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Großpötzl M, Riedl R, Schließleder G, Hu ZJ, Michaelides M, Sadda S, Birch D, Charbel Issa P, Wedrich A, Seidel G, Scholl HPN, Strauss RW. Progression of PROM1-Associated Retinal Degeneration as Determined by Spectral-Domain Optical Coherence Tomography Over a 24-Month Period. Am J Ophthalmol 2024; 259:109-116. [PMID: 37979600 DOI: 10.1016/j.ajo.2023.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 11/06/2023] [Accepted: 11/10/2023] [Indexed: 11/20/2023]
Abstract
PURPOSE To evaluate the progression of atrophy as determined by spectral-domain optical coherence tomography (SD-OCT) in patients with molecularly confirmed PROM1-associated retinal degeneration (RD) over a 24-month period. DESIGN International, multicenter, prospective case series. METHODS A total of 13 eyes (13 patients) affected with PROM1-associated RD were enrolled at 5 sites and SD-OCT images were obtained at baseline and after 24 months. Loss of mean thickness (MT) and intact area were estimated after semi-automated segmentation for the following individual retinal layers in the central subfield (CS), inner ring, and outer ring of the ETDRS grid: retinal pigment epithelium (RPE), outer segments (OS), inner segments (IS), outer nuclear layer (ONL), inner retina (IR), and total retina (TR). RESULTS Statistically significant losses of thickness of RPE and TR were detected in the CS and inner ring and of ONL and IS in the outer ring (all P < .05); a statistically significant decrease in the intact area of RPE and IS was observed in the inner ring, and of ONL in the outer ring (all P < .05); the change in MT and the intact area of the other layers showed a trend of decline over an observational period of 24 months. CONCLUSIONS Significant thickness losses could be detected in outer retinal layers by SD-OCT over a 24-month period in patients with PROM1-associated retinal degeneration. Loss of thickness and/or intact area of such layers may serve as potential endpoints for clinical trials that aim to slow down the disease progression of PROM1-associated retinal degeneration.
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Affiliation(s)
- Manuel Großpötzl
- Department of Ophthalmology (M.G., G.S., A.W., G.S., R.W.S), Medical University Graz, Graz, Austria
| | - Regina Riedl
- Institute for Medical Informatics, Statistics and Documentation (R.R.), Medical University Graz, Graz, Austria
| | - Gernot Schließleder
- Department of Ophthalmology (M.G., G.S., A.W., G.S., R.W.S), Medical University Graz, Graz, Austria
| | - Zhihong Jewel Hu
- Doheny Eye Institute (Z.J.H., S.V.S.), David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California, USA
| | - Michel Michaelides
- Moorfields Eye Hospital (M.M., R.W.S.), NHS Foundation Trust, London, United Kingdom; UCL Institute of Ophthalmology (M.M., R.W.S.), University College London, London, United Kingdom
| | - SriniVas Sadda
- Doheny Eye Institute (Z.J.H., S.V.S.), David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California, USA
| | - David Birch
- Retina Foundation of the Southwest (D.B.), Dallas, Texas, USA
| | - Peter Charbel Issa
- Department of Ophthalmology (P.C.I.), University of Bonn, Bonn, Germany; Oxford Eye Hospital (P.C.I.), Oxford University Hospitals NHS Foundation Trust, Oxford, United Kingdom; Nuffield Laboratory of Ophthalmology (P.C.I.), Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom
| | - Andreas Wedrich
- Department of Ophthalmology (M.G., G.S., A.W., G.S., R.W.S), Medical University Graz, Graz, Austria
| | - Gerald Seidel
- Department of Ophthalmology (M.G., G.S., A.W., G.S., R.W.S), Medical University Graz, Graz, Austria
| | - Hendrik P N Scholl
- Institute of Molecular and Clinical Ophthalmology Basel (H.P.N.S.), Basel, Switzerland; Department of Ophthalmology (R.W.S.), University of Basel, Basel, Switzerland
| | - Rupert W Strauss
- Department of Ophthalmology (M.G., G.S., A.W., G.S., R.W.S), Medical University Graz, Graz, Austria; Moorfields Eye Hospital (M.M., R.W.S.), NHS Foundation Trust, London, United Kingdom; UCL Institute of Ophthalmology (M.M., R.W.S.), University College London, London, United Kingdom; Institute of Molecular and Clinical Ophthalmology Basel (H.P.N.S.), Basel, Switzerland; Wilmer Eye Institute (R.W.S.), Johns Hopkins University, Baltimore, Maryland, USA.
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Affiliation(s)
- Gerald Seidel
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
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Werkl P, Sommer M, Singer C, Tomasic H, Seidel G, Woltsche N. [Central retinal vein thrombosis in a 21-year-old man-What is the cause?]. Ophthalmologie 2023; 120:838-840. [PMID: 35947155 PMCID: PMC9364846 DOI: 10.1007/s00347-022-01703-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 07/09/2022] [Accepted: 07/15/2022] [Indexed: 12/01/2022]
Affiliation(s)
- P Werkl
- Universitätsaugenklinik Graz, Medizinische Universität Graz, Auenbruggerplatz 4, 8036, Graz, Österreich.
| | - M Sommer
- Universitätsaugenklinik Graz, Medizinische Universität Graz, Auenbruggerplatz 4, 8036, Graz, Österreich
| | - C Singer
- Universitätsaugenklinik Graz, Medizinische Universität Graz, Auenbruggerplatz 4, 8036, Graz, Österreich
| | - H Tomasic
- Universitätsaugenklinik Graz, Medizinische Universität Graz, Auenbruggerplatz 4, 8036, Graz, Österreich
| | - G Seidel
- Universitätsaugenklinik Graz, Medizinische Universität Graz, Auenbruggerplatz 4, 8036, Graz, Österreich
| | - N Woltsche
- Universitätsaugenklinik Graz, Medizinische Universität Graz, Auenbruggerplatz 4, 8036, Graz, Österreich
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Kruger M, Sommer M, Singer C, Seidel G. Self-Made Sleeve for Chandelier Light Simulation. Retina 2023; 43:531-532. [PMID: 32404845 DOI: 10.1097/iae.0000000000002847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE To develop a quick and cost-effective alternative to a chandelier light for vitrectomy. METHODS The surgical material available in an ophthalmologic operating room was used to create a sleeve for the vitrectomy light probe and tested on 30 consecutive retinal detachment cases for feasibility. RESULTS A 64 × 5-mm cotton swab stick was cut into the length of the light probe minus the length of the trocar and subsequently pierced by a blunt needle. With this sleeve, the light probe could be safely handled similar to a chandelier light during surgery. CONCLUSION A sleeve for the light probe can serve as a substitute for a chandelier light during scleral depression in retinal detachment surgery.
