1
|
Göbel S, Braun AS, Hahad O, von Henning U, Brandt M, Keller K, Gaida MM, Gori T, Schultheiss HP, Escher F, Münzel T, Wenzel P. Etiologies and predictors of mortality in an all-comer population of patients with non-ischemic heart failure. Clin Res Cardiol 2024; 113:737-749. [PMID: 38224373 PMCID: PMC11026225 DOI: 10.1007/s00392-023-02354-6] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 11/29/2023] [Indexed: 01/16/2024]
Abstract
BACKGROUND Despite progress in diagnosis and therapy of heart failure (HF), etiology and risk stratification remain elusive in many patients. METHODS The My Biopsy HF Study (German clinical trials register number: DRKS22178) is a retrospective monocentric study investigating an all-comer population of patients with unexplained HF based on a thorough workup including endomyocardial biopsy (EMB). RESULTS 655 patients (70.9% men, median age 55 [45/66] years) with non-ischemic, non-valvular HF were included in the analyses. 489 patients were diagnosed with HF with reduced ejection fraction (HFrEF), 52 patients with HF with mildly reduced ejection fraction (HFmrEF) and 114 patients with HF with preserved ejection fraction (HFpEF). After a median follow-up of 4.6 (2.5/6.6) years, 94 deaths were enumerated (HFrEF: 68; HFmrEF: 8; HFpEF: 18), equating to mortality rates of 3.3% and 11.6% for patients with HFrEF, 7.7% and 15.4% for patients with HFmrEF and 5.3% and 11.4% for patients with HFpEF after 1 and 5 years, respectively. In EMB, we detected a variety of putative etiologies of HF, including incidental cardiac amyloidosis (CA, 5.8%). In multivariate logistic regression analysis adjusting for age, sex and comorbidities only CA, age and NYHA functional class III + IV remained independently associated with all-cause mortality (CA: HRperui 3.13, 95% CI 1.5-6.51; p = 0.002). CONCLUSIONS In an all-comer population of patients presenting with HF of unknown etiology, incidental finding of CA stands out to be independently associated with all-cause mortality. Our findings suggest that prospective trials would be helpful to test the added value of a systematic and holistic work-up of HF of unknown etiology.
Collapse
Affiliation(s)
- S Göbel
- Cardiology I - Department of Cardiology, University Medical Center Mainz (Johannes Gutenberg University Mainz), Langenbeckstr. 1, 55131, Mainz, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Rhine Main, Mainz, Germany
| | - A S Braun
- Cardiology I - Department of Cardiology, University Medical Center Mainz (Johannes Gutenberg University Mainz), Langenbeckstr. 1, 55131, Mainz, Germany
| | - O Hahad
- Cardiology I - Department of Cardiology, University Medical Center Mainz (Johannes Gutenberg University Mainz), Langenbeckstr. 1, 55131, Mainz, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Rhine Main, Mainz, Germany
| | - U von Henning
- Cardiology I - Department of Cardiology, University Medical Center Mainz (Johannes Gutenberg University Mainz), Langenbeckstr. 1, 55131, Mainz, Germany
| | - M Brandt
- Cardiology I - Department of Cardiology, University Medical Center Mainz (Johannes Gutenberg University Mainz), Langenbeckstr. 1, 55131, Mainz, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Rhine Main, Mainz, Germany
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz (Johannes Gutenberg-University Mainz), Mainz, Germany
| | - K Keller
- Cardiology I - Department of Cardiology, University Medical Center Mainz (Johannes Gutenberg University Mainz), Langenbeckstr. 1, 55131, Mainz, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Rhine Main, Mainz, Germany
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz (Johannes Gutenberg-University Mainz), Mainz, Germany
| | - M M Gaida
- Institute of Pathology, University Medical Center Mainz (Johannes Gutenberg University Mainz), Mainz, Germany
- TRON, Translational Oncology at the University Medical Center Mainz, Mainz, Germany
| | - T Gori
- Cardiology I - Department of Cardiology, University Medical Center Mainz (Johannes Gutenberg University Mainz), Langenbeckstr. 1, 55131, Mainz, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Rhine Main, Mainz, Germany
| | - H P Schultheiss
- Institute of Cardiac Diagnostics and Therapy (IKDT), Berlin, Germany
| | - F Escher
- Department of Cardiology, Angiology and Intensive Care Medicine, Deutsches Herzzentrum der Charité, Campus Virchow Klinikum, Berlin, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Berlin, Berlin, Germany
| | - T Münzel
- Cardiology I - Department of Cardiology, University Medical Center Mainz (Johannes Gutenberg University Mainz), Langenbeckstr. 1, 55131, Mainz, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Rhine Main, Mainz, Germany
| | - P Wenzel
- Cardiology I - Department of Cardiology, University Medical Center Mainz (Johannes Gutenberg University Mainz), Langenbeckstr. 1, 55131, Mainz, Germany.
- German Center for Cardiovascular Research (DZHK), Partner Site Rhine Main, Mainz, Germany.
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz (Johannes Gutenberg-University Mainz), Mainz, Germany.
| |
Collapse
|
2
|
Tiktak GP, Gabb A, Brandt M, Diz FR, Bravo-Vásquez K, Peñaherrera-Palma C, Valdiviezo-Rivera J, Carlisle A, Melling LM, Cain B, Megson D, Preziosi R, Shaw KJ. Genetic identification of three CITES-listed sharks using a paper-based Lab-on-a-Chip (LOC). PLoS One 2024; 19:e0300383. [PMID: 38574082 PMCID: PMC10994358 DOI: 10.1371/journal.pone.0300383] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 02/27/2024] [Indexed: 04/06/2024] Open
Abstract
Threatened shark species are caught in large numbers by artisanal and commercial fisheries and traded globally. Monitoring both which shark species are caught and sold in fisheries, and the export of CITES-restricted products, are essential in reducing illegal fishing. Current methods for species identification rely on visual examination by experts or DNA barcoding techniques requiring specialist laboratory facilities and trained personnel. The need for specialist equipment and/or input from experts means many markets are currently not monitored. We have developed a paper-based Lab-on-a-Chip (LOC) to facilitate identification of three threatened and CITES-listed sharks, bigeye thresher (Alopias superciliosus), pelagic thresher (A. pelagicus) and shortfin mako shark (Isurus oxyrinchus) at market source. DNA was successfully extracted from shark meat and fin samples and combined with DNA amplification and visualisation using Loop Mediated Isothermal Amplification (LAMP) on the LOC. This resulted in the successful identification of the target species of sharks in under an hour, with a working positive and negative control. The LOC provided a simple "yes" or "no" result via a colour change from pink to yellow when one of the target species was present. The LOC serves as proof-of-concept (PoC) for field-based species identification as it does not require specialist facilities. It can be used by non-scientifically trained personnel, especially in areas where there are suspected high frequencies of mislabelling or for the identification of dried shark fins in seizures.
Collapse
Affiliation(s)
- Guuske P. Tiktak
- Ecology & Environment Research Centre, Manchester Metropolitan University, Manchester, United Kingdom
| | - Alexandria Gabb
- Ecology & Environment Research Centre, Manchester Metropolitan University, Manchester, United Kingdom
| | - Margarita Brandt
- Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito (USFQ), Quito, Ecuador
- Instituto Biósfera, Universidad San Francisco de Quito (USFQ), Quito, Ecuador
| | - Fernando R. Diz
- Marine Conservation Program, WWF Fisheries Ecuador, Guayaquil, Ecuador
| | - Karla Bravo-Vásquez
- Plan de Acción Nacional para la Conservación y el Manejo de Tiburones de Ecuador, Viceministerio de Acuacultura y Pesca, Ministerio de Producción, Comercio Exterior, Inversiones y Pesca, Puerto Pesquero Artesanal de San Mateo, Manta, Manabí, Ecuador
| | | | | | - Aaron Carlisle
- School of Marine Science and Policy, University of Delaware, Lewes, Delaware, United States of America
| | - Louise M. Melling
- Ecology & Environment Research Centre, Manchester Metropolitan University, Manchester, United Kingdom
| | - Bradley Cain
- Ecology & Environment Research Centre, Manchester Metropolitan University, Manchester, United Kingdom
| | - David Megson
- Ecology & Environment Research Centre, Manchester Metropolitan University, Manchester, United Kingdom
| | - Richard Preziosi
- School of Biological and Marine Sciences, University of Plymouth, Plymouth, United Kingdom
| | - Kirsty J. Shaw
- Ecology & Environment Research Centre, Manchester Metropolitan University, Manchester, United Kingdom
| |
Collapse
|
3
|
Happl B, Balber T, Heffeter P, Denk C, Welch JM, Köster U, Alliot C, Bonraisin AC, Brandt M, Haddad F, Sterba JH, Kandioller W, Mitterhauser M, Hacker M, Keppler BK, Mindt TL. Synthesis and preclinical evaluation of BOLD-100 radiolabeled with ruthenium-97 and ruthenium-103. Dalton Trans 2024; 53:6031-6040. [PMID: 38470348 DOI: 10.1039/d4dt00118d] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
BOLD-100 (formerly IT-139, KP1339), a well-established chemotherapeutic agent, is currently being investigated in clinical trials for the treatment of gastric, pancreatic, colorectal, and bile duct cancer. Despite numerous studies, the exact mode of action is still the subject of discussions. Radiolabeled BOLD-100 could be a powerful tool to clarify pharmacokinetic pathways of the compound and to predict therapy responses in patients using nuclear molecular imaging prior to the therapy. In this study, the radiosyntheses of carrier-added (c.a.) [97/103Ru]BOLD-100 were performed with the two ruthenium isotopes ruthenium-103 (103Ru; β-, γ) and ruthenium-97 (97Ru; EC, γ), of which in particular the latter isotope is suitable for imaging by single-photon emission computed tomography (SPECT). To identify the best tumor-to-background ratio for diagnostic imaging, biodistribution studies were performed with two different injected doses of c.a. [103Ru]BOLD-100 (3 and 30 mg kg-1) in Balb/c mice bearing CT26 allografts over a time period of 72 h. Additionally, ex vivo autoradiography of the tumors (24 h p.i.) was conducted. Our results indicate that the higher injected dose (30 mg kg-1) leads to more unspecific accumulation of the compound in non-targeted tissue, which is likely due to an overload of the albumin transport system. It was also shown that lower amounts of injected c.a. [103Ru]BOLD-100 resulted in a relatively higher tumor uptake and, therefore, a better tumor-to-background ratio, which are encouraging results for future imaging studies using c.a. [97Ru]BOLD-100.
Collapse
Affiliation(s)
- B Happl
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria.
- Division of Nuclear Medicine, Department of Biomedical Imaging and Image Guided Therapy, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Josef-Holaubek-Platz 2 and Währinger Straße 42, 1090 Vienna, Austria
| | - T Balber
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria.
