1
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Hoerst A, Hermann M, Mewes KR, Steinmeyer L, Buchholzer M. Apparent limitations of OECD TG 431 for classification of acrylic- and methacrylic-based adhesives. Toxicol In Vitro 2024; 94:105700. [PMID: 37751785 DOI: 10.1016/j.tiv.2023.105700] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 09/03/2023] [Accepted: 09/22/2023] [Indexed: 09/28/2023]
Abstract
For years, the strive for in vitro methods for toxicological assessment suitable to replace animal studies gained progressive importance. OECD Test Guideline (TG) 431 was implemented in 2004, allowing to circumvent animal testing according to OECD TG 404 while reliably predicting skin corrosion potential of many substances and products. However, non-animal assays often show protocol-dependent limitations, that complicate or even prevent the testing of several groups of substances. In this study, the suitability of the OECD TG 431 for assessment of the skin corrosion potential of known acidic, thus often skin corrosive or irritating acrylic and methacrylic acid-based adhesives and monomers, was investigated. The commercially available Phenion® Open Source Reconstructed Epidermis (OS-REp) model, developed at Henkel & Co. KGaA, was used. The EpiDerm™ prediction model was considered most applicable to the Phenion® OS-REp model. All Proficiency Substances listed in OECD TG 431, amongst them six acids, were correctly classified and subcategorized as Skin Corr. 1 A or 1B/C corrosives. The OS-REp model was shown to be suitable for the assessment of skin corrosion potential in accordance with OECD TG 431. However, our results also indicate that acrylic and methacrylic monomer-based adhesives might fall outside the applicability domain of this guideline.
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Affiliation(s)
- A Hoerst
- Henkel AG & Co. KGaA, Henkelstraße 67, 40589 Duesseldorf, Germany.
| | - M Hermann
- Henkel AG & Co. KGaA, Henkelstraße 67, 40589 Duesseldorf, Germany
| | - K R Mewes
- Henkel AG & Co. KGaA, Henkelstraße 67, 40589 Duesseldorf, Germany
| | - L Steinmeyer
- Henkel AG & Co. KGaA, Henkelstraße 67, 40589 Duesseldorf, Germany
| | - M Buchholzer
- Henkel AG & Co. KGaA, Henkelstraße 67, 40589 Duesseldorf, Germany.
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2
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Hafner C, Manschein V, Klaus DA, Schaubmayr W, Tiboldi A, Scharner V, Gleiss A, Thal B, Krammel M, Hamp T, Willschke H, Hermann M. Live stream of prehospital point-of-care ultrasound during cardiopulmonary resuscitation - A feasibility trial. Resuscitation 2024; 194:110089. [PMID: 38110144 DOI: 10.1016/j.resuscitation.2023.110089] [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: 10/05/2023] [Revised: 12/05/2023] [Accepted: 12/07/2023] [Indexed: 12/20/2023]
Abstract
BACKGROUND Current resuscitation guidelines recommend that skilled persons could use ultrasound to detect reversible causes during cardiopulmonary resuscitation (CPR) where the examination can be safely integrated into the Advanced Life Support (ALS) algorithm. However, in a prehospital setting performing and rapidly interpreting ultrasound can be challenging for physicians. Implementing remote, expert-guided, and real-time transmissions of ultrasound examinations offers the opportunity for tele-support, even during an out-of-hospital cardiac arrest (OHCA). The aim of this feasibility study was to evaluate the impact of tele-supported ultrasound in ALS on hands-off time during an OHCA. METHODS In an urban setting, physicians performed point-of-care ultrasound (POCUS) on patients during OHCA using a portable device, either with tele-support (n = 30) or without tele-support (n = 12). Where tele-support was used, the ultrasound image was transmitted via a remote real-time connection to an on-call specialist in anaesthesia and intensive care medicine with an advanced level of critical care ultrasound expertise. The primary safety endpoint of this study was to evaluate whether POCUS can be safely integrated into the algorithm, and to provide an analysis of hands-off time before, during, and after POCUS during OHCA. RESULTS In all 42 cases it was possible to perform POCUS during regular rhythm analyses, and no additional hands-off time was required. In 40 of these 42 cases, the physicians were able to perform POCUS during a single regular rhythm analysis, with two periods required only in two cases. The median hands-off time during these rhythm analyses for POCUS with tele-support was 10 (8-13) seconds, and 11 (9-14) seconds for POCUS without tele-support. Furthermore, as a result of POCUS, in a quarter of all cases the physician on scene altered their diagnosis of the primary suspected cause of cardiac arrest, leading to a change in treatment strategy. CONCLUSIONS This feasibility study demonstrated that POCUS with tele-support can be safely performed during OHCA in an urban environment. Trial Registration (before patient enrolment): ClinicalTrials.gov, NCT04817475.
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Affiliation(s)
- C Hafner
- Department of Anaesthesia, Intensive Care Medicine and Pain Medicine, Division of General Anaesthesia and Intensive Care Medicine, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria; Ludwig Boltzmann Institute Digital Health and Patient Safety, Waehringer Straße 104/10, 1180 Vienna, Austria
| | - V Manschein
- Department of Anaesthesia, Intensive Care Medicine and Pain Medicine, Division of General Anaesthesia and Intensive Care Medicine, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - D A Klaus
- Department of Anaesthesia, Intensive Care Medicine and Pain Medicine, Division of General Anaesthesia and Intensive Care Medicine, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - W Schaubmayr
- Department of Anaesthesia, Intensive Care Medicine and Pain Medicine, Division of General Anaesthesia and Intensive Care Medicine, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - A Tiboldi
- Department of Anaesthesia, Intensive Care Medicine and Pain Medicine, Division of General Anaesthesia and Intensive Care Medicine, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - V Scharner
- Department of Anaesthesia, Intensive Care Medicine and Pain Medicine, Division of General Anaesthesia and Intensive Care Medicine, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - A Gleiss
- Centre for Medical Data Science, Medical University of Vienna, Spitalgasse 23, 1090 Vienna, Austria
| | - B Thal
- Emergency Medical Service Vienna, Radetzkystrasse 1, 1030 Vienna, Austria
| | - M Krammel
- Emergency Medical Service Vienna, Radetzkystrasse 1, 1030 Vienna, Austria; PULS - Austrian Cardiac Arrest Awareness Association, Lichtenthaler Gasse 4/1/R03, 1090 Vienna, Austria
| | - T Hamp
- Department of Anaesthesia, Intensive Care Medicine and Pain Medicine, Division of General Anaesthesia and Intensive Care Medicine, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria; Emergency Medical Service Vienna, Radetzkystrasse 1, 1030 Vienna, Austria
| | - H Willschke
- Department of Anaesthesia, Intensive Care Medicine and Pain Medicine, Division of General Anaesthesia and Intensive Care Medicine, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria; Ludwig Boltzmann Institute Digital Health and Patient Safety, Waehringer Straße 104/10, 1180 Vienna, Austria
| | - M Hermann
- Department of Anaesthesia, Intensive Care Medicine and Pain Medicine, Division of General Anaesthesia and Intensive Care Medicine, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria; Ludwig Boltzmann Institute Digital Health and Patient Safety, Waehringer Straße 104/10, 1180 Vienna, Austria.
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3
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Dalla Pozza R, Hermann M, Haas NA. Balloon-Atrioseptostomy in Small Children Using an Embolectomy Catheter: Preliminary Data. Case Rep Cardiol 2023; 2023:9920336. [PMID: 37538838 PMCID: PMC10396523 DOI: 10.1155/2023/9920336] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 02/10/2023] [Accepted: 07/19/2023] [Indexed: 08/05/2023] Open
Abstract
Interventional treatment of restrictive atrial septal defects in complex heart disease is considered state-of-the-art therapy up to date. Nevertheless, dedicated balloons are lacking so far, as several products have been withdrawn from the market. We report on off-label use of a balloon embolectomy catheter used successfully in a preterm patient and discuss whether this device might be used in other patients as well as it seems to be promising due to its shape and versatility.
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Affiliation(s)
- R. Dalla Pozza
- Division of Pediatric Cardiology, Ludwig Maximilian-University of Munich, Munich, Germany
| | - M. Hermann
- Division of Pediatric Cardiology, Ludwig Maximilian-University of Munich, Munich, Germany
| | - N. A. Haas
- Division of Pediatric Cardiology, Ludwig Maximilian-University of Munich, Munich, Germany
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4
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Riess S, Radwan M, Baghdadi K, Winter A, Kaiser P, Hermann M, Walther T, Emrich F. Outcome after ECMO with Axillary Cannulation: The Frankfurt Experience. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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5
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Minzaghi D, Hermann M, Oberacher H, Anvidalfarei S, Ehrle S, Dubrac S. 214 Topical DEHP exposure leads to inflammation and epidermal barrier damage in epidermal equivalents. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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6
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Tessitore E, Schmid JP, Hermann M, Capoferri M, Kiencke S, Schmied C, Tschanz H, Wilhelm M, Meyer P. Cardiovascular rehabilitation delivery and outcomes in Switzerland: data from a national database over the last decade. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Cardiac rehabilitation (CR) is a multidisciplinary, comprehensive, exercise-based intervention strongly recommended by current guidelines to improve symptoms and quality of life and to reduce cardiovascular adverse outcomes, mainly in patients with coronary artery disease and heart failure. CR activities have not been reported on a Swiss national base so far.
Purpose
To report CR outcome variables from a Swiss national base.
Methods
As part of the Swiss working group for cardiovascular prevention, rehabilitation, and sports cardiology (SCPRS) quality standards, all Swiss CR centres provide yearly a quality indicator report on an online questionnaire. Annual data from 2010 to 2019 were transferred as medians or means of all individual patients' data from each centre. We used the t-Student test to compare changes of outcome variables between entry and exit of the programme.
Results
A total of 133,060 CR patients were included (68,690 inpatients and 64,370 outpatients) with a progressive increase reaching its climax with 14'909 patients/year in 2018. Mean age ± standard deviation (SD) in outpatient and inpatient programmes was 60±1 and 68±1 years, and women percentage 21% and 32%, respectively. The most common CR indication was acute coronary syndrome (51%) in outpatient, whereas cardiovascular surgery of various types (60%) was the main indication in inpatient programmes. Mean improvement ± SD of functional capacity was 38% ±3.6 using the six-minute walk test in inpatient (p<0.001) and 21% ±2 using cycle-ergometer maximal exercise testing in outpatient programmes (p<0.001). Quality of life mainly assessed with the 12-item Short Form Survey (SF-12) in outpatient CR improved by 13% ±4.5. MacNew Heart questionnaire systematically performed in inpatient programmes showed significant improvement at emotional level by 12% ±0.4, at physical level by 30% ±0.9, and at social level by 18% ±0.6.
