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Leiz M, Knorr M, Moon K, Tischler L, Sohrabi K, Cantez S, Däbritz J, de Laffolie J, van den Berg N. How can patient registries facilitate guideline-based healthcare? A retrospective analysis of the CEDATA-GPGE registry for pediatric inflammatory bowel disease. BMC Health Serv Res 2023; 23:648. [PMID: 37330476 DOI: 10.1186/s12913-023-09639-6] [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: 07/27/2022] [Accepted: 06/03/2023] [Indexed: 06/19/2023] Open
Abstract
BACKGROUND Early diagnosis is mandatory for the medical care of children and adolescents with pediatric-onset inflammatory bowel disease (PIBD). International guidelines ('Porto criteria') of the European Society for Pediatric Gastroenterology, Hepatology and Nutrition recommend medical diagnostic procedures in PIBD. Since 2004, German and Austrian pediatric gastroenterologists document diagnostic and treatment data in the patient registry CEDATA-GPGE on a voluntary basis. The aim of this retrospective study was to analyze whether the registry CEDATA-GPGE reflects the Porto criteria and to what extent diagnostic measures of PIBD according to the Porto criteria are documented. METHODS Data of CEDATA-GPGE were analyzed for the period January 2014 to December 2018. Variables representing the Porto criteria for initial diagnostic were identified and categorized. The average of the number of measures documented in each category was calculated for the diagnoses CD, UC, and IBD-U. Differences between the diagnoses were tested by Chi-square test. Data on possible differences between data documented in the registry and diagnostic procedures that were actually performed were obtained via a sample survey. RESULTS There were 547 patients included in the analysis. The median age of patients with incident CD (n = 289) was 13.6 years (IQR: 11.2-15.2), of patients with UC (n = 212) 13.1 years (IQR: 10.4-14.8) and of patients with IBD-U (n = 46) 12.2 years (IQR: 8.6-14.7). The variables identified in the registry fully reflect the recommendations by the Porto criteria. Only the disease activity indices PUCAI and PCDAI were not directly provided by participants but calculated from obtained data. The category 'Case history' were documented for the largest part (78.0%), the category 'Imaging of the small bowel' were documented least frequently (39.1%). In patients with CD, the categories 'Imaging of the small bowel' (χ2 = 20.7, Cramer-V = 0.2, p < 0.001) and 'Puberty stage' (χ2 = 9.8, Cramer-V = 0.1, p < 0.05) were documented more often than in patients with UC and IBD-U. CONCLUSION The registry fully reproduces the guideline's recommendations for the initial diagnosis of PIBD. The proportion of documented diagnostic examinations varied within the diagnostic categories and between the diagnoses. Despite technological innovations, time and personnel capacities at participating centers and study center are necessary to ensure reliable data entry and to enable researchers to derive important insights into guideline-based care.
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Affiliation(s)
- M Leiz
- Institute for Community Medicine, University Medicine, Greifswald, Germany.
| | - M Knorr
- Institute for Community Medicine, University Medicine, Greifswald, Germany
| | - K Moon
- Institute for Community Medicine, University Medicine, Greifswald, Germany
| | - L Tischler
- Institute for Community Medicine, University Medicine, Greifswald, Germany
| | - K Sohrabi
- Technical University of Applied Sciences, Giessen, Germany
| | - S Cantez
- General Pediatrics & Neonatology, Justus-Liebig-University, Giessen, Germany
| | - J Däbritz
- Department of Pediatrics, Greifswald University Medical Center, Greifswald, Germany
| | - J de Laffolie
- General Pediatrics & Neonatology, Justus-Liebig-University, Giessen, Germany
| | - N van den Berg
- Institute for Community Medicine, University Medicine, Greifswald, Germany
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Knorr M, Manceau JM, Mornhinweg J, Nespolo J, Biasiol G, Tran NL, Malerba M, Goulain P, Lafosse X, Jeannin M, Stefinger M, Carusotto I, Lange C, Colombelli R, Huber R. Intersubband Polariton-Polariton Scattering in a Dispersive Microcavity. Phys Rev Lett 2022; 128:247401. [PMID: 35776456 DOI: 10.1103/physrevlett.128.247401] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 03/10/2022] [Accepted: 04/15/2022] [Indexed: 06/15/2023]
Abstract
The ultrafast scattering dynamics of intersubband polaritons in dispersive cavities embedding GaAs/AlGaAs quantum wells are studied directly within their band structure using a noncollinear pump-probe geometry with phase-stable midinfrared pulses. Selective excitation of the lower polariton at a frequency of ∼25 THz and at a finite in-plane momentum k_{‖} leads to the emergence of a narrowband maximum in the probe reflectivity at k_{‖}=0. A quantum mechanical model identifies the underlying microscopic process as stimulated coherent polariton-polariton scattering. These results mark an important milestone toward quantum control and bosonic lasing in custom-tailored polaritonic systems in the mid and far infrared.
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Affiliation(s)
- M Knorr
- Department of Physics, University of Regensburg, 93040 Regensburg, Germany
| | - J M Manceau
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS UMR 9001, Université Paris Saclay, 91120 Palaiseau, France
| | - J Mornhinweg
- Department of Physics, University of Regensburg, 93040 Regensburg, Germany
| | - J Nespolo
- INO-CNR BEC Center and Dipartimento di Fisica, Universita di Trento, I-38123 Povo, Italy
| | - G Biasiol
- Laboratorio TASC, CNR-IOM, Area Science Park, 34149 Basovizza, Trieste, Italy
| | - N L Tran
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS UMR 9001, Université Paris Saclay, 91120 Palaiseau, France
| | - M Malerba
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS UMR 9001, Université Paris Saclay, 91120 Palaiseau, France
| | - P Goulain
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS UMR 9001, Université Paris Saclay, 91120 Palaiseau, France
| | - X Lafosse
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS UMR 9001, Université Paris Saclay, 91120 Palaiseau, France
| | - M Jeannin
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS UMR 9001, Université Paris Saclay, 91120 Palaiseau, France
| | - M Stefinger
- Department of Physics, University of Regensburg, 93040 Regensburg, Germany
| | - I Carusotto
- INO-CNR BEC Center and Dipartimento di Fisica, Universita di Trento, I-38123 Povo, Italy
| | - C Lange
- Department of Physics, TU Dortmund University, 44227 Dortmund, Germany
| | - R Colombelli
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS UMR 9001, Université Paris Saclay, 91120 Palaiseau, France
| | - R Huber
- Department of Physics, University of Regensburg, 93040 Regensburg, Germany
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Knorr M, Hofmann AB, Miteva D, Noboa V, Rauen K, Frauenfelder F, Seifritz E, Quednow BB, Vetter S, Egger ST. Relationship Between Time of Admission, Help-Seeking Behavior, and Psychiatric Outcomes: "From Dusk Till Dawn". Front Psychiatry 2022; 13:842936. [PMID: 35573363 PMCID: PMC9091816 DOI: 10.3389/fpsyt.2022.842936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 03/09/2022] [Indexed: 11/13/2022] Open
Abstract
INTRODUCTION Day and time of admission influence treatment outcomes and prognosis in several medical specialties; this seems related to resources' ability. It is largely unknown whether this also applies to mental health services. We investigate the relationship between time of admission, patients' demographic and clinical profile, and treatment outcomes. METHODS Demographic and clinical profiles of admitted and discharged patients to a general psychiatric ward between January 1st, 2013 and December 31st, 2020, were analyzed. In addition, we used the last year (i.e., 2020) to monitor rehospitalization. Time of admission was defined as weekdays (working day, weekend) and dayshifts (daytime, dusk, and dawn). RESULTS During the study period, 12,449 patient admissions occurred. The mean age of the sample was 48.05 ± 20.90 years, with 49.32% (n = 6,140) females. Most admissions (n = 10,542, 84%) occurred on working days. Two-fifths of admissions (39.7%, n = 4,950) were compulsory, with a higher rate outside daytime hours. Patients had slight differences in the clinical profile, resulting from evaluating the different items of the Health of Nation Outcome Scale (HoNOS). Patients admitted on night shifts, weekends, and holidays showed a shorter length of stay; patients compulsorily admitted during daytime (disregarding the day of the week) had a longer length of stay. All patient groups achieved a robust clinical improvement (i.e., an HoNOS score reduction of around 50%), with similar readmission rates. DISCUSSION The main finding of our study is the relationship between "daytime hours" and fewer compulsory admissions, a result of the interplay between demographics, clinical characteristics, and out-of-clinic service availability (such as ambulatory psychiatric- psychological praxis; day-clinic; home-treatment). The differing clinical profile, in turn, determines differences in treatment selection, with patients admitted after office hours experiencing a higher rate of coercive measures. The shorter length of stay for out-of-office admissions might result from the hospitalization as an intervention. These results should encourage the implementation of outpatient crisis-intervention services, available from dusk till dawn.
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Affiliation(s)
- Marius Knorr
- Department of Psychiatry, Psychotherapy, and Psychosomatics, Psychiatric University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Andreas B Hofmann
- Department of Psychiatry, Psychotherapy, and Psychosomatics, Psychiatric University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Dimitrina Miteva
- Department of Psychiatry, Psychotherapy, and Psychosomatics, Psychiatric University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Vanessa Noboa
- Department of Psychiatry, Psychotherapy, and Psychosomatics, Psychiatric University Hospital of Zurich, University of Zurich, Zurich, Switzerland.,Faculty of Medicine, University San Francisco de Quito, Quito, Ecuador
| | - Katrin Rauen
- Department of Geriatric Psychiatry, Psychiatric University Hospital of Zurich, University of Zurich, Zurich, Switzerland.,Institute for Stroke and Dementia Research, Laboratory of Experimental Stroke Research, Ludwig Maximilian University of Munich, Munich, Germany
| | - Fritz Frauenfelder
- Department of Psychiatry, Psychotherapy, and Psychosomatics, Psychiatric University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Erich Seifritz
- Department of Psychiatry, Psychotherapy, and Psychosomatics, Psychiatric University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Boris B Quednow
- Department of Psychiatry, Psychotherapy, and Psychosomatics, Psychiatric University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Stefan Vetter
- Department of Psychiatry, Psychotherapy, and Psychosomatics, Psychiatric University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Stephan T Egger
- Department of Psychiatry, Psychotherapy, and Psychosomatics, Psychiatric University Hospital of Zurich, University of Zurich, Zurich, Switzerland.,Faculty of Medicine, Department of Psychiatry, University of Oviedo, Oviedo, Spain
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4
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Egger ST, Knorr M, Bobes J, Bernstein A, Seifritz E, Vetter S. Real-Time Assessment of Stress and Stress Response Using Digital Phenotyping: A Study Protocol. Front Digit Health 2021; 2:544418. [PMID: 34713030 PMCID: PMC8521792 DOI: 10.3389/fdgth.2020.544418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 03/20/2020] [Accepted: 08/26/2020] [Indexed: 11/13/2022] Open
Abstract
Background: Stress is a complex phenomenon that may have a negative influence on health and well-being; consequently, it plays a pivotal role in mental health. Although the incidence of mental disorders has been continuously rising, development of prevention and treatment methods has been rather slow. Through the ubiquitous presence of smartphones and wearable devices, people can monitor stress parameters in everyday life. However, the reliability and validity of such monitoring are still unsatisfactory. Methods: The aim of this trial is to find a relationship between psychological stress and saliva cortisol levels on the one hand and physiological parameters measured by smartphones in combination with a commercially available wearable device on the other. Participants include cohorts of individuals with and without a psychiatric disorder. The study is conducted in two settings: one naturalistic and one a controlled laboratory environment, combining ecological momentary assessment (EMA) and digital phenotyping (DP). EMA is used for the assessment of challenging and stressful situations coincidentally happening during a whole observation week. DP is used during a controlled stress situation with the Trier Social Stress Test (TSST) as a standardized psychobiological paradigm. Initially, participants undergo a complete psychological screening and profiling using a standardized psychometric test battery. EMA uses a smartphone application, and the participants keep a diary about their daily routine, activities, well-being, sleep, and difficult and stressful situations they may encounter. DP is conducted through wearable devices able to continuously monitor physiological parameters (i.e., heart rate, heart rate variability, skin conductivity, temperature, movement and acceleration). Additionally, saliva cortisol samples are repeatedly taken. The TSST is conducted with continuous measurement of the same parameters measured during the EMA. Discussion: We aim to identify valid and reliable digital biomarkers for stress and stress reactions. Furthermore, we expect to find a way of early detection of psychological stress in order to evolve new opportunities for interventions reducing stress. That may allow us to find new ways of treating and preventing mental disorders. Trial Registration: The competing ethics committee of the Canton of Zurich, Switzerland, approved the study protocol V05.1 May 28, 2019 [BASEC: 2019-00814]; the trial was registered at ClinicalTrials.gov [NCT04100213] on September 19, 2019.