- Division of Nuclear Medicine, Department of Biomedical Imaging and Image Guided Therapy, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
- Joint Applied Medicinal Radiochemistry Facility of the University of Vienna and the Medical University of Vienna, Vienna, Austria
| | - P Heffeter
- Center for Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, Borschkegasse 8A, 1090 Vienna, Austria
- Research cluster "Translational Cancer Therapy Research", Währinger Straße 42, 1090 Vienna, Austria
| | - C Denk
- Institute of Applied Synthetic Chemistry, Technische Universität (TU) Wien, Getreidemarkt 9, 1060 Vienna, Austria
- Center for Labelling and Isotope Production, TRIGA Center Atominstitut, TU Wien, Vienna, Austria
| | - J M Welch
- Center for Labelling and Isotope Production, TRIGA Center Atominstitut, TU Wien, Vienna, Austria
| | - U Köster
- Institut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble Cedex 9, France
| | - C Alliot
- GIP ARRONAX, 1 rue Aronnax, CS10112, 44817, Saint-Herblain Cedex, France
- CRCI2NA, Inserm/CNRS/Nantes Université, 8 quai Moncousu, 44007, Nantes Cedex 1, France
| | - A-C Bonraisin
- GIP ARRONAX, 1 rue Aronnax, CS10112, 44817, Saint-Herblain Cedex, France
| | - M Brandt
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria.
- Division of Nuclear Medicine, Department of Biomedical Imaging and Image Guided Therapy, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
- Joint Applied Medicinal Radiochemistry Facility of the University of Vienna and the Medical University of Vienna, Vienna, Austria
| | - F Haddad
- GIP ARRONAX, 1 rue Aronnax, CS10112, 44817, Saint-Herblain Cedex, France
- Laboratoire Subatech, UMR 6457, IMT Nantes Atlantique/CNRS-IN2P3/Nantes Université, 4 Rue A. Kastler, BP 20722, 44307, Nantes Cedex 3, France
| | - J H Sterba
- Center for Labelling and Isotope Production, TRIGA Center Atominstitut, TU Wien, Vienna, Austria
| | - W Kandioller
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Josef-Holaubek-Platz 2 and Währinger Straße 42, 1090 Vienna, Austria
- Research cluster "Translational Cancer Therapy Research", Währinger Straße 42, 1090 Vienna, Austria
| | - M Mitterhauser
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria.
- Division of Nuclear Medicine, Department of Biomedical Imaging and Image Guided Therapy, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Josef-Holaubek-Platz 2 and Währinger Straße 42, 1090 Vienna, Austria
- Joint Applied Medicinal Radiochemistry Facility of the University of Vienna and the Medical University of Vienna, Vienna, Austria
| | - M Hacker
- Division of Nuclear Medicine, Department of Biomedical Imaging and Image Guided Therapy, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - B K Keppler
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Josef-Holaubek-Platz 2 and Währinger Straße 42, 1090 Vienna, Austria
- Research cluster "Translational Cancer Therapy Research", Währinger Straße 42, 1090 Vienna, Austria
| | - T L Mindt
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria.
- Division of Nuclear Medicine, Department of Biomedical Imaging and Image Guided Therapy, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Josef-Holaubek-Platz 2 and Währinger Straße 42, 1090 Vienna, Austria
- Joint Applied Medicinal Radiochemistry Facility of the University of Vienna and the Medical University of Vienna, Vienna, Austria
| |
Collapse
|
4
|
Herzog T, Brandt M, Trinchi A, Sola A, Hagenlocher C, Molotnikov A. Defect detection by multi-axis infrared process monitoring of laser beam directed energy deposition. Sci Rep 2024; 14:3861. [PMID: 38360826 PMCID: PMC10869730 DOI: 10.1038/s41598-024-53931-2] [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] [Received: 06/22/2023] [Accepted: 02/06/2024] [Indexed: 02/17/2024] Open
Abstract
Laser beam directed energy deposition (DED-LB) is an attractive additive manufacturing technique to produce versatile and complex 3D structures on demand, apply a cladding, or repair local defects. However, the quality of manufactured parts is difficult to assess by inspection prior to completion, and parts must be extensively inspected post-production to ensure conformance. Consequently, critical defects occurring during the build go undetected. In this work, a new monitoring system combining three infrared cameras along different optical axes capable of monitoring melt pool geometry and vertical displacement throughout deposition is reported. By combining multiple sensor data, an automated algorithm is developed which is capable of identifying the formation of structural features and defects. An intersecting, thin-walled geometry is used to demonstrate the capability of the system to detect process-induced porosity in samples with narrow intersection angles, which is validated using micro-CT observations. The recorded results indicate the root cause of this process-induced porosity at the intersection, and it is shown that advanced toolpath planning can eliminate such defects. The presented methodology demonstrates the value of multi-axis monitoring for identifying both defects and structural features, providing an advancement towards automated detection and alert systems in DED-LB.
Collapse
Affiliation(s)
- T Herzog
- School of Engineering, Centre for Additive Manufacturing, RMIT University, Melbourne, VIC, 3000, Australia.
- CSIRO Manufacturing, Clayton, VIC, 3168, Australia.
| | - M Brandt
- School of Engineering, Centre for Additive Manufacturing, RMIT University, Melbourne, VIC, 3000, Australia
| | - A Trinchi
- CSIRO Manufacturing, Clayton, VIC, 3168, Australia
| | - A Sola
- CSIRO Manufacturing, Clayton, VIC, 3168, Australia
| | - C Hagenlocher
- School of Engineering, Centre for Additive Manufacturing, RMIT University, Melbourne, VIC, 3000, Australia
| | - A Molotnikov
- School of Engineering, Centre for Additive Manufacturing, RMIT University, Melbourne, VIC, 3000, Australia.
| |
Collapse
|
5
|
Haußmann R, Homeyer P, Haußmann M, Sauer C, Linn J, Donix M, Brandt M, Puetz V. [Analysis of the prevalence of anticoagulant therapy in patients with cognitive disorders and cerebral amyloid angiopathy (CAA)]. Nervenarzt 2024; 95:146-151. [PMID: 37747503 PMCID: PMC10850242 DOI: 10.1007/s00115-023-01547-8] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/11/2023] [Indexed: 09/26/2023]
Abstract
OBJECTIVES To investigate the prevalence of coincident anticoagulation in patients with cognitive disorders and possible or probable cerebral amyloid angiopathy (CAA) as well as the relationship between the presence of oral anticoagulation and CAA-specific lesion load. MATERIALS AND METHODS Patients with subjective cognitive decline (SCD), amnestic and non-amnestic mild cognitive impairment (aMCI/naMCI), Alzheimer's disease (AD), mixed dementia (MD) and vascular dementia (VD) who presented to our outpatient dementia clinic between February 2016 and October 2020 were included in this retrospective analysis. Patients underwent cranial magnetic resonance imaging (MRI). MRI data sets were analyzed regarding the presence of CAA-related MRI biomarkers to determine CAA prevalence. Presence of anticoagulant therapy was determined by chart review. RESULTS Within the study period, 458 patients (209 male, 249 female, mean age 73.2 ± 9.9 years) with SCD (n = 44), naMCI (n = 40), aMCI (n = 182), AD (n = 120), MD (n = 68) and VD (n = 4) were analyzed. A total of 109 patients (23.8%) were diagnosed with possible or probable CAA. CAA prevalence was highest in aMCI (39.4%) and MD (28.4%). Of patients with possible or probable CAA, 30.3% were under platelet aggregation inhibition, 12.8% were treated with novel oral anticoagulants and 3.7% received phenprocoumon treatment. Regarding the whole study cohort, patients under oral anticoagulation showed more cerebral microbleeds (p = 0.047). There was no relationship between oral anticoagulation therapy and the frequency of cortical superficial siderosis (p = 0.634). CONCLUSION CAA is a frequent phenomenon in older patients with cognitive disorders. Almost half of CAA patients receive anticoagulant therapy. Oral anticoagulation is associated with a higher number of cortical and subcortical microbleeds.
Collapse
Affiliation(s)
- R Haußmann
- Klinik und Poliklinik für Psychiatrie und Psychotherapie, Universitätsklinikum Carl Gustav Carus an der Technischen Universität Dresden, Dresden, Deutschland.
- Universitäts DemenzCentrum (UDC), Klinik und Poliklinik für Psychiatrie und Psychotherapie, Uniklinikum Dresden, Dresden, Deutschland.
- Klinik und Poliklinik für Psychiatrie und Psychotherapie, Uniklinikum Dresden, Dresden, Deutschland.
| | - P Homeyer
- Klinik und Poliklinik für Psychiatrie und Psychotherapie, Universitätsklinikum Carl Gustav Carus an der Technischen Universität Dresden, Dresden, Deutschland
| | - M Haußmann
- Dialysepraxis Leipzig, MVZ, Leipzig, Deutschland
| | - C Sauer
- Klinik und Poliklinik für Psychiatrie und Psychotherapie, Universitätsklinikum Carl Gustav Carus an der Technischen Universität Dresden, Dresden, Deutschland
| | - J Linn
- Institut und Poliklinik für diagnostische und interventionelle Neuroradiologie, Universitätsklinikum Carl Gustav Carus an der Technischen Universität Dresden, Dresden, Deutschland
- Dresdner Neurovaskuläres Centrum (DNVC), Universitätsklinikum Carl Gustav Carus an der Technischen Universität Dresden, Dresden, Deutschland
| | - M Donix
- Klinik und Poliklinik für Psychiatrie und Psychotherapie, Universitätsklinikum Carl Gustav Carus an der Technischen Universität Dresden, Dresden, Deutschland
- DZNE, Deutsches Zentrum für Neurodegenerative Erkrankungen, Dresden, Deutschland
- Universitäts DemenzCentrum (UDC), Klinik und Poliklinik für Psychiatrie und Psychotherapie, Uniklinikum Dresden, Dresden, Deutschland
| | - M Brandt
- Klinik und Poliklinik für Neurologie, Universitätsklinikum Carl Gustav Carus an der Technischen Universität Dresden, Dresden, Deutschland
- DZNE, Deutsches Zentrum für Neurodegenerative Erkrankungen, Dresden, Deutschland
- Universitäts DemenzCentrum (UDC), Klinik und Poliklinik für Psychiatrie und Psychotherapie, Uniklinikum Dresden, Dresden, Deutschland
| | - V Puetz
- Klinik und Poliklinik für Neurologie, Universitätsklinikum Carl Gustav Carus an der Technischen Universität Dresden, Dresden, Deutschland
- Dresdner Neurovaskuläres Centrum (DNVC), Universitätsklinikum Carl Gustav Carus an der Technischen Universität Dresden, Dresden, Deutschland
| |
Collapse
|
6
|
Zhang XM, Brandt M, Yue YM, Tong XW, Wang KL, Fensholt R. The Carbon Sink Potential of Southern China After Two Decades of Afforestation. Earths Future 2022; 10:e2022EF002674. [PMID: 37035441 PMCID: PMC10078587 DOI: 10.1029/2022ef002674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 10/05/2022] [Accepted: 11/04/2022] [Indexed: 06/19/2023]
Abstract
Afforestation and land use changes that sequester carbon from the atmosphere in the form of woody biomass have turned southern China into one of the largest carbon sinks globally, which contributes to mitigating climate change. However, forest growth saturation and available land that can be forested limit the longevity of this carbon sink, and while a plethora of studies have quantified vegetation changes over the last decades, the remaining carbon sink potential of this area is currently unknown. Here, we train a model with multiple predictors characterizing the heterogeneous landscapes of southern China and predict the biomass carbon carrying capacity of the region for 2002-2017. We compare observed and predicted biomass carbon density and find that during about two decades of afforestation, 2.34 PgC have been sequestered between 2002 and 2017, and a total of 5.32 Pg carbon can potentially still be sequestrated. This means that the region has reached 73% of its aboveground biomass carbon carrying capacity in 2017, which is 12% more than in 2002, equal to a decrease of 0.77% per year. We identify potential afforestation areas that can still sequester 2.39 PgC, while old and new forests have reached 87% of their potential with 1.85 PgC remaining. Our work locates areas where vegetation has not yet reached its full potential but also shows that afforestation is not a long-term solution for climate change mitigation.
