1
|
Höing B, Wittig L, Weber L, Stuck BA, Mattheis S, Hussain T, Lang S, Theysohn JM, Li Y, Hansen S. Abdominal ultrasound in head and neck squamous cell carcinoma staging: yes or no? Eur Arch Otorhinolaryngol 2023; 280:1885-1891. [PMID: 36357610 DOI: 10.1007/s00405-022-07723-x] [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: 06/10/2022] [Accepted: 10/25/2022] [Indexed: 11/12/2022]
Abstract
PURPOSE Abdominal ultrasound is a diagnostic staging procedure for distant metastases in head and neck squamous cell carcinoma (HNSCC). However, currently performed abdominal staging procedures do not follow consistent standards. Therefore, this retrospective study on 498 patients aimed at investigating on abdominal ultrasound as a staging procedure in HNSCC. MATERIALS AND METHODS A retrospective analysis of 498 head and neck cancer patients treated in our Department of Head and Neck Surgery between 2008 and 2015 was performed. Disease-related data were collected over a mean follow-up time of 30.3 months, and results of abdominal ultrasound were analyzed. RESULTS 426 patients received abdominal ultrasound as a staging procedure. 7% (29) were suspicious for metastases. In 19 cases (66%), the detected abnormalities were masses of the liver. In four patients, abdominal metastases were confirmed at the time of initial diagnosis. 16 patients developed abdominal metastases in the course of the disease (on average 623 days after initial diagnosis). 19 out of 20 patients with abdominal metastases had an N2/N3 cervical lymph node status. In this study, the negative predictive value of abdominal ultrasound for HNSCC staging was 99.03%, while the positive predictive value yielded 5.88% (N2/N3-patients). CONCLUSION Only in patients with locally advanced lymph-node-status (N2/N3), abdominal ultrasound can be useful as a staging investigation to exclude abdominal metastasis in HNSCC patients. For N0/N1 patients, abdominal ultrasound might be dispensed. Of note, in case of a positive result, further diagnostic procedures are mandatory.
Collapse
Affiliation(s)
- Benedikt Höing
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Essen, University Duisburg-Essen, Hufelandstraße 55, 45147, Essen, Germany.
| | - L Wittig
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - L Weber
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Essen, University Duisburg-Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - B A Stuck
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Marburg, Philipps-Universität Marburg, Marburg, Germany
| | - S Mattheis
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Essen, University Duisburg-Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - T Hussain
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Essen, University Duisburg-Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - S Lang
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Essen, University Duisburg-Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - J M Theysohn
- Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Y Li
- Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - S Hansen
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Essen, University Duisburg-Essen, Hufelandstraße 55, 45147, Essen, Germany
| |
Collapse
|
2
|
Boamah B, Barnsley S, Finch L, Briens J, Siciliano S, Hogan N, Hecker M, Hanson M, Campbell P, Peters R, Manek A, Al-Dissi AN, Weber L. Target Organ Toxicity in Rats After Subchronic Oral Exposure to Soil Extracts Containing a Complex Mixture of Contaminants. Arch Environ Contam Toxicol 2023; 84:85-100. [PMID: 36577861 DOI: 10.1007/s00244-022-00972-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 12/13/2022] [Indexed: 06/17/2023]
Abstract
Complex mixtures of unknown contaminants present a challenge to identify toxicological risks without using large numbers of animals and labor-intensive screens of all organs. This study examined soil extracts from a legacy-contaminated pesticide packaging and blending site. HepG2 cytotoxicity was used as an initial screen of 18 soil samples; then, three extracts (A, B and C) from different locations at the study site were used for testing in animals. The first two extracts were identified as the most toxic in vitro, and the latter extract obtained from a location further from these two toxic sampling sites. Then, target organ toxicities were identified following biweekly oral gavage for one month of three soil extracts (0.1% in polyethylene glycol or PEG) compared to vehicle control in male Sprague-Dawley rats (n = 9-10/group). Exposure to extract A significantly increased neutrophils and lymphocytes compared to control. In contrast, all extracts increased plasma α-2 macroglobulin and caused mild-to-moderate lymphocytic proliferation within the spleen white pulp, all indicative of inflammation. Rats exposed to all soil extracts exhibited acute tubular necrosis. Cholinesterase activity was significantly reduced in plasma, but not brain, after exposure to extract A compared to control. Increased hepatic ethoxyresorufin-o-deethylase activity compared to control was observed following exposure to extracts A and B. Exposure to soil extract C in rats showed a prolonged QTc interval in electrocardiography as well as increased brain lipid peroxidation. Candidate contaminants are organochlorine, organophosphate/carbamate pesticides or metabolites. Overall, HepG2 cytotoxicity did not successfully predict the neurotoxicity and cardiotoxicity observed with extract C but was more successful with suspected hydrocarbon toxicities in extracts A and B. Caution should be taken when extrapolating the observation of no effects from in vitro cell culture to in vivo toxicity, and better cell culture lines or assays should be explored.
Collapse
Affiliation(s)
- B Boamah
- Toxicology Centre, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
| | - S Barnsley
- Toxicology Centre, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
| | - L Finch
- Toxicology Centre, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
| | - J Briens
- Toxicology Centre, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
| | - S Siciliano
- Toxicology Centre, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
| | - N Hogan
- Toxicology Centre, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
| | - M Hecker
- Toxicology Centre, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
| | - M Hanson
- Environment and Geography, University of Manitoba, Winnipeg, MB, Canada
| | - P Campbell
- Wood Environment & Infrastructure Solutions, Winnipeg, MB, Canada
| | - R Peters
- Federated Co-Operatives Limited, Saskatoon, SK, Canada
| | - A Manek
- College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - A N Al-Dissi
- Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - L Weber
- Toxicology Centre, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada.
| |
Collapse
|
3
|
Weber L, Sokolska JM, Nadarevic T, Karolyi M, Baessler B, Fischer X, Sokolski M, von Spiczak J, Polacin M, Matziris I, Alkadhi H, Manka R. Correction: Impact of myocardial injury on regional left ventricular function in the course of acute myocarditis with preserved ejection fraction: insights from segmental feature tracking strain analysis using cine cardiac MRI. Int J Cardiovasc Imaging 2022. [DOI: 10.1007/s10554-022-02697-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
4
|
Weber L, Sokolska JM, Nadarevic T, Karolyi M, Baessler B, Fischer X, Sokolski M, von Spiczak J, Polacin M, Matziris I, Alkadhi H, Robert M. Impact of myocardial injury on regional left ventricular function in the course of acute myocarditis with preserved ejection fraction: insights from segmental feature tracking strain analysis using cine cardiac MRI. Int J Cardiovasc Imaging 2022; 38:1851-1861. [PMID: 37726513 PMCID: PMC9797452 DOI: 10.1007/s10554-022-02601-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 03/14/2022] [Indexed: 11/05/2022]
Abstract
The aim of this study was to provide insights into myocardial adaptation over time in myocyte injury caused by acute myocarditis with preserved ejection fraction. The effect of myocardial injury, as defined by the presence of late gadolinium enhancement (LGE), on the change of left ventricular (LV) segmental strain parameters was evaluated in a longitudinal analysis. Patients with a first episode of acute myocarditis were enrolled retrospectively. Peak radial (PRS), longitudinal (PLS) and circumferential (PCS) LV segmental strain values at baseline and at follow-up were computed using feature tracking cine cardiac magnetic resonance imaging. The change of segmental strain values in LGE positive (LGE+) and LGE negative (LGE-) segments was compared over a course of 89 ± 20 days. In 24 patients, 100 LGE+ segments and 284 LGE- segments were analysed. Between LGE+ and LGE- segments, significant differences were found for the change of segmental PCS (p < 0.001) and segmental PRS (p = 0.006). LGE + segments showed an increase in contractility, indicating recovery, and LGE- segments showed a decrease in contractility, indicating normalisation after a hypercontractile state or impairment of an initially normal contracting segment. No significant difference between LGE+ and LGE- segments was found for the change in segmental PLS. In the course of acute myocarditis with preserved ejection fraction, regional myocardial function adapts inversely in segments with and without LGE. As these effects seem to counterbalance each other, global functional parameters might be of limited use in monitoring functional recovery of these patients.
Collapse
Affiliation(s)
- L Weber
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Raemistrasse 100, 8091, Zurich, Switzerland
- Department of Radiology, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - J M Sokolska
- Department of Cardiology, University Heart Center, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Department of Heart Diseases, Wroclaw Medical University, Wroclaw, Poland
| | - T Nadarevic
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Raemistrasse 100, 8091, Zurich, Switzerland
- Department of Radiology, University Hospital Centre Rijeka, Rijeka, Croatia
| | - M Karolyi
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Raemistrasse 100, 8091, Zurich, Switzerland
| | - B Baessler
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Raemistrasse 100, 8091, Zurich, Switzerland
| | - X Fischer
- Department of Sport, Exercise and Health, University of Basel, Basel, Switzerland
| | - M Sokolski
- Department of Cardiology, University Heart Center, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Department of Heart Diseases, Wroclaw Medical University, Wroclaw, Poland
| | - J von Spiczak
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Raemistrasse 100, 8091, Zurich, Switzerland
- Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland
| | - M Polacin
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Raemistrasse 100, 8091, Zurich, Switzerland
- Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland
| | - I Matziris
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Raemistrasse 100, 8091, Zurich, Switzerland
| | - H Alkadhi
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Raemistrasse 100, 8091, Zurich, Switzerland
| | - M Robert
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Raemistrasse 100, 8091, Zurich, Switzerland.
- Department of Cardiology, University Heart Center, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
- Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland.
| |
Collapse
|
5
|
Weber L, Pilz PM, Baumgartner N, Szabo PL, Arnold Z, Dostal C, Kiss A, Podesser BK. Dapagliflozin alleviates left ventricular hypertrophy and cardiac dysfunction in mice. Cardiovasc Res 2022. [DOI: 10.1093/cvr/cvac066.097] [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
Funding Acknowledgements
Type of funding sources: Public Institution(s). Main funding source(s): Ludwig Boltzmann Institute for Cardiovascular Research
Introduction
Sodium glucose cotransporter 2 inhibitors (SGLT2i) are a class of oral antidiabetic drugs. Recent clinical trials demonstrated and proved the cardiovascular benefit of SGLT2i in patients suffering from ischemic heart disease. In addition, left ventricular hypertrophy (LVH) is associated with cardiovascular events and using SGLT2i alleviated LVH in diabetic patients. However, only few studies investigated the effect of SGLT2i on regression of LVH in absence of diabetes.
Aim of the study
This study aimed to investigate whether the SGLT2i Dapagliflozin (DAPA) could attenuate LVH and cardiac dysfunction in a mouse model of pressure overload-induced LVH.
