1
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Aguilar R, Li X, Crowell CS, Burrell T, Vidal M, Rubio R, Jiménez A, Hernández-Luis P, Hofmann D, Mijočević H, Jeske S, Christa C, D'Ippolito E, Lingor P, Knolle PA, Roggendorf H, Priller A, Yazici S, Carolis C, Mayor A, Schreiner P, Poppert H, Beyer H, Schambeck SE, Izquierdo L, Tortajada M, Angulo A, Soutschek E, Engel P, Garcia-Basteiro A, Busch DH, Moncunill G, Protzer U, Dobaño C, Gerhard M. RBD-Based ELISA and Luminex Predict Anti-SARS-CoV-2 Surrogate-Neutralizing Activity in Two Longitudinal Cohorts of German and Spanish Health Care Workers. Microbiol Spectr 2023; 11:e0316522. [PMID: 36622140 PMCID: PMC9927417 DOI: 10.1128/spectrum.03165-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 12/04/2022] [Indexed: 01/10/2023] Open
Abstract
The ability of antibodies to neutralize severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is an important correlate of protection. For routine evaluation of protection, however, a simple and cost-efficient anti-SARS-CoV-2 serological assay predictive of serum neutralizing activity is needed. We analyzed clinical epidemiological data and blood samples from two cohorts of health care workers in Barcelona and Munich to compare several immunological readouts for evaluating antibody levels that could be surrogates of neutralizing activity. We measured IgG levels against SARS-CoV-2 spike protein (S), its S2 subunit, the S1 receptor binding domain (RBD), and the full length and C terminus of nucleocapsid (N) protein by Luminex, and against RBD by enzyme-linked immunosorbent assay (ELISA), and assessed those as predictors of plasma surrogate-neutralizing activity measured by a flow cytometry assay. In addition, we determined the clinical and demographic factors affecting plasma surrogate-neutralizing capacity. Both cohorts showed a high positive correlation between IgG levels to S antigen, especially to RBD, and the levels of plasma surrogate-neutralizing activity, suggesting RBD IgG as a good correlate of plasma neutralizing activity. Symptomatic infection, with symptoms such as loss of taste, dyspnea, rigors, fever and fatigue, was positively associated with anti-RBD IgG positivity by ELISA and Luminex, and with plasma surrogate-neutralizing activity. Our serological assays allow for the prediction of serum neutralization activity without the cost, hazards, time, and expertise needed for surrogate or conventional neutralization assays. Once a cutoff is established, these relatively simple high-throughput antibody assays will provide a fast and cost-effective method of assessing levels of protection from SARS-CoV-2 infection. IMPORTANCE Neutralizing antibody titers are the best correlate of protection against SARS-CoV-2. However, current tests to measure plasma or serum neutralizing activity do not allow high-throughput screening at the population level. Serological tests could be an alternative if they are proved to be good predictors of plasma neutralizing activity. In this study, we analyzed the SARS-CoV-2 serological profiles of two cohorts of health care workers by applying Luminex and ELISA in-house serological assays. Correlations of both serological tests were assessed between them and with a flow cytometry assay to determine plasma surrogate-neutralizing activity. Both assays showed a high positive correlation between IgG levels to S antigens, especially RBD, and the levels of plasma surrogate-neutralizing activity. This result suggests IgG to RBD as a good correlate of plasma surrogate-neutralizing activity and indicates that serology of IgG to RBD could be used to assess levels of protection from SARS-CoV-2 infection.
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Affiliation(s)
- Ruth Aguilar
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain
| | - Xue Li
- Institute of Medical Microbiology, Immunology, and Hygiene, School of Medicine, Technical University of Munich (TUM), Munich, Germany
| | - Claudia S. Crowell
- Institute of Medical Microbiology, Immunology, and Hygiene, School of Medicine, Technical University of Munich (TUM), Munich, Germany
| | - Teresa Burrell
- Institute of Medical Microbiology, Immunology, and Hygiene, School of Medicine, Technical University of Munich (TUM), Munich, Germany
| | - Marta Vidal
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain
| | - Rocio Rubio
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain
| | - Alfons Jiménez
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
| | - Pablo Hernández-Luis
- Immunology Unit, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universitat de Barcelona, Barcelona, Spain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Dieter Hofmann
- Institute of Virology, School of Medicine, Technical University of Munich, Munich, Germany
- German Center for Infection Research (DZIF), Munich, Germany
| | - Hrvoje Mijočević
- Institute of Virology, School of Medicine, Technical University of Munich, Munich, Germany
| | - Samuel Jeske
- Institute of Virology, School of Medicine, Technical University of Munich, Munich, Germany
| | - Catharina Christa
- Institute of Virology, School of Medicine, Technical University of Munich, Munich, Germany
| | - Elvira D'Ippolito
- Institute of Medical Microbiology, Immunology, and Hygiene, School of Medicine, Technical University of Munich (TUM), Munich, Germany
| | - Paul Lingor
- Klinikum rechts der Isar, Department of Neurology, School of Medicine, Technical University of Munich, Munich, Germany
| | - Percy A. Knolle
- German Center for Infection Research (DZIF), Munich, Germany
- Klinikum rechts der Isar, Institute of Molecular Immunology and Experimental Oncology, School of Medicine, Technical University of Munich, Munich, Germany
| | - Hedwig Roggendorf
- Klinikum rechts der Isar, Institute of Molecular Immunology and Experimental Oncology, School of Medicine, Technical University of Munich, Munich, Germany
| | - Alina Priller
- Klinikum rechts der Isar, Institute of Molecular Immunology and Experimental Oncology, School of Medicine, Technical University of Munich, Munich, Germany
| | - Sarah Yazici
- Klinikum rechts der Isar, Institute of Molecular Immunology and Experimental Oncology, School of Medicine, Technical University of Munich, Munich, Germany
| | - Carlo Carolis
- Biomolecular Screening and Protein Technologies Unit, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Alfredo Mayor
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain
| | | | | | | | - Sophia E. Schambeck
- Institute of Medical Microbiology, Immunology, and Hygiene, School of Medicine, Technical University of Munich (TUM), Munich, Germany
- Helios Klinikum München West, Munich, Germany
| | - Luis Izquierdo
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Barcelona, Spain
| | - Marta Tortajada
- Occupational Health Department, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
| | - Ana Angulo
- Immunology Unit, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universitat de Barcelona, Barcelona, Spain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | | | - Pablo Engel