Collapse
Affiliation(s)
- X. M. Zhang
- Guangxi Key Laboratory of Karst Ecological Processes and ServicesInstitute of Subtropical AgricultureChinese Academy of SciencesChangshaChina
- Huanjiang Observation and Research Station for Karst EcosystemChinese Academy of SciencesHuanjiangChina
- University of Chinese Academy of SciencesBeijngChina
| | - M. Brandt
- Department of Geosciences and Natural Resource ManagementUniversity of CopenhagenCopenhagenDenmark
| | - Y. M. Yue
- Guangxi Key Laboratory of Karst Ecological Processes and ServicesInstitute of Subtropical AgricultureChinese Academy of SciencesChangshaChina
- Huanjiang Observation and Research Station for Karst EcosystemChinese Academy of SciencesHuanjiangChina
| | - X. W. Tong
- Guangxi Key Laboratory of Karst Ecological Processes and ServicesInstitute of Subtropical AgricultureChinese Academy of SciencesChangshaChina
- Department of Geosciences and Natural Resource ManagementUniversity of CopenhagenCopenhagenDenmark
| | - K. L. Wang
- Guangxi Key Laboratory of Karst Ecological Processes and ServicesInstitute of Subtropical AgricultureChinese Academy of SciencesChangshaChina
- Huanjiang Observation and Research Station for Karst EcosystemChinese Academy of SciencesHuanjiangChina
| | - R. Fensholt
- Department of Geosciences and Natural Resource ManagementUniversity of CopenhagenCopenhagenDenmark
| |
Collapse
|
7
|
Brandt M, Khraisat S, Doerschmann H, Kalinovic S, Molitor M, Karbach SH, Daiber A, Munzel T, Wenzel P. Telomere shortening in hypertensive heart disease depends on NOX2-mediated loss of PRDX1 and oxidative DNA damage. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2960] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Heart failure (HF) coincides with cardiomyocyte telomere shortening. Arterial hypertension is the most prominent risk factor for HF. Both HF and arterial hypertension are associated with dysregulation of the neurohormonal axis and increased ROS. However, how neurohormonal activation is linked to telomere shortening in the pathogenesis of HF is incompletely understood. Further, recent findings suggest that peroxiredoxin 1 (PRDX1) can act as a telomere specific antioxidant.
Methods
To induce hypertensive HF, male C57BL/6J mice were subjected to AngII-infusion, uninephrectomy and high-salt (AngII++) for 5 weeks. Cardiac function was assessed by ultrasound. Mouse adult cardiomocytes (CMs) isolated from C57BL/6J mice and mice lacking the NADPH-oxidase (NOX) 2/gp91phox as well as rat ventricular CM-derived cells (H9C2) were stimulated with AngII. Telomere length was quantified by Q-FISH after staining with a C-rich telomere probe (TelC). DNA/RNA-damage was evaluated after staining for Oxo-8-Gua (8-oxo-7,8-dihydroguanine) and Oxo-8-G (8-oxo-7,8-dihydroguanosine). Superoxide (O2-) was quantified by 2-hydroxyethidium (2-HE) using HPLC analysis. Colocalization of Oxo-8-Gua and TelC was quantified by automated image analysis. (Sub)cellular and tissue expression of gp91phox/Nox2 and PRDX1 was evaluated by ICC/IHC. All image quantification was conducted semiautomatically.
Results
In mice subjected to hypertensive HF, CM telomere shortening correlated significantly with both left ventricular (LV) dilatation and impairment of LV systolic function, paralleled by a significant loss of myocardial PRDX1 and significantly increased myocardial DNA/RNA-damage. Similarly, CMs stimulated with AngII exhibited significant telomere shortening, significant loss of PRDX1 and significantly increased DNA/RNA-damage, together with significantly increased CM superoxide production and significantly increased expression of the superoxide generating enzyme gp91phox/NOX2. Correspondingly, deficiency of gp91phox/NOX2 significantly prevented AngII-induced CM telomere shortening, DNA/RNA-damage and PRDX1-depletion. A similar effect could be observed upon stimulation of CMs with the specific histone deacetylase (HDAC) 6-inhibitor tubastatin, which prevents deacetylation of PRDX1.
Conclusion
We could provide first evidence that in heart failure, ROS originating from increased NOX2-activity leads to depletion of the telomere-targeted antioxidant and repair-protein PRDX1, which results in damage to the telomeric DNA. Both depletion of NOX2 as well as harnessing the intrinsic antioxidant defense by stabilizing PRDX1 via HDAC6-inhibition prevented CM telomere shortening and could be further evaluated as potential therapeutic targets to address heart failure.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): German Federal Ministry for Education and Research
Collapse
Affiliation(s)
- M Brandt
- University Medical Center of Mainz, Center of Cardiology, Cardiology I , Mainz , Germany
| | - S Khraisat
- University Medical Center of Mainz, Center of Cardiology, Cardiology I , Mainz , Germany
| | - H Doerschmann
- Center for Thrombosis and Hemostasis , Mainz , Germany
| | - S Kalinovic
- University Medical Center of Mainz, Center of Cardiology, Cardiology I , Mainz , Germany
| | - M Molitor
- University Medical Center of Mainz, Center of Cardiology, Cardiology I , Mainz , Germany
| | - S H Karbach
- University Medical Center of Mainz, Center of Cardiology, Cardiology I , Mainz , Germany
| | - A Daiber
- University Medical Center of Mainz, Center of Cardiology, Cardiology I , Mainz , Germany
| | - T Munzel
- University Medical Center of Mainz, Center of Cardiology, Cardiology I , Mainz , Germany
| | - P Wenzel
- University Medical Center of Mainz, Center of Cardiology, Cardiology I , Mainz , Germany
| |
Collapse
|
8
|
Muñoz-Abril L, Torres MDL, Valle CA, Rubianes-Landázuri F, Galván-Magaña F, Canty SWJ, Terán MA, Brandt M, Chaves JA, Grewe PM. Lack of genetic differentiation in yellowfin tuna has conservation implications in the Eastern Pacific Ocean. PLoS One 2022; 17:e0272713. [PMID: 36040879 PMCID: PMC9426925 DOI: 10.1371/journal.pone.0272713] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 09/01/2021] [Accepted: 07/25/2022] [Indexed: 11/19/2022] Open
Abstract
Yellowfin tuna, Thunnus albacares, is an important global fishery and of particular importance in the Eastern Pacific Ocean (EPO). According to the 2019 Inter-American Tropical Tuna Commission (IATTC) assessment, yellowfin tuna within the EPO is a single stock, and is being managed as one stock. However, previous studies indicate site fidelity, or limited home ranges, of yellowfin tuna which suggests the potential for multiple yellowfin tuna stocks within the EPO, which was supported by a population genetic study using microsatellites. If numerous stocks are present, management at the wrong spatial scales could cause the loss of minor yellowfin tuna populations in the EPO. In this study we used double digestion RADseq to assess the genetic structure of yellowfin tuna in the EPO. A total of 164 yellowfin tuna from Cabo San Lucas, México, and the Galápagos Islands and Santa Elena, Ecuador, were analysed using 18,011 single nucleotide polymorphisms. Limited genetic differentiation (FST = 0.00058–0.00328) observed among the sampling locations (México, Ecuador, Peru, and within Ecuador) is consistent with presence of a single yellowfin tuna population within the EPO. Our findings are consistent with the IATTC assessment and provide further evidence of the need for transboundary cooperation for the successful management of this important fishery throughout the EPO.
Collapse
Affiliation(s)
- Laia Muñoz-Abril
- Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador
- Department of Marine Sciences, University of South Alabama, USA Drive North, Mobile, Alabama, United States of America
- * E-mail:
| | - Maria de Lourdes Torres
- Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador
| | - Carlos A. Valle
- Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador
| | - Francisco Rubianes-Landázuri
- Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, México
| | - Steven W. J. Canty
- Smithsonian Marine Station Fort Pierce, Fort Pierce, Florida, United States of America
- Working Land and Seascapes, Smithsonian Institution, Washington, DC, United States of America
| | - Martin A. Terán
- Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador
| | - Margarita Brandt
- Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador
| | - Jaime A. Chaves
- Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador
- Department of Biology, San Francisco State University, San Francisco, CA, United States of America
| | - Peter M. Grewe
- CSIRO Oceans & Atmosphere, Castray Esplanade, Hobart, Tasmania, Australia
| |
Collapse
|
9
|
Bielfeldt S, Urquhart D, Brandt M, Hennighausen N, Bazzanella R. Reduction of residual topical diclofenac in waste water by a wiping procedure before hand washing. Chemosphere 2022; 292:133350. [PMID: 34933024 DOI: 10.1016/j.chemosphere.2021.133350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 12/15/2021] [Accepted: 12/15/2021] [Indexed: 06/14/2023]
Abstract
Diclofenac is non-steroidal anti-inflammatory drug (NSAID) with widespread usage as a topical treatment for relief of pain and inflammation in soft-tissue injuries. While the permeation mechanisms of topically applied diclofenac are well documented, the fate of residual diclofenac not retained at the site of pain following subsequent hand-washing is still not well characterized. The aim of this study quantifies the amount of diclofenac present in rinse water after the application of a topical pain gel containing 23.2 mg/g diclofenac diethylamine, and subsequent washing of the hands. A comparison of two different hand washing techniques was completed with and without wiping hands directly after product application and before washing. A pilot study was completed to optimize the analytical procedures used in the quantification of diclofenac in the rinse water, followed by a main study with 24 test subjects. The data were first analyzed separately and subsequently pooled for statistical analysis. To determine the amount of diclofenac in the rinse water samples, we used reverse phase-liquid chromatography-mass spectrometry (RP-LC-MS/MS). It was determined that a hand washing procedure with a pre-wash wipe of the hands with a paper towel resulted in a 66% reduction in diclofenac released into the waste water system (7.43 ± 3.02 mg/L). This study shows for the first time that a wiping procedure before hand washing will have a significant impact on the amount of diclofenac in the rinse water. Thus, it is possible to significantly impact the release of non-absorbed residual diclofenac after product application.
