and keeping in zoological collections. Based on scientific research there is a steady increase in knowledge of keeping ratites according to sophisticated standards in terms of animal welfare legislation. Legislation and recommondations for keeping of ratitae are described.
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Affiliation(s)
- R Korbel
- Prof. Dr. Rüdiger Korbel, Dip. ECZM (Avian), Zentrum für klinische Tiermedizin, Klinik für Vögel, Reptilien, Amphibien und Zierfische, Ludwig-Maximilians-Universität München, Sonnenstraße 18, 85764 Oberschleißheim, E-Mail:
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25
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Jenny L, Ajjan R, King R, Thiel S, Schroeder V. Plasma levels of mannan-binding lectin-associated serine proteases MASP-1 and MASP-2 are elevated in type 1 diabetes and correlate with glycaemic control. Clin Exp Immunol 2015; 180:227-32. [PMID: 25533914 DOI: 10.1111/cei.12574] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/17/2014] [Indexed: 12/17/2022] Open
Abstract
There is increasing evidence that the complement system plays an important role in diabetes and the development of diabetic vascular complications. In particular, mannan-binding lectin (MBL) levels are elevated in diabetes patients, and diabetes patients with diabetic nephropathy have higher MBL levels than diabetes patients with normal renal function. The MBL-associated serine proteases (MASPs) MASP-1, MASP-2 and MASP-3 and MBL-associated protein MAp44 have not yet been studied in diabetes patients. We therefore measured plasma levels of MASP-1, MASP-2, MASP-3 and MAp44 in 30 children with type 1 diabetes mellitus (T1DM) and 17 matched control subjects, and in 45 adults with T1DM and 31 matched control subjects. MASP-1 and MASP-2 levels were significantly higher in children and adults with T1DM than in their respective control groups, whereas MASP-3 and MAp44 levels did not differ between patients and controls. MASP-1 and MASP-2 levels correlated with HbA1c, and MASP levels decreased when glycaemic control improved. Because MASP-1 and MASP-2 have been shown to interact directly with blood coagulation, elevated levels of these proteins may play a role in the enhanced thrombotic environment and consequent vascular complications in diabetes.
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Affiliation(s)
- L Jenny
- University Clinic of Haematology, Haemostasis Research Laboratory, University Hospital of Bern, Bern, Switzerland; Department of Clinical Research, University of Bern, Bern, Switzerland
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26
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Ammitzbøll C, Steffensen R, Thiel S, Jensenius J, Hørslev-Petersen K, Ellingsen T, Hetland M, Junker P, Østergaard M, Stengaard-Pedersen K. OP0073 Polymorphisms in the FCN1 Gene Coding for M-Ficolin are Associated with Disease Activity, Radiographic Damage and are the Strongest Predictors of DAS28 Remission in 180 DMARD Naive Early Rheumatoid Arthritis Patients. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.1521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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27