Methods
Male C57BL/6J mice (body weight 20-25g) were used. LVH was induced surgically by transverse aortic constriction (TAC). DAPA (1 mg/kg bodyweight/day) was administered through drinking water. The animals were divided in four groups: Group 1 underwent TAC for eight weeks (n=8). Group 2 concomitantly received DAPA for eight weeks after TAC (n=5). Group 3 received DAPA for only two weeks (in week 7 and 8 after TAC, n=5) to clarify if DAPA treatment could alleviate LVH at a later timepoint. Group 4 served as a sham control group (no LVH, n=8). Cardiac function was assessed using transthoracic echocardiography and invasive LV hemodynamic measurements.
Results
TAC resulted in a significant reduction in LV ejection fraction (LVEF) and significant increase in heart weight to body weight ratio (HW/BW) compared to sham (p<0.001). In addition, TAC mice showed a significant increase of LV systolic pressure and end-diastolic pressure compared to sham (p<0.01). Both the LVEF and LV functional parameters were markedly improved in mice treated with DAPA for eight weeks (p<0.05). LV mass decreased compared to the untreated group. More importantly, DAPA treatment for only two weeks also improved LVEF and alleviated LVH compared to untreated TAC mice (p<0.05). Furthermore, we also found that mice with only two weeks of DAPA treatment showed a tendency to improve LV hemodynamics.
Conclusions
DAPA was cardioprotective in a mouse model of pressure overload-induced LVH in absence of diabetes. It improved LV contractile function and LVH. DAPA also alleviated LVH and induced LV regression. Our findings uncovered that the SGLT2i DAPA contributed to the regression of LVH and cardiac fibrosis. Thus, administration of SLGT2i may be a novel adjunct therapy to boost reverse remodeling e.g. in patients with elective cardiac surgery and hypertrophic cardiomyopathy.
Collapse
Affiliation(s)
- L Weber
- Ludwig Boltzmann Cluster for Cardiovascular Research , Vienna , Austria
| | - PM Pilz
- School of Medicine , Stanford , United States of America
| | - N Baumgartner
- Ludwig Boltzmann Cluster for Cardiovascular Research , Vienna , Austria
| | - PL Szabo
- Ludwig Boltzmann Cluster for Cardiovascular Research , Vienna , Austria
| | - Z Arnold
- Ludwig Boltzmann Cluster for Cardiovascular Research , Vienna , Austria
| | - C Dostal
- Ludwig Boltzmann Cluster for Cardiovascular Research , Vienna , Austria
| | - A Kiss
- Ludwig Boltzmann Cluster for Cardiovascular Research , Vienna , Austria
| | - BK Podesser
- Ludwig Boltzmann Cluster for Cardiovascular Research , Vienna , Austria
| |
Collapse
|
6
|
Wolner L, Szabo PL, Inci M, Weber L, Kiss A, Podesser BK. St Thomas Hospital polarizing cold cardioplegia does not have superior effects on hemodynamic parameters in an infarcted rat model. Cardiovasc Res 2022. [DOI: 10.1093/cvr/cvac066.065] [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
Funding Acknowledgements
Type of funding sources: Private company. Main funding source(s): Orphan Drugs
Background
The use of cardioplegic solutions is indispensable during cardiac arrest in order to reduce myocardial metabolism and oxygen demand. Most commonly, hypothermic hyperkalemic cardioplegic solutions are used for open heart surgery. However, high potassium concentrations have several effects that limit left ventricular recovery, such as intracellular calcium overload resulting in the loss of contractility and increased cell death. Recently, we have shown that polarized cardiac arrest results in similar myocardial protection and improves cardiac functional recovery in a porcine model of cardiopulmonary bypass.
Purpose
The purpose of this study was to identify and compare the hemodynamic effects of cold St Thomas’ Hospital polarizing cardioplegia (STH-Pol) in contrast to standard St Thomas’ Hospital cardioplegia (STH2) in rats with chronic myocardial infarction. We hypothesize that St Thomas’ Hospital polarizing cardioplegia shows superior protection on left ventricular hemodynamic recovery as compared to standard STH2 cardioplegia.
Methods
Permanent myocardial infarction was induced by permanent occlusion of the left anterior descending artery LAD on Sprague-Dawley rats (593 ± 65g, day of sacrifice). Six weeks post-MI, after echocardiography assessment, the animals were sacrificed, and hemodynamic parameters were measured in an erythrocyte-perfused isolated heart model (STH2, control group: n=5 or STH-Pol, study group: n=4). Fifteen minutes of Langendorff mode and 30 minutes of Working-heart mode were followed by cardiac arrest with the two types cardioplegia (was applied three times every 20 minutes (t1= 0, t2= 20, t3= 40)). STH-Pol, consisting of esmolol, adenosine and magnesium, was mixed with erythrocyte-buffer shortly prior to administration (1:4). After ischemia, the hearts were started with a hot shot with warm erythrocyte-buffer. Hemodynamic parameters were measured every five minutes in Langendorff mode and Working-heart mode. Finally, pump function was examined and tissue samples were taken for analysis of troponin-T and high-energy phosphates. Results will be given as % of preischemic baseline value.
Results
The use of STH-Pol instead of STH2 did not yield any significant differences in hemodynamic recovery (%) across the parameters of left atrial flow (LAF: 40.87 ± 13.22 vs. 53.24 ± 11.27), coronary flow (CF: 58 ± 14.36 vs. 76.21 ± 9) and cardiac output (CO: 42.82 ± 13.36 vs. 51.83 ± 11.76). Furthermore, we have not been able to identify superior effects of STH-Pol on stroke volume (SV: 46.55 ± 13.91 vs. 52.66 ± 11.33) recovery. Moreover, heart rate was comparable in both groups (92.07 ± 2.02 vs. 99.35 ± 1.72), which indicates swift reversal of negative chronotropic effects of esmolol.
Conclusion
Polarizing cardioplegic arrest does not show superior effects on hemodynamic parameters of left ventricular recovery after ischemia in chronically infarcted rat hearts as compared to depolarizing cardioplegic arrest.
Collapse
Affiliation(s)
- L Wolner
- Ludwig Boltzmann Cluster for Cardiovascular Research , Vienna , Austria
| | - PL Szabo
- Ludwig Boltzmann Cluster for Cardiovascular Research , Vienna , Austria
| | - M Inci
- Ludwig Boltzmann Cluster for Cardiovascular Research , Vienna , Austria
| | - L Weber
- Ludwig Boltzmann Cluster for Cardiovascular Research , Vienna , Austria
| | - A Kiss
- Ludwig Boltzmann Cluster for Cardiovascular Research , Vienna , Austria
| | - BK Podesser
- Ludwig Boltzmann Cluster for Cardiovascular Research , Vienna , Austria
| |
Collapse
|
7
|
Gili Sole L, Reid G, Perera M, Acar E, Weber L, Szabo LP, Pilz P, Eckstein F, Santer D, Friske J, Podesser B, Helbich TH, Kiss A, Marsano A. Stromal Vascular Fraction-based patches generated under perfusion culture enhance cardiac function in rats with chronic myocardial infarction. Cardiovasc Res 2022. [DOI: 10.1093/cvr/cvac066.088] [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
Funding Acknowledgements
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Swiss National Foundation
The development of novel adjuvant angiogenic therapies to restore the low-perfused microvascular network upon myocardial infarction (MI) is crucial to avoid a possible end-stage heart failure. Of the current adult cell-based therapies, human adipose tissue-derived stromal vascular fraction cell (SVF) has vast reparative potential, principally due to: 1) its heterogeneous composition rich in mesenchymal stem cells (MSC), endothelial cells (EC), pericytes and hematopoietic cells, among others. In vitro engineering of SVF-based patches under unidirectional flow, applied by the help of a perfusion-based bioreactor, was found to increase certain cellular SVF subgroups such as pericytes, compared to static culture. In this study, we aimed at studying the potential of SVF-based engineered tissues in a model of chronic MI in nude rats. Human SVF cells were isolated upon liposuction and cultured on 3D collagen sponges (8 mm diameter, 3 mm thickness) either under constant unidirectional perfusion or in static condition for 5 days. Patches were characterized in terms of cellular composition prior to implantation. MI was induced by permanent ligation of the left anterior descending (LAD) coronary artery in male nude rats. Cardiac MRI was performed 4 weeks after MI; prior to the suture of patches and before sacrifice (4 weeks after implantation). Left ventricular ejection fraction (EF) was the surrogate marker and primary end point for cardiac pump function. Controls included untreated MI animals. Following perfusion culture, SVF cells were composed with a statistically superior percentage of pericytes, identified as CD45- CD34- CD146+ compared to static culture (28.06±10.03 and 3.37±2.50, respectively, p<0.0007). The presence of other cell subpopulations was similar in the patches generated in perfusion or static culture. While the percentage of EF at the time of sacrifice resulted to be not statistically different between static and perfusion-based patches, statically generated constructs showed a general trend of decrease in the % EF before and after treatment (rat 1: 61.96 vs 52.90; rat 2: 55.39 vs 53.00; rat 3: 52.34 vs 50.62, respectively). Perfusion-cultured patches, instead, rather improved the cardiac function, measured as % EF (rat 1: 51.82 vs 58.72; rat 2: 51.66 vs 60.45; rat 3: 53.50 vs 52. 36, respectively for 4 weeks following MI and 4 weeks following treatment). When comparing the ratio of the % EF 8 weeks and 4 weeks between static or perfusion-based patches and the untreated controls, rats treated with patches generated under perfusion resulted to show higher levels of % EF, with an almost statistically difference (p=0.0556), compared to the control group. The observed results showed the great potential of human SVF-based patches in the improvement of the heart pump function.