Collapse
Affiliation(s)
- S Bielfeldt
- ProDERM GmbH, Kiebitzweg 2, 22869, Schenefeld, Germany.
| | - D Urquhart
- GSK Consumer Healthcare SARL, Route de L' Etraz, 1260, Nyon, Switzerland
| | - M Brandt
- ProDERM GmbH, Kiebitzweg 2, 22869, Schenefeld, Germany
| | | | - R Bazzanella
- GSK Consumer Healthcare SARL, Route de L' Etraz, 1260, Nyon, Switzerland
| |
Collapse
|
10
|
Goebel S, Schwuchow-Thonke S, Hahad O, Brandt M, Von Henning U, Escher F, Karbach S, Braun A, Gori T, Schultheiss H, Muenzel T, Wenzel P. Prevalence and outcome of cardiac amyloidosis in an all-comer population of patients with non-ischaemic heart failure. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0846] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Cardiac amyloidosis (CA) is increasingly recognized as an underlying cause of heart failure with preserved ejection fraction (HFpEF), associated with high morbidity and mortality. However, most studies, solely investigated the prevalence of CA in special subgroups including HFpEF and severe aortic valve disease.
Purpose
With the present study we sought to investigate prevalence of different phenotypes of CA in an all comer-population of patients with non-ischaemic heart failure (HF) and to analyze the impact of CA on all-cause mortality.
Methods
The My Biopsy HF-Study (German clinical trials register number: 22178) is a retrospective monocentric study investigating the underlying etiology of HF in an all-comer population of patients with HF of unknown etiology. Patients presenting with symptoms of HF at the University Medical Centre between 14/10/2012 and 01/03/2021, who underwent endomyocardial biopsy (EMB) were enrolled in the present study. Ischaemic HF and valvular HF were ruled out prior to EMB. Specimens were sent for further examination to a specialized laboratory approved by the Food and Drug Administration
Results
Between October 2012 and March 2021, 767 patients (71.6% men) with HF of unknown etiology were included. Mean age at the time of presentation was 55.4 years (±14.4). Altogether, 72.5% of the patients presented with HF with reduced ejection fraction (HFrEF), 7.1% were diagnosed with HF with mid-range ejection fraction (HFmrEF) and 20.4% with HFpEF. Based on histological examination and genotyping, CA was diagnosed in 44 (5.7%) patients (immunglobulin light chain [AL] CA: 15 patients; variant transthyretin [ATTRv] CA: 6 patients; wild type transthyretin [ATTRwt] CA: 21 patients; de novo CA: 2 patients). Patients with CA were older compared with patients without CA (69.4±11.4 vs. 54.1±14.5; p<0.0001), had a higher prevalence of arterial hypertension (68.2% vs. 50.9%; p=0.045) and showed a better left ventricular ejection fraction based on echocardiographic examination (47.5% vs. 32.6%; p<0.0001). With respect to biomarker expression, levels of both brain natriuretic peptide and high-sensitive troponin I were significantly higher in patients without CA (BNP: 914.1 vs 612; p=0.01; troponin I: 812.8 vs. 171.7; p=0.006). In univariate logistic regression analysis CA was associated with a significant all-cause mortality (hazard ratio [HR] per unit increase [ui], 5.17, 95% CI, 2.93–9.08; p<0.0001), even after adjustment for classical cardiovascular risk factors (HRperui 3.12, 95% CI, 1.11–8.76; p=0.03) and comorbidities like chronic obstructive pulmonary disease, chronic kidney disease and stroke (HRperui 2.93, 95% CI, 1.2–7.15; p=0.018).
Conclusions
Among patients presenting with HF of unknown etiology, including patients with HFpEF, HFmrEF and HFrEF, cardiac amyloidosis is the underlying cause of HF in 5.7% of patients and is independently associated with all-cause mortality.
Funding Acknowledgement
Type of funding sources: None.
Collapse
Affiliation(s)
- S Goebel
- University Medical Center, Department of Cardiology, Mainz, Germany
| | | | - O Hahad
- University Medical Center, Department of Cardiology, Mainz, Germany
| | - M Brandt
- University Medical Center, Department of Cardiology, Mainz, Germany
| | - U Von Henning
- University Medical Center, Department of Cardiology, Mainz, Germany
| | - F Escher
- Institute of Cardiac Diagnostics and Therapy (IKDT), Berlin, Germany
| | - S Karbach
- University Medical Center, Department of Cardiology, Mainz, Germany
| | - A.S Braun
- University Medical Center, Department of Cardiology, Mainz, Germany
| | - T Gori
- University Medical Center, Department of Cardiology, Mainz, Germany
| | - H.P Schultheiss
- Institute of Cardiac Diagnostics and Therapy (IKDT), Berlin, Germany
| | - T Muenzel
- University Medical Center, Department of Cardiology, Mainz, Germany
| | - P Wenzel
- University Medical Center, Department of Cardiology, Mainz, Germany
| |
Collapse
|
11
|
Brandt M, Doerschmann H, Kalinovic S, Daiber A, Muenzel T, Wenzel P. Telomere shortening in heart failure due to excess neurohormonal activation is associated with loss of nuclear TRF-2 and increased telomeric DNA damage and predicts cardiac recovery. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0723] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
The mechanisms and clinical significance of telomere shortening in heart failure remain elusive. Mammalian cardiomyocyte (CM) regeneration is limited and CM cell division cannot account for telomere shortening. Whether telomere shortening in turn affects cardiac recovery remains unexplored.
We induced heart failure by excess neurohormonal activation (NHA), a universal dysregulation in the failing heart.
B6 mice were subjected to AngII-infusion, uninephrectomy and high-salt (AngII++) to induce excess NHA for 5 weeks. Cardiac function was assessed by ultrasound. Human iPSC-derived CMs, mouse CMs and rat ventricular CMs (H9C2) were stimulated with AngII. Human cardiac biopsies from patients with heart failure with reduced ejection fraction (HFrEF) were grouped depending on cardiac recovery. Telomere length was quantified by Q-FISH. ROS-induced DNA/RNA-damage was evaluated after staining for 8-oxo-7,8-dihydro-2'-deoxyguanosine, -guanine and – guanosine-residues (8-oxo-dG). H9C2-cells were co-stained for telomeres, telomere repeat binding factor 2 (TRF-2) and 8-oxo-dG, telomere-specific DNA-damage was quantified by automated colocalization analysis. Superoxide (O2-) was quantified by 2-hydroxyethidium (2-HE) using HPLC analysis. Fibrosis was quantified by Sirius red staining.
AngII++-mice exhibited left ventricular (LV) hypertrophy (p<0.0001 vs B6) along with reduced LV ejection fraction (p=0.03 vs B6), reduced global longitudinal strain (p<0.001 vs B6) along with significant telomere shortening in CMs isolated from AngII++-mice (p=0.0082 vs B6). Telomere length showed a significant correlation with LV systolic function (r2=0.64, p=0.006). While 8-oxo-dG-staining revealed significantly increased ROS-induced DNA/RNA damage in AngII++-myocardial sections overall (p<0.0001 vs B6), DNA/RNA-damage was highest in areas of fibrotic adverse remodeling congruent with significant telomere shortening (p<0.0122 fibrotic vs non-fibrotic AngII++-myocardium, p<0.0001 vs B6). In all cells tested, NHA resulted in significant telomere shortening. As a potential explanation, CMs stimulated with AngII revealed significantly increased, dose-dependent O2–production (AngII 10 nM p=0.03, AngII 50 nm p=0.0004 vs H9C2) along with significant loss of nucelar TRF2 (AngII nM p=0.0049, Ang II 50 nM p<0.0001 vs H9C2), while colocalization analysis revealed a significantly increased ROS-induced damage to the telomeric DNA (AngII 10/50 nm p<0.05 vs H9C2).
HFrEF-patients that had recovered cardiac function (ΔLVEF +5 – 30%) showed significantly longer myocardial telomeres than patients with no recovery/worsening (ΔLVEF −10 – 0%) (p=0.008), overall the telomere signal correlated significantly with ΔLVEF (r2=0.41, p=0.03).
Our data provides insides into how excess NHA via increased ROS, loss of nuclear TRF-2 and increased telomeric DNA-damage causes myocardial telomere shortening in heart failure and further that the extent of telomere shortening determines cardiac recovery.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): BMBF 01EO1003
Collapse
Affiliation(s)
- M Brandt
- University Medical Center of Mainz, Center of Cardiology, Cardiology I, Mainz, Germany
| | - H Doerschmann
- University Medical Center of Mainz, Center of Cardiology, Cardiology I, Mainz, Germany
| | - S Kalinovic
- University Medical Center of Mainz, Center of Cardiology, Cardiology I, Mainz, Germany
| | - A Daiber
- University Medical Center of Mainz, Center of Cardiology, Cardiology I, Mainz, Germany
| | - T Muenzel
- University Medical Center of Mainz, Center of Cardiology, Cardiology I, Mainz, Germany
| | - P Wenzel
- University Medical Center of Mainz, Center of Cardiology, Cardiology I, Mainz, Germany
| |
Collapse
|
12
|
Vega AG, Mazaira MR, Fernandez NM, Nuñez MI, Brandt M, Juan LV, Vargas PP, Rodriguez ZG, Bermudez SC, Seivane RGA, Abbad RSDLC. O-199 Proof of concept: implantation window must be wider than proposed. Report of seven twins after asynchronous double embryo transfer. Hum Reprod 2021. [DOI: 10.1093/humrep/deab128.010] [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: 11/13/2022] Open
Abstract
Abstract
Study question
Can simultaneous transfer of two embryos that were cryopreserved at different stages (D3 and Blastocyst) be appropriate to enhance success in women with more than three failed embryo transfers?
Summary answer
Double asynchronous embryo transfer offered excellent results in RIF. Unexpectedly high twin rate suggests that embryo-endometrium synchrony is overemphasized. Implantation window must be wider.
