1
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Jaki L, Weigang S, Kern L, Kramme S, Wrobel AG, Grawitz AB, Nawrath P, Martin SR, Dähne T, Beer J, Disch M, Kolb P, Gutbrod L, Reuter S, Warnatz K, Schwemmle M, Gamblin SJ, Neumann-Haefelin E, Schnepf D, Welte T, Kochs G, Huzly D, Panning M, Fuchs J. Total escape of SARS-CoV-2 from dual monoclonal antibody therapy in an immunocompromised patient. Nat Commun 2023; 14:1999. [PMID: 37037847 PMCID: PMC10085998 DOI: 10.1038/s41467-023-37591-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 03/22/2023] [Indexed: 04/12/2023] Open
Abstract
Monoclonal antibodies (mAbs) directed against the spike of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are effective therapeutic options to combat infections in high-risk patients. Here, we report the adaptation of SARS-CoV-2 to the mAb cocktail REGN-COV in a kidney transplant patient with hypogammaglobulinemia. Following mAb treatment, the patient did not clear the infection. During viral persistence, SARS-CoV-2 acquired three novel spike mutations. Neutralization and mouse protection analyses demonstrate a complete viral escape from REGN-COV at the expense of ACE-2 binding. Final clearance of the virus occurred upon reduction of the immunosuppressive regimen and total IgG substitution. Serology suggests that the development of highly neutralizing IgM rather than IgG substitution aids clearance. Our findings emphasise that selection pressure by mAbs on SARS-CoV-2 can lead to development of escape variants in immunocompromised patients. Thus, modification of immunosuppressive therapy, if possible, might be preferable to control and clearance of the viral infection.
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Affiliation(s)
- Lena Jaki
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Sebastian Weigang
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Lisa Kern
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Stefanie Kramme
- Institute for Infection Prevention and Hospital Epidemiology, Freiburg University Medical Center, University of Freiburg, Freiburg, Germany
| | - Antoni G Wrobel
- The Structural Biology of Disease Processes Laboratory, The Francis Crick Institute, London, UK
| | - Andrea B Grawitz
- Institute for Clinical Chemistry and Laboratory Medicine, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Philipp Nawrath
- The Structural Biology of Disease Processes Laboratory, The Francis Crick Institute, London, UK
| | - Stephen R Martin
- The Structural Biology of Disease Processes Laboratory, The Francis Crick Institute, London, UK
| | - Theo Dähne
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Julius Beer
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Miriam Disch
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Philipp Kolb
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Lisa Gutbrod
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Sandra Reuter
- Institute for Infection Prevention and Hospital Epidemiology, Freiburg University Medical Center, University of Freiburg, Freiburg, Germany
| | - Klaus Warnatz
- Department of Rheumatology and Clinical Immunology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Center for Chronic Immunodeficiency (CCI), Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Martin Schwemmle
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Steven J Gamblin
- The Structural Biology of Disease Processes Laboratory, The Francis Crick Institute, London, UK
| | - Elke Neumann-Haefelin
- Renal Division, Department of Medicine, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Daniel Schnepf
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Thomas Welte
- Renal Division, Department of Medicine, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
| | - Georg Kochs
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Daniela Huzly
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Marcus Panning
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
| | - Jonas Fuchs
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
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2
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Beer J, Crotta S, Breithaupt A, Ohnemus A, Becker J, Sachs B, Kern L, Llorian M, Ebert N, Labroussaa F, Nhu Thao TT, Trueeb BS, Jores J, Thiel V, Beer M, Fuchs J, Kochs G, Wack A, Schwemmle M, Schnepf D. Impaired immune response drives age-dependent severity of COVID-19. J Exp Med 2022; 219:e20220621. [PMID: 36129445 PMCID: PMC9499827 DOI: 10.1084/jem.20220621] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 08/05/2022] [Accepted: 09/01/2022] [Indexed: 11/09/2022] Open
Abstract
Severity of COVID-19 shows an extraordinary correlation with increasing age. We generated a mouse model for severe COVID-19 and show that the age-dependent disease severity is caused by the disruption of a timely and well-coordinated innate and adaptive immune response due to impaired interferon (IFN) immunity. Aggravated disease in aged mice was characterized by a diminished IFN-γ response and excessive virus replication. Accordingly, adult IFN-γ receptor-deficient mice phenocopied the age-related disease severity, and supplementation of IFN-γ reversed the increased disease susceptibility of aged mice. Further, we show that therapeutic treatment with IFN-λ in adults and a combinatorial treatment with IFN-γ and IFN-λ in aged Ifnar1-/- mice was highly efficient in protecting against severe disease. Our findings provide an explanation for the age-dependent disease severity and clarify the nonredundant antiviral functions of type I, II, and III IFNs during SARS-CoV-2 infection in an age-dependent manner. Our data suggest that highly vulnerable individuals could benefit from immunotherapy combining IFN-γ and IFN-λ.
