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Tendron A, Atallah S, Wagner I, Baujat B, Dauzier E. Varying ENT practices in adult post-intubation laryngotracheal stenosis after the COVID epidemic in France: A CHERRIES analysis. Eur Ann Otorhinolaryngol Head Neck Dis 2024:S1879-7296(24)00025-5. [PMID: 38423860 DOI: 10.1016/j.anorl.2024.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
AIM The SARS-CoV-2 pandemic may increase the incidence of iatrogenic laryngotracheal stenosis (LTS), whereas management is not well defined. The aim of this study was to survey a panel of French otorhinolaryngologists about their practices and to evaluate their needs. METHOD A national-level survey of the management of iatrogenic LTS was conducted using a 41-item questionnaire, in 4 sections, sent to a panel of French otorhinolaryngologists between July and December 2022. The main endpoint was heterogeneity in responses between 55 proposals on LTS management. RESULTS The response rate was 20% (52/263). The response heterogeneity rate was 69% (38/55). Heterogeneity concerned general questions on diagnosis (7/12, 58%) and management (7/10, 70%), LTS case management (22/27, 81%), and otorhinolaryngologists' expectations (33%, 2/6). Quality of training was considered good or excellent by only 21% of respondents. More than 80% were strongly in favor of creating national guidelines, expert centers and a national database. DISCUSSION This study demonstrated the heterogeneity of adult post-intubation LTS management between otorhinolaryngologists in France. Training quality was deemed poor or mediocre by a majority of respondents. They were in favor of creating national guidelines and expert centers in LTS.
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Affiliation(s)
- A Tendron
- Service d'Oto-rhino-laryngologie et Chirurgie Cervicofaciale, Hôpital Tenon, AP-HP, Université Paris Sorbonne, Paris, France
| | - S Atallah
- Service d'Oto-rhino-laryngologie et Chirurgie Cervicofaciale, Hôpital Tenon, AP-HP, Université Paris Sorbonne, Paris, France
| | - I Wagner
- Service d'Oto-rhino-laryngologie et Chirurgie Cervicofaciale, Hôpital Tenon, AP-HP, Université Paris Sorbonne, Paris, France
| | - B Baujat
- Service d'Oto-rhino-laryngologie et Chirurgie Cervicofaciale, Hôpital Tenon, AP-HP, Université Paris Sorbonne, Paris, France
| | - E Dauzier
- Service d'Oto-rhino-laryngologie et Chirurgie Cervicofaciale, Hôpital Tenon, AP-HP, Université Paris Sorbonne, Paris, France.
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Parrot A, Barral M, Amiot X, Bachmeyer C, Wagner I, Eyries M, Alamowitch S, Ederhy S, Epaud R, Dupuis-Girod S, Cadranel J. [Hereditary hemorrhagic telangiectasia]. Rev Mal Respir 2023; 40:391-405. [PMID: 37062633 DOI: 10.1016/j.rmr.2023.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 02/26/2023] [Indexed: 04/18/2023]
Abstract
Hereditary hemorrhagic telangiectasia, also known as Rendu-Osler - Weber disease, is a rare, autosomal dominant vascular disease, with prevalence of 1/5,000. The condition is characterized by muco-cutaneous telangiectasias, which are responsible for a hemorrhagic syndrome of variable severity, as well as arteriovenous malformations (AVMs) appearing in the lungs, the liver, and the nervous system. They can be the source of shunts, which may be associated with high morbidity (neurological ischemic stroke, brain abscess, high-output heart failure, biliary ischemia…). It is therefore crucial to establish a clinical diagnosis using the Curaçao criteria or molecular diagnosis based on genetic analysis of the ENG, ACVRL1, SMAD4 and GDF2 genes. In most cases, multidisciplinary management allows patients to have normal life expectancy. Advances in interventional radiology and better understanding of the pathophysiology of angiogenesis have resulted in improved therapeutic management. Anti-angiogenic treatments, such as bevacizumab (BVZ, an anti-VEGF antibody), have proven to be effective in cases involving bleeding complications and severe liver damage with cardiac repercussions. Other anti-angiogenic agents are currently being investigated, including tyrosine kinase inhibitors.
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Affiliation(s)
- A Parrot
- Service de pneumologie, centre de compétence de la maladie de Rendu-Osler, hôpital Tenon, AP-HP, 75020 Paris, France.
| | - M Barral
- Service de radiologie, hôpital Tenon, AP-HP, 75020 Paris, France; UFR médecine, Sorbonne université, 75006 Paris, France
| | - X Amiot
- Service de gastroentérologie, hôpital Tenon, AP-HP, 75020 Paris, France
| | - C Bachmeyer
- Service de médecine interne, hôpital Tenon, AP-HP, 75020 Paris, France
| | - I Wagner
- Service d'ORL, hôpital Tenon, AP-HP, 75020 Paris, France
| | - M Eyries
- Service de génétique, hôpital de la Pitié-Salpetrière, AP-HP, 75020 Paris, France
| | - S Alamowitch
- Service des urgences cérébrovasculaires, hôpital de la Pitié-Salpetrière, AP-HP, 75020 Paris, France
| | - S Ederhy
- Service de cardiologie et GRC no 27, hôpital Saint-Antoine, AP-HP, 75020 Paris, France
| | - R Epaud
- Service de pédiatrie, centre intercommunaux de Créteil, Créteil, France
| | - S Dupuis-Girod
- Service de génétique, centre de référence pour la maladie de Rendu-Osler, hospices civils de Lyon, hôpital Mère-Enfant, 69500 Bron, France
| | - J Cadranel
- Service de pneumologie, centre de compétence de la maladie de Rendu-Osler, hôpital Tenon, AP-HP, 75020 Paris, France; UFR médecine, Sorbonne université, 75006 Paris, France
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Talbot J, Tassart M, Aveline C, Kerrou K, Zhang Yin J, Périé S, Wagner I, Bennis M, Baujat B, Montravers F. Détection des parathyroïdes anormales : la TEP/TDM 18F-fluorocholine préalable améliore la sensibilité de l’échographie ; analyse de 300 examens pratiqués par le même échographiste. Médecine Nucléaire 2023. [DOI: 10.1016/j.mednuc.2023.01.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Wagner I, Grigoraki L, Enevoldson P, Clarkson M, Jones S, Hurst JL, Beynon RJ, Ranson H. Rapid identification of mosquito species and age by mass spectrometric analysis. BMC Biol 2023; 21:10. [PMID: 36690979 PMCID: PMC9872345 DOI: 10.1186/s12915-022-01508-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 12/21/2022] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND A rapid, accurate method to identify and to age-grade mosquito populations would be a major advance in predicting the risk of pathogen transmission and evaluating the public health impact of vector control interventions. Whilst other spectrometric or transcriptomic methods show promise, current approaches rely on challenging morphological techniques or simple binary classifications that cannot identify the subset of the population old enough to be infectious. In this study, the ability of rapid evaporative ionisation mass spectrometry (REIMS) to identify the species and age of mosquitoes reared in the laboratory and derived from the wild was investigated. RESULTS The accuracy of REIMS in identifying morphologically identical species of the Anopheles gambiae complex exceeded 97% using principal component/linear discriminant analysis (PC-LDA) and 84% based on random forest analysis. Age separation into 3 different age categories (1 day, 5-6 days, 14-15 days) was achieved with 99% (PC-LDA) and 91% (random forest) accuracy. When tested on wild mosquitoes from the UK, REIMS data could determine the species and age of the specimens with accuracies of 91 and 90% respectively. CONCLUSIONS The accuracy of REIMS to resolve the species and age of Anopheles mosquitoes is comparable to that achieved by infrared spectroscopy approaches. The processing time and ease of use represent significant advantages over current, dissection-based methods. Importantly, the accuracy was maintained when using wild mosquitoes reared under differing environmental conditions, and when mosquitoes were stored frozen or desiccated. This high throughput approach thus has potential to conduct rapid, real-time monitoring of vector populations, providing entomological evidence of the impact of alternative interventions.