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Affiliation(s)
- Michael Kruger
- Department of Ophthalmology, Medical University of Graz/Austria, Graz, Austria
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Gabriel M, Djavid D, Innauer F, Ivastinovic D, Seidel G, Mayer-Xanthaki C, Ansari-Shahrezaei S, Wedrich A, Haas A. Irregular surface of the inner retina after epiretinal membrane surgery without internal limiting membrane peeling. Acta Ophthalmol 2023; 101:e115-e116. [PMID: 35735262 DOI: 10.1111/aos.15208] [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] [Received: 05/04/2022] [Accepted: 06/09/2022] [Indexed: 01/25/2023]
Affiliation(s)
| | - Daniel Djavid
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | - Felix Innauer
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | | | - Gerald Seidel
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | | | | | - Andreas Wedrich
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | - Anton Haas
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
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Bornemann A, Seidel G, Siemke L, Gottschlich L, Temucin G, Meyer A, Hartmann M, Dierks ML. Partizipative Entwicklung und Evaluation des Kurskonzepts
„KundiG – Klug und digital durch das
Gesundheitswesen“. Das Gesundheitswesen 2022. [DOI: 10.1055/s-0042-1753630] [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: 12/12/2022]
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Temucin G, Hartmann M, Seidel G, Dierks ML. Erfahrungen und Wirkung der „Gesund und aktiv leben“
– Selbstmanagementkurse im Online-Format. Das Gesundheitswesen 2022. [DOI: 10.1055/s-0042-1753569] [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: 12/12/2022]
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Klawunn R, Lander J, Seidel G, Melin S, Dierks ML. Soziale Gesundheit und Gesundheitskompetenz in Forschung und
Ausbildung aus einer interdisziplinären Perspektive –
Erfahrungen aus einem multizentrischen Promotionsprogramm zur
Gesundheitskompetenz von Menschen mit chronischen Erkrankungen. Das Gesundheitswesen 2022. [DOI: 10.1055/s-0042-1753949] [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: 12/12/2022]
Affiliation(s)
- R Klawunn
- Medizinische Hochschule Hannover, Institut für Epidemiologie,
Sozialmedizin und Gesundheitssystemforschung, Hannover,
Deutschland
| | - J Lander
- Medizinische Hochschule Hannover, Institut für Epidemiologie,
Sozialmedizin und Gesundheitssystemforschung, Hannover,
Deutschland
| | - G Seidel
- Medizinische Hochschule Hannover, Institut für Epidemiologie,
Sozialmedizin und Gesundheitssystemforschung, Hannover,
Deutschland
| | - S Melin
- Robert Bosch Stiftung, Bereich Gesundheit, Stuttgart,
Deutschland
| | - M-L Dierks
- Medizinische Hochschule Hannover, Institut für Epidemiologie,
Sozialmedizin und Gesundheitssystemforschung, Hannover,
Deutschland
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Haudum CW, Kolesnik E, Colantonio C, Mursic I, Url-Michitsch M, Tomaschitz A, Glantschnig T, Hutz B, Lind A, Schweighofer N, Reiter C, Ablasser K, Wallner M, Tripolt NJ, Pieske-Kraigher E, Madl T, Springer A, Seidel G, Wedrich A, Zirlik A, Krahn T, Stauber R, Pieske B, Pieber TR, Verheyen N, Obermayer-Pietsch B, Schmidt A. Cohort profile: 'Biomarkers of Personalised Medicine' (BioPersMed): a single-centre prospective observational cohort study in Graz/Austria to evaluate novel biomarkers in cardiovascular and metabolic diseases. BMJ Open 2022; 12:e058890. [PMID: 35393327 PMCID: PMC8991072 DOI: 10.1136/bmjopen-2021-058890] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
PURPOSE Accumulating evidence points towards a close relationship between cardiovascular, endocrine and metabolic diseases. The BioPersMed Study (Biomarkers of Personalised Medicine) is a single-centre prospective observational cohort study with repetitive examination of participants in 2-year intervals. The aim is to evaluate the predictive impact of various traditional and novel biomarkers of cardiovascular, endocrine and metabolic pathways in asymptomatic individuals at risk for cardiovascular and/or metabolic disease. PARTICIPANTS Between 2010 and 2016, we recruited 1022 regional individuals into the study. Subjects aged 45 years or older presenting with at least one traditional cardiovascular risk factor or manifest type 2 diabetes mellitus (T2DM) were enrolled. The mean age of the participants was 57±8 years, 55% were female, 18% had T2DM, 33% suffered from arterial hypertension, 15% were smokers, 42% had hyperlipidaemia, and only 26% were at low cardiovascular risk according to the Framingham 'Systematic COronary Risk Evaluation'. FINDINGS TO DATE Study procedures during screening and follow-up visits included a physical examination and comprehensive cardiovascular, endocrine, metabolic, ocular and laboratory workup with biobanking of blood and urine samples. The variety of assessed biomarkers allows a full phenotyping of individuals at cardiovascular and metabolic risk. Preliminary data from the cohort and relevant biomarker analyses were already used as control population for genomic studies in local and international research cooperation. FUTURE PLANS Participants will undergo comprehensive cardiovascular, endocrine and metabolic examinations for the next decades and clinical outcomes will be adjudicated prospectively.
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Affiliation(s)
- Christoph Walter Haudum
- Center for Biomarker Research in Medicine, Graz, Austria
- Department of Internal Medicine, Medical University, Graz, Austria
| | - Ewald Kolesnik
- Department of Internal Medicine, Medical University and University Heart Center, Graz, Austria
| | - Caterina Colantonio
- Department of Internal Medicine, Medical University and University Heart Center, Graz, Austria
| | - Ines Mursic
- Department of Internal Medicine, Medical University, Graz, Austria
| | - Marion Url-Michitsch
- Department of Internal Medicine, Medical University and University Heart Center, Graz, Austria
| | - Andreas Tomaschitz
- Department of Internal Medicine, Medical University and University Heart Center, Graz, Austria
| | - Theresa Glantschnig
- Department of Internal Medicine, Medical University and University Heart Center, Graz, Austria
| | - Barbara Hutz
- Department of Internal Medicine, Medical University, Graz, Austria
| | - Alice Lind
- Department of Internal Medicine, Medical University, Graz, Austria
| | | | - Clemens Reiter
- Department of Internal Medicine, Medical University and University Heart Center, Graz, Austria
- Department of Radiology, Medizinische Universitat, Graz, Austria
| | - Klemens Ablasser
- Department of Internal Medicine, Medical University and University Heart Center, Graz, Austria
| | - Markus Wallner
- Department of Internal Medicine, Medical University and University Heart Center, Graz, Austria
- Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | | | | | - Tobias Madl
- Gottfried Schatz Research Center, Medical University, Graz, Austria
- BioTechMed, Graz, Austria
| | - Alexander Springer
- Gottfried Schatz Research Center, Medical University, Graz, Austria
- BioTechMed, Graz, Austria
| | - Gerald Seidel
- Department of Ophthalmology, Medical University, Graz, Austria
| | - Andreas Wedrich
- Department of Ophthalmology, Medizinische Universitat, Graz, Austria
| | - Andreas Zirlik
- Department of Internal Medicine, Medical University and University Heart Center, Graz, Austria
| | - Thomas Krahn
- Department of Internal Medicine, Medical University, Graz, Austria
- Department of Pharmacology and Personalised Medicine, Maastricht University, Maastricht, The Netherlands
| | - Rudolf Stauber
- Department of Internal Medicine, Medizinische Universitat, Graz, Austria
| | - Burkert Pieske
- Department of Internal Medicine and Cardiology, Charité University Medicine, Berlin, Germany
| | - Thomas R Pieber
- Center for Biomarker Research in Medicine, Graz, Austria
- Department of Internal Medicine, Medical University, Graz, Austria
| | - Nicolas Verheyen
- Department of Internal Medicine, Medical University and University Heart Center, Graz, Austria
| | | | - Albrecht Schmidt
- Department of Internal Medicine, Medical University and University Heart Center, Graz, Austria
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Ivastinovic D, Haas A, Weger M, Seidel G, Mayer-Xanthaki C, Lindner E, Guttmann A, Wedrich A. Correction to: Vitrectomy for diabetic macular edema and the relevance of external limiting membrane. BMC Ophthalmol 2021; 21:380. [PMID: 34696761 PMCID: PMC8546958 DOI: 10.1186/s12886-021-02118-8] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Domagoj Ivastinovic
- Department of Ophthalmology, Medical University Graz, Auenbruggerplatz 4, 8036, Graz, Austria.
| | - Anton Haas
- Department of Ophthalmology, Medical University Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Martin Weger
- Department of Ophthalmology, Medical University Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Gerald Seidel
- Department of Ophthalmology, Medical University Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | | | - Ewald Lindner
- Department of Ophthalmology, Medical University Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Andreas Guttmann
- Department of Ophthalmology, Medical University Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Andreas Wedrich
- Department of Ophthalmology, Medical University Graz, Auenbruggerplatz 4, 8036, Graz, Austria
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List W, Singer C, Schwab C, Riedl R, Plhak EM, Weger M, Haas A, Wedrich A, Seidel G. Cotinine and cytokine levels in the vitreous body and blood serum of smokers and non-smokers - A pilot study. Exp Eye Res 2021; 212:108773. [PMID: 34560088 DOI: 10.1016/j.exer.2021.108773] [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: 02/28/2021] [Revised: 09/08/2021] [Accepted: 09/20/2021] [Indexed: 10/20/2022]
Abstract
Tobacco smoking is a risk factor for many ocular diseases. Of the multiple tobacco smoke compounds nicotine and its main metabolite cotinine are likely agents in disease modulation. The interaction of these compounds with exposed tissue is complex and ranges from proinflammatory to potentially neuroprotective properties. We aimed to determine cotinine and cytokines in the vitreous in smokers and non-smokers in this prospective, cross-sectional study at the Department of Ophthalmology, Medical University Graz, Austria. We included 10 smokers and 10 non-smokers. Vitreous and serum samples were analyzed for cotinine and cytokines. The cytokine analysis was performed with multiplex assay and cotinine was quantified with enzyme-linked immunosorbent assay. Cotinine was detectable in smokers only with a mean of 154.0 ng/ml ± 107.3 ng/ml in the vitreous and of 194.1 ng/ml ± 121.3 ng/ml in the serum. The difference between intraocular and systemic levels was statistically significant. There were no statistically significant differences between the cytokine levels of smokers and non-smokers. However, intravitreal VEGF-A was by trend elevated in smokers and correlated positively with intravitreal cotinine (r = 0.59, p = 0.073). In conclusion cotinine is detectable in the vitreous of smokers and is lower than the serum. There is a trend towards elevation of VEGF-A in the vitreous of smokers.
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Affiliation(s)
- Wolfgang List
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Christoph Singer
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Christoph Schwab
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Regina Riedl
- Institute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Auenbruggerplatz 2, 8036, Graz, Austria
| | - Elisabeth Maria Plhak
- Department of Nuclear Medicine, Medical University of Graz, Auenbruggerplatz 9, 8036, Graz, Austria
| | - Martin Weger
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Anton Haas
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Andreas Wedrich
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Gerald Seidel
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria.