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Affiliation(s)
- Julius Beer
- Institute of Virology, Medical Center University of Freiburg, Freiburg, Germany
| | - Stefania Crotta
- Immunoregulation Laboratory, The Francis Crick Institute, London, UK
| | - Angele Breithaupt
- Department of Experimental Animal Facilities and Biorisk Management, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
| | - Annette Ohnemus
- Institute of Virology, Medical Center University of Freiburg, Freiburg, Germany
| | - Jan Becker
- Institute of Virology, Medical Center University of Freiburg, Freiburg, Germany
| | - Benedikt Sachs
- Institute of Virology, Medical Center University of Freiburg, Freiburg, Germany
| | - Lisa Kern
- Institute of Virology, Medical Center University of Freiburg, Freiburg, Germany
| | - Miriam Llorian
- Bioinformatics and Biostatistics, The Francis Crick Institute, London, UK
| | - Nadine Ebert
- Institute of Virology and Immunology, Bern, Switzerland
- Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Fabien Labroussaa
- Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Tran Thi Nhu Thao
- Institute of Virology and Immunology, Bern, Switzerland
- Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Graduate School for Biomedical Science, University of Bern, Bern, Switzerland
| | - Bettina Salome Trueeb
- Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Joerg Jores
- Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Volker Thiel
- Institute of Virology and Immunology, Bern, Switzerland
- Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Multidisciplinary Center for Infectious Diseases, University of Bern, Switzerland
| | - Martin Beer
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
| | - Jonas Fuchs
- Institute of Virology, Medical Center University of Freiburg, Freiburg, Germany
| | - Georg Kochs
- Institute of Virology, Medical Center University of Freiburg, Freiburg, Germany
| | - Andreas Wack
- Immunoregulation Laboratory, The Francis Crick Institute, London, UK
| | - Martin Schwemmle
- Institute of Virology, Medical Center University of Freiburg, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Daniel Schnepf
- Institute of Virology, Medical Center University of Freiburg, Freiburg, Germany
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3
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Böhm S, Böhm J, Gruber J, Kern L, McCallum J, McCallum L, McCarthy T, Quick J, Schartner M. Probing a southern hemisphere VLBI Intensive baseline configuration for UT1 determination. Earth Planets Space 2022; 74:118. [PMID: 35915663 PMCID: PMC9334372 DOI: 10.1186/s40623-022-01671-w] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
The deviation of Universal Time from atomic time, expressed as UT1-UTC, reflects the irregularities of the Earth rotation speed and is key to precise geodetic applications which depend on the transformation between celestial and terrestrial reference frames. A rapidly varying quantity such as UT1-UTC demands observation scenarios enabling fast delivery of good results. These criteria are currently met only by the Very Long Baseline Interferometry (VLBI) Intensive sessions. Due to stringent requirements of a fast UT1-UTC turnaround, the observations are limited to a few baselines and a duration of one hour. Hence, the estimation of UT1-UTC from Intensives is liable to constraints and prone to errors introduced by inaccurate a priori information. One aspect in this context is that the regularly operated Intensive VLBI sessions organised by the International VLBI Service for Geodesy and Astrometry solely use stations in the northern hemisphere. Any potential systematic errors due to this northern hemisphere dominated geometry are so far unknown. Besides the general need for stimulating global geodetic measurements with southern observatories, this served as a powerful motivation to launch the SI (Southern Intensive) program in 2020. The SI sessions are observed using three VLBI antennas in the southern hemisphere: Ht (South Africa), Hb (Tasmania) and Yg (Western Australia). On the basis of UT1-UTC results from 53 sessions observed throughout 2020 and 2021, we demonstrate the competitiveness of the SI with routinely operated Intensive sessions in terms of operations and UT1-UTC accuracy. The UT1-UTC values of the SI reach an average agreement of 32 µs in terms of weighted standard deviation when compared with the conventional Intensives results of five independent analysis centers and of 27 µs compared with the 14C04 series. The mean scatter of all solutions of the considered northern hemisphere Intensives with respect to C04 is at a comparable level of 29 µs. The quality of the results is only slightly degraded if just the baseline HtHb is evaluated. In combination with the e-transfer capabilities from Ht to Hb, this facilitates continuation of the SI by ensuring rapid service UT1-UTC provision.
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Affiliation(s)
- Sigrid Böhm
- Department of Geodesy and Geoinformation, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - Johannes Böhm
- Department of Geodesy and Geoinformation, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - Jakob Gruber
- Department of Geodesy and Geoinformation, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - Lisa Kern
- Department of Geodesy and Geoinformation, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | | | | | | | - Jonathan Quick
- Hartebeesthoek Radio Astronomy Observatory, Krugersdorp
, South Africa
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4
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Lang-Meli J, Fuchs J, Mathé P, Ho HE, Kern L, Jaki L, Rusignuolo G, Mertins S, Somogyi V, Neumann-Haefelin C, Trinkmann F, Müller M, Thimme R, Umhau M, Quinti I, Wagner D, Panning M, Cunningham-Rundles C, Laubner K, Warnatz K. Case Series: Convalescent Plasma Therapy for Patients with COVID-19 and Primary Antibody Deficiency. J Clin Immunol 2021; 42:253-265. [PMID: 34893946 PMCID: PMC8664001 DOI: 10.1007/s10875-021-01193-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 12/05/2021] [Indexed: 12/23/2022]
Abstract
Patients with primary antibody deficiency are at risk for severe and in many cases for prolonged COVID-19. Convalescent plasma treatment of immunocompromised individuals could be an option especially in countries with limited access to monoclonal antibody therapies. While studies in immunocompetent COVID19 patients have demonstrated only a limited benefit, evidence for the safety, timing, and effectiveness of this treatment in antibody-deficient patients is lacking. Here, we describe 16 cases with primary antibody deficiency treated with convalescent plasma in four medical centers. In our cohort, treatment was associated with a reduction in viral load and improvement of clinical symptoms, even when applied over a week after onset of infection. There were no relevant side effects besides a short-term fever reaction in one patient. Longitudinal full-genome sequencing revealed the emergence of mutations in the viral genome, potentially conferring an antibody escape in one patient with persistent viral RNA shedding upon plasma treatment. However, he resolved the infection after a second course of plasma treatment. Thus, our data suggest a therapeutic benefit of convalescent plasma treatment in patients with primary antibody deficiency even months after infection. While it appears to be safe, PCR follow-up for SARS-CoV-2 is advisable and early re-treatment might be considered in patients with persistent viral shedding.
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Affiliation(s)
- Julia Lang-Meli
- Department of Medicine II, Medical Center - University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Freiburg, Germany
| | - Jonas Fuchs
- Institute of Virology, University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Freiburg, Germany
| | - Philipp Mathé
- Division of Infectious Diseases, Department of Medicine II, Medical Center - University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Freiburg, Germany
| | - Hsi-En Ho
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Lisa Kern
- Institute of Virology, University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Freiburg, Germany
| | - Lena Jaki
- Institute of Virology, University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Freiburg, Germany
| | - Giuseppe Rusignuolo
- Department of Medicine II, Medical Center - University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Freiburg, Germany
| | - Susanne Mertins
- Division of Infectious Diseases, Department of Medicine II, Medical Center - University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Freiburg, Germany
| | - Vivien Somogyi
- Department of Pneumology and Critical Care Medicine, Thoraxklinik, University of Heidelberg, Translational Lung Research Enter Heidelberg, German Center for Lung Research, Heidelberg, Germany
| | - Christoph Neumann-Haefelin
- Department of Medicine II, Medical Center - University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Freiburg, Germany
| | - Frederik Trinkmann
- Department of Pneumology and Critical Care Medicine, Thoraxklinik, University of Heidelberg, Translational Lung Research Enter Heidelberg, German Center for Lung Research, Heidelberg, Germany
- Department of Biomedical Informatics at the Center for Preventive Medicine and Digital Health (CPD-BW), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Michael Müller
- Department of Pneumology and Critical Care Medicine, Thoraxklinik, University of Heidelberg, Translational Lung Research Enter Heidelberg, German Center for Lung Research, Heidelberg, Germany
| | - Robert Thimme
- Department of Medicine II, Medical Center - University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Freiburg, Germany
| | - Markus Umhau
- Institute for Transfusion Medicine and Gene Therapy, University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Freiburg, Germany
| | - Isabella Quinti
- Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Dirk Wagner
- Division of Infectious Diseases, Department of Medicine II, Medical Center - University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Freiburg, Germany
| | - Marcus Panning
- Institute of Virology, University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Freiburg, Germany
| | - Charlotte Cunningham-Rundles
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Katharina Laubner
- Department of Medicine II, Medical Center - University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Freiburg, Germany
| | - Klaus Warnatz
- Department of Rheumatology and Clinical Immunology, Medical Center - University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Breisacher Str. 115, 79106, Freiburg, Germany.