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Affiliation(s)
- Iris Wagner
- Centre for Proteome Research, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, L69 7ZB UK
| | - Linda Grigoraki
- Department of Vector Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA UK
| | - Peter Enevoldson
- Walton Centre NHS Foundation Trust, Lower Lane, Liverpool, L9 7LJ UK
- Department of Livestock and One Health, University of Liverpool, Institute of Infection, Veterinary and Ecological Sciences, Leahurst Campus, Neston, CH64 7TE UK
| | - Michael Clarkson
- Department of Livestock and One Health, University of Liverpool, Institute of Infection, Veterinary and Ecological Sciences, Leahurst Campus, Neston, CH64 7TE UK
| | - Sam Jones
- International Pheromone Systems Ltd, Evolution House, Long Acres Road, Clayhill Industrial Estate, Neston, CH64 3RL Cheshire UK
| | - Jane L. Hurst
- Mammalian Behaviour and Evolution Group, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Leahurst Campus, Neston, CH64 7TE UK
| | - Robert J. Beynon
- Centre for Proteome Research, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, L69 7ZB UK
| | - Hilary Ranson
- Department of Vector Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA UK
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Morgan J, Salcedo-Sora JE, Wagner I, Beynon RJ, Triana-Chavez O, Strode C. Rapid Evaporative Ionization Mass Spectrometry (REIMS): a Potential and Rapid Tool for the Identification of Insecticide Resistance in Mosquito Larvae. J Insect Sci 2022; 22:5. [PMID: 36082679 PMCID: PMC9459442 DOI: 10.1093/jisesa/ieac052] [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] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Indexed: 06/15/2023]
Abstract
Insecticide resistance is a significant challenge facing the successful control of mosquito vectors globally. Bioassays are currently the only method for phenotyping resistance. They require large numbers of mosquitoes for testing, the availability of a susceptible comparator strain, and often insectary facilities. This study aimed to trial the novel use of rapid evaporative ionization mass spectrometry (REIMS) for the identification of insecticide resistance in mosquitoes. No sample preparation is required for REIMS and analysis can be rapidly conducted within hours. Temephos resistant Aedes aegypti (Linnaeus) larvae from Cúcuta, Colombia and temephos susceptible larvae from two origins (Bello, Colombia, and the lab reference strain New Orleans) were analyzed using REIMS. We tested the ability of REIMS to differentiate three relevant variants: population source, lab versus field origin, and response to insecticide. The classification of these data was undertaken using linear discriminant analysis (LDA) and random forest. Classification models built using REIMS data were able to differentiate between Ae. aegypti larvae from different populations with 82% (±0.01) accuracy, between mosquitoes of field and lab origin with 89% (±0.01) accuracy and between susceptible and resistant larvae with 85% (±0.01) accuracy. LDA classifiers had higher efficiency than random forest with this data set. The high accuracy observed here identifies REIMS as a potential new tool for rapid identification of resistance in mosquitoes. We argue that REIMS and similar modern phenotyping alternatives should complement existing insecticide resistance management tools.
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Affiliation(s)
- Jasmine Morgan
- Department of Biology, Edge Hill University, Ormskirk, Lancashire, L39 4QP, UK
| | | | - Iris Wagner
- Centre for Proteome Research, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Crown Street, Liverpool L69 7ZB, UK
| | - Robert J Beynon
- Centre for Proteome Research, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Crown Street, Liverpool L69 7ZB, UK
| | - Omar Triana-Chavez
- Instituto de Biología, Facultad de Ciencias Exactas y Naturales (FCEN), University of Antioquia, Medellín, Colombia
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Sigley A, Ng H, Chouhan H, Suhardja T, Srivastava R, Wagner I. Impact of a comprehensive geriatric assessment on post-operative outcomes for older adults presenting for colorectal cancer surgery: A retrospective cross-sectional cohort study. J Geriatr Oncol 2021. [DOI: 10.1016/s1879-4068(21)00428-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mallmann S, Klinger CJ, Claßen J, Wagner I, Klima A, Castelletti N, Müller RS. Clinical relevance of intradermal test results in atopic dogs. Tierarztl Prax Ausg K Kleintiere Heimtiere 2021; 49:349-356. [PMID: 34670310 DOI: 10.1055/a-1584-4965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
TOPIC AND AIMS Canine atopic dermatitis (AD) is an inflammatory and pruritic skin disease and in most cases associated with IgE antibodies against environmental allergens. To date, the only causative therapeutic option is allergen immunotherapy (AIT). Offending allergens for AIT can be identified by intradermal testing (IDT) or serum allergen-specific IgE testing. The aim of the study was to evaluate positive IDT results considering the atopic dogs' clinical history. MATERIAL AND METHODS An IDT was performed on 48 atopic dogs and their owners completed a detailed questionnaire about the seasonal course of their pruritus. Results of IDT were correlated with the seasonal occurrence of pruritus. RESULTS The most common positive IDT reactions were observed to mite allergens (33.3-62.5 %). Prevalence of positive reactions to individual tree, grass and weed pollen ranged between 8.3 % and 25 %. Moulds and epithelial allergens produced positive reactions in only 0-6.3 %. A correlation between positive IDT reactions and course of pruritus could neither be found for perennial nor for seasonal allergens. CONCLUSION The evaluation of IDT reactions may not be an optimal method for identification of clinically relevant allergens in canine AD. CLINICAL RELEVANCE The results of this study emphasise the importance of considering clinical history in addition to allergy test results in the formulation of an allergen extract for desensitisation.