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Affiliation(s)
- Stephan T Egger
- Department of Psychiatry, Psychotherapy and Psychosomatics, Faculty of Medicine, Psychiatric University Hospital of Zurich, University of Zurich, Zurich, Switzerland.,Department of Psychiatry, Faculty of Medicine, University of Oviedo, CIBERSAM, Oviedo, Spain
| | - Marius Knorr
- Department of Psychiatry, Psychotherapy and Psychosomatics, Faculty of Medicine, Psychiatric University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Julio Bobes
- Department of Psychiatry, Faculty of Medicine, University of Oviedo, CIBERSAM, Oviedo, Spain
| | - Abraham Bernstein
- Department of Informatics, University of Zurich, Zurich, Switzerland
| | - Erich Seifritz
- Department of Psychiatry, Psychotherapy and Psychosomatics, Faculty of Medicine, Psychiatric University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Stefan Vetter
- Department of Psychiatry, Psychotherapy and Psychosomatics, Faculty of Medicine, Psychiatric University Hospital of Zurich, University of Zurich, Zurich, Switzerland
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Abstract
The success of glaucoma filtration surgery depends mainly on an incomplete wound healing process in the area of the fistula. Since Kornblueth and Tenenbaum's investigations in 1956 it has been known that aqueous humour has intrinsic antiproliferative properties. It is assumed that ascorbic acid is involved in the regulation of the wound healing process after filtration surgery. To evaluate the antiproliferative effect of ascorbic acid in vitro, we used cultured fibroblasts of bovine Tenon's capsule and bovine sclera. Incubation of these cells with ascorbic acid at concentrations ranging from 0.5 to 3 mM/L led to dose-dependent inhibition of cell proliferation. The half-maximal inhibitory concentration was 1.0 mM/L for both cell types. Physiological concentrations of ascorbic acid may be valuable in the pharmacological prevention of failure of glaucoma filtration surgery. However, extensive clinical investigations are needed to clarify whether topical intraoperative or postoperative as well as oral administration of ascorbic acid inhibits fibroblast proliferation after glaucoma filtration surgery.
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Affiliation(s)
- P O Denk
- Department of Ophthalmology, University of Tübingen, Germany
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Andre E, Yaniz-Galende E, Hamilton C, Dusting GJ, Hellen N, Poulet CE, Diez Cunado M, Smits AM, Lowe V, Eckardt D, Du Pre B, Sanz Ruiz R, Moerkamp AT, Tribulova N, Smani T, Liskova YV, Greco S, Guzzolino E, Franco D, Lozano-Velasco E, Knorr M, Pavoine C, Bukowska A, Van Linthout S, Miteva K, Sulzgruber P, Latet SC, Portnychenko A, Cannavo A, Kamilova U, Sagach VF, Santin Y, Octavia Y, Haller PM, Octavia Y, Rubies C, Dei Zotti F, Wong KHK, Gonzalez Miqueo A, Kruithof BPT, Kadur Nagaraju C, Shaposhnikova Y, Songia P, Lindner D, Wilson C, Benzoni P, Fabbri A, Campostrini G, Jorge E, Casini S, Mengarelli I, Nikolov A, Bublikov DS, Kheloufi M, Rubies C, Walker RE, Van Dijk RA, Posthuma JJ, Dumitriu IE, Karshovska E, Sakic A, Alexandru N, Martin-Lorenzo M, Molica F, Taylor RF, Mcarthur L, Crocini C, Matsuyama TA, Mazzoni L, Lin WK, Owen TJ, Scigliano M, Sheehan A, Bezerra Gurgel AR, Bromage DI, Kiss A, Ikeda G, Pickard JMJ, Wirth G, Casos K, Khudiakov A, Nistal JF, Ferrantini C, Park SJ, Di Maggio S, Gentile F, Dini L, Buyandelger B, Larrasa-Alonso J, Schirmer I, Chin SH, Cimiotti D, Martini H, Hohensinner PJ, Garabito M, Zeni F, Licholai S, De Bortoli M, Sivitskaya L, Viczenczova C, Rainer PP, Smith LE, Suna G, Gambardella J, Cozma A, De Gonzalo Calvo D, Scoditti E, Clark BJ, Mansfield C, Eckardt D, Gomez L, Llucia-Valldeperas A, De Pauw A, Porporato P, Bouzin C, Draoui N, Sonveaux P, Balligand JL, Mougenot N, Formicola L, Nadaud S, Dierick F, Hajjar RJ, Marazzi G, Sassoon D, Hulot JS, Zamora VR, Burton FL, Macquaide N, Smith GL, Hernandez D, Sivakumaran P, Millard R, Wong RCB, Pebay A, Shepherd RK, Lim SY, Owen T, Jabbour RJ, Kloc M, Kodagoda T, Denning C, Harding SE, Ramos S, Terracciano C, Gorelik J, Wei K, Bushway P, Ruiz-Lozano P, Mercola M, Moerkamp AT, Vegh AMD, Dronkers E, Lodder K, Van Herwaarden T, Goumans MJ, Pellet-Many C, Zachary I, Noack K, Bosio A, Feyen DAM, Demkes EJ, Dierickx PJ, Doevendans PA, Vos MA, Van Veen AAB, Van Laake LW, Fernandez Santos ME, Suarez Sancho S, Fuentes Arroyo L, Plasencia Martin V, Velasco Sevillano P, Casado Plasencia A, Climent AM, Guillem M, Atienza Fernandez F, Fernandez-Aviles F, Dingenouts CKE, Lodder K, Kruithof BPT, Van Herwaarden T, Vegh AMD, Goumans MJ, Smits AM, Knezl V, Szeiffova Bacova B, Egan Benova T, Viczenczova C, Goncalvesova E, Slezak J, Calderon-Sanchez E, Diaz I, Ordonez A, Salikova SP, Zaccagnini G, Voellenkle C, Sadeghi I, Maimone B, Castelvecchio S, Gaetano C, Menicanti L, Martelli F, Hatcher C, D'aurizio R, Groth M, Baugmart M, Mercatanti A, Russo F, Mariani L, Magliaro C, Pitto L, Lozano-Velasco E, Jodar-Garcia A, Galiano-Torres J, Lopez-Navarrete I, Aranega A, Wagensteen R, Quesada A, Aranega A, Franco D, Finger S, Karbach S, Kossmann S, Muenzel T, Wenzel P, Keck M, Mougenot N, Favier S, Fuand A, Atassi F, Barbier C, Lompre AM, Hulot JS, Nikonova Y, Pluteanu F, Kockskaemper J, Chilukoti RK, Wolke C, Lendeckel U, Gardemann A, Goette A, Miteva K, Pappritz K, Mueller I, El-Shafeey M, Ringe J, Tschoepe C, Pappritz K, El-Shafeey M, Ringe J, Tschoepe C, Van Linthout S, Koller L, Richter B, Blum S, Koprak M, Huelsmann M, Pacher R, Goliasch G, Wojta J, Niessner A, Van Herck PL, Claeys MJ, Haine SE, Lenders GD, Miljoen HP, Segers VF, Vandendriescche TR, Hoymans VY, Vrints CJ, Lapikova-Bryhinska T, Gurianova V, Portnichenko H, Vasylenko M, Zapara Y, Portnichenko V, Liccardo D, Lymperopoulos A, Santangelo M, Leosco D, Koch WJ, Ferrara N, Rengo G, Alieva T, Rasulova Z, Masharipova D, Dorofeyeva NA, Drachuk KO, Sicard P, Yucel Y, Dutaur M, Vindis C, Parini A, Mialet-Perez J, Van Deel ED, De Boer M, De Waard MC, Duncker DJ, Nagel F, Inci M, Santer D, Hallstroem S, Podesser BK, Kararigas G, De Boer M, Kietadisorn R, Swinnen M, Duimel H, Verheyen F, Chrifi I, Brandt MM, Cheng C, Janssens S, Moens AL, Duncker DJ, Batlle M, Dantas AP, Sanz M, Sitges M, Mont L, Guasch E, Lobysheva I, Beauloye C, Balligand JL, Vanhoutte PM, Tang EHC, Beaumont J, Lopez B, Ravassa S, Hermida N, Valencia F, Gomez-Doblas JJ, San Jose G, De Teresa E, Diez J, Van De Merbel AF, Kruithof-De Julio M, Goumans MJ, Claus P, Dries E, Angelo Singh A, Vermeulen K, Roderick HL, Sipido KR, Driesen RB, Ilchenko I, Bobronnikova L, Myasoedova V, Alamanni F, Tremoli E, Poggio P, Becher PM, Gotzhein F, Klingel K, Blankenberg S, Westermann D, Zi M, Cartwright E, Campostrini G, Bonzanni M, Milanesi R, Bucchi A, Baruscotti M, Difrancesco D, Barbuti A, Fantini M, Wilders R, Severi S, Benzoni P, Dell' Era P, Serzanti M, Olesen MS, Muneretto C, Bisleri G, Difrancesco D, Baruscotti M, Bucchi A, Barbuti A, Amoros-Figueras G, Raga S, Campos B, Alonso-Martin C, Rodriguez-Font E, Vinolas X, Cinca J, Guerra JM, Mengarelli I, Schumacher CA, Veldkamp MW, Verkerk AO, Remme CA, Veerman C, Guan K, Stauske M, Tan H, Barc J, Wilde A, Verkerk A, Bezzina C, Tsinlikov I, Tsinlikova I, Nicoloff G, Blazhev A, Garev A, Andrienko AV, Lychev VG, Vorobova EN, Anchugina DA, Vion AC, Hammoutene A, Poisson J, Dupont N, Souyri M, Tedgui A, Codogno P, Boulanger CM, Rautou PE, Dantas AP, Batlle M, Guasch E, Torres M, Montserrat JM, Almendros I, Mont L, Austin CA, Holt CM, Rijs K, Wezel A, Hamming JF, Kolodgie FD, Virmani R, Schaapherder AF, Lindeman JHN, Posma JJN, Van Oerle R, Spronk HMH, Ten Cate H, Dinkla S, Kaski JC, Schober A, Chaabane C, Ambartsumian N, Grigorian M, Bochaton-Piallat ML, Dragan E, Andrei E, Niculescu L, Georgescu A, Gonzalez-Calero L, Maroto AS, Martinez PJ, Heredero A, Aldamiz-Echevarria G, Vivanco F, Alvarez-Llamas G, Meens MJ, Pelli G, Foglia B, Scemes E, Kwak BR, Caldwell JL, Eisner DA, Dibb KM, Trafford AW, Chilton L, Smith GL, Nicklin SA, Coppini R, Ferrantini C, Yan P, Loew LM, Poggesi C, Cerbai E, Pavone FS, Sacconi L, Tanaka H, Ishibashi-Ueda H, Takamatsu T, Coppini R, Ferrantini C, Gentile F, Pioner JM, Santini L, Sartiani L, Bargelli V, Poggesi C, Mugelli A, Cerbai E, Maciejewska M, Bolton EL, Wang Y, O'brien F, Ruas M, Lei M, Sitsapesan R, Galione A, Terrar DA, Smith JG, Garcia D, Barriales-Villa R, Monserrat L, Harding SE, Denning C, Marston SB, Watson S, Tkach S, Faggian G, Terracciano CM, Perbellini F, Eiros Zamora J, Papadaki M, Messer A, Marston S, Gould I, Johnston A, Dunne M, Smith G, Kemi OJ, Pillai M, Davidson SM, Yellon DM, Tratsiakovich Y, Jang J, Gonon AT, Pernow J, Matoba T, Koga J, Egashira K, Burke N, Davidson SM, Yellon DM, Korpisalo P, Hakkarainen H, Laidinen S, Yla-Herttuala S, Ferrer-Curriu G, Perez M, Permanyer E, Blasco-Lucas A, Gracia JM, Castro MA, Barquinero J, Galinanes M, Kostina D, Kostareva A, Malashicheva A, Merino D, Ruiz L, Gomez J, Juarez C, Gil A, Garcia R, Hurle MA, Coppini R, Pioner JM, Gentile F, Mazzoni L, Rossi A, Tesi C, Belardinelli L, Olivotto I, Cerbai E, Mugelli A, Poggesi C, Eun-Ji EJ, Lim BK, Choi DJ, Milano G, Bertolotti M, De Marchis F, Zollo F, Sommariva E, Capogrossi MC, Pompilio G, Bianchi ME, Raucci A, Pioner JM, Coppini R, Scellini B, Tardiff J, Tesi C, Poggesi C, Ferrantini C, Mazzoni L, Sartiani L, Coppini R, Diolaiuti L, Ferrari P, Cerbai E, Mugelli A, Mansfield C, Luther P, Knoell R, Villalba M, Sanchez-Cabo F, Lopez-Olaneta MM, Ortiz-Sanchez P, Garcia-Pavia P, Lara-Pezzi E, Klauke B, Gerdes D, Schulz U, Gummert J, Milting H, Wake E, Kocsis-Fodor G, Brack KE, Ng GA, Kostareva A, Smolina N, Majchrzak M, Moehner D, Wies A, Milting H, Stehle R, Pfitzer G, Muegge A, Jaquet K, Maggiorani D, Lefevre L, Dutaur M, Mialet-Perez J, Parini A, Cussac D, Douin-Echinard V, Ebenbauer B, Kaun C, Prager M, Wojta J, Rega-Kaun G, Costa G, Onetti Y, Jimenez-Altayo F, Vila E, Dantas AP, Milano G, Bertolotti M, Scopece A, Piacentini L, Bianchi ME, Capogrossi MC, Pompilio G, Colombo G, Raucci A, Blaz M, Kapelak B, Sanak M, Bauce B, Calore C, Lorenzon A, Calore M, Poloni G, Mazzotti E, Rigato I, Daliento L, Basso C, Thiene G, Melacini P, Corrado D, Rampazzo A, Danilenko NG, Vaikhanskaya TG, Davydenko OG, Szeiffova Bacova B, Kura B, Egan Benova T, Yin CH, Kukreja R, Slezak J, Tribulova N, Lee DI, Sorge M, Glabe C, Paolocci N, Guarnieri C, Tomaselli GF, Kass DA, Van Eyk JE, Agnetti G, Cordwell SJ, White MY, Wojakowski W, Lynch M, Barallobre-Barreiro J, Yin X, Mayr U, White S, Jahingiri M, Hill J, Mayr M, Sorriento D, Ciccarelli M, Fiordelisi A, Campiglia P, Trimarco B, Iaccarino G, Sitar Taut AV, Schiau S, Orasan O, Halloumi W, Negrean V, Zdrenghea D, Pop D, Van Der Meer RW, Rijzewijk LJ, Smit JWA, Revuelta-Lopez E, Nasarre L, Escola-Gil JC, Lamb HJ, Llorente-Cortes V, Pellegrino M, Massaro M, Carluccio MA, Calabriso N, Wabitsch M, Storelli C, De Caterina R, Church SJ, Callagy S, Begley P, Kureishy N, Mcharg S, Bishop PN, Unwin RD, Cooper GJS, Mawad D, Perbellini F, Tonkin J, Bello SO, Simonotto JD, Lyon AR, Stevens MM, Terracciano CM, Harding SE, Kernbach M, Czichowski V, Bosio A, Fuentes L, Hernandez-Redondo I, Guillem MS, Fernandez ME, Sanz R, Atienza F, Climent AM, Fernandez-Aviles F, Soler-Botija C, Prat-Vidal C, Galvez-Monton C, Roura S, Perea-Gil I, Bragos R, Bayes-Genis A. Poster session 1Cell growth, differentiation and stem cells - Heart72Understanding the metabolism of cardiac progenitor cells: a first step towards controlling their proliferation and differentiation?73Expression of pw1/peg3 identifies a new cardiac adult stem cell population involved in post-myocardial infarction remodeling74Long-term stimulation of iPS-derived cardiomyocytes using optogenetic techniques to promote phenotypic changes in E-C coupling75Benefits of electrical stimulation on differentiation and maturation of cardiomyocytes from human induced pluripotent stem cells76Constitutive beta-adrenoceptor-mediated cAMP production controls spontaneous automaticity of human induced pluripotent stem cell-derived cardiomyocytes77Formation and stability of T-tubules in cardiomyocytes78Identification