- Center for Chronic Immunodeficiency, Medical Center - University of Freiburg and Faculty of Medicine, University Hospital Freiburg, Freiburg, Germany.
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5
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Weigang S, Fuchs J, Zimmer G, Schnepf D, Kern L, Beer J, Luxenburger H, Ankerhold J, Falcone V, Kemming J, Hofmann M, Thimme R, Neumann-Haefelin C, Ulferts S, Grosse R, Hornuss D, Tanriver Y, Rieg S, Wagner D, Huzly D, Schwemmle M, Panning M, Kochs G. Within-host evolution of SARS-CoV-2 in an immunosuppressed COVID-19 patient as a source of immune escape variants. Nat Commun 2021; 12:6405. [PMID: 34737266 PMCID: PMC8568958 DOI: 10.1038/s41467-021-26602-3] [Citation(s) in RCA: 99] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 10/15/2021] [Indexed: 02/06/2023] Open
Abstract
The origin of SARS-CoV-2 variants of concern remains unclear. Here, we test whether intra-host virus evolution during persistent infections could be a contributing factor by characterizing the long-term SARS-CoV-2 infection dynamics in an immunosuppressed kidney transplant recipient. Applying RT-qPCR and next-generation sequencing (NGS) of sequential respiratory specimens, we identify several mutations in the viral genome late in infection. We demonstrate that a late viral isolate exhibiting genome mutations similar to those found in variants of concern first identified in UK, South Africa, and Brazil, can escape neutralization by COVID-19 antisera. Moreover, infection of susceptible mice with this patient’s escape variant elicits protective immunity against re-infection with either the parental virus and the escape variant, as well as high neutralization titers against the alpha and beta SARS-CoV-2 variants, B.1.1.7 and B.1.351, demonstrating a considerable immune control against such variants of concern. Upon lowering immunosuppressive treatment, the patient generated spike-specific neutralizing antibodies and resolved the infection. Our results suggest that immunocompromised patients could be a source for the emergence of potentially harmful SARS-CoV-2 variants. Here, in a longitudinal case study, Weigang et al. demonstrate that evolution of SARS-CoV-2 within a persistently infected immunosuppressed patient can result in the emergence of novel variants with reduced sensitivity to antibody neutralization.
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Affiliation(s)
- Sebastian Weigang
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Jonas Fuchs
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Gert Zimmer
- Institute of Virology and Immunology, Bern & Mittelhäusern, Switzerland, and Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Daniel Schnepf
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Lisa Kern
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Julius Beer
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Hendrik Luxenburger
- Department of Medicine II, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Jakob Ankerhold
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Valeria Falcone
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Janine Kemming
- Department of Medicine II, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Maike Hofmann
- Department of Medicine II, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Robert Thimme
- Department of Medicine II, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Christoph Neumann-Haefelin
- Department of Medicine II, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Svenja Ulferts
- Institute of Experimental and Clinical Pharmacology and Toxicology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Robert Grosse
- Institute of Experimental and Clinical Pharmacology and Toxicology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Daniel Hornuss
- Division of Infectious Diseases, Dept. Med. II, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Yakup Tanriver
- Division of Nephrology, Dept. Med. IV, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Siegbert Rieg
- Division of Infectious Diseases, Dept. Med. II, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Dirk Wagner
- Division of Infectious Diseases, Dept. Med. II, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Daniela Huzly
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Martin Schwemmle
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Marcus Panning
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
| | - Georg Kochs
- Institute of Virology, Freiburg University Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
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6
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Timmins L, Kern L, Ghosh A, Urato C, Rich E. Predicting Fragmented Care: Beneficiary, Primary Care Physician, and Practice Characteristics. Health Serv Res 2021. [DOI: 10.1111/1475-6773.13782] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Affiliation(s)
| | - Lisa Kern
- Weill Cornell Medicine New York New York USA
| | | | - Carol Urato
- Mathematica Washington District of Columbia USA
| | - Eugene Rich
- Mathematica Washington District of Columbia USA
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7
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Schartner M, Kern L, Nothnagel A, Böhm J, Soja B. Optimal VLBI baseline geometry for UT1-UTC Intensive observations. J Geod 2021; 95:75. [PMID: 34720450 PMCID: PMC8550500 DOI: 10.1007/s00190-021-01530-8] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 06/03/2021] [Indexed: 06/13/2023]
Abstract
One of the main tasks of Very Long Baseline Interferometry (VLBI) is the rapid determination of the highly variable Earth's rotation expressed through the difference between Universal Time UT1 and Coordinated Universal Time UTC (dUT1). For this reason, dedicated one hour, single baseline sessions, called "Intensives", are observed on a daily basis. Thus far, the optimal geometry of Intensive sessions was understood to include a long east-west extension of the baseline to ensure a dUT1 estimation with highest accuracy. In this publication, we prove that long east-west baselines are the best choice only for certain lengths and orientations. In this respect, optimal orientations may even require significant inclination of the baseline with respect to the equatorial plane. The basis of these findings is a simulation study with subsequent investigations in the partial derivatives of the observed group delays τ with respect to dUT1 ∂ τ / ∂ d U T 1 . Almost 3000 baselines between artificial stations located on a regular 10 × 10 degree grid are investigated to derive a global and generally valid picture about the best length and orientation of Intensive baselines. Our results reveal that especially equatorial baselines or baselines with a center close to the equatorial plane are not suited for Intensives although they provide a good east-west extension. This is explained by the narrow right ascension band of visible sources and the resulting lack of variety in the partial derivatives. Moreover, it is shown that north-south baselines are also capable of determining dUT1 with reasonable accuracy, given that the baseline orientation is significantly different from the Earth rotation axis. However, great care must be taken to provide accurate polar motion a priori information for these baselines. Finally, we provide a better metric to assess the suitability of Intensive baselines based on the effective spread of ∂ τ / ∂ d U T 1 .
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Affiliation(s)
| | - Lisa Kern
- TU Wien, Wiedner Hauptstrasse 8, A-1040 Wien, Austria
| | | | - Johannes Böhm
- TU Wien, Wiedner Hauptstrasse 8, A-1040 Wien, Austria
| | - Benedikt Soja
- ETH Zürich, Robert-Gnehm-Weg 15, CH-8093 Zürich, Switzerland
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8
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Cardell M, Jung F, Zechmann-Müller N, Greminger M, Kern L, Jandali AR. Wide awake local anesthesia no tourniquet (WALANT) – a revolutionary improvement in hand surgery. Br J Surg 2021. [DOI: 10.1093/bjs/znab202.055] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Objective
Wide awake local anesthesia no tourniquet (WALANT) hand surgery offers the opportunity to create a bloodless field without using an arm tourniquet. Lidocaine for anesthesia mixed with epinephrine for hemostasis is frequently used without concerns in the hand and finger. This is a major improvement for the patient and the surgeon in terms of patient comfort and having the opportunity to test the hand and finger function intraoperatively. The movement away from tourniquet surgery, which often requires sedation or general anaesthesia is one of the most significant recent advances in hand surgery.