- Immunology Unit, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universitat de Barcelona, Barcelona, Spain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Alberto Garcia-Basteiro
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Barcelona, Spain
- Department of Preventive Medicine and Epidemiology, Hospital Clinic, Universitat de Barcelona, Barcelona, Spain
| | - Dirk H. Busch
- Institute of Medical Microbiology, Immunology, and Hygiene, School of Medicine, Technical University of Munich (TUM), Munich, Germany
- German Center for Infection Research (DZIF), Munich, Germany
| | - Gemma Moncunill
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Barcelona, Spain
| | - Ulrike Protzer
- Institute of Virology, School of Medicine, Technical University of Munich, Munich, Germany
- German Center for Infection Research (DZIF), Munich, Germany
| | - Carlota Dobaño
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Barcelona, Spain
| | - Markus Gerhard
- Institute of Medical Microbiology, Immunology, and Hygiene, School of Medicine, Technical University of Munich (TUM), Munich, Germany
- German Center for Infection Research (DZIF), Munich, Germany
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2
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Beyer H, Lange N, Podtschaske AH, Martin J, Albers L, von Werder A, Ruland J, Schneider G, Meyer B, Kagerbauer SM, Gempt J. Anterior Pituitary Hormones in Blood and Cerebrospinal Fluid of Patients in Neurocritical Care. Endocrinology 2022; 18:71-79. [PMID: 35949361 PMCID: PMC9354947 DOI: 10.17925/ee.2022.18.1.71] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Accepted: 05/16/2022] [Indexed: 11/25/2022]
Abstract
Background: Anterior pituitary hormones in blood follow a circadian rhythm, which
may be influenced by various factors such as intracranial pathologies. In
cerebrospinal fluid (CSF), pituitary hormones have been collected only
selectively and circadian rhythm has not yet been investigated. This pilot study
analysed diurnal variations of anterior pituitary hormones in patients in
neurocritical care to determine whether circadian rhythmicity exists in these
patients. Possible influences of intracranial pathologies were also
investigated. Blood and CSF concentrations were assessed simultaneously to
explore the value of blood concentrations as a surrogate parameter for CSF
levels. Methods: Blood and CSF samples of 20 non-sedated patients were collected
at 06:00, noon, 18:00 and midnight, and analysed for adrenocorticotropic hormone
(ACTH), cortisol, thyroid-stimulating hormone (TSH) and insulin-like growth
factor-1 (IGF-1) concentrations at each of the four time points. ACTH and IGF-1
were measured by sandwich chemiluminescence immunoassay. Cortisol and TSH were
measured by electrochemiluminescence immunoassay. Results: Results showed
inconsistent circadian rhythms. Less than 50% of the patients showed a circadian
rhythmicity of ACTH, cortisol, TSH or IGF-1. Significance of diurnal variations
was only present for blood concentrations of TSH. Correlations between blood and
CSF concentrations were strong for cortisol and TSH. Conclusions: CSF
concentrations were only in the measurable range in some of the patients. No
clear circadian rhythmicity could be identified, except for TSH in blood.
Absence of significant diurnal variations could be explained by the underlying
pathologies or disturbing influences of the intensive care unit. Blood
concentrations of cortisol and TSH may be suitable surrogate parameters for
CSF.
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Affiliation(s)
- Henriette Beyer
- Department of Neurosurgery, Technical University Munich, School of
Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Nicole Lange
- Department of Neurosurgery, Technical University Munich, School of
Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Armin H Podtschaske
- Department of Anesthesiology, Technical University Munich, School of
Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Jan Martin
- Department of Anesthesiology, Technical University Munich, School of
Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Lucia Albers
- Department of Medical Informatics, Statistics and Epidemiology, Technical
University Munich, School of Medicine, Klinikum rechts der Isar Munich,
Germany
| | - Alexander von Werder
- Department of Neuroendocrinology, Technical University Munich, School of
Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Jürgen Ruland
- Department of Clinical Chemistry, Technical University Munich, School of
Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Gerhard Schneider
- Department of Anesthesiology, Technical University Munich, School of
Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Technical University Munich, School of
Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Simone M Kagerbauer
- Department of Anesthesiology, Technical University Munich, School of
Medicine, Klinikum rechts der Isar, Munich, Germany
| | - Jens Gempt
- Department of Neurosurgery, Technical University Munich, School of
Medicine, Klinikum rechts der Isar, Munich, Germany
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Wagner KI, Mateyka LM, Jarosch S, Grass V, Weber S, Schober K, Hammel M, Burrell T, Kalali B, Poppert H, Beyer H, Schambeck S, Holdenrieder S, Strötges-Achatz A, Haselmann V, Neumaier M, Erber J, Priller A, Yazici S, Roggendorf H, Odendahl M, Tonn T, Dick A, Witter K, Mijočević H, Protzer U, Knolle PA, Pichlmair A, Crowell CS, Gerhard M, D'Ippolito E, Busch DH. Recruitment of highly cytotoxic CD8 + T cell receptors in mild SARS-CoV-2 infection. Cell Rep 2021; 38:110214. [PMID: 34968416 PMCID: PMC8677487 DOI: 10.1016/j.celrep.2021.110214] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 11/07/2021] [Accepted: 12/13/2021] [Indexed: 01/12/2023] Open
Abstract
T cell immunity is crucial for control of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and has been studied widely on a quantitative level. However, the quality of responses, in particular of CD8+ T cells, has only been investigated marginally so far. Here, we isolate T cell receptor (TCR) repertoires specific for immunodominant SARS-CoV-2 epitopes restricted to common human Leukocyte antigen (HLA) class I molecules in convalescent individuals. SARS-CoV-2-specific CD8+ T cells are detected up to 12 months after infection. TCR repertoires are diverse, with heterogeneous functional avidity and cytotoxicity toward virus-infected cells, as demonstrated for TCR-engineered T cells. High TCR functionality correlates with gene signatures that, remarkably, could be retrieved for each epitope:HLA combination analyzed. Overall, our data demonstrate that polyclonal and highly functional CD8+ TCRs—classic features of protective immunity—are recruited upon mild SARS-CoV-2 infection, providing tools to assess the quality of and potentially restore functional CD8+ T cell immunity.