of miRNAs promoting human cardiomyocyte proliferation by regulating Hippo pathway79A direct comparison of foetal to adult epicardial cell activation reveals distinct differences relevant for the post-injury response80Role of neuropilins in zebrafish heart regeneration81Highly efficient immunomagnetic purification of cardiomyocytes derived from human pluripotent stem cells82Cardiac progenitor cells posses a molecular circadian clock and display large 24-hour oscillations in proliferation and stress tolerance83Influence of sirolimus and everolimus on bone marrow-derived mesenchymal stem cell biology84Endoglin is important for epicardial behaviour following cardiac injuryCell death and apoptosis - Heart87Ultrastructural alterations reflecting Ca2+ handling and cell-to-cell coupling disorders precede occurrence of severe arrhythmias in intact animal heart88Urocortin-1 promotes cardioprotection through ERK1/2 and EPAC pathways: role in apoptosis and necrosis89Expression p38 MAPK and Cas-3 in myocardium LV of rats with experimental heart failure at melatonin and enalapril introductionTranscriptional control and RNA species - Heart92Accumulation of beta-amyloid 1-40 in HF patients: the role of lncRNA BACE1-AS93Role of miR-182 in zebrafish and mouse models of Holt-Oram syndrome94Mir-27 distinctly regulates muscle-enriched transcription factors and growth factors in cardiac and skeletal muscle cells95AF risk factors impair PITX2 expression leading to Wnt-microRNA-ion channel remodelingCytokines and cellular inflammation - Heart98Post-infarct survival depends on the interplay of monocytes, neutrophils and interferon gamma in a mouse model of myocardial Infarction99Inflammatory cd11b/c cells play a protective role in compensated cardiac hypertrophy by promoting an orai3-related pro-survival signal100Anti-inflammatory effects of endothelin receptor blockade in the atrial tissue of spontaneously hypertensive rats101Mesenchymal stromal cells reduce NLRP3 inflammasome activity in Coxsackievirus B3-induced myocarditis102Mesenchymal stromal cells modulate monocytes trafficking in Coxsackievirus B3-induced myocarditis103The impact of regulatory T lymphocytes on long-term mortality in patients with chronic heart failure104Temporal dynamics of dendritic cells after ST-elevation myocardial infarction relate with improvement of myocardial functionGrowth factors and neurohormones - Heart107Preconditioning of hypertrophied heart: miR-1 and IGF-1 crosstalk108Modulation of catecholamine secretion from human adrenal chromaffin cells by manipulation of G protein-coupled receptor kinase-2 activity109Evaluation of cyclic adenosin-3,5- monophosphate and neurohormones in patients with chronic heart failureNitric oxide and reactive oxygen species - Heart112Hydrogen sulfide donor inhibits oxidative and nitrosative stress, cardiohemodynamics disturbances and restores cNOS coupling in old rats113Role and mechanisms of action of aldehydes produced by monoamine oxidase A in cardiomyocyte death and heart failure114Exercise training has contrasting effects in myocardial infarction and pressure-overload due to different endothelial nitric oxide synthase regulation115S-Nitroso Human Serum Albumin dose-dependently leads to vasodilation and alters reactive hyperaemia in coronary arteries of an isolated mouse heart model116Modulating endothelial nitric oxide synthase with folic acid attenuates doxorubicin-induced cardiomyopathy119Effects of long-term very high intensity exercise on aortic structure and function in an animal model120Electron paramagnetic resonance spectroscopy quantification of nitrosylated hemoglobin (HbNO) as an index of vascular nitric oxide bioavailability in vivo121Deletion of repressor activator protein 1 impairs acetylcholine-induced relaxation due to production of reactive oxygen speciesExtracellular matrix and fibrosis - Heart124MicroRNA-19b is associated with myocardial collagen cross-linking in patients with severe aortic stenosis. Potential usefulness as a circulating biomarker125A new ex vivo model to study cardiac fibrosis126Heterogeneity of fibrosis and fibroblast differentiation in the left ventricle after myocardial infarction127Effect of carbohydrate metabolism degree compensation to the level of galectin-3 changes in hypertensive patients with chronic heart failure and type 2 diabetes mellitus128Statin paradox in association with calcification of bicuspid aortic valve interstitial cells129Cardiac function remains impaired despite reversible cardiac fibrosis after healed experimental viral myocarditisIon channels, ion exchangers and cellular electrophysiology - Heart132Identifying a novel role for PMCA1 (Atp2b1) in heart rhythm instability133Mutations of the caveolin-3 gene as a predisposing factor for cardiac arrhythmias134The human sinoatrial node action potential: time for a computational model135iPSC-derived cardiomyocytes as a model to dissect ion current alterations of genetic atrial fibrillation136Postextrasystolic potentiation in healthy and diseased hearts: effects of the site of origin and coupling interval of the preceding extrasystole137Absence of Nav1.8-based (late) sodium current in rabbit cardiomyocytes and human iPSC-CMs138hiPSC-derived cardiomyocytes from Brugada Syndrome patients without identified mutations do not exhibit cellular electrophysiological abnormalitiesMicrocirculation141Atherogenic indices, collagen type IV turnover and the development of microvascular complications- study in diabetics with arterial hypertension142Changes in the microvasculature and blood viscosity in women with rheumatoid arthritis, hypercholesterolemia and hypertensionAtherosclerosis145Shear stress regulates endothelial autophagy: consequences on endothelial senescence and atherogenesis146Obstructive sleep apnea causes aortic remodeling in a chronic murine model147Aortic perivascular adipose tissue displays an aged phenotype in early and late atherosclerosis in ApoE-/- mice148A systematic evaluation of the cellular innate immune response during the process of human atherosclerosis149Inhibition of Coagulation factor Xa increases plaque stability and attenuates the onset and progression of atherosclerotic plaque in apolipoprotein e-deficient mice150Regulatory CD4+ T cells from patients with atherosclerosis display pro-inflammatory skewing and enhanced suppression function151Hypoxia-inducible factor (HIF)-1alpha regulates macrophage energy metabolism by mediating miRNAs152Extracellular S100A4 is a key player of smooth muscle cell phenotypic transition: implications in atherosclerosis153Microparticles of healthy origins improve atherosclerosis-associated endothelial progenitor cell dysfunction via microRNA transfer154Arterial remodeling and metabolism impairment in early atherosclerosis155Role of pannexin1 in atherosclerotic plaque formationCalcium fluxes and excitation-contraction coupling158Amphiphysin II induces tubule formation in cardiac cells159Interleukin 1 beta regulation of connexin 43 in cardiac fibroblasts and the effects of adult cardiac myocyte:fibroblast co-culture on myocyte contraction160T-tubular electrical defects contribute to blunted beta-adrenergic response in heart failure161Beat-to-beat variability of intracellular Ca2+ dynamics of Purkinje cells in the infarct border zone of the mouse heart revealed by rapid-scanning confocal microscopy162The efficacy of late sodium current blockers in hypertrophic cardiomyopathy is dependent on genotype: a study on transgenic mouse models with different mutations163Synthesis of cADPR and NAADP by intracellular CD38 in heart: role in inotropic and arrhythmogenic effects of beta-adrenoceptor signalingContractile apparatus166Towards an engineered heart tissue model of HCM using hiPSC expressing the ACTC E99K mutation167Diastolic mechanical load delays structural and functional deterioration of ultrathin adult heart slices in culture168Structural investigation of the cardiac troponin complex by molecular dynamics169Exercise training restores myocardial and oxidative skeletal muscle function from myocardial infarction heart failure ratsOxygen sensing, ischaemia and reperfusion172A novel antibody specific to full-length stromal derived factor-1 alpha reveals that remote conditioning induces its cleavage by endothelial dipeptidyl peptidase 4173Attenuation of myocardial and vascular arginase activity by vagal nerve stimulation via a mechanism involving alpha-7 nicotinic receptor during cardiac ischemia and reperfusion174Novel nanoparticle-mediated medicine for myocardial ischemia-reperfusion injury simultaneously targeting mitochondrial injury and myocardial inflammation175Acetylcholine plays a key role in myocardial ischaemic preconditioning via recruitment of intrinsic cardiac ganglia176The role of nitric oxide and VEGFR-2 signaling in post ischemic revascularization and muscle recovery in aged hypercholesterolemic mice177Efficacy of ischemic preconditioning to protect the human myocardium: the role of clinical conditions and treatmentsCardiomyopathies and fibrosis180Plakophilin-2 haploinsufficiency leads to impaired canonical Wnt signaling in ARVC patient181Improved technique for customized, easier, safer and more reliable transverse aortic arch banding and debanding in mice as a model of pressure overload hypertrophy182Late sodium current inhibitors for the treatment of inducible obstruction and diastolic dysfunction in hypertrophic cardiomyopathy: a study on human myocardium183Angiotensin II receptor antagonist fimasartan has protective role of left ventricular fibrosis and remodeling in the rat ischemic heart184Role of High-Mobility Group Box 1 (HMGB1) redox state on cardiac fibroblasts activities and heart function after myocardial infarction185Atrial remodeling in hypertrophic cardiomyopathy: insights from mouse models carrying different mutations in cTnT186Electrophysiological abnormalities in ventricular cardiomyocytes from a Maine Coon cat with hypertrophic cardiomyopathy: effects of ranolazine187ZBTB17 is a novel cardiomyopathy candidate gene and regulates autophagy in the heart188Inhibition of SRSF4 in cardiomyocytes induces left ventricular hypertrophy189Molecular characterization of a novel cardiomyopathy related desmin frame shift mutation190Autonomic characterisation of electro-mechanical remodeling in an in-vitro leporine model of heart failure191Modulation of Ca2+-regulatory function by three novel mutations in TNNI3 associated with severe infant restrictive cardiomyopathyAging194The aging impact on cardiac mesenchymal like stromal cells (S+P+)195Reversal of premature aging markers after bariatric surgery196Sex-associated differences in vascular remodeling during aging: role of renin-angiotensin system197Role of the receptor for advanced glycation end-products (RAGE) in age dependent left ventricle dysfunctionsGenetics and epigenetics200hsa-miR-21-5p as a key factor in aortic remodeling during aneurysm formation201Co-inheritance of mutations associated with arrhythmogenic and hypertrophic cardiomyopathy in two Italian families202Lamin a/c hot spot codon 190: form various amino acid substitutions to clinical effects203Treatment with aspirin and atorvastatin attenuate cardiac injury induced by rat chest irradiation: Implication of myocardial miR-1, miR-21, connexin-43 and PKCGenomics, proteomics, metabolomics, lipidomics and glycomics206Differential phosphorylation of desmin at serines 27 and 31 drives the accumulation of preamyloid oligomers in heart failure207Potential role of kinase Akt2 in the reduced recovery of type 2 diabetic hearts subjected to ischemia / reperfusion injury208A proteomics comparison of extracellular matrix remodelling in porcine coronary arteries upon stent implantationMetabolism, diabetes mellitus and obesity211Targeting grk2 as therapeutic strategy for cancer associated to diabetes212Effects of salbutamol on large arterial stiffness in patients with metabolic syndrome213Circulating microRNA-1 and microRNA-133a: potential biomarkers of myocardial steatosis in type 2 diabetes mellitus214Anti-inflammatory nutrigenomic effects of hydroxytyrosol in human adipocytes - protective mechanisms of mediterranean diets in obesity-related inflammation215Alterations in the metal content of different cardiac regions within a rat model of diabetic cardiomyopathyTissue engineering218A novel conductive patch for application in cardiac tissue engineering219Establishment of a simplified and improved workflow from neonatal heart dissociation to cardiomyocyte purification and characterization220Effects of flexible substrate on cardiomyocytes cell culture221Mechanical stretching on cardiac adipose progenitors upregulates sarcomere-related genes. Cardiovasc Res 2016. [DOI: 10.1093/cvr/cvw135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Knorr M, Bienemann K, Walde G, Kaufhold A, Schündeln M. A Massive Intestinal Vaso-occlusive Crisis or “Girdle Syndrome” in a 6-year-old Boy Observed as a First Manifestation of Sickle Cell Disease. Klin Padiatr 2014; 226:372-4. [DOI: 10.1055/s-0034-1389907] [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] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- M. Knorr