Methods
A subcutaneous infiltration of a mixture (1:100’000) of lidocaine (1%) and epinephrine (buffered 10:1 with 8.4% bicarbonate) is done with a 27 G canula. The mixture is infiltrated wherever surgical dissection, k-wire insertion, or manipulation of fractured bones will occur. The local anesthetic results in an extravascular Bier block. The injection is done slowly from proximal to distal to minimize injection pain. After the last injection a minimum time of 30 minutes should be waited for maximal epinephrine vasoconstriction in the finger.
Results
In the beginning WALANT was only used for small procedures like trigger finger or carpal tunnel release. Meanwhile also major hand surgical procedures like finger fractures, flexor tendon repairs, tendon transfers, arthroscopies, arthroplasties and open triangular fibrocartilage complex (TFCC) repair are performed in WALANT. Even procedures like trapeziectomy have been described using wide awake hand surgery, which involves numbing the joint itself.
Conclusion
The use of WALANT is a proven safe technique that can be used in up to 95% of hand surgical procedures. The benefits for patients and surgeons are obvious. Patients prefer the technique because there are no side effects of opiates or sedation. The anesthetic risk is minimized. Time at hospital is reduced. Patients do not have to suffer tourniquet pain.
Surgeons prefer the technique because of the bloodless surgical field without tourniquet, the possibility of intraoperative testing of stability of prosthesis or fracture stabilization, strength of a tendon repair, the movement and gliding properties in the flexor tendon sheath after repair or testing the tension of tendon transfers. These are probably the reasons for the continuously growing popularity of this technique worldwide.
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Affiliation(s)
- M Cardell
- Clinic for Hand and Plastic Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - F Jung
- Clinic for Hand and Plastic Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - N Zechmann-Müller
- Clinic for Hand and Plastic Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - M Greminger
- Clinic for Hand and Plastic Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - L Kern
- Clinic for Hand and Plastic Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - A R Jandali
- Clinic for Hand and Plastic Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
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Dicembre M, Rives-Langes C, Duquesnoy M, Di Lodovico L, Bemer P, Godart N, Kern L, Ringuenet D, Melchior JC, Hanachi M. Nutritional status, hormonal stress and psychiatric symptoms in severely malnourished anorexia nervosa (AN) patients. Clin Nutr ESPEN 2020. [DOI: 10.1016/j.clnesp.2020.09.127] [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: 10/23/2022]
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10
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Caru M, Curnier D, Bousquet M, Kern L. Evolution of depression during rehabilitation program in patients with cardiovascular diseases. Disabil Rehabil 2018; 42:378-384. [PMID: 30299991 DOI: 10.1080/09638288.2018.1499824] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Background: Cardiovascular diseases represent the main cause of death in the world. Rehabilitation through exercise is more and more used in cardiac patients. Given that these patients suffer from depressive symptoms, the risk of having recurrent cardiovascular problems increases. Thus, the aim of this study is to identify the effects of a rehabilitation program on the physiological and psychological parameters; with a particular attention on the depression scores between the scales.Methods: Twenty-eight cardiac patients participated in this study during a cardiovascular rehabilitation program. They are tested at their entry and at their exit with an evaluation of their physical fitness on an electromagnetic cycle ergometer and by four depression scales (Beck Depression Inventory, Hospital Anxiety and Depression Scale (HADS), Center for Epidemiologic Studies - Depression and Geriatric Depression Screening).Results: We observe that 21.4-50% of these patients have depressive symptoms, according to depression scales. The women have depression scores significantly higher than the men. The rehabilitation program improves their maximal oxygen consumption and their maximal aerobic power. At the end of the rehabilitation program, our analysis identifies a significant decrease in the depression score for the HADS. Regardless of the physical deconditioning level and of the improvement of the maximal oxygen consumption, our results show an effect of the rehabilitation program on the depression scores. No correlation between the physical deconditioning and the different depression scores is observed.Conclusions: This study shows the importance of measuring depression and its severity to improve the care of patients. Our findings show that between 21.4% and 50% of patients have depressive symptoms which challenges the categorical approach of the self-report depression scales.Implications for rehabilitationDepression and cardiovascular diseases have an impact on the patients' physical fitness.The rehabilitation program, primarily based around exercise, reduces depressive symptoms.As soon as cardiovascular diseases patients enter in a rehabilitation program, the depression should be measured by a psychologist.Taking into account the depressive symptoms of the patients as soon as their cardiac event occurs makes it possible to improve the care of patients.
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Affiliation(s)
- M Caru
- Department of Psychology, University of Paris Nanterre, Nanterre, France.,Department of Kinesiology, Laboratory of Pathophysiology of EXercise (LPEX), University of Montreal, Montreal, Canada.,Laboratoire EA 4430 - Clinique Psychanalyse Developpement (CliPsyD), University of Paris Ouest Nanterre La Defense, Nanterre, France
| | - D Curnier
- Department of Kinesiology, Laboratory of Pathophysiology of EXercise (LPEX), University of Montreal, Montreal, Canada.,University of Montreal Hospital Research Center (CRCHUM), Montreal, Canada
| | - M Bousquet
- Saint-Orens Cardiovascular and Pulmonary Rehabilitation Center, Saint-Orens-de-Gameville, France
| | - L Kern
- Laboratoire EA 4430 - Clinique Psychanalyse Developpement (CliPsyD), University of Paris Ouest Nanterre La Defense, Nanterre, France.,Department of Science and Technology of Physical Activities and Sports, University of Paris Nanterre, Nanterre, France.,Laboratoire EA 2931 - Centre de recherches sur le sport et le mouvement (CeRSM), UFR STAPS, University of Paris Nanterre, Nanterre, France
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Dramard V, Kern L, Hofmans J, Rème CA, Nicolas CS, Chala V, Navarro C. Effect of l-theanine tablets in reducing stress-related emotional signs in cats: an open-label field study. Ir Vet J 2018; 71:21. [PMID: 30338056 PMCID: PMC6178259 DOI: 10.1186/s13620-018-0130-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 06/26/2017] [Accepted: 09/21/2018] [Indexed: 11/10/2022] Open
Abstract
Background L-theanine is an aminoacid found in tea leaves which has relaxing effects in humans and animals. It is a structural analogue of glutamate which can bind glutamate receptors. Although the relaxing action of L-theanine has been shown in humans, laboratory animals and dogs, it has never been published in cats. The goal of this open-label, multicentre and prospective trial was to determine whether an L-theanine based oral supplement (Anxitane®, Virbac, France) could attenuate manifestations of stress in cats under field conditions. Case presentation Thirty-three privately owned cats presenting signs associated with stress or fear (inappropriate urination/defecation, fear-induced aggressiveness, hypervigilance/tenseness or physical/functional manifestations of stress) for at least 1 month, were included in the study. They were given L-theanine (Anxitane®, 25 mg twice a day) for 30 days and 20 stress-related parameters were scored at Days 0, 15 and 30. The evolution of some parameters was also rated relative to Day 0. All median scores of the 20 parameters were significantly reduced at D30, and 30/33 cats (91%) had a reduced global score at the end of the study, including 21/33 with ≥50% score reduction. The median (IQR) global scores went from 18 (13-23) at D0 to 11 (8-13) at D15 and 5 (3-12) at D30 (p < 0.0001; Friedman test; significant reduction starting from D15). All the stress-related signs were significantly improved compared to D0, according to the owners, especially inappropriate elimination. Tablet palatability was judged good or very good in 94% of cases with spontaneous intake by cats when given by hand or in food. Tolerance was satisfactory as well, and no side effects were reported, so that most owners (27/33; 82%) were satisfied with the product. Conclusions Despite the lack of a placebo group, it can be concluded that L-theanine (Anxitane®) helped to improve the undesirable manifestations of stress in cats in as soon as 15 days, though better results could be seen after 30 days of administration. These encouraging results show that L-theanine can help manage stress-related behaviour, but additional trials with a placebo group should be run to confirm this effect.
