1
|
Eylon S, Kornitzer E, Wever C, Rigbi A, Weiss PL, Meyer S. Reducing fracture incidence in children with osteogenesis imperfecta: contribution of orthotics to bisphosphonates treatment. Disabil Rehabil 2024; 46:1416-1421. [PMID: 37067232 DOI: 10.1080/09638288.2023.2198259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 03/25/2023] [Indexed: 04/18/2023]
Abstract
PURPOSE To determine whether there was a reduction in fracture incidence amongst children with OI who were treated with both bisphosphonates and orthoses. OBJECTIVE Was there an additional reduction in fracture incidence amongst children with Osteogenesis Imperfecta (OI) treated with both bisphosphonates and Hip-Knee-Ankle-Foot-Orthosis (HKAFO)? MATERIALS AND METHODS Of the 129 OI patients treated from 1990 to 2017, retrospective data from 48 patients who participated in the bisphosphonates-orthosis regime were analyzed including the incidence of fractures and modalities of fracture treatment. RESULTS Bisphosphonates usage was more frequent than bracing and there were more positive changes (smaller or equal number of fractures each year) than negative changes (more fractures each year); negative changes were scarce, explained by non-compliance with the use of bracing. Poisson regression models were significant for positive changes, whereas the interaction between them was borderline significant. The main finding is that the association between bisphosphonates usage and the number of positive changes was stronger among the patients who used braces more frequently and weaker among patients who used bracing less frequently. CONCLUSIONS Bracing of OI patients has an additive effect on bisphosphonate treatment in fracture prevention which should lead to the reconsideration of a hybrid approach to OI management.
Collapse
Affiliation(s)
- S Eylon
- ALYN Pediatric and Adolescent Rehabilitation Center, Jerusalem, Israel
| | - E Kornitzer
- ALYN Pediatric and Adolescent Rehabilitation Center, Jerusalem, Israel
| | - C Wever
- ALYN Pediatric and Adolescent Rehabilitation Center, Jerusalem, Israel
| | - A Rigbi
- Beit Berl College, Faculty of Education, Kfar-Saba, Israel
| | - P L Weiss
- ALYN Pediatric and Adolescent Rehabilitation Center, Jerusalem, Israel
- Department of Occupational Therapy, University of Haifa, Haifa, Israel
| | - S Meyer
- ALYN Pediatric and Adolescent Rehabilitation Center, Jerusalem, Israel
| |
Collapse
|
2
|
Gavín-Centol MP, Serrano-Carnero D, Montserrat M, Meyer S, Scheu S, Kundel D, Fliessbach A, Truu J, Birkhofer K, Sánchez-Moreno S, Moya-Laraño J. Severe drought and conventional farming affect detritivore feeding activity and its vertical distribution. Basic Appl Ecol 2023. [DOI: 10.1016/j.baae.2023.03.006] [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: 04/05/2023]
|
3
|
Alam S, Meyer S, Kuo L, Hu Y, Lu W, Yorke E, Rimner A, Cervino L, Zhang P. Patient-Specific Quality Assurance of Deformable Image Registrations Using Atlas for Adaptive Radiotherapy of Lung Cancer. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.2253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
4
|
Kates R, Sprecher B, Meyer S, Tonk C, Schinköthe T, Harbeck N, Schmidt A. Trained Artificial Intelligence (AI) for Predicting Therapy Discontinuation Based on Patient Observations in Advanced Breast Cancer. Eur J Cancer 2022. [DOI: 10.1016/s0959-8049(22)01543-x] [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: 11/19/2022]
|
5
|
Wada Y, Jensen C, Meyer S, Yamamoto Y, Honda H. Effects of interleukin-6 inhibition with ziltivekimab in patients at high risk of atherosclerotic events in Japan: results from the phase 2 RESCUE-2 trial. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2618] [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
Introduction
In the US phase 2 RESCUE trial, ziltivekimab, a fully human monoclonal antibody against the ligand of the pro-inflammatory cytokine interleukin-6, was shown to reduce biomarkers of inflammation in patients with chronic kidney disease (CKD) and elevated levels of high-sensitivity C-reactive protein (hsCRP), a marker of inflammation and cardiac risk.1 Here, we present outcomes from the phase 2 RESCUE-2 trial of ziltivekimab in a patient population from Japan.
Purpose
To evaluate the efficacy and safety of ziltivekimab 15 mg and 30 mg compared with placebo in Japanese patients with non-dialysis-dependent CKD (NDD-CKD).
Methods
We conducted a randomized, double-blind, placebo-controlled trial in 36 patients aged ≥20 years with stage 3–5 NDD-CKD and hsCRP ≥2 mg/L. Patients were randomly assigned to receive subcutaneous ziltivekimab 15 mg (n=11) or 30 mg (n=12), or placebo (n=13) at weeks 0, 4 and 8. The primary endpoint was percentage change in hsCRP levels from baseline to end of treatment (EOT) (average of week 10 and week 12 values); secondary endpoints included percentage change from baseline to EOT in levels of fibrinogen, serum amyloid A (SAA), N-terminal pro B-type natriuretic peptide (NT-proBNP) and lipids. Analysis of endpoints was performed using Wilcoxon two-sample test; differences between treatment groups were calculated using the Hodges–Lehmann estimator.
Results
Baseline characteristics are shown in the Table. At EOT, median hsCRP levels were reduced by 96% and 93% in the ziltivekimab 15 mg and 30 mg groups, respectively, compared with 27% for placebo (both p<0.001 vs placebo). At both doses, ziltivekimab provided rapid and sustained suppression of hsCRP over the 12-week treatment period (Figure). Statistically significant reductions in levels of the inflammatory markers SAA (15 mg: 71%; 30 mg: 58%; placebo: 30%; both p<0.01 vs placebo) and fibrinogen (38%; 34%; 2%; both p<0.0001 vs placebo) were also observed. Ziltivekimab was well tolerated, did not result in persistent neutropenia or thrombocytopenia, and had minimal effect on liver enzyme levels. There was a non-significant increase in low-density lipoprotein levels and a neutral effect on high-density lipoprotein levels. There was a limited, but statistically significant (p<0.05 vs placebo) increase in triglycerides, whereby levels increased in some patients and decreased in others.
Conclusion
Ziltivekimab effectively reduced inflammatory biomarkers associated with atherosclerosis in patients from Japan with CKD and residual inflammatory risk as measured by hsCRP. A significant reduction of more than 90% in hsCRP levels for both doses of ziltivekimab was demonstrated, with a safety profile similar to placebo. Overall, the results of the RESCUE-2 trial in Japan are consistent with the efficacy and safety results of the US-based RESCUE trial.
Funding Acknowledgement
Type of funding sources: Private company. Main funding source(s): This study was funded by Novo Nordisk A/S. Medical writing support was provided by Johanna Scheinost PhD, PharmaGenesis Oxford Central, Oxford, UK, with funding from Novo Nordisk A/S.
Collapse
Affiliation(s)
- Y Wada
- Showa University School of Medicine , Tokyo , Japan
| | - C Jensen
- Novo Nordisk A/S , Søborg , Denmark
| | - S Meyer
- Novo Nordisk A/S , Søborg , Denmark
| | | | - H Honda
- Showa University School of Medicine , Tokyo , Japan
| |
Collapse
|
6
|
Adelung S, Dietrich RU, Habermeyer F, Meyer S, Raab M, Weyand J. Techno‐Economic and Environmental Assessment of Multiple Energy Transition Options – Methodology and Results. CHEM-ING-TECH 2022. [DOI: 10.1002/cite.202255114] [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: 11/07/2022]
Affiliation(s)
- S. Adelung
- German Aerospace Center (DLR e.V.) Institute of Engineering Thermodynamics (TT) Pfaffenwaldring 38–40 70569 Stuttgart Germany
| | - R.-U. Dietrich
- German Aerospace Center (DLR e.V.) Institute of Engineering Thermodynamics (TT) Pfaffenwaldring 38–40 70569 Stuttgart Germany
| | - F. Habermeyer
- German Aerospace Center (DLR e.V.) Institute of Engineering Thermodynamics (TT) Pfaffenwaldring 38–40 70569 Stuttgart Germany
| | - S. Meyer
- German Aerospace Center (DLR e.V.) Institute of Engineering Thermodynamics (TT) Pfaffenwaldring 38–40 70569 Stuttgart Germany
| | - M. Raab
- German Aerospace Center (DLR e.V.) Institute of Engineering Thermodynamics (TT) Pfaffenwaldring 38–40 70569 Stuttgart Germany
| | - J. Weyand
- German Aerospace Center (DLR e.V.) Institute of Engineering Thermodynamics (TT) Pfaffenwaldring 38–40 70569 Stuttgart Germany
| |
Collapse
|
7
|
Toschke Y, Lusmoeller J, Otte L, Schmidt J, Meyer S, Tessmer A, Brockmann C, Ahuis M, Hüer E, Kirberger C, Berben D. Distributed LoRa based CO 2 monitoring network - A standalone open source system for contagion prevention by controlled ventilation. HardwareX 2022; 11:e00261. [PMID: 35036664 PMCID: PMC8744306 DOI: 10.1016/j.ohx.2022.e00261] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In the face of a global pandemic, such as that caused by the SARS-CoV-2 virus, the prevention of new infections is essential to stop the spread and ultimately return to normality. In addition to wearing masks and maintaining safe distances, regular ventilation in enclosed spaces where several people are gathered has proven to be an effective protective measure as advised by the World Health Organization. Additionally, as has been shown in a recent study of other airborne viruses, there is a strong correlation between the CO2level and aerosol content in a confined space under the assumption humans are the only CO2source. This can be exploited by means of a low-cost infrared CO2sensor to indirectly monitor the aerosol content and to provide targeted ventilation if predefined thresholds are exceeded. The distributed CO2monitoring network presented in this paper extends that idea and provides an inexpensive, comprehensive and modular monitoring network based on readily available components and 3D printing. By using a long-range communication link (LoRa) to centrally collect the real-time CO2concentration in a multitude of rooms, this network is particularly suitable for larger building complexes such as kindergartens, schools and universities without requiring partial or even full WLAN coverage.
Collapse
Affiliation(s)
- Yannic Toschke
- Department of Physics, Osnabrueck University, Barbarastrasse 7, Osnabrueck D-49076, Germany
| | - Janet Lusmoeller
- Department of Chemistry Education, Osnabrueck University, Barbarastrasse 7, Osnabrueck D-49076, Germany
- Fachhochschule Suedwestfalen, Fachbereich Elektrotechnik und Informationstechnik, Haldener Strasse 182, D-58095 Hagen, Germany
| | - Lars Otte
- Department of Chemistry Education, Osnabrueck University, Barbarastrasse 7, Osnabrueck D-49076, Germany
- Fachhochschule Suedwestfalen, Fachbereich Elektrotechnik und Informationstechnik, Haldener Strasse 182, D-58095 Hagen, Germany
| | - Johann Schmidt
- Department of Chemistry Education, Osnabrueck University, Barbarastrasse 7, Osnabrueck D-49076, Germany
- Fachhochschule Suedwestfalen, Fachbereich Elektrotechnik und Informationstechnik, Haldener Strasse 182, D-58095 Hagen, Germany
| | - Svenja Meyer
- Fachhochschule Suedwestfalen, Fachbereich Elektrotechnik und Informationstechnik, Haldener Strasse 182, D-58095 Hagen, Germany
| | - Alexander Tessmer
- Institute of Computer Science, Osnabrueck University, Friedrich-Janssen-Str. 1, Osnabrueck D-49076, Germany
| | - Christian Brockmann
- Evangelisches Gymnasium Nordhorn, Bernhard-Niehues-Straße 51, D-48529 Nordhorn, Germany
| | - Milena Ahuis
- Evangelisches Gymnasium Nordhorn, Bernhard-Niehues-Straße 51, D-48529 Nordhorn, Germany
| | - Emma Hüer
- Evangelisches Gymnasium Nordhorn, Bernhard-Niehues-Straße 51, D-48529 Nordhorn, Germany
| | - Christian Kirberger
- Evangelisches Gymnasium Nordhorn, Bernhard-Niehues-Straße 51, D-48529 Nordhorn, Germany
| | - Dirk Berben
- Fachhochschule Suedwestfalen, Fachbereich Elektrotechnik und Informationstechnik, Haldener Strasse 182, D-58095 Hagen, Germany
| |
Collapse
|
8
|
Meyer S, Kundel D, Birkhofer K, Fliessbach A, Scheu S. Trophic niche but not abundance of Collembola and Oribatida changes with drought and farming system. PeerJ 2022; 10:e12777. [PMID: 35070508 PMCID: PMC8761369 DOI: 10.7717/peerj.12777] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 12/21/2021] [Indexed: 01/10/2023] Open
Abstract
Higher frequencies of summer droughts are predicted to change soil conditions in the future affecting soil fauna communities and their biotic interactions. In agroecosystems drought effects on soil biota may be modulated by different management practices that alter the availability of different food resources. Recent studies on the effect of drought on soil microarthropods focused on measures of abundance and diversity. We here additionally investigated shifts in trophic niches of Collembola and Oribatida as indicated by stable isotope analysis (13C and 15N). We simulated short-term summer drought by excluding 65% of the ambient precipitation in conventionally and organically managed winter wheat fields on the DOK trial in Switzerland. Stable isotope values suggest that plant litter and root exudates were the most important resources for Collembola (Isotoma caerulea, Isotomurus maculatus and Orchesella villosa) and older plant material and microorganisms for Oribatida (Scheloribates laevigatus and Tectocepheus sarekensis). Drought treatment and farming systems did not affect abundances of the studied species. However, isotope values of some species increased in organically managed fields indicating a higher proportion of microorganisms in their diet. Trophic niche size, a measure of both isotope values combined, decreased with drought and under organic farming in some species presumably due to favored use of plants as basal resource instead of algae and microorganisms. Overall, our results suggest that the flexible usage of resources may buffer effects of drought and management practices on the abundance of microarthropods in agricultural systems.