Collapse
Affiliation(s)
- L Gili Sole
- University Hospital Basel , Basel , Switzerland
| | - G Reid
- University Hospital Basel , Basel , Switzerland
| | - M Perera
- Medical University of Vienna AKH , Vienna , Austria
| | - E Acar
- Medical University of Vienna AKH , Vienna , Austria
| | - L Weber
- University Hospital Basel , Basel , Switzerland
| | - L P Szabo
- Medical University of Vienna AKH , Vienna , Austria
| | - P Pilz
- Medical University of Vienna AKH , Vienna , Austria
| | - F Eckstein
- University Hospital Basel , Basel , Switzerland
| | - D Santer
- University Hospital Basel , Basel , Switzerland
| | - J Friske
- Medical University of Vienna AKH , Vienna , Austria
| | - B Podesser
- Medical University of Vienna AKH , Vienna , Austria
| | - T H Helbich
- Medical University of Vienna AKH , Vienna , Austria
| | - A Kiss
- Medical University of Vienna AKH , Vienna , Austria
| | - A Marsano
- University Hospital Basel , Basel , Switzerland
| |
Collapse
|
8
|
Guyot S, Dellis P, Hurson C, Weber L, Schneider M, Farjallah A, de Blay F, Metz-Favre C. Hypersensibilité au vaccin anti-COVID ? analyses de 1000 avis allergologiques. Revue Française d'Allergologie 2022. [PMCID: PMC9126015 DOI: 10.1016/j.reval.2022.02.069] [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] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Introduction (contexte de la recherche) Les services d’allergologie ont été fortement sollicités en raison de l’appréhension vis-à-vis du risque allergique des vaccins contre la COVID-19. Objectif Nous rapportons les 1000 premières prises en charge proposées et le résultat des investigations allergologiques réalisées. Méthodes Nous avons mis en place un système d’avis-COVID par mail à l’aide d’un questionnaire. Ceci nous a permis de colliger, de façon rétrospective les données démographiques des patients, les conduites à tenir proposées, en fonction des données cliniques fournies et des recommandations de la SFA. Pour certains, des tests cutanés ont été nécessaires : prick-test aux PEGs 3500/1500 et polysorbate 80 avec des concentrations maximales respectives de 100 mg/mL et 1000 mg/mL. Lorsque des fonds de flacon de vaccin étaient disponibles, nous avons réalisé : prick-test et IDR jusqu’à leur concentration pure. Certaines vaccinations jugées à risque ont été réalisées dans le service. Résultats Du 20 janvier au 24 novembre 2021, 1000 avis allergologiques ont été donnés par mail en dehors des heures de consultation. Il s’agissait de 773 avis pré-vaccinaux et 227 post-vaccinaux. L’âge moyen des patients était de 55 ans, avec une majorité de femmes. Nous avons levé la contre-indication allergologique à la vaccination dans 99,4 % des cas. Elle a été recommandée en centre de vaccination conventionnel pour 44 % sans précaution particulière, 31 % sous antihistaminique, 30 % avec 30 minutes de surveillance. 31 patients ont été vaccinés dans notre service sans réaction. L’indication de tests cutanés a été retenue dans 6,9 % des cas. Nous avons mis en évidence une sensibilisation aux excipients et aux vaccins chez 4 patients du groupe pré-vaccinal et chez une patiente du groupe post-vaccinal qui a bénéficié d’une désensibilisation avec succès. Conclusions La gestion par mail des avis-COVID a permis de limiter les consultations dédiées en présentiel et de maintenir l’intégralité des activités du service. Nous avons proposé une réponse rapide avec traçabilité écrite, souvent exigée. Seuls 4 patients restent à ce jour contre-indiqués à la vaccination en raison d’une allergie aux PEGs.
Collapse
|
9
|
Gepp S, Gök S, Jung L, Kreitlow A, Machleid F, Nordmann K, Weber L. Global health from home - results from a German student-led online lecture series during COVID-19. Eur J Public Health 2021. [DOI: 10.1093/eurpub/ckab164.228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Background
The COVID-19 pandemic calls for a skilled health workforce, yet global health is largely missing in the medical curriculum in Germany. The interdisciplinary national student “Global Health Network” therefore initiated an online lecture series. “Global Health - perspectives, opportunities and challenges” included 14 lectures on a range of topics held by German and international academics from October 2020 to January 2021.
Methods
Evaluations were performed prior to, at midterm and after the series, including 5-point likert scales and open questions. Using quantitative and qualitative approaches, participants' motivation and learning outcomes of global health education were analysed.
Results
A total of 1393 students registered for the series. Individual lectures attracted on average 400 participants, mainly female medical students between 20-25 years, but also a variety of ages, genders and disciplines. Main reasons for participation included interest in COVID-19-related developments, learning about global health-specific topics, and professional development. More than 40% of participants reported to know little about global health before attending; after the lecture series, only 10% made this statement. In addition, 90% of participants perceived an increase of motivation to learn more about the topics, while about 40% gained motivation to become practically involved in the field. The lecture series was accredited in the curriculum at some universities, thus innovating the curriculum and enabling formal credits.
Conclusions
The new model of student-led online teaching proved to be feasible and demonstrated students' interest and positive impact on global health knowledge. Further institutional change and inclusion of global health in the curricula have to follow.
Key messages
Students need global health education to respond to global health-related challenges. Volunteer student-led initiatives can increase knowledge and interest and be an important driver for change towards improving global health education.
Collapse
Affiliation(s)
- S Gepp
- German Medical Students’ Association - bvmd, Berlin, Germany
| | - S Gök
- German Medical Students’ Association - bvmd, Berlin, Germany
| | - L Jung
- German Medical Students’ Association - bvmd, Berlin, Germany
| | - A Kreitlow
- German Medical Students’ Association - bvmd, Berlin, Germany
| | - F Machleid
- German Medical Students’ Association - bvmd, Berlin, Germany
| | - K Nordmann
- German Medical Students’ Association - bvmd, Berlin, Germany
| | - L Weber
- German Medical Students’ Association - bvmd, Berlin, Germany
| |
Collapse
|
10
|
Karolyi M, Kolossvary M, Weber L, Matziris I, Sokolska J, Alkadhi H, Manka R. Localization of ST-elevation on ECG is associated with regional myocardial fibrosis in acute myocarditis. Eur Heart J Cardiovasc Imaging 2021. [DOI: 10.1093/ehjci/jeab090.063] [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
Funding Acknowledgements
Type of funding sources: None.
Introduction
Both ST elevation (STE) on ECG and late gadolinium enhancement (LGE) on cardiac magnetic resonance imaging (CMR) are related to poor outcome in myocarditis.
Purpose
We evaluated if there is an association between regional STE and LGE pattern in patients with suspected myocarditis.
Methods
51 patients (42 male, 32 ± 13 years old) underwent 12-lead ECG and CMR with LGE due to suspected myocarditis. >1mm STE was assessed in the antero-septal (V1-V4, aVR), inferior (II, III, aVF) and lateral (I, aVL, V5-V6) localizations. LGE was quantified as visual presence score (VPS) (1-17) and visual transmurality score (VTS) (1-68) on CMR, according to the 17-segment AHA model. STE and LGE were correlated using linear regression analysis.
Results
31% of the patients had STE on admission ECG and a median VPS of 3 (IQR: 1-5) and VTS of 6 (IQR: 3-11) on CMR. STE showed an association with VPS and VTS in univariate and multivariate analysis (p < 0.001 all). STE was most frequent in the lateral and inferior leads (48% and 31%) which correlated with regional VPS and VTS in univariate model (p < 0.05 all), and remained significant in multivariate analysis for VPS (p < 0.05 both). STE was less frequent in the antero-septal region (21%, where no association between LGE and STE could be revealed (p > 0.05 all).
Conclusions
Inferior and lateral STE in myocarditis is associated with regional LGE on CMR, which is an indicator of myocardial fibrosis and possible poor outcome. Our results need not be validated on larger cohorts with follow-up.
Collapse
Affiliation(s)
- M Karolyi
- University of Zurich, Zurich, Switzerland
| | - M Kolossvary
- Semmelweis University Heart and Vascular Center, Budapest, Hungary
| | - L Weber
- Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - I Matziris
- University of Zurich, Zurich, Switzerland
| | - J Sokolska
- University of Zurich, Zurich, Switzerland
| | - H Alkadhi
- University of Zurich, Zurich, Switzerland
| | - R Manka
- University of Zurich, Zurich, Switzerland
| |
Collapse
|
11
|
Sokolska J, Karolyi M, Bataiosu D, Gastl M, Weber L, Sokolski M, Gruner C, Manka R. Myocardial fibrosis quantification methods by cardiovascular magnetic resonance imaging with contrast-enhancement in patients with Fabry disease. Eur Heart J Cardiovasc Imaging 2021. [DOI: 10.1093/ehjci/jeab090.022] [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
Funding Acknowledgements
Type of funding sources: Public grant(s) – EU funding. Main funding source(s): National Agency for Academic Exchange (NAWA).
Background. Presence and extent of late gadolinium enhancement (LGE) in patients with Fabry disease (FD) is a predictor of adverse cardiac events. However there is no gold standard method to quantify the amount of myocardial fibrosis in cardiac magnetic resonance imaging (CMR).
Purpose. The aim of this study was to establish the most reliable and reproducible technique for quantifying LGE in patients with FD.
Methods. 68 patients with FD (40% male, 40 ± 16 years old) treated in our outpatient clinic, who underwent CMR with administration of 0.2 mmol of gadobutrol per kilogram of body weight between December 2012 and March 2019 were enrolled into the study. Presence of LGE was described in 25 patients (37%). Twenty patients underwent CMR with the same LGE sequence (Philips 1.5 Tesla, two-dimensional multi-breath-hold inversion recovery sequence) and were enrolled into further analysis. LGE quantifications were performed using gray-scale thresholds with 2, 3, 4, 5 and 6 standard deviations (SD) above the mean signal intensity for the remote myocardial tissue, full width at half maximum method (FWHM), visual assessment with threshold (VAT) and fully manual method (MM; Philips IntelliSpace Portal 10). LGE quantifications were done twice by the same observer in different time periods and once by another observer. Intraclass correlation coefficient (ICC), Bland- Altman analysis and coefficient of variation (CV) were used to assess intra- and interobserver reliability and reproducibility.
Results. The mean quantity of fibrosis mass (in gram) in all studied patients was: 35.5 ± 18.7 at 2SD, 21.0 ± 12.8 at 3SD, 12.7 ± 8.5 at 4SD, 8.0 ± 5.7 at 5SD, 5.3 ± 4.1 at 6SD, 1.9 ± 1.8 at FWHM, 8.6 ± 7.4 at VAT and 9.1 ± 6.1 at MM. Intra-observer reliability of almost all studied LGE quantification methods was excellent, with a range of ICCs from 0.90 for 6SD to 0.95 for VAT, with one exception for FWHM, which had good intraobserver reliability (ICC 0.84; all P < 0.05). Interobserver reliability was excellent for VAT (ICC 0.94) and good for all other LGE quantifications methods (range of ICCs from 0.76 for MM to 0.87 for 5SD, all P < 0.05). 5SD had the lowest CV (6%) for intraobserver reproducibility and 2SD and VAT for interobserver reproducibility (35% and 38%). FWHM had the highest CV for both intra- and interobserver reproducibility (63% and 94%, accordingly).
Conclusions
1. All studied methods of LGE quantification in patients with FD and presence of myocardial fibrosis have good to excellent intra- and interobserver reliability.
2. The total amount of LGE differs in studied LGE quantifications methods. Therefore in clinical practice it is important to report which technique of LGE quantification was used and choose the same for CMR-follow up.
3. FWHM might be avoided for LGE quantification in patients with FD due to the highest intra- and interobserver variability in comparison to other available techniques.