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Affiliation(s)
- V Dramard
- Referral Behaviour Veterinary Clinic, 16 rue Jeanne d'Arc, 69003 Lyon, France
| | - L Kern
- Referral Behaviour Veterinary Clinic, 6 place Léon Deubel, 75016 Paris, France
| | - J Hofmans
- Veterinary Clinic, Avenue des Martyrs 173, 4620 Fléron, Belgium
| | - C A Rème
- 4Medical Department, Virbac, 13ème rue, LID, 06511 Carros, France
| | - C S Nicolas
- 4Medical Department, Virbac, 13ème rue, LID, 06511 Carros, France
| | - V Chala
- 4Medical Department, Virbac, 13ème rue, LID, 06511 Carros, France
| | - C Navarro
- 4Medical Department, Virbac, 13ème rue, LID, 06511 Carros, France
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Kern L, Laforest S, Jammart S, Closs-Prophette F, Sautret K, Pillot P, Yadaden T, Sandrini J, Prophette B, Puéchal X. Une masse pseudo-tumorale vaginale révélant une périartérite noueuse. Rev Med Interne 2018. [DOI: 10.1016/j.revmed.2018.03.129] [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: 11/28/2022]
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Bourdier L, Morvan Y, Kotbagi G, Kern L, Romo L, Berthoz S. Examination of emotion-induced changes in eating: A latent profile analysis of the Emotional Appetite Questionnaire. Appetite 2018; 123:72-81. [DOI: 10.1016/j.appet.2017.11.108] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 11/10/2017] [Accepted: 11/28/2017] [Indexed: 11/29/2022]
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Tavolacci MP, Romo L, Kern L, Ladner J. Attention-deficit/hyperactivity disorder among university students. Eur J Public Health 2017. [DOI: 10.1093/eurpub/ckx187.140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - L Romo
- EA 2931, CeRSM-UFR-STAPS, Nanterre, France
| | - L Kern
- EA 2931, CeRSM-UFR-STAPS, Nanterre, France
| | - J Ladner
- INSERM 1073 University Rouen, Rouen, France
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Luckas A, Romo L, Brumboiu I, Boussouf N, Kern L, Tavolacci MP, Ladner J. Burn out in university students: an international multi-institutional study. Eur J Public Health 2017. [DOI: 10.1093/eurpub/ckx189.187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- A Luckas
- University of Miskolc, Miskolc, Hungary
| | - L Romo
- Paris Nanterre University EA 2931, CeRSM and EA 4430 CLIPSYD, Paris, France
| | - I Brumboiu
- University of Cluj-Napoca, Cluj-Napoca, Romania
| | - N Boussouf
- University of Constantine 3, Constantine, Algeria
| | - L Kern
- Paris Nanterre University EA 2931, CeRSM and EA 4430 CLIPSYD, Paris, France
| | | | - J Ladner
- INSERM U 1073, Rouen University, Rouen, France
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Kern L, Kermen S, Hamdan S, Loubière H, Hery L, De Ybarlucea L, Closs-Prophette F. Artérite à cellules géantes révélée par une atteinte des membres inférieurs. Rev Med Interne 2017. [DOI: 10.1016/j.revmed.2017.03.211] [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: 10/19/2022]
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Kern L. Gesundheit für alle! – eine zentrale Aufgabe der Sozialen Arbeit im Öffentlichen Gesundheitsdienst des Freistaates Bayern – niedergelegt in ihrem Leitbild vom Februar 2015. Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1601930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- L Kern
- Verband der Sozialpädagoginnen und Sozialpädagogen in Bayer. Gesundheitsämtern (VSPG), Erlangen
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Majzik Z, Kern L. „Gesundheit für alle! – Bedarfsorientierte Entwicklung einer regionalen Gesundheitsstrategie“: Vorgehen im Rahmen des Projektes Gesundheitsregionplus Erlangen-Höchstadt & Erlangen. Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1601964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Z Majzik
- Gesundheitsregion plus Erlangen-Höchstadt & Erlangen, Erlangen
| | - L Kern
- Landratsamt Erlangen-Höchstadt, Gesundheitsamt, Erlangen
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Baty F, Ritz C, Kern L, Jensen S, Brutsche M. P145 Modeling of oxygen recovery after 6-min walk tests in COPD. Chest 2017. [DOI: 10.1016/j.chest.2017.04.046] [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: 11/17/2022] Open
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Tavolacci MP, Porrovecchio S, Kern L, Zunquin G, Romo L, Hurdiel R, Ladner J. Neuroenhancement among university students: substance use, motivations and associated factors. Eur J Public Health 2016. [DOI: 10.1093/eurpub/ckw170.004] [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: 11/12/2022] Open
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21
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Lukács A, Tavolacci MP, Kiss-Tóth E, Kern L, Sasvári P, Ladner J. Prevalence and motivations of electronic cigarette users in university students in France and Hungary. Eur J Public Health 2016. [DOI: 10.1093/eurpub/ckw174.148] [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: 11/12/2022] Open
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Ladner J, Mihailescu SD, Kern L, Romo L, Tavolacci MP. Burn out in university students: time now for implementing new public health approaches. Eur J Public Health 2016. [DOI: 10.1093/eurpub/ckw172.042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Caru M, Kern L, Bousquet M, Curnier D. PREVENTIVE FRACTION OF PHYSICAL FITNESS ON RISK FACTORS IN CARDIAC PATIENTS. Can J Cardiol 2016. [DOI: 10.1016/j.cjca.2016.07.454] [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: 10/20/2022] Open
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Tavolacci MP, Vasiliu A, Romo L, Kern L, Ladner J. Cigarette électronique chez les étudiants : deux profils d’utilisateurs. Rev Epidemiol Sante Publique 2016. [DOI: 10.1016/j.respe.2016.06.309] [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] Open
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Ladner J, Kern L, Romo L, Tavolacci MP. Épuisement professionnel (EP) chez les étudiants dans deux universités françaises, 2015. Rev Epidemiol Sante Publique 2016. [DOI: 10.1016/j.respe.2016.06.068] [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] Open
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26
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Bielefeld P, Legendre M, Devilliers H, Turcu A, Muller G, Vernier N, Barrenechea E, Kern L, Laborde C, Ricolfi F, Bron A, Besancenot J. Œdème papillaire bilatéral secondaire à une hypertension intracrânienne dite idiopathique, ne pas oublier la sténose du sinus transverse. Rev Med Interne 2016. [DOI: 10.1016/j.revmed.2016.04.152] [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: 11/27/2022]