Conclusion
Even if still underutilised in certain groups of patients such as women or heart failure, CR has gained growing importance in Switzerland during the last decade. Functional capacity, as well as quality of life, was significantly improved. Individual CR patient data should be collected in the future to improve assessment of outcome parameters and benchmarking of centres.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- E Tessitore
- University Hospital of Geneva, Department of Cardiology , Geneva , Switzerland
| | - J P Schmid
- Clinic Gais, Department of Cardiology , Gais , Switzerland
| | - M Hermann
- University of Zurich, Department of Cardiology , Zurich , Switzerland
| | - M Capoferri
- Cardiocentro Ticino, Department of Cardiology , Lugano , Switzerland
| | - S Kiencke
- Kardiologische Gemeinschaftspraxis , Bern , Switzerland
| | - C Schmied
- University of Zurich, Department of Cardiology , Zurich , Switzerland
| | - H Tschanz
- Berner Reha Zentrum , Heiligenschwendi , Switzerland
| | - M Wilhelm
- University of Bern, Department of Cardiology , Bern , Switzerland
| | - P Meyer
- University Hospital of Geneva, Department of Cardiology , Geneva , Switzerland
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7
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Jellestad L, Meier VG, Bierbauer W, Bermudez T, Auschra B, Gunther MP, Scholz U, Von Kanel R, Hermann M, Euler S. Differential associations of emotional and physical domains of the MacNew Heart with changes in 6-minute walking test. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Aims
Cardiac rehabilitation (CR), a key component of secondary prevention in cardiac patients, contributes fundamentally to improved cardiovascular health outcomes. Health-related quality of life (HRQOL) represents a widely employed outcome measure in CR, yet, its predictive properties on exercise capacity change during CR are poorly understood. Aim of this study was to examine the association between baseline HRQOL and its subdomains on improvement of exercise capacity during CR.
Methods
Study participants were 13,717 inpatients of six Swiss CR clinics from 2012 to 2018. We measured HRQOL at admission to CR with the MacNew Heart (MNH) questionnaire and exercise capacity at admission and discharge using the six-minutes walking test (6MWT). Following factorial analyses, we performed univariate and multivariate analyses to test the predictive properties of baseline global HRQOL and its domains for improvement in exercise capacity, adjusting for demographic and clinical characteristics.
Results
Mean improvement in 6MWT was 114 meters (SD=90), achieved after 17.4 days (SD=5.5). Lower emotional HRQOL (b=7.85, p≤0.001, 95% CI [−5.67, 10.03]) and higher physical HRQOL (b=−5.23, p<0.001, 95% CI [−6.56, −3.90]) were associated with less improvement in the 6MWT. Global MNH and social HRQOL showed no association with exercise capacity improvement.
Conclusion
Patients entering CR with low emotional and high physical HRQOL are at risk for a lower gain in exercise capacity during CR. Global MNH alone does not provide a reliable assessment of HRQOL; thus a focus on specific domains of HRQOL is needed.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- L Jellestad
- University Hospital Zurich , Zurich , Switzerland
| | - V G Meier
- University Hospital Zurich , Zurich , Switzerland
| | | | - T Bermudez
- University of Zurich , Zurich , Switzerland
| | - B Auschra
- University Hospital Zurich , Zurich , Switzerland
| | - M P Gunther
- University Hospital Zurich , Zurich , Switzerland
| | - U Scholz
- University of Zurich , Zurich , Switzerland
| | - R Von Kanel
- University Hospital Zurich , Zurich , Switzerland
| | - M Hermann
- University Hospital Zurich , Zurich , Switzerland
| | - S Euler
- University Hospital Zurich , Zurich , Switzerland
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8
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Jellestad L, Auschra B, Von Kanel R, Euler S, Hermann M. Sex- and age-related differences of HRQOL change in cardiac rehabilitation. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Health-related quality of life (HRQOL) has emerged as a valid and disease-specific outcome measure in cardiac patients. Cardiac rehabilitation (CR), a core component of secondary prevention, not only improves cardiovascular outcomes, but also HRQOL. Unfortunately, CR is still underutilized, especially among women and older patients. Aim of this study was to highlight age- and sex-specific effects of CR on HRQOL.
Method
A sample of 8286 patients (mean age 69.2±11.47 years; men 67.8±11.29, women 72.2±11.25) was analyzed. Patients were prospectively asessed from 2012 to 2018 in six Swiss CR clinics. HRQOL was measured at CR entry and discharge using the MacNew Heart Disease questionnaire. In multivariate analyses, we estimated sex- and age-specific changes in HRQOL during CR, adjusting for clinical characteristics.
Results
Women scored lower in any subdomain of HRQOL on admission to CR (social M = 5.05 (SD = 1.3); emotional M = 5.06±1.17; physical M = 4.36±1.72), compared to men (social M = 5.2±1.23); emotional M = 5.35±1.1; physical M = 4.43±1.76). Women showed greater improvement of social (F=10.98, p<0.001), emotional (F=17.73, p<0.001) and physical HRQOL (F=9.47, p=0.002). In a subgroup of elderly patients (>76 years) female sex predicted higher changes in emotional (F=10.878, p<0.001), but not in social (F=1.424, p=0.232) and physical HRQOL (F=2.272, p=0.132).
Conclusion
Women report poorer HRQOL in all subdomains at CR entry compared to men, but in turn particularly benefit from CR in this regard. In older patients, this is particularly true for emotional HRQOL. Our results indicate that sex- and age-specific needs of cardiac patients should be considered during CR.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- L Jellestad
- University Hospital Zurich , Zurich , Switzerland
| | - B Auschra
- University Hospital Zurich , Zurich , Switzerland
| | - R Von Kanel
- University Hospital Zurich , Zurich , Switzerland
| | - S Euler
- University Hospital Zurich , Zurich , Switzerland
| | - M Hermann
- University Hospital Zurich , Zurich , Switzerland
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9
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Hermann M, Pabst-Von OJ, Michel S, Dalla-Pozza R, Jakob A, Hörer J, Haas N. First in Man: Successful Implantation of a Custom-Made Fontan Cannula in a Patient with Failing Fontan Circulation as a Bridge to Transplant. Thorac Cardiovasc Surg 2022. [DOI: 10.1055/s-0042-1742964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
| | | | | | | | - A. Jakob
- Lindwurmstr. 4, München, Deutschland
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10
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Radwan M, Marinos S, Kaiser P, Hlavicka J, Hermann M, Walther T, Emrich F. Axillary ECMO after Cardiac Surgery: Weaning and Early Outcome in 179 Consecutive Patients. Thorac Cardiovasc Surg 2022. [DOI: 10.1055/s-0042-1742819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- M. Radwan
- University Hospital Frankfurt, Frankfurt am Main, Deutschland
| | - S. Marinos
- University Hospital Frankfurt, Frankfurt am Main, Deutschland
| | - P. Kaiser
- University Hospital Frankfurt, Frankfurt am Main, Deutschland
| | - J. Hlavicka
- Uniklinikum Frankfurt, Frankfurt am Main, Deutschland
| | - M. Hermann
- University Hospital Frankfurt, Frankfurt am Main, Deutschland
| | - T. Walther
- University Hospital Frankfurt, Frankfurt am Main, Deutschland
| | - F. Emrich
- University Hospital Frankfurt, Frankfurt am Main, Deutschland
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11
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Puspitasari YM, Diaz-Canestro C, Liberale L, Guzik TJ, Flammer AJ, Bonetti NR, Constantino S, Paneni F, Akhmedov A, Beer JH, Ruschitzka F, Hermann M, Luscher TF, Sudano I, Camici GG. MMP-2 gene silencing attenuates age-dependent carotid stiffness via reduction of elastin degradation and increased eNOS activation. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.3378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background and aims
Arterial stiffness is a hallmark of vascular aging. Being characterized by a loss of elasticity of large arterial walls, arterial stiffness is associated with an increased risk of cardiovascular disease (CVD). The age-dependent arterial stiffness is primarily attributed to alterations in the elastic and collagen deposition that is regulated by a number of enzymes, including matrix metalloproteinase-2 (MMP-2). Nevertheless, the mechanistic link between age-dependent arterial stiffness and MMP-2 remains unclear.
In this study, we investigated the effect and efficacy of therapeutic MMP-2 knockdown using small interfering RNA (siRNA) on age-dependent arterial stiffness.
Methods
Pulse wave velocity (PWV) was assessed in the right carotid artery of wild-type (WT) mice of different age groups. MMP-2 levels and activity in the carotid artery and plasma of young (3 months) and aged (20–25 months) WT mice were determined. Old WT mice (18–21 months) were treated for 4 weeks with either MMP-2 or scrambled siRNA, in which carotid PWV was assessed at baseline, 2 and 4 weeks after the start of the treatment. Elastin to collagen ratio, desmosin (DES) level, and endothelial nitric oxide synthase (eNOS) pathways were also evaluated and compared. Lastly, levels of circulating MMP-2 and DES, the breakdown product of elastin, were measured in a human cohort (23–86 years old), in whom carotid-femoral PWV was assessed.
Results
Carotid PWV, as well as both vascular and circulating MMP-2 levels, were elevated with increasing age in WT mice (Figure 1). Therapeutic MMP-2 knockdown in aged WT mice reduced the vascular MMP-2 expression and attenuated age-dependent carotid stiffness. Increased elastin to collagen ratio and a lower plasma DES level were observed on MMP-2 silenced treated animals (Figure 2). Moreover, siMMP-2 treated mice showed enhanced eNOS phosphorylation on Ser1177. A direct interaction between MMP-2 and eNOS was also observed, which, interestingly, is augmented with age. Finally, collected human data showed a higher level of circulating MMP-2 levels on the elderly subjects. In addition, plasma DES level is positively correlated with age and aortic PWV, indicating the involvement of vascular elastin catabolism on arterial stiffness.
Conclusions
Therapeutic MMP-2 gene silencing, specifically targeting vascular MMP-2, attenuates age-dependent carotid stiffness. This effect is mediated by augmenting eNOS activation and reducing elastin degradation. Thus, our findings indicate MMP-2 as a potential therapeutic target to mitigate age-dependent arterial stiffness and CVD.