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Ivastinovic D, Haas A, Weger M, Seidel G, Mayer-Xanthaki C, Lindner E, Guttmann A, Wedrich A. Vitrectomy for diabetic macular edema and the relevance of external limiting membrane. BMC Ophthalmol 2021; 21:334. [PMID: 34525998 PMCID: PMC8444500 DOI: 10.1186/s12886-021-02095-y] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 09/01/2021] [Indexed: 11/10/2022] Open
Abstract
PURPOSE To evaluate the relevance of external limiting membrane (ELM) on the visual and morphological results in eyes with diabetic macular edema (DME) that underwent pars plana vitrectomy (PPV) with epiretinal membrane (ERM) and internal limiting membrane (ILM) peeling. METHODS Medical records of patients with DME who underwent PPV at our unit between January 2017 and December 2019 were reviewed. We assessed preoperative and postoperative best-corrected visual acuity (BCVA), central macular thickness (CMT) using spectral domain OCT (optical coherence tomography). Exclusion criteria were previous PPV; incomplete data; concomitant diseases including retinal vein occlusion, age-related macular degeneration, uveitis; and a follow-up of less than 12 months. The surgeries were performed using 23- or 27-gauge vitrectomy. The ELM was graded depending on its configuration (grade 0 = intact, grade 1 to 3: disruption of varying extent). RESULTS Ninety-nine eyes were enrolled. The postoperative follow up averaged 23.7 months. The preoperative and final BCVA averaged 0.71 ± 0.28 and 0.52 ± 0.3 logMAR, respectively (p = 0.002). The CMT averaged 515.2 ± 209.1 μm preoperatively and 327 ± 66.1 μm postoperatively (p = 0.001). Eyes with intact ELM (n = 8) had a significantly better BCVA compared to those with ELM disruption (0.28 ± 0.14 vs. 0.7 ± 0.25 logMAR, p = 0.01). The final CMT was similar among the groups (intact ELM: 317 ± 54.6 μm; ELM disruption: 334 ± 75.2, p = 0.31). CONCLUSIONS PPV with ERM and ILM peeling is an effective treatment of DME. Eyes with intact ELM preoperatively had a significantly better final visual outcome. To maximize the benefit for patients with DME we recommend early PPV as long as ELM is intact.
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Affiliation(s)
- Domagoj Ivastinovic
- Department of Ophthalmology, Medical University Graz, Auenbruggerplatz 4, 8036, Graz, Austria.
| | - Anton Haas
- Department of Ophthalmology, Medical University Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Martin Weger
- Department of Ophthalmology, Medical University Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Gerald Seidel
- Department of Ophthalmology, Medical University Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | | | - Ewald Lindner
- Department of Ophthalmology, Medical University Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Andreas Guttmann
- Department of Ophthalmology, Medical University Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Andreas Wedrich
- Department of Ophthalmology, Medical University Graz, Auenbruggerplatz 4, 8036, Graz, Austria
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Lanz S, Seidel G, Skrabl-Baumgartner A. Golimumab in juvenile idiopathic arthritis-associated uveitis unresponsive to Adalimumab. Pediatr Rheumatol Online J 2021; 19:132. [PMID: 34419092 PMCID: PMC8380315 DOI: 10.1186/s12969-021-00630-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 07/24/2021] [Indexed: 01/01/2023] Open
Abstract
OBJECTIVE To assess the efficacy of golimumab (GLM) as a treatment option for juvenile idiopathic arthritis (JIA)-associated uveitis refractory to adalimumab (ADA). METHODS Retrospective single-centre study including patients with JIA receiving GLM for active uveitis after failing ADA. JIA- and uveitis-related data, including intraocular inflammation, best-corrected visual acuity, corticosteroid-sparing potential, and ocular complications were evaluated at start of GLM treatment, at 1 month and 3 months, and every 3 months thereafter during GLM administration. We further investigated the association of response to GLM with primary and secondary failure of ADA treatment. RESULTS Ten patients were studied, all female (17 affected eyes, mean age 14.3 + 6.7 yrs., mean follow-up 25.2 + 21.7 mos). Two patients were switched to GLM because of primary non-response to ADA. Eight were switched because of loss of response (LOR). In 5 of the latter LOR was associated with neutralizing anti-ADA-antibodies. Response to GLM was observed in all 8 patients with LOR, while the 2 patients with primary non-response to ADA also did not respond to GLM. Three of the 8 responders experienced LOR. At the end of follow-up 4 of the 5 remaining responders had achieved complete response. One had achieved partial response. CONCLUSION GLM is an efficacious therapeutic option in patients who experience LOR to ADA. Our data indicate that patients without primary response to ADA should be rather switched to a biologic agent with a different mode of action instead of further blocking the TNF-alpha pathway.
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Affiliation(s)
- Sofia Lanz
- grid.11598.340000 0000 8988 2476Division of General Pediatrics, Department of Pediatrics and Adolescent Medicine, Medical University Graz, Graz, Austria
| | - Gerald Seidel
- grid.11598.340000 0000 8988 2476Department of Ophthalmology, Medical University Graz, Graz, Austria
| | - Andrea Skrabl-Baumgartner
- Division of General Pediatrics, Department of Pediatrics and Adolescent Medicine, Medical University Graz, Graz, Austria.
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Woltsche N, Kruger MA, Weger M, Wolf IH, Seidel G. Intravitreal Steroid Treatment for Uveitis Associated with Dabrafenib and Trametinib for Metastatic Cutaneous Melanoma. Ocul Immunol Inflamm 2021; 29:845-847. [PMID: 31906779 DOI: 10.1080/09273948.2019.1695860] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 11/12/2019] [Accepted: 11/18/2019] [Indexed: 01/21/2023]
Abstract
Purpose: To report a case of bilateral retinal inflammation under long-term therapy with dabrafenib/trametinib for metastatic cutaneous melanoma.Methods: Retrospective chart review.Results: A 59-year-old patient with metastatic cutaneous melanoma diagnosed in 2004 under treatment with dabrafenib/trametinib since 2014 presented to our department with intraretinal hemorrhage and extrafoveal macula edema on the right eye and optic disc swelling on the left eye. The patient did not report visual complaints. After cessation of dabrafenib/trametinib and subconjunctival and intravitreal corticosteroid injections, optic disc swelling on the left eye recovered after 6 months. The macula edema on the right eye was treated with one intravitreal anti-VEGF (vascular endothelial growth factor) injection after encroaching upon the fovea 10 months after initial presentation. The final visual acuity was 20/20 on both eyes.Conclusion: Even after years of treatment with low dose dabrafenib/trametinib, ocular toxicity can develop. Such cases can respond well to intravitreal corticosteroids.
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Affiliation(s)
- Nora Woltsche
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | | | - Martin Weger
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | | | - Gerald Seidel
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
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15
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Marincowitz C, Webster I, Westcott C, Goswami N, de Boever P, Seidel G, Strijdom H. Vascular health assessment with flow-mediated dilatation and retinal image analysis: a pilot study in an adult population from Cape Town. Cardiovasc J Afr 2021; 32:133-140. [PMID: 33191430 PMCID: PMC8756012 DOI: 10.5830/cvja-2020-046] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 10/02/2020] [Indexed: 11/06/2022] Open
Abstract
AIM Flow-mediated dilatation (FMD) and retinal vascular analysis (RVA) may assist in predicting cardiovascular disease (CVD) but are poorly characterised in South Africa. We recorded baseline FMD and retinal vascular widths in healthy participants, and investigated associations with cardiovascular risk factors. METHODS Endothelial function (measured with FMD), microvascular structure (evaluated via fundus image analysis) and major CVD risk factors were assessed in 66 participants from Cape Town. RESULTS Median FMD% was 9.6%, with higher values in females. Mean retinal arteriolar and venular widths were ˜156 and ˜250 µm, respectively. FMD was not associated with CVD risk factors. Hypertension was associated with narrower retinal arterioles and venules. CONCLUSIONS We report novel baseline FMD data in healthy South African adults from the Western Cape, and show that retinal microvascular calibres are associated with blood pressure. Our baseline FMD and RVA data could serve as a reference for future studies in South Africa.
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Affiliation(s)
- Clara Marincowitz
- Centre for Cardio-metabolic Research in Africa, Division of Medical Physiology, Stellenbosch University, Cape Town, South Africa
| | - Ingrid Webster
- Centre for Cardio-metabolic Research in Africa, Division of Medical Physiology, Stellenbosch University, Cape Town, South Africa.
| | - Corli Westcott
- Centre for Cardio-metabolic Research in Africa, Division of Medical Physiology, Stellenbosch University, Cape Town, South Africa
| | - Nandu Goswami
- Department of Physiology and Otto Loewi Research Centre, Medical University of Graz, Austria
| | - Patrick de Boever
- Health Unit, Flemish Institute for Technological Research (VITO), Mol; Centre for Environmental Sciences, Hasselt University, Diepenbeek; Department of Biology, University of Antwerp, Wilrijk, Belgium
| | - Gerald Seidel
- Department of Ophthalmology, Medical University of Graz, Austria
| | - Hans Strijdom
- Centre for Cardio-metabolic Research in Africa, Division of Medical Physiology, Stellenbosch University, Cape Town, South Africa
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16
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Sommer M, Singer C, Djavid D, Seidel G. Imaging features and functional outcome in a case of idiopathic acute exudative polymorphous vitelliform maculopathy. Am J Ophthalmol Case Rep 2020; 20:100870. [PMID: 32875155 PMCID: PMC7452137 DOI: 10.1016/j.ajoc.2020.100870] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 07/15/2020] [Accepted: 08/09/2020] [Indexed: 11/25/2022] Open
Affiliation(s)
- Michael Sommer
- Universitäts-Augenklinik Graz, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Christoph Singer
- Universitäts-Augenklinik Graz, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Daniel Djavid
- Universitäts-Augenklinik Graz, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Gerald Seidel
- Universitäts-Augenklinik Graz, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
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17
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Scharlibbe LM, Schöps C, Heßelmann V, Friese M, Seidel G. [Overlap syndrome between primary T cell-mediated vasculitis of the brainstem and chronic lymphocytic inflammation with pontocerebellar perivascular enhancement responsive to steroids (CLIPPERS)]. Nervenarzt 2020; 91:1134-1137. [PMID: 32719927 DOI: 10.1007/s00115-020-00962-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- L M Scharlibbe
- Neurologie und Neurologische Frührehabilitation, Asklepios Klinik Nord, Tangstedter Landstraße 400, 22417, Hamburg, Deutschland.