Collapse
Affiliation(s)
- Svenja Meyer
- Animal Ecology, J.F. Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Germany
| | - Dominika Kundel
- Ecology, Department of Biology, University of Konstanz, Konstanz, Germany,Department of Soil Sciences, Research Institute of Organic Agriculture (FiBL), Frick, Switzerland
| | - Klaus Birkhofer
- Department of Ecology, Brandenburg University of Technology, Cottbus, Germany
| | - Andreas Fliessbach
- Department of Soil Sciences, Research Institute of Organic Agriculture (FiBL), Frick, Switzerland
| | - Stefan Scheu
- Animal Ecology, J.F. Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Germany,Centre of Biodiversity and Sustainable Land Use, University of Göttingen, Göttingen, Germany
| |
Collapse
|
9
|
Birkhofer K, Fliessbach A, Gavín-Centol MP, Hedlund K, Ingimarsdóttir M, Jørgensen HB, Kozjek K, Meyer S, Montserrat M, Moreno SS, Laraño JM, Scheu S, Serrano-Carnero D, Truu J, Kundel D. Conventional agriculture and not drought alters relationships between soil biota and functions. Sci Rep 2021; 11:23975. [PMID: 34907218 PMCID: PMC8671559 DOI: 10.1038/s41598-021-03276-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 11/22/2021] [Indexed: 12/02/2022] Open
Abstract
Soil biodiversity constitutes the biological pillars of ecosystem services provided by soils worldwide. Soil life is threatened by intense agricultural management and shifts in climatic conditions as two important global change drivers which are not often jointly studied under field conditions. We addressed the effects of experimental short-term drought over the wheat growing season on soil organisms and ecosystem functions under organic and conventional farming in a Swiss long term trial. Our results suggest that activity and community metrics are suitable indicators for drought stress while microbial communities primarily responded to agricultural practices. Importantly, we found a significant loss of multiple pairwise positive and negative relationships between soil biota and process-related variables in response to conventional farming, but not in response to experimental drought. These results suggest a considerable weakening of the contribution of soil biota to ecosystem functions under long-term conventional agriculture. Independent of the farming system, experimental and seasonal (ambient) drought conditions directly affected soil biota and activity. A higher soil water content during early and intermediate stages of the growing season and a high number of significant relationships between soil biota to ecosystem functions suggest that organic farming provides a buffer against drought effects.
Collapse
Affiliation(s)
- Klaus Birkhofer
- Department of Ecology, Brandenburg University of Technology Cottbus-Senftenberg, Konrad-Wachsmann-Allee 6, 03046, Cottbus, Germany.
| | - Andreas Fliessbach
- Department of Soil Sciences, Research Institute of Organic Agriculture (FiBL), 5070, Frick, Switzerland
| | | | | | | | | | - Katja Kozjek
- Department of Biology, Lund University, 22362, Lund, Sweden
| | - Svenja Meyer
- J.F. Blumenbach Institute of Zoology and Anthropology, Animal Ecology, University of Göttingen, 37073, Göttingen, Germany
| | - Marta Montserrat
- Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora" - Universidad de Málaga- Consejo Superior de Investigaciones Científicas, Málaga, Spain
| | - Sara Sánchez Moreno
- Department of Environment and Agronomy, National Center Institute for Agricultural and Food Research and Technology, Madrid, Spain
| | - Jordi Moya Laraño
- Estación Experimental de Zonas Áridas, EEZA-CSIC, 04120, Almería, Spain
| | - Stefan Scheu
- J.F. Blumenbach Institute of Zoology and Anthropology, Animal Ecology, University of Göttingen, 37073, Göttingen, Germany
- Centre of Biodiversity and Sustainable Land Use, University of Göttingen, 37077, Göttingen, Germany
| | - Diego Serrano-Carnero
- Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora" - Universidad de Málaga- Consejo Superior de Investigaciones Científicas, Málaga, Spain
| | - Jaak Truu
- Institute of Molecular and Cell Biology, University of Tartu, 51010, Tartu, Estonia
| | - Dominika Kundel
- Department of Soil Sciences, Research Institute of Organic Agriculture (FiBL), 5070, Frick, Switzerland
- Max Planck Institute of Animal Behavior, 78315, Radolfzell, Germany
- Department of Biology, University of Konstanz, 78464, Konstanz, Germany
| |
Collapse
|
10
|
Schnürle K, Bortfeldt J, Englbrecht F, Gianoli C, Hartmann J, Hofverberg P, Meyer S, Vidal M, Hérault J, Schreiber J, Parodi K, Würl M. Development of integration mode proton imaging with a single CMOS detector for a small animal irradiation platform. Phys Med 2021. [DOI: 10.1016/s1120-1797(22)00094-1] [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: 11/30/2022] Open
|
11
|
Opdensteinen P, Meyer S, Buyel JF. Nicotiana spp. for the Expression and Purification of Functional IgG3 Antibodies Directed Against the Staphylococcus aureus Alpha Toxin. Front Chem Eng 2021. [DOI: 10.3389/fceng.2021.737010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Immunoglobulin subclass IgG1 is bound and neutralized effectively by Staphylococcus aureus protein A, allowing the bacterium to evade the host’s adaptive immune response. In contrast, the IgG3 subclass is not bound by protein A and can be used to treat S. aureus infections, including drug-resistant strains such as methicillin-resistant Staphylococcus aureus (MRSA). However, the yields of recombinant IgG3 are generally low because this subclass is prone to degradation, and recovery is hindered by the inability to use protein A as an affinity ligand for antibody purification. Here, we investigated plants (Nicotiana spp.) as an alternative to microbes and mammalian cell cultures for the production of an IgG3 antibody specific for the S. aureus alpha toxin. We targeted recombinant IgG3 to different subcellular compartments and tested different chromatography conditions to improve recovery and purification. Finally, we tested the antigen-binding capacity of the purified antibodies. The highest IgG3 levels in planta (>130 mg kg−1 wet biomass) were achieved by targeting the endoplasmic reticulum or apoplast. Although the purity of IgG3 exceeded 95% following protein G chromatography, product recovery requires further improvement. Importantly, the binding affinity of the purified antibodies was in the nanomolar range and thus comparable to previous studies using murine hybridoma cells as the production system.
Collapse
|
12
|
Meyer S, Wagner G, Cepni A, Ledoux T, Walsh D, Johnston C, Arlinghaus K. Lunch Skipping Behaviors Among Black and Hispanic Adolescents Who Receive Free School Meals. J Acad Nutr Diet 2021. [DOI: 10.1016/j.jand.2021.08.089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
13
|
Meyer S, Kundel D, Birkhofer K, Fliessbach A, Scheu S. Soil microarthropods respond differently to simulated drought in organic and conventional farming systems. Ecol Evol 2021; 11:10369-10380. [PMID: 34367581 PMCID: PMC8328414 DOI: 10.1002/ece3.7839] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 06/04/2021] [Accepted: 06/08/2021] [Indexed: 11/10/2022] Open
Abstract
In Central Europe, summer droughts are increasing in frequency which threatens production and biodiversity in agroecosystems. The potential of different farming systems to mitigate detrimental drought effects on soil animals is largely unknown. We investigated the effects of simulated drought on the abundance and community composition of soil microarthropods (Collembola and Oribatida and Meso-, Pro-, and Astigmata) in winter wheat fields under long-term conventional and organic farming in the DOK trial, Switzerland. We simulated drought by excluding 65% of the ambient precipitation during the wheat-growing season from March to June 2017. The abundance of Collembola and Oribatida declined more consistently in conventionally managed fields compared to organically managed fields under simulated drought. The abundance of Collembola as well as Meso-, Pro- and Astigmata, but not the abundance of Oribatida, increased in deeper soil layers due to simulated drought, suggesting vertical migration as a drought avoidance strategy. The species composition of Oribatida communities, but not of Collembola communities, differed significantly between drought treatments and between farming systems. Soil carbon content was a major factor structuring Oribatida communities. Our results suggest that organic farming buffers negative effects of drought on soil microarthropods, presumably due to higher soil carbon content and associated higher soil moisture and improved soil structure. This potential of organic farming systems to mitigate consequences of future droughts on soil biodiversity is promising and needs further exploration across larger climatic and spatial scales and should be extended to other groups of soil biota.
Collapse
Affiliation(s)
- Svenja Meyer
- Animal EcologyJ.F. Blumenbach Institute for Zoology and AnthropologyUniversity of GöttingenGöttingenGermany
| | - Dominika Kundel
- EcologyDepartment of BiologyUniversity of KonstanzKonstanzGermany
- Department of Soil SciencesResearch Institute of Organic Agriculture (FiBL)FrickSwitzerland
| | - Klaus Birkhofer
- Department of EcologyBrandenburg University of TechnologyCottbusGermany
| | - Andreas Fliessbach
- Department of Soil SciencesResearch Institute of Organic Agriculture (FiBL)FrickSwitzerland
| | - Stefan Scheu
- Animal EcologyJ.F. Blumenbach Institute for Zoology and AnthropologyUniversity of GöttingenGöttingenGermany
- Centre of Biodiversity and Sustainable Land UseUniversity of GöttingenGöttingenGermany
| |
Collapse
|
14
|
Morschel L, Chitrapu K, Garonne V, Litvintsev D, Meyer S, Millar P, Mkrtchyan T, Rossi A, Sahakyan M. Improving Performance of Tape Restore Request Scheduling in the Storage System dCache. EPJ Web Conf 2021. [DOI: 10.1051/epjconf/202125102016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Given the anticipated increase in the amount of scientific data, it is widely accepted that primarily disk based storage will become prohibitively expensive. Tape based storage, on the other hand, provides a viable and affordable solution for the ever increasing demand for storage space. Coupled with a disk caching layer that temporarily holds a small fraction of the total data volume to allow for low latency access, it turns tape based systems into active archival storage (write once, read many) that imposes additional demands on data flow optimization compared to traditional backup setups (write once, read never). In order to preserve the lifetime of tapes and minimize the inherently higher access latency, different tape usage strategies are being evaluated. As an important disk storage system for scientific data that transparently handles tape access, dCache is making efforts to evaluate its recall optimization potential and is introducing a proof-of-concept, high-level stage request scheduling component within its SRM implementation.
Collapse
|
15
|
Rossi A, Chitrapu K, Garonne V, Litvintsev D, Meyer S, Millar P, Mkrtchyan T, Morschel L, Sahakyan M. dCache: from Resilience to Quality of Service. EPJ Web Conf 2021. [DOI: 10.1051/epjconf/202125102043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A major goal of future dCache development will be to allow users to define file Quality of Service (QoS) in a more flexible way than currently available. This will mean implementing what might be called a QoS rule engine responsible for registering and managing time-bound QoS transitions for files or storage units. In anticipation of this extension to existing dCache capabilities, the Resilience service, which maintains on-disk replica state, needs to undergo both structural modification and generalization. This paper describes ongoing work to transform Resilience into the new architecture which will eventually support a more broadly defined file QoS.