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Thiel S, Kollmeier J, Schäfer M, Griff S, Förster GJ, Bittner R, Bauer TT. Fallbericht: Ansprechen eines atypischen Karzinoides auf Temozolomid/Capecitabine in vierter Therapielinie. Pneumologie 2015. [DOI: 10.1055/s-0035-1544660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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28
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Misch D, Crolow C, Boch C, Thiel S, Blum T, Kollmeier J, Schönfeld N, Bauer TT. Chemotherapieansprechen jenseits der 3. Linie beim Nichtkleinzelligen Lungenkarzinom (NSCLC). Pneumologie 2015. [DOI: 10.1055/s-0035-1544737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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29
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Fliedner F, Avsar K, Hoffmann H, Thiel S, Behr J. Erworbene Resistenz gegenüber Chinolonen unter Behandlung einer MDR-Tuberkulose. Pneumologie 2015. [DOI: 10.1055/s-0035-1544803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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30
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Schachtner T, Reinke P, Dorje C, Mjoen G, Midtvedt K, Strom EH, Oyen O, Jenssen T, Reisaeter AV, Smedbraaten YV, Sagedal S, Mjoen G, Fagerland MW, Hartmann A, Thiel S, Zulkarnaev A, Vatazin A, Vincenti F, Harel E, Kantor A, Thurison T, Hoyer-Hansen G, Craik C, Kute VB, Shah PS, Vanikar AV, Modi PR, Shah PR, Gumber MR, Patel HV, Engineer DP, Shah VR, Rizvi J, Trivedi HL, Malheiro J, Dias L, Martins LS, Fonseca I, Pedroso S, Almeida M, Castro-Henriques A, Cabrita A, Costa C, Ritta M, Sinesi F, Sidoti F, Mantovani S, Di Nauta A, Messina M, Cavallo R, Verflova A, Svobodova E, Slatinska J, Slavcev A, Pokorna E, Viklicky O, Yagan J, Chandraker A, Messina M, Diena D, Tognarelli G, Ranghino A, Bussolino S, Fop F, Segoloni GP, Biancone L, Leone F, Mauro MV, Gigliotti P, Lofaro D, Greco F, Perugini D, Papalia T, Perri A, Vizza D, Giraldi C, Bonofilgio R, Luis-Lima S, Marrero D, Gonzalez-Rinne A, Torres A, Salido E, Jimenez-Sosa A, Aldea-Perona A, Gonzalez-Posada JM, Perez-Tamajon L, Rodriguez-Hernandez A, Negrin-Mena N, Porrini E, Mjoen G, Pihlstrom H, Dahle DO, Holdaas H, Von Der Lippe N, Waldum B, Brekke F, Amro A, Reisaeter AV, Os I, Klin P, Sanabria H, Bridoux P, De Francesco J, Fortunato RM, Raffaele P, Kong J, Son SH, Kwon HY, Whang EJ, Choi WY, Yoon CS, Thanaraj V, Theakstone A, Stopper K, Ferraro A, Bhattacharjya S, Devonald M, Williams A, Mella A, Messina M, Gallo E, Fop F, Di Vico MC, Diena D, Pagani F, Gai M, Ranghino A, Segoloni GP, Biancone L, Cho HJ, Nho KW, Park SK, Kim SB, Yoshida K, Ishii D, Ohyama T, Kohguchi D, Takeuchi Y, Varga A, Sandor B, Kalmar-Nagy K, Toth A, Toth K, Szakaly P, Zulkarnaev A, Vatazin A, Kildushevsky A, Fedulkina V, Kantaria R, Staeck O, Halleck F, Rissling O, Naik M, Neumayer HH, Budde K, Khadzhynov D, Bhadauria D, Kaul A, Prasad N, Sharma RK, Sezer S, Bal Z, Erkmen Uyar M, Guliyev O, Erdemir B, Colak T, Ozdemir N, Haberal M, Caliskan Y, Yazici H, Artan AS, Oto OA, Aysuna N, Bozfakioglu S, Turkmen A, Yildiz A, Sever MS, Yagisawa T, Nukui A, Kimura T, Nannmoku K, Kurosawa A, Sakuma