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Affiliation(s)
- Stefanie Mallmann
- Small Animal Medicine Clinic, Centre for Clinical Veterinary Medicine, LMU Munich, Germany
| | - Christoph J Klinger
- Small Animal Medicine Clinic, Centre for Clinical Veterinary Medicine, LMU Munich, Germany
| | - Janine Claßen
- Small Animal Medicine Clinic, Centre for Clinical Veterinary Medicine, LMU Munich, Germany
| | - Iris Wagner
- Small Animal Medicine Clinic, Centre for Clinical Veterinary Medicine, LMU Munich
| | - Andre Klima
- Statistical consulting unit StaBLab, Department of Statistics, LMU Munich
| | - Noemi Castelletti
- Statistical consulting unit StaBLab, Department of Statistics, LMU Munich
| | - Ralf S Müller
- Small Animal Medicine Clinic, Centre for Clinical Veterinary Medicine, LMU Munich
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Wagner I. Gesellschaftliche Wandlungsprozesse als Anlass für veränderte Anforderungen an Mediziner und Patienten - Patientenberatung als Übersetzungsinstrument zwischen medizinischen Möglichkeiten und individuellen Bedürfnissen der Patienten. Das Gesundheitswesen 2021. [DOI: 10.1055/s-0041-1732076] [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: 10/20/2022]
Affiliation(s)
- I Wagner
- Otto-von-Guericke-Universität Magdeburg, Fakultät für Humanwissenschaften - Institut I
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Wagner I, Koch NI, Sarsby J, White N, Price TAR, Jones S, Hurst JL, Beynon RJ. The application of rapid evaporative ionization mass spectrometry in the analysis of Drosophila species-a potential new tool in entomology. Open Biol 2020; 10:200196. [PMID: 33234068 PMCID: PMC7729031 DOI: 10.1098/rsob.200196] [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: 07/02/2020] [Accepted: 10/29/2020] [Indexed: 11/12/2022] Open
Abstract
There is increasing emphasis on the use of new analytical approaches in subject analysis and classification, particularly in respect to minimal sample preparation. Here, we demonstrate that rapid evaporative ionization mass spectrometry (REIMS), a method that captures metabolite mass spectra after rapid combustive degradation of an intact biological specimen, generates informative mass spectra from several arthropods, and more specifically, is capable of discerning differences between species and sex of several adult Drosophila species. A model including five Drosophila species, built using pattern recognition, achieves high correct classification rates (over 90%) using test datasets and is able to resolve closely related species. The ease of discrimination of male and female specimens also demonstrates that sex-specific differences reside in the REIMS metabolite patterns, whether analysed across all five species or specifically for D. melanogaster. Further, the same approach can correctly discriminate and assign Drosophila species at the larval stage, where these are morphologically highly similar or identical. REIMS offers a novel approach to insect typing and analysis, requiring a few seconds of data acquisition per sample and has considerable potential as a new tool for the field biologist.
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Affiliation(s)
- Iris Wagner
- Centre for Proteome Research, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Crown Street, Liverpool L69 7ZB, UK
| | - Natalie I. Koch
- Centre for Proteome Research, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Crown Street, Liverpool L69 7ZB, UK
| | - Joscelyn Sarsby
- Centre for Proteome Research, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Crown Street, Liverpool L69 7ZB, UK
| | - Nicola White
- Ecology and Evolution Group, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Crown Street, Liverpool L69 7ZB, UK
| | - Tom A. R. Price
- Ecology and Evolution Group, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Crown Street, Liverpool L69 7ZB, UK
| | - Sam Jones
- International Pheromone Systems Ltd, Unit 8, West Float Industrial Estate, Millbrook Road, Wallasey, Wirral CH41 1FL, UK
| | - Jane L. Hurst
- Mammalian Behaviour and Evolution Group, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Leahurst Campus, Neston CH64 7TE, UK
| | - Robert J. Beynon
- Centre for Proteome Research, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Crown Street, Liverpool L69 7ZB, UK
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Chatelet F, Wagner I, Bizard A, Hans S, Chabolle F, Bach CA. Does advanced age affect treatment of early glottic carcinoma? Eur Ann Otorhinolaryngol Head Neck Dis 2020; 138:68-72. [PMID: 32654987 DOI: 10.1016/j.anorl.2020.06.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AIMS Early glottic carcinoma is currently managed by radiation therapy or endoscopic surgery. Both are effective in elderly patients, but their respective indications are poorly determined. The present study assessed our management of very elderly patients with early glottic carcinoma. MATERIAL AND METHODS A retrospective single-center study included all patients aged 75 years and older at diagnosis, treated by radiation therapy or endoscopic surgery with curative intent for T1 or T2 glottic carcinoma between 2004 and 2018. RESULTS Records of 33 patients (27 men and 6 women; mean age, 82.2 years (range, 76.1-93.1 years)) were reviewed. 24 patients received radiation therapy and 9 endoscopic resection. The only factor for choice of treatment was anterior commissure involvement. Overall survival was 87% at 2 years and 62% at 5 years. 19% of patients relapsed within 5 years and had to undergo further treatment. There were no treatment-related deaths. Radiation therapy was associated with more acute local complications, with two temporary treatment interruptions and one uncompleted treatment. Surgical treatment was more likely to result in dysphonia, found in 80% of cases. CONCLUSION Treatment of early glottic cancer in elderly subjects can consist in either radiotherapy or endoscopic surgery. Age should not affect management. Surgical treatment is shorter and better tolerated, although with poorer vocal outcome, and may be preferred in the most comorbid patients.
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Affiliation(s)
- F Chatelet
- Service d'ORL et de Chirurgie Cervico-Faciale, Hôpital Foch, 92150 Suresnes, France
| | - I Wagner
- Service d'ORL et de Chirurgie Cervico-Faciale, Hôpital Foch, 92150 Suresnes, France
| | - A Bizard
- Service de Gériatrie, Hôpital Foch, 92150 Suresnes, France
| | - S Hans
- Service d'ORL et de Chirurgie Cervico-Faciale, Hôpital Foch, 92150 Suresnes, France; Université de Versailles Saint-Quentin en Yvelines, UFR de Médecine Paris Ouest Saint-Quentin en Yvelines, Guyancourt 78280, France
| | - F Chabolle
- Service d'ORL et de Chirurgie Cervico-Faciale, Hôpital Foch, 92150 Suresnes, France; Université de Versailles Saint-Quentin en Yvelines, UFR de Médecine Paris Ouest Saint-Quentin en Yvelines, Guyancourt 78280, France
| | - C-A Bach
- Service d'ORL et de Chirurgie Cervico-Faciale, Hôpital Foch, 92150 Suresnes, France.