- Pediatric Hematology/Oncology, Universitätsklinikum Essen, Essen, Germany
| | - K. Bienemann
- Department of General Pediatrics, Elisabeth-Krankenhaus Essen, Essen, Germany
| | - G. Walde
- Pediatric Hematology/Oncology, Universitätsklinikum Essen, Essen, Germany
| | - A. Kaufhold
- Pediatric Hematology/Oncology, Universitätsklinikum Essen, Essen, Germany
| | - M. Schündeln
- Pediatric Hematology/Oncology, Universitätsklinikum Essen, Essen, Germany
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Kubicki MM, Rousselin Y, Knorr M, Guyon F. New copper(I) polymers assembled by dithioether ligands. Acta Crystallogr A 2011. [DOI: 10.1107/s010876731108442x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Hohls M, Siebke A, Gokel M, Knorr M, Streuter M, Haas V. [Solitary synchronous intraocular metastasis of a peripheral non-small cell lung cancer : A multidisciplinary approach with curative intention]. Ophthalmologe 2009; 107:549-52. [PMID: 20024563 DOI: 10.1007/s00347-009-2080-4] [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: 11/30/2022]
Abstract
A solitary synchronous distant metastasis of newly diagnosed non-small cell lung cancer (NSCLC) occurs in only a small number of patients. The available literature suggests a significant rise in long-term survival for these patients when resection of the bronchial carcinoma and the metastasis are feasible and performed. To demonstrate a multidisciplinary concept, we present the case of a patient with a peripheral NSCLC and a solitary synchronous intraocular metastasis. To our knowledge, this concept with curative intention has not been published before regarding a patient with an intraocular metastasis.
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Affiliation(s)
- M Hohls
- Lungenzentrum, Abteilung für Thoraxchirurgie, HELIOS Klinikum Krefeld, Deutschland.
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Denk PO, Markovic M, Knorr M. [Correlation between glaucomatous hemifield scotomas and measurements of nerve fiber layer thickness using scanning laser polarimetry]. Ophthalmologe 2005; 102:957-67. [PMID: 15871023 DOI: 10.1007/s00347-005-1211-9] [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: 10/25/2022]
Abstract
BACKGROUND The purpose of the present study was to investigate wether a reduction of the retinal nerve fiber layer (RNFL) in patients with hemifield scotoma can be measured with scanning laser polarimetry and wether regional RNFL parameters can be correlated with the corresponding visual field indices. PATIENTS AND METHODS We included one eye from each of 40 normal subjects and one eye from each of 40 glaucoma patients. Automated perimetry was performed and the RNFL was analyzed. RESULTS HMD values obtained by white-white (W/W) and blue-yellow (B/Y) perimetry failed to correlate significantly with most of the corresponding RNFL parameters obtained with the GDx. Significant correlations were only shown for the inferior HMD (W/W and B/Y) and the superior ratio, superior average, and deviation superior. Furthermore, we found a high correlation between differences of upper and lower GDx parameters and differences of upper and lower visual field indices of W/W and B/Y perimetry. CONCLUSIONS Scanning laser polarimetry can detect differences in RNFL sectors in patients with functional hemifield differences and carries the potential to detect changes in RNFL thickness at an early stage.
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Affiliation(s)
- P O Denk
- Servicio de Oftalmologia, Clinica Alemana, Vitacura, Santiago, Chile.
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Schubert U, Knorr M. Transition-metal silyl complexes. 29. Formation of dihydride complexes from hydrido(silyl)tetracarbonyliron derivatives. Inorg Chem 2002. [DOI: 10.1021/ic00308a035] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
BACKGROUND The function of platelet-derived growth factor (PDGF) during corneal wound healing is only incompletely understood to date. Previous studies have shown that the mRNA of PDGF receptor type alpha (PDGFR alpha) and type beta (PDGFR beta) is expressed in cultured corneal epithelial cells (CEP). To add to the current knowledge, the following study was designed to compare the expression of mRNA and protein of both PDGF receptor subtypes in cultured CEPs and in CEPs ex vivo. METHODS Total RNA and protein were extracted from cultured CEPs and from CEPs ex vivo according to standard protocols. The reverse-transcription polymerase chain reaction (RT-PCR) was applied to detect specific expression of the mRNA of PDGFR alpha and PDGFRss. The expression of the corresponding proteins was detected using Western blotting. RESULTS MRNA and protein of both PDGF receptor subtypes could be detected in cultured CEPs but not in CEPs ex vivo. CONCLUSION The present study shows for the first time that mRNA and protein of both PDGF receptor subtypes are expressed in cultured human corneal epithelial cells, while corneal epithelial cells ex vivo do not express these receptors. The differential up-regulation of PDGF receptors in activated cells during wound healing could be of pathophysiological importance.
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Affiliation(s)
- P O Denk
- Universitätsaugenklinik Tübingen, Abteilung I, Schleichstrasse 12, 72076 Tübingen
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Schiefer U, Malsam A, Flad M, Stumpp F, Dietrich TJ, Paetzold J, Vonthein R, Knorr M, Denk PO. Evaluation of glaucomatous visual field loss with locally condensed grids using fundus-oriented perimetry (FOP). Eur J Ophthalmol 2001; 11 Suppl 2:S57-62. [PMID: 11592532 DOI: 10.1177/112067210101102s07] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [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: 11/17/2022]
Abstract
PURPOSE We compared detection rates of glaucomatous visual field defects (VFDs) between a conventional rectangular stimulus grid and locally condensed test point arrangements in morphologically suspicious regions. METHODS Humphrey Field Analyzer model 630 (HFA I, program 30-2 with a rectangular 6 degrees x 6 degrees grid) was used as the conventional perimetric method. Individual local test-point condensation was realized by fundus-oriented perimetry (FOP) on the Tuebingen Computer Campimeter (TCC). RESULTS Of a total of 66 glaucoma patients, or suspected sufferers, 23 showed normal findings and 27 showed pathological findings with both methods. In 15 cases we found normal visual fields in HFA 30-2, whereas FOP revealed early glaucomatous functional damage. Only one case showed pathological HFA results, while FOP was normal. Detection rates of VFDs significantly differed between the two methods (p < 0.001; sign test). CONCLUSIONS FOP, using individually condensed test grids, significantly increases detection rates of glaucomatous VFDs in morphologically suspicuous areas compared with a conventional HFA 30-2 technique using equidistant rectangular (6 degrees x 6 degrees) test point arrangements.
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Affiliation(s)
- U Schiefer
- University Eye Hospital Tübingen, Dept. II, Germany.
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Verin P, Easty DL, Secchi A, Ciprandi G, Partouche P, Nemeth-Wasmer G, Brancato R, Harrisberg CJ, Estivin-Ebrardt C, Coster DJ, Apel AJ, Coroneo MT, Knorr M, Carmichael TR, Kent-Smith BT, Abrantes P, Leonardi A, Cerqueti PM, Modorati G, Martinez M. Clinical evaluation of twice-daily emedastine 0.05% eye drops (Emadine eye drops) versus levocabastine 0.05% eye drops in patients with allergic conjunctivitis. Am J Ophthalmol 2001; 131:691-8. [PMID: 11384563 DOI: 10.1016/s0002-9394(00)00947-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [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: 11/23/2022]
Abstract
PURPOSE The efficacy and safety of emedastine 0.05% eye drops (Emadine; Alcon Laboratories, Inc, Fort Worth, Texas), a new H(1) antagonist, were studied in comparison to levocabastine 0.05% eye drops (Livostin; Janssen-Cilag N V, Berchem, Belgium) during a twice-daily treatment schedule for 6 weeks in adult and pediatric patients with seasonal allergic conjunctivitis. METHODS In a prospective, multicenter, randomized, double-masked, parallel group study, 222 patients with allergic conjunctivitis were randomized (221 received treatment) to either emedastine or levocabastine, instilled twice daily for 6 weeks. Patient diaries were completed four times daily (before the morning and evening instillations, at noon, and in the afternoon), and clinical examinations were conducted at regular intervals. Primary efficacy variables of ocular redness and itching and secondary efficacy variables of chemosis, eyelid swelling, patient diary data, and physician's global assessment were analyzed. RESULTS Both emedastine and levocabastine produced a statistically significant (P =.0001) reduction in itching and redness within 5 minutes of the first instillation. All signs and symptoms improved progressively over the 6-week treatment period. After 7 days of use, and throughout the remainder of the study, emedastine was statistically superior to levocabastine (P <.006) in preventing and alleviating the signs and symptoms (itching, redness, chemosis, and eyelid swelling) of allergic conjunctivitis. CONCLUSIONS Emedastine 0.05% eye drops administered twice daily are more efficacious than levocabastine 0.05% eye drops in the prevention and treatment of the signs and symptoms of allergic conjunctivitis in adults and children of 4 years and above. Both emedastine 0.05% eye drops and levocabastine 0.05% eye drops were well tolerated.
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Affiliation(s)
- P Verin
- Department of Ophthalmology, Centre Jean Abadie, 19 rue Thiac, Bordeaux, France
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Seliger M, Knorr M. [Does public access to defibrillators have a chance in Germany?--On the US model, legal considerations and justification]. Gesundheitswesen 2000; 62:665-9. [PMID: 11199203 DOI: 10.1055/s-2000-10432] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 10/17/2022]
Abstract
PURPOSE The introduction of public access to defibrillation via automated external defibrillators makes it possible to reduce the incidence of sudden cardiac arrest cases. Since they may expect civil and criminal liability after negligence causing damage, many German potential First Responders might hesitate to use an AED. METHODS After we demonstrate the medical reasons and compare the legal situation of Public Access Defibrillation between the USA and Germany we analyse a possible hesitation of German First Responders. RESULTS More than 30 states of the USA provide immunity from civil liability after a public access defibrillation followed by damage due to negligence. However, only an AED-trained US-First Responder is granted immunity from civil liability. In Germany there is no immunity from civil and criminal liability in case of public access defibrillation with damage caused by negligence. CONCLUSION German law will not decrease any possible hesitation by First Responders. For a successful system of public access defibrillation, revision of the legal situation is mandatory.