What is known already
Transcriptomic signature of the endometrium has been investigated in the last few years trying to understand the best moment for embryo implantation. Nevertheless, the optimal period has not been well established yet in humans. Simultaneous transfer of two human embryos at different developmental stages (D3 and Blastocyst) on Day 4 was proposed to help couples who have had RIF.
Study design, size, duration
Observational case-control study. From April 2016 to January 2021, we offered double asynchronous embryo transfer only after Recurrent Implantation Failure (RIF). Two requirements were necessary: 1) Double embryo transfer was acceptable by the couple due to poor reproductive outcome. 2) Availability of two embryos cryopreserved at different stage (D3 and Blastocyst). Results were compared with good prognosis patients (all patients under 35 years in that period who had elected to transfer two day 3 cryopreserved embryos).
Participants/materials, setting, methods
Forty-five patients accepted to participate in the study. Results were compared with all patients (237) under 35 years where two D3 thawed embryos were transferred. All cases received same protocol (oral estradiol 6mg/d or vaginal estradiol 4mg/d until ultrasound showed endometrial growth) LH, P4 and E2 were monitored in all patients to detect spontaneous LH surge. All cases received transvaginal micronized progesterone 800 mg/d. Embryo transfers were ultrasound guided and Wallace Embryosure catheter was employed.
Main results and the role of chance
Limitations, reasons for caution
Multiple pregnancy rate was unacceptably high. Therefore, it should not be suggested for good prognosis couples where single embryo transfer is clearly advidsed. Our main limitation was the combination of D3 embryos with blastocysts. The retrospective design make the results to be considered as a proof of concept.
Wider implications of the findings
Double asynchronic embryo transfer can offer new insights in the understanding of human implantation. The concept of implantation window is clearly challenged. Aiming to the center of the window is fine, but we still dońt know how wide is that center.
Trial registration number
not applicable
Collapse
Affiliation(s)
- A. Gosálvez Vega
- Hospital Quironsalud Madrid, Unidad Reproducción Asistida, Madrid, Spain
| | | | | | - M. Iglesias Nuñez
- Hospital Quironsalud Madrid, Unidad Reproducción Asistida, Madrid, Spain
| | - M Brandt
- Hospital Quironsalud Madrid, Unidad Reproducción Asistida, Madrid, Spain
| | - L. Vidal Juan
- Hospital Quironsalud Madrid, Unidad Reproducción Asistida, Madrid, Spain
| | - P. Pastor Vargas
- Hospital Quironsalud Madrid, Unidad Reproducción Asistida, Madrid, Spain
| | | | - S. Corral Bermudez
- Hospital Quironsalud Madrid, Unidad Reproducción Asistida, Madrid, Spain
| | | | | |
Collapse
|
13
|
Stettler H, Crowther JM, Brandt M, Boxshall A, Lu B, de Salvo R, Laing S, Hennighausen N, Bielfeldt S, Blenkiron P. Multi parametric biophysical assessment of treatment effects on xerotic skin. Skin Health Dis 2021; 1:e21. [PMID: 35664981 PMCID: PMC9060006 DOI: 10.1002/ski2.21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 02/10/2021] [Accepted: 02/16/2021] [Indexed: 12/16/2022]
Abstract
Background Topical moisturizing products are widely used to alleviate the problems associated with xerotic skin. Their use affects many properties of the stratum corneum (SC) in a complex and interrelated manner. The range of measurement techniques available to the researcher has increased in recent years. However, few studies have looked for correlations between the different techniques for assessing how aspects of xerotic skin change over time as a result of topical moisturizer usage. Objectives A 3‐week in vivo study using an oil‐in‐water based moisturizing product and an untreated site was conducted to determine the clinical significance of and any correlations between a range of different approaches for the measurement of skin lipid content and also skin hydration and visual grading of dry skin. Methods A range of traditional and more recently developed skin measurement techniques have been used to examine a variety of SC properties in normal and xerotic skin during topical moisturizer usage. Results In vivo confocal Raman spectroscopy and analysis of SC lipids from tape strips both showed an increase in SC lipid level and organization after 3 weeks of moisturizer usage on xerotic skin. Hydration, measured both optically and electrically, also increased and skin barrier function improved, with strong correlations between the different measures of dryness being observed. Conclusions Strong correlations were observed between the skin measurements for lipid assessment and skin hydration with regard to the assessment of xerotic skin, providing valuable new information for future in vivo clinical research into dry and atopic skin. Keywords biophysical assessment, skin barrier, skin hydration, topical moisturizers, Xerosis
Collapse
Affiliation(s)
- H Stettler
- Bayer Consumer Care AG Basel Switzerland
| | | | - M Brandt
- proDERM GmbH Schenefeld/Hamburg Germany
| | | | - B Lu
- Bayer Healthcare SAS Gaillard France
| | - R de Salvo
- Bayer Consumer Care AG Basel Switzerland
| | - S Laing
- proDERM GmbH Schenefeld/Hamburg Germany
| | | | | | | |
Collapse
|
14
|
Topf A, Paar V, Grueninger J, Wernly B, Weber T, Mahfoud F, Lichtenauer M, Hoppe U, Brandt M, Motloch L. sST2 is a promising biomarker in hypertensive patients undergoing renal denervation. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2789] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Therapy resistant arterial hypertension (raHTN) is a major clinical burden. While therapeutic alternatives are still missing, novel interventional procedures like renal denervation (RD) are still evolving. Indeed, despite discoursing results of the Simplicity HTN-3 trial, new promising results resulted in a revival of this procedure. Therefore, predictors for the success of future interventions would be of great clinical benefit. The novel biomarker sST2 shows promising results for risk stratification of cardiovascular patient. While, sST2 belongs to the IL-1 receptor family, it has an influence on immunologic processes with consequent cardioprotective effects including prevention of myocardial hypertrophy and fibrosis indicating predictive potential in hypertensive heart disease. Nevertheless, clinical implementation of this promising biomarker was not investigated in patients with raHTN undergoing RD.
Purpose
To investigate a potential clinical relevance of sST2 in patients with raHTN undergoing RD.
Methods
We evaluated 58 patients with raHTN (age: 63±11 years, systolic blood pressure at baseline: 178±24mmHg) undergoing bilateral RD. If available, serum levels of sST2 were analyzed at baseline as well as at follow-up at one and/or three month.
Results
While RD was able to decrease blood pressure levels after one month (systolic blood pressure at one month: 158±21mmHg, p<0.01), on echocardiography a reduction of left ventricular mass (LVM) was observed at one month with a further significant reduction at three month (LVM at baseline: 233±68g, LVM at one month: 218±59g and LVM at three month: 181±59, p<0.01). This observation was accompanied by a significant decrease of sST2 levels at three month (sST2 baseline: 6322±3578pg/ml vs. sST2 three month: 4704±1586pg/ml, p=0.02). Furthermore, baseline sST2 was positively correlated with systolic blood pressure at one month, measured either at office (r=0.57, p<0.01) or invasively in the aorta (r=0.49, p=0.03) indicating a potential predictive value of this biomarker.
Conclusion
In patients with raHTN, RD is associated with a significant decrease of sST2 levels, indicating sST2 to be involved in remodeling processes after RD. Furthermore, sST2 levels at baseline might be a potential predictor of intervention success of RD. Further, studies need to investigate the association of sST2 levels and RD.
Funding Acknowledgement
Type of funding source: None
Collapse
Affiliation(s)
- A Topf
- Universitaetsklinikum Salzburg, II. medicine, Salzburg, Austria
| | - V Paar
- Universitaetsklinikum Salzburg, II. medicine, Salzburg, Austria
| | - J Grueninger
- Universitaetsklinikum Salzburg, II. medicine, Salzburg, Austria
| | - B Wernly
- Universitaetsklinikum Salzburg, II. medicine, Salzburg, Austria
| | - T Weber
- Klinikum Wels-Grieskirchen, Cardiology, Wels, Austria
| | - F Mahfoud
- Saarland University Hospital, internal medicine III., Homburg, Germany
| | - M Lichtenauer
- Universitaetsklinikum Salzburg, II. medicine, Salzburg, Austria
| | - U Hoppe
- Universitaetsklinikum Salzburg, II. medicine, Salzburg, Austria
| | - M Brandt
- Universitaetsklinikum Salzburg, II. medicine, Salzburg, Austria
| | - L.J Motloch
- Universitaetsklinikum Salzburg, II. medicine, Salzburg, Austria
| |
Collapse
|
15
|
Garlapati V, Molitor M, Efentakis P, Lagrange J, Wild J, Karbach S, Vujacic-Mirski K, Muenzel T, Daiber A, Brandt M, Kossmann S, Milting H, Gori T, Ruf W, Wenzel P. Tissue factor cytoplasmic tail regulates myeloid cell derived superoxide formation and TGF-beta 1 driven cardiac remodeling in myocardial infarction. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3635] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
In the setting of myocardial infarction (MI), patients with coronary no-reflow and/or delayed presentation after onset of symptoms (sub-acute MI) are inflicted by severe thrombo-inflammation and are marked by worse clinical outcome. However, it is unclear whether tissue factor (TF) contributes to outcome post MI solely by the regulatory functions of its cytoplasmic tail independently of its coagulation activity.
Purpose
We analyzed the role of the TF cytoplasmic domain in the recruitment of myeloid cells into the infarcted myocardium and the consequences on cardiac remodeling, scar formation, development of heart failure and survival post MI.
Methods
Twelve Patients enrolled in the MICAT (Mainzer Intracoronary Database, ClinicalTrials.gov Identifier: NCT02180178) study were examined. Patients with sub-acute MI and stable coronary artery disease were defined and monocytes were isolated from peripheral blood mononuclear cells (PBMCs). Human heart samples acquired from the left ventricular wall of explanted hearts following cardiac transplantation or obtained during implantation of left ventricular assist device. Samples were investigated for downstream analysis of protein by western blots, RNA quantification and cryo-sectioning. MI was induced in 9 to 12 weeks old male C57BL/6J mice, mice specifically lacking the cytoplasmic tail (CT) of TF (TFΔCT mice) and TFfl/flLysMCre+/− mice by permanent ligation of the left anterior descending artery. Left ventricular function was assessed by High-Frequency Ultrasound System. Infiltration of immune cells into the infarcted myocardium was analyzed by performing flow cytometric analysis after enzymatic digestion of the myocardium. Superoxide levels were quantified by HPLC-based measurement of dihydroethidium derived oxidation product 2-hydroxy ethidium.