Collapse
|
16
|
Mkrtchyan T, Chitrapu K, Garonne V, Litvintsev D, Meyer S, Millar P, Morschel L, Rossi A, Sahakyan M. dCache: Inter-disciplinary storage system. EPJ Web Conf 2021. [DOI: 10.1051/epjconf/202125102010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The dCache project provides open-source software deployed internationally to satisfy ever more demanding storage requirements. Its multifaceted approach provides an integrated way of supporting different use-cases with the same storage, from high throughput data ingest, data sharing over wide area networks, efficient access from HPC clusters and long term data persistence on a tertiary storage. Though it was originally developed for the HEP experiments, today it is used by various scientific communities, including astrophysics, biomed, life science, which have their specific requirements. In this paper we describe some of the new requirements as well as demonstrate how dCache developers are addressing them.
Collapse
|
17
|
Affiliation(s)
- O. De Witte
- Departments of Neurosurgery, Hôpital Erasme-Ulb, Brussels, Belgium
| | - N. Massager
- Departments of Neurosurgery, Hôpital Erasme-Ulb, Brussels, Belgium
| | - I. Salmon
- Departments of Neuro-Pathology, Hôpital Erasme-Ulb, Brussels, Belgium
| | - S. Meyer
- Department of Oncology, Hôpital de la Ville, Esch-sur-Alzette
| | - G. Dooms
- Department of Radiology, Centre Hospitalier de Luxembourg, Grand Duché de Luxembourg
| | - J. Brotchi
- Departments of Neurosurgery, Hôpital Erasme-Ulb, Brussels, Belgium
| |
Collapse
|
18
|
Wienbergen H, Fach A, Meyer S, Schmucker J, Osteresch R, Michel S, Retzlaff T, Steckenborn M, Elsaesser A, Langer H, Hambrecht R. Long-term effects of an intensive prevention program (IPP) after acute myocardial infarction – the IPP Follow-up and Prevention Boost Trial. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2961] [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
Background
The effects of an intensive prevention program (IPP) for 12 months following 3-week rehabilitation after myocardial infarction (MI) have been proven by the randomized IPP trial. The present study investigates if the effects of IPP persist one year after termination of the program and if a reintervention after >24 months (“prevention boost”) is effective.
Methods
In the IPP trial patients were recruited during hospitalization for acute MI and randomly assigned to IPP versus usual care (UC) one month after discharge (after 3-week rehabilitation). IPP was coordinated by non-physician prevention assistants and included intensive group education sessions, telephone calls, telemetric and clinical control of risk factors. Primary study endpoint was the IPP Prevention Score, a sum score evaluating six major risk factors. The score ranges from 0 to 15 points, with a score of 15 points indicating best risk factor control.
In the present study the effects of IPP were investigated after 24 months – one year after termination of the program. Thereafter, patients of the IPP study arm with at least one insufficiently controlled risk factor were randomly assigned to a 2-months reintervention (“prevention boost”) vs. no reintervention.
Results
At long-term follow-up after 24 months, 129 patients of the IPP study arm were compared to 136 patients of the UC study arm. IPP was associated with a significantly better risk factor control compared to UC at 24 months (IPP Prevention Score 10.9±2.3 points in the IPP group vs. 9.4±2.3 points in the UC group, p<0.01). However, in the IPP group a decrease of risk factor control was observed at the 24-months visit compared to the 12-months visit at the end of the prevention program (IPP Prevention Score 10.9±2.3 points at 24 months vs. 11.6±2.2 points at 12 months, p<0.05, Figure 1).
A 2-months reintervention (“prevention boost”) was effective to improve risk factor control during long-term course: IPP Prevention Score increased from 10.5±2.1 points to 10.7±1.9 points in the reintervention group, while it decreased from 10.5±2.1 points to 9.7±2.1 points in the group without reintervention (p<0.05 between the groups, Figure 1).
Conclusions
IPP was associated with a better risk factor control compared to UC during 24 months; however, a deterioration of risk factors after termination of IPP suggests that even a 12-months prevention program is not long enough. The effects of a short reintervention after >24 months (“prevention boost”) indicate the need for prevention concepts that are based on repetitive personal contacts during long-term course after coronary events.
Figure 1
Funding Acknowledgement
Type of funding source: Foundation. Main funding source(s): Stiftung Bremer Herzen (Bremen Heart Foundation)
Collapse
Affiliation(s)
- H Wienbergen
- Hospital Links der Weser, Bremen Institute for Heart and Circulation Research, Bremen, Germany
| | - A Fach
- Hospital Links der Weser, Bremen Institute for Heart and Circulation Research, Bremen, Germany
| | - S Meyer
- Heart Center Oldenburg, Oldenburg, Germany
| | - J Schmucker
- Hospital Links der Weser, Bremen Institute for Heart and Circulation Research, Bremen, Germany
| | - R Osteresch
- Hospital Links der Weser, Bremen Institute for Heart and Circulation Research, Bremen, Germany
| | - S Michel
- Hospital Links der Weser, Bremen Institute for Heart and Circulation Research, Bremen, Germany
| | - T Retzlaff
- Hospital Links der Weser, Bremen Institute for Heart and Circulation Research, Bremen, Germany
| | - M Steckenborn
- Hospital Links der Weser, Bremen Institute for Heart and Circulation Research, Bremen, Germany
| | | | - H Langer
- University Heart Center, Luebeck, Germany
| | - R Hambrecht
- Hospital Links der Weser, Bremen Institute for Heart and Circulation Research, Bremen, Germany
| |
Collapse
|
19
|
Meyer S, Esber A, Runnebaum I, Mothes A. Laser in der Urogynäkologie – Vorläufige Daten einer prospektive Beobachtungsstudie zum dualen Er:YAG thermisch – ablativen Laser Protokoll. Geburtshilfe Frauenheilkd 2020. [DOI: 10.1055/s-0040-1718056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
| | - A. Esber
- St. Georg Klinikum Eisenach, Frauenklinik
| | | | - A.R. Mothes
- Universitätsfrauenklinik
- St. Georg Klinikum Eisenach, Frauenklinik
| |
Collapse
|
20
|
Fisher J, Barbor N, Coughlin K, McLaughlin K, Meyer S, Melnick L, Gallant E, Dubiel B, Synek C, Evers L, DeChicco R. Dietetic Interns Competency to Diagnosing Malnutrition. J Acad Nutr Diet 2020. [DOI: 10.1016/j.jand.2020.06.212] [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: 11/30/2022]
|
21
|
Meyer S, Zimmer A, Hamza A, Poryo M. Is there a role for cerebral ultrasonography in near-term/term neonates following assisted vaginal delivery? A prospective, single-center study. Early Hum Dev 2020; 147:105101. [PMID: 32518027 DOI: 10.1016/j.earlhumdev.2020.105101] [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] [Received: 05/29/2020] [Accepted: 06/02/2020] [Indexed: 11/29/2022]
Affiliation(s)
- S Meyer
- Department of Pediatrics and Neonatology, Saarland University Medical Center, Homburg, Germany.
| | - A Zimmer
- Medical School, Saarland University Medical Center, Homburg, Germany
| | - A Hamza
- Department of Pediatric Cardiology, Saarland University Medical Center, Homburg, Germany
| | - M Poryo
- Department of Gynecology and Obstetrics, Saarland University Medical Center, Homburg, Germany
| |
Collapse
|
22
|
Erb U, Hikel J, Meyer S, Ishikawa H, Worst TS, Nitschke K, Nuhn P, Porubsky S, Weiss C, Schroten H, Adam R, Karremann M. The Impact of Small Extracellular Vesicles on Lymphoblast Trafficking across the Blood-Cerebrospinal Fluid Barrier In Vitro. Int J Mol Sci 2020; 21:ijms21155491. [PMID: 32752027 PMCID: PMC7432056 DOI: 10.3390/ijms21155491] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/22/2020] [Accepted: 07/28/2020] [Indexed: 02/07/2023] Open
Abstract
Central nervous System (CNS) disease in pediatric acute lymphoblastic leukemia (ALL) is a major concern, but still, cellular mechanisms of CNS infiltration are elusive. The choroid plexus (CP) is a potential entry site, and, to some extent, invasion resembles CNS homing of lymphocytes during healthy state. Given exosomes may precondition target tissue, the present work aims to investigate if leukemia-derived exosomes contribute to a permissive phenotype of the blood-cerebrospinal fluid barrier (BCSFB). Leukemia-derived exosomes were isolated by ultracentrifugation from the cell lines SD-1, Nalm-6, and P12-Ichikawa (P12). Adhesion and uptake to CP epithelial cells and the significance on subsequent ALL transmigration across the barrier was studied in a human BCSFB in vitro model based on the HiBCPP cell line. The various cell lines markedly differed regarding exosome uptake to HiBCPP and biological significance. SD-1-derived exosomes associated to target cells unspecifically without detectable cellular effects. Whereas Nalm-6 and P12-derived exosomes incorporated by dynamin-dependent endocytosis, uptake in the latter could be diminished by integrin blocking. In addition, only P12-derived exosomes led to facilitated transmigration of the parental leukemia cells. In conclusion, we provide evidence that, to a varying extent, leukemia-derived exosomes may facilitate CNS invasion of ALL across the BCSFB without destruction of the barrier integrity.
Collapse
Affiliation(s)
- Ulrike Erb
- Department of Pediatrics, University Medical Center Mannheim, 68167 Mannheim, Germany; (U.E.); (J.H.); (S.M.); (H.S.); (R.A.)
| | - Julia Hikel
- Department of Pediatrics, University Medical Center Mannheim, 68167 Mannheim, Germany; (U.E.); (J.H.); (S.M.); (H.S.); (R.A.)
| | - Svenja Meyer
- Department of Pediatrics, University Medical Center Mannheim, 68167 Mannheim, Germany; (U.E.); (J.H.); (S.M.); (H.S.); (R.A.)
| | - Hiroshi Ishikawa
- Laboratory of Clinical Regenerative Medicine, Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1–1–1 Tennodai, Tsukuba, Ibaraki 305–8575, Japan;
| | - Thomas S. Worst
- Department of Urology and Urosurgery, University Medical Center Mannheim, 68167 Mannheim, Germany; (T.S.W.); (K.N.); (P.N.)
| | - Katja Nitschke
- Department of Urology and Urosurgery, University Medical Center Mannheim, 68167 Mannheim, Germany; (T.S.W.); (K.N.); (P.N.)
| | - Philipp Nuhn
- Department of Urology and Urosurgery, University Medical Center Mannheim, 68167 Mannheim, Germany; (T.S.W.); (K.N.); (P.N.)
| | - Stefan Porubsky
- Institute of Pathology, University Medical Center of the Johannes Gutenberg University Mainz, 55101 Mainz, Germany;
| | - Christel Weiss
- Department of Medical Statistics and Biomathematics, University Medical Center Mannheim, 68167 Mannheim, Germany;
| | - Horst Schroten
- Department of Pediatrics, University Medical Center Mannheim, 68167 Mannheim, Germany; (U.E.); (J.H.); (S.M.); (H.S.); (R.A.)
| | - Rüdiger Adam
- Department of Pediatrics, University Medical Center Mannheim, 68167 Mannheim, Germany; (U.E.); (J.H.); (S.M.); (H.S.); (R.A.)
| | - Michael Karremann
- Department of Pediatrics, University Medical Center Mannheim, 68167 Mannheim, Germany; (U.E.); (J.H.); (S.M.); (H.S.); (R.A.)