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Pape UF, Kasper S, Meiler J, Sinn M, Vogel A, Mueller L, Burkhard O, Caca K, Heeg S, Rodriguez Laval V, Kuhl A, Arsenic R, Jansen H, Mehrling T, Hilgier K, Wagner I, Utku N. Post-hoc analyses of a subgroup of patients with advanced biliary tract cancer (BTC) who crossed over to treatment with etoposide toniribate (EDO-S7.1) in a randomized phase II study. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz247.051] [Citation(s) in RCA: 2] [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: 11/14/2022] Open
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Regl C, Wohlschlager T, Esser-Skala W, Wagner I, Samonig M, Holzmann J, Huber CG. Dilute-and-shoot analysis of therapeutic monoclonal antibody variants in fermentation broth: a method capability study. MAbs 2019; 11:569-582. [PMID: 30668249 PMCID: PMC6512939 DOI: 10.1080/19420862.2018.1563034] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Monoclonal antibodies (mAbs) are widely applied as highly specific and efficient therapeutic agents for various medical conditions, including cancer, inflammatory and autoimmune diseases. As protein production in cellular systems inherently generates a multitude of molecular variants, manufacturing of mAbs requires stringent control in order to ensure safety and efficacy of the drugs. Moreover, monitoring of mAb variants in the course of the fermentation process may allow instant tuning of process parameters to maintain optimal cell culture conditions. Here, we describe a fast and robust workflow for the characterization of mAb variants in fermentation broth. Sample preparation is minimal in that the fermentation broth is shortly centrifuged before dilution and HPLC-MS analysis in a short 15-min gradient run. In a single analysis, N-glycosylation and truncation variants of the expressed mAb are identified at the intact protein level. Simultaneously, absolute quantification of mAb content in fermentation broth is achieved. The whole workflow features excellent robustness as well as retention time and peak area stability. Additional enzymatic removal of N-glycans enables determination of mAb glycation levels, which are subsequently considered in relative N-glycoform quantification to correct for isobaric galactosylation. Several molecular attributes of the expressed therapeutic protein may thus be continuously monitored to ensure the desired product profile. Application of the described workflow in an industrial environment may therefore substantially enhance in-process control in mAb production, as well as targeted biosimilar development.
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Affiliation(s)
- Christof Regl
- a Department of Biosciences, Bioanalytical Research Labs , University of Salzburg , Salzburg , Austria.,b Christian Doppler Laboratory for Innovative Tools for Biosimilar Characterization , University of Salzburg , Salzburg , Austria
| | - Therese Wohlschlager
- a Department of Biosciences, Bioanalytical Research Labs , University of Salzburg , Salzburg , Austria.,b Christian Doppler Laboratory for Innovative Tools for Biosimilar Characterization , University of Salzburg , Salzburg , Austria
| | - Wolfgang Esser-Skala
- a Department of Biosciences, Bioanalytical Research Labs , University of Salzburg , Salzburg , Austria.,b Christian Doppler Laboratory for Innovative Tools for Biosimilar Characterization , University of Salzburg , Salzburg , Austria
| | - Iris Wagner
- a Department of Biosciences, Bioanalytical Research Labs , University of Salzburg , Salzburg , Austria.,b Christian Doppler Laboratory for Innovative Tools for Biosimilar Characterization , University of Salzburg , Salzburg , Austria
| | - Martin Samonig
- a Department of Biosciences, Bioanalytical Research Labs , University of Salzburg , Salzburg , Austria.,b Christian Doppler Laboratory for Innovative Tools for Biosimilar Characterization , University of Salzburg , Salzburg , Austria.,c Thermo Fisher Scientific GmbH , Germering , Germany
| | - Johann Holzmann
- b Christian Doppler Laboratory for Innovative Tools for Biosimilar Characterization , University of Salzburg , Salzburg , Austria.,d Technical Development Biosimilars , Global Drug Development, Novartis, Sandoz GmbH , Kundl , Austria
| | - Christian G Huber
- a Department of Biosciences, Bioanalytical Research Labs , University of Salzburg , Salzburg , Austria.,b Christian Doppler Laboratory for Innovative Tools for Biosimilar Characterization , University of Salzburg , Salzburg , Austria
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Holzmeier F, Wolf TJA, Gienger C, Wagner I, Bozek J, Nandi S, Nicolas C, Fischer I, Gühr M, Fink RF. Normal and resonant Auger spectroscopy of isocyanic acid, HNCO. J Chem Phys 2018; 149:034308. [DOI: 10.1063/1.5030621] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- F. Holzmeier
- Institut des Sciences Moléculaire d’Orsay (CNRS), Université Paris-Sud, Université Paris-Saclay, 91405 Orsay, France
- Synchrotron SOLEIL, 91192 Gif-sur-Yvette, France
| | - T. J. A. Wolf
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - C. Gienger
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, 72076 Tübingen, Germany
| | - I. Wagner
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg, 97074 Würzburg, Germany
| | - J. Bozek
- Synchrotron SOLEIL, 91192 Gif-sur-Yvette, France
| | - S. Nandi
- Department of Physics, Lund University, 221 00 Lund, Sweden
| | - C. Nicolas
- Synchrotron SOLEIL, 91192 Gif-sur-Yvette, France
| | - I. Fischer
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg, 97074 Würzburg, Germany
| | - M. Gühr
- Institut für Physik und Astronomie Universität Potsdam, 14476 Potsdam, Germany
| | - R. F. Fink
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, 72076 Tübingen, Germany
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Szklarek S, Wagner I, Jurczak T, Zalewski M. Sequential Sedimentation-Biofiltration System for the purification of a small urban river (the Sokolowka, Lodz) supplied by stormwater. J Environ Manage 2018; 205:201-208. [PMID: 28987916 DOI: 10.1016/j.jenvman.2017.09.066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 09/17/2017] [Accepted: 09/23/2017] [Indexed: 06/07/2023]
Abstract
The study analyses the efficiency of a Sequentional Sedimentation-Biofiltration System (SSBS) built on the Sokolowka river in Lodz (Poland). It was constructed to purify a small urban river whose hydrological regime is dominated by stormwater and meltwater. The SSBS was constructed on a limited area as multi-zone constructed wetlands. The SSBS consists of three zones: sedimentation zone with structures added to improve sedimentation, a geochemical barrier made of limestone deposit and biofiltration zone. The purification processes of total suspended solids (TSS), total phosphorus (TP), total nitrogen (TP) and other nutrients: phosphates (PO43-), ammonium (NH4+) and nitrates (NO3-) of the SSBS were analyzed. Chloride (Cl-) reduction was investigated. Monitoring conducted in the first two hydrological years after construction indicated that the SSBS removed 61.4% of TSS, 37.3% of TP, 30.4% of PO43-, 46.1% of TN, 2.8% of NH4+, 44.8% of NO3- and 64.0% of Cl-. The sedimentation zone played a key role in removing TSS and nutrients. The geochemical barrier and biofiltration zone each significantly improved overall efficiency by 4-10% for TSS, PO43-, TN, NO3- and Cl-. Although the system reduced the concentration of chloride, further studies are needed to determine the circulation of Cl- in constructed wetlands (CWs), and to assess its impact on purification processes.