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Affiliation(s)
- M Seliger
- Institut für Arterioskleroseforschung an der Universität Münster
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Abstract
An unprecedented, intramolecular metal-to-metal silyl ligand migration reaction has been discovered in a series of phosphido-bridged iron-platinum complexes and which may be triggered by an external nucleophile. Thus, reaction of solutions of [(OC)3-(R1/3Si)Fe(mu-PR2R3)Pt(1,5-COD) (1a R1 = OMe, R2 = 3 = Ph; 1b R1 = OMe, R2 = R3 = Cy; 1c R1 = Ph, R2 = R3 = Ph; 1d R1 = Ph, R2 = R3 = Cy; 1e R1 = Ph, R1 = H, R3 = Ph) in CH2Cl2 with CO rapidly afforded the corresponding complexes [(OC)4Fe(mu-PR2R3)Pt(SiR1/3)-(CO)] (2a-e) in which the silyl ligand has migrated from Fe to Pt, while two CO ligands have been ligated, one on each metal. When 1a or 1c was slowly treated with two equivalents of tBuNC at low temperature, quantitative displacement of the COD ligand was accompagnied by silyl migration from Fe to Pt and coordination of an isonitrile ligand to Fe and to Pt to give [(OC)3-(tBuNC)Fe(mu-PPh2)Pt[Si(OMe)3](CNtBu)] (3a) and [(OC)3(tBuNC)-Fe(mu-PPh2)Pt[SiPh3](CNtBu)] (3c). Reaction of 2a with one equivalent of tBuNC selectively led to substitution of the Pt-bound CO to give [(OC)4-Fe(mu-PCy2)Pt[Si(OMe)3](CNtBu)] (4b), which reacted with a second equivalent of tBuNC to give [(OC)4Fe(mu-PCy2)-Pt[Si(OMe)3](CNtBu)2] (5b) in which the metal-metal bond has been cleaved. Opening of the Fe-Pt bond was also observed upon reaction of 3a with tBuNC to give [(OC)3(tBuNC)-Fe(mu-PPh2)Pt[Si(OMe)3](CNtBu)2] (6). The silyl ligand migrates from Fe, in which it is trans to mu-PR2R3 in all the metal-metal-bonded complexes, to a position cis to the phosphido bridge on Pt. However, in 5a,b and 6 with no metal-metal bond, the Pt-bound silyl ligand is trans to the phosphido bridge. The intramolecular nature of the silyl migration, which may be formally viewed as a redox reaction, was established by a cross-over experiment consisting of the reaction of 1a and 1d with CO; this yielded exclusively 2a and 2d. The course of the silyl-migration reaction was found to depend a) on the steric properties of the -SiR1/3 ligand, and for a given mu-PR2R3 bridge (R2 = R3 = Ph), the migration rate decreases in the sequence Si(OMe)3> SiMe2Ph> SiMePh2>>SiPh3; b) on the phosphido bridge and for a given silyl ligand (R1 = OMe), the migration rate decreases in the order mu-PPh2 >> mu-PHCy; c) on the external nucleophile since reaction of 1c with two equivalents of P(OMe)3, P(OPh)3 or Ph2PCH2C(O)Ph led solely to displacement of the COD ligand with formation of 11a-c, respectively, whereas reaction with two equivalents of tBuNC gave the product of silyl migration 3c. Reaction of [(OC)3-[(MeO)3Si]Fe(mu-PPh2)Pt(PPh3)2] (7a) with tBuNC (even in slight excess) occurred stereoselectively with replacement of the PPh3 ligand trans to mu-PPh2, whereas reaction with CO led first to [(OC)3((MeO)3Si)Fe(mu-PPh2)Pt(CO)-(PPh3)] (8a), which then isomerized to the migration product [(OC)4Fe(mu-PPh2)Pt[Si(OMe)3](PPh3)] (9a). Most complexes were characterized by elemental analysis, IR and 1H, 31P, 13C, and 29Si NMR spectroscopy, and in five cases by X-ray diffraction.
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Affiliation(s)
- P Braunstein
- Laboratoire de Chimie de Coordination, UMR 7513 CNRS, Institut Le Bel, Université Louis Pasteur, Strasbourg, France.
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Kristensen M, Knorr M, Spencer AG, Jespersen JB. Selection and reversion of azamethipos-resistance in a field population of the housefly Musca domestica (Diptera: Muscidae), and the underlying biochemical mechanisms. J Econ Entomol 2000; 93:1788-1795. [PMID: 11142314 DOI: 10.1603/0022-0493-93.6.1788] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The organophosphorus insecticide, azamethiphos, is widely used throughout the world to control the housefly, Musca domestica (L.). Since its commercial introduction to Denmark in 1983 for this purpose, we have monitored the toxicity of azamethiphos to housefly populations at livestock farms throughout the country and carried out regular field studies. The findings of our field studies, which have revealed a strong potential for resistance development, have been born out by regular surveys showing that resistance has increased in recent years. Through the analysis of a field derived laboratory strain, we have implicated oxidative and hydrolytic mechanisms together with altered acetylcholinesterase in this resistance. Our field and laboratory studies have also indicated that resistance is relatively unstable, and can revert in the absence of selection. The implications of our findings for the continued efficacy of azamethiphos are discussed.
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Affiliation(s)
- M Kristensen
- Department of Entomology, Danish Pest Infestation Laboratory, Lyngby
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Thiel HJ, Denk PO, Knorr M. [Are filtering interventions in glaucoma patients with extensive visual field defects associated with a higher functional risk?]. Ophthalmologe 2000; 97:336-41. [PMID: 10892277 DOI: 10.1007/s003470050533] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 11/26/2022]
Abstract
BACKGROUND We evaluated the prevalence of the loss of visual acuity due to loss of the central portion of the visual field and foveolar fixation in the first week after glaucoma filtering surgery. PATIENTS AND METHODS We included 408 patients, in whom glaucoma filtering surgery was performed between January 1993 and April 1997 at the University Eye Clinic in Tübingen and who had completed 1-year follow-up examinations. The retrospective evaluation included preoperative, intraoperative and postoperative data. We excluded all patients who did not complete 1-year follow-up examinations (12 +/- 3 months), who have died during the 1-year follow-up, who had combined glaucoma and cataract surgery or in whom the Molteno implant procedure was performed. RESULTS A total of 404 patients (99.3%) did not suffer loss of the central visual field and foveolar fixation in the first week after glaucoma filtering surgery. In 11 cases, loss of visual acuity > 2 dB was due to progressive lens opacification. One patient suffered from postoperative progression of his age-related maculopathy. In one patient (0.2%) progression of a preexisting relative central scotoma occurred immediately after the operation. Two patients (0.5%) suffered from loss of fixation and the central visual field immediately after glaucoma filtering surgery. CONCLUSIONS Loss of the central visual field and central fixation immediately after glaucoma filtering surgery is a rare complication. Therefore, glaucoma filtering surgery can also be recommended for patients with advanced visual field defects.
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Affiliation(s)
- H J Thiel
- Abteilung I, Universitätsaugenklinik Tübingen
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Denk PO, Roth-Eichhorn S, Gressner AM, Knorr M. Effect of cytokines on regulation of the production of transforming growth factor beta-1 in cultured human Tenon's capsule fibroblasts. Eur J Ophthalmol 2000; 10:110-5. [PMID: 10887920 DOI: 10.1177/112067210001000203] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [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: 11/15/2022]
Abstract
PURPOSE Transforming growth factor-beta1 (TGF-beta1) is thought to play a pivotal role in the regulation of the wound healing process after glaucoma filtering surgery. The aim of the present study was to investigate whether platelet-derived growth factor isoforms (PDGF-AA, PDGF-BB), basic fibroblast growth factor (bFGF), epidermal growth factor (EGF), interleukin-1beta (IL-1beta) and transforming growth factor-beta1 (TGF-beta1) modulate the production of latent and/or active TGF-beta1 by cultured human Tenon's capsule fibroblasts (HTF). METHODS Human Tenon's capsule fibroblasts were seeded at two different densities (30 cells/mm2 and 150 cells/mm2) and stimulated for five days with PDGF-AA, PDGF-BB, bFGF, EGF, IL-1beta and TGF-beta1. Control cells were treated with serum-free medium (WM/F12). The concentrations of latent and active TGF-beta1 in the medium were determined using an immunoassay before and after activation of TGF-beta1 by transient acidification. RESULTS The concentration of latent TGF-beta1 in conditioned media from HTF seeded at high density (150 cells/mm2) significantly increased after stimulation with 5 ng/ml TGF-beta1 (151.5 +/-41.7 pg/ml) or 10 ng/ml IL-1beta (45.7+/-8.1 pg/ml). The concentration of active TGF-beta1 in conditioned media also significantly increased after stimulation of HTF with 5 ng/ml TGF-beta1 (48.4+/-27.5 pg/ml). CONCLUSIONS The present results indicate that TGF-beta1 is the most potent inducer of its own synthesis in HTF. Activation of an autocrine TGF-beta1 loop may play a role in the wound healing response after glaucoma filtering surgery.
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Affiliation(s)
- P O Denk
- Department of General Ophthalmology, University Eye Clinic, Tübingen, Germany.
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Busch T, Kuhlen R, Knorr M, Kelly K, Lewandowski K, Rossaint R, Falke KJ, Gerlach H. Nasal, pulmonary and autoinhaled nitric oxide at rest and during moderate exercise. Intensive Care Med 2000; 26:391-9. [PMID: 10872130 DOI: 10.1007/s001340051172] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [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
OBJECTIVE To investigate nasal nitric oxide (NO) excretion, pulmonary NO excretion, and autoinhalation of nasally released NO at rest compared with that during moderate exercise in smokers and non-smokers. DESIGN Prospective observational study. SETTING University laboratory. PARTICIPANTS Fourteen healthy adult volunteers. INTERVENTIONS Breathing of NO-purified air supplied via a tube system at rest and during a bicycle-ergometer workload of 60 Watt over a time of 10 min. MEASUREMENT AND RESULTS We examined nasal and pulmonary NO excretion in smoking (n = 7) and non-smoking (n = 7) adult human volunteers. At rest, we measured constant nasal NO excretion rates of 311 +/- 89 nl/min for non-smokers and 261 +/- 142 nl/min for smokers (mean +/- SD, n.s.). During 60 W exercise, nasal NO release remained unchanged, while pulmonary NO excretion doubled compared with the rates at rest (non-smokers: 40 +/- 21 nl/min versus 23 +/- 14 nl/min, p < 0.05; smokers: 41 +/- 8 nl/min versus 22 +/- 8 nl/min, p < 0.05). The differences between smokers and non-smokers in nasal or pulmonary NO excretion were not significant. To determine the autoinhaled amount of nasally released NO, we also measured the NO concentration within the nasopharynx of five volunteers during nasal breathing. The average inhaled NO concentration was 17.8 +/- 3.1 ppb at rest and this decreased to 9.3 +/- 1.8 ppb during exercise of 60 W, while minute ventilation approximately doubled from 9 +/- 2 to 21 +/- 3 l/min. CONCLUSION Our results demonstrate that moderate exercise increased exclusively pulmonary NO excretion. Nasal NO release, which is 10 times higher at rest, was not changed. The decrease in autoinhaled NO concentration during exercise results from dilution of the continuous nasal release by the increased respiratory gas flow. The individual NO release allows no conclusion about smoking habits.
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Affiliation(s)
- T Busch
- Klinik für Anaesthesiologie und operative Intensivmedizin, Charité-Campus Virchow Klinikum, Humboldt-Universität zu Berlin, Germany
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Denk PO, Roth-Eichhorn S, Gressner AM, Knorr M. Cytokine regulation of hyaluronate production by human Tenon's capsule fibroblasts. Curr Eye Res 2000; 20:77-80. [PMID: 10617906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
PURPOSE The high-molecular weight glycosaminoglycan hyaluronate (HA), a component of the extracellular matrix, has been shown to play important roles in many biological processes including cell proliferation, migration and differentiation. In the present study, the effect of cytokines on production of hyaluronate (HA) by human tenon's capsule fibroblasts (HTF) was determined. METHODS HTF (2(nd) passage) were seeded at a cell density of 30 cells/mm(2) and stimulated by six different cytokines (platelet-derived growth factor (PDGF)-AA, PDGF-BB, basic fibroblast growth factor (bFGF), epidermal growth factor (EGF), interleukin (IL)-1beta and transforming growth factor (TGF)-beta1). Controls were treated with aliquots of serum-free medium only. Concentrations of HA were determined using a radiometric assay based on the specific binding of HA to HA binding proteins. RESULTS The concentration of HA in conditioned medium of HTF was significantly increased only after stimulation with PDGF-AA [10 and 100ng/ml], IL-1beta [1 and 10ng/ml] and TGF-beta1 [5ng/ml]. CONCLUSIONS Production of HA by HTF is regulated by PDGF-AA, IL-1beta and TGF-beta1 and is speculated to be involved in the wound healing reaction after glaucoma filtration surgery.
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Affiliation(s)
- P O Denk
- Dept. of General Ophthalmology, University Eye Clinic, Tübingen, Germany.