- Correspondence: ; Tel.: +49-621-383-2393
| |
Collapse
|
23
|
Seemüller F, Riedel M, Obermeier M, Schennach-Wolff R, Spellmann I, Meyer S, Bauer M, Adli M, Kronmüller K, Ising M, Brieger P, Laux G, Bender W, Heuser I, Zeiler J, Gaebel W, Möller HJ. The validity of self-rated psychotic symptoms in depressed inpatients. Eur Psychiatry 2020; 27:547-52. [DOI: 10.1016/j.eurpsy.2011.01.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Revised: 12/23/2010] [Accepted: 01/03/2011] [Indexed: 12/22/2022] Open
Abstract
AbstractBackgroundSelf-ratings of psychotic experiences might be biased by depressive symptoms.MethodData from a large naturalistic multicentre trial on depressed inpatients (n = 488) who were assessed on a biweekly basis until discharge were analyzed. Self-rated psychotic symptoms as assessed with the 90-Item Symptom Checklist (SCL-90) were correlated with the SCL-90 total score, the SCL-90 depression score, the Beck Depression Inventory (BDI), the Hamilton Depression Rating Scale 21 item (HAMD-21) total score, the Montgomery Åsberg Depression Rating Scale (MADRS) total score and the clinician-rated paranoid-hallucinatory score of the Association for Methodology and Documentation in Psychiatry (AMDP) scale.ResultsAt discharge the SCL-90 psychosis score correlated highest with the SCL-90 depression score (0.78, P<0.001) and with the BDI total score (0.64, P<0.001). Moderate correlations were found for the MADRS (0.34, P<0.001), HAMD (0.37, P<0.001) and AMDP depression score (0.33, P<0.001). Only a weak correlation was found between the SCL-90 psychosis score and the AMDP paranoid-hallucinatory syndrome score (0.15, P<0.001). Linear regression showed that change in self-rated psychotic symptoms over the treatment course was best explained by a change in the SCL-90 depression score (P<0.001). The change in clinician-rated AMDP paranoid-hallucinatory score had lesser influence (P = 0.02).ConclusionsIn depressed patients self-rated psychotic symptoms correlate poorly with clinician-rated psychotic symptoms. Caution is warranted when interpreting results from epidemiological surveys using self-rated psychotic symptom questionnaires as indicators of psychotic symptoms. Depressive symptoms which are highly prevalent in the general population might influence such self-ratings.
Collapse
|
24
|
Abstract
Background and aimsValid assessments require sufficient effort from the part of the testee. Motivation may be compromised, particularly in psychiatric conditions. We examined associations between response bias on free recall and self-reported symptoms in depressed and PTSD patients.Participants and methodsThis is a cross-sectional study. Patients had depression (n = 48), or PTSD or other anxiety disorders (n = 37). A control group (n = 47%) had chronic pain disorder, fibromyalgia or chronic fatigue. The Green Word Memory Test (GWMT) was administered to all subjects. The Structured Inventory of Malingered. Symptomatology (SIMS), and the Beck Depression Inventory (BDI-II) were administered in subsamples. Study outcome was self-reported depressive symptoms in Symptom Validity Test (SVT) negative cases.ResultsAverage age of the participants was 45.1 years (SD 9.5), 48.5% were female. GWMT was positive in 52.3% of all cases, GWMT and SIMS were positive in 33.8%, and GWMT and SIMS were negative in 37.7%. No significant group effects on GWMT were found. Average BDI-II scores were 32.8 (SD 13.9) for depressed patients, 28.3 (15.5) for those with anxiety disorders, and 27.6 (14.1) for controls (P = 0.43). Seventy-eight percent of depressed GWMT negative cases reported at least moderate depressive symptoms (BDI-II > 18), and 44.4% severe symptoms (BDI-II > 29). Approximately half of the GWMT negative cases with anxiety disorders and controls scored BDI-II > 18.ConclusionsNon credible test performance is prevalent in disability claimants with affective, mood disorders. However, depressive symptoms per se do not explain poor effort on cognitive tasks.Disclosure of interestThe authors have not supplied their declaration of competing interest.
Collapse
|
25
|
Magallanes L, Meyer S, Gianoli C, Kopp B, Voss B, Jakel O, Brons S, Gordon J, Parodi K. Upgrading an Integrating Carbon-Ion Transmission Imaging System With Active Scanning Beam Delivery Toward Low Dose Ion Imaging. IEEE Trans Radiat Plasma Med Sci 2020. [DOI: 10.1109/trpms.2019.2948584] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
26
|
Hosseinpour Tehrani H, Becker J, Bator I, Saur K, Meyer S, Rodrigues Lóia AC, Blank LM, Wierckx N. Integrated strain- and process design enable production of 220 g L -1 itaconic acid with Ustilago maydis. Biotechnol Biofuels 2019; 12:263. [PMID: 31709012 PMCID: PMC6833137 DOI: 10.1186/s13068-019-1605-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 10/29/2019] [Indexed: 05/28/2023]
Abstract
BACKGROUND Itaconic acid is an unsaturated, dicarboxylic acid which finds a wide range of applications in the polymer industry and as a building block for fuels, solvents and pharmaceuticals. Currently, Aspergillus terreus is used for industrial production, with titers above 100 g L-1 depending on the conditions. Besides A. terreus, Ustilago maydis is also a promising itaconic acid production host due to its yeast-like morphology. Recent strain engineering efforts significantly increased the yield, titer and rate of production. RESULTS In this study, itaconate production by U. maydis was further increased by integrated strain- and process engineering. Next-generation itaconate hyper-producing strains were generated using CRISPR/Cas9 and FLP/FRT genome editing tools for gene deletion, promoter replacement, and overexpression of genes. The handling and morphology of this engineered strain were improved by deletion of fuz7, which is part of a regulatory cascade that governs morphology and pathogenicity. These strain modifications enabled the development of an efficient fermentation process with in situ product crystallization with CaCO3. This integrated approach resulted in a maximum itaconate titer of 220 g L-1, with a total acid titer of 248 g L-1, which is a significant improvement compared to best published itaconate titers reached with U. maydis and with A. terreus. CONCLUSION In this study, itaconic acid production could be enhanced significantly by morphological- and metabolic engineering in combination with process development, yielding the highest titer reported with any microorganism.
Collapse
Affiliation(s)
- Hamed Hosseinpour Tehrani
- iAMB-Institute of Applied Microbiology, ABBt-Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Johanna Becker
- iAMB-Institute of Applied Microbiology, ABBt-Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Isabel Bator
- iAMB-Institute of Applied Microbiology, ABBt-Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Katharina Saur
- iAMB-Institute of Applied Microbiology, ABBt-Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Svenja Meyer
- iAMB-Institute of Applied Microbiology, ABBt-Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Ana Catarina Rodrigues Lóia
- iAMB-Institute of Applied Microbiology, ABBt-Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Lars M. Blank
- iAMB-Institute of Applied Microbiology, ABBt-Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Nick Wierckx
- iAMB-Institute of Applied Microbiology, ABBt-Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
- Institute of Bio- and Geosciences IBG-1: Biotechnology, Forschungszentrum Jülich, Wilhelm-Johnen-Str., 52425 Jülich, Germany
| |
Collapse
|
27
|
Lauer AN, März M, Meyer S, Meurer M, de Buhr N, Borkowski J, Weiß C, Schroten H, Schwerk C. Optimized cultivation of porcine choroid plexus epithelial cells, a blood-cerebrospinal fluid barrier model, for studying granulocyte transmigration. J Transl Med 2019; 99:1245-1255. [PMID: 30996296 DOI: 10.1038/s41374-019-0250-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 02/13/2019] [Accepted: 02/25/2019] [Indexed: 12/16/2022] Open
Abstract
The blood-cerebrospinal fluid barrier (BCSFB) plays important roles during the transport of substances into the brain, the pathogenesis of central nervous system (CNS) diseases, and neuro-immunological processes. Along these lines, transmigration of granulocytes across the blood-cerebrospinal fluid (CSF) barrier (BCSFB) is a hallmark of inflammatory events in the CNS. Choroid plexus (CP) epithelial cells are an important tool to generate in vitro models of the BCSFB. A porcine CP epithelial cell line (PCP-R) has been shown to present properties of the BCSFB, including a strong barrier function, when cultivated on cell culture filter inserts containing a membrane with 0.4 µm pore size. For optimal analysis of pathogen and host immune cell interactions with the basolateral side of the CP epithelium, which presents the physiologically relevant "blood side", the CP epithelial cells need to be grown on the lower face of the filter in an inverted cell culture insert model, with the supporting membrane possessing a pore size of at least 3.0 µm. Here, we demonstrate that PCP-R cells cultivated in the inverted model on filter support membranes with a pore size of 3.0 µm following a "conventional" protocol grow through the pores and cross the membrane, forming a second layer on the upper face. Therefore, we developed a cell cultivation protocol, which strongly reduces crossing of the membrane by the cells. Under these conditions, PCP-R cells retain important properties of a BCSFB model, as was observed by the formation of continuous tight junctions and a strong barrier function demonstrated by a high transepithelial electrical resistance and a low permeability for macromolecules. Importantly, compared with the conventional cultivation conditions, our optimized model allows improved investigations of porcine granulocyte transmigration across the PCP-R cell layer.
Collapse
Affiliation(s)
- Alexa N Lauer
- Department of Pediatrics, Pediatric Infectious Diseases, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Martin März
- Department of Pediatrics, Pediatric Infectious Diseases, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Svenja Meyer
- Department of Pediatrics, Pediatric Infectious Diseases, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Marita Meurer
- Department of Physiological Chemistry, University of Veterinary Medicine Hannover, Hannover, Germany.,Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Hannover, Germany
| | - Nicole de Buhr
- Department of Physiological Chemistry, University of Veterinary Medicine Hannover, Hannover, Germany.,Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Hannover, Germany
| | - Julia Borkowski
- Department of Pediatrics, Pediatric Infectious Diseases, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Christel Weiß
- Institute of Medical Statistics and Biomathematics, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Horst Schroten
- Department of Pediatrics, Pediatric Infectious Diseases, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Christian Schwerk
- Department of Pediatrics, Pediatric Infectious Diseases, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.