Y, Miki A, Damiano F, Ligabue G, De Biasi S, Granito M, Cossarizza A, Cappelli G, Martins LS, Fonseca I, Malheiro J, Henriques AC, Pedroso S, Almeida M, Dias L, Davide J, Cabrita A, Von During ME, Jenssen TG, Bollerslev J, Godang K, Asberg A, Hartmann A, Bachelet T, Martinez C, Bello A, Kejji S, Couzi L, Guidicelli G, Lepreux S, Visentin J, Congy-Jolivet N, Rostaing L, Taupin JL, Kamar N, Merville P, Sezer S, Bal Z, Erkmen Uyar M, Ozdemir H, Guliyev O, Yildirim S, Tutal E, Ozdemir N, Haberal M, Sezer S, Erkmen Uyar M, Bal Z, Guliyev O, Sayin B, Colak T, Ozdemir Acar N, Haberal M, Banasik M, Boratynska M, Koscielska-Kasprzak K, Kaminska D, Bartoszek D, Mazanowska O, Krajewska M, Zmonarski S, Chudoba P, Dawiskiba T, Protasiewicz M, Halon A, Sas A, Kaminska M, Klinger M, Stefanovic N, Cvetkovic T, Velickovic - Radovanovic R, Jevtovic - Stoimenov T, Vlahovic P, Rungta R, Das P, Ray DS, Gupta S, Kolonko A, Szotowska M, Kuczera P, Chudek J, Wiecek A, Sikora-Grabka E, Adamczak M, Szotowska M, Kuczera P, Madej P, Wiecek A, Amanova A, Kendi Celebi Z, Bakar F, Caglayan MG, Keven K, Massimetti C, Imperato G, Zampi G, De Vincenzi A, Fabbri GDD, Brescia F, Feriozzi S, Filipov JJ, Zlatkov BK, Dimitrov EP, Svinarov DA, Poesen R, De Vusser K, Evenepoel P, Kuypers D, Naesens M, Meijers B, Kocak H, Yilmaz VT, Yilmaz F, Uslu HB, Aliosmanoglu I, Ermis H, Dinckan A, Cetinkaya R, Ersoy FF, Suleymanlar G, Fonseca I, Oliveira JC, Santos J, Martins LS, Almeida M, Dias L, Pedroso S, Lobato L, Castro-Henriques A, Mendonca D, Watarai Y, Yamamoto T, Tsujita M, Hiramitsu T, Goto N, Narumi S, Kobayashi T, Dahle DO, Holdaas H, Reisaeter AV, Dorje C, Mjoen G, Line PD, Hartmann A, Housawi A, House A, Ng C, Denesyk K, Rehman F, Moist L, Musetti C, Battista M, Izzo C, Guglielmetti G, Airoldi A, Stratta P, Musetti C, Cena T, Quaglia M, Fenoglio R, Cagna D, Airoldi A, Amoroso A, Stratta P, Palmisano A, Degli Antoni AM, Vaglio A, Piotti G, Cremaschi E, Buzio C, Maggiore U, Lee MC, Hsu BG, Zalamea Jarrin F, Sanchez Sobrino B, Lafuente Covarrubias O, Karsten Alvarez S, Dominguez Apinaniz P, Llopez Carratala R, Portoles Perez J, Yildirim T, Yilmaz R, Turkmen E, Altindal M, Arici M, Altun B, Erdem Y, Dounousi E, Mitsis M, Naka K, Pappas H, Lakkas L, Harisis H, Pappas K, Koutlas V, Tzalavra I, Spanos G, Michalis L, Siamopoulos K, Iwabuchi T, Yagisawa T, Kimura T, Nanmoku K, Kurosawa A, Yasunaru S, Lee MC, Hsu BG, Yoshikawa M, Kitamura K, Fuji H, Fujisawa M, Nishi S, Carta P, Zanazzi M, Buti E, Larti A, Caroti L, Di Maria L, Minetti EE, Shi Y, Luo L, Cai B, Wang T, Zou Y, Wang L, Kim Y, Kim HS, Choi BS, Park CW, Yang CW, Kim YS, Chung BH, Baek CH, Kim M, Kim JS, Yang WS, Han DJ, Park SK, Mikolasevic I, Racki S, Lukenda V, Persic MP, Colic M, Devcic B, Orlic L, Sezer S, Gurlek Demirci B, Guliyev O, Colak T, Say N CB, Ozdemir Acar FN, Haberal M, Vali S, Ismal K, Sahay M, Civiletti F, Cantaluppi V, Medica D, Mazzeo AT, Assenzio B, Mastromauro I, Deambrosis I, Giaretta F, Fanelli V, Mascia L, Musetti C, Airoldi A, Quaglia M, Guglielmetti G, Battista M, Izzo C, Stratta P, Lakkas L, Naka K, Dounousi E, Koutlas V, Gkirdis I, Bechlioulis A, Evangelou D, Zarzoulas F, Kotsia A, Balafa O, Tzeltzes G, Nakas G, Pappas