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Affiliation(s)
- Karolin I Wagner
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Laura M Mateyka
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Sebastian Jarosch
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Vincent Grass
- Institute of Virology, School of Medicine, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Simone Weber
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Kilian Schober
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich (TUM), 81675 Munich, Germany; Mikrobiologisches Institut - Klinische Mikrobiologie, Immunologie und Hygiene, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Monika Hammel
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Teresa Burrell
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Behnam Kalali
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Holger Poppert
- Department of Neurology, Helios Klinikum München West, 81241 Munich, Germany; Neurologische Klinik, University Hospital Rechts der Isar, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Henriette Beyer
- Department of Neurology, Helios Klinikum München West, 81241 Munich, Germany
| | - Sophia Schambeck
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich (TUM), 81675 Munich, Germany; Department of Neurology, Helios Klinikum München West, 81241 Munich, Germany
| | - Stefan Holdenrieder
- Institute of Laboratory Medicine, Munich Biomarker Research Center, Deutsches Herzzentrum München, Technical University of Munich (TUM), 80636 Munich, Germany
| | - Andrea Strötges-Achatz
- Institute of Laboratory Medicine, Munich Biomarker Research Center, Deutsches Herzzentrum München, Technical University of Munich (TUM), 80636 Munich, Germany
| | - Verena Haselmann
- Department of Clinical Chemistry, University Medicine Mannheim, Medical Faculty Mannheim of the University of Heidelberg, 68167 Mannheim, Germany
| | - Michael Neumaier
- Department of Clinical Chemistry, University Medicine Mannheim, Medical Faculty Mannheim of the University of Heidelberg, 68167 Mannheim, Germany
| | - Johanna Erber
- Department of Internal Medicine II, University Hospital rechts der Isar, Technical University of Munich, School of Medicine, Munich, Germany
| | - Alina Priller
- Institute of Molecular Immunology and Experimental Oncology, School of Medicine, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Sarah Yazici
- Institute of Molecular Immunology and Experimental Oncology, School of Medicine, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Hedwig Roggendorf
- Institute of Molecular Immunology and Experimental Oncology, School of Medicine, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Marcus Odendahl
- Experimental Transfusion Medicine, Medical Faculty Carl Gustav Carus, TU Dresden, 01307 Dresden, Germany; Institute for Transfusion Medicine Dresden, German Red Cross Blood Donation Service North-East, 01307 Dresden, Germany
| | - Torsten Tonn
- Experimental Transfusion Medicine, Medical Faculty Carl Gustav Carus, TU Dresden, 01307 Dresden, Germany; Institute for Transfusion Medicine Dresden, German Red Cross Blood Donation Service North-East, 01307 Dresden, Germany
| | - Andrea Dick
- Laboratory of Immunogenetics and Molecular Diagnostics, Department of Transfusion Medicine, Cellular Therapeutics and Hemostaseology, LMU University Hospital, 81377 Munich, Germany
| | - Klaus Witter
- Laboratory of Immunogenetics and Molecular Diagnostics, Department of Transfusion Medicine, Cellular Therapeutics and Hemostaseology, LMU University Hospital, 81377 Munich, Germany
| | - Hrvoje Mijočević
- Institute of Virology, School of Medicine, Technical University of Munich (TUM), 81675 Munich, Germany
| | - Ulrike Protzer
- Institute of Virology, School of Medicine, Technical University of Munich (TUM), 81675 Munich, Germany; German Center for Infection Research (DZIF), Partner Site Munich, Munich, Germany
| | - Percy A Knolle
- Institute of Molecular Immunology and Experimental Oncology, School of Medicine, Technical University of Munich (TUM), 81675 Munich, Germany; German Center for Infection Research (DZIF), Partner Site Munich, Munich, Germany
| | - Andreas Pichlmair
- Institute of Virology, School of Medicine, Technical University of Munich (TUM), 81675 Munich, Germany; German Center for Infection Research (DZIF), Partner Site Munich, Munich, Germany
| | - Claudia S Crowell
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich (TUM), 81675 Munich, Germany; German Center for Infection Research (DZIF), Partner Site Munich, Munich, Germany
| | - Markus Gerhard
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich (TUM), 81675 Munich, Germany; German Center for Infection Research (DZIF), Partner Site Munich, Munich, Germany
| | - Elvira D'Ippolito
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich (TUM), 81675 Munich, Germany.
| | - Dirk H Busch
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich (TUM), 81675 Munich, Germany; German Center for Infection Research (DZIF), Partner Site Munich, Munich, Germany.