| |
Collapse
|
28
|
Weingaertner O, Luetjohann D, Meyer S, Seiler-Mussler S, Fuhrmann A, Schoett HF, Kerksiek A, Friedrichs S, Zawada A, Laufs U, Scheller B, Fliser D, Boehm M, Sijbrands E, Heine GH. P6434Low serum lathosterol levels predict fatal cardiovascular disease and all cause mortality: a prospective cohort study in patients admitted for coronary angiography. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6434] [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)
- O Weingaertner
- Universitätsklinikum Jena, Klinik für Innere Medizin 1, Jena, Germany
| | - D Luetjohann
- Universitätsklinikum Bonn, Institut für Klinische Pharmakologie und Klinische Chemie, Bonn, Germany
| | - S Meyer
- Klinikum Oldenburg, Abteilung für Kardiologie, Oldenburg, Germany
| | - S Seiler-Mussler
- Universitätsklinikum des Saarlandes, Abteilung für Nieren- und Hochdruckkrankheiten, Homburg/Saar, Germany
| | - A Fuhrmann
- Universitätsklinikum Bonn, Institut für Klinische Pharmakologie und Klinische Chemie, Bonn, Germany
| | - H F Schoett
- Universitätsklinikum Bonn, Institut für Klinische Pharmakologie und Klinische Chemie, Bonn, Germany
| | - A Kerksiek
- Universitätsklinikum Bonn, Institut für Klinische Pharmakologie und Klinische Chemie, Bonn, Germany
| | - S Friedrichs
- Universitätsklinikum Bonn, Institut für Klinische Pharmakologie und Klinische Chemie, Bonn, Germany
| | - A Zawada
- Universitätsklinikum des Saarlandes, Abteilung für Nieren- und Hochdruckkrankheiten, Homburg/Saar, Germany
| | - U Laufs
- Universitätsklinikum Leipzig, Klinik und Poliklinik für Kardiologie, Leipzig, Germany
| | - B Scheller
- Universitätsklinikum des Saarlandes, Klinik für Innere Medizin III, Homurg, Germany
| | - D Fliser
- Universitätsklinikum des Saarlandes, Abteilung für Nieren- und Hochdruckkrankheiten, Homburg/Saar, Germany
| | - M Boehm
- Universitätsklinikum des Saarlandes, Klinik für Innere Medizin III, Homurg, Germany
| | - E Sijbrands
- Erasmus University Rotterdam, Department of Internal Medicine, Rotterdam, Netherlands
| | - G H Heine
- Universitätsklinikum des Saarlandes, Abteilung für Nieren- und Hochdruckkrankheiten, Homburg/Saar, Germany
| |
Collapse
|
29
|
Backhaus T, Michel S, Meyer S, Fach A, Schmucker J, Osteresch R, Stehmeier J, Wettwer T, Haase H, Elsaesser A, Hambrecht R, Wienbergen H. P1228Which role plays the school degree in effectiveness of prevention after myocardial infarction? Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 11/14/2022] Open
Affiliation(s)
- T Backhaus
- Hospital Links der Weser, Bremer Institut für Herz- und Kreislaufforschung (BIHKF), Bremen, Germany
| | - S Michel
- Hospital Links der Weser, Bremer Institut für Herz- und Kreislaufforschung (BIHKF), Bremen, Germany
| | - S Meyer
- Oldenburg Hospital, Oldenburg, Germany
| | - A Fach
- Hospital Links der Weser, Bremer Institut für Herz- und Kreislaufforschung (BIHKF), Bremen, Germany
| | - J Schmucker
- Hospital Links der Weser, Bremer Institut für Herz- und Kreislaufforschung (BIHKF), Bremen, Germany
| | - R Osteresch
- Hospital Links der Weser, Bremer Institut für Herz- und Kreislaufforschung (BIHKF), Bremen, Germany
| | - J Stehmeier
- Hospital Links der Weser, Bremer Institut für Herz- und Kreislaufforschung (BIHKF), Bremen, Germany
| | - T Wettwer
- Hospital Links der Weser, Bremer Institut für Herz- und Kreislaufforschung (BIHKF), Bremen, Germany
| | - H Haase
- RehaZentrum, Bremen, Germany
| | | | - R Hambrecht
- Hospital Links der Weser, Bremer Institut für Herz- und Kreislaufforschung (BIHKF), Bremen, Germany
| | - H Wienbergen
- Hospital Links der Weser, Bremer Institut für Herz- und Kreislaufforschung (BIHKF), Bremen, Germany
| |
Collapse
|
30
|
Michel S, Backhaus T, Meyer S, Fach A, Schmucker J, Osteresch R, Stehmeier J, Wettwer T, Haase H, Elsaesser A, Hambrecht R, Wienbergen H. P1229Intensive prevention program after myocardial infarction: how can LDL cholesterol be reduced and how long are intensive prevention efforts needed? Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1229] [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: 11/14/2022] Open
Affiliation(s)
- S Michel
- Bremer Institut für Herz- und Kreislaufforschung (BIHKF) am Klinikum Links der Weser, Bremen, Germany
| | - T Backhaus
- Bremer Institut für Herz- und Kreislaufforschung (BIHKF) am Klinikum Links der Weser, Bremen, Germany
| | - S Meyer
- Klinikum Oldenburg, European Medical School Oldenburg-Groningen, Oldenburg, Germany
| | - A Fach
- Bremer Institut für Herz- und Kreislaufforschung (BIHKF) am Klinikum Links der Weser, Bremen, Germany
| | - J Schmucker
- Bremer Institut für Herz- und Kreislaufforschung (BIHKF) am Klinikum Links der Weser, Bremen, Germany
| | - R Osteresch
- Bremer Institut für Herz- und Kreislaufforschung (BIHKF) am Klinikum Links der Weser, Bremen, Germany
| | - J Stehmeier
- Bremer Institut für Herz- und Kreislaufforschung (BIHKF) am Klinikum Links der Weser, Bremen, Germany
| | - T Wettwer
- Bremer Institut für Herz- und Kreislaufforschung (BIHKF) am Klinikum Links der Weser, Bremen, Germany
| | - H Haase
- RehaZentrum Bremen, Bremen, Germany
| | - A Elsaesser
- Klinikum Oldenburg, European Medical School Oldenburg-Groningen, Oldenburg, Germany
| | - R Hambrecht
- Bremer Institut für Herz- und Kreislaufforschung (BIHKF) am Klinikum Links der Weser, Bremen, Germany
| | - H Wienbergen
- Bremer Institut für Herz- und Kreislaufforschung (BIHKF) am Klinikum Links der Weser, Bremen, Germany
| |
Collapse
|
31
|
Fuhrmann A, Weingaertner O, Meyer S, Cremers B, Seiler-Mussler S, Schoett HF, Kerksiek A, Ulbricht U, Zawada A, Laufs U, Scheller B, Fliser D, Boehm M, Heine GH, Luetjohann D. P1544No associations of plasma oxyphytosterol levels and cardiovascular events in patients admitted for coronary angiography. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1544] [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)
- A Fuhrmann
- Universitätsklinikum Bonn, Institut für Klinische Pharmakologie und Klinische Chemie, Bonn, Germany
| | - O Weingaertner
- Universitätsklinikum Jena, Klinik für Innere Medizin 1, Jena, Germany
| | - S Meyer
- Klinikum Oldenburg, Abteilung für Kardiologie, Oldenburg, Germany
| | - B Cremers
- Universitätsklinikum des Saarlandes, Klinik für Innere Medizin III, Homurg, Germany
| | - S Seiler-Mussler
- Universitätsklinikum des Saarlandes, Abteilung für Nieren- und Hochdruckkrankheiten, Homburg/Saar, Germany
| | - H F Schoett
- Universitätsklinikum Bonn, Institut für Klinische Pharmakologie und Klinische Chemie, Bonn, Germany
| | - A Kerksiek
- Universitätsklinikum Bonn, Institut für Klinische Pharmakologie und Klinische Chemie, Bonn, Germany
| | - U Ulbricht
- Universitätsklinikum des Saarlandes, Abteilung für Nieren- und Hochdruckkrankheiten, Homburg/Saar, Germany
| | - A Zawada
- Universitätsklinikum des Saarlandes, Abteilung für Nieren- und Hochdruckkrankheiten, Homburg/Saar, Germany
| | - U Laufs
- Universitätsklinikum Leipzig, Klinik und Poliklinik für Kardiologie, Leipzig, Germany
| | - B Scheller
- Universitätsklinikum des Saarlandes, Klinik für Innere Medizin III, Homurg, Germany
| | - D Fliser
- Universitätsklinikum des Saarlandes, Abteilung für Nieren- und Hochdruckkrankheiten, Homburg/Saar, Germany
| | - M Boehm
- Universitätsklinikum des Saarlandes, Klinik für Innere Medizin III, Homurg, Germany
| | - G H Heine
- Universitätsklinikum des Saarlandes, Abteilung für Nieren- und Hochdruckkrankheiten, Homburg/Saar, Germany
| | - D Luetjohann
- Universitätsklinikum Bonn, Institut für Klinische Pharmakologie und Klinische Chemie, Bonn, Germany
| |
Collapse
|
32
|
Geiser E, Hosseinpour Tehrani H, Meyer S, Blank LM, Wierckx N. Evolutionary freedom in the regulation of the conserved itaconate cluster by Ria1 in related Ustilaginaceae. Fungal Biol Biotechnol 2018; 5:14. [PMID: 30065845 PMCID: PMC6064134 DOI: 10.1186/s40694-018-0058-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 07/16/2018] [Indexed: 12/31/2022] Open
Abstract
Background Itaconate is getting growing biotechnological significance, due to its use as a platform compound for the production of bio-based polymers, chemicals, and novel fuels. Currently, Aspergillus terreus is used for its industrial production. The Ustilaginaceae family of smut fungi, especially Ustilago maydis, has gained biotechnological interest, due to its ability to naturally produce this dicarboxylic acid. The unicellular, non-filamentous growth form makes these fungi promising alternative candidates for itaconate production. Itaconate production was also observed in other Ustilaginaceae species such as U. cynodontis, U. xerochloae, and U. vetiveriae. The investigated species and strains varied in a range of 0-8 g L-1 itaconate. The genes responsible for itaconate biosynthesis are not known for these strains and therefore not characterized to explain this variability. Results Itaconate production of 13 strains from 7 species known as itaconate producers among the family Ustilaginaceae were further characterized. The sequences of the gene cluster for itaconate synthesis were analyzed by a complete genome sequencing and comparison to the annotated itaconate cluster of U. maydis. Additionally, the phylogenetic relationship and inter-species transferability of the itaconate cluster transcription factor Ria1 was investigated in detail. Doing so, itaconate production could be activated or enhanced by overexpression of Ria1 originating from a related species, showing their narrow phylogenetic relatedness. Conclusion Itaconate production by Ustilaginaceae species can be considerably increased by changing gene cluster regulation by overexpression of the Ria1 protein, thus contributing to the industrial application of these fungi for the biotechnological production of this valuable biomass derived chemical.
Collapse
Affiliation(s)
- Elena Geiser
- 1iAMB - Institute of Applied Microbiology, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany.,BioSC, c/o Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Hamed Hosseinpour Tehrani
- 1iAMB - Institute of Applied Microbiology, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Svenja Meyer
- 1iAMB - Institute of Applied Microbiology, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Lars M Blank
- 1iAMB - Institute of Applied Microbiology, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Nick Wierckx
- 1iAMB - Institute of Applied Microbiology, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| |
Collapse
|
33
|
März M, Meyer S, Erb U, Georgikou C, Horstmann MA, Hetjens S, Weiß C, Fallier-Becker P, Vandenhaute E, Ishikawa H, Schroten H, Dürken M, Karremann M. Pediatric acute lymphoblastic leukemia-Conquering the CNS across the choroid plexus. Leuk Res 2018; 71:47-54. [PMID: 30005184 DOI: 10.1016/j.leukres.2018.07.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 06/16/2018] [Accepted: 07/02/2018] [Indexed: 12/20/2022]
Abstract
Despite the high prevalence of central nervous system (CNS) involvement in relapsing pediatric acute lymphoblastic leukemia (ALL), our understanding of CNS invasion is still vague. As lymphoblasts have to overcome the physiological blood-CNS barriers to enter the CNS, we investigated the cellular interactions of lymphoblasts with the choroid plexus (CP) epithelium of the blood-cerebrospinal fluid barrier (BCSFB). Both a precurser B cell ALL (pB-ALL) cell line (SD-1) and a T cell ALL (T-ALL) cell line (P12-Ishikawa) were able to actively cross the CP epithelium in a human in vitro model. We could illustrate a transcellular and (supposedly) paracellular transmigration by 3-dimensional immunofluorescence microscopy as well as electron microscopy. Chemotactic stimulation with CXCL12 during this process led to a significantly increased transmigration and blocking CXCL12/CXCR4-signaling by the CXCR4-inhibitor AMD3100 inhibited this effect. However, CXCR4 expression in primary ALL samples did not correlate to CNS disease, indicating that CXCR4-driven CNS invasion across the BCSFB might be a general property of pediatric ALL. Notably, we present a unique in vitro BCSFB model suitable to study CNS invasion of lymphoblasts in a human setting, providing the opportunity to investigate experimental variables, which may determine CNS disease childhood ALL.
Collapse
Affiliation(s)
- Martin März
- Department of Pediatrics, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Svenja Meyer
- Department of Pediatrics, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Ulrike Erb
- Department of Pediatrics, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Christina Georgikou
- Department of Pediatrics, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Martin A Horstmann
- Research Institute Children's Cancer Center and Clinic of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Svetlana Hetjens
- Institute of Medical Statistics and Biomathematics, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Christel Weiß
- Institute of Medical Statistics and Biomathematics, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Petra Fallier-Becker
- Institute of Pathology and Neuropathology, University Hospital of Tuebingen, Tuebingen, Germany
| | - Elodie Vandenhaute
- Laboratoire de la Barrière Hémato-Encéphalique (LBHE, EA 2465), Faculté des Sciences Jean Perrin, Université d'Artois, Lens, France
| | - Hiroshi Ishikawa
- Department of NDU Life Sciences, Nippon Dental University, School of Life Dentistry, Chyoda-ku, Tokyo, Japan
| | - Horst Schroten
- Department of Pediatrics, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Matthias Dürken
- Department of Pediatrics, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Michael Karremann
- Department of Pediatrics, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.
| |
Collapse
|
34
|
Solaro C, Meyer S, Fisher K, DePalatis MV, Drewsen M. Direct Frequency-Comb-Driven Raman Transitions in the Terahertz Range. Phys Rev Lett 2018; 120:253601. [PMID: 29979052 DOI: 10.1103/physrevlett.120.253601] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Indexed: 06/08/2023]
Abstract
We demonstrate the use of a femtosecond frequency comb to coherently drive stimulated Raman transitions between terahertz-spaced atomic energy levels. More specifically, we address the 3d ^{2}D_{3/2} and 3d ^{2}D_{5/2} fine structure levels of a single trapped ^{40}Ca^{+} ion and spectroscopically resolve the transition frequency to be ν_{D}=1,819,599,021,534±8 Hz. The achieved accuracy is nearly a factor of five better than the previous best Raman spectroscopy, and is currently limited by the stability of our atomic clock reference. Furthermore, the population dynamics of frequency-comb-driven Raman transitions can be fully predicted from the spectral properties of the frequency comb, and Rabi oscillations with a contrast of 99.3(6)% and millisecond coherence time have been achieved. Importantly, the technique can be easily generalized to transitions in the sub-kHz to tens of THz range and should be applicable for driving, e.g., spin-resolved rovibrational transitions in molecules and hyperfine transitions in highly charged ions.