Funding Acknowledgement
Type of funding sources: Foundation. Main funding source(s): Swiss National Science Foundation,Foundation for Cardiovascular Research–Zurich Heart House Figure 1
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Affiliation(s)
- Y M Puspitasari
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - C Diaz-Canestro
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - L Liberale
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - T J Guzik
- Cardiovascular Research Centre of Glasgow, Institute of Cardiovascular and Medical Science, Glasgow, United Kingdom
| | - A J Flammer
- University Hospital Zurich, Department of Cardiology, Zurich, Switzerland
| | - N R Bonetti
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - S Constantino
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Paneni
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - A Akhmedov
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - J H Beer
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Ruschitzka
- University Hospital Zurich, Department of Cardiology, Zurich, Switzerland
| | - M Hermann
- University Hospital Zurich, Department of Cardiology, Zurich, Switzerland
| | - T F Luscher
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - I Sudano
- University Hospital Zurich, Department of Cardiology, Zurich, Switzerland
| | - G G Camici
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
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12
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Minzaghi D, Anvidalfarei S, Ehrle S, Hermann M, Dubrac S. 119 Xenobiotic metabolism is triggered in atopic dermatitis. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.08.122] [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]
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13
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Puspitasari Y, Diaz-Canestro C, Liberale L, Guzik T, Flammer A, Bonetti N, Wüst P, Constantino S, Paneni F, Akhmedov A, Beer J, Ruschitzka F, Hermann M, Lüscher T, Sudano I, Camici G. Therapeutic MMP-2 knockdown blunts age-dependent carotid stiffness by decreasing elastin degradation and augmenting enos activation. Atherosclerosis 2021. [DOI: 10.1016/j.atherosclerosis.2021.06.086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Grajewski M, Hermann M, Oleschuk R, Verpoorte E, Salentijn G. Leveraging 3D printing to enhance mass spectrometry: A review. Anal Chim Acta 2021; 1166:338332. [DOI: 10.1016/j.aca.2021.338332] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/12/2021] [Accepted: 02/15/2021] [Indexed: 12/11/2022]
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15
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Amann K, Boor P, Wiech T, Singh J, Vonbrunn E, Knöll A, Hermann M, Büttner-Herold M, Daniel C, Hartmann A. COVID-19 effects on the kidney. Pathologe 2021; 42:76-80. [PMID: 33646362 PMCID: PMC7919237 DOI: 10.1007/s00292-020-00900-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Accepted: 12/16/2020] [Indexed: 12/13/2022]
Abstract
Apart from pulmonary disease, acute kidney injury (AKI) is one of the most frequent and most severe organ complications in severe coronavirus disease 2019 (COVID-19). The SARS-CoV‑2 virus has been detected in renal tissue. Patients with chronic kidney disease (CKD) before and on dialysis and specifically renal transplant patients represent a particularly vulnerable population. The increasing number of COVID-19 infected patients with renal involvement led to an evolving interest in the analysis of its pathophysiology, morphology and modes of virus detection in the kidney. Meanwhile, there are ample data from several autopsy and kidney biopsy studies that differ in the quantity of cases as well as in their quality. While the detection of SARS-CoV‑2 RNA in the kidney leads to reproducible results, the use of electron microscopy for visualisation of the virus is difficult and currently critically discussed due to various artefacts. The exact contribution of indirect or direct effects on the kidney in COVID-19 are not yet known and are currently the focus of intensive research.
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Affiliation(s)
- K Amann
- Department of Nephropathology, University Clinic Erlangen, Krankenhausstr. 8-10, 91054, Erlangen, Germany.
| | - P Boor
- Institute of Pathology and Department of Nephrology, Section Translational Nephropathology, University Clinic of the RWTH Aachen, Aachen, Germany
| | - T Wiech
- Institute of Pathology, Section Nephropathology, University Clinic Hamburg-Eppendorf, Hamburg, Germany
| | - J Singh
- Medical Clinic 3, University Clinic Erlangen, Erlangen, Germany
| | - E Vonbrunn
- Department of Nephropathology, University Clinic Erlangen, Krankenhausstr. 8-10, 91054, Erlangen, Germany
| | - A Knöll
- Institute of Virology, University Clinic Erlangen, Erlangen, Germany
| | - M Hermann
- Medical Clinic 3, University Clinic Erlangen, Erlangen, Germany
| | - M Büttner-Herold
- Department of Nephropathology, University Clinic Erlangen, Krankenhausstr. 8-10, 91054, Erlangen, Germany
| | - C Daniel
- Department of Nephropathology, University Clinic Erlangen, Krankenhausstr. 8-10, 91054, Erlangen, Germany
| | - A Hartmann
- Institute of Pathology, University Clinic Erlangen, Erlangen, Germany
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16
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Rimmele M, Wirth J, Britting S, Gehr T, Hermann M, van den Heuvel D, Kestler A, Koch T, Schoeffski O, Volkert D, Wingenfeld K, Wurm S, Freiberger E, Sieber C. Improvement of transitional care from hospital to home for older patients, the TIGER study: protocol of a randomised controlled trial. BMJ Open 2021; 11:e037999. [PMID: 33558344 PMCID: PMC7871673 DOI: 10.1136/bmjopen-2020-037999] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
INTRODUCTION In Germany, an efficient and feasible transition from hospital to home for older patients, ensuring continuous care across healthcare settings, has not yet been applied and evaluated. Based on the transitional care model (TCM), this study aims to reduce preventable readmissions of patients ≥75 years of age with a transitional care intervention performed by geriatric-experienced care professionals. The study investigates whether the intervention ensures continuous care during transition and stabilises the care situation of patients at home. METHODS AND ANALYSES Randomised controlled clinical trial, recruiting between 25 April 2018 and 31 December 2019 in one German hospital in the city of Regensburg. The intervention group is supported by care professionals in the transition process from hospital to home for up to 12 months. Based on TCM, the intervention includes an individual care plan according to a patient's symptoms, risks, needs and values. The plan is advanced in the domestic situation via personal visits and telephone contacts. All necessary care actions regarding, for example, mobility, residence adjustments, or nutrition, are initiated to be executed by ambulant care services, and are monitored, evaluated and adapted if necessary. In supervising the care plan, the care professionals do not administer active care services themselves but coordinate them. Patients and their caregivers are actively engaged in the care planning and execution. In contrast, the control group receives only usual discharge planning in the hospital and usual ambulatory care.The primary outcome is the all-cause readmission rate assessed using health insurance data within a follow-up of up to 12 months after hospital discharge. Secondary outcomes include care quality, mobility, nutritional and wound situation, and health-related quality of life. They are assessed at baseline, after 1 month, 3 months, 6 months, and at the end of study visit. Additionally, the economic efficiency of the intervention will be evaluated. ETHICS AND DISSEMINATION Ethics approval for the trial was obtained from the Ethics Committee of the Friedrich-Alexander-Universität Erlangen-Nürnberg. Results will be published in peer-reviewed, open-access scientific journals and disseminated at national and international research conferences and through public presentations in the geriatric and healthcare community. TRIAL REGISTRATION ClinicalTrials.gov identifier: NCT03513159.
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Affiliation(s)
- Martina Rimmele
- Institute for Biomedicine of Aging, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nuremberg, Germany
| | - Jenny Wirth
- Institute for Biomedicine of Aging, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nuremberg, Germany
| | - Sabine Britting
- Institute for Biomedicine of Aging, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nuremberg, Germany
| | - Thomas Gehr
- Institute for Biomedicine of Aging, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nuremberg, Germany
- St John of God Hospital, Regensburg, Germany
| | | | | | | | | | - Oliver Schoeffski
- Chair of Health Management, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nuremberg, Germany
| | - Dorothee Volkert
- Institute for Biomedicine of Aging, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nuremberg, Germany
| | - Klaus Wingenfeld
- Institute for Nursing Science at the University of Bielefeld, Bielefeld, Germany
| | - Susanne Wurm
- Department of Social Medicine and Prevention, Faculty of Medicine, Institute for Community Medicine, University of Greifswald, Greifswald, Germany
| | - Ellen Freiberger
- Institute for Biomedicine of Aging, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nuremberg, Germany
| | - Cornel Sieber
- Institute for Biomedicine of Aging, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nuremberg, Germany
- Kantonsspital Winterthur, Winterthur, Switzerland
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17
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Amann K, Boor P, Wiech T, Singh J, Vonbrunn E, Knöll A, Hermann M, Büttner-Herold M, Daniel C, Hartmann A. [COVID-19 effects on the kidney]. Pathologe 2021; 42:183-187. [PMID: 33527157 PMCID: PMC7849614 DOI: 10.1007/s00292-020-00899-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Accepted: 12/16/2020] [Indexed: 02/06/2023]
Abstract
Bei einer schweren Coronavirus-Erkrankung-2019 (COVID-19) ist neben der Lungenerkrankung selbst das akute Nierenversagen (ANV) eine der häufigsten und schwerwiegendsten Komplikationen. Das SARS-CoV-2-Virus konnte hierbei auch in der Niere nachgewiesen werden. Patienten mit chronischen Nierenerkrankungen (CKD), dialysepflichtige sowie v. a. nierentransplantierte Patienten scheinen eine besonders vulnerable Population darzustellen. Die zunehmende Anzahl SARS-CoV-2-infizierter Patienten hat das Interesse an der genauen Pathophysiologie und Morphologie der Nierenschädigung sowie am direkten Virusnachweis in der Niere geweckt, der im Gegensatz zur Lunge insgesamt schwieriger zu führen ist. Hierzu liegen mittlerweile Daten aus Autopsie- und Nierenbiopsiestudien mit unterschiedlichen Patientenzahlen und von sehr unterschiedlicher Qualität vor. Während der Nachweis von SARS-CoV-2-RNA im Nierengewebe mit gut reproduzierbaren Ergebnissen erfolgt, ist insbesondere der Virusnachweis mittels Elektronenmikroskopie schwierig und wird aufgrund zahlreicher Artefakte derzeit kritisch diskutiert. Die genauen direkten oder indirekten Effekte von SARS-CoV‑2 auf die Niere sind noch nicht im Detail bekannt und derzeit der Fokus intensiver Forschung.