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4
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Schambeck SE, Crowell CS, Wagner KI, D’Ippolito E, Burrell T, Mijočević H, Protzer U, Busch DH, Gerhard M, Poppert H, Beyer H. Phantosmia, Parosmia, and Dysgeusia Are Prolonged and Late-Onset Symptoms of COVID-19. J Clin Med 2021; 10:jcm10225266. [PMID: 34830550 PMCID: PMC8618742 DOI: 10.3390/jcm10225266] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 11/09/2021] [Accepted: 11/09/2021] [Indexed: 12/28/2022] Open
Abstract
Deficiencies in smell and taste are common symptoms of COVID-19. Quantitative losses are well surveyed. This study focuses on qualitative changes such as phantosmia (hallucination of smell), parosmia (alteration of smell), and dysgeusia (alteration of taste) and possible connections with the adaptive immune system. Subjective experience of deficiency in taste and smell was assessed by two different questionnaires after a median of 100 and 244 days after first positive RT-PCR test. SARS-CoV-2-specific antibody levels were measured with the iFlash-SARS-CoV-2 assay. After 100 days a psychophysical screening test for olfactory and gustatory dysfunction was administered. 30 of 44 (68.2%) participants reported a chemosensory dysfunction (14 quantitative, 6 qualitative, 10 quantitative, and qualitative) during COVID-19, eleven (25.0%) participants (1 quantitative, 7 qualitative, 3 quantitative, and quantity) after 100 days, and 14 (31.8%) participants (1 quantitative, 10 qualitative, 3 quantitative and qualitative) after 244 days. Four (9.1%) participants, who were symptom-free after 100 days reported now recently arisen qualitative changes. Serological and T-cell analysis showed no correlation with impairment of taste and smell. In conclusion, qualitative changes can persist for several months and occur as late-onset symptoms months after full recovery from COVID-19-induced quantitative losses in taste and smell.
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Affiliation(s)
- Sophia E. Schambeck
- Helios Klinikum München West, Steinerweg 5, 81241 München, Germany; (H.P.); (H.B.)
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich, Trogerstr. 30, 81675 München, Germany; (C.S.C.); (K.I.W.); (E.D.); (T.B.); (D.H.B.); (M.G.)
- Correspondence:
| | - Claudia S. Crowell
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich, Trogerstr. 30, 81675 München, Germany; (C.S.C.); (K.I.W.); (E.D.); (T.B.); (D.H.B.); (M.G.)
- German Center for Infection Research (DZIF), Partner Site Munich, 81675 Munich, Germany;
| | - Karolin I. Wagner
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich, Trogerstr. 30, 81675 München, Germany; (C.S.C.); (K.I.W.); (E.D.); (T.B.); (D.H.B.); (M.G.)
| | - Elvira D’Ippolito
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich, Trogerstr. 30, 81675 München, Germany; (C.S.C.); (K.I.W.); (E.D.); (T.B.); (D.H.B.); (M.G.)
| | - Teresa Burrell
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich, Trogerstr. 30, 81675 München, Germany; (C.S.C.); (K.I.W.); (E.D.); (T.B.); (D.H.B.); (M.G.)
| | - Hrvoje Mijočević
- Institute of Virology, School of Medicine, Technical University of Munich, Trogerstr. 30, 81675 München, Germany;
| | - Ulrike Protzer
- German Center for Infection Research (DZIF), Partner Site Munich, 81675 Munich, Germany;
- Institute of Virology, School of Medicine, Technical University of Munich, Trogerstr. 30, 81675 München, Germany;
| | - Dirk H. Busch
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich, Trogerstr. 30, 81675 München, Germany; (C.S.C.); (K.I.W.); (E.D.); (T.B.); (D.H.B.); (M.G.)
- German Center for Infection Research (DZIF), Partner Site Munich, 81675 Munich, Germany;
| | - Markus Gerhard
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University of Munich, Trogerstr. 30, 81675 München, Germany; (C.S.C.); (K.I.W.); (E.D.); (T.B.); (D.H.B.); (M.G.)
- German Center for Infection Research (DZIF), Partner Site Munich, 81675 Munich, Germany;
| | - Holger Poppert
- Helios Klinikum München West, Steinerweg 5, 81241 München, Germany; (H.P.); (H.B.)
- Klinik und Poliklinik für Neurologie im Neuro-Kopf-Zentrum, Klinikum Rechts der Isar, Ismaninger Str. 22, 81675 München, Germany
| | - Henriette Beyer
- Helios Klinikum München West, Steinerweg 5, 81241 München, Germany; (H.P.); (H.B.)
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5
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Beyer H, Rohde G, Grubišić Čabo A, Stange A, Jacobsen T, Bignardi L, Lizzit D, Lacovig P, Sanders CE, Lizzit S, Rossnagel K, Hofmann P, Bauer M. 80% Valley Polarization of Free Carriers in Singly Oriented Single-Layer WS_{2} on Au(111). Phys Rev Lett 2019; 123:236802. [PMID: 31868459 DOI: 10.1103/physrevlett.123.236802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Indexed: 06/10/2023]
Abstract
We employ time- and angle-resolved photoemission spectroscopy to study the spin- and valley-selective photoexcitation and dynamics of free carriers at the K[over ¯] and K[over ¯]^{'} points in singly oriented single-layer WS_{2}/Au(111). Our results reveal that in the valence band maximum an ultimate valley polarization of free holes of 84% can be achieved upon excitation with circularly polarized light at room temperature. Notably, we observe a significantly smaller valley polarization for the photoexcited free electrons in the conduction band minimum. Clear differences in the carrier dynamics between electrons and holes imply intervalley scattering processes into dark states being responsible for the efficient depolarization of the excited electron population.