Collapse
Affiliation(s)
- C Solaro
- Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
| | - S Meyer
- Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
| | - K Fisher
- Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
| | - M V DePalatis
- Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
| | - M Drewsen
- Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
| |
Collapse
|
35
|
Hogan C, Speiser E, Chandola S, Suchkova S, Aulbach J, Schäfer J, Meyer S, Claessen R, Esser N. Controlling the Local Electronic Properties of Si(553)-Au through Hydrogen Doping. Phys Rev Lett 2018; 120:166801. [PMID: 29756924 DOI: 10.1103/physrevlett.120.166801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 11/12/2017] [Indexed: 06/08/2023]
Abstract
We propose a quantitative and reversible method for tuning the charge localization of Au-stabilized stepped Si surfaces by site-specific hydrogenation. This is demonstrated for Si(553)-Au as a model system by combining density functional theory simulations and reflectance anisotropy spectroscopy experiments. We find that controlled H passivation is a two-step process: step-edge adsorption drives excess charge into the conducting metal chain "reservoir" and renders it insulating, while surplus H recovers metallic behavior. Our approach illustrates a route towards microscopic manipulation of the local surface charge distribution and establishes a reversible switch of site-specific chemical reactivity and magnetic properties on vicinal surfaces.
Collapse
Affiliation(s)
- C Hogan
- Istituto di Struttura della Materia-CNR (ISM-CNR), via Fosso del Cavaliere 100, 00133 Rome, Italy
- Dipartimento di Fisica, Università di Roma "Tor Vergata", Via della Ricerca Scientifica 1, 00133 Roma, Italy
| | - E Speiser
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Schwarzschildstraße 8, 12489 Berlin, Germany
| | - S Chandola
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Schwarzschildstraße 8, 12489 Berlin, Germany
| | - S Suchkova
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Schwarzschildstraße 8, 12489 Berlin, Germany
| | - J Aulbach
- Physikalisches Institut and Röntgen Center for Complex Material Systems (RCCM), Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - J Schäfer
- Physikalisches Institut and Röntgen Center for Complex Material Systems (RCCM), Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - S Meyer
- Physikalisches Institut and Röntgen Center for Complex Material Systems (RCCM), Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - R Claessen
- Physikalisches Institut and Röntgen Center for Complex Material Systems (RCCM), Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - N Esser
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Schwarzschildstraße 8, 12489 Berlin, Germany
| |
Collapse
|
36
|
Bernabé KJ, Nokoff NJ, Galan D, Felsen D, Aston CE, Austin P, Baskin L, Chan YM, Cheng EY, Diamond DA, Ellens R, Fried A, Greenfield S, Kolon T, Kropp B, Lakshmanan Y, Meyer S, Meyer T, Delozier AM, Mullins LL, Palmer B, Paradis A, Reddy P, Reyes KJS, Schulte M, Swartz JM, Yerkes E, Wolfe-Christensen C, Wisniewski AB, Poppas DP. Preliminary report: Surgical outcomes following genitoplasty in children with moderate to severe genital atypia. J Pediatr Urol 2018; 14:157.e1-157.e8. [PMID: 29398588 PMCID: PMC5970022 DOI: 10.1016/j.jpurol.2017.11.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 05/15/2017] [Accepted: 11/23/2017] [Indexed: 11/20/2022]
Abstract
INTRODUCTION Prior studies of outcomes following genitoplasty have reported high rates of surgical complications among children with atypical genitalia. Few studies have prospectively assessed outcomes after contemporary surgical approaches. OBJECTIVE The current study reported the occurrence of early postoperative complications and of cosmetic outcomes (as rated by surgeons and parents) at 12 months following contemporary genitoplasty procedures in children born with atypical genitalia. STUDY DESIGN This 11-site, prospective study included children aged ≤2 years, with Prader 3-5 or Quigley 3-6 external genitalia, with no prior genitoplasty and non-urogenital malformations at the time of enrollment. Genital appearance was rated on a 4-point Likert scale. Paired t-tests evaluated differences in cosmesis ratings. RESULTS Out of 27 children, 10 were 46,XY patients with the following diagnoses: gonadal dysgenesis, PAIS or testosterone biosynthetic defect, severe hypospadias and microphallus, who were reared male. Sixteen 46,XX congenital adrenal hyperplasia patients were reared female and one child with sex chromosome mosaicism was reared male. Eleven children had masculinizing genitoplasty for penoscrotal or perineal hypospadias (one-stage, three; two-stage, eight). Among one-stage surgeries, one child had meatal stenosis (minor) and one developed both urinary retention (minor) and urethrocutaneous fistula (major) (Summary Figure). Among two-stage surgeries, three children developed a major complication: penoscrotal fistula, glans dehiscence or urethral dehiscence. Among 16 children who had feminizing genitoplasty, vaginoplasty was performed in all, clitoroplasty in nine, external genitoplasty in 13, urethroplasty in four, perineoplasty in five, and total urogenital sinus mobilization in two. Two children had minor complications: one had a UTI, and one had both a mucosal skin tag and vaginal mucosal polyp. Two additional children developed a major complication: vaginal stenosis. Cosmesis scores revealed sustained improvements from 6 months post-genitoplasty, as previously reported, with all scores reported as good or satisfied. DISCUSSION In these preliminary data from a multi-site, observational study, parents and surgeons were equally satisfied with the cosmetic outcomes 12 months after genitoplasty. A small number of patients had major complications in both feminizing and masculinizing surgeries; two-stage hypospadias repair had the most major complications. Long-term follow-up of patients at post-puberty will provide a better assessment of outcomes in this population. CONCLUSION In this cohort of children with moderate to severe atypical genitalia, preliminary data on both surgical and cosmetic outcomes were presented. Findings from this study, and from following these children in long-term studies, will help guide practitioners in their discussions with families about surgical management.
Collapse
Affiliation(s)
- K J Bernabé
- The Comprehensive Center for Congenital Adrenal Hyperplasia, New York-Presbyterian Hospital/Weill Cornell Medicine, New York, NY, USA
| | - N J Nokoff
- Children's Hospital Colorado, Aurora, CO, USA
| | - D Galan
- The Comprehensive Center for Congenital Adrenal Hyperplasia, New York-Presbyterian Hospital/Weill Cornell Medicine, New York, NY, USA
| | - D Felsen
- The Comprehensive Center for Congenital Adrenal Hyperplasia, New York-Presbyterian Hospital/Weill Cornell Medicine, New York, NY, USA
| | - C E Aston
- University of Oklahoma Health Sciences Center, Department of Pediatrics, Oklahoma City, OK, USA
| | - P Austin
- St. Louis Children's Hospital, St. Louis, Missouri, USA
| | - L Baskin
- University of California San Francisco, San Francisco, CA, USA
| | - Y-M Chan
- Children's Hospital Boston, Department of Urology, Boston, MA, USA
| | - E Y Cheng
- Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA
| | - D A Diamond
- Children's Hospital Boston, Department of Urology, Boston, MA, USA
| | - R Ellens
- Children's Hospital of Michigan, Detroit, MI, USA
| | - A Fried
- Women and Children's Hospital of Buffalo, Buffalo, NY, USA
| | - S Greenfield
- Women and Children's Hospital of Buffalo, Buffalo, NY, USA
| | - T Kolon
- Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - B Kropp
- Genitourinary Institute, Cook Children's Hospital, Fort Worth, TX, USA
| | - Y Lakshmanan
- Children's Hospital of Michigan, Detroit, MI, USA
| | - S Meyer
- Women and Children's Hospital of Buffalo, Buffalo, NY, USA
| | - T Meyer
- Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA
| | - A M Delozier
- Oklahoma State University, College of Arts and Sciences, Stillwater, OK, USA
| | - L L Mullins
- Oklahoma State University, College of Arts and Sciences, Stillwater, OK, USA
| | - B Palmer
- Genitourinary Institute, Cook Children's Hospital, Fort Worth, TX, USA
| | - A Paradis
- St. Louis Children's Hospital, St. Louis, Missouri, USA
| | - P Reddy
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - K J Scott Reyes
- Genitourinary Institute, Cook Children's Hospital, Fort Worth, TX, USA
| | - M Schulte
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - J M Swartz
- Children's Hospital Boston, Department of Urology, Boston, MA, USA
| | - E Yerkes
- Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA
| | - C Wolfe-Christensen
- Genitourinary Institute, Cook Children's Hospital, Fort Worth, TX, USA; Children's Hospital of Michigan, Detroit, MI, USA
| | - A B Wisniewski
- Genitourinary Institute, Cook Children's Hospital, Fort Worth, TX, USA
| | - D P Poppas
- The Comprehensive Center for Congenital Adrenal Hyperplasia, New York-Presbyterian Hospital/Weill Cornell Medicine, New York, NY, USA.
| |
Collapse
|
37
|
Schell M, Meyer S, Rath M, Schwerdtle T, Kleinridders A. Extracellular citrate impacts hypothalamic mitochondrial function and activates AMPK. DIABETOL STOFFWECHS 2018. [DOI: 10.1055/s-0038-1641800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- M Schell
- German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), Central Regulation of Metabolism, Nuthetal, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - S Meyer
- University of Potsdam, Institute of Nutritional Science, Nuthetal, Germany
| | - M Rath
- German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), Central Regulation of Metabolism, Nuthetal, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - T Schwerdtle
- University of Potsdam, Institute of Nutritional Science, Nuthetal, Germany
| | - A Kleinridders
- German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), Central Regulation of Metabolism, Nuthetal, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| |
Collapse
|
38
|
Donath E, Vardanyan I, Meyer S, Murray RA, Moya SE, Navoyan Z, Arakelyan V. A typical diffusion monitored by flow cytometry: slow diffusion of small molecules in polyelectrolyte multilayers. Nanoscale 2018; 10:765-772. [PMID: 29256567 DOI: 10.1039/c7nr08405f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
An innovative approach has been developed to measure small molecule diffusion in polyelectrolyte multilayers (PEMs) assembled on colloidal particles by means of flow cytometry (FACS). FACS allows changes in fluorescence emission as a function of time to be recorded per particle in a colloidal dispersion. Dithionite, S2O42-, diffusion in PEMs composed of polyallylamine hydrochloride (PAH) and poly styrene sulfonate (PSS) assembled on silica particles has been studied by recording the quenching of (7-nitrobenz-2-oxa-1,3-diazol-4yl)amino (NBD) labelled PAH layers by FACS. NBD is reduced when it encounters dithionite, and is therefore no longer fluorescent. The decay in fluorescence will be used to follow the kinetics of dithionite diffusion. The fluorescence decay curves show slow diffusion that does not follow classical Fickean law. However, by assuming that the diffusion coefficient is time dependent and follows an inverse power law in an atypical diffusion case, it was possible to obtain an excellent fit for the decay curves.
Collapse
Affiliation(s)
- E Donath
- Institute of Medical and Biophysics, University of Leipzig, Haertelstrasse 16-18, Leipzig, Germany
| | | | | | | | | | | | | |
Collapse
|
39
|
Meyer S, López-Serrano A, Mitze H, Jakubowski N, Schwerdtle T. Single-cell analysis by ICP-MS/MS as a fast tool for cellular bioavailability studies of arsenite. Metallomics 2018; 10:73-76. [DOI: 10.1039/c7mt00285h] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A fast and reliable single-cell ICP-MS/MS method is presented to determine the bioavailability of metal species as well as sulfur and phosphorus as internal control after re-suspension of cells in water.