Collapse
Affiliation(s)
- J Sokolska
- Wroclaw Medical University, Department of Heart Diseases, Wroclaw, Poland
| | - M Karolyi
- University Hospital Zurich, Institute of Diagnostic and Interventional Radiology, Zurich, Switzerland
| | - D Bataiosu
- University Hospital Zurich, University Heart Center, Department of Cardiology, Zurich, Switzerland
| | - M Gastl
- Heinrich Heine University, Department of Cardiology, Pulmonology and Vascular Medicine, Duesseldorf, Germany
| | - L Weber
- University Hospital Zurich, Institute of Diagnostic and Interventional Radiology, Zurich, Switzerland
| | - M Sokolski
- Wroclaw Medical University, Department of Heart Diseases, Wroclaw, Poland
| | - C Gruner
- University Hospital Zurich, University Heart Center, Department of Cardiology, Zurich, Switzerland
| | - R Manka
- University Hospital Zurich, University Heart Center, Department of Cardiology, Zurich, Switzerland
| |
Collapse
|
12
|
Jiménez JL, Crone SPG, Fogh E, Zayed ME, Lortz R, Pomjakushina E, Conder K, Läuchli AM, Weber L, Wessel S, Honecker A, Normand B, Rüegg C, Corboz P, Rønnow HM, Mila F. A quantum magnetic analogue to the critical point of water. Nature 2021; 592:370-375. [PMID: 33854247 DOI: 10.1038/s41586-021-03411-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 02/26/2021] [Indexed: 02/02/2023]
Abstract
At the liquid-gas phase transition in water, the density has a discontinuity at atmospheric pressure; however, the line of these first-order transitions defined by increasing the applied pressure terminates at the critical point1, a concept ubiquitous in statistical thermodynamics2. In correlated quantum materials, it was predicted3 and then confirmed experimentally4,5 that a critical point terminates the line of Mott metal-insulator transitions, which are also first-order with a discontinuous charge carrier density. In quantum spin systems, continuous quantum phase transitions6 have been controlled by pressure7,8, applied magnetic field9,10 and disorder11, but discontinuous quantum phase transitions have received less attention. The geometrically frustrated quantum antiferromagnet SrCu2(BO3)2 constitutes a near-exact realization of the paradigmatic Shastry-Sutherland model12-14 and displays exotic phenomena including magnetization plateaus15, low-lying bound-state excitations16, anomalous thermodynamics17 and discontinuous quantum phase transitions18,19. Here we control both the pressure and the magnetic field applied to SrCu2(BO3)2 to provide evidence of critical-point physics in a pure spin system. We use high-precision specific-heat measurements to demonstrate that, as in water, the pressure-temperature phase diagram has a first-order transition line that separates phases with different local magnetic energy densities, and that terminates at an Ising critical point. We provide a quantitative explanation of our data using recently developed finite-temperature tensor-network methods17,20-22. These results further our understanding of first-order quantum phase transitions in quantum magnetism, with potential applications in materials where anisotropic spin interactions produce the topological properties23,24 that are useful for spintronic applications.
Collapse
Affiliation(s)
- J Larrea Jiménez
- Laboratory for Quantum Matter under Extreme Conditions, Institute of Physics, University of São Paulo, São Paulo, Brazil.,Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - S P G Crone
- Institute for Theoretical Physics, University of Amsterdam, Amsterdam, The Netherlands.,Delta Institute for Theoretical Physics, University of Amsterdam, Amsterdam, The Netherlands
| | - E Fogh
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - M E Zayed
- Department of Physics, Carnegie Mellon University in Qatar, Doha, Qatar
| | - R Lortz
- Department of Physics, Hong Kong University of Science and Technology, Kowloon, Hong Kong
| | - E Pomjakushina
- Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, Villigen-PSI, Switzerland
| | - K Conder
- Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, Villigen-PSI, Switzerland
| | - A M Läuchli
- Institut für Theoretische Physik, Universität Innsbruck, Innsbruck, Austria
| | - L Weber
- Institut für Theoretische Festkörperphysik, RWTH Aachen University, Aachen, Germany
| | - S Wessel
- Institut für Theoretische Festkörperphysik, RWTH Aachen University, Aachen, Germany
| | - A Honecker
- Laboratoire de Physique Théorique et Modélisation, CNRS UMR 8089, CY Cergy Paris Université, Cergy-Pontoise, France
| | - B Normand
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.,Paul Scherrer Institute, Villigen-PSI, Switzerland
| | - Ch Rüegg
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.,Paul Scherrer Institute, Villigen-PSI, Switzerland.,Institute for Quantum Electronics, ETH Zürich, Hönggerberg, Switzerland.,Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland
| | - P Corboz
- Institute for Theoretical Physics, University of Amsterdam, Amsterdam, The Netherlands.,Delta Institute for Theoretical Physics, University of Amsterdam, Amsterdam, The Netherlands
| | - H M Rønnow
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
| | - F Mila
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| |
Collapse
|
13
|
Suhr M, Lehmann C, Bauer CR, Bender T, Knopp C, Freckmann L, Öst Hansen B, Henke C, Aschenbrandt G, Kühlborn LK, Rheinländer S, Weber L, Marzec B, Hellkamp M, Wieder P, Sax U, Kusch H, Nussbeck SY. Menoci: lightweight extensible web portal enhancing data management for biomedical research projects. BMC Bioinformatics 2020; 21:582. [PMID: 33334310 PMCID: PMC7745495 DOI: 10.1186/s12859-020-03928-1] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 12/09/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Biomedical research projects deal with data management requirements from multiple sources like funding agencies' guidelines, publisher policies, discipline best practices, and their own users' needs. We describe functional and quality requirements based on many years of experience implementing data management for the CRC 1002 and CRC 1190. A fully equipped data management software should improve documentation of experiments and materials, enable data storage and sharing according to the FAIR Guiding Principles while maximizing usability, information security, as well as software sustainability and reusability. RESULTS We introduce the modular web portal software menoci for data collection, experiment documentation, data publication, sharing, and preservation in biomedical research projects. Menoci modules are based on the Drupal content management system which enables lightweight deployment and setup, and creates the possibility to combine research data management with a customisable project home page or collaboration platform. CONCLUSIONS Management of research data and digital research artefacts is transforming from individual researcher or groups best practices towards project- or organisation-wide service infrastructures. To enable and support this structural transformation process, a vital ecosystem of open source software tools is needed. Menoci is a contribution to this ecosystem of research data management tools that is specifically designed to support biomedical research projects.
Collapse
Affiliation(s)
- M Suhr
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany.
| | - C Lehmann
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
| | - C R Bauer
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
| | - T Bender
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
| | - C Knopp
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
| | - L Freckmann
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
| | - B Öst Hansen
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
| | - C Henke
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
| | - G Aschenbrandt
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
| | - L K Kühlborn
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
| | - S Rheinländer
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
| | - L Weber
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
| | - B Marzec
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
| | - M Hellkamp
- GWDG, Gesellschaft für Wissenschaftliche Datenverarbeitung mbH Göttingen, Am Faßberg 11, 37077, Göttingen, Germany
| | - P Wieder
- GWDG, Gesellschaft für Wissenschaftliche Datenverarbeitung mbH Göttingen, Am Faßberg 11, 37077, Göttingen, Germany
| | - U Sax
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
| | - H Kusch
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
- Department of Molecular Biology, University Medical Center Göttingen, Humboldtallee 23, 37075, Göttingen, Germany
| | - S Y Nussbeck
- Department of Medical Informatics, University Medical Center Göttingen, von-Siebold-Str. 3, 37075, Göttingen, Germany
- University Medical Center Göttingen, UMG Biobank, Robert-Koch-Str. 40, 37075, Göttingen, Germany
| |
Collapse
|
14
|
Eberhard M, Schönenberger ALN, Hinzpeter R, Euler A, Sokolska J, Weber L, Kuzo N, Manka R, Kasel AM, Tanner FC, Alkadhi H. Mitral annular calcification in the elderly - Quantitative assessment. J Cardiovasc Comput Tomogr 2020; 15:161-166. [PMID: 32798185 DOI: 10.1016/j.jcct.2020.06.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 04/01/2020] [Revised: 05/04/2020] [Accepted: 06/01/2020] [Indexed: 11/24/2022]
Abstract
PURPOSE To determine the reliability of subjective and objective quantification of mitral annular calcification (MAC) in elderly patients with severe aortic stenosis, to define quantitative sex- and age-related reference values of MAC, and to correlate quantitative MAC with mitral valve disease. METHODS In this retrospective, IRB-approved study, we included 559 patients (268 females, median age 81 years, inter-quartile range 77-85 years) with severe aortic stenosis undergoing CT. Four independent readers performed subjective MAC categorization as follows: no, mild, moderate, and severe MAC. Two independent readers performed quantitative evaluation of MAC using the Agatston score method (AgatstonMAC). Mitral valve disease was determined by echocardiography. RESULTS Subjective MAC categorization showed high inter-reader agreement for no (k = 0.88) and severe MAC (k = 0.75), whereas agreement for moderate (k = 0.59) and mild (k = 0.45) MAC was moderate. Intra-reader agreement for subjective MAC categorization was substantial (k = 0.69 and 0.62). Inter- and intra-reader agreement for AgatstonMAC were excellent (ICC = 0.998 and 0.999, respectively), with minor inconsistencies in MAC involving the left ventricular outflow tract/aortic valve. There were significantly more women than men with MAC (n = 227, 85% versus n = 209, 72%; p < 0.001), with a significantly higher AgatstonMAC (median 597, range 81-2055 versus median 244; range 0-1565; p < 0.001), particularly in patients ≥85 years of age. AgatstonMAC showed an area-under-the-curve of 0.84 to diagnose mitral stenosis, whereas there was no association of AgatstonMAC with mitral regurgitation (p > 0.05). CONCLUSIONS Our study in elderly patients with severe aortic stenosis shows that quantitative MAC scoring is more reliable than subjective MAC assessment. Women show higher AgatstonMAC scores than men, particularly in the elderly population. AgatstonMAC shows high accuracy to diagnose mitral stenosis.