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Denk PO, Knorr M. Effect of heparin on human corneal fibroblast proliferation in vitro with and without growth factor stimulation. Graefes Arch Clin Exp Ophthalmol 1999; 237:342-7. [PMID: 10208268 DOI: 10.1007/s004170050242] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [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] Open
Abstract
BACKGROUND The outcome of keratorefractive procedures such as PRK and LASIK is limited by the wound-healing process in the corneal stroma, which gives rise to complications such as haze formation and regression. The proliferation and matrix synthesis of corneal stromal fibroblasts is the central element of the wound-healing process. In order to develop new therapeutic strategies to reduce wound-healing intensity, we investigated the effect of heparin on the proliferation of cultured human corneal stromal fibroblasts (HCF) alone and in the presence of growth factors. METHODS Primary cultures of HCF were established using epithelium and endothelium-free explants. Secondary cultures of HCF (first passage), cultured in WM/F12 supplemented with 10 microg/ml transferrin and 10 microg/ml thyroglobulin (LR-1 medium), 1% fetal calf serum (FCS) and 10% FCS were used to determine the effect of heparin on the proliferation of HCF in concentrations ranging from 12.5 microg/ml to 5000 microg/ml. Cell number was determined using the CASY 1 cell counter system. Modulation of HCF proliferation by heparin (50 microg/ml and 2000 microg/ml) was also investigated under serum-free conditions and in the presence of bFGF, EGF and PDGF-BB. RESULTS Addition of heparin led to a dose-dependent inhibition of proliferation after 6 days of incubation, which was statistically significant for 500-5000 microg heparin/ ml (FCS 1%) and for 200-5000 microg heparin/ml (FCS 10%). IC50 values for this effect were determined to be approximately 700 microg heparin/ml. When cultured under serum-free conditions (LR-1), a significant reduction of cell number was only observed with 5000 microg heparin/ml. There was no significant modulation of PDGF-BB-, bFGF-, or EGF-stimulated cell proliferation by heparin at concentrations of 50 microg/ml and 2000 microg/ml after 6 days of incubation. CONCLUSION Our observations indicate that heparin can inhibit proliferation of HCF effectively. The results of the present study could eventually pave the way to prevent anterior stromal haze formation and regression after keratorefractive surgery.
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Affiliation(s)
- P O Denk
- University Eye Hospital Tübingen, Germany.
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25
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Denk PO, Dieter M, Knorr M. [Prognostic value of anterior chamber hemorrhage following glaucoma filtering surgery]. Klin Monbl Augenheilkd 1999; 214:156-9. [PMID: 10220727 DOI: 10.1055/s-2008-1034768] [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: 10/21/2022]
Abstract
PURPOSE Evaluation of the prognostic significance of a postoperative anterior chamber hemorrhage (ACH) after glaucoma filtering surgery. PATIENTS AND METHODS Records of 332 patients, who had undergone filtering surgery between 1/1993 and 2/1997, were analyzed retrospectively with particular concern on epidemiologic data, pre- and postoperative regulation of intra-ocular pressure (IOP), complications including ACH, postoperative 5-fluouracil (5-FU) therapy and postoperative IOP lowering therapy. Surgical success was defined as (1) IOP reduction below 21 mm Hg, (2) relative IOP reduction at least 20% and (3) no reoperation to control IOP until the first-year examination. RESULTS 60 out of 332 patients (18.1%) suffered from ACH after glaucoma filtering surgery. 24 patients with ACH were treated with 5-FU, postoperatively. When all patients with ACH were considered in the evaluation, the difference between the success rate of patients with ACH and the success rate of patients without ACH was not statistically significant. In contrast, when ACH was the only complication in patients, who were not treated with 5-FU, the success rate was significantly worse (38%), when compared with the control group (patients, who did not have ACH or who had other complications in addition to ACH) (67%) (p = 0.008). When patients with these criteria received 5-FU postoperatively, the difference between success rates of both groups was not any longer statistically significant (p = 0.99). DISCUSSION The postoperative occurrence of anterior chamber hemorrhage is associated with a higher failure rate of filtering surgery. Early administration of 5-FU is recommended in these cases.
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Affiliation(s)
- P O Denk
- Abteilung I, Allgemeine Augenheilkunde und Poliklinik, Universitätsaugenklinik Tübingen.
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26
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Wunderlich K, Knorr M, Northoff H, Thiel HJ. [Effect of lymphocyte-conditioned medium on expression of smooth muscle alpha-actin in lens epithelium cells in situ]. Ophthalmologe 1999; 96:174-81. [PMID: 10234965 DOI: 10.1007/s003470050390] [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: 10/28/2022]
Abstract
PURPOSE Contraction of the capsule of the ocular lens is based upon proliferation and contraction of transformed lens epithelial cells. It is assumed that these processes can be assisted by postoperative intraocular inflammation. Previously, we reported that lens epithelial cell proliferation is enhanced by lymphocyte-conditioned medium (LCM). In this study we investigated the effect of LCM as well as of a culture medium conditioned by pigmented ciliary epitheilal cells (CBCM) on the expression of the smooth-muscle alpha-actin of the contractile cytoskeletal elements. METHODS Explants of the anterior lens capsule of freshly enucleated bovine eyes were cultured in serum-free LCM and CBCM for 3 days, followed by fixation. Smooth-muscle alpha-actin was identified by indirect immunoflorescence. Explants cultured in serum-free bFGF-containing and TGF-beta containing medium served as control. RESULTS Lens epithelial cells expressed smooth-muscle alpha-actin under the influence of LCM or TGF-beta. No smooth muscle alpha-actin could be detected under the influence of CBCM or bFGF. CONCLUSION Our results demonstrate that secreted molecules of activated lymphocytes are able to induce the transformation of lens epithelial cells into contractile myofibroblasts and may be involved in the post-operative contraction of lens capsules.
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Abstract
Wound healing after glaucoma filtering surgery is characterized by a complex sequence of molecular and cellular events. Results of recent investigations have shown that the activation, migration, proliferation and differentiation of Tenon's capsule fibroblasts represents the central element of the wound healing response. An exaggerated wound healing will result in the closure of the artificial fistula between the anterior chamber and the subconjunctival space, leading to an increase in intraocular pressure. The present review summarizes the current knowledge regarding the most important cellular and molecular mechanisms, which regulate the postsurgical wound healing response in the subconjunctival space. Special emphasis will be put on the specific role of cytokines during the wound healing response. An extensive understanding of these mechanisms appears pivotal for the development of specific therapeutic strategies to inhibit the events which lead to fibrogenesis and scarring in the wound region after glaucoma filtration surgery. The databank was Medline.
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Affiliation(s)
- M Knorr
- Universitätsaugenklinik Tübingen, Abteilung I: Allgemeine Augenheilkunde mit Poliklinik
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28
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Abstract
PURPOSE In the present study, the effect of three different serum-free and one serum-containing control medium on adhesion, proliferation, cryopreservation and PDGF-induced effects on cell proliferation of human Tenon's capsule fibroblasts (HTF) was compared. MATERIALS AND METHODS Third passage HTF were suspended in four different culture media (WM/F12, WM/F12/FCS 1%, LR-1, DMEM) and plating efficiency was determined after 24h using a cell counter system. Subsequently, cells were seeded at a density of 50/mm2 and cultured for ten days using the different culture media. Cell number was determined at day 2, 4, 7 and 10 after seeding. Furthermore, HTF cultured under the different conditions were stimulated by PDGF-BB [50 ng/ml]. Additionally, cell vitality after two weeks cryopreservation in five different culture media (WM/F12, WM/F12/FCS 1%, WM/F12/FCS 20%, LR-1, DMEM) was determined. RESULTS The plating efficiency of HTF when seeded in serum-free medium ranged from 55.3% to 59.6%. Using serum containing WM/F12/FCS 1% a slightly higher plating efficiency of 74.8% was obtained. Proliferation assays revealed population doublings of 0.77 with WM/F12/FCS 1% after an incubation period of 10 days. Cultivation of HTF using serum-free conditions did not cause significant cell proliferation but a slight cell loss which ranged from 23.1% to 34%. Addition of PDGF-BB resulted in a significant increase in cell proliferation with WM/F12/FCS 1%, WM/F12 and DMEM. After two weeks of cryopreservation in WM/F12, LR-1, DMEM, WM/F12/FCS 1% and WM/F12/FCS 20%, only the application of high serum concentrations led to sufficient preservation of cell vitality with a plating efficiency of 82.9%. DISCUSSION The results of the present study demonstrate that the use of serum-containing media is mandatory for cryopreservation of HTF. Seeding of cells can be performed either with serum or without serum. HTF cultured under serum-free conditions can be maintained quiescent with a sufficient number of cells remaining vital. The serum-free media used in this study can be applied for the investigation of cytokine effects on HTF.
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Affiliation(s)
- P O Denk
- University Eye Clinic Tübingen, Dep.I: General Ophthalmology.
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Abstract
BACKGROUND In order to develop new strategies for the pharmacological modulation of posttraumatic and postsurgical wound healing of the corneal stroma, the effect of Trapidil, a competitive platelet-derived growth factor (PDGF) antagonist, on the proliferation of cultured bovine stromal fibroblasts (BSF) was investigated. METHODS BSF, obtained from explant cultures, were seeded at a cell density of 100/mm2. The effect of various concentrations of Trapidil on cell viability and cell proliferation was determined using three different culture conditions: (1) serum-free medium (WM/F12), (2) serum-containing medium (WM/F12 + 10% FCS), and (3) serum-free medium + 50 ng/ml PDGF-BB. Trapidil was added in concentrations ranging from 100 micrograms/ml to 400 micrograms/ml. Cell numbers were determined 2 and 5 days after addition of Trapidil, using a computer-based cell-counting system. Cell viability was evaluated morphologically and by means of a repopulation assay. RESULTS Addition of Trapidil (100-400 micrograms/ml) led to a significant, dose-dependent inhibition of both serum- and PDGF-BB-induced proliferation of BSF. In contrast, treatment of quiescent BSF, cultured in serum-free medium, did not result in a significant reduction of cell number. No cytotoxic effects were observed. CONCLUSION The results of the present study demonstrate an inhibitory effect of Trapidil on the proliferation of BSF. It can be assumed that application of Trapidil might be a useful tool in the prevention of corneal complications after trauma (e.g., scarring, astigmatism and--with respect to photorefractive procedures--formation of haze and regression of the refractive effect).
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Affiliation(s)
- M Knorr
- Department of General Ophthalmology, University Eye Clinic, Tübingen, Germany
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Schimek F, Nogová L, Sevcík P, Knorr M. [Review of general anesthesia procedures in ophthalmology]. Cesk Slov Oftalmol 1998; 54:263-75. [PMID: 9721493] [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] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We review the anaesthetic management of patients undergoing ophthalmic examination or surgery. General anaesthesia is administered in patients demanding immobilisation, since uncontrolled movement may rise intraocular pressure (IOP) and thus endanger the overall outcome of ophthalmic care. We discuss the effects of anaesthetics and anaesthesia related medications on IOP before, during, and after eye surgery. Also, we analyse anaesthetic procedures applied in eye injury management, vitreal and strabismus surgery as well as paediatric ophthalmology. Finally, we review the systemic side effects of topical eye medications, the complications of ophthalmic general anaesthesia as well as their prevention.
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Affiliation(s)
- F Schimek
- Klinik für Anästhesiologie und Transfusionsmedizin Eberhard-Karls-Universität-Tübingen
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May A, Shepheard SL, Knorr M, Effert R, Wessing A, Hargreaves RJ, Goadsby PJ, Diener HC. Retinal plasma extravasation in animals but not in humans: implications for the pathophysiology of migraine. Brain 1998; 121 ( Pt 7):1231-7. [PMID: 9679775 DOI: 10.1093/brain/121.7.1231] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.5] [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: 11/14/2022] Open
Abstract
High-intensity electrical stimulation of the trigeminal ganglion is accompanied by mast cell degranulation, vasodilatation, increased endothelial permeability and leakage of albumin from postcapillary venules within the dura mater. Overall, the histological appearance suggests an evolving sterile inflammatory response. This neurogenic inflammation within the meninges has been suggested as a model to explain the pain in migraine and cluster headache, and has been used to characterize the pharmacology of anti-migraine compounds. Using the rat model of neurogenic inflammation, the albumin extravasation ratio (stimulated : unstimulated side) in vehicle-treated animals in the dura and retina was 1.60 +/- 0.11 and 1.76 +/- 0.18, respectively (n = 10; values are mean +/- SEM). Pretreatment with sumatriptan (n = 9) produced a highly significant reduction in the ratio of extravasation within the dura to 1.10 +/- 0.06 (P = 0.002) and in the retina to 0.96 +/- 0.06 (P = 0.001), as did the neurokinin-1 receptor antagonist RP 67580 (n = 12) in the dura (1.04 +/- 0.11, P = 0.002) and retina (1.08 +/- 0.06, P = 0.001). These data demonstrate increased endothelial permeability and leakage of albumin not only in the dura but also in the retina. In a second stage we investigated possible extravasation in the human retina in acute migraine (n = 8) and cluster headache (n = 5) using fluorescein or indocyanine angiography. No increased endothelial permeability or leakage of dye could be found in the human retinal or choroidal vessels during headache attacks or in the headache-free interval in persons suffering from both migraine and cluster headache. These data raise the possibility that neurogenic inflammation is not a major factor in headache attacks in migraine or cluster headache.