Collapse
Affiliation(s)
- S. Meyer
- Institute of Nutritional Science
- University of Potsdam
- 14558 Nuthetal
- Germany
- NutriAct – Competence Cluster Nutrition Research Berlin-Potsdam
| | - A. López-Serrano
- Bundesanstalt für Materialforschung und – prüfung (BAM)
- 12489 Berlin
- Germany
| | - H. Mitze
- Institute of Nutritional Science
- University of Potsdam
- 14558 Nuthetal
- Germany
| | - N. Jakubowski
- Bundesanstalt für Materialforschung und – prüfung (BAM)
- 12489 Berlin
- Germany
| | - T. Schwerdtle
- Institute of Nutritional Science
- University of Potsdam
- 14558 Nuthetal
- Germany
- NutriAct – Competence Cluster Nutrition Research Berlin-Potsdam
| |
Collapse
|
40
|
Poryo M, Shatat M, Gortner L, Abdul-Khaliq H, Meyer S. The Role of EEG Recordings in Children undergoing Cardiac Surgery for Congenital Heart Disease. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1628319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- M. Poryo
- Clinic for Pediatric Cardiology, Saarland University Hospital, Homburg, Germany
| | - M. Shatat
- Clinic for Pediatric Cardiology, Saarland University Hospital, Homburg, Germany
| | - L. Gortner
- Clinic für Pediatrics and Neurology, Saarland University Hospital, Homburg, Germany
| | - H. Abdul-Khaliq
- Clinic for Pediatric Cardiology, Saarland University Hospital, Homburg, Germany
| | - S. Meyer
- Clinic für Pediatrics and Neurology, Saarland University Hospital, Homburg, Germany
| |
Collapse
|
41
|
Lüker J, Sultan A, Plenge T, van den Bruck J, Heeger CH, Meyer S, Mischke K, Tilz RR, Vollmann D, Nölker G, Schäffer B, Willems S, Steven D. Electrical cardioversion of patients with implanted pacemaker or cardioverter-defibrillator: results of a survey of german centers and systematic review of the literature. Clin Res Cardiol 2017; 107:249-258. [PMID: 29151182 DOI: 10.1007/s00392-017-1178-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 11/06/2017] [Indexed: 01/08/2023]
Abstract
AIMS A relevant number of patients presenting for electrical cardioversion carry a pacemaker (PM) or ICD. Case reports suggest a potential hazard of external cardioversion/defibrillation. The incidence of shock related device complications is unknown. No guidelines or recommendations by international medical societies for a cardioversion protocol of cardiovascular implantable electronic device (CIED) patients exist. We conducted a nationwide survey to gather real-world clinical data on the current clinical approach towards these patients during electrical cardioversion and to estimate the incidence of shock-related complications. METHODS AND RESULTS Ninety hospitals with > 380 ECV in 2014 were identified from mandatory hospital quality reports and 60 were randomly selected. All centers were provided with a standardized questionnaire on the general proceedings and complications during electrical cardioversion of pacemaker, ICD and CRT patients (CIED patients). Thirty-two centers (53%) participated in the survey. In total, 16,554 ECV were reported (534 ± 314 per center). Biphasic cardioversion with a first shock energy of ≥ 150 J via adhesive patches in antero-posterior orientation was preferred by most centers (78%). Eleven percent (n = 1809) of pts were reported to carry a PM/ICD. The ECV protocol was heterogeneous among centers. Complications associated with electrical cardioversion were reported in 11/1809 patients (0.6%), all were transitory elevations of pacing thresholds. CONCLUSIONS In this nationwide snapshot survey of cardioversion procedures in Germany, approximately 11% of patients presenting for elective electrical cardioversion were pacemaker or ICD carriers. Cardioversion protocols in these patients are heterogeneous throughout centers and mostly not in accordance with recommendation of the German Cardiac Society. Complications associated with external electrical cardioversion are rare. Controlled trials and large registries are necessary to provide evidence for future recommendations.
Collapse
Affiliation(s)
- J Lüker
- Department of Electrophysiology, University Hospital Cologne, Cologne, Germany.
| | - A Sultan
- Department of Electrophysiology, University Hospital Cologne, Cologne, Germany
| | - T Plenge
- Department of Electrophysiology, University Hospital Cologne, Cologne, Germany
| | - J van den Bruck
- Department of Electrophysiology, University Hospital Cologne, Cologne, Germany
| | - C-H Heeger
- Department of Cardiology, Asklepios Klinik St.Georg, Hamburg, Germany
| | - S Meyer
- Department of Cardiology, Hospital Oldenburg, Oldenburg, Germany
| | - K Mischke
- Department of Cardiology, University Hospital Aachen, Aachen, Germany
| | - R R Tilz
- Department of Cardiology, University Hospital Lübeck, Lübeck, Germany
| | - D Vollmann
- Herz- & Gefäßzentrum Göttingen, Göttingen, Germany
| | - G Nölker
- Clinic for Cardiology, Heart and Diabetes Center North-Rhine Westphalia, Bad Oeynhausen, Germany
| | - B Schäffer
- Department of Electrophysiology, University Heart Center, Hamburg, Germany
| | - S Willems
- Department of Electrophysiology, University Heart Center, Hamburg, Germany
| | - D Steven
- Department of Electrophysiology, University Hospital Cologne, Cologne, Germany
| |
Collapse
|
42
|
Müller SM, Ebert F, Raber G, Meyer S, Bornhorst J, Hüwel S, Galla HJ, Francesconi KA, Schwerdtle T. Effects of arsenolipids on in vitro blood-brain barrier model. Arch Toxicol 2017; 92:823-832. [PMID: 29058019 DOI: 10.1007/s00204-017-2085-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [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: 07/17/2017] [Accepted: 09/26/2017] [Indexed: 02/04/2023]
Abstract
Arsenic-containing hydrocarbons (AsHCs), a subgroup of arsenolipids (AsLs) occurring in fish and edible algae, possess a substantial neurotoxic potential in fully differentiated human brain cells. Previous in vivo studies indicating that AsHCs cross the blood-brain barrier of the fruit fly Drosophila melanogaster raised the question whether AsLs could also cross the vertebrate blood-brain barrier (BBB). In the present study, we investigated the impact of several representatives of AsLs (AsHC 332, AsHC 360, AsHC 444, and two arsenic-containing fatty acids, AsFA 362 and AsFA 388) as well as of their metabolites (thio/oxo-dimethylpropionic acid, dimethylarsinic acid) on porcine brain capillary endothelial cells (PBCECs, in vitro model for the blood-brain barrier). AsHCs exerted the strongest cytotoxic effects of all investigated arsenicals as they were up to fivefold more potent than the toxic reference species arsenite (iAsIII). In our in vitro BBB-model, we observed a slight transfer of AsHC 332 across the BBB after 6 h at concentrations that do not affect the barrier integrity. Furthermore, incubation with AsHCs for 72 h led to a disruption of the barrier at sub-cytotoxic concentrations. The subsequent immunocytochemical staining of three tight junction proteins revealed a significant impact on the cell membrane. Because AsHCs enhance the permeability of the in vitro blood-brain barrier, a similar behavior in an in vivo system cannot be excluded. Consequently, AsHCs might facilitate the transfer of accompanying foodborne toxicants into the brain.
Collapse
Affiliation(s)
- S M Müller
- Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, 14558, Nuthetal, Germany.,Heinrich-Stockmeyer Foundation, Parkstraße 44-46, 49214, Bad Rothenfelde, Germany
| | - F Ebert
- Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, 14558, Nuthetal, Germany
| | - G Raber
- Institute of Chemistry, NAWI Graz, University of Graz, Universitaetsplatz 1, 8010, Graz, Austria
| | - S Meyer
- Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, 14558, Nuthetal, Germany
| | - J Bornhorst
- Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, 14558, Nuthetal, Germany
| | - S Hüwel
- Institute of Biochemistry, University of Münster, Wilhelm-Klemm-Str. 2, 48149, Münster, Germany
| | - H-J Galla
- Institute of Biochemistry, University of Münster, Wilhelm-Klemm-Str. 2, 48149, Münster, Germany
| | - K A Francesconi
- Institute of Chemistry, NAWI Graz, University of Graz, Universitaetsplatz 1, 8010, Graz, Austria
| | - T Schwerdtle
- Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, 14558, Nuthetal, Germany.
| |
Collapse
|
43
|
Caesar A, Meyer S, Trost N, Neuenschwander K, Geisen C, Frey BM, Gassner C, Schwind P. A uniform method for the simultaneous blood group phenotyping of Fya
, Fyb
, Jka
, Jkb
, S, s̅, P1, k applying lateral-flow technique. Vox Sang 2017; 113:177-184. [DOI: 10.1111/vox.12603] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 09/14/2017] [Accepted: 09/14/2017] [Indexed: 11/29/2022]
Affiliation(s)
- A. Caesar
- Medion Grifols Diagnostics AG; Duedingen Switzerland
| | - S. Meyer
- Blood Transfusion Service Zurich; Swiss Red Cross; Schlieren Switzerland
| | - N. Trost
- Blood Transfusion Service Zurich; Swiss Red Cross; Schlieren Switzerland
| | - K. Neuenschwander
- Blood Transfusion Service Zurich; Swiss Red Cross; Schlieren Switzerland
| | - C. Geisen
- Institute for Transfusion Medicine and Immunohaematology; German Red Cross Blood Donor Service Baden-Württemberg-Hessen gGmbH; Goethe University Hospital; Frankfurt am Main Germany
| | - B. M. Frey
- Blood Transfusion Service Zurich; Swiss Red Cross; Schlieren Switzerland
| | - C. Gassner
- Blood Transfusion Service Zurich; Swiss Red Cross; Schlieren Switzerland
| | - P. Schwind
- Medion Grifols Diagnostics AG; Duedingen Switzerland
| |
Collapse
|
44
|
Meyer S, Chen YT, Wimmer S, Althammer M, Wimmer T, Schlitz R, Geprägs S, Huebl H, Ködderitzsch D, Ebert H, Bauer GEW, Gross R, Goennenwein STB. Observation of the spin Nernst effect. Nat Mater 2017; 16:977-981. [PMID: 28892056 DOI: 10.1038/nmat4964] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 07/11/2017] [Indexed: 06/07/2023]
Abstract
The observation of the spin Hall effect triggered intense research on pure spin current transport. With the spin Hall effect, the spin Seebeck effect and the spin Peltier effect already observed, our picture of pure spin current transport is almost complete. The only missing piece is the spin Nernst (-Ettingshausen) effect, which so far has been discussed only on theoretical grounds. Here, we report the observation of the spin Nernst effect. By applying a longitudinal temperature gradient, we generate a pure transverse spin current in a Pt thin film. For readout, we exploit the magnetization-orientation-dependent spin transfer to an adjacent yttrium iron garnet layer, converting the spin Nernst current in Pt into a controlled change of the longitudinal and transverse thermopower voltage. Our experiments show that the spin Nernst and the spin Hall effect in Pt are of comparable magnitude, but differ in sign, as corroborated by first-principles calculations.