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Affiliation(s)
- K Amann
- Abt. Nephropathologie, Universitätsklinikum Erlangen, Krankenhausstr. 8-10, 91054, Erlangen, Deutschland.
| | - P Boor
- Institut für Pathologie & Medizinische Klinik II (Nephrologie), Sektion Translationale Nephropathologie, Universitätsklinikum der RWTH Aachen, Aachen, Deutschland
| | - T Wiech
- Institut für Pathologie, Sektion Nephropathologie, Universitätsklinikum Hamburg-Eppendorf, Martinistr. 52, 20146, Hamburg, Deutschland
| | - J Singh
- Medizinische Klinik 3, Universitätsklinikum Erlangen, Erlangen, Deutschland
| | - E Vonbrunn
- Abt. Nephropathologie, Universitätsklinikum Erlangen, Krankenhausstr. 8-10, 91054, Erlangen, Deutschland
| | - A Knöll
- Virologie, Universitätsklinikum Erlangen, Erlangen, Deutschland
| | - M Hermann
- Medizinische Klinik 3, Universitätsklinikum Erlangen, Erlangen, Deutschland
| | - M Büttner-Herold
- Abt. Nephropathologie, Universitätsklinikum Erlangen, Krankenhausstr. 8-10, 91054, Erlangen, Deutschland
| | - C Daniel
- Abt. Nephropathologie, Universitätsklinikum Erlangen, Krankenhausstr. 8-10, 91054, Erlangen, Deutschland
| | - A Hartmann
- Pathologisches Institut, Universitätsklinikum Erlangen, Erlangen, Deutschland
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18
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Puspitasari Y, Diaz-Canestro C, Sudano I, Flammer A, Bonetti N, Wuest P, Liberale L, Constantino S, Paneni F, Ruschitzka F, Beer J, Hermann M, Luscher T, Camici G. The role of matrix metalloproteinase-2 on age-dependent arterial stiffness. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Arterial stiffness is a well-characterized sign of vascular aging. It strongly predicts the development of several cardiovascular diseases (CVD), such as hypertension, stroke and heart failure. The age-dependent stiffening of elastic arteries is primarily attributed to the loss of interlaminar elastic fibers and the increase of collagen fibers. This process is regulated by matrix metalloproteinases (MMPs), including MMP-2. A strong correlation between MMP-2 levels and arterial stiffness has been previously described. However, the causative link between age-dependent arterial stiffness and MMP-2 remains unclear.
Purpose
In this study, we aimed to prospectively investigate the effect of MMP-2 gene silencing on the development of age-dependent carotid stiffness in wild type (WT) mice.
Methods
Pulse Wave Velocity (PWV), as the gold standard technique to assess arterial stiffness, was assessed in the right common carotid artery (RCCA) of C57BL/6 WT mice of various ages ranging between 3 and 25 months. Plasma and vascular levels of MMP-2 on RCCA were also measured and correlate with PWV. Moreover, aged WT male mice (18–21-month-old) were treated for 4 weeks with either MMP-2 siRNA or Scr siRNA via tail vein injection every 4 days and PWV was assessed at baseline, 2 and 4 weeks.
Results
Mouse carotid PWV increased and was positively correlated with age in our in vivo longitudinal study. Increases of vascular and circulating MMP-2 levels were also observed in this study. MMP-2 knockdown by siRNA treatment reduced vascular MMP-2 level (Fig. 1), which in turn attenuated age-dependent carotid stiffening (data not shown). siMMP-2 treated animals also showed an increase of elastin to collagen ratio. Furthermore, enhanced phosphorylation of the activatory eNOS Ser1177 was observed in the siMMP-2 group without affecting the level of total eNOS and Akt phosphorylation. Interestingly, co-immunoprecipitation experiments demonstrated that MMP-2 directly interacts with eNOS and this interaction is augmented with age.
Conclusion
The silencing of MMP-2 attenuates age-dependent carotid stiffness by affecting elastin to collagen ratio and interfering with eNOS activation. Thus, MMP-2 may mediate ECM remodeling and endothelial-dependent vasorelaxation in the development of age-dependent vascular stiffness.
Funding Acknowledgement
Type of funding source: Foundation. Main funding source(s): Swiss National Science Foundation, Foundation for Cardiovascular Research-Zurich Heart House
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Affiliation(s)
- Y.M Puspitasari
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - C Diaz-Canestro
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - I Sudano
- University Hospital Zurich, Department of Cardiology, Zurich, Switzerland
| | - A Flammer
- University Hospital Zurich, Department of Cardiology, Zurich, Switzerland
| | - N.R Bonetti
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - P Wuest
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - L Liberale
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - S Constantino
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Paneni
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Ruschitzka
- University Hospital Zurich, Department of Cardiology, Zurich, Switzerland
| | - J.H Beer
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - M Hermann
- University Hospital Zurich, Department of Cardiology, Zurich, Switzerland
| | - T.F Luscher
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - G.G Camici
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
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19
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Filippopulos FM, Huppert D, Brandt T, Hermann M, Franz M, Fleischer S, Grill E. Computerized clinical decision system and mobile application with expert support to optimize management of vertigo in primary care: study protocol for a pragmatic cluster-randomized controlled trial. J Neurol 2020; 267:45-50. [PMID: 32719973 PMCID: PMC7718197 DOI: 10.1007/s00415-020-10078-0] [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: 05/02/2020] [Accepted: 07/10/2020] [Indexed: 02/07/2023]
Abstract
Vertigo and dizziness are amongst the most common symptoms in medicine and often have a major impact on activities of daily life. Although many causes of vertigo and dizziness can easily be recognized, patients often receive inappropriate and ineffective treatment. The reasons for this are various. Because vertigo/dizziness is an interdisciplinary symptom and there is a lack of standardised diagnostic tools, it is easy to lose the overview of the possible differential diagnoses. There is evidence though, that the management of patients with vertigo/dizziness can be optimized using standardized care pathways with digital support. The present study (within the framework of “PoiSe—prevention, online feedback, and interdisciplinary therapy of acute vestibular syndromes by e-health”) aims to evaluate the implementation of a program with several interlocking components. The three main components are a computerized clinical decision system, a mobile application, a counselling and interdisciplinary educational program developed by the German Center for Vertigo and Balance Disorders (DSGZ). The study is a cluster-randomized controlled trial with a parallel-group design, as well as a detailed process evaluation. Clusters comprise of primary care physician practices in Bavaria, Germany. In the scope of the study the effectiveness, acceptability and efficiency of the intervention will be evaluated. It is anticipated that the intervention will improve the quality and efficiency of the management of dizzy patients. A higher diagnostic accuracy, optimized treatment, and disease progression monitoring is expected to improve patient-relevant outcomes and reduce health-care costs.
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Affiliation(s)
- Filipp M Filippopulos
- German Center for Vertigo and Balance Disorders, LMU Klinikum, Ludwig Maximilians Universität, Marchioninistraße 15, 81377, Munich, Germany.
- Department of Neurology, LMU Klinikum, Ludwig Maximilians Universität, Marchioninistraße 15, 81377, Munich, Germany.
| | - Doreen Huppert
- German Center for Vertigo and Balance Disorders, LMU Klinikum, Ludwig Maximilians Universität, Marchioninistraße 15, 81377, Munich, Germany
| | - Thomas Brandt
- German Center for Vertigo and Balance Disorders, LMU Klinikum, Ludwig Maximilians Universität, Marchioninistraße 15, 81377, Munich, Germany
| | - Margit Hermann
- AOK Bayern, Die Gesundheitskasse, Carl-Wery-Straße 28, 81739, Munich, Germany
| | - Mareike Franz
- Kassenärztliche Vereinigung Bayerns, Referat Versorgungsinnovationen, Elsenheimerstraße 39, 80687, Munich, Germany
| | - Steffen Fleischer
- Institute for Health and Nursing Sciences, Medical Faculty, Martin Luther University Halle-Wittenberg, Magdeburger Straße 8, 06112, Halle (Saale), Germany
| | - Eva Grill
- Institute of Medical Informatics, Biometry and Epidemiology, Ludwig Maximilians Universität, Marchioninistraße 15, 81377, Munich, Germany
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Walser M, Dietl M, Hermann M, Langhammer F, Mandilaras G, Lehner A, Ulrich S, Dalla-Pozza R, Haas N, Jakob A. Increased Aortic Pulse Wave Velocity Has Impact on Clinical Course of the Fontan Circulation. Thorac Cardiovasc Surg 2020. [DOI: 10.1055/s-0040-1705565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Bienenstein E, Hermann M, Jakob A, Thomas C, Ulrich S, Fischer M, Haas N. Generation #Foodporn #Foodpornsaveslives. Thorac Cardiovasc Surg 2020. [DOI: 10.1055/s-0040-1705516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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22
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Thomas C, Johler S, Heineking B, Hermann M, Thorsteinsdottir J, Schichor C, Haas N. Tako Tsubo Cardiomyopathy in a 13-Year-Old Boy. Thorac Cardiovasc Surg 2020. [DOI: 10.1055/s-0040-1705523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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23
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Leman G, Pavel P, Hermann M, Gnaiger E, Elias P, Dubrac S. 384 Mitochondria: novel therapeutic targets in atopic dermatitis? J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.386] [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: 12/01/2022]
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Rejmer P, Palla A, Schulz EG, Neumann CL, Hund M, Hermann M. Ambulatory blood pressure monitoring on admission in survivors of recent stroke entering inpatient rehabilitation. J Hum Hypertens 2019; 34:364-371. [PMID: 31467389 DOI: 10.1038/s41371-019-0237-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 06/18/2019] [Accepted: 07/17/2019] [Indexed: 11/09/2022]
Abstract
Arterial hypertension (AHT) is a major risk factor for stroke, yet blood pressure (BP) goals thereafter remain uncertain. Although additional prognostic value of 24-hour ambulant BP monitoring (ABPM) is acknowledged, its clinical impacts remain limited. We suspected that routine ABPM could identify characteristic circadian BP patterns in different brain lesion types, the knowledge of which might, in turn, be helpful in improving overall BP management in patients after stroke. In our study, we compared cardiovascular parameters derived from ABPM and traditional blood pressure measurements (TBPM) among 105 stroke survivors who entered our inpatient neuro-rehabilitation program. The mean age of mostly male (64.8%) patients was 71 ± 12 years. Ischemic strokes were predominant (75.2%). Despite normotensive systolic BP means in TBPM (133.5 ± 18.2 mmHg) and ABPM (24 h: 122.8 ± 14.7 mmHg), AHT persisted in up to 67.6% of all patients, with ABPM uncovering nocturnal systolic non- or reversed dipping in 89.5% and 53.3%, respectively. The latter was predominant (85.7%) in the hemorrhagic subgroup which also displayed lower daytime SBP than the ischemic one (ABPM: 117.1 ± 11.8 vs 124.7 ± 14.7 mmHg, p = 0.033). Further differences were present among distinct brain lesion types. Sufficient dippers were younger (58 ± 12 vs 75 ± 11 years, p < 0.001), but adjusting for age yielded no independent correlations. In spite of normotensive daytime BP measurements, ABPM detects latent AHT and insufficient nocturnal BP dipping after the acute phase of stroke. Further studies are needed to elucidate the role of increased nocturnal BP in patients after stroke.