Results
Circulating monocytes in patients with sub-acute MI showed increased nitrosative stress as well as increased phosphorylation of TF CT along with TGF-β1 and NF-kB inflammatory activation, which was recapitulated in cardiac tissue of end-stage heart failure patients with chronic MI. MI results in phosphorylation of the CT of TF within myeloid cells. Using mice with conditional knockout of TF on myeloid cells or TFΔCT mice, we found that this regulatory intracellular domain of TF within myeloid cells is required for cardiac infiltration of inflammatory Ly6Chigh TF+ monocytes, Rac-1 GTPase and superoxide formation of gp91phox + myeloid cells in MI. TGF-β1 dependent SMAD2 activation and cardiac collagen deposition as late sequel of MI was reduced in TFΔCT mice, resulting in attenuated cardiac dysfunction and reduced mortality.
Conclusion
We conclude that, TF CT drives NADPH-oxidase derived superoxide formation, thrombo-inflammation and cardiac fibrosis. Therefore, it might serve as putative biomarker and risk predictor in MI
Funding Acknowledgement
Type of funding source: None
Collapse
Affiliation(s)
- V.S Garlapati
- Center for Thrombosis and Hemostasis, German Center for Cardiovascular Research (DZHK) – Partner site Rhine-Main, Mainz, Germany
| | - M Molitor
- Center for Thrombosis and Hemostasis, German Center for Cardiovascular Research (DZHK) – Partner site Rhine-Main, Mainz, Germany
| | - P Efentakis
- Center for Thrombosis and Hemostasis, Mainz, Germany
| | - J Lagrange
- Center for Thrombosis and Hemostasis, Mainz, Germany
| | - J Wild
- Center for Thrombosis and Hemostasis, Mainz, Germany
| | - S Karbach
- Center for Thrombosis and Hemostasis, German Center for Cardiovascular Research (DZHK) – Partner site Rhine-Main, Mainz, Germany
| | - K Vujacic-Mirski
- University Medical Center of Mainz, Center for Cardiology - Cardiology 1, Mainz, Germany
| | - T Muenzel
- Center for Thrombosis and Hemostasis, German Center for Cardiovascular Research (DZHK) – Partner site Rhine-Main, Mainz, Germany
| | - A Daiber
- University Medical Center of Mainz, Center for Cardiology - Cardiology 1, Mainz, Germany
| | - M Brandt
- Center for Thrombosis and Hemostasis, German Center for Cardiovascular Research (DZHK) – Partner site Rhine-Main, Mainz, Germany
| | - S Kossmann
- University of Sydney, The Heart Research Institute, Camperdown, Australia
| | - H Milting
- Herz- und Diabeteszentrum NRW, Ruhr-Universitaet Bochum, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
| | - T Gori
- University Medical Center of Mainz, Center for Cardiology - Cardiology 1, Mainz, Germany
| | - W Ruf
- Center for Thrombosis and Hemostasis, German Center for Cardiovascular Research (DZHK) – Partner site Rhine-Main, Mainz, Germany
| | - P Wenzel
- Center for Thrombosis and Hemostasis, German Center for Cardiovascular Research (DZHK) – Partner site Rhine-Main, Mainz, Germany
| |
Collapse
|
16
|
|
17
|
Carrera M, Trujillo JE, Brandt M. First record of a by-the-wind-sailor ( Velella velella Linnaeus, 1758) in the Galápagos Archipelago - Ecuador. Biodivers Data J 2019; 7:e35303. [PMID: 31523158 PMCID: PMC6713666 DOI: 10.3897/bdj.7.e35303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 05/26/2019] [Indexed: 11/12/2022] Open
Abstract
We present the first official record of the by-the-wind-sailor (Velellavelella) for Ecuador. Twelve individuals were found along different beaches of San Cristóbal and Santa Cruz Islands in Galápagos Archipelago, Ecuador. These sightings may be influenced by El Niño Southern Oscillation events.
Collapse
Affiliation(s)
- Martín Carrera
- Granados 374 y Eloy Alfaro, Conjunto Camino Real, Quito, Ecuador Granados 374 y Eloy Alfaro, Conjunto Camino Real Quito Ecuador
| | - José E Trujillo
- Puerto Azul Mz C7 V14, 090112 , Guayaquil, Ecuador Puerto Azul Mz C7 V14, 090112 Guayaquil Ecuador
| | - Margarita Brandt
- Universidad San Francisco de Quito/Galápagos Science Center, Quito, Ecuador Universidad San Francisco de Quito/Galápagos Science Center Quito Ecuador
| |
Collapse
|
18
|
Ritter PS, Schwabedal J, Brandt M, Schrempf W, Brezan F, Krupka A, Sauer C, Pfennig A, Bauer M, Soltmann B, Nikitin E. Sleep spindles in bipolar disorder - a comparison to healthy control subjects. Acta Psychiatr Scand 2018; 138:163-172. [PMID: 29974456 DOI: 10.1111/acps.12924] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/08/2018] [Indexed: 01/09/2023]
Abstract
OBJECTIVE Bipolar disorder is a severe mental disorder for which currently no reliable biomarkers exist. It has been shown that patients with schizophrenia but not with unipolar depression have a reduced density of fast sleep spindles during N2 sleep. The aim of this study was to assess fast sleep spindle density in euthymic patients with bipolar disorder. METHODS Patients with bipolar disorder (n = 24) and healthy control subjects (n = 25) were assessed using all-night polysomnography. Sleep spindles within stage N2 sleep were identified by visual inspection and subdivided into fast (>13 Hz) and slow (≤13 Hz) spindles. All spindles were subsequently characterised by density, frequency, amplitude, duration and coherence. RESULTS Euthymic patients with bipolar disorder were found to have a reduced density and a lower mean frequency of fast spindles. Slow spindle density and frequency did not differ between groups. There were no differences regarding amplitude, duration or coherence. CONCLUSIONS A reduction in fast spindle density during N2 sleep points towards thalamic dysfunction as a potential neurobiological mechanism of relevance in bipolar disorder. In addition, a reduced sleep spindle density could be interpreted as a common endophenotype shared with schizophrenia but not unipolar depression and may - if replicated - be of utility in early recognition and risk stratification.
Collapse
Affiliation(s)
- P S Ritter
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - J Schwabedal
- Department of Biomedical Informatics, Emory University School of Medicine, Atlanta, GA, USA
| | - M Brandt
- Department of Neurology, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,German Center for Neurodegenerative Diseases (DZNE) Dresden, Dresden, Germany
| | - W Schrempf
- Department of Neurology, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - F Brezan
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - A Krupka
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - C Sauer
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - A Pfennig
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - M Bauer
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - B Soltmann
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - E Nikitin
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| |
Collapse
|
19
|
Garlapati VS, Brandt M, Lagrange J, Kossmann S, Ruf W, Wenzel P. P913Lack of tissue factor cytoplasmic tail attenuates cardiac injury after myocardial infarction. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p913] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- V S Garlapati
- Center for Thrombosis and Hemostasis, Mainz, Germany
| | - M Brandt
- Center for Thrombosis and Hemostasis, Mainz, Germany
| | - J Lagrange
- Center for Thrombosis and Hemostasis, Mainz, Germany
| | - S Kossmann
- Center for Thrombosis and Hemostasis, Mainz, Germany
| | - W Ruf
- Center for Thrombosis and Hemostasis, Mainz, Germany
| | - P Wenzel
- Center for Thrombosis and Hemostasis, Mainz, Germany
| |
Collapse
|
20
|
Kolbitsch T, Larbig R, Reda S, Blasius A, Paar V, Wernly B, Ohnewein B, Dinges C, Lichtenauer M, Brandt M, Hoppe UC, Motloch LJ. P5136Coronary tortuosity is an indicator of poor controlled arterial hypertension and correlates with the severity of dyspnea in the absence of coronary artery disease. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5136] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- T Kolbitsch
- University Clinics Salzburg, Internal Medicine II, Salzburg, Austria
| | - R Larbig
- Clinics Maria Hilf, Cardiology, Mönchengladbach, Germany
| | - S Reda
- University Clinics Salzburg, Internal Medicine II, Salzburg, Austria
| | - A Blasius
- Clinics Maria Hilf, Cardiology, Mönchengladbach, Germany
| | - V Paar
- University Clinics Salzburg, Internal Medicine II, Salzburg, Austria
| | - B Wernly
- University Clinics Salzburg, Internal Medicine II, Salzburg, Austria
| | - B Ohnewein
- University Clinics Salzburg, Internal Medicine II, Salzburg, Austria
| | - C Dinges
- University Clinics Salzburg, Cardiac Surgery, Salzburg, Austria
| | - M Lichtenauer
- University Clinics Salzburg, Internal Medicine II, Salzburg, Austria
| | - M Brandt
- University Clinics Salzburg, Internal Medicine II, Salzburg, Austria
| | - U C Hoppe
- University Clinics Salzburg, Internal Medicine II, Salzburg, Austria
| | - L J Motloch
- University Clinics Salzburg, Internal Medicine II, Salzburg, Austria
| |
Collapse
|
21
|
Fietz J, Kaschowitz J, Brandt M. SOCIAL NETWORKS AND SOCIAL SUPPORT OF OLDER MIGRANTS. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.4282] [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)
- J. Fietz
- Chair for Social Structure & Sociology of Ageing Societies, Institute for Sociology, Dortmund, Germany
| | - J. Kaschowitz
- Chair for Social Structure & Sociology of Ageing Societies, Institute for Sociology, Dortmund, Germany
| | - M. Brandt
- Chair for Social Structure & Sociology of Ageing Societies, Institute for Sociology, Dortmund, Germany
| |
Collapse
|
22
|
Montalban-Bravo G, Huang X, Naqvi K, Jabbour E, Borthakur G, DiNardo CD, Pemmaraju N, Cortes J, Verstovsek S, Kadia T, Daver N, Wierda W, Alvarado Y, Konopleva M, Ravandi F, Estrov Z, Jain N, Alfonso A, Brandt M, Sneed T, Chen HC, Yang H, Bueso-Ramos C, Pierce S, Estey E, Bohannan Z, Kantarjian HM, Garcia-Manero G. Erratum: A clinical trial for patients with acute myeloid leukemia or myelodysplastic syndromes not eligible for standard clinical trials. Leukemia 2017; 31:1659. [DOI: 10.1038/leu.2017.85] [Citation(s) in RCA: 6] [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: 11/09/2022]
|
23
|
Abstract
A review on additive manufacturing (AM) applied to heterogeneous catalysis reveals enabling power of AM and challenges to overcome in chemical interfacing and material printability.