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Affiliation(s)
- H Beyer
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - G Rohde
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - A Grubišić Čabo
- Department of Physics and Astronomy, Interdisciplinary Nanoscience Center, Aarhus University, 8000 Aarhus C, Denmark
| | - A Stange
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - T Jacobsen
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - L Bignardi
- Department of Physics, University of Trieste, 34127 Trieste, Italy
- Elettra-Sincrotrone Trieste S.C.p.A., 34149 Trieste, Italy
| | - D Lizzit
- Elettra-Sincrotrone Trieste S.C.p.A., 34149 Trieste, Italy
| | - P Lacovig
- Elettra-Sincrotrone Trieste S.C.p.A., 34149 Trieste, Italy
| | - C E Sanders
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell OX11 0QX, United Kingdom
| | - S Lizzit
- Elettra-Sincrotrone Trieste S.C.p.A., 34149 Trieste, Italy
| | - K Rossnagel
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
- Ruprecht-Haensel-Labor, Christian-Albrechts-Universität zu Kiel und Deutsches Elektronen-Synchrotron DESY, 24098 Kiel und 22607 Hamburg, Germany
- Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
| | - P Hofmann
- Department of Physics and Astronomy, Interdisciplinary Nanoscience Center, Aarhus University, 8000 Aarhus C, Denmark
| | - M Bauer
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
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Beyer H, Gempt J. Hypophysenstörungen nach Schädel-Hirn-Trauma bei Erwachsenen. Notf Rett Med 2019. [DOI: 10.1007/s10049-018-0491-y] [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: 10/28/2022]
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Tashenov S, Banaś D, Beyer H, Brandau C, Fritzsche S, Gumberidze A, Hagmann S, Hillenbrand PM, Jörg H, Kojouharov I, Kozhuharov C, Lestinsky M, Litvinov YA, Maiorova AV, Schaffner H, Shabaev VM, Spillmann U, Stöhlker T, Surzhykov A, Trotsenko S. Observation of coherence in the time-reversed relativistic photoelectric effect. Phys Rev Lett 2014; 113:113001. [PMID: 25259973 DOI: 10.1103/physrevlett.113.113001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Indexed: 06/03/2023]
Abstract
The photoelectric effect has been studied in the regime of hard x rays and strong Coulomb fields via its time-reversed process of radiative recombination (RR). In the experiment, the relativistic electrons recombined into the 2p_{3/2} excited state of hydrogenlike uranium ions, and both the RR x rays and the subsequently emitted characteristic x rays were detected in coincidence. This allowed us to observe the coherence between the magnetic substates in a highly charged ion and to identify the contribution of the spin-orbit interaction to the RR process.
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Affiliation(s)
- S Tashenov
- Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany
| | - D Banaś
- Institute of Physics, Jan Kochanowski University, 25-406 Kielce, Poland
| | - H Beyer
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - C Brandau
- ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany and FIAS Frankfurt Institute for Advanced Studies, 60438 Frankfurt am Main, Germany
| | - S Fritzsche
- Helmholtz-Institut Jena, 07743 Jena, Germany and Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | - A Gumberidze
- ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany and FIAS Frankfurt Institute for Advanced Studies, 60438 Frankfurt am Main, Germany
| | - S Hagmann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - P-M Hillenbrand
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - H Jörg
- Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany
| | - I Kojouharov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Ch Kozhuharov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - M Lestinsky
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Yu A Litvinov
- Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany and GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - A V Maiorova
- St. Petersburg State University, 198504 St. Petersburg, Russia
| | - H Schaffner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - V M Shabaev
- St. Petersburg State University, 198504 St. Petersburg, Russia
| | - U Spillmann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Th Stöhlker
- Helmholtz-Institut Jena, 07743 Jena, Germany and Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | - A Surzhykov
- Helmholtz-Institut Jena, 07743 Jena, Germany
| | - S Trotsenko
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany and Helmholtz-Institut Jena, 07743 Jena, Germany
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9
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Affiliation(s)
- A. Müller
- Anorganisch-Chemisches Institut der Universität Göttingen
| | - B. Krebs
- Anorganisch-Chemisches Institut der Universität Göttingen
| | - H. Beyer
- Anorganisch-Chemisches Institut der Universität Göttingen
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Krebs B, Beyer H. Notizen: Kristall- und Molekülstruktur des dimeren Thiophosgens. Zur Bildung und zur Struktur von 2.2-Dichloro-1.3-dithiacyclobutanon-(4). ACTA ACUST UNITED AC 2014. [DOI: 10.1515/znb-1968-0533] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- B. Krebs
- Anorganisch-Chemisches Institut der Universität Göttingen
| | - H. Beyer
- Anorganisch-Chemisches Institut der Universität Göttingen
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Gumberidze A, Thorn DB, Fontes CJ, Najjari B, Zhang HL, Surzhykov A, Voitkiv A, Fritzsche S, Banaś D, Beyer H, Chen W, DuBois RD, Geyer S, Grisenti RE, Hagmann S, Hegewald M, Hess S, Kozhuharov C, Märtin R, Orban I, Petridis N, Reuschl R, Simon A, Spillmann U, Trassinelli M, Trotsenko S, Weber G, Winters DFA, Winters N, Yu D, Stöhlker T. Electron- and proton-impact excitation of hydrogenlike uranium in relativistic collisions. Phys Rev Lett 2013; 110:213201. [PMID: 23745869 DOI: 10.1103/physrevlett.110.213201] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Indexed: 06/02/2023]
Abstract
The K shell excitation of H-like uranium (U(91+)) in relativistic collisions with different gaseous targets has been studied at the experimental storage ring at GSI Darmstadt. By performing measurements with different targets as well as with different collision energies, we were able to observe for the first time the effect of electron-impact excitation (EIE) process in the heaviest hydrogenlike ion. The large fine-structure splitting in H-like uranium allowed us to unambiguously resolve excitation into different L shell levels. State-of-the-art calculations performed within the relativistic framework which include excitation mechanisms due to both protons (nucleus) and electrons are in good agreement with the experimental findings. Moreover, our experimental data clearly demonstrate the importance of including the generalized Breit interaction in the treatment of the EIE process.