K, Kalaitzidis R, Katsouras C, Michalis L, Siamopoulos K, Tutal E, Erkmen Uyar M, Uyanik S, Bal Z, Guliyev O, Toprak SK, Ilhan O, Sezer S, Bal Z, Ekmen Uyar M, Guliyev O, Sayin B, Colak T, Sezer S, Haberal M, Hernandez Vargas H, Artamendi Larranaga M, Ramalle Gomara E, Gil Catalinas F, Bello Ovalle A, Pimentel Guzman G, Coloma Lopez A, Sierra Carpio M, Gil Paraiso A, Dall Anesse C, Beired Val I, Huarte Loza E, Choy BY, Kwan L, Mok M, Chan TM, Yamakawa T, Kobayashi A, Yamamoto I, Mafune A, Nakada Y, Tannno Y, Tsuboi N, Yamamoto H, Yokoyama K, Ohkido I, Yokoo T, Luque Y, Anglicheau D, Rabant M, Clement R, Kreis H, Sartorius A, Noel LH, Timsit MO, Legendre C, Rancic N, Vavic N, Dragojevic-Simic V, Katic J, Jacimovic N, Kovacevic A, Mikov M, Veldhuijzen NMH, Rookmaaker MB, Van Zuilen AD, Nquyen TQ, Boer WH, Mjoen G, Pihlstrom H, Dahle DO, Holdaas H, Sahtout W, Ghezaiel H, Azzebi A, Ben Abdelkrim S, Guedri Y, Mrabet S, Nouira S, Ferdaws S, Amor S, Belarbia A, Zellama D, Mokni M, Achour A, Viklicky O, Parikova A, Slatinska J, Hanzal V, Fronek J, Orandi BJ, James NT, Montgomery RA, Desai NM, Segev DL, Fontana F, Ballestri M, Magistroni R, Damiano F, Cappelli G. TRANSPLANTATION CLINICAL 1. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Weiß T, Kollmeier J, Blum T, Boch C, Crolow C, Misch D, Thiel S, Rüssmann H, Bauer TT. Laktat-Dehydrogenase, C-reaktives Protein und Leukozytenzahl sind prognostische Parameter bei Patienten mit Kleinzelligem Lungenkarzinom (SCLC) im Stadium IIIa-IV. Pneumologie 2014. [DOI: 10.1055/s-0034-1367983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Crolow C, Blum TG, Kollmeier J, Griff S, Thiel S, Weiß T, Schönfeld N, Rüssmann H, Bauer TT. Prognostische Bedeutung von Blutbildparametern und histologischem Subtyp beim malignen Pleuramesotheliom. Pneumologie 2014. [DOI: 10.1055/s-0034-1367982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Misch D, Kollmeier J, Thiel S, Weiß T, Boch C, Theissig F, Mairinger T, Bauer TT. Das hepatoide Adenokarzinom der Lunge: Eine seltene Entität. Pneumologie 2014. [DOI: 10.1055/s-0034-1367960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Thiel S, Kollmeier J, Misch D, Griff S, Theissig F, Bittner R, Mairinger T, Bauer TT. EBV-assoziiertes diffus-großzelliges B-Zell-Lymphom (DLBCL) des Älteren – Zwei Fälle einer thorakalen Erstmanifestation. Pneumologie 2014. [DOI: 10.1055/s-0034-1367976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Gastmeier A, Blum TG, Kollmeier J, Griff S, Thiel S, Nehls W, Sabha T, Schönfeld N, Mairinger M, Bauer TT. Prognostische Relevanz von histologischen Subtypen beim Lungenkarzinom – Überlebensanalysen bei häufigen und seltenen Entitäten. Pneumologie 2014. [DOI: 10.1055/s-0034-1367979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kollmeier J, Stephan-Falkenau S, Blum T, Thiel S, Misch D, Griff S, Mairinger T, Bauer TT. Vergleich unterschiedlicher Antikörper (AK) zum immunhistochemischen Nachweis von ERCC1 beim Nichtkleinzelligen Lungenkarzinom (NSCLC). Pneumologie 2014. [DOI: 10.1055/s-0034-1367977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ammitzbøll C, Jensenius J, Ellingsen T, Thiel S, Hørslev-Petersen K, Hetland M, Junker P, Johansen J, Østergaard