Collapse
Affiliation(s)
- C. Hurt
- Centre for Additive Manufacturing
- RMIT University
- Australia
| | - M. Brandt
- Centre for Additive Manufacturing
- RMIT University
- Australia
| | - S. S. Priya
- Centre for Advanced Materials & Industrial Chemistry (CAMIC)
- RMIT University
- Australia
| | - T. Bhatelia
- CSIRO: Clayton Site
- Australia
- CSIRO Energy
- Kensington WA 6151
- Australia
| | | | - PR. Selvakannan
- Centre for Advanced Materials & Industrial Chemistry (CAMIC)
- RMIT University
- Australia
| | - S. Bhargava
- Centre for Advanced Materials & Industrial Chemistry (CAMIC)
- RMIT University
- Australia
| |
Collapse
|
24
|
Jakobsen MD, Sundstrup E, Brandt M, Andersen LL. Factors affecting pain relief in response to physical exercise interventions among healthcare workers. Scand J Med Sci Sports 2016; 27:1854-1863. [PMID: 28028866 DOI: 10.1111/sms.12802] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/18/2016] [Indexed: 12/19/2022]
Abstract
The aim of this study is to identify factors associated with musculo-skeletal pain reduction during workplace-based or home-based physical exercise interventions among healthcare workers. Two hundred female healthcare workers (age: 42.0, BMI: 24.1, average pain intensity: 3.1 on a scale of 0-10) from three hospitals participated. Participants were randomly allocated at the cluster level (18 departments) to 10 weeks of (i) workplace physical exercise (WORK) performed in groups during working hours for 5 × 10 minutes per week and up to five group-based coaching sessions on motivation for regular physical exercise, or (ii) home-based physical exercise (HOME) performed alone during leisure-time for 5 × 10 minutes per week. Linear mixed models accounting for cluster identified factors affecting pain reduction. On average 2.2 (SD: 1.1) and 1.0 (SD: 1.2) training sessions were performed per week in WORK and HOME, respectively. The multi-adjusted analysis showed a significant effect on pain reduction of both training adherence (P=.04) and intervention group (P=.04) with participants in WORK experiencing greater reductions compared with HOME. Obesity at baseline was associated with better outcome. Leisure-time exercise, daily patient transfer, age, and chronic pain did not affect the changes in pain. In conclusion, even when adjusted for training adherence, performing physical exercise at the workplace is more effective than home-based exercise in reducing musculo-skeletal pain in healthcare workers. Noteworthy, obese individuals may especially benefit from physical exercise interventions targeting musculo-skeletal pain.
Collapse
Affiliation(s)
- M D Jakobsen
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - E Sundstrup
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - M Brandt
- National Research Centre for the Working Environment, Copenhagen, Denmark.,Department of Health Science and Technology, Physical Activity and Human Performance group, SMI, Aalborg University, Aalborg, Denmark
| | - L L Andersen
- National Research Centre for the Working Environment, Copenhagen, Denmark.,Department of Health Science and Technology, Physical Activity and Human Performance group, SMI, Aalborg University, Aalborg, Denmark
| |
Collapse
|
25
|
Trautmann M, Wendel V, Prinz D, Primmel B, Willging G, Nagorsen E, Suckert A, Gehm S, Brandt M, Ballay P, Godde B. Not only age but also tactile perception influences the preference for cosmetic creams applied to the forearm. Int J Cosmet Sci 2016; 39:344-350. [PMID: 27864955 DOI: 10.1111/ics.12382] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 10/31/2016] [Indexed: 11/27/2022]
Abstract
OBJECTIVE We aimed to examine whether and how age as well as tactile sensitivity and perception had an impact on how women liked richer and lighter creams. Furthermore, the question arose if age and tactile perception had an influence on the ability to distinguish between the creams and how the ability to distinguish between creams influenced the liking of these creams. METHODS A total of 299 female participants were invited to rate how much they liked four different cosmetic creams applied to their forearms. The creams were based on the same base formula but differed with respect to the texture. In order to arouse the impression of more lightness (quasi-light) or more richness (quasi-rich), polyethylene particles of different sizes were added to the base formula. First of all, the participants were tested for their tactile sensitivity and perception. Tactile sensitivity was tested by Von Frey filaments, tactile spatial perception by the tactile Landolt ring test and the ability to discriminate surface structures by a sandpaper test. Furthermore, the participants rated the creams with respect to the acceptance, the subjective skin feeling after application and performed paired-comparison tests. Analyses of variance and regression analyses were applied to the data. RESULTS In general, participants liked quasi-rich creams less than quasi-light creams. However, older women compared to younger women and women with lower tactile performance in comparison with women with higher tactile performance revealed a weaker influence of cream type-specific acceptance ratings. Further results revealed that young participants perceived the quasi-light creams (with particles of ~50 μm diameter) as soft and quasi-rich creams (with particles of ~100 μm and ~165 μm diameter), as coarse. In contrast, this subjective skin feeling after application in participants at age 50 and older did not differ much. CONCLUSION Age and tactile perceptual abilities have additive effects on the acceptance of creams with different textures when applied to the forearm.
Collapse
Affiliation(s)
- M Trautmann
- Department of Psychology and Methods, Jacobs University Bremen gGmbH, Campus Ring 1, Bremen, 28759, Germany
| | - V Wendel
- BASF Personal Care and Nutrition GmbH, Henkelstraße 67, Duesseldorf-Holthausen, 40589, Germany
| | - D Prinz
- BASF Personal Care and Nutrition GmbH, Henkelstraße 67, Duesseldorf-Holthausen, 40589, Germany
| | - B Primmel
- Beiersdorf AG, Unnastraße 48, Hamburg, 20245, Germany
| | - G Willging
- SAM Sensory and Marketing International GmbH, Oetztaler Strasse 1, München, 81373, Germany
| | - E Nagorsen
- REWE Group Buying GmbH, Domstraße 20, Köln, 50668, Germany
| | - A Suckert
- BASF Personal Care and Nutrition GmbH, Henkelstraße 67, Duesseldorf-Holthausen, 40589, Germany
| | - S Gehm
- Ashland Industries Deutschland GmbH, Paul-Thomas-Straße 56, Düsseldorf, 40599, Germany
| | - M Brandt
- proDERM Institut für Angewandte Dermatologische Forschung GmbH, Kiebitzweg 2, Schenefeld/Hamburg, 22869, Germany
| | - P Ballay
- isi GmbH, Ascherberg 2, Rosdorf (Göttingen), 37124, Germany
| | - B Godde
- Department of Psychology and Methods, Jacobs University Bremen gGmbH, Campus Ring 1, Bremen, 28759, Germany
| |
Collapse
|
26
|
Schmauder S, Brandt M, Werner A. Das CADASIL-Syndrom als Differentialdiagnose eines postpartalen HELLP-Syndroms. Geburtshilfe Frauenheilkd 2016. [DOI: 10.1055/s-0036-1583563] [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
|
27
|
Pirkkalainen JM, Damskägg E, Brandt M, Massel F, Sillanpää MA. Squeezing of Quantum Noise of Motion in a Micromechanical Resonator. Phys Rev Lett 2015; 115:243601. [PMID: 26705631 DOI: 10.1103/physrevlett.115.243601] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Indexed: 06/05/2023]
Abstract
A pair of conjugate observables, such as the quadrature amplitudes of harmonic motion, have fundamental fluctuations that are bound by the Heisenberg uncertainty relation. However, in a squeezed quantum state, fluctuations of a quantity can be reduced below the standard quantum limit, at the cost of increased fluctuations of the conjugate variable. Here we prepare a nearly macroscopic moving body, realized as a micromechanical resonator, in a squeezed quantum state. We obtain squeezing of one quadrature amplitude 1.1±0.4 dB below the standard quantum limit, thus achieving a long-standing goal of obtaining motional squeezing in a macroscopic object.
Collapse
Affiliation(s)
- J-M Pirkkalainen
- Department of Applied Physics, Aalto University, P.O. Box 11100, FI-00076 Aalto, Finland
| | - E Damskägg
- Department of Applied Physics, Aalto University, P.O. Box 11100, FI-00076 Aalto, Finland
| | - M Brandt
- Department of Applied Physics, Aalto University, P.O. Box 11100, FI-00076 Aalto, Finland
| | - F Massel
- Department of Physics, Nanoscience Center, University of Jyväskylä, P.O. Box 35 (YFL), Jyväskylä FI-40014, Finland
| | - M A Sillanpää
- Department of Applied Physics, Aalto University, P.O. Box 11100, FI-00076 Aalto, Finland
| |
Collapse
|
28
|
DiNardo CD, Jabbour E, Ravandi F, Takahashi K, Daver N, Routbort M, Patel KP, Brandt M, Pierce S, Kantarjian H, Garcia-Manero G. IDH1 and IDH2 mutations in myelodysplastic syndromes and role in disease progression. Leukemia 2015; 30:980-4. [PMID: 26228814 PMCID: PMC4733599 DOI: 10.1038/leu.2015.211] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- C D DiNardo
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - E Jabbour
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - F Ravandi
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - K Takahashi
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - N Daver
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - M Routbort
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - K P Patel
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - M Brandt
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - S Pierce
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - H Kantarjian
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - G Garcia-Manero
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| |
Collapse
|
29
|
Crawford GL, Boldison J, Copland DA, Adamson P, Gale D, Brandt M, Nicholson LB, Dick AD. The role of lipoprotein-associated phospholipase A2 in a murine model of experimental autoimmune uveoretinitis. PLoS One 2015; 10:e0122093. [PMID: 25874928 PMCID: PMC4398387 DOI: 10.1371/journal.pone.0122093] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Accepted: 02/21/2015] [Indexed: 12/22/2022] Open
Abstract
Macrophage activation is, in part, regulated via hydrolysis of oxidised low density lipoproteins by Lipoprotein-Associated phospholipase A2 (Lp-PLA2), resulting in increased macrophage migration, pro-inflammatory cytokine release and chemokine expression. In uveitis, tissue damage is mediated as a result of macrophage activation; hence inhibition of Lp-PLA2 may limit macrophage activation and protect the tissue. Utilising Lp-PLA2 gene-deficient (KO) mice and a pharmacological inhibitor of Lp-PLA2 (SB-435495) we aimed to determine the effect of Lp-PLA2 suppression in mediating retinal protection in a model of autoimmune retinal inflammation, experimental autoimmune uveoretinitis (EAU). Following immunisation with RBP-3 (IRBP) 1–20 or 161–180 peptides, clinical disease was monitored and severity assessed, infiltrating leukocytes were enumerated by flow cytometry and tissue destruction quantified by histology. Despite ablation of Lp-PLA2 enzyme activity in Lp-PLA2 KO mice or wild-type mice treated with SB-435495, the number of infiltrating CD45+ cells in the retina was equivalent to control EAU animals, and there was no reduction in disease severity. Thus, despite the reported beneficial effects of therapeutic Lp-PLA2 depletion in a variety of vascular inflammatory conditions, we were unable to attenuate disease, show delayed disease onset or prevent progression of EAU in Lp-PLA2 KO mice. Although EAU exhibits inflammatory vasculopathy there is no overt defect in lipid metabolism and given the lack of effect following Lp-PLA2 suppression, these data support the hypothesis that sub-acute autoimmune inflammatory disease progresses independently of Lp-PLA2 activity.