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Vernier N, Muller G, Bielefeld P, Turcu A, Devilliers H, Legendre M, Laborde C, Kern L, Andrianiaina H, Martin L, Vignaud J, Besancenot J. Une pleurésie à éosinophiles révélant un rarissime fibrosarcome sclérosant épithélioïde au cours d’une granulomatose éosinophilique avec polyangéïte. Rev Med Interne 2016. [DOI: 10.1016/j.revmed.2016.04.112] [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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Kern L, Kolibabka M, Hammes HP. Functional assessment of retinal neovascularizations. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1580833] [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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Acunman K, Dietrich N, Schlotterer A, Kern L, Klein T, Hammes HP. Der Einfluss des Dipeptidyl Peptidase 4 Inhibitors Bl 1356 (Linagliptin) auf die proliferative Retinopathie im Maus-Modell. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1580905] [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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Tavolacci MP, Vasiliu A, Romo L, Kotbagi G, Kern L, Ladner J. Prevalence, risk behaviors and motivations of electronic cigarette use among French college students. Eur J Public Health 2015. [DOI: 10.1093/eurpub/ckv172.083] [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: 11/12/2022] Open
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Rémond JJ, Kern L, Romo L. Étude sur la « cyber-intimidation » : cyberbullying, comorbidités et mécanismes d’adaptations. Encephale 2015; 41:287-94. [DOI: 10.1016/j.encep.2014.08.003] [Citation(s) in RCA: 13] [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] [Received: 03/19/2013] [Accepted: 02/06/2014] [Indexed: 11/30/2022]
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Chen L, Lin J, Wang J, Aras M, Kolibabka M, Dietrich N, Kern L, Jiang YR, Hammes HP. Apelin play an important role in angiogenesis of mouse retina. DIABETOL STOFFWECHS 2014. [DOI: 10.1055/s-0034-1375101] [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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Wang J, Lin J, Kolibabka M, Kern L, Werhahn L, Chen L, Hammes HP. The role of macrophage migration inhibitory factor in physiological angiogenesis. DIABETOL STOFFWECHS 2014. [DOI: 10.1055/s-0034-1375103] [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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Wang J, Lin J, Aras M, Kolibabka M, Kern L, Friedrichs P, Friedrichs J, Järgen P, Dietrich N, Fleming T, Hammes HP. Methylglyoxal administration induces inflammatory response and microglial activation in the mouse retina. DIABETOL STOFFWECHS 2014. [DOI: 10.1055/s-0034-1375012] [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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Lin J, Chen L, Wang J, Kolibabka M, Aras M, Kern L, Friedrich J, Järgen P, Werhahn L, Friedrichs P, Hammes HP. Apelin induces microglia polarization to pro-inflammatory state. DIABETOL STOFFWECHS 2014. [DOI: 10.1055/s-0034-1375100] [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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Bayer M, Sladovnik P, Herzog R, Kern L. Das Mounier-Kuhn-Syndrom – eine seltene Ursache rezidivierender Bronchitiden. Dtsch Med Wochenschr 2014; 139:722-5. [DOI: 10.1055/s-0034-1369903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- M. Bayer
- Medizinische Klinik, Zuger Kantonsspital, Baar
| | | | - R. Herzog
- Medizinische Klinik, Zuger Kantonsspital, Baar
| | - L. Kern
- Herz & Lungen Zentrum, Zuger Kantonsspital, Baar
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Schramm B, Hauck J, Kern L. Measurements of the Second Virial Coefficients of Some New Chlorofluorocarbons and of Their Binary Mixtures at Temperatures in the Range from 296 K to 475 K. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/bbpc.19920960602] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [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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Romo L, Kern L, Kotbagi G, Plantey S, Boz F, Coeffec A, Cheze N, Lepillet N, Benoit E. EPA-0134 – Video gaming and gambling: an exploratory study in an adolescent french population. Eur Psychiatry 2014. [DOI: 10.1016/s0924-9338(14)77607-2] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Kern L, Baudin N. Validation française du questionnaire de dépendance de l’exercice physique (Exercise Dependence Questionnaire). European Review of Applied Psychology 2011. [DOI: 10.1016/j.erap.2011.08.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
INTRODUCTION Despite the increased interest in exercise dependence, there is limited research examining the personality characteristics of exercise dependent individuals. Furthermore, researchers examining the relationship between exercise dependence and personality have found inconsistent results. This maybe the result of the varying methods used by researchers to assess exercise dependence and personality. AIM OF THE STUDY The purpose of this study was to examine the relationship between exercise dependence and personality, and that determine whether there is an addictive personality type. Participants were 484 university students (M=21.24, SD=3.03), and 322 sport leisure participants (M=30.08, Sd=13.58) who completed multidimensional assessments of exercise dependence and personality. INSTRUMENTS to assess exercise dependence, the EDS-R (French version, Kern, L, 2007, Validation de l'adaptation française de l'échelle de dépendance à l'exercice physique : l'EDS-R Pratiques Psychologiques, 13, 4, 425-441) was undertaken. This scale is based on the DSM_IV criteria for substance dependence which are: withdrawal effects, intention effects, lack of control, time, reductions in other activities, continuance. The D5D was chosen to assess the big five personality dimensions (Rolland, J.-P., & Mogenet, J.-L. (1994). Manuel du système d5d. Paris: ECPA.). These dimensions are: Extraversion, Emotional Stability, Agreeableness, Conscientiousness, and Openness to Experience. To examine the predictive relationship of personality for exercise dependence symptoms, a series of multiple regressions was carried out. RESULTS Results show that, according to the status of the people under scrutiny, it is either openness to experience and emotional stability or openness to experience and agreeableness which explain the greatest variance of exercise dependence. Then, the description of a personality type seemed very difficult to obtain. We feel it's important to know the personality type, but not sufficient; it is more pertinent to know the type of personality. Then, further research could examine the relationship between personality disorder and exercise dependence. In contrast with the literature, we did not find a relationship between exercise dependence and extraversion.