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Affiliation(s)
- P Rejmer
- Zürcher RehaZentrum Wald, Wald, Switzerland.,Department of Pulmonology, University Hospital Zürich, Zürich, Switzerland
| | - A Palla
- Zürcher RehaZentrum Wald, Wald, Switzerland.,Swissconcussion Center, Schulthess Klinik, Zürich, 8008, Switzerland
| | - E G Schulz
- Nephrologisches Zentrum Göttingen GbR, Göttingen, Germany
| | - C L Neumann
- Nephrologisches Zentrum Göttingen GbR, Göttingen, Germany
| | - M Hund
- Rehab Basel, Basel, Switzerland
| | - M Hermann
- Zürcher RehaZentrum Wald, Wald, Switzerland. .,Department of Cardiology, University Hospital Zürich, Zürich, Switzerland.
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Kochinke L, Kaeopookum P, Orasch T, Hermann M, Haas H, Decristoforo C, Pfister J, Summer D. 68Ga-labelled, fluorescent siderophores: dual imaging potential in Aspergillus fumigatus infections. Nucl Med Biol 2019. [DOI: 10.1016/s0969-8051(19)30360-9] [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]
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26
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Summer D, Mayr S, Petrik M, Hermann M, Vieider L, Matuszczak B, Decristoforo C. A proof of concept study with FSC-based hybrid imaging agents for pretargeting applications. Nucl Med Biol 2019. [DOI: 10.1016/s0969-8051(19)30282-3] [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: 10/26/2022]
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27
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Musholt TJ, Bockisch A, Clerici T, Dotzenrath C, Dralle H, Goretzki PE, Hermann M, Holzer K, Karges W, Krude H, Kussmann J, Lorenz K, Luster M, Niederle B, Nies C, Riss P, Schabram J, Schabram P, Schmid KW, Simon D, Spitzweg C, Steinmüller T, Trupka A, Vorländer C, Weber T, Bartsch DK. [Update of the S2k guidelines : Surgical treatment of benign thyroid diseases]. Chirurg 2019; 89:699-709. [PMID: 29876616 DOI: 10.1007/s00104-018-0653-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Thyroid resections represent one of the most common operations with 76,140 interventions in the year 2016 in Germany (source Destatis). These are predominantly benign thyroid gland diseases. Recommendations for the operative treatment of benign thyroid diseases were last published by the CAEK in 2010 as S2k guidelines (Arbeitsgemeinschaft der Wissenschaftlichen Medizinischen Fachgesellschaften e.V. [AWMF] 003/002) against the background of increasingly more radical resection procedures. Hemithyroidectomy and thyroidectomy are routinely performed for benign thyroid disease in practice. The operation-specific risks show a clear increase with the extent of the resection. Therefore, weighing-up of the risk-indications ratio between unilateral lobectomy or thyroidectomy necessitates an independent evaluation of the indications for both sides. This principle in particular has been used to update the guidelines. In addition, the previously published recommendations of the CAEK for correct execution and consequences of intraoperative neuromonitoring were included into the guidelines, which in particular serve the aim to avoid bilateral recurrent laryngeal nerve paralysis. Moreover, the recommendations for the treatment of postoperative complications, such as hypoparathyroidism and postoperative infections were revised. The updated guidelines therefore represent the current state of the science as well as the resulting surgical practice.
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Affiliation(s)
- T J Musholt
- Sektion Endokrine Chirurgie der Klinik für Allgemein‑, Viszeral- und Transplantationschirurgie, Universitätsmedizin der Johannes Gutenberg Universität Mainz, Langenbeckstr. 1, 55101, Mainz, Deutschland.
| | - A Bockisch
- Klinik für Nuklearmedizin, Universitätsklinikum Essen, Hufelandstr. 55, 45147, Essen, Deutschland
| | - T Clerici
- Klinik für Chirurgie, Kantonsspital St. Gallen, 9007, St. Gallen, Schweiz
| | - C Dotzenrath
- Klinik für endokrine Chirurgie, Helios Universitätsklinikum Wuppertal, Heusnerstr. 40, 42283, Wuppertal, Deutschland
| | - H Dralle
- Sektion Endokrine Chirurgie, Klinik für Allgemein‑, Viszeral- und Transplantationschirurgie, Universitätsklinikum Essen, Hufelandstr. 55, 45147, Essen, Deutschland
| | - P E Goretzki
- Chirurgische Klinik, Campus Charite Mitte/Campus Virchow Klinikum, Endokrine Chirurgie, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Deutschland
| | - M Hermann
- 2. Chirurgische Abteilung, Krankenanstalt Rudolfstiftung, Märzstr. 80, 1150, Wien, Österreich
| | - K Holzer
- Sektion Endokrine Chirurgie der Viszeral‑, Thorax- u. Gefäßchirurgie, Universitätsklinikum Marburg, Baldingerstr., 35043, Marburg, Deutschland
| | - W Karges
- Sektion Endokrinologie und Diabetologie - Medizinische Klinik III, Universitätsklinikum Aachen, RWTH Aachen, Pauwelsstr. 30, 52074, Aachen, Deutschland
| | - H Krude
- Klinik für Pädiatrie mit Schwerpunkt Endokrinologie und Diabetologie, Charité Berlin, Augustenburger Platz 1, 13353, Berlin, Deutschland
| | - J Kussmann
- Klinik für Endokrine Chirurgie, Schön Klinik Hamburg-Eilbeck, Dehnhaide 120, 22081, Hamburg, Deutschland
| | - K Lorenz
- Klinik u. Poliklinik f. Allgem.-, Viszeral- u. Gefäßchirurgie, Universitätsklinikum Halle, Ernst-Grube-Str. 40, 06120, Halle, Deutschland
| | - M Luster
- Nuklearmedizin, Universitätsklinikum Gießen und Marburg, GmbH, Standort Marburg, Baldingerstrass, 35041, Marburg, Deutschland
| | - B Niederle
- Sektion Endokrine Chirurgie, Franziskus Spital, Nikolsdorfergasse 32, 1050, Wien, Österreich
| | - C Nies
- Klinik für Allg.- u. Viszeralchirurgie, Marienhospital Osnabrück, Bischofsstr. 1, 49074, Osnabrück, Deutschland
| | - P Riss
- Chirurgische Universitätsklinik, Währinger Gürtel 18-20, 1090, Wien, Österreich
| | - J Schabram
- Klinik für Endokrine Chirurgie, Asklepios Klinik Lich, Goethestr. 4, 35423, Lich, Deutschland
| | - P Schabram
- Anwaltskanzlei Ratajczak & Partner, Heinrich-von-Stephan-Str. 25, 79100, Freiburg im Breisgau, Deutschland
| | - K W Schmid
- Pathologie, Universitätsklinikum Essen, Hufelandstr. 55, 45147, Essen, Deutschland
| | - D Simon
- Klinik f. Allg.- u. Viszeralchirurgie, Ev. Bethesda Krankenhaus Duisburg GmbH, Heerstr. 219, 47053, Duisburg, Deutschland
| | - Ch Spitzweg
- Medizinische Klinik und Poliklinik II, LMU Klinikum der Universität München - Campus Großhadern, Marchioninistr. 15, 81377, München, Deutschland
| | - Th Steinmüller
- Chirurgische Abteilung, Zentrum f. Allg.- u. Viszeralchirurgie, DRK-Kliniken Westend, Spandauer Damm 130, 14050, Berlin, Deutschland
| | - A Trupka
- Chirurgische Klinik, Klinikum Starnberg GmbH, Oßwaldstr. 1, 82319, Starnberg, Deutschland
| | - C Vorländer
- Endokrine Chirurgie, Bürgerhospital Frankfurt am Main, Nibelungenallee 37-41, 60318, Frankfurt am Main, Deutschland
| | - T Weber
- Klinik für Endokrine Chirurgie, Katholisches Klinikum Mainz, An der Goldgrube 11, 55131, Mainz, Deutschland
| | - D K Bartsch
- Klinik für Visceral‑, Thorax- und Gefäßchirurgie, Universitätsklinikum Gießen und Marburg, GmbH, Standort Marburg, Baldingerstrass, 35041, Marburg, Deutschland
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Hermann M, Takors R. Wachstum, Produktbildung und Verlauf intrazellulärer Metaboliten von C. ljungdahlii
mit verschiedenen Substraten. CHEM-ING-TECH 2018. [DOI: 10.1002/cite.201855268] [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: 11/08/2022]
Affiliation(s)
- M. Hermann
- Universität Stuttgart; Institut für Bioverfahrenstechnik; Allmandring 31 70569 Stuttgart Deutschland
| | - R. Takors
- Universität Stuttgart; Institut für Bioverfahrenstechnik; Allmandring 31 70569 Stuttgart Deutschland
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Schenk B, Lindner AK, Treichl B, Bachler M, Hermann M, Larsen OH, Fenger-Eriksen C, Wally D, Tauber H, Velik-Salchner C, Fries D. Fibrinogen supplementation ex vivo increasesclot firmness comparable to platelet transfusion in thrombocytopenia. Br J Anaesth 2018; 117:576-582. [PMID: 27799172 DOI: 10.1093/bja/aew315] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/12/2016] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Fibrinogen concentrate can improve clot firmness and offers a better safety profile than platelet concentrates. Reduction or avoidance of blood transfusions represents a strategy to reduce associated risks. We investigated whether supplementation of fibrinogen concentrate ex vivo can compensate for clot strength as compared with platelet transfusion in vivo METHODS: One hundred patients in need of platelet transfusion (PT) were enrolled. Blood samples were collected immediately before PT and at 1 h and 24 h after PT. Fibrinogen concentrate was added to these citrated whole blood samples at concentrations of 50, 100, 200 and 400 mg kg-1 and the maximum clot firmness (MCF) was analysed using ROTEM thromboelastometry. RESULTS Fibrinogen supplementation increased MCF significantly and dose-dependently before and after PT. The effect of fibrinogen concentrate (equivalent to doses of 100 and 200 mg kg-1) ex vivo was comparable to that of PT in vivo, whereas 400 mg kg-1 fibrinogen significantly improved MCF compared with PT (P < 0.001). CONCLUSIONS Fibrinogen concentrate can match the effect of PT on MCF in thrombocytopenia. This potential alternative haemostatic intervention should be evaluated in clinical trials.