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Affiliation(s)
- A Gumberidze
- ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
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Beyer H, Meini S, Tsiouvaras N, Piana M, Gasteiger HA. Thermal and electrochemical decomposition of lithium peroxide in non-catalyzed carbon cathodes for Li–air batteries. Phys Chem Chem Phys 2013; 15:11025-37. [DOI: 10.1039/c3cp51056e] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Beyer H, Felden I, Heinzel A, Steffen M, Dittmeyer R, Straczewski G, Thormann J, Melin T, Völler-Blumenroth J, Wessling M. Entwicklung eines GtL-Dampfreformers mit Metallmembran für die Kombination mit einer PEM-Brennstoffzelle in APU-Anwendungen. CHEM-ING-TECH 2012. [DOI: 10.1002/cite.201250177] [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: 11/05/2022]
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Beyer H, Hetzheim A. Über die Umlagerung von 2-Amino-3-phenacyl-1,3,4-oxadiazolium-halogeniden in 1-Acylamino-4-aryl-imidazol-2-one. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/zfch.19620020509] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Beyer H, Völcker CE. Über die Synthese neuer heterocyclischer Ringsysteme, der Pyridazino[3,2-b]chinazolone und Phthalazino[1,2-b]chinazolone. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/zfch.19610010721] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Beyer H, Hetzheim A. Imidazo [2,1-b] [1,3,4] oxadiazol und Imidazo[2,1-b] [1,3,4]oxadiazin, zwei neue heterocyclische Ringsysteme. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/zfch.19620020510] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Grytsenko K, Kolomzarov Y, Lytvyn O, Strelchuk V, Ksianzou V, Schrader S, Beyer H, Servet B, Enouz-Vedrenne S, Garry G, Schulze RD, Friedrich J. Metal-Filled Polytetrafluoroethylene Nanostructered Thin Film. ACTA ACUST UNITED AC 2010. [DOI: 10.1166/asl.2010.1127] [Citation(s) in RCA: 2] [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: 11/23/2022]
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Passow A, Beyer H. In Memorian. Acta Otolaryngol 2009. [DOI: 10.3109/00016482609137553] [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]
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Spillmann U, Bräuning H, Hess S, Beyer H, Stöhlker T, Dousse JC, Protic D, Krings T. Performance of a Ge-microstrip imaging detector and polarimeter. Rev Sci Instrum 2008; 79:083101. [PMID: 19044330 DOI: 10.1063/1.2963046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Using 98% linearly polarized radiation at the European Synchrotron Radiation Facility in Grenoble, the performance of a prototype two-dimensional microstrip Ge(i) detector for x-ray imaging and as a Compton polarimeter has been evaluated. Using the energy and position sensitivity of the detector, the ability to obtain a complete reconstruction of the Compton event has been demonstrated. The modulation coefficient of the polarimeter is in good agreement with the theoretical limit of a perfect detector.
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Affiliation(s)
- U Spillmann
- 1Gesellschaft für Schwerionenforschung mbH, Planckstr. 1, 64291 Darmstadt, Germany
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Pyl T, Scheel KH, Beyer H. Über die Umsetzung von p-Hydroxy- und p-Alkoxy-phenylhydrazin mit Isothiocyansäure und Senfölen. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/prac.19630200507] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Profft E, Schneider F, Beyer H. Über Picoline. I. Über einige Derivate des Pyridin-2-aldehyds und der Pyridin-2-carbonsäure. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/prac.19550020303] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Herman RG, Lunsford JH, Beyer H, Jacobs PA, Uytterhoeven JB. Redox behavior of transition metal ions in zeolites. I. Reversibility of the hydrogen reduction of copper Y zeolites. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100589a009] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kussmaul K, Föhl J, Beyer H. Fracture mechanics concepts for evaluation of irradiated reactor pressure vessel material behavior. Nuclear Engineering and Design 1999. [DOI: 10.1016/s0029-5493(98)00314-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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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31
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Frystyk J, Skjaerbaek C, Alexander N, Emanuelsson H, Suryapranata H, Beyer H, Foegh M, Orskov H. Lanreotide reduces serum free and total insulin-like growth factor-I after angioplasty. Circulation 1996; 94:2465-71. [PMID: 8921789 DOI: 10.1161/01.cir.94.10.2465] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Several experiments point to a participating role of insulin-like growth factor-I (IGF-I) in the vascular events leading to restenosis after percutaneous transluminal coronary angioplasty (PTCA). METHODS AND RESULTS We measured fasting serum total (extractable) IGF-I in 553 patients in a controlled clinical trial. Half of the patients received continuous subcutaneous infusion of the somatostatin analogue lanreotide from the day before (baseline) and for 4 days after PTCA. We also measured ultrafiltrated serum free IGF-I and IGF-II, total IGF-II, IGF-binding protein-1 (IGFBP-1), IGFBP-3, and insulin in a subgroup of 18 placebo-treated and 20 lanreotide-treated patients. Total IGF-I had decreased by 7% (P < .0001) 1 day after initiation of lanreotide infusion and stayed reduced, whereas no early changes occurred in placebo-treated patients. The same pattern was observed in the subgroup. Free IGF-I decreased significantly from baseline by 22% to 27% (P < .05) in lanreotide-treated patients and increased insignificantly by 10% to 30% (P = .054) in placebo-treated patients. IGFBP-1 increased (P < .05) in both groups postoperatively, but levels in lanreotide-treated patients exceeded (P < .05) those of placebo-treated patients. Lanreotide treatment resulted in minor reductions (P < .05) in free and total IGF-II and IGFBP-3, whereas insulin was unaltered. CONCLUSIONS Lanreotide administration acutely decreases circulating total and free IGF-I, the latter relatively more, and increases IGFBP-1. These alterations in the IGF system may participate in the improvement of the long-term outcome after PTCA noted with lanreotide treatment.
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Affiliation(s)
- J Frystyk
- Institute of Experimental Clinical Research, Aarhus (Denmark) University Hospital, Denmark
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Rebentisch G, Pusinelli WD, Muche J, Beyer H. [Computerized diagnostic interpretation of quantitative x-ray diffraction analysis of urinary calculi]. Eur J Clin Chem Clin Biochem 1992; 30:95-100. [PMID: 1581415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The computerized investigation of the results of urinary calculus analysis, using the program UROQUANT, can be supplemented by using a PC program to analyse 10 typical constellations of results. Dietary and therapeutic measures, as well as further laboratory diagnostic procedures are produced in verbal form.