Collapse
Affiliation(s)
- S Meyer
- Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meißner-Straße 8, 85748 Garching, Germany
- Physik-Department, Technische Universität München, 85748 Garching, Germany
| | - Y-T Chen
- Kavli Institute of NanoScience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, the Netherlands
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - S Wimmer
- Department Chemie, Physikalische Chemie, Universität München, Butenandtstraße 5-13, 81377 München, Germany
| | - M Althammer
- Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meißner-Straße 8, 85748 Garching, Germany
| | - T Wimmer
- Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meißner-Straße 8, 85748 Garching, Germany
- Physik-Department, Technische Universität München, 85748 Garching, Germany
| | - R Schlitz
- Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meißner-Straße 8, 85748 Garching, Germany
| | - S Geprägs
- Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meißner-Straße 8, 85748 Garching, Germany
| | - H Huebl
- Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meißner-Straße 8, 85748 Garching, Germany
- Physik-Department, Technische Universität München, 85748 Garching, Germany
- Nanosystems Initiative Munich (NIM), Schellingstraße 4, 80799 München, Germany
| | - D Ködderitzsch
- Department Chemie, Physikalische Chemie, Universität München, Butenandtstraße 5-13, 81377 München, Germany
| | - H Ebert
- Department Chemie, Physikalische Chemie, Universität München, Butenandtstraße 5-13, 81377 München, Germany
| | - G E W Bauer
- Kavli Institute of NanoScience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, the Netherlands
- Institute for Materials Research, Tohoku University, Sendai, Miyagi 980-8577, Japan
- WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - R Gross
- Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meißner-Straße 8, 85748 Garching, Germany
- Physik-Department, Technische Universität München, 85748 Garching, Germany
- Nanosystems Initiative Munich (NIM), Schellingstraße 4, 80799 München, Germany
| | - S T B Goennenwein
- Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meißner-Straße 8, 85748 Garching, Germany
- Physik-Department, Technische Universität München, 85748 Garching, Germany
- Nanosystems Initiative Munich (NIM), Schellingstraße 4, 80799 München, Germany
| |
Collapse
|
45
|
Meyer S, Schröter MA, Hahn MB, Solomun T, Sturm H, Kunte HJ. Ectoine can enhance structural changes in DNA in vitro. Sci Rep 2017; 7:7170. [PMID: 28775267 PMCID: PMC5543045 DOI: 10.1038/s41598-017-07441-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 06/26/2017] [Indexed: 11/20/2022] Open
Abstract
Strand breaks and conformational changes of DNA have consequences for the physiological role of DNA. The natural protecting molecule ectoine is beneficial to entire bacterial cells and biomolecules such as proteins by mitigating detrimental effects of environmental stresses. It was postulated that ectoine-like molecules bind to negatively charged spheres that mimic DNA surfaces. We investigated the effect of ectoine on DNA and whether ectoine is able to protect DNA from damages caused by ultraviolet radiation (UV-A). In order to determine different isoforms of DNA, agarose gel electrophoresis and atomic force microscopy experiments were carried out with plasmid pUC19 DNA. Our quantitative results revealed that a prolonged incubation of DNA with ectoine leads to an increase in transitions from supercoiled (undamaged) to open circular (single-strand break) conformation at pH 6.6. The effect is pH dependent and no significant changes were observed at physiological pH of 7.5. After UV-A irradiation in ectoine solution, changes in DNA conformation were even more pronounced and this effect was pH dependent. We hypothesize that ectoine is attracted to the negatively charge surface of DNA at lower pH and therefore fails to act as a stabilizing agent for DNA in our in vitro experiments.
Collapse
Affiliation(s)
- S Meyer
- Federal Institute for Materials Research and Testing, D-12205, Berlin, Germany. .,Institute of Biochemistry and Biology, University of Potsdam, D-14476, Potsdam, Germany.
| | - M-A Schröter
- Federal Institute for Materials Research and Testing, D-12205, Berlin, Germany
| | - M B Hahn
- Federal Institute for Materials Research and Testing, D-12205, Berlin, Germany.,Institute of Experimental Physics, Free University Berlin, Department of Physics, D-14195, Berlin, Germany
| | - T Solomun
- Federal Institute for Materials Research and Testing, D-12205, Berlin, Germany
| | - H Sturm
- Federal Institute for Materials Research and Testing, D-12205, Berlin, Germany.,Technical University Berlin, D-10587, Berlin, Germany
| | - H J Kunte
- Federal Institute for Materials Research and Testing, D-12205, Berlin, Germany
| |
Collapse
|
46
|
Wienbergen H, Backhaus T, Michel S, Stehmeier J, Kraemer K, Schmucker J, Meyer S, Meyer J, Haase H, Elsaesser A, Hambrecht R. P2476Assessment and control of physical activity by step counters and online documentation in secondary prevention after myocardial infarction. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2476] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
47
|
Senaratne J, Norris C, McClure R, Nagendran J, Butler C, Meyer S, Anderson T, Van Diepen S. 2200Adherence to cardiac surgical waitlist guidelines is a poor predictor of cardiac surgery waitlist mortality. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.2200] [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
|
48
|
Affiliation(s)
- S. Meyer
- SIBIS Institute for Social Research and Technology Consulting in Berlin, Berlin, Germany
| | - C. Fricke
- SIBIS Institute for Social Research and Technology Consulting in Berlin, Berlin, Germany
| |
Collapse
|
49
|
Lang P, Valat P, Horowitz G, Garnier F, Yassar A, Wittmann JC, Lotz B, Meyer S. Orientation et structure de films de sexithiophène (6T) déposés sur couches de PTFE orientées par friction. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1995920963] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
50
|
Nokoff NJ, Palmer B, Mullins AJ, Aston CE, Austin P, Baskin L, Bernabé K, Chan YM, Cheng EY, Diamond DA, Fried A, Frimberger D, Galan D, Gonzalez L, Greenfield S, Kolon T, Kropp B, Lakshmanan Y, Meyer S, Meyer T, Mullins LL, Paradis A, Poppas D, Reddy P, Schulte M, Reyes KJS, Swartz JM, Wolfe-Christensen C, Yerkes E, Wisniewski AB. Prospective assessment of cosmesis before and after genital surgery. J Pediatr Urol 2017; 13:28.e1-28.e6. [PMID: 27887913 PMCID: PMC5894813 DOI: 10.1016/j.jpurol.2016.08.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [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] [Received: 05/18/2016] [Accepted: 08/31/2016] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Little data exist about the surgical interventions taking place for children with disorders of sex development (DSD). Most studies that have evaluated cosmetic outcomes after genitoplasty have included retrospective ratings by a physician at a single center. OBJECTIVE The present study aimed to: 1) describe frequency of sex assignment, and types of surgery performed in a cohort of patients with moderate-to-severe genital ambiguity; and 2) prospectively determine cosmesis ratings by parents and surgeons before and after genital surgery. STUDY DESIGN This prospective, observational study included children aged <2 years of age, with no prior genitoplasty at the time of enrollment, moderate-to-severe genital atypia, and being treated at one of 11 children's hospitals in the United States of America (USA). Clinical information was collected, including type of surgery performed. Parents and the local pediatric urologist rated the cosmetic appearance of the child's genitalia prior to and 6 months after genitoplasty. RESULTS Of the 37 children meeting eligibility criteria, 20 (54%) had a 46,XX karyotype, 15 (40%) had a 46,XY karyotype, and two (5%) had sex chromosome mosaicism. The most common diagnosis overall was congenital adrenal hyperplasia (54%). Thirty-five children had surgery; 21 received feminizing genitoplasty, and 14 had masculinizing genitoplasty. Two families decided against surgery. At baseline, 22 mothers (63%), 14 fathers (48%), and 35 surgeons (100%) stated that they were dissatisfied or very dissatisfied with the appearance of the child's genitalia. Surgeons rated the appearance of the genitalia significantly worse than mothers (P < 0.001) and fathers (P ≤ 0.001) at baseline. At the 6-month postoperative visit, cosmesis ratings improved significantly for all groups (P < 0.001 for all groups). Thirty-two mothers (94%), 26 fathers (92%), and 31 surgeons (88%) reported either a good outcome, or they were satisfied (see Summary Figure); there were no significant between-group differences in ratings. DISCUSSION This multicenter, observational study showed surgical interventions being performed at DSD centers in the USA. While parent and surgeon ratings were discordant pre-operatively, they were generally concordant postoperatively. Satisfaction with postoperative cosmesis does not necessarily equate with satisfaction with the functional outcome later in life. CONCLUSION In this cohort of children with genital atypia, the majority had surgery. Parents and surgeons all rated the appearance of the genitalia unfavorably before surgery, with surgeons giving worse ratings than parents. Cosmesis ratings improved significantly after surgery, with no between-group differences.
Collapse
Affiliation(s)
- N J Nokoff
- Department of Pediatrics, Section of Pediatric Endocrinology, University of Colorado Denver School of Medicine, 13123 East 16th Ave Box B265, Aurora 80045, CO, USA.
| | - B Palmer
- Department of Urology, The University of Oklahoma College of Medicine, 920 Stanton L Young Blvd, WP 3150, Oklahoma City 72104, OK, USA
| | - A J Mullins
- Department of Psychology, Oklahoma State University, 116 North Murray, Stillwater 74078, OK, USA
| | - C E Aston
- Department of Pediatrics, The University of Oklahoma College of Medicine, 920 Stanton L Young Blvd, WP 3150, Oklahoma City 72104, OK, USA
| | - P Austin
- Department of Surgery, Division of Urology, Washington University School of Medicine, 660 South Euclid Ave, Campus Box 8242, St. Louis 63110, MO, USA
| | - L Baskin
- Department of Urology, University of California San Francisco, 400 Parnassus Ave, San Francisco 94143, CA, USA
| | - K Bernabé
- Department of Urology, Weill Cornell Medicine, 525 East 68th St., Box 94, New York 10065, NY, USA
| | - Y-M Chan
- Department of Pediatrics, Division of Endocrinology, Harvard Medical School, 300 Longwood Ave, Boston 02115, MA, USA
| | - E Y Cheng
- Department of Urology, Northwestern University, Feinberg School of Medicine, 225 E Chicago Ave, Box 24, Chicago 60611, IL, USA
| | - D A Diamond
- Department of Urology, Harvard Medical School, 300 Longwood Ave, Boston 02115, MA, USA
| | - A Fried
- Department of Pediatric Urology, Women and Children's Hospital of Buffalo, Buffalo 14222, NY, USA
| | - D Frimberger
- Department of Urology, The University of Oklahoma College of Medicine, 920 Stanton L Young Blvd, WP 3150, Oklahoma City 72104, OK, USA
| | - D Galan
- Department of Urology, Weill Cornell Medicine, 525 East 68th St., Box 94, New York 10065, NY, USA
| | - L Gonzalez
- Pediatric Nephrology and Urology, University of California San Francisco, 400 Parnassus Ave, San Francisco 94143, CA, USA
| | - S Greenfield
- Department of Pediatric Urology, Women and Children's Hospital of Buffalo, Buffalo 14222, NY, USA
| | - T Kolon
- Department of Urology, Perelman School of Medicine, University of Pennsylvania, 34th Street & Civic Center Blvd., Philadelphia 19104, PA, USA
| | - B Kropp
- Department of Urology, The University of Oklahoma College of Medicine, 920 Stanton L Young Blvd, WP 3150, Oklahoma City 72104, OK, USA
| | - Y Lakshmanan
- Department of Urology, Wayne State University School of Medicine, 3901 Beaubien, Detroit 48201, MI, USA
| | - S Meyer
- Department of Pediatric Urology, Women and Children's Hospital of Buffalo, Buffalo 14222, NY, USA
| | - T Meyer
- Department of Urology, Northwestern University, Feinberg School of Medicine, 225 E Chicago Ave, Box 24, Chicago 60611, IL, USA
| | - L L Mullins
- Department of Psychology, Oklahoma State University, 116 North Murray, Stillwater 74078, OK, USA
| | - A Paradis
- Department of Surgery, Division of Urology, Washington University School of Medicine, 660 South Euclid Ave, Campus Box 8242, St. Louis 63110, MO, USA
| | - D Poppas
- Department of Urology, Weill Cornell Medicine, 525 East 68th St., Box 94, New York 10065, NY, USA
| | - P Reddy
- Department of Pediatrics, Division of Pediatric Urology, University of Cincinnati College of Medicine, Cincinnati Children's Hospital Medical Center, MLC 5037, 3333 Burnet Ave, Cincinnati, OH, USA
| | - M Schulte
- Department of Pediatrics, Division of Pediatric Urology, University of Cincinnati College of Medicine, Cincinnati Children's Hospital Medical Center, MLC 5037, 3333 Burnet Ave, Cincinnati, OH, USA
| | - K J Scott Reyes
- Department of Urology, The University of Oklahoma College of Medicine, 920 Stanton L Young Blvd, WP 3150, Oklahoma City 72104, OK, USA
| | - J M Swartz
- Department of Pediatrics, Division of Endocrinology, Harvard Medical School, 300 Longwood Ave, Boston 02115, MA, USA
| | - C Wolfe-Christensen
- Department of Pediatrics, The University of Oklahoma College of Medicine, 920 Stanton L Young Blvd, WP 3150, Oklahoma City 72104, OK, USA; Department of Urology, Wayne State University School of Medicine, 3901 Beaubien, Detroit 48201, MI, USA
| | - E Yerkes
- Department of Urology, Northwestern University, Feinberg School of Medicine, 225 E Chicago Ave, Box 24, Chicago 60611, IL, USA
| | - A B Wisniewski
- Department of Urology, The University of Oklahoma College of Medicine, 920 Stanton L Young Blvd, WP 3150, Oklahoma City 72104, OK, USA; Department of Pediatrics, The University of Oklahoma College of Medicine, 920 Stanton L Young Blvd, WP 3150, Oklahoma City 72104, OK, USA
| |
Collapse
|