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Affiliation(s)
- B Schenk
- Department of General and Surgical Intensive Care Medicine, Medical University of Innsbruck, Anichstrasse 35, Innsbruck 6020, Austria
| | - A K Lindner
- Department of Anaesthesiology and General Intensive Care Medicine, Medical University of Innsbruck, Anichstrasse 35, Innsbruck 6020, Austria
| | - B Treichl
- Department of Anaesthesiology and General Intensive Care Medicine, Medical University of Innsbruck, Anichstrasse 35, Innsbruck 6020, Austria
| | - M Bachler
- Department of General and Surgical Intensive Care Medicine, Medical University of Innsbruck, Anichstrasse 35, Innsbruck 6020, Austria
| | - M Hermann
- Department of General and Surgical Intensive Care Medicine, Medical University of Innsbruck, Anichstrasse 35, Innsbruck 6020, Austria
| | - O H Larsen
- Center for Haemophilia and Thrombosis, Department of Clinical Biochemistry, Aarhus University Hospital, Skejby - Brendstrupgårdsvej 100, 8200 Aarhus, Denmark
| | - C Fenger-Eriksen
- Center for Haemophilia and Thrombosis, Department of Clinical Biochemistry, Aarhus University Hospital, Skejby - Brendstrupgårdsvej 100, 8200 Aarhus, Denmark.,Department of Anaesthesiology, Aarhus University Hospital, Skejby - Brendstrupgårdsvej 100, 8200 Aarhus, Denmark
| | - D Wally
- Department of Anaesthesiology and General Intensive Care Medicine, Medical University of Innsbruck, Anichstrasse 35, Innsbruck 6020, Austria
| | - H Tauber
- Department of Anaesthesiology and General Intensive Care Medicine, Medical University of Innsbruck, Anichstrasse 35, Innsbruck 6020, Austria
| | - C Velik-Salchner
- Department of Anaesthesiology and General Intensive Care Medicine, Medical University of Innsbruck, Anichstrasse 35, Innsbruck 6020, Austria
| | - D Fries
- Department of General and Surgical Intensive Care Medicine, Medical University of Innsbruck, Anichstrasse 35, Innsbruck 6020, Austria
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Hermann M, Witassek F, Erne P, Rickli H, Radovanovic D. 56Impact of cardiac rehabilitation referral at hospital discharge on 1 year outcome of patients with acute myocardial infarction. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.56] [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)
- M Hermann
- Zürcher RehaZentrum Wald, Cardiology, Wald, Switzerland
| | - F Witassek
- University of Zurich, AMIS Plus Data Center, Epidemiology, Biostatistics and Prevention Institute, Zurich, Switzerland
| | - P Erne
- AMIS Plus, Zurich, Switzerland
| | - H Rickli
- Cantonal Hospital St. Gallen, Department of Cardiology, St. Gallen, Switzerland
| | - D Radovanovic
- University of Zurich, AMIS Plus Data Center, Epidemiology, Biostatistics and Prevention Institute, Zurich, Switzerland
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Pavel P, Leman G, Hermann M, Rühl R, Schmuth M, Dubrac S. 652 Peroxisomes contribute to inflammation in atopic dermatitis. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.661] [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: 11/16/2022]
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Knöfler R, Eberl W, Schulze H, Bakchoul T, Bergmann F, Gehrisch S, Geisen C, Gottstein S, Halimeh S, Harbrecht U, Kappert G, Kirchmaier C, Kehrel B, Lösche W, Krause M, Mahnel R, Meyer O, Pilgrimm AK, Pillitteri D, Rott H, Santoso S, Siegemund A, Schambeck C, Scheer M, Schmugge M, Scholl T, Strauss G, Zieger B, Zotz R, Hermann M, Streif W. Diagnose angeborener Störungen der Thrombozytenfunktion. Hamostaseologie 2017; 34:201-12. [DOI: 10.5482/hamo-13-04-0024] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 05/21/2014] [Indexed: 11/05/2022] Open
Abstract
ZusammenfassungAngeborene Störungen der Thrombozytenfunktion sind eine heterogene Gruppe von Erkrankungen, die oft erst bei Auftreten von Blutungen erkannt werden. Im klinischen Bereich haben sich nur wenige Methoden zur Diagnose und Klassifizierung von angeborenen Thrombozytenfunktionsstörungen bewährt. Für eine rationelle Diagnostik ist ein stufenweises Vorgehen empfehlenswert. Anamnese und klinische Untersuchung sind Grundvoraussetzungen. Das von-Willebrand-Syndrom und andere plasmatische Gerinnungsstörungen sollten vor einer spezifischen Thrombozytenfunktionsdiagnostik immer ausgeschlossen werden. Die Bestimmung von Zahl, Größe, Volumen (MPV) und Morphologie der Thrombozyten erlauben Rückschlüsse auf die zu Grunde liegende Störung.Die PFA-100®-Verschlusszeit eignet sich als Screening zum Ausschluss schwerer Thrombozytenfunktionsstörungen. Die Aggrego metrie ermöglicht die Untersuchung zahlreicher Aspekte der Thrombozytenfunktion. Die Durchflusszytometrie ist zur Diagnose von Thrombasthenie Glanzmann, Bernard-Soulier- Syndrom und Freisetzungsstörungen geeignet. Molekulargenetische Untersuchungen können die Verdachtsdiagnose bestätigen oder zum Nachweis nicht beschriebener Defekte verwendet werden. Hier wird die ungekürzte Version der inter -disziplinären Leitlinie* präsentiert.
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Hermann M, Piza-Katzer H, Leitgeb A, Roka S, Roka R. Palliation of anastomotic tumor recurrence after esophagectomy and gastric transposition: cervico-mediastinal resection and reconstruction by using a free jejunal transplant. Dis Esophagus 2017; 11:75-77. [PMID: 29040489 DOI: 10.1093/dote/11.1.75] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 12/11/2022]
Affiliation(s)
- M Hermann
- Department of Surgery, Kaiserin Elisabeth Spital, and the Department of Plastic and Reconstructive Surgery, Krankenhaus Lainz, Vienna, Austria
| | - H Piza-Katzer
- Department of Surgery, Kaiserin Elisabeth Spital, and the Department of Plastic and Reconstructive Surgery, Krankenhaus Lainz, Vienna, Austria
| | - A Leitgeb
- Department of Surgery, Kaiserin Elisabeth Spital, and the Department of Plastic and Reconstructive Surgery, Krankenhaus Lainz, Vienna, Austria
| | - S Roka
- Department of Surgery, Kaiserin Elisabeth Spital, and the Department of Plastic and Reconstructive Surgery, Krankenhaus Lainz, Vienna, Austria
| | - R Roka
- Department of Surgery, Kaiserin Elisabeth Spital, and the Department of Plastic and Reconstructive Surgery, Krankenhaus Lainz, Vienna, Austria
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Hermann M, Yéra H, Villena I, Cimon B, Thervet E, Benachi A. Diagnosis of congenital toxoplasmosis in a renal transplant recipient mother. J Gynecol Obstet Hum Reprod 2017; 46:661-663. [DOI: 10.1016/j.jogoh.2017.08.004] [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] [Received: 05/18/2017] [Revised: 07/25/2017] [Accepted: 08/26/2017] [Indexed: 10/19/2022]
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Schwabenbauer K, Elentner A, Gruber R, Hermann M, Schmuth M, Dubrac S. 469 Xenobiotic metabolism is triggered in atopic dermatitis. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.07.665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Chandorkar P, Posch W, Zaderer V, Blatzer M, Steger M, Ammann CG, Binder U, Hermann M, Hörtnagl P, Lass-Flörl C, Wilflingseder D. Fast-track development of an in vitro 3D lung/immune cell model to study Aspergillus infections. Sci Rep 2017; 7:11644. [PMID: 28912507 PMCID: PMC5599647 DOI: 10.1038/s41598-017-11271-4] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [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: 02/22/2017] [Accepted: 08/22/2017] [Indexed: 12/14/2022] Open
Abstract
To study interactions of airborne pathogens, e.g. Aspergillus (A.) fumigatus with upper and lower respiratory tract epithelial and immune cells, we set up a perfused 3D human bronchial and small airway epithelial cell system. Culturing of normal human bronchial or small airway epithelial (NHBE, SAE) cells under air liquid interphase (ALI) and perfusion resulted in a significantly accelerated development of the lung epithelia associated with higher ciliogenesis, cilia movement, mucus-production and improved barrier function compared to growth under static conditions. Following the accelerated differentiation under perfusion, epithelial cells were transferred into static conditions and antigen-presenting cells (APCs) added to study their functionality upon infection with A. fumigatus. Fungi were efficiently sensed by apically applied macrophages or basolaterally adhered dendritic cells (DCs), as illustrated by phagocytosis, maturation and migration characteristics. We illustrate here that perfusion greatly improves differentiation of primary epithelial cells in vitro, which enables fast-track addition of primary immune cells and significant shortening of experimental procedures. Additionally, co-cultured primary DCs and macrophages were fully functional and fulfilled their tasks of sensing and sampling fungal pathogens present at the apical surface of epithelial cells, thereby promoting novel possibilities to study airborne infections under conditions mimicking the in vivo situation.
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Affiliation(s)
- P Chandorkar
- Division of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - W Posch
- Division of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - V Zaderer
- Division of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - M Blatzer
- Division of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - M Steger
- Division of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - C G Ammann
- Experimental Orthopedics, Medical University of Innsbruck, Innsbruck, Austria
| | - U Binder
- Division of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - M Hermann
- Department of Anesthesiology and Critical Care Medicine, Medical University Innsbruck, Innsbruck, Austria
| | - P Hörtnagl
- Central Institute for Blood Transfusion & Immunological Department, Medical University of Innsbruck, Innsbruck, Austria
| | - C Lass-Flörl
- Division of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - D Wilflingseder
- Division of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria.