- Neuroradiologie, Asklepios Klinik Nord, Hamburg, Deutschland.
- Neuropathologie, Asklepios Klinik Nord, Hamburg, Deutschland.
| | - C Schöps
- Neurologie und Neurologische Frührehabilitation, Asklepios Klinik Nord, Tangstedter Landstraße 400, 22417, Hamburg, Deutschland
| | - V Heßelmann
- Neuroradiologie, Asklepios Klinik Nord, Hamburg, Deutschland
| | - M Friese
- Neuropathologie, Asklepios Klinik Nord, Hamburg, Deutschland
| | - G Seidel
- Neurologie und Neurologische Frührehabilitation, Asklepios Klinik Nord, Tangstedter Landstraße 400, 22417, Hamburg, Deutschland
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18
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Schwab C, Paar M, Fengler VH, Lindner E, Haas A, Ivastinovic D, Seidel G, Weger M, Wedrich A, Oettl K. Vitreous albumin redox state in open-angle glaucoma patients and controls: a pilot study. Int Ophthalmol 2020; 40:999-1006. [PMID: 31925660 DOI: 10.1007/s10792-019-01268-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 12/30/2019] [Indexed: 12/13/2022]
Abstract
PURPOSE Numerous studies suggest that reactive oxygen species play a crucial role in the development of glaucoma. Since glaucoma patients exhibit posterior vitreous detachment earlier than controls, it has been suggested that reactive oxygen species-increased in glaucoma-also affect the vitreous. In the present study we evaluated the influence of open-angle glaucoma oxidative stress on the redox state of vitreous albumin. METHODS Albumin redox states of the vitreous and plasma were evaluated in 22 subjects-11 open-angle glaucoma patients and 11 controls-matched for age, gender, and vitreous state. According to the redox state of cysteine-34, albumin can be separated into: human mercaptalbumin (the thiol form), human nonmercaptalbumin1 (a reversible modification due to mild oxidation), and human nonmercaptalbumin2 (an irreversible modification due to severe oxidation). RESULTS Albumin of both, the open-angle glaucoma group and the control group, was more oxidized in the vitreous compared to plasma. Furthermore, significantly higher human nonmercaptalbumin1 fractions were found in the vitreous of open-angle glaucoma patients compared to controls. No significant differences were found in the plasma albumin fractions between the groups. CONCLUSION Our results support the hypothesis that oxidative stress plays a crucial role in open-angle glaucoma and that reactive oxygen species in glaucomatous eyes may also affect the vitreous.
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Affiliation(s)
- Christoph Schwab
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Margret Paar
- Physiological Chemistry, Otto-Loewi Research Center, Medical University of Graz, Neue Stiftingtalstraße 6, 8010, Graz, Austria.
| | - Vera Heike Fengler
- Physiological Chemistry, Otto-Loewi Research Center, Medical University of Graz, Neue Stiftingtalstraße 6, 8010, Graz, Austria
| | - Ewald Lindner
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Anton Haas
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Domagoj Ivastinovic
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Gerald Seidel
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Martin Weger
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Andreas Wedrich
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036, Graz, Austria
| | - Karl Oettl
- Physiological Chemistry, Otto-Loewi Research Center, Medical University of Graz, Neue Stiftingtalstraße 6, 8010, Graz, Austria
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19
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Schwab C, Paar M, Fengler VH, Ivastinovic D, Haas A, Seidel G, Glatz W, Malle EM, Weger M, Velikay-Parel M, Faustmann G, Wedrich A, Reibnegger G, Winklhofer-Roob B, Oettl K. Gender differences in albumin and ascorbic acid in the vitreous antioxidant system. Free Radic Biol Med 2020; 146:257-263. [PMID: 31705958 DOI: 10.1016/j.freeradbiomed.2019.11.008] [Citation(s) in RCA: 3] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 10/24/2019] [Accepted: 11/04/2019] [Indexed: 11/21/2022]
Abstract
Ascorbic acid is present at high concentrations in the vitreous and plays a central role in vitreous redox chemistry. Albumin is the main protein in the vitreous with antioxidant properties and occurs in different oxidation states, which can be used as redox indicators, but have not been studied in the vitreous. This study, therefore, addressed the vitreous redox state of cysteine-34 of albumin in relation to the ascorbic acid content, which has been suggested to exert a main function in detoxifying reactive oxygen in the vitreous. A total of 58 vitreous samples obtained from patients undergoing vitrectomy were analyzed for (i) human mercaptalbumin (HMA), the reduced thiol form; (ii) human non-mercaptalbumin1 (HNA1), a reversible oxidative modification with a disulfide at cysteine-34; and (iii) human non-mercaptalbumin2 (HNA2), a non-reversibly (highly) oxidized form of albumin; as well as (iv) ascorbic acid concentrations, to study possible relations. In addition, blood samples were taken to compare albumin redox state between plasma and the vitreous. Vitreous albumin showed greater variability in the redox state of cysteine-34 and a shift to the oxidized fractions compared to plasma albumin (P < 0.001). A strong positive relation was observed between the vitreous ascorbic acid concentrations and the reversibly oxidized form, HNA1 (P < 0.001), and a negative relation with the reduced form, HMA. Positive relations between ascorbic acid and HNA1 in the vitreous were stronger in men than in women. In contrast to HMA and HNA1, there was a distinct gender difference noted for the irreversibly oxidized form, HNA2. While males showed a positive relation between the vitreous ascorbic acid concentrations and HNA2, there was no correlation found with HNA2 in females. Our results support the view that ascorbic acid, by decreasing either directly or indirectly the concentrations of molecular oxygen, generates hydrogen peroxide, and that thiols, including HMA, are acting as antioxidants. This study for the first time provides evidence that vitreous albumin can be used as a marker molecule for the appearance of reactive oxygen species in the vitreous of patients undergoing vitrectomy. Moreover, it can be shown that there are gender differences in vitreous ascorbic acid and albumin concentrations as well as in oxidation state of vitreous albumin.
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Affiliation(s)
- Christoph Schwab
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036 Graz, Austria
| | - Margret Paar
- Physiological Chemistry, Otto-Loewi Research Center, Medical University of Graz, Neue Stiftingtalstraße 6, 8010 Graz, Austria.
| | - Vera Heike Fengler
- Physiological Chemistry, Otto-Loewi Research Center, Medical University of Graz, Neue Stiftingtalstraße 6, 8010 Graz, Austria
| | - Domagoj Ivastinovic
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036 Graz, Austria
| | - Anton Haas
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036 Graz, Austria
| | - Gerald Seidel
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036 Graz, Austria
| | - Wilfried Glatz
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036 Graz, Austria
| | - Eva-Maria Malle
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036 Graz, Austria
| | - Martin Weger
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036 Graz, Austria
| | - Michaela Velikay-Parel
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036 Graz, Austria
| | - Gernot Faustmann
- Human Nutrition & Metabolism Research and Training Center, Institute of Molecular Biosciences, University of Graz, Universitätsplatz 2, 8010 Graz, Austria
| | - Andreas Wedrich
- Department of Ophthalmology, Medical University of Graz, Auenbruggerplatz 4, 8036 Graz, Austria
| | - Gilbert Reibnegger
- Physiological Chemistry, Otto-Loewi Research Center, Medical University of Graz, Neue Stiftingtalstraße 6, 8010 Graz, Austria
| | - Brigitte Winklhofer-Roob
- Human Nutrition & Metabolism Research and Training Center, Institute of Molecular Biosciences, University of Graz, Universitätsplatz 2, 8010 Graz, Austria
| | - Karl Oettl
- Physiological Chemistry, Otto-Loewi Research Center, Medical University of Graz, Neue Stiftingtalstraße 6, 8010 Graz, Austria
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20
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Messner A, Werkmeister RM, Seidel G, Stegmann H, Schmetterer L, Aranha Dos Santos V. Light-induced changes of the subretinal space of the temporal retina observed via optical coherence tomography. Sci Rep 2019; 9:13632. [PMID: 31541190 PMCID: PMC6754376 DOI: 10.1038/s41598-019-50057-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 09/04/2019] [Indexed: 02/08/2023] Open
Abstract
Photoreceptor function is impaired in many retinal diseases like age-related macular degeneration. Currently, assessment of the photoreceptor function for the early diagnosis and monitoring of these diseases is either subjective, as in visual field testing, requires contact with the eye, like in electroretinography, or relies on research prototypes with acquisition speeds unattained by conventional imaging systems. We developed an objective, noncontact method to monitor photoreceptor function using a standard optical coherence tomography system. This method can be used with various white light sources for stimulation. The technique was applied in five volunteers and detected a decrease of volume of the subretinal space associated with light adaptation processes of the retina.