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Affiliation(s)
- S Szklarek
- European Regional Centre for Ecohydrology of the Polish Academy of Sciences, Tylna 3, 90-364, Lodz, Poland.
| | - I Wagner
- Department of Applied Ecology, Faculty of Biology and Environmental Protection,University of Lodz, 90-237 Lodz, 12/16 Banacha str., Poland
| | - T Jurczak
- Department of Applied Ecology, Faculty of Biology and Environmental Protection,University of Lodz, 90-237 Lodz, 12/16 Banacha str., Poland
| | - M Zalewski
- Department of Applied Ecology, Faculty of Biology and Environmental Protection,University of Lodz, 90-237 Lodz, 12/16 Banacha str., Poland
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Wagner I, Geh KJ, Hubert M, Winter G, Weber K, Classen J, Klinger C, Mueller RS. Preliminary evaluation of cytosine-phosphate-guanine oligodeoxynucleotides bound to gelatine nanoparticles as immunotherapy for canine atopic dermatitis. Vet Rec 2017; 181:118. [PMID: 28526774 DOI: 10.1136/vr.104230] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2017] [Indexed: 11/04/2022]
Abstract
Cytosine-phosphate-guanine oligodeoxynucleotides (CpG ODN) are a promising new immunotherapeutic treatment option for canine atopic dermatitis (AD). The aim of this uncontrolled pilot study was to evaluate clinical and immunological effects of gelatine nanoparticle (GNP)-bound CpG ODN (CpG GNP) on atopic dogs. Eighteen dogs with AD were treated for 8 weeks (group 1, n=8) or 18 weeks (group 2, n=10). Before inclusion and after 2 weeks, 4 weeks, 6 weeks (group 1+2), 8 weeks, 12 weeks and 16 weeks (group 2) 75 µg CpG ODN/dog (bound to 1.5 mg GNP) were injected subcutaneously. Pruritus was evaluated daily by the owner. Lesions were evaluated and serum concentrations and mRNA expressions of interferon-γ, tumour necrosis factor-α, transforming growth factor-β, interleukin (IL) 10 and IL-4 (only mRNA expression) were determined at inclusion and after 8 weeks (group 1+2) and 18 weeks (group 2). Lesions and pruritus improved significantly from baseline to week 8. Mean improvements from baseline to week 18 were 23 per cent and 44 per cent for lesions and pruritus, respectively, an improvement of ≥50 per cent was seen in six out of nine and three out of six dogs, respectively. IL-4 mRNA expression decreased significantly. The results of this study show a clinical improvement of canine AD with CpG GNP comparable to allergen immunotherapy. Controlled studies are needed to confirm these findings.
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Affiliation(s)
- I Wagner
- Clinic of Small Animal Medicine, Center for Clinical Veterinary Medicine, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany
| | - K J Geh
- Department of Pharmacy, Pharmaceutical Technology & Biopharmaceutics, LMU Munich, Butenandtstrasse 5, 81377 Munich, Germany
| | - M Hubert
- Department of Pharmacy, Pharmaceutical Technology & Biopharmaceutics, LMU Munich, Butenandtstrasse 5, 81377 Munich, Germany
| | - G Winter
- Department of Pharmacy, Pharmaceutical Technology & Biopharmaceutics, LMU Munich, Butenandtstrasse 5, 81377 Munich, Germany
| | - K Weber
- Clinic of Small Animal Medicine, Center for Clinical Veterinary Medicine, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany
| | - J Classen
- Clinic of Small Animal Medicine, Center for Clinical Veterinary Medicine, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany
| | - C Klinger
- Clinic of Small Animal Medicine, Center for Clinical Veterinary Medicine, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany
| | - R S Mueller
- Clinic of Small Animal Medicine, Center for Clinical Veterinary Medicine, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany
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Latus H, Wagner I, Khalil M, Kerst G, Kreuder J, Schranz D, Apitz C. Invasive Testing in Children with Persistent or Recurrent Pulmonary Arterial Hypertension following Complete Surgical Repair of Congenital Heart Disease. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571945] [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: 10/22/2022]
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Bach C, Dreyfus J, Wagner I, Lachiver X, Guth A, Chabolle F. Comparison of radial forearm flap and thoracodorsal artery perforator flap donor site morbidity for reconstruction of oral and oropharyngeal defects in head and neck cancer. Eur Ann Otorhinolaryngol Head Neck Dis 2015; 132:185-9. [DOI: 10.1016/j.anorl.2015.06.003] [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: 11/16/2022]
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Szklarek S, Stolarska M, Wagner I, Mankiewicz-Boczek J. The microbiotest battery as an important component in the assessment of snowmelt toxicity in urban watercourses--preliminary studies. Environ Monit Assess 2015; 187:16. [PMID: 25626567 PMCID: PMC4308638 DOI: 10.1007/s10661-014-4252-1] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 12/29/2014] [Indexed: 05/17/2023]
Abstract
The aim of the study was to use a battery of biotests composed of producers (Selenastrum capricornutum, Sorghum saccharatum, Lepidium sativum, and Sinapis alba), consumers (Thamnocephalus platyurus), and decomposers (Tetrahymena thermophila) to evaluate the toxicity of snowmelt and winter storm water samples. The toxicity of the samples collected in the winter period December to February (2010-2011), in one of the largest agglomerations in Poland, the city of Lodz, was compared to that of storm water samples taken under similar conditions in June. The most toxic snowmelt samples were found to be high acute hazard (class IV), while the remaining samples were rated as slight acute hazard (class II). L. sativum (in the Phytotox test) was the most sensitive test organism, giving 27 % of all toxic responses, followed by S. capricornutum with 23 % of all responses. T. thermophila was the least sensitive, with only 2 % of all toxic responses. The greatest range of toxicity was demonstrated by samples from the single family house catchment: no acute hazard (class I) to high acute hazard (class IV).