M, Pødenphant J, Stengaard-Pedersen K. OP0223 M-ficolin, an activator of the complement system, predicts DAS28 remission in early DMARD naïve rheumatoid arthritis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2012-eular.1906] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Brinkmann C, Jensen L, Dagnaes-Hansen F, Holm I, Endo Y, Fujita T, Thiel S, Jensenius J, Degn S. Mitochondria and the lectin pathway of complement. Mol Immunol 2013. [DOI: 10.1016/j.molimm.2013.05.181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Petri C, Thiel S, Jensenius JC, Kuno-Møller B, Herlin T. PReS-FINAL-2036: Proteins of the lectin pathway of the complement system in juvenile idiopathic arthritis. Pediatr Rheumatol Online J 2013. [PMCID: PMC4044483 DOI: 10.1186/1546-0096-11-s2-p49] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Frauenknecht V, Ajjan R, Thiel S, Schroeder V. Plasma levels of MASP-1 and MASP-2 are elevated in patients with type 1 diabetes. Mol Immunol 2013. [DOI: 10.1016/j.molimm.2013.05.100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Frauenknecht V, Thiel S, Storm L, Meier N, Arnold M, Schmid JP, Saner H, Schroeder V. Plasma levels of mannan-binding lectin (MBL)-associated serine proteases (MASPs) and MBL-associated protein in cardio- and cerebrovascular diseases. Clin Exp Immunol 2013; 173:112-20. [PMID: 23607747 DOI: 10.1111/cei.12093] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/05/2013] [Indexed: 01/15/2023] Open
Abstract
Growing evidence suggests a prominent role of the complement system in the pathogenesis of cardio- and cerebrovascular diseases (CVD). Mannan-binding lectin-associated serine proteases (MASPs) MASP-1 and MASP-2 of the complement lectin pathway contribute to clot formation and may represent an important link between inflammation and thrombosis. MBL-associated protein MAp44 has shown cardioprotective effects in murine models. However, MAp44 has never been measured in patients with CVD and data on MASP levels in CVD are scarce. Our aim was to investigate for the first time plasma levels of MAp44 and MASP-1, -2, -3 concomitantly in patients with CVD. We performed a pilot study in 50 healthy volunteers, in stable coronary artery disease (CAD) patients with one-vessel (n = 51) or three-vessel disease (n = 53) and age-matched controls with normal coronary arteries (n = 53), 49 patients after myocardial infarction (MI) and 66 patients with acute ischaemic stroke. We measured MAp44 and MASP-1 levels by in-house time-resolved immunofluorometric assays. MASP-2 and MASP-3 levels were measured using commercial enzyme-linked immunosorbent assay kits. MASP-1 levels were highest in subacute MI patients and lowest in acute stroke patients. MASP-2 levels were lower in MI and stroke patients compared with controls and CAD patients. MASP-3 and MAp44 levels did not differ between groups. MASP or MAp44 levels were not associated with severity of disease. MASP and MAp44 levels were associated with cardiovascular risk factors including dyslipidaemia, obesity and hypertension. Our results suggest that MASP levels may be altered in vascular diseases. Larger studies are needed to confirm our results and elucidate the underlying mechanisms.