Collapse
Affiliation(s)
- M Eberhard
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Switzerland.
| | - A L N Schönenberger
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Switzerland
| | - R Hinzpeter
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Switzerland
| | - A Euler
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Switzerland
| | - J Sokolska
- Department of Cardiology, University Heart Center Zurich, Zurich, Switzerland; Department of Heart Diseases, Wroclaw Medical University, Wroclaw, Poland
| | - L Weber
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Switzerland
| | - N Kuzo
- Department of Cardiology, University Heart Center Zurich, Zurich, Switzerland
| | - R Manka
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Switzerland; Department of Cardiology, University Heart Center Zurich, Zurich, Switzerland
| | - A M Kasel
- Department of Cardiology, University Heart Center Zurich, Zurich, Switzerland
| | - F C Tanner
- Department of Cardiology, University Heart Center Zurich, Zurich, Switzerland
| | - H Alkadhi
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Switzerland
| |
Collapse
|
15
|
Besser M, Dietrich M, Weber L, Rembe JD, Stuermer EK. Efficacy of antiseptics in a novel 3-dimensional human plasma biofilm model (hpBIOM). Sci Rep 2020; 10:4792. [PMID: 32179838 PMCID: PMC7075952 DOI: 10.1038/s41598-020-61728-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 12/04/2019] [Accepted: 02/26/2020] [Indexed: 11/09/2022] Open
Abstract
The increasing incidence of non-healing wounds constitutes a pivotal socio-economic burden. 60-80% of chronic wounds are colonized by pathogenic microorganisms within a protective extracellular polymeric substance, bearing a great challenge in wound management. Human plasma was used to prepare the biofilm model (hpBIOM), adding pathogens to the plasma and forming Coagula-like discs with integrated pathogens were produced. The antiseptics Octenisept and Lavasorb were tested regarding their antibacterial properties on clinically relevant biofilm-growing bacteria (MRSA, P. aeruginosa) in the hpBIOM. Biofilm-typical glycocalyx-formation was confirmed using immunohistochemical staining. Treatment of a 12 h-maturated biofilm with Octenisept resulted in complete eradication of P. aeruginosa and MRSA after 48 h. Lavasorb proved less effective than Octenisept in this setting. In more mature biofilms (24 h), both antiseptics showed a delayed, partially decreased efficacy. Summarized, the hpBIOM provides essential factors for a translational research approach to be used for detailed human biofilm analyses and evaluation of antimicrobial/-biofilm properties of established and novel therapeutic strategies and products. Octenisept and Lavasorb showed an attenuated efficacy in the hpBIOM compared to planktonic conditions and previously published biofilm-studies, prompting the question for the necessity of introducing new international standards and pre-admission requirements on a translational base.
Collapse
Affiliation(s)
- M Besser
- Institute for Translational Wound Research, Centre for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Witten, Germany.
| | - M Dietrich
- Institute for Translational Wound Research, Centre for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Witten, Germany
| | - L Weber
- Institute for Translational Wound Research, Centre for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Witten, Germany
| | - J D Rembe
- Institute for Translational Wound Research, Centre for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Witten, Germany
| | - E K Stuermer
- Department of Vascular Medicine, University Heart Center, Translational Wound Research, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| |
Collapse
|
16
|
Pföhler C, Koch S, Weber L, Müller CSL, Vogt T. Autoimmunhämolytische Anämie als seltene Nebenwirkung einer Therapie mit Pembrolizumab bei metastasiertem Melanom. Aktuelle Dermatologie 2019. [DOI: 10.1055/a-1010-3409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
ZusammenfassungCheckpoint-Inhibitoren wie Pembrolizumab, Nivolumab und Ipilimumab stellen unverzichtbare Wirkstoffe zur Behandlung fortgeschrittener oder metastasierter Melanome dar. Durch eine Aktivierung zytotoxischer T-Zellen durch diese Substanzen kommt es neben einer antitumoralen Immunantwort bei vielen Patienten auch zu einer Vielzahl an immunvermittelten Nebenwirkungen, die jedes Organ des Körpers betreffen können. Neben häufigen autoimmun vermittelten Nebenwirkungen, wie z. B. einer Kolitis, einer Pneumonitis, einer Thyreoiditis und einer Hypophysitis, die in der Regel rasch erkannt werden, können auch seltene Nebenwirkungen auftreten, die initial oft nicht direkt als Nebenwirkung der Therapie interpretiert werden.Bei einer 66 Jahre alten Patientin wurde ein Melanom am linken Unterschenkel exzidiert (Typ NMM, Tumordicke 3 mm; BRAF, NRAS und c-Kit jeweils Wildtyp), Sentinelnodebiopsie inguinal positiv, darauffolgende Lymphknotendissektion ohne Metastasennachweis. Sechs Monate später traten inguinale Lymphknotenfiliae sowie mehrere kutane Metastasen am linken Bein auf. Es erfolgte eine knappe Resektion in toto mit anschließender adjuvanter Radiatio (inguinal und Knie links, GRD 45 Gy). Bereits einige Wochen später zeigten sich am linken Bein erneut mehrere kutane Filiae sowie Lymphknotenfiliae inguinal und iliakal links. Aufgrund des mittlerweile ausgebildeten massiven Lymphödems wurde bei nicht-operabler, lokoregionärer Metastasierung 2016 eine Therapie mit Pembrolizumab begonnen.Nach der 12. Gabe bildete sich eine normochrome, normozytäre Anämie mit transfusionsbedürftigem Hämoglobin (Hb)-Abfall bis auf 8,4 mg/dl aus. Gastro- und koloskopisch konnte keine Blutungsquelle nachgewiesen werden, mittels Knochenmarksbiopsie wurden eine Infiltration des Knochenmarks durch Melanomzellen sowie eine Pure Red Cell Aplasia ausgeschlossen. Bei erhöhter LDH, erniedrigten Werten für Haptoglobin und Retikulozyten sowie positivem direkten Coombs-Test für c3d wurde die Diagnose einer autoimmunhämolytischen Anämie (AIHA) mit Beteiligung aller Vorstufen der roten Reihe gestellt und eine Therapie mit Methylprednisolon begonnen. Bei jedem Versuch die Therapie mit Pembrolizumab nach Stabilisierung des Hb-Wertes fortzuführen, zeigte sich ein erneuter transfusionsbedürftiger Abfall auf Hb-Werte von bis zu 6 mg/dl. Wir entschieden uns die Therapie mit Pembrolizumab nach 15 Zyklen bei kompletter Remission der Metastasen zu beenden; seitdem zeigen sich in Laborkontrollen normwertige Hb-Werte. Da sich nach einigen Monaten erneut ein Progress ausbildete, wurde bei negativem BRAF-Mutationsstatus eine Therapie mit Nivolumab begonnen, hierunter kam es nicht zur erneuten Ausbildung einer AIHA.Die Entwicklung einer Anämie ist eine seltene Nebenwirkung einer Therapie mit Checkpoint-Inhibitoren. Als weitere Ursache wurde neben der hier gezeigten AIHA auch die aplastische Anämie als immunvermittelte Nebenwirkung beschrieben. In den wenigen bisher publizierten Fällen bildete sich die Anämie i. R. der Therapie mit Checkpoint-Inhibitoren frühzeitig aus und zeigte oft ein zögerliches Ansprechen auf Steroide. Bisher sind nur wenige Fälle beschrieben, bei denen eine Re-Exposition ohne erneutes Aufflammen der Anämie möglich war. Trotz immunsuppressiver Therapie sind letale Verläufe beschrieben. Dies verdeutlicht die Notwendigkeit regelmäßiger Laboruntersuchungen unter und nach der Therapie mit Checkpoint-Inhibitoren. In unserem Fall kam es erfreulicherweise nach erneuter Gabe eines Checkpoint-Inhibitors nicht zum erneuten Auftreten der AIHA. Ob dies dem Wechsel von Pembrolizumab zu Nivolumab geschuldet ist, muss derzeit leider unbeantwortet bleiben.
Collapse
Affiliation(s)
- C. Pföhler
- Klinik für Dermatologie, Venerologie und Allergologie am Universitätsklinikum des Saarlandes, Homburg/Saar
| | - S. Koch
- Klinik für Dermatologie, Venerologie und Allergologie am Universitätsklinikum des Saarlandes, Homburg/Saar
| | - L. Weber
- Klinik für Dermatologie, Venerologie und Allergologie am Universitätsklinikum des Saarlandes, Homburg/Saar
| | - C. S. L. Müller
- Klinik für Dermatologie, Venerologie und Allergologie am Universitätsklinikum des Saarlandes, Homburg/Saar
| | - T. Vogt
- Klinik für Dermatologie, Venerologie und Allergologie am Universitätsklinikum des Saarlandes, Homburg/Saar
| |
Collapse
|
17
|
Abstract
BACKGROUND Auditory training is an established intervention in adult cochlear implant (CI) aural rehabilitation. In most cases, training is implemented in an individual therapy setting. Increasing patient numbers and the associated time-economic and cost-related demands as well as psychosocial and communicative aspects support the use of aural group interventions. OBJECTIVES This study aimed 1) to describe concepts and contents of group interventions for adult CI users and 2) to present results of a questionnaire-based evaluation. METHODS Group interventions have been offered at the CI Centre Erlangen CICERO for several years. In Auditory Training Groups, exercises have priority, while Thematic Group Workshops focus on psychosocial aspects and provide information for the participants. The Auditory Training Groups were evaluated based on a patient questionnaire. Additionally, the reliability of the questionnaire was analyzed. RESULTS The median overall satisfaction of CI users participating in Auditory Training Groups was rated as good. Training of speech perception in noise as well as communicative exchange are of great importance for CI users. They rated the therapeutic design as very good to good. Reliability analysis showed significant positive intercorrelations of the questionnaire items. CONCLUSION Group interventions are well accepted by CI users and represent a useful complement to individual therapy during the rehabilitation process. As group interventions place special demands on patients and therapists, structured and well-proven concepts should be used in practice.