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Affiliation(s)
- Alina Messner
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, 1090, Vienna, Austria
| | - René M Werkmeister
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, 1090, Vienna, Austria
| | - Gerald Seidel
- Department of Ophthalmology, Medical University of Graz, 8036, Graz, Austria
| | - Hannes Stegmann
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, 1090, Vienna, Austria.,Christian Doppler Laboratory for Ocular and Dermal Effects of Thiomers, Medical University of Vienna, 1090, Vienna, Austria
| | - Leopold Schmetterer
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, 1090, Vienna, Austria.,Department of Clinical Pharmacology, Medical University of Vienna, 1090, Vienna, Austria.,Singapore Eye Research Institute, The Academia, Singapore, 169856, Singapore.,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 636921, Singapore
| | - Valentin Aranha Dos Santos
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, 1090, Vienna, Austria.
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21
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Affiliation(s)
- Christoph Singer
- Department of Ophthalmology, Medical University of Graz, Graz, Styria, Austria
| | - Michael Sommer
- Department of Ophthalmology, Medical University of Graz, Graz, Styria, Austria
| | - Gerald Seidel
- Department of Ophthalmology, Medical University of Graz, Graz, Styria, Austria
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22
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Skrabl-Baumgartner A, Seidel G, Langner-Wegscheider B, Schlagenhauf A, Jahnel J. Drug monitoring in long-term treatment with adalimumab for juvenile idiopathic arthritis-associated uveitis. Arch Dis Child 2019; 104:246-250. [PMID: 30026253 DOI: 10.1136/archdischild-2018-315060] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 06/13/2018] [Accepted: 07/03/2018] [Indexed: 11/03/2022]
Abstract
OBJECTIVES Assessing influence of anti-adalimumab (ADA) antibodies (AAA) on serum trough ADA levels and uveitis activity in long-term ADA treatment of juvenile idiopathic arthritis (JIA)-associated uveitis. PATIENTS AND INTERVENTIONS This prospective observational study included 20 patients from a single centre treated with ADA for active uveitis refractory to conventional disease-modifying antirheumatic drugs. AAA, serum ADA trough levels and uveitis activity were evaluated at regular intervals up to 6 years. RESULTS AAA were detected in nine patients (45%). Permanent AAA in seven were associated with undetectable ADA trough levels and loss of response (LOR). Transient AAA were detected in four with measurable ADA trough levels and response of uveitis to treatment, followed in two by permanent AAA associated with LOR. Use of concomitant immunosuppression was significantly higher in patients without AAA (p<0.05). CONCLUSIONS AAA-associated LOR frequently occurs in long-term treatment with ADA for JIA-associated uveitis. Concomitant immunosuppressive therapy significantly reduces the risk of LOR due to AAA.
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Affiliation(s)
| | - Gerald Seidel
- Department of Ophthalmology, Medical University Graz, Graz, Austria
| | | | - Axel Schlagenhauf
- Department of Pediatrics and Adolescent Medicine, Medical University Graz, Graz, Austria
| | - Jörg Jahnel
- Department of Pediatrics and Adolescent Medicine, Medical University Graz, Graz, Austria
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23
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Harrison M, Seidel G, Ahola J, Rhoades R, Mooney D. 113 Analyzing conflicts between biological and economic efficiencies of beef production without mature cows. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.810] [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)
- M Harrison
- Colorado State University,Fort Collins, CO, United States
| | - G Seidel
- Colorado State University,Fort Collins, CO, United States
| | - J Ahola
- Colorado State University,Fort Collins, CO, United States
| | - R Rhoades
- Colorado State University,Fort Collins, CO, United States
| | - D Mooney
- Colorado State University,Fort Collins, CO, United States
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24
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Harrison M, Seidel G, Ahola J, Rhoades R, Mooney D. PSXVI-28 Documenting production parameters associated with beef production without mature cows. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M Harrison
- Colorado State University,Fort Collins, CO, United States
| | - G Seidel
- Colorado State University,Fort Collins, CO, United States
| | - J Ahola
- Colorado State University,Fort Collins, CO, United States
| | - R Rhoades
- Colorado State University,Fort Collins, CO, United States
| | - D Mooney
- Colorado State University,Fort Collins, CO, United States
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25
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Mayer CF, Hirnschall N, Wackernagel W, Pregartner G, Seidel G, Falb T, Findl O, Ardjomand N. Late dislocation of a hydrophilic intraocular lens: risk ratios for predisposing factors and incidence rates. Acta Ophthalmol 2018; 96:e897-e898. [PMID: 29473316 DOI: 10.1111/aos.13701] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
| | - Nino Hirnschall
- Hanusch Hospital; VIROS - Vienna Institute for Research in Ocular Surgery, a Karl Landsteiner Institute; Vienna Austria
| | | | - Gudrun Pregartner
- Institute for Medical Informatics, Statistics and Documentation; Medical University of Graz; Graz Austria
| | - Gerald Seidel
- Department of Ophthalmology; Medical University of Graz; Graz Austria
| | - Thomas Falb
- Department of Ophthalmology; Medical University of Graz; Graz Austria
| | - Oliver Findl
- Hanusch Hospital; VIROS - Vienna Institute for Research in Ocular Surgery, a Karl Landsteiner Institute; Vienna Austria
- Moorfields Eye Hospital NHS foundation Trust; London UK
| | - Navid Ardjomand
- Department of Ophthalmology; Medical University of Graz; Graz Austria
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26
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Affiliation(s)
- C Kofahl
- Universitätsklinikum Hamburg-Eppendorf, Institut für Medizinische Soziologie, Hamburg, Deutschland
| | - M Haack
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover, Deutschland
| | - S Nickel
- Universitätsklinikum Hamburg-Eppendorf, Institut für Medizinische Soziologie, Hamburg, Deutschland
| | - S Werner
- Universitätsklinikum Hamburg-Eppendorf, Institut für Medizinische Soziologie, Hamburg, Deutschland
| | - G Seidel
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover, Deutschland
| | - O Knesebeck
- Universitätsklinikum Hamburg-Eppendorf, Institut für Medizinische Soziologie, Hamburg, Deutschland
| | - ML Dierks
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover, Deutschland
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27
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Temucin G, Haack M, Seidel G, Dierks ML. Rekrutierung von Menschen mit Migrationshintergrund für Selbstmanagementkurse – Erfahrungen aus der Initiative für Selbstmanagement und aktives Leben (INSEA). Das Gesundheitswesen 2018. [DOI: 10.1055/s-0038-1667613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- G Temucin
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover, Deutschland
| | - M Haack
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover, Deutschland
| | - G Seidel
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover, Deutschland
| | - ML Dierks
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover, Deutschland
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28
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Pircher N, Schwarzhans F, Holzer S, Lammer J, Schmidl D, Bata AM, Werkmeister RM, Seidel G, Garhöfer G, Gschließer A, Schmetterer L, Schmidinger G. Distinguishing Keratoconic Eyes and Healthy Eyes Using Ultrahigh-Resolution Optical Coherence Tomography-Based Corneal Epithelium Thickness Mapping. Am J Ophthalmol 2018; 189:47-54. [PMID: 29458037 DOI: 10.1016/j.ajo.2018.02.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Revised: 12/17/2017] [Accepted: 02/08/2018] [Indexed: 10/18/2022]
Abstract
PURPOSE To find differences in epithelial thickness (ET) maps of eyes with keratoconus (KC) and healthy eyes. DESIGN Institutional cross-sectional study. METHODS In this study 40 keratoconic eyes and 76 healthy eyes were scanned using a custom-built ultrahigh-resolution optical coherence tomography system. Automated segmentation ET maps with 17 subsectors were calculated (central, temporal inferior, temporal superior, nasal inferior, and nasal superior area). The thinnest point of the epithelium (minET), the thickest point of the epithelium (maxET), and the thinnest point diagonally opposing the thickest point (ETmax/op) were additional parameters. Ratios were calculated as follows: minET/diagonally opposing point (R1), maxET/diagonally opposing point (R2), inferior temporal area/superior nasal area (RTI/NS), and inferior/superior hemisphere (RI/S). Furthermore, collected parameters were analyzed regarding their diagnostic accuracy (area under the curve; AUC). RESULTS Statistically significant differences were as follows: central ET, 46.25 ± 2.56/50.91 ± 1.66; minET, 38.50 ± 2.10/46.79 ± 1.27; ETmax/op, 47.14 ± 2.45/49.60 ± 1.57; temporal inferior area: 43.93 ± 2.95/51.04 ± 1.51 (all mean ± standard deviation, μm); R1, 0.76 ± 0.09/0.93 ± 0.04; R2, 1.08 ± 0.04/1.21 ± 0.16; RTI/NS, 0.85 ± 0.08/1.02 ± 0.04; RI/S: 0.92 ± 0.07/0.99 ± 0.02. AUC values were R1: 0.979 (confidence interval [CI]: 0.957-1.000), RTI/NS: 0.977 (CI: 0.951-1.000), and minET: 0.928 (CI: 0.880-0.977). CONCLUSIONS Epithelial thickness maps could clearly visualize different ET patterns. Parameters with the highest potential of diagnostic discrimination between eyes with KC and healthy eyes were, in descending order, R1, RTI/NS, and minET. Consequently, epithelial thickness irregularity and asymmetry seem to be the most promising diagnostic factor in terms of discriminating between keratoconic eyes and healthy eyes.