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Affiliation(s)
- G Rebentisch
- Institut für Klinische Chemie und Labordiagnostik, Carl-Thiem-Klinikums Cottbus
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Roth N, Beyreiss J, Schlenzka K, Beyer H. Coincidence of attention deficit disorder and atopic disorders in children: empirical findings and hypothetical background. J Abnorm Child Psychol 1991; 19:1-13. [PMID: 2030244 DOI: 10.1007/bf00910561] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
ADDH children are often reported to display signs of allergies to various substances and/or atopic (AT) symptoms (i.e., atopic eczema, hay fever, or asthma). Since, at least for a subgroup of these children, a common biological background for both ADD and atopy may be assumed that may involve brain catecholamines, our hypothesis was that in a group of AT children (mainly atopic eczema) signs of ADD should appear more often than in controls. Parental hyperactivity ratings revealed a significantly higher frequency of ADD symptoms in the AT group, and laboratory tests sensitive to attentional capacity and inhibitory functions showed poorer performance in the AT children, the findings being similar to those reported in hyperactives. Thus, our results add support to the assumption of a common predisposing factor for both AT and ADDH in a subgroup of children.
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Affiliation(s)
- N Roth
- Institute of Neurobiology, Magdeburg, Germany
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35
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Siewert B, Schellenberg R, Knorr W, Kropf S, Beyer H, Schindler M, Schwarz A. [Left hemispheric site of EEG findings in patients with schizophrenic psychoses]. Fortschr Neurol Psychiatr 1990; 58:455-9. [PMID: 2086430 DOI: 10.1055/s-2007-1001209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
It was the aim of our study to examine the interhemispherical and extrahemispherical integration that is possibly disturbed in patients suffering from schizophrenic psychoses, using an easy method of EEG performance spectral analysis. For this purpose, the EEG at rest and the functional EEG were determined in 69 schizophrenic patients (ICD) and 22 healthy subjects and the EEG reactivity was calculated. Differences especially in alpha-2 reactivity were seen both intrahemispherically and interhemispherically. This supports the concept of left hemispheric dysfunction in patients suffering from schizophrenic psychoses.
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Affiliation(s)
- B Siewert
- Medizinische Akademie Magdeburg, Arbeitsbereich Pathophysiologie des Institutes für Pathologische Biochemie
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Schellenberg R, Knorr W, Beyer H, Kropf S, Schindler M, Bölsche F, Belicke B, Kondratjuk G. Multivariate EEG power spectral analysis in acute schizophrenics. Int J Psychophysiol 1989; 8:85-91. [PMID: 2584086 DOI: 10.1016/0167-8760(89)90022-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The electroencephalogram (EEG) during information processing is influenced by specific changes in brain electrical activity. Based on the theory of disturbed information processing in schizophrenics, we analysed auditory stimulus induced EEG changes by Fast Fourier Transformation. The most important of the significant stimulation-dependent EEG power changes were measured in the 0.5-3.5 Hz and 10-13.5 Hz frequency bands in the left frontoparietal lead. In a multivariate analysis the separation of the subjects examined into acute schizophrenics and normals was incorrect in only 21% of the cases (resubstitution rate); using pi-method an error of 31% was estimated.
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Affiliation(s)
- R Schellenberg
- Department of Pathophysiology, Medical Academy of Magdeburg, G.D.R
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Schellenberg R, Knorr W, Beyer H, Kropf S, Schindler M, Bölsche F, Kondratjuk G. Repeated acoustic stimulation of acute schizophrenic patients and the habituation of EEG power changes. Int J Psychophysiol 1989; 7:55-63. [PMID: 2925465 DOI: 10.1016/0167-8760(89)90031-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Habituation in psychiatric patients to repeated stimuli has typically been described in connection with the measurement of the skin conductance orienting response. Here EEG power spectra of acute schizophrenic patients and normals to 4 trials of an acoustic stimulation were examined for evidence of habituation. In response to stimulation the alpha EEG reactivity was less distinct in schizophrenics than in normals. This is in agreement with the theory of hypovariability or hyperstability of the EEG in schizophrenics. Signs of habituation in acute schizophrenics were clearer in fast beta frequencies of the parietal leads.
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Affiliation(s)
- R Schellenberg
- Department of Pathophysiology, Medical Academy of Magdeburg, G.D.R
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Abstract
Extra proviral copies of mouse mammary tumor virus (MMTV) are known to be present in the genomes of certain T-cell lymphomas of mice. Analysis of additional non-mammary tumor cell types known to express MMTV transcripts and antigens revealed the presence of extra acquired MMTV proviruses in a pituitary tumor cell line, a macrophage line, and Leydig testicular tumor cells. The nature of the amplified MMTV proviruses in these various tumor cell types differed with regard to copy number and presence of alterations in the long terminal repeat region.
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Affiliation(s)
- J Racevskis
- Department of Oncology, Montefiore, Cancer Center, Bronx, New York
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40
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Schellenberg R, Knorr W, Beyer H, Kropf S, Schindler M, Bölsche F. [Multivariate discriminant analysis of EEG power spectra in acute schizophrenic patients and healthy probands]. Psychiatr Neurol Med Psychol (Leipz) 1988; 40:555-63. [PMID: 3237884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The electroencephalogram (EEG) during information processing is influenced by specific changes in brain electrical activity. Based on the theory of a disturbed information processing in schizophrenics we analysed auditory stimulus induced EEG changes by Fast Fourier Transformation. The most important of the significant stimulation dependent EEG power changes were measured in the 0.5-3.5 Hz and 10-13.5 Hz frequency bands in the left parietal lead. In a multivariate analysis the separation of the subjects examined into acute schizophrenics and normals was incorrect in only 21% of the cases (resubstitution rate): using the pi-method an error of 31% was estimated.