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Affiliation(s)
- S Szklarek
- European Regional Centre for Ecohydrology, Polish Academy of Sciences, 3, Tylna Str., 90-364, Lodz, Poland,
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Picard A, Cardinne C, Denoux Y, Wagner I, Chabolle F, Bach CA. Extranodal lymphoma of the head and neck: a 67-case series. Eur Ann Otorhinolaryngol Head Neck Dis 2014; 132:71-5. [PMID: 25553969 DOI: 10.1016/j.anorl.2014.07.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 07/02/2014] [Accepted: 07/05/2014] [Indexed: 12/11/2022]
Abstract
UNLABELLED The present study sought to describe clinical presentation in extranodal lymphoma of the head and neck (ELHN), with the aim of improving diagnostic management. MATERIAL AND METHODS A single-center retrospective observational study was conducted over the period 2001-13. Age, gender, histologic type, location, type of clinical presentation, time interval between symptom onset and histologic diagnosis and presence of specific symptoms were recorded, as were the specialty of the physician initially consulted and of the physician taking the diagnostic sample. RESULTS Sixty-seven cases of ELHN were diagnosed: 39 male and 28 female patients, with a median age of 68 years. B-cell lymphoma (84%) was more frequent than plasmacytoma (7%) or T-cell lymphoma (6%). Location was mainly palatine tonsil (28%), nasal fossa and sinus (19%), nasopharynx (14%) or parotid (13%). Revelation often involved a mass (33%), and only rarely any specific symptoms (9%). Time interval from symptom onset to diagnosis was short in aggressive lymphoma and longer in low-grade lymphoma (mean 4 and 10 months respectively). The physician initially consulted was an ENT specialist in 67% of cases, and an ENT specialist performed diagnostic sampling in 97% of cases. CONCLUSION ELHN is a rare pathology (5 cases per year in our department) of highly variable clinical presentation depending on location and histologic type. The ENT physician should be prepared for diagnosis regardless of anatomic location, so as to optimize diagnostic management.
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Affiliation(s)
- A Picard
- Service de chirurgie ORL et cervico-faciale, hôpital Foch, 40, rue Worth, 92150 Suresnes, France
| | - C Cardinne
- Service de chirurgie ORL et cervico-faciale, hôpital Foch, 40, rue Worth, 92150 Suresnes, France; Université de Versailles Saint-Quentin-en-Yvelines, UFR de médecine Paris Ouest Saint-Quentin-en-Yvelines, 78280 Guyancourt, France
| | - Y Denoux
- Service d'anatomo-pathologie, hôpital Foch, 40, rue Worth, 92150 Suresnes, France
| | - I Wagner
- Service de chirurgie ORL et cervico-faciale, hôpital Foch, 40, rue Worth, 92150 Suresnes, France
| | - F Chabolle
- Service de chirurgie ORL et cervico-faciale, hôpital Foch, 40, rue Worth, 92150 Suresnes, France; Université de Versailles Saint-Quentin-en-Yvelines, UFR de médecine Paris Ouest Saint-Quentin-en-Yvelines, 78280 Guyancourt, France
| | - C A Bach
- Service de chirurgie ORL et cervico-faciale, hôpital Foch, 40, rue Worth, 92150 Suresnes, France; Université de Versailles Saint-Quentin-en-Yvelines, UFR de médecine Paris Ouest Saint-Quentin-en-Yvelines, 78280 Guyancourt, France.
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Bach CA, Wagner I, Pigot JL, Guth A, Denoux Y, Chabolle F. Velopharyngeal function after free thoracodorsal artery perforator flap in lateral and superior oropharyngeal cancer. Eur Arch Otorhinolaryngol 2014; 272:3019-26. [DOI: 10.1007/s00405-014-3279-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Accepted: 09/02/2014] [Indexed: 11/28/2022]
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Löffler D, Müller U, Scheuermann K, Wagner I, Friebe D, Gesing J, Körner A. Obesity-associated alterations in the circadian rhythm of the myokine irisin. DIABETOL STOFFWECHS 2014. [DOI: 10.1055/s-0034-1374952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Lachmann R, Wagner I, Devia DH, Strehlow H. Substitution Reactions of Beryllium (II) Ion in Mixed Solvents. I. The Beryllium Sulphate Complex in Water-Formamide Mixtures. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/bbpc.197800092] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Nagy ZK, Wagner I, Suhajda A, Tobak T, Harasztos AH, Vigh T, Soti PL, Pataki H, Molnar K, Marosi G. Nanofibrous solid dosage form of living bacteria prepared by electrospinning. EXPRESS POLYM LETT 2014. [DOI: 10.3144/expresspolymlett.2014.39] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Winder K, Engelhorn T, Wagner I, Crodel C, Schramm M, Koehn J, Linker R, Lee DH, Hilz M. Location and volume of multiple sclerosis lesions predict enhanced or decreased female sexual function. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.1358] [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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Winder K, Engelhorn T, Wagner I, Crodel C, Schramm M, Koehn J, Linker R, Lee D, Hilz M. Site and size of Multiple Sclerosis lesions deteriorate or improve erectile dysfunction. Auton Neurosci 2013. [DOI: 10.1016/j.autneu.2013.05.021] [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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Koehn J, Wagner I, Schramm M, Crodel C, Staykov D, Pauli E, Kolominsky-Rabas P, Schwab S, Hilz M. Ischemic stroke compromises male sexual function. Auton Neurosci 2013. [DOI: 10.1016/j.autneu.2013.05.019] [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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Sergeyev E, Wagner I, Neef M, Adler M, Körner A, Kiess W. Störungen des Kohlenhydratstoffwechsels bei Kindern und Jugendlichen mit Adipositas. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2013; 56:511-6. [DOI: 10.1007/s00103-012-1636-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Wagner I, Volbers B, Kloska S, Doerfler A, Schwab S, Staykov D. Sex differences in perihemorrhagic edema evolution after spontaneous intracerebral hemorrhage. Eur J Neurol 2012; 19:1477-81. [DOI: 10.1111/j.1468-1331.2011.03628.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bach CA, Wagner I, Lachiver X, Guth A, Baglin AC, Chabolle F. The free thoracodorsal artery perforator flap in head and neck reconstruction. Eur Ann Otorhinolaryngol Head Neck Dis 2012; 129:167-71. [DOI: 10.1016/j.anorl.2011.12.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 12/04/2011] [Accepted: 12/12/2011] [Indexed: 11/25/2022]
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Hilz M, Schramm M, Cordel C, Staykov D, Pauli E, Kolominsky-Rabas P, Schwab S, Wagner I. Erectile Dysfunction (ED) after Ischemic Stroke - Association between Prevalence and Localization of Lesion (P07.025). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p07.025] [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: 11/15/2022] Open
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Bach CA, Wagner I, Lachiver X, Baujat B, Chabolle F. Botulinum toxin in the treatment of post-radiosurgical neck contracture in head and neck cancer: A novel approach. Eur Ann Otorhinolaryngol Head Neck Dis 2012; 129:6-10. [PMID: 22104582 DOI: 10.1016/j.anorl.2011.07.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Accepted: 07/01/2011] [Indexed: 11/30/2022]
Affiliation(s)
- C-A Bach
- Service de chirurgie ORL et cervicofaciale, hôpital Foch, 40 rue Worth, Suresnes, France.