Collapse
Affiliation(s)
- C Glaubitz
- Hals-Nasen-Ohren-Klinik, Kopf- und Halschirurgie, Universitätsklinikum Erlangen, Waldstraße 1, 91054, Erlangen, Deutschland.
| | - E K Lehmann
- Hals-Nasen-Ohren-Klinik, Kopf- und Halschirurgie, Universitätsklinikum Erlangen, Waldstraße 1, 91054, Erlangen, Deutschland
| | - L Weber
- Hals-Nasen-Ohren-Klinik, Kopf- und Halschirurgie, Universitätsklinikum Erlangen, Waldstraße 1, 91054, Erlangen, Deutschland
| | - A-M Kulke
- Hals-Nasen-Ohren-Klinik, Kopf- und Halschirurgie, Universitätsklinikum Erlangen, Waldstraße 1, 91054, Erlangen, Deutschland
| | - U Hoppe
- Hals-Nasen-Ohren-Klinik, Kopf- und Halschirurgie, Universitätsklinikum Erlangen, Waldstraße 1, 91054, Erlangen, Deutschland
| |
Collapse
|
18
|
Besser M, Terberger J, Weber L, Ghebremedhin B, Naumova EA, Arnold WH, Stuermer EK. Impact of probiotics on pathogen survival in an innovative human plasma biofilm model (hpBIOM). J Transl Med 2019; 17:243. [PMID: 31345229 PMCID: PMC6659307 DOI: 10.1186/s12967-019-1990-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 07/17/2019] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Despite of medical advances, the number of patients suffering on non-healing chronic wounds is still increasing. This fact is attended by physical and emotional distress and an economic load. The majority of chronic wounds are infected of harmful microbials in a protecting extracellular matrix. These biofilms inhibit wound healing. Biofilm-growing bacteria developed unique survival properties, which still challenge the appropriate wound therapy. The present in-vitro biofilm models are not suitable for translational research. By means of a novel in-vivo like human plasma biofilm model (hpBIOM), this study systematically analysed the influence of 3 probiotics on the survival of five clinically relevant pathogenic microorganisms. METHODS Human plasma was used to produce the innovate biofilm. Pathogenic microorganisms were administered to the plasma. By stimulating the production of a fibrin scaffold, stable coagula-like discs with integrated pathogens were produced. The five clinically relevant pathogens P. aeruginosa, S. aureus, S. epidermidis, E. faecium and C. albicans were challenged to the probiotics L. plantarum, B. lactis and S. cerevisiae. The probiotics were administered on top of the biofilm and the survival was quantified after 4 h and 24 h of incubation. For statistics, two-way ANOVA with post-hoc Tukey's HSD test was applied. P-value > 0.05 was considered to be significant. RESULTS SEM micrographs depicted the pathogens on the surface of the fibrin scaffold, arranged in close proximity and produced the glycocalyx. The application of probiotics induced different growth-reducing capacities towards the pathogens. B. lactis and S. cerevisiae showed slight bacteria-reducing properties. The survival of C. albicans was not affected at all. The most antimicrobial activity was detected after the treatment with L. plantarum. CONCLUSIONS This study successfully reproduced a novel human biofilm model, which provides a human wound milieu and individual immune competence. The success of bacteriotherapy is dependent on the strain combination, the number of probiotics and the activity of the immune cells. The eradicating effect of L. plantarum on P. aeruginosa should be emphasized.
Collapse
Affiliation(s)
- M. Besser
- Institute of Translational Wound Research, Centre for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Stockumer Street 10, 58453 Witten, Germany
| | - J. Terberger
- Institute of Translational Wound Research, Centre for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Stockumer Street 10, 58453 Witten, Germany
| | - L. Weber
- Institute of Translational Wound Research, Centre for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Stockumer Street 10, 58453 Witten, Germany
| | - B. Ghebremedhin
- Institute for Medical Laboratory Diagnostics, Centre for Clinical and Translational Research (CCTR), HELIOS University Hospital Wuppertal, Wuppertal, Germany
| | - E. A. Naumova
- Department of Biological and Material Sciences in Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - W. H. Arnold
- Department of Biological and Material Sciences in Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - E. K. Stuermer
- Institute for Health Care Research in Dermatology and Nursing, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
| |
Collapse
|
19
|
Weber L, Quencer K, Kaufman C. 04:21 PM Abstract No. 257 Percutaneous biliary drain complications in the transplanted liver. J Vasc Interv Radiol 2019. [DOI: 10.1016/j.jvir.2018.12.318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
|
20
|
Curso-Almeida P, Weber L. 379 Effect of yeast fermentation on pea starch glycemic index in dogs. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | - L Weber
- University of Saskatchewan,Saskatoon, SK, Canada
| |
Collapse
|
21
|
Geiger A, Weber L. PSXIII-5 Nitrogen Retention and Protein Quality in Dogs and Cats Fed Commercial Pet Food. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A Geiger
- University of Saskatchewan,Saskatoon, SK, Canada
| | - L Weber
- University of Saskatchewan,Saskatoon, SK, Canada
| |
Collapse
|
22
|
Weber L, Adolphe J, Briens J. 384 Effects of glucose metabolism and carbohydrate sources on cardiometabolic health in dogs and cats. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- L Weber
- University of Saskatchewan,Saskatoon, SK, Canada
| | | | - J Briens
- University of Saskatchewan,Saskatoon, SK, Canada
| |
Collapse
|
23
|
Weber L, Billoux T, Sas N, Dedieu V. 39 Comparison of the iterative tomographic reconstruction algorithms “Bayesian penalized likelihood” (Q.Clear) and OSEM (VPFX) in PET-CT imaging: Application to NSCLC and improvement concerning tumor volume definition. Phys Med 2018. [DOI: 10.1016/j.ejmp.2018.09.121] [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: 11/24/2022] Open
|
24
|
Naumova EA, Weber L, Pankratz V, Czenskowski V, Arnold WH. Bacterial viability in oral biofilm after tooth brushing with amine fluoride or sodium fluoride. Arch Oral Biol 2018; 97:91-96. [PMID: 30368202 DOI: 10.1016/j.archoralbio.2018.10.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 10/11/2018] [Accepted: 10/14/2018] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the effects of sodium fluoride (NaF) and amine fluoride (AmF) on bacterial viability in the oral cavity. MATERIAL AND METHODS Healthy subjects brushed their teeth with either fluoride free toothpaste, NaF- or AmF-containing toothpaste. Biofilm smears from different locations were collected before and immediately and 30 and 120 min after tooth brushing. The smears were stained with live/dead bacterial staining, and the number of the respective bacteria was counted. The data were statistically analyzed by comparing the numbers of bacteria before and after the application of no fluoride, NaF and AmF. RESULTS The highest numbers of bacteria were found in the tongue biofilm, followed by the palatal and cheek biofilm. The lowest numbers were found in the mouth floor biofilm. After the application of AmF, no changes in the numbers of bacteria were found in the biofilms, except for the cheek, where they were reduced. After the application of NaF, the number of bacteria decreased significantly in all biofilms. After 120 min, bacterial regrowth was complete. CONCLUSIONS AmF has only little effect on the bacterial viability of oral biofilms. NaF application reduces the number of living bacteria in the oral biofilms. This effect lasts not longer than 120 min.
Collapse
Affiliation(s)
- E A Naumova
- Dept. of Biological and Material Sciences in Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - L Weber
- Dept. of Biological and Material Sciences in Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - V Pankratz
- Dept. of Biological and Material Sciences in Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - V Czenskowski
- Dept. of Biological and Material Sciences in Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - W H Arnold
- Dept. of Biological and Material Sciences in Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany.
| |
Collapse
|
25
|
Weber L, Rickli H, Haager PK, Joerg L, Weilenmann D, Maisano F, Maeder MT. P5456Pulmonary hypertension in patients with severe aortic valve stenosis undergoing valve replacement: hemodynamic mechanisms and long-term prognostic impact. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5456] [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: 11/13/2022] Open
Affiliation(s)
- L Weber
- Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| | - H Rickli
- Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| | - P K Haager
- Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| | - L Joerg
- Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| | - D Weilenmann
- Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| | - F Maisano
- University Hospital, Zürich, Switzerland
| | - M T Maeder
- Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| |
Collapse
|
26
|
Weber L, Rickli H, Joerg L, Weilenmann D, Haager PK, Brenner R, Maisano F, Maeder MT. P6334Determinants and prognostic role of pulmonary capacitance in patients with severe aortic valve stenosis undergoing valve replacement. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6334] [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: 11/15/2022] Open
Affiliation(s)
- L Weber
- Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| | - H Rickli
- Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| | - L Joerg
- Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| | - D Weilenmann
- Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| | - P K Haager
- Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| | - R Brenner
- Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| | - F Maisano
- University Hospital, Zürich, Switzerland
| | - M T Maeder
- Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| |
Collapse
|
27
|
Weber L, Hänsch A, Wolfram U, Pacureanu A, Cloetens P, Peyrin F, Rit S, Langer M. Registration of phase-contrast images in propagation-based X-ray phase tomography. J Microsc 2017; 269:36-47. [PMID: 28815603 DOI: 10.1111/jmi.12606] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 06/27/2017] [Accepted: 06/30/2017] [Indexed: 11/26/2022]
Abstract
X-ray phase tomography aims at reconstructing the 3D electron density distribution of an object. It offers enhanced sensitivity compared to attenuation-based X-ray absorption tomography. In propagation-based methods, phase contrast is achieved by letting the beam propagate after interaction with the object. The phase shift is then retrieved at each projection angle, and subsequently used in tomographic reconstruction to obtain the refractive index decrement distribution, which is proportional to the electron density. Accurate phase retrieval is achieved by combining images at different propagation distances. For reconstructions of good quality, the phase-contrast images recorded at different distances need to be accurately aligned. In this work, we characterise the artefacts related to misalignment of the phase-contrast images, and investigate the use of different registration algorithms for aligning in-line phase-contrast images. The characterisation of artefacts is done by a simulation study and comparison with experimental data. Loss in resolution due to vibrations is found to be comparable to attenuation-based computed tomography. Further, it is shown that registration of phase-contrast images is nontrivial due to the difference in contrast between the different images, and the often periodical artefacts present in the phase-contrast images if multilayer X-ray optics are used. To address this, we compared two registration algorithms for aligning phase-contrast images acquired by magnified X-ray nanotomography: one based on cross-correlation and one based on mutual information. We found that the mutual information-based registration algorithm was more robust than a correlation-based method.
Collapse
Affiliation(s)
- L Weber
- Univ. Lyon, INSA-Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5220, Inserm U1206, CREATIS, Lyon, France.,ESRF, The European Synchrotron, Grenoble, France.,Currently at Centre Jean Perrin, Service de Physique Médicale, Clermont-Ferrand, France
| | - A Hänsch
- Univ. Lyon, INSA-Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5220, Inserm U1206, CREATIS, Lyon, France
| | - U Wolfram
- School of Engineering and Physical Sciences (EPS), Institute of Mechanical, Process and Energy Engineering (IMPEE), Heriot-Watt University, Edinburgh, UK
| | - A Pacureanu
- ESRF, The European Synchrotron, Grenoble, France
| | - P Cloetens
- ESRF, The European Synchrotron, Grenoble, France
| | - F Peyrin
- Univ. Lyon, INSA-Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5220, Inserm U1206, CREATIS, Lyon, France.,ESRF, The European Synchrotron, Grenoble, France
| | - S Rit
- Univ. Lyon, INSA-Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5220, Inserm U1206, CREATIS, Lyon, France
| | - M Langer
- Univ. Lyon, INSA-Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5220, Inserm U1206, CREATIS, Lyon, France
| |
Collapse
|
28
|
Jovancevic N, Dendorfer A, Matzkies M, Kovarova M, Heckmann JC, Osterloh M, Boehm M, Weber L, Nguemo F, Semmler J, Hescheler J, Milting H, Schleicher E, Gelis L, Hatt H. Medium-chain fatty acids modulate myocardial function via a cardiac odorant receptor. Basic Res Cardiol 2017; 112:13. [PMID: 28116519 PMCID: PMC5258789 DOI: 10.1007/s00395-017-0600-y] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 01/03/2017] [Indexed: 12/17/2022]
Abstract
Several studies have demonstrated the expression of odorant receptors (OR) in various human tissues and their involvement in different physiological and pathophysiological processes. However, the functional role of ORs in the human heart is still unclear. Here, we firstly report the functional characterization of an OR in the human heart. Initial next-generation sequencing analysis revealed the OR expression pattern in the adult and fetal human heart and identified the fatty acid-sensing OR51E1 as the most highly expressed OR in both cardiac development stages. An extensive characterization of the OR51E1 ligand profile by luciferase reporter gene activation assay identified 2-ethylhexanoic acid as a receptor antagonist and various structurally related fatty acids as novel OR51E1 ligands, some of which were detected at receptor-activating concentrations in plasma and epicardial adipose tissue. Functional investigation of the endogenous receptor was carried out by Ca2+ imaging of human stem cell-derived cardiomyocytes. Application of OR51E1 ligands induced negative chronotropic effects that depended on activation of the OR. OR51E1 activation also provoked a negative inotropic action in cardiac trabeculae and slice preparations of human explanted ventricles. These findings indicate that OR51E1 may play a role as metabolic regulator of cardiac function.