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Domínguez-Martín MA, López-Lozano A, Clavería-Gimeno R, Velázquez-Campoy A, Seidel G, Burkovski A, Díez J, García-Fernández JM. Differential NtcA Responsiveness to 2-Oxoglutarate Underlies the Diversity of C/N Balance Regulation in Prochlorococcus. Front Microbiol 2018; 8:2641. [PMID: 29375510 PMCID: PMC5767323 DOI: 10.3389/fmicb.2017.02641] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 12/19/2017] [Indexed: 11/29/2022] Open
Abstract
Previous studies showed differences in the regulatory response to C/N balance in Prochlorococcus with respect to other cyanobacteria, but no information was available about its causes, or the ecological advantages conferred to thrive in oligotrophic environments. We addressed the changes in key enzymes (glutamine synthetase, isocitrate dehydrogenase) and the ntcA gene (the global nitrogen regulator) involved in C/N metabolism and its regulation, in three model Prochlorococcus strains: MED4, SS120, and MIT9313. We observed a remarkable level of diversity in their response to azaserine, a glutamate synthase inhibitor which increases the concentration of the key metabolite 2-oxoglutarate, used to sense the C/N balance by cyanobacteria. Besides, we studied the binding between the global nitrogen regulator (NtcA) and the promoter of the glnA gene in the same Prochlorococcus strains, and its dependence on the 2-oxoglutarate concentration, by using isothermal titration calorimetry, surface plasmon resonance, and electrophoretic mobility shift. Our results show a reduction in the responsiveness of NtcA to 2-oxoglutarate in Prochlorococcus, especially in the MED4 and SS120 strains. This suggests a trend to streamline the regulation of C/N metabolism in late-branching Prochlorococcus strains (MED4 and SS120), in adaptation to the rather stable conditions found in the oligotrophic ocean gyres where this microorganism is most abundant.
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Affiliation(s)
- María A Domínguez-Martín
- Departamento de Bioquímica y Biología Molecular, Campus de Excelencia Internacional Agroalimentario CeiA3, Universidad de Córdoba, Córdoba, Spain
| | - Antonio López-Lozano
- Departamento de Bioquímica y Biología Molecular, Campus de Excelencia Internacional Agroalimentario CeiA3, Universidad de Córdoba, Córdoba, Spain
| | - Rafael Clavería-Gimeno
- Institute of Biocomputation and Physics of Complex Systems (BIFI), Joint Units BIFI-IQFR-CSIC and GBsC-BIFI-CSIC, Universidad de Zaragoza, Zaragoza, Spain.,Aragon Institute for Health Research (IIS Aragon), Zaragoza, Spain.,Instituto Aragonés de Ciencias de la Salud, Zaragoza, Spain
| | - Adrián Velázquez-Campoy
- Institute of Biocomputation and Physics of Complex Systems (BIFI), Joint Units BIFI-IQFR-CSIC and GBsC-BIFI-CSIC, Universidad de Zaragoza, Zaragoza, Spain.,Aragon Institute for Health Research (IIS Aragon), Zaragoza, Spain.,Centro de Investigación Biomédica en Red en el Área Temática de Enfermedades Hepáticas y Digestivas, Barcelona, Spain.,Fundación ARAID, Gobierno de Aragón, Zaragoza, Spain
| | - Gerald Seidel
- Professur für Mikrobiologie, Department Biologie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Andreas Burkovski
- Professur für Mikrobiologie, Department Biologie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Jesús Díez
- Departamento de Bioquímica y Biología Molecular, Campus de Excelencia Internacional Agroalimentario CeiA3, Universidad de Córdoba, Córdoba, Spain
| | - José M García-Fernández
- Departamento de Bioquímica y Biología Molecular, Campus de Excelencia Internacional Agroalimentario CeiA3, Universidad de Córdoba, Córdoba, Spain
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Affiliation(s)
- Gerald Seidel
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | - Laura Pertl
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | - Franz Hafner
- Department of Angiology, Medical University of Graz, Graz, Austria
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Haack M, Kramer S, Seidel G, Nickel S, Kofahl C, Dierks ML. Wer besucht eine Selbsthilfegruppe – und warum? Ergebnisse aus der SHILD-Studie. Das Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1605778] [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)
- M Haack
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover
| | - S Kramer
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover
| | - G Seidel
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover
| | - S Nickel
- Universitätsklinikum Hamburg-Eppendorf, Institut für Medizinische Soziologie, Hamburg
| | - C Kofahl
- Universitätsklinikum Hamburg-Eppendorf, Institut für Medizinische Soziologie, Hamburg
| | - ML Dierks
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover
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Kramer S, Haack M, Seidel G, Dierks ML. Befragung von Männern mit Prostatakrebs auf Basis der Daten des Epidemiologischen Krebsregisters Niedersachen. Das Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1605974] [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)
- S Kramer
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover
| | - M Haack
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover
| | - G Seidel
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover
| | - ML Dierks
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover
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Haack M, Seidel G, Dierks ML. Selbstmanagementförderung bei chronischer Erkrankung – Evaluationsergebnisse aus den INSEA-„Gesund und aktiv leben“-Kursen. Das Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1605680] [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)
- M Haack
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover
| | - G Seidel
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover
| | - ML Dierks
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover
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Seidel G, Aschinger G, Singer C, Herzog SA, Weger M, Haas A, Werkmeister RM, Schmetterer L, Garhöfer G. Estimating Retinal Blood Flow Velocities by Optical Coherence Tomography. JAMA Ophthalmol 2017; 134:1104-1110. [PMID: 27490674 DOI: 10.1001/jamaophthalmol.2016.2507] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Importance While optical coherence tomography (OCT) angiography has been considered to evaluate retinal capillary blood flow instead of fluorescein angiography, the reflectance pattern of blood vessels on structural OCT might also provide retinal capillary flow data in the absence of fluorescein angiography. This potential has been insufficiently explored, despite promising data concerning a possible relationship between the reflectance pattern of blood vessels and their perfusion velocity in a laboratory setting. Objective To evaluate the potential of retinal blood flow velocity estimation by structural OCT. Design, Setting, and Participants Cross-sectional observational study conducted from June to November 2015 at a tertiary clinical referral center. Sixty arteries (the superior and inferior temporal arteries) from 30 eyes of 30 patients (17 female, 13 male) were included in the study. Main Outcomes and Measures Based on the intraluminal contrast patterns of retinal arteries on OCT, 3 independent graders categorized the blood flow velocities as low, medium, or high. These results and the results from a software-based intraluminal contrast analysis were compared with the retinal blood flow velocities measured by video fluorescein angiography. Results Among the 30 eyes of 30 patients (mean [SD] age, 72.6 [12.3] years; 17 female, 13 male), 15 were controls without retinal occlusion, 6 had a branch retinal artery occlusion, and 9 had a central retinal artery occlusion. When discriminating between low flow velocities and medium or high flow velocities, the graders' sensitivity ranged from 88.2% to 100% (grader 1: 88.2%; 95% CI, 63.6%-98.5%; grader 2: 88.2%; 95% CI, 63.6%-98.5%; and grader 3: 100%; 95% CI, 69.8%-100%) and their specificity ranged from 97.6% to 100% (grader 1: 100%; 95% CI, 87.7%-100%; grader 2: 97.6%; 95% CI, 87.4%-99.9%; and grader 3: 100%; 95% CI, 87.7%-100%). The κ coefficients of the comparison between the 3 graders and the angiography were 0.77 (95% CI, 0.60-0.93; P < .001), 0.64 (95% CI, 0.44-0.83; P < .001), and 0.87 (95% CI, 0.74-0.99; P < .001). In the computer-based assessment, the contrast reduction of the intraluminal pattern could be numerically expressed in a specific coefficient in the model (I2, describing the angular change of the backscattering intensity in the model), which presented nonoverlapping intervals between low flow velocities and medium or high flow velocities (mean [SD] I2, 0.3 [5.3], 20.4 [6.4], and 21.7 [4.0], respectively). Conclusions and Relevance This study suggests that a low retinal blood flow velocity reflects in a visually distinct contrast reduction of the intraluminal pattern of retinal vessels on OCT. Larger studies are required to assess the clinical benefits.