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Affiliation(s)
- V Frauenknecht
- University Clinic of Haematology, Haemostasis Research Laboratory, University Hospital and University of Bern, Switzerland
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Affiliation(s)
- S. E. Degn
- Department of Biomedicine; Aarhus University; Aarhus; Denmark
| | - S. Thiel
- Department of Biomedicine; Aarhus University; Aarhus; Denmark
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Maier R, Heinson G, Thiel S, Selway K, Gill R, Scroggs M. A 3D lithospheric electrical resistivity model of the Gawler Craton, Southern Australia. ACTA ACUST UNITED AC 2013. [DOI: 10.1179/174327507x167037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Ostergaard JA, Bjerre M, Dagnaes-Hansen F, Hansen TK, Thiel S, Flyvbjerg A. Diabetes-induced changes in mannan-binding lectin levels and complement activation in a mouse model of type 1 diabetes. Scand J Immunol 2013; 77:187-94. [PMID: 23350935 DOI: 10.1111/sji.12027] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Accepted: 01/03/2013] [Indexed: 01/25/2023]
Abstract
Circulating mannan-binding lectin (MBL) levels are elevated in type 1 diabetes. Further, high MBL levels are associated with the development of diabetic nephropathy. In animals, a direct effect of MBL on diabetic kidney changes is observed. We hypothesized that MBL levels and detrimental complement activation increase as a consequence of diabetes. We measured plasma MBL before and 7 weeks after inducing diabetes by streptozotocin. Mice have two MBLs, MBL-A and MBL-C. Diabetes induction led to an increase in MBL-C concentration, whereas no change during the study was found in the control group. The increase in MBL-C was associated with the increasing plasma glucose levels. In accordance with the observed changes in circulating MBL levels, liver expression of Mbl2mRNA (encoding MBL-C) was increased in diabetes. Mbl1expression (encoding MBL-A) did not differ between diabetic and control animals. The estimated half-life of recombinant human MBL was significantly prolonged in mice with diabetes compared with control mice. Complement activation in plasma and glomeruli did not differ between groups. We demonstrate for the first time that MBL levels increase after induction of diabetes and in parallel with increasing plasma glucose. Our findings support the previous clinical observations of increased MBL in type 1 diabetes. This change may be explained by alternations in both MBL production and turnover.
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Affiliation(s)
- J A Ostergaard
- The Medical Research Laboratories, Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus C, Denmark.
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Thiel S, Bitzer S, Nierhaus T, Kalberlah C, Preusser S, Neumann J, Nikulin V, van der Meer E, Villringer A, Pleger B. Der Einfluss der Hysterese auf Entscheidungen bei taktiler Wahrnehmung. KLIN NEUROPHYSIOL 2013. [DOI: 10.1055/s-0033-1337267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Goltz D, Pleger B, Thiel S, Villringer A, Müller M. Andauernde räumliche Aufmerksamkeit auf vibrotaktile Stimulation im Flatterbereich moduliert die Aktivität des primären somatosensorischen Kortex. KLIN NEUROPHYSIOL 2013. [DOI: 10.1055/s-0033-1337202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Preusser S, Thiel S, Rook C, Blankenburg F, Driver J, Villringer A, Pleger B. Die Rolle des sekundär somatosensorischen Kortex in der Berührungsempfindung. KLIN NEUROPHYSIOL 2013. [DOI: 10.1055/s-0033-1337166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Thiel S, Jensen L, Degn SE, Nielsen HJ, Gál P, Dobó J, Jensenius JC. Mannan-binding lectin (MBL)-associated serine protease-1 (MASP-1), a serine protease associated with humoral pattern-recognition molecules: normal and acute-phase levels in serum and stoichiometry of lectin pathway components. Clin Exp Immunol 2012; 169:38-48. [PMID: 22670777 PMCID: PMC3390472 DOI: 10.1111/j.1365-2249.2012.04584.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [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] [Accepted: 03/01/2012] [Indexed: 11/27/2022] Open
Abstract
The pattern-recognition molecules mannan-binding lectin (MBL) and the three ficolins circulate in blood in complexes with MBL-associated serine proteases (MASPs). When MBL or ficolin recognizes a microorganism, activation of the MASPs occurs leading to activation of the complement system, an important component of the innate immune system. Three proteins are produced from the MASP1 gene: MASP-1 and MASP-3 and MAp44. We present an assay specific for MASP-1, which is based on inhibition of the binding of anti-MASP-1-specific antibody to MASP-1 domains coated onto microtitre wells. MASP-1 was found in serum in large complexes eluting in a position corresponding to ∼600 kDa after gel permeation chromatography in calcium-containing buffer and as monomers of ∼75 kDa in dissociating buffer. The concentration of MASP-1 in donor sera (n = 105) was distributed log-normally with a median value of 11 µg/ml (range 4-30 µg/ml). Serum and citrate plasma levels were similar, while the values in ethylenediamine tetraacetic acid plasma were slightly lower and in heparin plasma were 1·5 times higher than in serum. MASP-1 was present at adult level at 1 year of age, while it was 60% at birth. In normal healthy individuals the level of MASP-1 was stable throughout a 2-month period. After induction of an acute-phase reaction by operation we found an initial short decrease, concomitant with an increase in C-reactive protein levels, followed by an increase, doubling the MASP-1 concentration after 2 days. The present data prepare the ground for studies on the associations of MASP-1 levels with disease.