Collapse
Affiliation(s)
- Nikolina Jovancevic
- Department of Cell Physiology, Ruhr-University Bochum, 44801, Bochum, Germany.
| | - A Dendorfer
- Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, 80336, Munich, Germany.,DZHK (German Center for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
| | - M Matzkies
- Institute for Neurophysiology, University of Cologne, 50931, Cologne, Germany
| | - M Kovarova
- Division of Pathobiochemistry and Clinical Chemistry, University of Tuebingen, 72076, Tuebingen, Germany
| | - J C Heckmann
- Department of Cell Physiology, Ruhr-University Bochum, 44801, Bochum, Germany
| | - M Osterloh
- Department of Cell Physiology, Ruhr-University Bochum, 44801, Bochum, Germany
| | - M Boehm
- Department of Cell Physiology, Ruhr-University Bochum, 44801, Bochum, Germany
| | - L Weber
- Department of Cell Physiology, Ruhr-University Bochum, 44801, Bochum, Germany
| | - F Nguemo
- Institute for Neurophysiology, University of Cologne, 50931, Cologne, Germany
| | - J Semmler
- Institute for Neurophysiology, University of Cologne, 50931, Cologne, Germany
| | - J Hescheler
- Institute for Neurophysiology, University of Cologne, 50931, Cologne, Germany
| | - H Milting
- Erich and Hanna Klessmann Institute, Clinic for Thoracic and Cardiovascular Surgery, Heart and Diabetes Center NRW, Ruhr-University Bochum, 32545, Bad Oeynhausen, Germany
| | - E Schleicher
- Division of Pathobiochemistry and Clinical Chemistry, University of Tuebingen, 72076, Tuebingen, Germany
| | - L Gelis
- Department of Cell Physiology, Ruhr-University Bochum, 44801, Bochum, Germany
| | - H Hatt
- Department of Cell Physiology, Ruhr-University Bochum, 44801, Bochum, Germany
| |
Collapse
|
29
|
Royer P, Weber L, Jenkins A, Sanders J, Gawron L, Turok D. Family planning knowledge and contraceptive use among resettled African refugee women. Contraception 2016. [DOI: 10.1016/j.contraception.2016.07.149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
30
|
Royer P, Jenkins A, Weber L, Jackson B, Sanders J, Turok D. Group versus individual contraceptive counseling for resettled African refugee women: a pilot randomized controlled trial. Contraception 2016. [DOI: 10.1016/j.contraception.2016.07.133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
31
|
|
32
|
Weber L, Langer M, Tavella S, Ruggiu A, Peyrin F. Quantitative evaluation of regularized phase retrieval algorithms on bone scaffolds seeded with bone cells. Phys Med Biol 2016; 61:N215-31. [DOI: 10.1088/0031-9155/61/9/n215] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
33
|
Santos RM, Weber L, Souza VL, Soares AR, Petry AC. Effects of water-soluble fraction of petroleum on growth and prey consumption of juvenile Hoplias aff. malabaricus (Osteichthyes: Erythrinidae). BRAZ J BIOL 2016; 76:10-7. [PMID: 26871747 DOI: 10.1590/1519-6984.06714] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 10/23/2014] [Indexed: 11/22/2022] Open
Abstract
The influence of the water-soluble fraction of petroleum (WSF) on prey consumption and growth of juvenile trahira Hoplias aff. malabaricus was investigated. Juveniles were submitted to either WSF or Control treatment over 28 days, and jewel tetra Hyphessobrycon eques adults were offered daily as prey for each predator. Total prey consumption ranged from 16 to 86 individuals. Despite the initially lower prey consumption under WSF exposure, there were no significant differences in overall feeding rates between the two treatments. Water-soluble fraction of petroleum had a negative effect on the growth in length of H. aff. malabaricus juveniles. Although unaffected, prey consumption suggested a relative resistance in H. aff. malabaricus to WSF exposition and the lower growth of individuals exposed to WSF than the Control possibly reflects metabolic costs. The implications of the main findings for the individual and the food chain are discussed, including behavioral aspects and the role played by this predator in shallow aquatic systems.
Collapse
Affiliation(s)
- R M Santos
- Pós-graduação em Ciências Ambientais e Conservação, Universidade Federal do Rio de Janeiro, Macaé, RJ, Brazil
| | - L Weber
- Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé, Universidade Federal do Rio de Janeiro, Macaé, RJ, Brazil
| | - V L Souza
- Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé, Universidade Federal do Rio de Janeiro, Macaé, RJ, Brazil
| | - A R Soares
- Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé, Universidade Federal do Rio de Janeiro, Macaé, RJ, Brazil
| | - A C Petry
- Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé, Universidade Federal do Rio de Janeiro, Macaé, RJ, Brazil
| |
Collapse
|
34
|
Weber L. I. Ist durch die Auslöschungsschiefe von vier Kristallplatten der Winkel der optischen Achsen eindeutig bestimmt? Z KRIST-CRYST MATER 2015. [DOI: 10.1524/zkri.1921.56.1.1] [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] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
35
|
|
36
|
Gibbs NM, Weber L, Brown S, Morgan N. Anaesthesia and intensive care in 2015: maintaining our mission. Anaesth Intensive Care 2015; 43:153-4. [PMID: 25735678 DOI: 10.1177/0310057x1504300202] [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: 11/15/2022]
Affiliation(s)
- N M Gibbs
- Department of Anaesthesia, Sir Charles Gairdner Hospital, Perth, Western Australia
| | - L Weber
- Australian Society of Anaesthetists, North Sydney, New South Wales and Australian and New Zealand College of Anaesthetists, Melbourne, Victoria
| | - S Brown
- Australian Society of Anaesthetists, North Sydney, New South Wales
| | - N Morgan
- Australian Society of Anaesthetists, North Sydney, New South Wales
| |
Collapse
|
37
|
Weber L, Pfeiffer S, Mazzitelli D, Rankin J, Stamm C, Pirk J, Choi YH, Detter C, Beyersdorf F, Shrestha M, Schreiber C, Lange R, Fischlein T. Prevalence of Leaflet Defects during Aortic Valve Repair with Normal and Aneurysmal Aortic Morphology. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
38
|
Mirhosseini N, Knaus S, Vatanparast H, Weber L. MECHANISMS OF ARTERIAL STIFFNESS AND HYPERTENSION DIFFER WITH VITAMIN D STATUS IN A NORMAL RAT MODEL. Can J Cardiol 2014. [DOI: 10.1016/j.cjca.2014.07.482] [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] Open
|
39
|
Mekahli D, Van Straelen K, Jager K, Schaefer F, Groothoff J, Assadi MH, Landau D, Chen Y, Rabkin R, Medrano J, Segev Y, Donadio ME, Loiacono E, Peruzzi L, Amore A, Camilla R, Chiale F, Vergano L, Boido A, Conrieri M, Bianciotto M, Bosetti FM, Lastauka I, Coppo R, Laszki-SzczaChor K, Dorota PJ, Zwolinska D, Filipowski H, Rusiecki L, Sobieszczanska M, Dagan R, Davidovits M, Cleper R, Krause I, Chesnaye NC, Jager KJ, Schaefer F, Groothoff JW, Heaf JG, Topaloglu R, Merenmies J, Lewis M, Shtiza D, Maurer E, Zaicova N, Kushnirenko S, Zampetoglou A, Van Stralen KJ, Milo evski-Lomi G, Lezaic V, Radivojevic D, Kostic M, Paripovic D, Peco-Antic A, Benedyk A, Sobiak J, Resztak M, Ostalska-Nowicka D, Zachwieja J, Jarosz K, Chrzanowska M, Soltysiak J, Skowronska B, Stankiewicz W, Fichna P, Lewandowska-Stachowiak M, Silska-Dittmar M, Ostalska-Nowicka D, Zachwieja J, Lemoine S, De Souza V, Ranchin B, Cartier R, Pottel H, Dolomanova O, Hadj-Aissa A, Cochat P, Dubourg L, Hoelttae T, Van Stralen KJ, Groothoff JW, Schaefer F, Bjerre A, Jager KJ, Jobs K, Jung A, Lichosik M, Placzynska M, Tjaden LA, Noordzij M, Van Stralen KJ, Schaefer F, Groothoff JW, Jager KJ, Lazzeri E, Ronconi E, Angelotti ML, Peired AJ, Mazzinghi B, Becherucci F, Sansavini G, Sisti A, Provenzano A, Giglio S, Lasagni L, Romagnani P, Pozziani G, Sinatora F, Benetti E, Ghirardo G, Longo G, Cattelan C, Murer L, Malina M, Dusatkova P, Dusek J, Slamova Z, Cinek O, Pruhova S, Bergmann C, Seeman T, Schaefer F, Arbeiter K, Hoppe B, Jungraithmayr T, Klaus G, Pape L, Dinavahi R, Farouk M, Manamley N, Vondrak K, Vidal E, Ranieri M, Ghirardo G, Scavia G, Benetti E, Longo G, Parolin M, Murer L, Aksu N, Yavascan O, Alparslan C, Elmas CH, Saritas S, Anil AB, Kamit Can F, Anil M, Bal A, Kasap Demir B, Mutlubas Ozsan F, Van Huis M, Bonthuis M, Van Stralen KJ, Schaefer F, Jager KJ, Groothoff JW, Makieieva NI, Gramatiuk SM, Tsymbal VM, Buzhynskaya NR, Oborn H, Forinder U, Herthelius M, Westland R, Schreuder MF, Van Der Lof DF, Vermeulen A, Dekker IMJ, Bokenkamp A, Van Wijk JAE, Gramatiuk S, Makieieva NI, Tsymbal VM, Ghirardo G, Seveso M, Della Vella M, Cozzi E, Murer L, Garzotto F, Vidal E, Zanella M, Murer L, Ronco C, Prikhodina L, Chumak O, Dobrynina M, Nusken E, Von Gersdorff G, Schaller M, Rascher K, Barth C, Bach D, Weber L, Dotsch J, Roszkowska-Blaim M, Skrzypczyk P, Jander A, Tkaczyk M, Balasz-Chmielewska I, Zurowska A, Drozdz D, Pietrzyk JA, Aksenova M, Zhetlina V, Mitrofanova A, Choi Y, Cho BS, Suh JS, Abd El-Fattah MA, El-Ghoneimy DH, Elhakim IZ, El-Owaidy RH, Afifi HM, Abo-Elnaga GM, Zvenigorodska A, Tasic V, Gucev Z, Polenakovic M, Silska-Dittmar M, Zaorska K, So tysiak J, Ostalska-Nowicka D, Zachwieja J, Nowicki M, Jobs K, Jung A, Emirova K, Tolstova E, Zaytseva O, Muzurov A, Makulova A, Zverev D, Kamit Can F, Mutlbas Ozsan F, Alparslan C, Elmas CH, Saritas S, Manyas H, Kasap Demir B, Yavascan O, Aksu N, Hoste L, Braat E, De Waele L, Goemans N, Vermeersch P, Gheysens O, Levtchenko E, Pottel H, Golovachova VA, Odinets YV, Zharkova TS, Trynduk YS, Odinets YV, Kharchenko TV, Musial K, Zwolinska D, Roomizadeh P, Gheissari A, Abedini A, Mehdikhani B, Gheissari A, Rezaii Z, Merrikhi A, Madihi Y, Kelishadi R, Dryl IS, Senatorova GS, Kolybaeva TF, Muratov GR, Yavascan O, Aksu N, Alparslan C, Eliacik K, Kanik A, Saritas S, Elmas CH, Mutlubas Ozsan F, Kasap Demir B, Anil M, Bal A, Postorino V, Guzzo G, Ghiotto S, Mazzone L, Loi V, Maxia S, Roggero S, Attini R, Piga A, Postorino M, Pani A, Cabiddu G, Piccoli GB, Peco-Antic A, Kostic M, Spasojevic-Dimitrijeva B, Milosevski-Lomic G, Cvetkovic M, Kruscic D, Paripovic D. PAEDIATRIC NEPHROLOGY. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