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Affiliation(s)
- Gerald Seidel
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | - Gerold Aschinger
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria
| | - Christoph Singer
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | - Sereina Annik Herzog
- Institute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Graz, Austria
| | - Martin Weger
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | - Anton Haas
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | - René Marcel Werkmeister
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria
| | - Leopold Schmetterer
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria4Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Gerhard Garhöfer
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
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Aschinger GC, Schmetterer L, Fondi K, Aranha Dos Santos V, Seidel G, Garhöfer G, Werkmeister RM. Effect of Diffuse Luminance Flicker Light Stimulation on Total Retinal Blood Flow Assessed With Dual-Beam Bidirectional Doppler OCT. ACTA ACUST UNITED AC 2017; 58:1167-1178. [DOI: 10.1167/iovs.16-20598] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Gerold C. Aschinger
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria 2Institute of Applied Physics, Vienna University of Technology, Vienna, Austria
| | - Leopold Schmetterer
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria 3Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria 4Singapore Eye Research Institute, Singapore 5Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Klemens Fondi
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Valentin Aranha Dos Santos
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria 2Institute of Applied Physics, Vienna University of Technology, Vienna, Austria
| | - Gerald Seidel
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | - Gerhard Garhöfer
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - René M. Werkmeister
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria
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Seidel G, Eggers L, Kücken D, Zukunft E, Töpper R, Majewski A, Klose K, Terborg C, Klass I, Wohlmuth P, Debacher U. Prognosefaktoren in der Frührehabilitation nach schwerem Schlaganfall. Akt Neurol 2016. [DOI: 10.1055/s-0042-118957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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)
- G. Seidel
- Neurologie und Neurologische Frührehabilitation, Asklepios Klinik Nord
| | - L. Eggers
- Neurologie und Neurologische Frührehabilitation, Asklepios Klinik Nord
| | - D. Kücken
- Neurologie und Neurologische Frührehabilitation, Asklepios Klinik Nord
| | - E. Zukunft
- Konzernbereich Qualität, Asklepios Kliniken Hamburg GmbH
| | - R. Töpper
- Neurologie, Asklepios Klinikum Harburg
| | | | - K. Klose
- Frührehabilitation, Asklepios Klinikum Harburg
| | - C. Terborg
- Fachübergreifende Frührehabilitation und Physikalische Medizin, Asklepios Klinik St. Georg
| | - I. Klass
- Fachübergreifende Frührehabilitation und Physikalische Medizin, Asklepios Klinik St. Georg
| | | | - U. Debacher
- Konzernbereich Qualität, Asklepios Kliniken Hamburg GmbH
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Fondi K, Aschinger GC, Bata AM, Wozniak PA, Liao L, Seidel G, Doblhoff-Dier V, Schmidl D, Garhöfer G, Werkmeister RM, Schmetterer L. Measurement of Retinal Vascular Caliber From Optical Coherence Tomography Phase Images. Invest Ophthalmol Vis Sci 2016; 57:OCT121-9. [PMID: 27409462 DOI: 10.1167/iovs.15-18476] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE To compare retinal vessel calibers extracted from phase-sensitive optical coherence tomography (OCT) images with vessel calibers as obtained from the Retinal Vessel Analyzer (RVA). METHODS Data from previously published studies in 13 healthy subjects breathing room air (n = 214 vessels) and 7 subjects breathing 100% oxygen (n = 101 vessels) were used. Vessel calibers from OCT phase images were measured vertically along the optical axis by three independent graders. The data from RVA fundus images were corrected for magnification to obtain absolute values. RESULTS The average vessel diameter as obtained from OCT images during normoxia was lower than from RVA images (83.8 ± 28.2 μm versus 86.6 ± 28.0 μm, P < 0.001). The same phenomenon was observed during 100% oxygen breathing (OCT: 81.0 ± 22.4 μm, RVA: 85.5 ± 26.0 μm; P = 0.001). Although the agreement between the two methods was generally high, the difference in individual vessels could be as high as 40%. These differences were neither dependent on absolute vessel size nor preferably found in specific subjects. Interobserver differences between OCT evaluators were much lower than differences between the techniques. CONCLUSIONS Extracting vessel calibers from OCT phase images may be an attractive approach to overcome some of the problems associated with fundus imaging. The source of differences in vessel caliber between the two methods remains to be investigated. In addition, it remains unclear whether OCT-based vessel caliber measurement is superior to fundus camera-based imaging in risk stratification for systemic or ocular disease. (ClinicalTrials.gov numbers, NCT00914407, NCT02531399.).
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Affiliation(s)
- Klemens Fondi
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Gerold C Aschinger
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria 3Institute of Applied Physics, Vienna University of Technology, Vienna, Austria
| | - Ahmed M Bata
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Piotr A Wozniak
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Liang Liao
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Gerald Seidel
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | - Veronika Doblhoff-Dier
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria 3Institute of Applied Physics, Vienna University of Technology, Vienna, Austria
| | - Doreen Schmidl
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria 2Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria
| | - Gerhard Garhöfer
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - René M Werkmeister
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Leopold Schmetterer
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria 2Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria
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Detert Oude Weme R, Seidel G, Kuipers OP. Probing the regulatory effects of specific mutations in three major binding domains of the pleiotropic regulator CcpA of Bacillus subtilis. Front Microbiol 2015; 6:1051. [PMID: 26483775 PMCID: PMC4591507 DOI: 10.3389/fmicb.2015.01051] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 09/14/2015] [Indexed: 11/30/2022] Open
Abstract
Carbon catabolite control is required for efficient use of available carbon sources to ensure rapid growth of bacteria. CcpA is a global regulator of carbon metabolism in Gram-positive bacteria like Bacillus subtilis. In this study the genome-wide gene regulation of a CcpA knockout and three specific CcpA mutants were studied by transcriptome analysis, to further elucidate the function of specific binding sites in CcpA. The following three amino acids were mutated to characterize their function: M17(R) which is involved in DNA binding, T62(H) which is important for the allosteric switch in CcpA upon HPr-Ser46-P binding, and R304(W) which is important for binding of the coeffectors HPr-Ser46-P and fructose-1,6-bisphosphate. The results confirm that CcpA was also involved in gene regulation in the absence of glucose. CcpA-M17R showed a small relief of Carbon Catabolite Control; the CcpA-M17R mutant regulates fewer genes than the CcpA-wt and the palindromicity of the cre site is less important for CcpA-M17R. CcpA-T62H was a stronger repressor than CcpA-wt and also acted as a strong repressor in the absence of glucose. CcpA-R304W was shown here to be less dependent on HPr-Ser46-P for its carbon catabolite control activities. The results presented here provide detailed information on alterations in gene regulation for each CcpA-mutant.
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Affiliation(s)
- Ruud Detert Oude Weme
- Molecular Genetics Group, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen Groningen, Netherlands
| | - Gerald Seidel
- Lehrstuhl für Mikrobiologie, Institut für Mikrobiologie, Biochemie und Genetik der Friedrich-Alexander Universität Erlangen-Nürnberg Erlangen, Germany
| | - Oscar P Kuipers
- Molecular Genetics Group, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen Groningen, Netherlands
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Seidel G, Haack M, Kramer S, Kofahl C, Werner S, Nickel S, dem Knesebeck OV, Dierks ML. Partizipative Forschung und Rekrutierungspfade in der Selbsthilfeforschung der SHILD-Studie. Gesundheitswesen 2015. [DOI: 10.1055/s-0035-1563131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Haack M, Seidel G, Kreinhacke M, Dierks ML. Bewertung der INSEA – Selbstmanagementkurse „Gesund und aktiv leben“ und Einschätzung des Nutzens aus Sicht der Teilnehmenden. Gesundheitswesen 2015. [DOI: 10.1055/s-0035-1562964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Seidel G, Kücken D, Eggers L, Töpper R, Majewski A, Klose K, Zukunft E, Debacher U. Qualitätsmanagement in der Frührehabilitation nach Schlaganfall – Deskriptive Analyse und Qualitätsindikatoren. Akt Neurol 2015. [DOI: 10.1055/s-0035-1554703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- G. Seidel
- Neurologie und Neurologische Frührehabilitation, Asklepios Klinik Nord, Hamburg
| | - D. Kücken
- Neurologie und Neurologische Frührehabilitation, Asklepios Klinik Nord, Hamburg
| | - L. Eggers
- Neurologie und Neurologische Frührehabilitation, Asklepios Klinik Nord, Hamburg
| | - R. Töpper
- Neurologie, Asklepios Klinik Harburg, Hamburg
| | - A. Majewski
- Neurologie, Asklepios Klinik Harburg, Hamburg
| | - K. Klose
- Fachübergreifende Frührehabilitation und Physikalische Medizin, Asklepios Klinik St. Georg, Hamburg
| | - E. Zukunft
- Konzernbereich Qualität, Asklepios Kliniken Hamburg GmbH, Hamburg
| | - U. Debacher
- Konzernbereich Qualität, Asklepios Kliniken Hamburg GmbH, Hamburg
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Läppchen C, Ringer T, Blessin J, Schulz K, Seidel G, Lange R, Hamzei F. Daily iTBS worsens hand motor training — A combined TMS, fMRI and mirror training study. Neuroimage 2015; 107:257-265. [DOI: 10.1016/j.neuroimage.2014.12.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 12/05/2014] [Accepted: 12/08/2014] [Indexed: 11/25/2022] Open
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Seidel G, Hausberger S, Herzog SA, Palkovits S, Pöschl EM, Wackernagel W, Weger M. Circadian macular volume changes in the healthy human choroid. Am J Ophthalmol 2015; 159:365-71.e2. [PMID: 25447108 DOI: 10.1016/j.ajo.2014.11.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Revised: 10/31/2014] [Accepted: 11/04/2014] [Indexed: 10/24/2022]
Abstract
PURPOSE To investigate a potential circadian fluctuation of the choroidal volume in healthy adults by enhanced depth imaging (EDI) via spectral-domain optical coherence tomography (SD OCT). DESIGN Prospective observational case series. METHODS Thirty healthy eyes of 15 healthy subjects with a median age of 26 years (range 22-55) underwent EDI SD OCT scans for macular choroidal volume measurement every 3 hours within a 24-hour period at a single tertiary center. The mean ocular perfusion pressure was calculated for each eye at each of the 8 time points as 2/3(mean arterial pressure-intraocular pressure [IOP]). The circadian fluctuation of the macular choroidal volume as well as the association with axial length, mean ocular perfusion pressure, or IOP was assessed using a linear mixed model. RESULTS Macular choroidal volume showed a significant circadian fluctuation (P < .05) and was lowest at midday (mean ± SD, 10.14 ± 2.62 mm(3)) and highest at 3 AM (mean ± SD, 10.66 ± 2.70 mm(3)). Of all factors tested, only mean ocular perfusion pressure showed a significant association with macular choroidal volume fluctuation (P = .016). CONCLUSIONS Macular choroidal volume shows a significant circadian pattern with higher values at night and lower values during the day in young adults. Besides time, mean ocular perfusion pressure is significantly associated with this fluctuation.