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Siebelmann S, Bachmann B, Lappas A, Dietlein T, Hermann M, Roters S, Cursiefen C, Steven P. [Intraoperative optical coherence tomography in corneal and glaucoma surgical procedures]. Ophthalmologe 2017; 113:646-50. [PMID: 27436117 DOI: 10.1007/s00347-016-0320-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND Optical coherence tomography (OCT) is the clinical gold standard for anterior and posterior segment imaging. Since OCT devices have been integrated into surgical microscopes, this technique is also available intraoperatively in anterior segment surgery. OCT is well established in imaging very thin or transparent structures as they appear in corneal or glaucoma surgery. Therefore, intraoperative OCT can deliver important information for the surgeon which is superior to the normal surgical microscope. OBJECTIVES In the present work, an overview about the opportunities of intraoperative OCT in cornea and glaucoma surgery are presented. MATERIAL AND METHODS The recent literature (PubMed) and our own experience at the Center for Ophthalmology, University Hospital of Cologne are analysed. RESULTS Intraoperative OCT enables real-time imaging during corneal and glaucoma surgery. Several clinical studies exist, indicating its benefit, e. g. in DMEK, DALK, DSAEK, Boston Keratoprosthesis, canaloplasty or trabectome surgery. Several structures, not visible in the surgical microscope, can be visualized using intraoperative OCT. CONCLUSIONS As a real-time and high-resolution imaging device, intraoperative online OCT delivers additional information in glaucoma and corneal surgery, compared to the normal operating microscope. Nonetheless one of the main problems is the shadowing produced by surgical instruments. Today the main limitation is the lack of randomized-controlled clinical trials, evaluating the benefit of microscope-integrated intraoperative OCT, compared to the microscope.
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Affiliation(s)
- S Siebelmann
- Zentrum für Augenheilkunde, Uniklinik Köln, Kerpener Str. 62, 50924, Köln, Deutschland. .,Cluster of Excellence: Cellular Stress Responses in Aging-associated Diseases (CECAD), University of Cologne, Köln, Deutschland.
| | - B Bachmann
- Zentrum für Augenheilkunde, Uniklinik Köln, Kerpener Str. 62, 50924, Köln, Deutschland
| | - A Lappas
- Zentrum für Augenheilkunde, Uniklinik Köln, Kerpener Str. 62, 50924, Köln, Deutschland
| | - T Dietlein
- Zentrum für Augenheilkunde, Uniklinik Köln, Kerpener Str. 62, 50924, Köln, Deutschland
| | - M Hermann
- Zentrum für Augenheilkunde, Uniklinik Köln, Kerpener Str. 62, 50924, Köln, Deutschland
| | - S Roters
- Zentrum für Augenheilkunde, Uniklinik Köln, Kerpener Str. 62, 50924, Köln, Deutschland
| | - C Cursiefen
- Zentrum für Augenheilkunde, Uniklinik Köln, Kerpener Str. 62, 50924, Köln, Deutschland
| | - P Steven
- Zentrum für Augenheilkunde, Uniklinik Köln, Kerpener Str. 62, 50924, Köln, Deutschland.,Cluster of Excellence: Cellular Stress Responses in Aging-associated Diseases (CECAD), University of Cologne, Köln, Deutschland
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Salcher S, Hermann M, Kiechl-Kohlendorfer U, Ausserlechner MJ, Obexer P. C10ORF10/DEPP-mediated ROS accumulation is a critical modulator of FOXO3-induced autophagy. Mol Cancer 2017; 16:95. [PMID: 28545464 PMCID: PMC5445297 DOI: 10.1186/s12943-017-0661-4] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Accepted: 05/15/2017] [Indexed: 11/15/2022] Open
Abstract
Background Neuroblastoma is the most common solid tumor in childhood and develops from undifferentiated progenitor cells of the sympathetic nervous system. In neuronal tumor cells DNA-damaging chemotherapeutic agents activate the transcription factor FOXO3 which regulates the formation of reactive oxygen species (ROS) and cell death as well as a longevity program associated with therapy resistance. We demonstrated before that C10ORF10/DEPP, a transcriptional target of FOXO3, localizes to peroxisomes and mitochondria and impairs cellular ROS detoxification. In the present study, we investigated the impact of FOXO3 and DEPP on the regulation of autophagy. Autophagy serves to reduce oxidative damage as it triggers a self-degradative process for the removal of aggregated or misfolded proteins and damaged organelles. Methods The effect of FOXO3 and DEPP on autophagy induction was analyzed using live cell fluorescence microscopy and immunoblot analyses of SH-EP cells transfected with a plasmid for EYFP-LC3 and with siRNAs specific for LC3, respectively. ROS steady-state levels were measured with reduced MitoTrackerRed CM-H2XROS. Cellular apoptosis was analyzed by flow cytometry and the caspase 3/7 assay. Results We report for the first time that DEPP induces ROS accumulation and thereby mediates the formation of autophagosomes as inhibition of ROS formation by N-acetyl-cysteine completely blocks autophagy. We further demonstrate that H2O2-treatment triggers autophagy-induction by FOXO3-mediated DEPP expression. Importantly, knockdown of DEPP was sufficient to efficiently inhibit autophagy-induction under different stress conditions such as serum starvation and genotoxic stress, suggesting that DEPP expression is critical for the initiation of autophagy in neuroblastoma. FOXO3-triggered autophagy partially protects neuroblastoma cells from cell death. Consistent with this concept, we demonstrate that inhibition of autophagy by LC3-knockdown significantly increased etoposide- and doxorubicin-induced apoptosis. These results were also confirmed by the use of the autophagy-inhibitor chloroquine that significantly enhanced the chemotherapeutic effect of etoposide and doxorubicin in neuronal tumor cells. Conclusion Targeting FOXO3/DEPP-triggered autophagy is a promising strategy to sensitize neuroblastoma cells to chemotherapy. Electronic supplementary material The online version of this article (doi:10.1186/s12943-017-0661-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- S Salcher
- Department of Pediatrics II, Medical University Innsbruck, Innrain 66, A-6020, Innsbruck, Austria.,Tyrolean Cancer Research Institute, Innrain 66, A-6020, Innsbruck, Austria
| | - M Hermann
- Department of Anesthesiology and Critical Care Medicine, Medical University Innsbruck, Innsbruck, Austria
| | - U Kiechl-Kohlendorfer
- Department of Pediatrics II, Medical University Innsbruck, Innrain 66, A-6020, Innsbruck, Austria
| | - M J Ausserlechner
- Department of Pediatrics I, Medical University Innsbruck, Innrain 66, A-6020, Innsbruck, Austria.
| | - P Obexer
- Department of Pediatrics II, Medical University Innsbruck, Innrain 66, A-6020, Innsbruck, Austria. .,Tyrolean Cancer Research Institute, Innrain 66, A-6020, Innsbruck, Austria.
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Losada PM, Yang I, Chouvarine P, Woltemate S, Wiehlmann L, Hermann M, Bals R, Müller LV, Suerbaum S, Tümmler B. WS07.1 Comparison of T-RFLP, 16S rDNA sequencing and metagenomics of respiratory microbiota in patients with cystic fibrosis. J Cyst Fibros 2016. [DOI: 10.1016/s1569-1993(16)30096-0] [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: 11/29/2022]
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Solomon C, White NJ, Hochleitner G, Hermann M, Fries D. In search for in vivo methods to visualize clot forming in cut vessels and interrupted flow. Br J Anaesth 2016; 116:554-5. [PMID: 26994233 DOI: 10.1093/bja/aew037] [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: 11/13/2022] Open
Affiliation(s)
- C Solomon
- Marburg, Germany Salzburg, Austria Vienna, Austria
| | | | | | | | - D Fries
- Vienna, Austria Innsbruck, Austria
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Oberhuber R, Ritschl P, Fabritius C, Nguyen AV, Hermann M, Obrist P, Werner ER, Maglione M, Flörchinger B, Ebner S, Resch T, Pratschke J, Kotsch K. Treatment with tetrahydrobiopterin overcomes brain death-associated injury in a murine model of pancreas transplantation. Am J Transplant 2015; 15:2865-76. [PMID: 26104062 PMCID: PMC4744967 DOI: 10.1111/ajt.13364] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 11/13/2014] [Revised: 04/05/2015] [Accepted: 04/23/2015] [Indexed: 02/06/2023]
Abstract
Brain death (BD) has been associated with an immunological priming of donor organs and is thought to exacerbate ischemia reperfusion injury (IRI). Recently, we showed that the essential nitric oxide synthase co-factor tetrahydrobiopterin (BH4) abrogates IRI following experimental pancreas transplantation. We therefore studied the effects of BD in a murine model of syngeneic pancreas transplantation and tested the therapeutic potential of BH4 treatment. Compared with sham-operated controls, donor BD resulted in intragraft inflammation reflected by induced IL-1ß, IL-6, VCAM-1, and P-selectin mRNA expression levels and impaired microcirculation after reperfusion (p < 0.05), whereas pretreatment of the BD donor with BH4 significantly improved microcirculation after reperfusion (p < 0.05). Moreover, BD had a devastating impact on cell viability, whereas BH4-treated grafts showed a significantly higher percentage of viable cells (p < 0.001). Early parenchymal damage in pancreatic grafts was significantly more pronounced in organs from BD donors than from sham or non-BD donors (p < 0.05), but BH4 pretreatment significantly ameliorated necrotic lesions in BD organs (p < 0.05). Pretreatment of the BD donor with BH4 resulted in significant recipient survival (p < 0.05). Our data provide novel insights into the impact of BD on pancreatic isografts, further demonstrating the potential of donor pretreatment strategies including BH4 for preventing BD-associated injury after transplantation.