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Affiliation(s)
- S Thiel
- Department of Biomedicine, Aarhus University, Denmark.
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Ammitzboll CG, Thiel S, Ellingsen T, Deleuran B, Jorgensen A, Jensenius JC, Stengaard-Pedersen K. Levels of lectin pathway proteins in plasma and synovial fluid of rheumatoid arthritis and osteoarthritis. Rheumatol Int 2012; 32:1457-63. [PMID: 21461857 DOI: 10.1007/s00296-011-1879-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Accepted: 02/18/2011] [Indexed: 11/30/2022]
Abstract
The innate immune system contributes to the development of rheumatoid arthritis (RA). A potent contributor to such processes is the complement system. The complement system is known to be activated in the inflammatory phases of osteoarthritis (OA). The lectin pathway of the complement system is activated through the recognition of pathogens or altered self-structures by mannan-binding lectin (MBL) or one of the three ficolins in collaboration with MBL-associated serine proteases (MASPs). We assessed the lectin pathway in plasma and synovial fluid (SF) of 27 RA patients and 30 OA patients by measuring MBL, MASP-2, MASP-3, M-ficolin, and H-ficolin. The concentration for all 5 proteins was significantly higher in plasma than in SF (P < 0.001) and the concentration in paired plasma and SF samples correlated in both RA and OA (significance levels between <0.001 and 0.02). The ratio of SF/plasma concentration was for all proteins significantly elevated in RA compared with OA patients (all P < 0.001). The M-ficolin concentration correlated with the neutrophils in both plasma (P = 0.01) and SF (P < 0.001) of RA, and in plasma of 78 controls (P = 0.03). To our knowledge, this is the first report on these proteins in SF, except for MBL where our results are in contrast to the one previous publication. The results support an important physiological role of the neutrophils in determining the M-ficolin levels in both RA and healthy adults. We suggest that quantifications of white blood cells should be included in future clinical investigations of M-ficolin.
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Affiliation(s)
- C G Ammitzboll
- Department of Rheumatology, Aarhus University Hospital, Norrebrogade 44, 8000 Aarhus C, Denmark.
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Blum T, Schönfeld N, Kollmeier J, Ammenwerth W, Delis S, Grüning W, Nehls W, Thiel S, Bauer TT. [Rational tumour documentation and quality assurance to improve the standard of medical care for lung cancer patients]. Pneumologie 2012; 66:224-30. [PMID: 22477483 DOI: 10.1055/s-0032-1308902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The data on the quality of care of patients with lung cancer in Germany are insufficient. Although the National Lung Cancer Guideline from 2010 provides a good scientific basis for the management of the frequently complex pathways, no evidence exists showing how the relevant guideline recommendations are implemented nationwide or which treatment options generally are chosen in a tumour entity with one of the poorest prognoses. As part of the National Cancer Plan 2008, specific targets have been formulated for the systematic improvement of cancer care in Germany. As a main goal, the national re-organisation and harmonisation of tumor documentation and quality assurance are required for a sustainable improvement in the quality of care. This review article first describes the relevant terms and then examines how the specific targets of the National Cancer Plan have been implemented so far with regard to lung cancer care.
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Affiliation(s)
- T Blum
- Klinik für Pneumologie, Lungenklinik Heckeshorn, HELIOS Klinikum Emil von Behring, Walterhöferstrasse 11, Berlin.
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