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Affiliation(s)
- A May
- Institute of Neurology, London, UK.
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Abstract
PURPOSE To report the therapy of benign eyelid tumors with an argon laser as an alternative to surgery. METHODS Forty-one patients with 47 benign tumors of the eyelid were included in this study. In all patients, the eyelid tumor was eliminated by argon laser. In 24 cases the lower eyelid and in 23 cases the upper eyelid was involved, including the lid margin in 17 cases. Laser spot size ranged from 150 to 500 microm. Argon laser power density varied between 4.1 and 61.1 W/mm2. Spots were counted between 40 and 1204. Twenty-seven of 41 patients treated were followed up; the mean follow-up period was 5.8 months (range, 3 to 24 months). Postoperatively, histologic confirmation was obtained in 42 cases of the 47 treated tumors. RESULTS All patients were satisfied regarding the laser therapy and the cosmetic result. Remarkably, the wounds were dry after argon laser therapy. No infections of the wounds occurred; wounds were epithelialized after 2 to 3 weeks by a normal-appearing epithelium. The area of argon laser treatment was less pigmented than the surrounding skin and showed no obvious remarkable notches. As a complication, one patient developed a viral conjunctivitis. No relapses occurred during follow-up. CONCLUSIONS Argon laser therapy of benign eyelid tumors may result in very satisfactory wound healing. Taking the short follow-up and the limited number of cases into account, it seems to be a useful alternative to traditional surgery, especially for tumors positioned close to the lacrimal papillae.
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Affiliation(s)
- T M Wohlrab
- Eye Clinic, Vogtland-Clinic Plauen, Germany.
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Abstract
UNLABELLED The purpose of the present study was to conduct a comparative evaluation of the effect of several serum-free culture conditions on adhesion, population doubling, cryopreservation and PDGF-induced effects on cell proliferation of bovine stromal fibroblasts (BSF). Additionally, these effects were compared to serum-containing cultures. METHODS Only second-passage BSF were used. Cells were cultured using four different culture media (WM/F12, WM/F12 + FCS 1%, LR-1, DMEM). After 24 h, plating efficiency was determined using a cell-counter system. Subsequently, the cells were seeded at a density of 100 cells/mm2 and cultured for 10 days using the different culture media. Cell number was determined at day 2, 4, 7 and 10 after seeding. Furthermore, the effect of 50 ng/ml PDGF-BB on the proliferation of BSF was tested for these conditions. Cell vitality was determined after cryopreservation of two weeks for each culture medium. RESULTS The plating efficiency of BSF ranged from 50.2 to 55.5% for the serum-free culture media in contrast to serum-containing conditions, where plating efficiency was 94.8%. With WM/F12 + FCS 1%, a population doubling of 1.27 was observed after an incubation period of 10 days. In contrast, cultivation under serum-free conditions caused neither significant cell proliferation nor cell loss. The stimulation of cell proliferation with PDGF-BB was shown to be 28% (LR1), 40% (WM/F12 + FCS 1%) 76% (WM/F12) and 95% (DMEM) compared to the control. While cell vitality after cryo-preservation was found to be 62.7% using WM/F12 + FCS 1%, vitality using serum-free media was 12.6-22.8%. CONCLUSIONS The results of the present study demonstrate that with respect to optimal cell adhesion and cell vitality after cryo-preservation, serum-containing media should be used. BSF cultured under the serum-free conditions used in the present study can be maintained quiescent and vital for at least 10 days. Therefore, these serum-free media are useful for cell-culture studies (e.g., determination of proliferation and cytotoxicity).
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Affiliation(s)
- P O Denk
- Allgemeine Augenheilkunde mit Poliklinik, Universitäts-Augenklinik Tübingen
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Schlote T, Kreutzer B, Kriegerowski M, Knorr M, Thiel HJ. [Diode laser cyclophotocoagulation in treatment of therapy refractory glaucoma]. Klin Monbl Augenheilkd 1997; 211:250-6. [PMID: 9445913 DOI: 10.1055/s-2008-1035131] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [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: 02/05/2023]
Abstract
BACKGROUND It has been suggested that Nd:YAG laser cyclophotocoagulation significantly lowers the intraocular pressure in refractory glaucoma. However, only limited information is currently available concerning the cyclodestructive effects of diode laser cyclophotocoagulation. PATIENTS AND METHODS Twenty eyes of 17 patients had undergone diode laser cyclophotocoagulation if previous glaucoma surgery including cyclocryocoagulation was unsuccessful or the patients were blind. Nine eyes had secondary glaucoma, 5 neovascular glaucoma, 5 congenital glaucoma, and 1 eye chronic open angle glaucoma. Treatment was applied in two quadrants using a 810 nm diode laser (600 qm diameter quartz fiber, 2 sec, 1.75-3 W, 6 to 10 pulses). Seven eyes required retreatment. RESULTS In 19 eyes the baseline IOP was 32.1 +/- 10.1 mm Hg and at the patient's last examination 21.0 +/- 8.4 mm Hg. Median follow up was 11 months (3 to 19 months). In 4 of 5 eyes with a visual acuity of less than 1/50 IOP was decreased under 30 mm Hg, while 9 of 14 eyes with a visual acuity of at least 1/50 IOP revealed a decrease of IOP under 20 mm Hg, resulting in a success rate of 68%. Complications included acute severe anterior uveitis in one eye and bulbus hypotonia in another for several months. After three weeks, one eye was enucleated because of persisting high IOP and pain. Histopathologically, coagulation necrosis of the ciliary body stroma and separation of epithelial layers were observed. CONCLUSIONS This study suggests that contact diode laser cyclophotocoagulation is an effective method and a valid alternative to cyclocryocoagulation in the treatment of refractory glaucoma including congenital glaucoma.
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Affiliation(s)
- T Schlote
- Abteilung I: Allgemeine Augenheilkunde mit Poliklinik, Universitäts-Augenklinik Tübingen
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Knorr M, Völker M, Denk PO, Wunderlich K, Thiel HJ. Proliferative response of cultured human tenon's capsule fibroblasts to platelet-derived growth factor isoforms. Graefes Arch Clin Exp Ophthalmol 1997; 235:667-71. [PMID: 9349953 DOI: 10.1007/bf00946945] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [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: 02/05/2023] Open
Abstract
BACKGROUND Although platelet-derived growth factor (PDGF) has been thought to be critical in the wound-healing response of Tenon's capsule fibroblasts after glaucoma filtration surgery, no information is currently available concerning the proliferative effect of PDGF isoforms on this cell type. The aim of the present study was to evaluate the proliferative effect of PDGF-AB heterodimer and PDGF-AA and -BB homodimers on cultured human Tenon's capsule fibroblasts. METHODS Human Tenon's capsule fibroblasts, cultured under serum-free conditions, were stimulated with PDGF-AA, -AB and -BB isoforms in concentrations ranging from 1 to 100 ng/ml. Cell numbers were determined on days 1, 3, 5 and 7, using a cell counter. RESULTS Addition of PDGF-AB and -BB led to a dose-dependent increase in cell proliferation. A maximal response (79.9% over control) was obtained after 7 days with 30 ng/ml of PDGF-BB, with an EC50 of 8.9 ng/ml. The maximal increase in cell proliferation caused by PDGF-AB (30 ng/ml) was 54.9%, with an EC50 of 12.5 ng/ml. Stimulation with PDGF-AA revealed a significant effect only with concentrations higher than 30 ng/ml. CONCLUSION Our results indicate that PDGF-AB and -BB isoforms are potent stimulators of proliferation of human Tenon's capsule fibroblasts, suggesting that PDGF-AB and -BB isoforms play an important role in the wound-healing response after glaucoma filtration surgery.
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Affiliation(s)
- M Knorr
- University Eye Clinic Tübingen, Department of General Ophthalmology, Germany
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36
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Abstract
BACKGROUND Phototoxic maculopathy most likely results from longer exposure to light from sources such as the sun, welding arcs, tungsten halogen lamp filaments or operation microscopes. The value of the multifocal ERG for the evaluation of functional defects in this rare entity has not been described to date. CASES We describe the case of a 38-year-old male patient who presented to his local ophthalmologist with bilateral loss of vision and acute ocular pain after having worked for two hours at an electric welding arc. A foveal lesion was found in both eyes, resulting in a bilateral reduction of visual acuity. Nine months later, the patient underwent examination and further investigations at the university eye clinic in Tübingen. Visual field defects on both sides could be detected with automatic threshold perimetry. Using the multifocal ERG with a central element of 2 degrees diameter, a central defect was detected only for the right eye. CONCLUSIONS In rare cases, a photic maculopathy can result from exposure to light during arc welding. It can be masked in the first days by a phototoxic keratitis. Multifocal ERG and automatic perimetry are useful tools for the detection and quantification of the functional defects.
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Affiliation(s)
- P O Denk
- Abteilung I, Universitätsaugenklinik Tübingen
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Denk PO, Knorr M. The in vitro effect of platelet-derived growth factor isoforms on the proliferation of bovine corneal stromal fibroblasts depends on cell density. Graefes Arch Clin Exp Ophthalmol 1997; 235:530-4. [PMID: 9285224 DOI: 10.1007/bf00947012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 02/05/2023] Open
Abstract
PURPOSE Recently, it has been shown that corneal stromal fibroblasts express the mRNA for PDGF-beta-type receptors, while corneal epithelial cells express the mRNA for the PDGF B-chain, suggesting a role of PDGF isoforms in the regulation of corneal homeostasis and wound healing via an unidirectional epithelial to stromal paracrine interaction. The purpose of this study was to characterize the proliferative response of cultured bovine corneal stromal fibroblasts to PDGF isoforms. METHODS Bovine corneal stromal fibroblasts were seeded at a cell density of 60 cells/mm2 (low density) and 120 cells/mm2 (high density) and were cultured under serum-free conditions. Except for corresponding controls, PDGF AA, BB and AB (obtained by separate expression of cloned genes in E. coli) were added in concentrations ranging from 3.125 to 100 ng/ml. Cell numbers were determined after an incubation period of 6 days using a cell counter. RESULTS Stromal fibroblasts, when cultured at a high density, revealed constant cell numbers during the whole incubation period. Under these culture conditions, stimulation with PDGF AA, BB and AB led to a significant dose-dependent increase in cell proliferation. When cultured at a low cell density, stromal fibroblasts revealed a significant reduction of cell numbers after 6 days of incubation. This reduction was prevented by PDGF AA and AB isoforms in a dose-dependent manner. In contrast, PDGF BB was not effective. CONCLUSION The results of the "high-density" assays suggest that PDGF isoforms act as mitogens for stromal fibroblasts during wound healing, when density of fibroblasts is high. The results of the "low-density" assays support the idea that PDGF AA and AB can prevent cell loss during corneal homeostasis when density of keratocytes is low.
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Affiliation(s)
- P O Denk
- University Eye Hospital Tübingen, Germany
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38
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Denk PO, Knorr M, Kriegerowski M, Thiel HJ. [Effectiveness of dorzolamide as added therapy in glaucoma patients with maximum tolerated drug therapy. A pilot study]. Klin Monbl Augenheilkd 1997; 210:360-4. [PMID: 9333661 DOI: 10.1055/s-2008-1035075] [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: 02/05/2023]
Abstract
BACKGROUND The purpose of this study was to evaluate prospectively the value of dorzolamid as an adjunct to maximum tolerated medical therapy in glaucoma patients in whom surgery would otherwise be required. METHODS 32 eyes of 21 patients with primary open angle glaucoma (14 patients), glaucoma in aphakia (3 patients), pigmentary glaucoma (2 patients), juvenile glaucoma (1 patient) and exfoliative glaucoma (1 patient) were included. The effect of additional dorzolamid application on intraocular pressure (IOP) was determined after 2 hours, 4 days, 4 weeks, 3 months and 6 months. After 6 months, visual fields were checked. RESULTS Average reduction of IOP in eyes in which dorzolamid was continued was determined to be 31% after 2 hours, 18.3% after 4 days, 17.9% after 4 weeks, 12.1% after 3 months and 9.7% after 6 months. 19 (59%) eyes continued to receive dorzolamid after 6 months without being operated. No progression of glaucomatous damage could be detected in these eyes. In 11 (34%) eyes, treatment with dorzolamid was discontinued. 2 patients (4 (12%) eyes) did not tolerate local side effects of dorzolamid. In 7 (22%) eyes reduction of IOP was insufficient and filtration surgery had to be performed immediately. CONCLUSION The results of the present study demonstrate that dorzolamid represents an alternative to an immediate surgical management in patients on maximum tolerated therapy for at least six months.