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Affiliation(s)
- R Oberhuber
- Center for Operative Medicine, Department of Visceral, Transplantation and Thoracic Surgery, Innsbruck Medical University, Innsbruck, Austria
| | - P Ritschl
- Center for Operative Medicine, Department of Visceral, Transplantation and Thoracic Surgery, Innsbruck Medical University, Innsbruck, Austria
| | - C Fabritius
- Center for Operative Medicine, Department of Visceral, Transplantation and Thoracic Surgery, Innsbruck Medical University, Innsbruck, Austria
| | - A-V Nguyen
- Center for Operative Medicine, Department of Visceral, Transplantation and Thoracic Surgery, Innsbruck Medical University, Innsbruck, Austria
| | - M Hermann
- Department of Anaesthesiology and Critical Care Medicine, Innsbruck Medical University, Innsbruck, Austria
| | - P Obrist
- Department of Pathology, St. Vincent's Hospital, Zams, Innsbruck, Austria
| | - E R Werner
- Division of Biological Chemistry, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - M Maglione
- Center for Operative Medicine, Department of Visceral, Transplantation and Thoracic Surgery, Innsbruck Medical University, Innsbruck, Austria
| | - B Flörchinger
- Department of Cardiothoracic Surgery, Regensburg University Hospital, Regensburg, Germany
| | - S Ebner
- Center for Operative Medicine, Department of Visceral, Transplantation and Thoracic Surgery, Innsbruck Medical University, Innsbruck, Austria
| | - T Resch
- Center for Operative Medicine, Department of Visceral, Transplantation and Thoracic Surgery, Innsbruck Medical University, Innsbruck, Austria
| | - J Pratschke
- Department of Visceral, Abdominal and Transplantation Surgery, Charité-Universitätsmedizin, Berlin, Germany
| | - K Kotsch
- Center for Operative Medicine, Department of Visceral, Transplantation and Thoracic Surgery, Innsbruck Medical University, Innsbruck, Austria
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Walldorf J, Hermann M, Porzner M, Pohl S, Metz H, Mäder K, Zipprich A, Christ B, Seufferlein T. In-vivo monitoring of acute DSS-Colitis using Colonoscopy, high resolution Ultrasound and bench-top Magnetic Resonance Imaging in Mice. Eur Radiol 2015; 25:2984-91. [PMID: 25981216 DOI: 10.1007/s00330-015-3714-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Revised: 01/07/2015] [Accepted: 03/11/2015] [Indexed: 12/13/2022]
Abstract
OBJECTIVE The aim of this study was to establish and evaluate (colour Doppler-) high-resolution-ultrasound (hrUS) and bench-top magnetic resonance imaging (btMRI) as new methods to monitor experimental colitis. MATERIALS AND METHODS hrUS, btMRI and endoscopy were performed in mice without colitis (n = 15), in mice with acute colitis (n = 14) and in mice with acute colitis and simultaneous treatment with infliximab (n = 19). RESULTS Determination of colon wall thickness using hrUS (32 MHz) and measurement of the cross-sectional colonic areas by btMRI allowed discrimination between the treatment groups (mean a vs. b vs. c - btMRI: 922 vs. 2051 vs. 1472 pixel, hrUS: 0.26 vs. 0.45 vs. 0.31 mm). btMRI, endoscopy, hrUS and colour Doppler-hrUS correlated to histological scoring (p < 0.05), while endoscopy and btMRI correlated to post-mortem colon length (p < 0.05). CONCLUSIONS The innovative in vivo techniques btMRI and hrUS are safe and technically feasible. They differentiate between distinct grades of colitis in an experimental setting, and correlate with established post-mortem parameters. In addition to endoscopic procedures, these techniques provide information regarding colon wall thickness and perfusion. Depending on the availability of these techniques, their application increases the value of in vivo monitoring in experimental acute colitis in small rodents. KEY POINTS • Improved in vivo monitoring might balance interindividual differences in murine colitis. • In monitoring murine colitis, btMRI and hrUS are safe and technically feasible. • Very short examination times underline the usefulness especially of hrUS. • Results of btMRI and hrUS correlate with endoscopic and post-mortem findings.
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Affiliation(s)
- J Walldorf
- Department of Internal Medicine I, Martin Luther University Halle-Wittenberg, Ernst-Grube-Strasse 40, 06120, Halle, Germany,
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Gussmann K, Czech C, Hermann M, Schaarschmidt-Kiener D, von Loewenich FD. Anaplasma phagocytophilum infection in a horse from Switzerland with severe neurological symptoms. SCHWEIZ ARCH TIERH 2015; 156:345-8. [PMID: 24973323 DOI: 10.1024/0036-7281/a000605] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A 22-year old mare from Switzerland was admitted to an equine clinic in May 2011. She presented with fever, lethargy, icteric mucous membranes, reduced alertness, an unsteady gait and ataxia. An Anaplasma phagocytophilum infection was confirmed by blood smear and PCR. The mare was treated with oxytetracylin and recovered rapidly, but she still suffered from a slight atactic gait disturbance at 3 weeks post infection.
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Affiliation(s)
- K Gussmann
- Institute of Medical Microbiology and Hygiene, University of Freiburg, Germany
| | - C Czech
- Equine Clinic Neugraben, Niederlenz, Switzerland
| | - M Hermann
- Equine Clinic Neugraben, Niederlenz, Switzerland
| | | | - F D von Loewenich
- Institute of Medical Microbiology and Hygiene, University of Freiburg, Germany
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Bures C, Bobak-Wieser R, Koppitsch C, Klatte T, Zielinski V, Freissmuth M, Friedrich G, Repasi R, Hermann M. Late-onset palsy of the recurrent laryngeal nerve after thyroid surgery. Br J Surg 2014; 101:1556-9. [DOI: 10.1002/bjs.9648] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2014] [Revised: 07/03/2014] [Accepted: 08/12/2014] [Indexed: 12/25/2022]
Abstract
Abstract
Background
A small subset of patients may develop late-onset palsy of the recurrent laryngeal nerve (RLN) after thyroid surgery. However, no conclusive data have been published regarding the incidence of, and possible risk factors for, this complication.
Methods
Preoperative, intraoperative and postoperative data from consecutive patients who underwent thyroid surgery at a single centre between 1999 and 2012 were analysed. Late-onset palsy of the RLN was defined as deterioration of RLN function after normal vocal cord function as investigated by routine preoperative and postoperative laryngoscopy.
Results
The cohort included 16 692 patients with 28 757 nerves at risk. Early postoperative palsy of the RLN was diagnosed in 1183 nerves at risk (4·1 per cent), whereas late-onset RLN palsy was found in 41 (0·1 per cent). Late-onset palsy of the RLN was diagnosed after a median interval of 2·5 (range 0·5–12) weeks and nerve function recovered completely in 28 patients after a median interval of 3 months. This recovery rate was significantly lower than that for early-onset RLN palsy: 1068 (90·3 per cent) of 1183 nerves (P < 0·001). No particular risk factor for late-onset RLN palsy was identified.
Conclusion
Late-onset palsy of the RLN was diagnosed in a small subset of patients after thyroid surgery, and recovery of nerve function occurred less frequently than in patients with early-onset RLN palsy.
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Affiliation(s)
- C Bures
- Second Department of Surgery, Krankenanstalt Rudolfstiftung, Vienna, Austria
- Department of Surgery, Kaiserin-Elisabeth-Spital, Vienna, Austria
| | - R Bobak-Wieser
- Second Department of Surgery, Krankenanstalt Rudolfstiftung, Vienna, Austria
- Department of Surgery, Kaiserin-Elisabeth-Spital, Vienna, Austria
| | - C Koppitsch
- Second Department of Surgery, Krankenanstalt Rudolfstiftung, Vienna, Austria
- Department of Surgery, Kaiserin-Elisabeth-Spital, Vienna, Austria
| | - T Klatte
- Second Department of Surgery, Krankenanstalt Rudolfstiftung, Vienna, Austria
- Department of Urology, Medical University of Vienna, Vienna, Austria
| | - V Zielinski
- Department of Otorhinolaryngology, Krankenanstalt Rudolfstiftung, Vienna, Austria
| | - M Freissmuth
- Institute of Pharmacology, Medical University of Vienna, Vienna, Austria
| | - G Friedrich
- Ear, Nose and Throat, University Hospital Graz, Department of Phoniatrics, Medical University of Graz, Graz, Austria
| | - R Repasi
- Department of Otorhinolaryngology, Krankenanstalt Rudolfstiftung, Vienna, Austria
| | - M Hermann
- Second Department of Surgery, Krankenanstalt Rudolfstiftung, Vienna, Austria
- Department of Surgery, Kaiserin-Elisabeth-Spital, Vienna, Austria
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Ammermann C, Cursiefen C, Hermann M. Antimikrobielles Crosslinking der Hornhaut zur Vermeidung der Keratoplastik à chaud: retrospektive Fallserie. Klin Monbl Augenheilkd 2014; 231:619-25. [DOI: 10.1055/s-0034-1368535] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- C. Ammermann
- Zentrum für Augenheilkunde, Universitätsklinikum Köln
| | - C. Cursiefen
- Zentrum für Augenheilkunde, Universitätsklinikum Köln
| | - M. Hermann
- Zentrum für Augenheilkunde, Universitätsklinikum Köln
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Hermann M. Déterminants du risque de césarienne chez les femmes obèses. Le point en France en 2010. Rev Epidemiol Sante Publique 2014. [DOI: 10.1016/j.respe.2014.02.008] [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] Open
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Praschberger M, Hermann M, Wanner J, Jirovetz L, Exner M, Kapiotis S, Gmeiner BMK, Laggner H. The uremic toxin indoxyl sulfate acts as a pro- or antioxidant on LDL oxidation. Free Radic Res 2014; 48:641-8. [PMID: 24568219 DOI: 10.3109/10715762.2014.898294] [Citation(s) in RCA: 5] [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] [Indexed: 11/13/2022]
Abstract
Uremic toxins have been shown to play a role in chronic kidney disease (CKD) associated oxidative stress. Oxidative stress and inflammation have been associated with increased risk of cardiovascular disease in uraemia. The oxidative modification of LDL may play a role in early atherogenesis. Enhanced LDL oxidation has been found in uremic patients which may account for accelerated atherosclerosis observed in CKD. The uremic toxin indoxyl sulfate (IS) has been reported to exert oxidative and antioxidative activity. Thus, in the present study we have investigated the influence of IS on the atherogenic modifications of LDL exposed in vitro to different oxidising systems. The transition metal ion (Cu(2+)) and hemin/H2O2 induced lipid oxidation reactions monitored by conjugated diene formation, were inhibited by the presence of IS, which points to possible antioxidant effects by this uremic toxin. A protective effect of IS on LDL apoprotein modification by the exposure to the product of the myeloperoxidase/H2O2/Cl(-) system HOCl, was also observed as estimated by protein carbonyl formation. In contrast, a marked increase in conjugated dienes and lipid hydroperoxides was observed when lipid oxidation was initiated by the free radical generator AAPH in presence of IS. The GC-MS analysis revealed the formation of indole-2,3-dione and 6,12-dihydro-6,12-dioxo-indolo[2,1-b]quinazoline (tryptanthrin) in IS/AAPH reaction. A scheme for the generation of tryptanthrin from IS via indoxyl radicals is proposed, which may facilitate LDL lipid oxidation. Our observations add further insight in the Janus-faced properties of this important uremic toxin.
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Affiliation(s)
- M Praschberger
- Department of Medical Chemistry and Pathobiochemistry, Center of Pathobiochemistry and Genetics, Medical University of Vienna , Vienna , Austria
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Bures C, Klatte T, Friedrich G, Kober F, Hermann M. Guidelines for complications after thyroid surgery: pitfalls in diagnosis and advices for continuous quality improvement. Eur Surg 2014. [DOI: 10.1007/s10353-013-0247-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Tonninger-Bahadori K, Bures C, Zipko HT, Klatte T, Hermann M. Intraoperative pharmacologic increase of systemic blood pressure to detect the source of hemorrhage in thyroid surgery and reoperation: a case report. Eur Surg 2013. [DOI: 10.1007/s10353-013-0235-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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