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Affiliation(s)
- L Kern
- Université Nanterre-Paris Ouest-La Défense.
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Schramm B, Elias E, Kern L, Natour G, Schmitt A, Weber C. Precise Measurements of Second Virial Coefficients of Simple Gases and Gas Mixtures in the Temperature Range Below 300 K. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19910950513] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Schuster D, Kern L, Hristozov DP, Terfloth L, Bienfait B, Laggner C, Kirchmair J, Grienke U, Wolber G, Langer T, Stuppner H, Gasteiger J, Rollinger JM. Applications of integrated data mining methods to exploring natural product space for acetylcholinesterase inhibitors. Comb Chem High Throughput Screen 2010; 13:54-66. [PMID: 20214575 PMCID: PMC3547168 DOI: 10.2174/138620710790218212] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [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] [Indexed: 11/22/2022]
Abstract
Nature, especially the plant kingdom, is a rich source for novel bioactive compounds that can be used as lead compounds for drug development. In order to exploit this resource, the two neural network-based virtual screening techniques novelty detection with self-organizing maps (SOMs) and counterpropagation neural network were evaluated as tools for efficient lead structure discovery. As application scenario, significant descriptors for acetylcholinesterase (AChE) inhibitors were determined and used for model building, theoretical model validation, and virtual screening. Top-ranked virtual hits from both approaches were docked into the AChE binding site to approve the initial hits. Finally, in vitro testing of selected compounds led to the identification of forsythoside A and (+)-sesamolin as novel AChE inhibitors.
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Affiliation(s)
- Daniela Schuster
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria and Center of Molecular Biosciences Innsbruck (CMBI)
- Inte:Ligand Softwareentwicklung und Consulting GmbH, Clemens-Maria-Hofbauer-Gasse 6, A-2344 Maria Enzersdorf, Austria
| | - Lisa Kern
- Department of Pharmacognosy, Institute of Pharmacy, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria and Center of Molecular Biosciences Innsbruck (CMBI)
| | | | - Lothar Terfloth
- Molecular Networks GmbH, Henkestr. 91, D-91052 Erlangen, Germany
| | - Bruno Bienfait
- Molecular Networks GmbH, Henkestr. 91, D-91052 Erlangen, Germany
| | - Christian Laggner
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria and Center of Molecular Biosciences Innsbruck (CMBI)
| | - Johannes Kirchmair
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria and Center of Molecular Biosciences Innsbruck (CMBI)
- Inte:Ligand Softwareentwicklung und Consulting GmbH, Clemens-Maria-Hofbauer-Gasse 6, A-2344 Maria Enzersdorf, Austria
| | - Ulrike Grienke
- Department of Pharmacognosy, Institute of Pharmacy, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria and Center of Molecular Biosciences Innsbruck (CMBI)
| | - Gerhard Wolber
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria and Center of Molecular Biosciences Innsbruck (CMBI)
- Inte:Ligand Softwareentwicklung und Consulting GmbH, Clemens-Maria-Hofbauer-Gasse 6, A-2344 Maria Enzersdorf, Austria
| | - Thierry Langer
- Prestwick Chemical Inc., Boulevard Gonthier d’Andernach, 67100 Illkirch, France
| | - Hermann Stuppner
- Department of Pharmacognosy, Institute of Pharmacy, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria and Center of Molecular Biosciences Innsbruck (CMBI)
| | - Johann Gasteiger
- Molecular Networks GmbH, Henkestr. 91, D-91052 Erlangen, Germany
| | - Judith M. Rollinger
- Department of Pharmacognosy, Institute of Pharmacy, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria and Center of Molecular Biosciences Innsbruck (CMBI)
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Kern L. Hilfsmittelversorgung der älteren Menschen – Quo vadis? Gesundheitswesen 2008. [DOI: 10.1055/s-0028-1086447] [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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Rème CA, Dramard V, Kern L, Hofmans J, Halsberghe C, Mombiela DV. Effect of S-adenosylmethionine tablets on the reduction of age-related mental decline in dogs: a double-blinded, placebo-controlled trial. Vet Ther 2008; 9:69-82. [PMID: 18597245] [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: 05/26/2023]
Abstract
Oral S-adenosylmethionine (SAMe) tosylate supplementation (Novifit tablets, Virbac) was evaluated as a dietary aid for the management of age-related mental impairment in dogs. Thirty-six dogs older than 8 years that had displayed signs of cognitive dysfunction for at least 1 month were selected for the study. The dogs were administered 18 mg/kg SAMe tosylate (n=17) or identical placebo tablets (n=19) for 2 months. Concurrent behavioral treatment was forbidden. A 14-item standardized questionnaire evaluated behavior and locomotion difficulties. Compared with the placebo group, SAMe-treated dogs showed greater improvement in activity (41.7% versus 2.6% after 4 weeks, P<.0003; 57.1% versus 9.0% after 8 weeks, P<.003) and awareness (33.3% versus 17.9% after 4 weeks, P<.05; 59.5% versus 21.4% after 8 weeks, P<.01). The aggregate mental impairment score was reduced by more than 50% in 41.2% and 15.8% of dogs treated with SAMe and placebo, respectively, at week 8. SAMe tosylate tablets proved safe and effective in improving signs of age-related mental decline in dogs.