40
|
Horng A, Brun E, Mittone A, Gasilov S, Weber L, Geith T, Adam-Neumair S, Bravin A, Reiser M, Coan P. Phasenkontrast-CT als neue Röntgentechnik zur Darstellung von Knorpel und Weichgewebe des Kniegelenkes im Vergleich zu konventionellen klinischen Techniken. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
41
|
Delorme R, Arnoud Y, Boyer B, Fonteille I, Gallin-Martel L, Gallin-Martel M, Giraud J, Guillaudin O, Pelissier A, Rosetto O, Weber L. 54: Development of a Transparent Photon Detector for the Online Monitoring of IMRT Beams. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)34075-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
42
|
Dötsch J, Weber L. Update - Vortrag Nephrologie und Dialyse. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0033-1354483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
43
|
Mirhosseini NZ, Bohaychuk K, Knaus S, Vatanparast H, Weber L. Finding a Safe Dose for Vitamin D Supplementation: Both Deficiency and Toxicity Increase Blood Pressure. Can J Cardiol 2013. [DOI: 10.1016/j.cjca.2013.07.277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
|
44
|
Weber L, Arnoud Y, Delorme R, Guillaudin O, Boyer B, Gallin-Martel L, Pelissier A, Rosetto O, Gallin-Martel ML, Lei C, Reboulet G, Sihanath R, Docquieres N, Giraud JY. Development of a transparent photon detector for the online monitoring of IMRT beams. Phys Med 2013. [DOI: 10.1016/j.ejmp.2013.08.132] [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: 11/29/2022] Open
|
45
|
Smith B, Beach C, Mahmoud D, Weber L, Henk H. P-190 Real-world outcomes among AML patients treated with decitabine or azacitidine. Leuk Res 2013. [DOI: 10.1016/s0145-2126(13)70238-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
46
|
Nordin C, Nordin B, Kumata Y, Weber L, Tanizaki N. PO-0883: Light ions particle therapy with cost-effective new tools. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)33189-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
47
|
Weber L, Nonaka N, Nordin B. PO-0887: Pencil beam scanning using a new dedicated nozzle for proton beam delivery. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)33193-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
48
|
Adamczak M, Koleganova N, Nyengaard JR, Ritz E, Wiecek A, Slabiak Blaz N, Yi Chun DX, Alexandre H, Sandrine GS, Olivier T, Isabelle E, Christophe L, Guy T, Pierre Francois W, Jean-Philippe R, Yvon L, Eric R, Muller-Krebs S, Muller-Krebs S, Weber L, Tsobaneli J, Reiser J, Zeier M, Schwenger V, Tinel C, Samson M, Bonnotte B, Mousson C, Machcinska M, Machcinska M, Bocian K, Wyzgal M, Korczak-Kowalska G, Ju MK, Huh KH, Park KT, Kim SJ, Cho BH, Kim CD, So BJ, Leee S, Kang CM, Joo DJ, Kim YS, Bocian K, Zarzycki M, Sobich A, Korczak-Kowalska G, Matsuyama M, Hase T, Yoshimura R, Koshino K, Sakai K, Suzuki T, Nobori S, Ushigome H, Brikci-Nigassa L, Chargui J, Touraine JL, Yoshimura N, Cantaluppi V, Medica D, Figliolini F, Migliori M, Mannari C, Dellepiane S, Quercia AD, Randone O, Tamagnone M, Messina M, Manzione AM, Ranghino A, Biancone L, Segoloni GP, Camussi G, Turk TR, Zou X, Rauen U, De Groot H, Amann K, Kribben A, Eckardt KU, Bernhardt WM, Witzke O, Lidia G, Wouter C, Yvon L, Eric A, Yann LM, Guy T, Christian N, Marie E, Pierre M, Zineb A, Miriana D, Annick M, Marc A, Daniel A, Wornle M, Ribeiro A, Motamedi N, Grone HJ, Cohen CD, Schlondorff D, Schmid H, Teplan V, Banas M, Banas B, Steege A, Bergler T, Kruger B, Schnulle P, Yard B, Kramer BK, Hoger S, Xavier MP, Sampaio-Norton S, Gaiao S, Alves H, Oliveira G, Xavier MP, Sampaio-Norton S, Gaiao S, Alves H, Oliveira G, Xavier MP, Sampaio-Norton S, Gaiao S, Alves H, Oliveira G, Zaza G, Rascio F, Pontrelli P, Granata S, Rugiu C, Grandaliano G, Lupo A, Wohlfahrtova M, Wohlfahrtova M, Brabcova I, Balaz P, Janousek L, Lodererova A, Honsova E, Wohlfahrt P, Viklicky O, Grabner A, Grabner A, Kentrup D, Edemir B, Sirin Y, Pavenstadt H, Schober O, Schlatter E, Schafers M, Schnockel U, Reuter S, Rascio F, Pontrelli P, Accetturo M, Gigante M, Gigante M, Tataranni T, Zito A, Schena A, Schena FP, Stallone G, Gesualdo L, Grandaliano G, Maillard N, Masson I, Lena A, Manolie M, Eric A, Christophe M, Lassen CK, Keller AK, Moldrup U, Bibby BM, Jespersen B, Cvetkovic T, Velickovic Radovanovic R, Pavlovic R, Djordjevic V, Vlahovic P, Stefanovic N, Sladojevic N, Ignjatovic A, Rong S, Menne J, Haller H, Suszdak P, Tomczuk P, Gueler F, Nelli S, Sara D, Salma EK, Naoufal M, Tarik M, Mohamed Z, Guislaine M, Mohamed Gharbi B, Benyounes R, Lu X, Rong S, Shushakova N, Menne J, Kirsch T, Haller H, Gueler F, Bockmeyer CL, Bockmeyer CL, Ramackers W, Wittig J, Agustian PA, Klose J, Dammrich ME, Kreipe H, Brocker V, Winkler M, Becker JU, Agustian PA, Bockmeyer CL, Wittig J, Becker JU, Bockmeyer CL. Transplantation - basic. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs247] [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: 11/15/2022] Open
|
49
|
Morgen K, Sammer G, Weber L, Aslan B, Müller C, Bachmann GF, Sandmann D, Oechsner M, Vaitl D, Kaps M, Reuter I. Structural brain abnormalities in patients with Parkinson disease: a comparative voxel-based analysis using T1-weighted MR imaging and magnetization transfer imaging. AJNR Am J Neuroradiol 2011; 32:2080-6. [PMID: 22081675 DOI: 10.3174/ajnr.a2837] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND AND PURPOSE In PD, tissue damage occurs in specific cortical and subcortical regions. Conventional MR images have only limited capacity to depict these structural changes. The purpose of the current study was to investigate whether voxel-based MT imaging could indicate structural abnormalities beyond atrophy measurable with T1-weighted MR imaging. MATERIALS AND METHODS Thirty-six patients with PD without dementia (9 in H&Y stage 1, thirteen in H&Y 2, eleven in H&Y 3, three in H&Y 4) and 23 age-matched control subjects were studied with T1-weighted MR imaging and MT imaging. Voxel-based analyses of T1-weighted MR imaging was performed to investigate brain atrophy, while MT imaging was used to study abnormalities within existing tissue. Modulated GM and WM probability maps, sensitive to volume, and nonmodulated maps, indicative of tissue density, were obtained from T1-weighted MR imaging. Effects seen on MTR images, but absent on density maps, were attributed to damage of existing tissue. RESULTS Contrary to T1-weighted MR imaging, MT imaging was sensitive to the progression of brain pathology of the neocortex and paraventricular WM. MTR images and T1-based volume images, but not density images, showed a progression of disease in the olfactory cortex, indicating the occurrence of atrophy as well as damage to existing tissue in this region. MTR images revealed bilateral damage to the SN, while T1-weighted MR imaging only showed left-sided abnormalities. CONCLUSIONS The findings suggest that voxel-based MT imaging permits a whole-brain unbiased investigation of CNS structural integrity in PD and may be a valuable tool for identifying structural damage occurring without or before measurable atrophy.
Collapse
Affiliation(s)
- K Morgen
- Central Institute of Mental Health, Mannheim, Germany.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Dittrich K, Plank C, Amann K, Dötsch J, Fehrenbach H, Kemper M, Konrad M, Pohl M, Weber L. Beeinflusst die Art der Behandlung das Outcome der IgA-Nephropathie bei Kindern? Klin Padiatr 2010. [DOI: 10.1055/s-0030-1251047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|