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Abstract
BACKGROUND Experimental evidence indicates that iron plays a key role in edema formation after intracerebral hemorrhage (ICH). We investigated the relationship between ICH radiopacity on CT as a marker of hematoma iron content and perihemorrhagic edema (PHE) after ICH. METHODS We retrospectively investigated patients with spontaneous lobar and ganglionic supratentorial ICH who received follow-up CT scans during the first 7days after symptom onset (d1, d2-4, d5-7). Measurements of ICH and edema volumes were taken using a semiautomatic threshold-based volumetric algorithm. Radiopacity of the blood clot was determined using the mean Hounsfield unit (HU) count of the ICH. RESULTS A total of 117 patients aged 71.92±11.55years with spontaneous ICH (34.63±32.44ml) were included in the analysis. Mean ICH radiopacity was 59.7±3.4HU. We found significantly larger relative PHE at d2-4 (1.7±0.9 vs. 1.3±0.8; P=0.032) and d5-7 (2.0±1.3 vs. 1.3±0.9; P=0.007) and larger peak relative PHE (2.3±1.6 vs. 1.6±1.1; P=0.006) in patients with ICH radiopacity >60HU (n=59), as compared to patients with ICH radiopacity <60HU (n=58). CONCLUSIONS Higher ICH radiopacity, reflecting higher in vivo hematoma iron content, is associated with more PHE after ICH.
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Affiliation(s)
- I Wagner
- Department of Neurology, University of Erlangen-Nuremberg, Erlangen, Germany.
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Raschpichler M, Dittrich K, Sorge I, Hirsch W, Wagner I, Gausche R, Bertram R, Körner A. MR-basierte Quantifizierung von Ganzkörper- und Leberfett bei Kindern und Jugendlichen. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1286225] [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: 10/17/2022]
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Baujat B, Altabaa K, Meyers M, Wagner I, Leclerc C, Chabolle F. Medicoeconomic study of microsurgical head and neck reconstructions. Eur Ann Otorhinolaryngol Head Neck Dis 2011; 128:121-6. [DOI: 10.1016/j.anorl.2011.01.002] [Citation(s) in RCA: 5] [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] [Received: 10/11/2010] [Revised: 01/03/2011] [Accepted: 01/09/2011] [Indexed: 11/24/2022]
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Dummer R, Rinderknecht J, Goldinger SM, Wagner I, Mitchell L, Veronese ML, Nick S, Hilfiker P, Gobbi S. An open-label pilot study of vemurafenib in previously treated metastatic melanoma patients with brain metastases. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.8548] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Lang S, Kääb A, Pechstädt J, Flügel WA, Zeil P, Lanz E, Kahuda D, Frauenfelder R, Casey K, Füreder P, Sossna I, Wagner I, Janauer G, Exler N, Boukalova Z, Tapa R, Lui J, Sharma N. Assessing components of the natural environment of the Upper Danube and Upper Brahmaputra river basins. Adv Sci Res 2011. [DOI: 10.5194/asr-7-21-2011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Abstract. A comprehensive understanding of the interplay between the natural environment and the human dimension is one of the prerequisites to successful and sustaining IWRM practises in large river basins such as the Upper Brahmaputra river basin or the Upper Danube river basin. These interactions, their dynamics and changes, and the likely future scenarios were investigated in the BRAHMATWINN project with a series of tools from remote sensing and geoinformatics. An integrated assessment of main components of the natural environment in the two river basins as well as in five reference catchments within those basins, has led to the delineation of hydrological response units (HRUs). HRUs are spatial units bearing a uniform behaviour in terms of the hydrological response regime, as a function of physical parameters land use, soil type, water, vegetation cover and climate. Besides the delineated HRUs which are available in a spatially exhaustive manner for all reference catchments, the following information were provided as spatial layers: (1) uniform digital surface models of both the twinned basins and the reference catchments; (2) glacier areas and the magnitude of glacier loss; (3) mountain permafrost distribution and identification of areas particularly affected by permafrost thaw; (4) a consistent land use/land cover information in all reference catchments; and (5) the vulnerabilities of wetlands and groundwater in terms of anthropogenic impact and climate change.
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Wagner I, Staykov D, Volbers B, Kloska S, Dörfler A, Schwab S, Bardutzky J. Therapeutic hypothermia for space-occupying Herpes simplex virus encephalitis. Minerva Anestesiol 2011; 77:371-374. [PMID: 21364501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Development of space-occupying edema in patients with severe Herpes simplex virus encephalitis is a major factor for high morbidity and mortality. Conventional intracranial pressure-lowering modalities are limited and more aggressive treatment options for such patients have rarely been described. This article reports on a HIV-positive patient with Herpes simplex type 2 encephalitis and elevated intracranial pressure refractory to medical therapy. Induced moderate hypothermia of 33 °C resulted in fast and sustained control of intracranial pressure. After three months, the patient had a fairly good functional outcome with a Glasgow Outcome Scale score of 4.
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Affiliation(s)
- I Wagner
- Department of Neurology, University Hospital of Erlangen, University of Erlangen-Nuremberg, Erlangen, Germany.