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Fillenberg SB, Grau FC, Seidel G, Muller YA. Structural insight into operator dre-sites recognition and effector binding in the GntR/HutC transcription regulator NagR. Nucleic Acids Res 2015; 43:1283-96. [PMID: 25564531 PMCID: PMC4333415 DOI: 10.1093/nar/gku1374] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [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] [Indexed: 01/13/2023] Open
Abstract
The uptake and metabolism of N-acetylglucosamine (GlcNAc) in Bacillus subtilis is controlled by NagR (formerly named YvoA), a member of the widely-occurring GntR/HutC family of transcription regulators. Upon binding to specific DNA operator sites (dre-sites) NagR blocks the transcription of genes for GlcNAc utilization and interaction of NagR with effectors abrogates gene repression. Here we report crystal structures of NagR in complex with operator DNA and in complex with the putative effector molecules glucosamine-6-phosphate (GlcN-6-P) and N-acetylglucosamine-6-phosphate (GlcNAc-6-P). A comparison of the distinct conformational states suggests that effectors are able to displace the NagR–DNA-binding domains (NagR–DBDs) by almost 70 Å upon binding. In addition, a high-resolution crystal structure of isolated NagR–DBDs in complex with palindromic double-stranded DNA (dsDNA) discloses both the determinants for highly sequence-specific operator dre-site recognition and for the unspecific binding of NagR to dsDNA. Extensive biochemical binding studies investigating the affinities of full-length NagR and isolated NagR–DBDs for either random DNA, dre-site-derived palindromic or naturally occurring non-palindromic dre-site sequences suggest that proper NagR function relies on an effector-induced fine-tuning of the DNA-binding affinities of NagR and not on a complete abrogation of its DNA binding.
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Affiliation(s)
- Simon B Fillenberg
- Lehrstuhl für Biotechnik, Department of Biology, Friedrich-Alexander University Erlangen-Nuremberg, Henkestrasse 91, D-91052 Erlangen, Germany
| | - Florian C Grau
- Lehrstuhl für Biotechnik, Department of Biology, Friedrich-Alexander University Erlangen-Nuremberg, Henkestrasse 91, D-91052 Erlangen, Germany
| | - Gerald Seidel
- Lehrstuhl für Mikrobiologie, Department of Biology, Friedrich-Alexander University Erlangen-Nuremberg, Staudtstrasse 5, D-91058 Erlangen, Germany
| | - Yves A Muller
- Lehrstuhl für Biotechnik, Department of Biology, Friedrich-Alexander University Erlangen-Nuremberg, Henkestrasse 91, D-91052 Erlangen, Germany
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Seidel G, Weber J, Werner S, Nickel S, Kofahl C, dem Knesebeck OV, Dierks ML. Strukturanalyse der gesundheitsbezogenen Selbsthilfe – erste Ergebnisse einer qualitativen Expertenbefragung. Gesundheitswesen 2014. [DOI: 10.1055/s-0034-1387026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Köster R, Seidel G, Bläser D, Boese R. Das THF-9-Natriumoxy-9-borabicyclo[3.3.1]nonan-Tetramer [1] / The THF-9-Sodiooxy-9-borabicyclo[3.3.1]nonane Tetramer [1]. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/znb-1994-0315] [Citation(s) in RCA: 8] [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] [Indexed: 11/15/2022]
Abstract
Abstract
The thermolysis of Na[C8H14B(Et)OH] (2), prepared from 9-Et-9-BBN (1) and NaOH, leads at about 100 °C in the presence of NaHBEt3 as catalyst to ethane and the solid NaOBC8H14 (3), which crystallizes with one mole THF as the tetrameric heterocubane 4 in the triclinic space group P1̄. The lattice constants of 4 (at 120 K) are: a = 1127.7(2), b = 1179.5(2), c = 2055.9(4) pm; α = 87.06(2), β = 87.83(2), γ = 75.37(2)°. 4 contains a slightly distorted central Na4O4 cube with C8H14B and THF substituents at the oxygen and the sodium atoms respectively. 3 can also be prepared by heating an equimolar mixture of Na[H2BC8H14] (5) and Na[(HO)2BC8H14] (6), or from (9H-9-BBN)2 and NaOH and from 9-HO-9-BBN and NaH in THF.
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Affiliation(s)
- Roland Köster
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45466 Mühlheim an der Ruhr
| | - G. Seidel
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45466 Mühlheim an der Ruhr
| | - Dieter Bläser
- Institut für Anorganische Chemie der Universität Essen, Universitätsstraße 5-7, D-45117 Essen
| | - Roland Boese
- Institut für Anorganische Chemie der Universität Essen, Universitätsstraße 5-7, D-45117 Essen
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Seidel G. Wann ist die i.v. Lyse der endovaskulären Therapie des Schlaganfalls überlegen? ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373366] [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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Schulz K, Ringer TM, Blessin J, Seidel G, Lätzsch M, Witte OW, Hamzei F. Repetitive Periphere Magnetstimulation beeinflusst die Konsolidierung motorischer Skills. KLIN NEUROPHYSIOL 2014. [DOI: 10.1055/s-0034-1371322] [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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Blessin J, Seidel G, Ringer T, Schulz K, Güllmar D, Haueisen J, Witte OW, Hamzei F. Der Effekt von tDCS auf das BOLD-Signal während motorischen Lernens. KLIN NEUROPHYSIOL 2014. [DOI: 10.1055/s-0034-1371284] [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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Dreier M, Borutta B, Seidel G, Münch I, Töppich J, Bitzer EM, Dierks ML, Walter U. [Leaflets and websites on colorectal cancer screening and their quality assessment from experts' views]. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2014; 57:356-65. [PMID: 24562712 DOI: 10.1007/s00103-013-1906-z] [Citation(s) in RCA: 2] [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] [Indexed: 10/25/2022]
Abstract
In Germany, individuals who have statutory health insurance have free access to colorectal cancer (CRC) screening tests, and can choose between a fecal occult blood test and a screening colonoscopy. Evidence-based health information may support informed choices regarding whether or not to undergo CRC screening. The aim of this study was to assess whether the available German information materials on CRC screening meet evidence-based health information standards. A systematic search was made for print media and websites on CRC screening addressed to German people with average CRC risk (search period for print media August 2010, for websites January-March 2012). The identified information was assessed with a newly developed comprehensive list of criteria. In all, 41 print media, including 28 flyers and 13 brochures, and 36 websites were identified and assessed. These materials reported more often the benefits than the risks of CRC screening, and quantified presentations of benefits and risks were less frequently given. Most of the materials called for participation and did not indicate the option to decide whether or not to attend CRC screening. This bias in favor of screening was increased by fear-provoking or downplayed wording. Most materials included false and misleading information. The requirements for evidence-based patient information were currently not met by most of the leaflets and websites in Germany. Feedback was given to the producers of the leaflets including a discussion of the findings. The results may be used to revise existing leaflets or to develop new health information on CRC screening.
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Affiliation(s)
- M Dreier
- Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, 30625, Hannover, Deutschland,
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