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Affiliation(s)
- C A Rème
- Medical Department, Virbac Laboratories, Carros, France
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Menuet A, Le Page Y, Torres O, Kern L, Kah O, Pakdel F. Analysis of the estrogen regulation of the zebrafish estrogen receptor (ER) reveals distinct effects of ERalpha, ERbeta1 and ERbeta2. J Mol Endocrinol 2004; 32:975-86. [PMID: 15171726 DOI: 10.1677/jme.0.0320975] [Citation(s) in RCA: 157] [Impact Index Per Article: 7.9] [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: 11/27/2022]
Abstract
We have previously cloned and characterized three estrogen receptors (ER) in the zebrafish (zfERalpha, zfERbeta1 and zfERbeta2). We have also shown that they are functional in vitro and exhibit a distinct expression pattern, although partially overlapping, in the brain of zebrafish. In this paper, we have shown that the hepatic expression of these zfER genes responds differently to estradiol (E2). In fact, a 48-h direct exposure of zebrafish to E2 resulted in a strong stimulation of zfERalpha gene expression while zfERbeta1 gene expression was markedly reduced and zfERbeta2 remained virtually unchanged. To establish the potential implication of each zfER in the E2 upregulation of the zfERalpha gene, the promoter region of this gene was isolated and characterized. Transfection experiments with promoter-luciferase reporter constructs together with different zfER expression vectors were carried out in different cell contexts. The data showed that in vivo E2 upregulation of the zfERalpha gene requires ERalpha itself and a conserved transcription unit sequence including at least an imperfect estrogen-responsive element (ERE) and an AP-1/ERE half site at the proximal transcription initiation site. Interestingly, although in the presence of E2 zfERalpha was the most potent at inducing the expression of its own gene, the effect of E2 mediated by zfERbeta2 represented 50% of the zfERalpha activity. In contrast, zfERbeta1 was unable to upregulate the zfERalpha gene whereas this receptor form was able to tightly bind E2 and activate a reporter plasmid containing a consensus ERE. Altogether, these results indicated that the two ERbeta forms recently characterized in teleost fish could have partially distinct and not redundant functions.
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Affiliation(s)
- A Menuet
- Endocrinologie Moléculaire de la Reproduction, UMR CNRS 6026, Université de Rennes 1, 35042 Rennes cedex, France
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Lethimonier C, Tujague M, Kern L, Ducouret B. Peptide insertion in the DNA-binding domain of fish glucocorticoid receptor is encoded by an additional exon and confers particular functional properties. Mol Cell Endocrinol 2002; 194:107-16. [PMID: 12242033 DOI: 10.1016/s0303-7207(02)00181-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [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: 11/17/2022]
Abstract
The trout glucocorticoid receptor (rtGR) contains an additional sequence of nine amino acids located between the two zinc fingers of the DNA-binding domain (DBD) (Endocrinology 136 (1995) 3774). Polymerase chain reaction on trout genomic DNA and sequencing were performed in the DBD region, demonstrating that this peptide is encoded by an additional exon of 27 nucleotides between the two exons encoding the two zinc fingers of other nuclear receptors. This additional sequence in the rtGR confers a better binding affinity of the receptor to a single GRE, as shown by gel shift experiments with GST-DBDrtGR fusion proteins, deleted or not of the nine amino acids (Delta9). This higher affinity is correlated with a higher constitutive transcriptional activity of the receptor on a reporter gene driven by a single GRE, but not with the ligand-induced transcriptional activity. Nevertheless, on a double GRE, the wild type and rtGR-Delta9 are equally active on both constitutive or dexamethasone-induced transcriptional activity. This original DBD structure could have emerged during evolution such as to allow better regulation of glucocorticoid dependent genes in relation to the large spectrum of cortisol physiological functions in fish.
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Affiliation(s)
- C Lethimonier
- Endocrinologie Moléculaire de la Reproduction, UMR-CNRS 6026 Bât 13, Campus de Beaulieu, Université de Rennes 1, 35042 Rennes cedex, France
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Mari G, Detti L, Levi-D'Ancona R, Kern L. "Pseudo" twin-to-twin transfusion syndrome and fetal outcome. J Perinatol 1998; 18:399-403. [PMID: 9766420] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
OBJECTIVE To assess the fetal outcome, in a tertiary center, in pregnancies with suspected twin-to-twin transfusion syndrome (TTTS) not confirmed using ultrasonographic examination, diagnosis of pathology, or both. STUDY DESIGN Forty-four pregnancies with suspected TTTS were followed longitudinally using ultrasonographic examination until delivery. The minimal criteria for the diagnosis of TTTS were: (1) suspicion of monochorionicity gleaned from ultrasound examination (to be confirmed at birth); (2) presence of polyhydramnios in one gestational sac (either assessed subjectively--or, finding that the largest vertical pocket of amniotic fluid was >8 cm in diameter before 20 weeks' gestation and >10 cm in diameter thereafter); and (3) presence of oligohydramnios in the other gestational sac (finding either that there was a "stuck" twin complication or that the largest vertical pocket of amniotic fluid was <1 cm in diameter). When one of the above criteria was not present, the pregnancy was defined as "pseudo" TTTS. Fetal outcome in "pseudo" TTTS was analyzed according to the relative size of the neonate (large or small) and whether the cord insertion was normal or velamentous. RESULTS There were 18 cases of "pseudo" TTTS. No treatment in utero was necessary in any of the 18 pregnancies. The mean gestational age was 21.9 +/- 3.7 (1 SD) weeks at diagnosis and 33.0 +/- 3.0 weeks at delivery. The average weight discrepancy between the twins at birth was 34.3 +/- 14.8%. There were three fetal demises of the small twin and one neonatal demise of the large twin (p > 0.05). Large twins developed respiratory distress syndrome (RDS) more often than small twins (p < 0.05). Five percent of the large twins and 50% of the small twins had a velamentous insertion of the cord (p < 0.05). CONCLUSION In pregnancies complicated by "pseudo" TTTS our data indicate that: (1) small twins have abnormal cord insertion more frequently than large twins, (2) large twins develop RDS more frequently than small twins. Our data suggest that the perinatal mortality in these pregnancies appears to be lower than that reported for the classical TTTS.
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Affiliation(s)
- G Mari
- Department of Obstetrics and Gynecology, Yale University School of Medicine, New Haven, CT 06520-8063, USA
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Ervin RA, DuPaul GJ, Kern L, Friman PC. Classroom-based functional and adjunctive assessments: proactive approaches to intervention selection for adolescents with attention deficit hyperactivity disorder. J Appl Behav Anal 1998; 31:65-78. [PMID: 9532751 PMCID: PMC1284099 DOI: 10.1901/jaba.1998.31-65] [Citation(s) in RCA: 98] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The present investigation evaluated the utility of classroom-based functional and adjunctive assessments of problem behaviors for 2 adolescents who met diagnostic criteria for attention deficit hyperactivity disorder (ADHD) and comorbid oppositional defiant disorder (ODD). For children with ADHD-ODD, environmental classroom variables, when systematically manipulated by teachers, were related to the occurrence and nonoccurrence of problem behaviors. Classroom interventions derived from information that was obtained during functional and adjunctive assessments and from subsequent analyses resulted in substantial reductions in problem behaviors. Teacher and student consumer satisfaction ratings indicated that the interventions were effective and feasible in the classroom setting.
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Affiliation(s)
- R A Ervin
- Department of Counselor Education and Counseling Psychology, Western Michigan University, Kalamazoo 49008-5195, USA
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