Collapse
Affiliation(s)
- G. L. Crawford
- Academic unit of Ophthalmology, School of Clinical Sciences, University of Bristol, Bristol, United Kingdom
| | - J. Boldison
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, United Kingdom
| | - D. A. Copland
- Academic unit of Ophthalmology, School of Clinical Sciences, University of Bristol, Bristol, United Kingdom
| | - P. Adamson
- Ophthiris Discovery Performance Unit, GlaxoSmithKline, Stevenage, United Kingdom
| | - D. Gale
- Ophthiris Discovery Performance Unit, GlaxoSmithKline, King of Prussia, Pennsylvania, United States of America
| | - M. Brandt
- Platform Technology Sciences, King of Prussia, Pennsylvania, United States of America
| | - L. B. Nicholson
- Academic unit of Ophthalmology, School of Clinical Sciences, University of Bristol, Bristol, United Kingdom
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, United Kingdom
| | - A. D. Dick
- Academic unit of Ophthalmology, School of Clinical Sciences, University of Bristol, Bristol, United Kingdom
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, United Kingdom
- * E-mail:
| |
Collapse
|
30
|
Kurosch M, Mager R, Gust K, Brandt M, Borgmann H, Haferkamp A. [Therapy of overactive bladder (OAB)]. Urologe A 2015; 54:567-74; quiz 575-6. [PMID: 25758236 DOI: 10.1007/s00120-015-3770-y] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Overactive bladder (OAB) is a symptom complex which is present in approximately 17% of the European population. It is observed in the presence or absence of incontinence (wet or dry) and is associated with a high degree of psychological stress as well as high costs for the healthcare system. Myogenic, urothelial and neurogenic factors lead to frequently unknown changes of muscular, neural and connective tissue. For the definition, etiology and diagnostics of the disease the previous continuing medical education (CME) article "Diagnosis of overactive bladder (OAB)" should be consulted. In recent years some improvements have been made in OAB-related research, in terms of pathophysiological models and new pharmacological approaches with the development of new therapeutic agents. Besides classical substances, recently approved agents are increasingly being used for the therapy of OAB. Furthermore, non-pharmaceutical approaches and surgical techniques still play an important role in the therapy of OAB.
Collapse
Affiliation(s)
- M Kurosch
- Klinik für Urologie und Kinderurologie, Universitätsklinikum Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Deutschland,
| | | | | | | | | | | |
Collapse
|
31
|
Kurosch M, Mager R, Gust K, Brandt M, Borgmann H, Haferkamp A. Diagnostik der überaktiven Blase (OAB). Urologe A 2015; 54:421-7; quiz 428-9. [DOI: 10.1007/s00120-014-3718-7] [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]
|
32
|
Brandt M, Nieuwkamp M, Kerkdijk E, Verschuur E. L28 Huntington Speech Music Therapy. A Therapy Based On The Principles Of The Speech Music Therapy For Aphasia, Adjusted For Patients With Huntington. J Neurol Psychiatry 2014. [DOI: 10.1136/jnnp-2014-309032.265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
33
|
Ravandi F, Arana Yi C, Cortes JE, Levis M, Faderl S, Garcia-Manero G, Jabbour E, Konopleva M, O'Brien S, Estrov Z, Borthakur G, Thomas D, Pierce S, Brandt M, Pratz K, Luthra R, Andreeff M, Kantarjian H. Final report of phase II study of sorafenib, cytarabine and idarubicin for initial therapy in younger patients with acute myeloid leukemia. Leukemia 2014; 28:1543-5. [PMID: 24487412 DOI: 10.1038/leu.2014.54] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- F Ravandi
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - C Arana Yi
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - J E Cortes
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - M Levis
- Division of Hematological Malignancies, Johns Hopkins Sidney Kimmel Cancer Center, Baltimore, MD, USA
| | - S Faderl
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - G Garcia-Manero
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - E Jabbour
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - M Konopleva
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - S O'Brien
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Z Estrov
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - G Borthakur
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - D Thomas
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - S Pierce
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - M Brandt
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - K Pratz
- Division of Hematological Malignancies, Johns Hopkins Sidney Kimmel Cancer Center, Baltimore, MD, USA
| | - R Luthra
- Division of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - M Andreeff
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - H Kantarjian
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| |
Collapse
|
34
|
Van Den Borne P, Haverslag RT, Brandt M, Cheng C, Duckers HJ, Quax PHA, Hoefer IE, Pasterkamp G, De Kleijn DPV. Chemokine (c-x-c motif) ligand 10 deficiency causes impairment of perfusion recovery after local arterial occlusion. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.4367] [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: 11/13/2022] Open
|
35
|
Brandt M, Sun S, Alam N, Bendeich P, Bishop A. Laser cladding repair of turbine blades in power plants: from research to commercialisation. ACTA ACUST UNITED AC 2013. [DOI: 10.1179/174951409x12542264513843] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
|
36
|
Cottam R, Luzin V, Liu Q, Wong YC, Wang J, Brandt M. Investigation into Heat Treatment and Residual Stress in Laser Clad AA7075 Powder on AA7075 Substrate. ACTA ACUST UNITED AC 2013. [DOI: 10.1007/s13632-013-0080-x] [Citation(s) in RCA: 8] [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: 11/24/2022]
|
37
|
Waizy H, Plaass C, Brandt M, Herold D, Stukenborg-Colsman C, Windhagen H, Claassen L. Extraartikuläre Arthrorise nach Grice/Green vs. Kalkaneusverlängerungsosteotomie nach Evans. Orthopäde 2013; 42:409-17. [DOI: 10.1007/s00132-013-2090-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
38
|
Muñoz Ramirez J, Galera Fernandez F, Silván Bueno A, Brandt M, Garcia Fernandez J, Garijo Lopez E. Importance of multinucleation at 2-cell stage: study in a time-lapse incubator. Fertil Steril 2012. [DOI: 10.1016/j.fertnstert.2012.07.623] [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]
|
39
|
Abstract
Theory and experiments indicate that changes in consumer diversity affect benthic community structure and ecosystem functioning. Although the effects of consumer diversity have been tested in the laboratory and the field, little is known about effects of consumer diversity in the subtidal zone, one of the largest marine habitats. We investigated the grazing effects of sea urchins on algal abundance and benthic community structure in a natural subtidal habitat of the Galápagos Islands. Three species of urchins (Eucidaris, Lytechinus, and Tripneustes) were manipulated in inclusion cages following a replacement design with three levels of species richness (one, two, and three species) with all possible two-species urchin combinations. Identity was the main factor accounting for changes in the percentage of substrate grazed and benthic community structure. Two out of the three two-species assemblages grazed more than expected, suggesting a richness effect, but analyses revealed that this increased grazing was due to a sampling effect of the largest and commercially valued urchin species, Tripneustes. Benthic community structure in treatments with Eucidaris, Lytechinus, and Tripneustes alone was significantly different at the end of the experiment, suggesting that resource use differentiation occurred. Communities in Tripneustes enclosures were characterized by abundant crustose coralline algae and grazed substrate, while those without it contained abundant green foliose algae (Ulva sp.). An unexpected emergent property of the system was that the most species-rich urchin assemblage underyielded, grazing less than any other assemblage with Tripneustes, effectively reversing its dominant influence observed in the two-species treatments. While further experiments are needed to discern the mechanisms of underyielding, it may be related to changing interspecific interactions as richness increases from two to three species or to density-dependent Tripneustes grazing. This study highlights the general importance of evaluating consumer richness effects across the entire range of species richness considered, as the performance of the most species-rich consumer assemblage could not be predicted by manipulations of intermediate levels of consumer species richness.
Collapse
Affiliation(s)
- Margarita Brandt
- Department of Ecology and Evolutionary Biology, Brown University, 80 Waterman Street, Box G-W, Providence, Rhode Island 02912, USA.
| | | | | |
Collapse
|
40
|
Garey C, Schropp K, Talboy G, McDonell J, Kurylo M, Wilson K, Keeling M, Nazir N, Brandt M, Moncure M. Stress In Surgery Residents: A Pilot Study For Evaluation And Intervention. J Surg Res 2011. [DOI: 10.1016/j.jss.2010.11.839] [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: 10/18/2022]
|
41
|
Borthakur G, Jabbour E, Wang X, Cortes JE, Ravandi Kashani F, Kadia TM, Bass J, Brandt M, Kantarjian H. Effect of front-line therapy with fludarabine, cytarabine, filgrastim, and gemtuzumab ozogamicin (FLAG-GO) on outcome in core-binding factor associated acute myelogenous leukemia (CBF-AML). J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6552] [Citation(s) in RCA: 3] [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: 11/20/2022] Open
|
42
|
Kadia TM, Ravandi Kashani F, O'Brien SM, Cortes JE, Jabbour E, Borthakur G, Faderl S, Pierce S, Brandt M, Kantarjian H. Evaluation of efficacy and mortality in elderly patients (pts) (70 years [yrs] or older) with acute myeloid leukemia (AML) treated with intensive chemotherapy (IC). J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6529] [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: 11/20/2022] Open
|
43
|
Al-Kali A, Konoplev SN, Lin E, Kadia TM, Faderl S, Ravandi Kashani F, Ayoubi M, Brandt M, Kantarjian H, Borthakur G. Hypocellular acute myeloid leukemia: Better or worse prognosis. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6561] [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: 11/20/2022] Open
|
44
|
Faderl S, Ravandi Kashani F, Borthakur G, Kadia TM, Jabbour E, Garcia-Manero G, Brandt M, Pierce S, Kantarjian H. Analysis of survival of older patients with frontline AML treated with clofarabine with or without low-dose cytarabine or intermediate-dose cytarabine: A matched cohort comparison. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6551] [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: 11/20/2022] Open
|
45
|
Brandt M, Bromberg Gedan K, Garcia EA. Disturbance Type Affects the Distribution of Mobile Invertebrates in a High Salt Marsh Community. Northeast Nat (Steuben) 2010. [DOI: 10.1656/045.017.0108] [Citation(s) in RCA: 3] [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: 11/20/2022]
|
46
|
Brandt M, Haeussermann A, Hartung E. Invited review: Technical solutions for analysis of milk constituents and abnormal milk. J Dairy Sci 2010; 93:427-36. [DOI: 10.3168/jds.2009-2565] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2009] [Accepted: 10/19/2009] [Indexed: 11/19/2022]
|
47
|
Witman JD, Brandt M, Smith F. Coupling between subtidal prey and consumers along a mesoscale upwelling gradient in the Galápagos Islands. ECOL MONOGR 2010. [DOI: 10.1890/08-1922.1] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
48
|
|
49
|
|
50
|
|