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Affiliation(s)
- R Schellenberg
- Instituts für Pathologische Biochemie Medizinischen Akademie Magdeburg
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Beyreiss J, Roth N, Beyer H, Kropf S, Shlenzka K, Schmidt A, Roscher G. Coincidence of immune (atopic dermatitis) and behavioral (attention deficit) disorders in children: empirical data. Act Nerv Super (Praha) 1988; 30:127-8. [PMID: 3421044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- J Beyreiss
- Clinic of Dermatology, MAM, Magdeburg, DDR
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42
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Roos E, Eisele U, Beyer H, Gillot R. Classification and characterization of materials by means of fracture mechanics parameters. Nuclear Engineering and Design 1987. [DOI: 10.1016/0029-5493(87)90192-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Seidel H, Beyer H, Bräuer D. Electromyographic evaluation of back muscle fatigue with repeated sustained contractions of different strengths. Eur J Appl Physiol Occup Physiol 1987; 56:592-602. [PMID: 2958278 DOI: 10.1007/bf00635375] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The aim of the study was to obtain information on changes in surface electromyograms from the lumbar erector spinae muscles during fatiguing isometric contractions. Four male subjects held different target extension forces to fatique in a prone position under carefully controlled biomechanical conditions. Standard deviations of the distribution of EMG amplitudes (RMS values), autoregressive (AR) time series models of the 15th order and spectral densities were computed. At lower force levels, i.e., at about 50 to 100 Nm or 20-40% of estimated maximum voluntary contraction force (MVC), RMS values significantly decreased over time; at the highest level examined (on average 162 Nm), they increased. Over all force levels, the explained variances of AR models increased and mean power frequencies (MPF) decreased with increasing force. The first and second AR coefficients also exhibited significant changes, depending on both contraction time and strength. The AR time series structure of EMGs during short isometric test contractions at the lowest force level within 30 s after the failure point clearly indicated muscle fatigue and some differences remained in their dependence on the preceding force. The results suggest a concept of 'selective fatigue', and provide a basis for refined electromyographic evaluation of back muscle fatigue. Such an evaluation has to consider the force history preceding the failure point, or serious errors become unavoidable. The increase in RMS values does not constitute a criterion of back muscle fatigue at low force levels. AR time series models are recommended for the description of fatigue-induced electromyographic changes.
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Affiliation(s)
- H Seidel
- Central Institute for Occupational Medicine of the GDR
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Lachhein L, Kielstein R, Rohmann EM, Beyer H. [Accelerating factors in the progression of chronic renal failure]. Z Urol Nephrol 1986; 79:647-53. [PMID: 3564721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A simple and reliable possibility to recognize at once sudden deteriorations of the renal function is the demonstration of IgKr accompanying the disease by means of semilogarithmic paper. Up to now probably no special importance has been attached to an intensive treatment of hypertension. The kinetics of the initial loss of function further remains unclear. The importance and possible influence on the accelerating factors must be defined exactly in a longer period of observation and with a greater number of patients. If we succeed in avoiding the acceleration and even in retarding the progression this would be connected with an essential delay of the time of the dependence upon dialysis for a number of patients.
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Holsboer F, Gerken A, von Bardeleben U, Grimm W, Beyer H, Müller OA, Stalla GK. Human corticotropin-releasing hormone in depression--correlation with thyrotropin secretion following thyrotropin-releasing hormone. Biol Psychiatry 1986; 21:601-11. [PMID: 3011129 DOI: 10.1016/0006-3223(86)90121-6] [Citation(s) in RCA: 97] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Twenty-two subjects (11 patients with major endogenous depression and 11 controls) received an intravenous test dose of 100 micrograms human corticotropin-releasing hormone (h-CRH). Corticotropin (ACTH), but not cortisol, responses were blunted in depressives. Basal cortisol secretion was higher in depressives than in controls and was negatively correlated to the corticotropin response following h-CRH. This finding indicates the integrity of the glucocorticoid-dependent negative feedback regulation in depression and supports the view that hypercortisolism in depression is primarily due to a suprapituitary disturbance. Comparison of ACTH responses after h-CRH with thyrotropin (TSH) output following thyrotropin-releasing hormone (TRH) revealed a positive correlation (r = 0.65, p less than 0.001). The concordance between ACTH and TSH responses after specific challenges suggests that regulation of both systems is at least in part under a common control.
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Lutze G, Schlote A, Beyer H, Kropf S. [Diagnosis of hemophilia and Willebrand-Jürgens syndrome. 2. Results of studies in hemophilia patients and hemophilia carriers]. Z Gesamte Inn Med 1985; 40:479-83. [PMID: 4060793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
By genealogic and laboratory-diagnostic investigations in the county of Magdeburg 79 patients with haemophilia A and 23 patients with haemophilia B were established. Characteristic coagulation-analytic findings in patients without and with additional thrombocytic functional disturbances are shown. In female conductors of haemophilia A the reliability in the diagnostics could be increased with the help of the discriminance analysis by combination of the genealogic tree information with the coagulation-analytic findings.
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Abstract
Eight healthy probands received 1.0 to 1.3 g ethanol per kg body weight within a period of 30 minutes. The average hourly elimination rate of ethanol during the postresorptive phase was found to be 0.18 g/l. No significant increase in the elimination rate was seen either after administration of 200 mg metoprolol per day in slow release form for a period of one week, or after a single dose of 200 mg metoprolol in standard formulation taken at the beginning of ethanol ingestion. On the other hand, long-term administration of metoprolol resulted in a steeper rise and a delayed decrease of blood alcohol concentration. Simultaneous intake of metoprolol and of alcohol in high dosage should be avoided.
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Rebentisch G, Beyer H. [Suggestion for the evaluation of roentgen diffractometric urinary calculus analysis results based on the 5th and 6th East German trial]. Z Urol Nephrol 1983; 76:303-9. [PMID: 6880418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The evaluation system suggested allows the results of urinary-calculi analysis centres to be compared after estimating the calculus stages present, the distinction between primary and secondary components and the deviation from normal composition. Afterwards the quality of the results of analysis of urinary calculi improved using the standard method.
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Höfs T, Beyer H, Kropf S. [Multivariate analysis of laboratory parameters in patients with true vitiligo]. Dermatol Monatsschr 1982; 168:746-52. [PMID: 7160506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Beyer H. Tukey, John W.: Exploratory Data Analysis. Addison-Wesley Publishing Company Reading, Mass. — Menlo Park, Cal., London, Amsterdam, Don Mills, Ontario, Sydney 1977, XVI, 688 S. Biom J 1981. [DOI: 10.1002/bimj.4710230408] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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