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Flache S, Bierbach B, Wagner I, Gläser L, Menger M, Bomberg H, Groesdonk H, Schaefers HJ. Role of vasoactive endothelin system on splanchnic perfusion during cardiopulmonary bypass. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Volbers B, Staykov D, Wagner I, Doerfler A, Schwab S, Bardutzky J. Teaching NeuroImages: A look beneath the surface in a "typical" thalamic hemorrhage. Neurology 2010; 75:e40. [DOI: 10.1212/wnl.0b013e3181eee4c2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Perwitz N, Wenzel J, Wagner I, Büning J, Drenckhan M, Zarse K, Ristow M, Lilienthal W, Lehnert H, Klein J. Cannabinoid type 1 receptor blockade induces transdifferentiation towards a brown fat phenotype in white adipocytes. Diabetes Obes Metab 2010; 12:158-66. [PMID: 19895638 DOI: 10.1111/j.1463-1326.2009.01133.x] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIM The endocannabinoid (EC) system is a major component in the control of energy homeostasis. It mediates a positive energy balance via central and peripheral pathways. Blockade of the cannabinoid type 1 receptor induces weight reduction and improves cardiovascular risk factors in overweight patients. Cannabinoid receptor type 1 (CB1R)-deficient mice are resistant to diet-induced obesity. The mechanisms responsible for these effects remain only partially elucidated. We hypothesized peripheral effects via direct modulation of adipocyte function to be an integral part of EC action on energy metabolism and insulin sensitivity. METHODS SV40 immortalized murine white and brown adipocytes were used for all experiments. We investigated the effect of CB1R blockade by stimulating the cells acutely and chronically with rimonabant, a selective antagonist for the CB1R, or by knocking down the receptor with small interfering RNA (siRNA). Changes in thermogenic mRNA and protein expression as well as mitochondrial biogenesis and function were assessed by real-time RT-PCR, immunoblotting, fluorescent staining techniques, electron microscopy and by measuring oxygen consumption. RESULTS Acute and chronic blockade of the CB1R with the selective antagonist rimonabant or by siRNA in murine white adipocytes strongly induced the thermogenic uncoupling protein-1 (UCP-1). UCP-1 expression was increased in a time- and dose-dependent manner both at the RNA and protein level. Furthermore, this effect was paralleled by enhanced peroxisome proliferator-activated receptor gamma coactivator 1alpha (PGC-1alpha) expression. In accordance with these findings, AMP-activated protein kinase (AMPK) phosphorylation was also increased after rimonabant treatment. Mitochondria-specific fluorescent staining demonstrated an augmentation in the number of mitochondria. This was confirmed by electron microscopy images. Moreover, rimonabant treatment enhanced the cytochrome c oxidase activity and increased cellular oxygen consumption. CONCLUSIONS Taken together, our data demonstrate that inhibition of peripheral CB1R action in adipocytes directly promotes transdifferentiation of white adipocytes into a mitochondria-rich, thermogenic brown fat phenotype. Enhanced thermogenesis and insulin sensitivity may represent a peripheral mechanism contributing to weight loss and improved glucose homeostasis in rimonabant-treated patients.
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Affiliation(s)
- N Perwitz
- Department of Internal Medicine I, University of Luebeck, 23538 Luebeck, Germany
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Cerff M, Wagner I, Kipf E, Radtke C, Posten C. Kinetische Untersuchungen zum Wachstum des MoosesPhyscomitrella patensunter verschiedenen Lichtbedingungen. CHEM-ING-TECH 2009. [DOI: 10.1002/cite.200950326] [Citation(s) in RCA: 4] [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: 11/12/2022]
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Pirner S, Tingelhoff K, Wagner I, Westphal R, Rilk M, Wahl FM, Bootz F, Eichhorn KWG. CT-based manual segmentation and evaluation of paranasal sinuses. Eur Arch Otorhinolaryngol 2008; 266:507-18. [PMID: 18716789 DOI: 10.1007/s00405-008-0777-7] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2008] [Accepted: 07/16/2008] [Indexed: 10/21/2022]
Abstract
Manual segmentation of computed tomography (CT) datasets was performed for robot-assisted endoscope movement during functional endoscopic sinus surgery (FESS). Segmented 3D models are needed for the robots' workspace definition. A total of 50 preselected CT datasets were each segmented in 150-200 coronal slices with 24 landmarks being set. Three different colors for segmentation represent diverse risk areas. Extension and volumetric measurements were performed. Three-dimensional reconstruction was generated after segmentation. Manual segmentation took 8-10 h for each CT dataset. The mean volumes were: right maxillary sinus 17.4 cm(3), left side 17.9 cm(3), right frontal sinus 4.2 cm(3), left side 4.0 cm(3), total frontal sinuses 7.9 cm(3), sphenoid sinus right side 5.3 cm(3), left side 5.5 cm(3), total sphenoid sinus volume 11.2 cm(3). Our manually segmented 3D-models present the patient's individual anatomy with a special focus on structures in danger according to the diverse colored risk areas. For safe robot assistance, the high-accuracy models represent an average of the population for anatomical variations, extension and volumetric measurements. They can be used as a database for automatic model-based segmentation. None of the segmentation methods so far described provide risk segmentation. The robot's maximum distance to the segmented border can be adjusted according to the differently colored areas.
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Affiliation(s)
- S Pirner
- Clinic und Policlinic of Otolaryngology/Ear, Nose and Throat Surgery, University of Bonn, Bonn, Germany.
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Tingelhoff K, Moral AI, Kunkel ME, Rilk M, Wagner I, Eichhorn KG, Wahl FM, Bootz F. Comparison between manual and semi-automatic segmentation of nasal cavity and paranasal sinuses from CT images. ACTA ACUST UNITED AC 2008; 2007:5505-8. [PMID: 18003258 DOI: 10.1109/iembs.2007.4353592] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Segmentation of medical image data is getting more and more important over the last years. The results are used for diagnosis, surgical planning or workspace definition of robot-assisted systems. The purpose of this paper is to find out whether manual or semi-automatic segmentation is adequate for ENT surgical workflow or whether fully automatic segmentation of paranasal sinuses and nasal cavity is needed. We present a comparison of manual and semi-automatic segmentation of paranasal sinuses and the nasal cavity. Manual segmentation is performed by custom software whereas semi-automatic segmentation is realized by a commercial product (Amira). For this study we used a CT dataset of the paranasal sinuses which consists of 98 transversal slices, each 1.0 mm thick, with a resolution of 512 x 512 pixels. For the analysis of both segmentation procedures we used volume, extension (width, length and height), segmentation time and 3D-reconstruction. The segmentation time was reduced from 960 minutes with manual to 215 minutes with semi-automatic segmentation. We found highest variances segmenting nasal cavity. For the paranasal sinuses manual and semi-automatic volume differences are not significant. Dependent on the segmentation accuracy both approaches deliver useful results and could be used for e.g. robot-assisted systems. Nevertheless both procedures are not useful for everyday surgical workflow, because they take too much time. Fully automatic and reproducible segmentation algorithms are needed for segmentation of paranasal sinuses and nasal cavity.
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Affiliation(s)
- K Tingelhoff
- Clinic and Policlinic of Otolaryngology/Ear, Nose and Throat Surgery, University of Bonn, Germany.
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Guenzinger R, Wildhirt S, Voegele K, Wagner I, Schwaiger M, Bauernschmitt R, Lange R. Comparison of Magnetic Resonance Imaging and Transthoracic Echocardiography for the Identification of LV Mass and Volume Regression Indices 6 months after Mitral Valve Repair. J Card Surg 2008; 23:126-32. [DOI: 10.1111/j.1540-8191.2007.00558.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [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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