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Affiliation(s)
- P O Denk
- Universitätsaugenklinik Tübingen, Abteilung
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39
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Abstract
PURPOSE Several previous studies have shown that glycoconjugates of extracellular matrix, cell membrane and nucleus play an important role in the mediation of cell proliferation, migration and differentiation. Lens epithelial cells and lens fiber cells show regional differences with regard to these parameters. If glycoconjugates participate in the regulation of these patterns in the lens, there should be regional differences in the expression of glycoconjugates. The investigation was focused on the anterior pole, equator and nuclear bow regions, which differ extensively in lens cell proliferation and differentiation. METHODS To check this hypothesis, the regional binding pattern of twelve different FITC-conjugated lectins was studied glycohistochemically, using paraffin embedded material. The investigation was focused on the anterior pole, equator and nuclear bow regions. RESULTS Regional differences in lectin binding patterns were identified in the lens capsule, epithelium and the nuclear bow regions. The lens capsule was fluorescently labeled with GS-I, UEA-I, LPA, MAA, SNA only at the anterior pole and with CON-A, WGA, DBA, SBA only at the equator. Staining of the entire anterior surface of the lens capsule was observed with LFA. Cell membranes of the lens epithelium showed binding of MAA and LFA only at the equator. LFA, LPA, MAA and SNA only stained the nuclei of fiber cells at the nuclear bow region but not of lens epithelial cells. WGA strongly labeled the nuclei of equatorial epithelial cells and fiber cells at the bow region. CONCLUSIONS It is assumed that the observed regional variations in glycoprotein expression in the extracellular matrix and lens cells contribute to the regulation of cell behavior in different areas of the lens.
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Affiliation(s)
- P O Denk
- Department of Ophthalmology, University of Tübingen, Germany
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40
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Abstract
BACKGROUND Both, Stickler and Marshall syndrome are dominantly inherited, connective tissue disorders with highly variable individual manifestations. Probably, both syndromes represent the same entity with occasional partially different clinical manifestations. PATIENT We are reporting on a female patient with typical ocular and systemic manifestations of both syndromes: high myopia, glaucoma and goniodysgenesis, submucosal cleft palate, sensorineural hearing loss, and "flat" mid-face. Additionally, we observed subluxation of the ocular lens in one eye which was previously described in only a few cases. In our case, subluxation was combined with nasal coloboma of the lens and congenital cataract. This represents the first report of coloboma of the ocular lens as a manifestation of Stickler (Marshall) syndrome. In both children of the patient manifestations of the syndrome were present (high myopia, cleft palate, sensorineural hearing loss). CONCLUSION Coloboma and subluxation of the lens have to be regarded as possible manifestations of the Stickler (Marshall) syndrome. The syndrome(s) should be included in the differential diagnosis of ectopia lentis-associated systemic diseases.
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Affiliation(s)
- T Schlote
- Abteilung I (Allgemeine Augenheilkunde mit Poliklinik), Universitäts-Augenklinik Tübingen
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41
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Schüller S, Knorr M, Steuhl KP, Thiel HJ. Lacrimal secretion of human epidermal growth factor in perforating keratoplasty. Ger J Ophthalmol 1996; 5:268-274. [PMID: 8911948] [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] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Human epidermal growth factor (hEGF) plays a key role in the regulation of corneal epithelial regeneration. As the lacrimal concentration of EGF is known to decrease following corneal injury, therapeutic application of exogenic EGF to support corneal wound healing is currently being investigated. To evaluate the role of topical EGF substitution in perforating keratoplasty, the lacrimal secretion of EGF was determined in 12 patients prior to keratoplasty and on the 1st and 7th days postoperatively using a newly developed modular immunofluorometric assay. EGF secretion and tear-flow rates in the tear samples of the keratoplasty patients were compared with those of 39 patients with corneal epithelial defects of other origin and those of 21 healthy controls. Levels of EGF secretion and tear flow reflectorily increased both in the post-operative samples of keratoplasty patients (secretion 0.77 +/- 0.56 pg/s, tear flow 18.7 +/- 14.9 microliter/min) and in the samples of patients with corneal epithelial defects (0.6 +/- 0.4 pg/s, 19.6 +/- 19.2 microliter/min) in comparison with preoperative values and healthy controls (0.3 +/- 0.2 pg/s, 4.0 +/- 5.4 microliter/min). Men showed higher average levels of basal and reflectory EGF secretion (0.4 and 0.8 pg/s), respectively than did women (0.25 and 0.55 pg/s, respectively). The results indicate a physiological feedback mechanism that reflectorily adjusts the lacrimal EGF secretion following corneal irritation. Topical therapy with recombinant EGF should therefore be restricted to patients with persistent corneal epithelial defects and proven deficiency of EGF secretion.
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Affiliation(s)
- S Schüller
- Universitäts-Augenklinik Tübingen, Abteilung I, Allgemeine Augenheilkunde und Poliklinik, Germany
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42
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Knorr M, Wunderlich K, Steuhl KP, Thiel HJ. [Effect of heparin and ascorbic acid on growth behavior of cultivated corneal epithelial cells of the rabbit]. Ophthalmologe 1996; 93:275-8. [PMID: 8753991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Although ascorbic acid and heparin are used for local therapy of corneal wounds that heal poorly (e.g., after chemical burns), little has been known up to now about the mechanisms underlying their effectiveness at the cellular level. The aim of the present study was therefore to evaluate the effect of heparin and ascorbic acid on the growth behaviour of corneal cells in vitro. For this purpose cell cultures from a corneal epithelial cell line were used. Stimulation of the cells with heparin at concentrations ranging from 10 to 200 micrograms/ml for 6 days led to a dose-dependent rise in growth rate (population doublings per day) of 0.48 +/- 0.50 to 2.19 +/- 1.65 (mean value +/- standard deviation, n = 10) with an EC50 of 132 micrograms/ml. In contrast, the addition of ascorbic acid at concentrations ranging from 0.5 to 3.0 mM led on average to a 40% dose-dependent inhibition of cell proliferation after 6 days, with an IC50 of 0.7 mM as-corbic acid. On the basis of these results, the use of heparin at concentrations of 180-200 micrograms/ml appears advantageous. In contrast, the local application of ascorbic acid for chemical burns with no stromal involvement should be subjected to a critical reassessment.
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Affiliation(s)
- M Knorr
- Universitäts-Augenklinik Tübingen
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43
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Starc S, Knorr M, Steuhl KP, Rohrbach JM, Thiel HJ. [Autologous conjunctiva-limbus transplantation in treatment of primary and recurrent pterygium]. Ophthalmologe 1996; 93:219-23. [PMID: 8753980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The aim of the present study was evaluation of the efficiency of limbal autograft transplantation for primary and recurrent pterygia. The results of limbal autograft transplantation for advanced and recurrent pterygia are presented for 58 eyes of 50 patients. The pterygia were primary in 40 eyes and recurrent in 18 eyes. Free grafts from the superotemporal limbus of the same eye were used to cover the exposed sclera. Postoperative followup ranged from 2 to 26 months, with a mean of 13 months. The overall recurrence rate was 31% (22.5% in primary pterygia and 50% in recurrent pterygia). Recurrence rates were significantly higher in patients from southern Europe than in patients from northern Europe. Analysis of patients with recurrences (n = 18) revealed severe tear film abnormalities in eight cases. Seven patients were found to have transplants of insufficient size. Analysis of our results provides evidence that the experience of the surgeon is crucial for the success rate of this procedure. Three of six surgeons with limited experience had a recurrence rate of 50% or more. Additionally, 15 patients who developed recurrent pterygium had returned to unfavourable working conditions (e.g. dust, heat). Three of the 18 recurrences underwent repeated limbal transplantation and in one of these there was a further recurrence.
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Affiliation(s)
- S Starc
- Abteilung I, Universitäts-Augenklinik, Tübingen
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44
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Knorr M, Hahn B, Wunderlich K, Hoppe J, Steuhl KP. [PDGF-induced effect on cytosolic free calcium concentration of cultured retinal pericytes]. Ophthalmologe 1995; 92:692-7. [PMID: 8750999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Although the selective loss of retinal pericytes has long been known to be one of the earliest histopathological findings in diabetic retinopathy, only limited information is available concerning their function and cell biology. Recently, it has been shown that the interaction of endothelial cells and pericytes plays an important role in the maintenance of vascular integrity. Additionally, it has been suggested that pericytes have a contractile function. Platelet-derived growth factor (PDGF), released from endothelial cells, has been shown to be a potent mitogen and vasoconstrictor. Cytosolic free calcium ([Ca2+]i) has been shown to play a key role as a second messenger for PDGF, involved in the regulation of various cellular functions, e.g. cell proliferation and vascular contractility. In order to characterize the effect of different PDGF homodimers on cultured bovine retinal pericytes, we investigated PDGF-AA- and -BB-dependent alterations in [Ca2+]i was determined with the Ca(2+)-sensitive fluorescent probe Quin-2. Basal levels were 118 +/- 30 nM. Stimulation with PDGF-BB in concentrations ranging from 5 to 20 ng/ml led to a dose-dependent increase of [Ca2+]i with an EC50 of 5.8 ng/ml. Maximum stimulation, to about 280% of basal levels, occurred after 3-4 min. In contrast, PDGF-AA was not effective. The results suggest that PDGF-BB may influence the integrity and contractility of the retinal microvasculature via modulation of the intracellular calcium homeostasis of pericytes. Additionally, it can be speculated that cultured retinal pericytes express mainly PDGF-beta-type receptors.
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Affiliation(s)
- M Knorr
- Universitäts-Augenklinik Tübingen
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45
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Knorr M, Erb C, Wunderlich K, Kruse F, Thiel HJ. P 221 Proliferative effect of hyaluronic acid on cultured bovine lens epithelial cells. Vision Res 1995. [DOI: 10.1016/0042-6989(95)90537-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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46
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Knorr M. Proliferative effect of hyaluronic acid on cultured bovine lens epithelial cells. Vision Res 1995. [DOI: 10.1016/0042-6989(95)98760-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Bayer AU, Erb C, Ferrari F, Knorr M, Thiel HJ. The Tübingen Glaucoma Study. Glaucoma filtering surgery--a retrospective long-term follow-up of 254 eyes with glaucoma. Ger J Ophthalmol 1995; 4:289-93. [PMID: 7496340] [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] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A major focus of our study was the ability to predict the long-term success of filtering surgery. The results of glaucoma filtering surgery (trabeculectomy) as performed by the staff of the University Eye Hospital of Tübingen from 1988 through 1994 on 254 eyes of 214 patients are presented, with particular emphasis being placed not only on intraocular pressure (IOP) control but also the progression of glaucomatous damage (visual field loss or disc damage) and the etiology of visual acuity losses. There was an overall success rate of 64%. Rigid criteria for success included an IOP of less than 30 mmHg, no further visual field loss or disc damage, and no glaucomatous etiology for a decrease in visual acuity. A total of 35 eyes (13.8%) showed a loss of visual acuity after 6 months amounting to 2 or more Snellen lines, caused mainly by lens opacification, hypotony maculopathy, and "wipeout" (loss of the central visual field in the absence of another explanation). We found that there is a considerable risk for sudden loss of visual acuity after operation on older patients with small residual visual fields and severe hypotony on the 1st postoperative day. There was a 13% incidence of failure of blebs. A total of 34 eyes had an early IOP rise of more than 30 mmHg after surgery. A postoperative hypotony of less than 3 mmHg was more significantly seen in patients treated with 5-fluorouracil. Moreover, the results show that in some instances, a long-term use of topically applied glaucoma medication can adversely affect the results of fistulizing surgery.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- A U Bayer
- Department of Ophthalmology, Eberhard-Karls-University, Tübingen, Germany
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48
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Rohrbach IM, Starc S, Knorr M. [Predicting recurrent pterygium based on morphologic and immunohistologic parameters]. Ophthalmologe 1995; 92:463-8. [PMID: 7549330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
BACKGROUND Independently of the technique for excision used, pterygia recur quite frequent. We investigated whether recurrences can be predicted by means of histological and immunohistological parameters. MATERIALS AND METHODS In a prospective clinical investigation the frequency of recurrent pterygia after excision and subsequent autologous limbal grafting was studied. The pterygia of 10 patients without recurrence (mean follow-up time 13 months) were compared retrospectively and semiquantitatively with the pterygia of 7 patients who had a recurrence. The following parameters were taken into consideration: (1) elastoid degeneration; (2) amount of vascularization; (3) morphological signs of "dry eye" (e.g., loss of goblet cells, beginning keratinization); (4) reactive inflammation; (5) amount of CD1a-, CD4-, CD8- and CD68-positive cells; (6) expression of PDGFalpha, PEDGFbeta, EGF, and laminin receptors. RESULTS No appreciable differences between recurrent and nonrecurrent pterygia were found. CONCLUSION As adjuvant therapeutic strategies like application of mitomycin C or beta-irradiation may lead to complications, it would be desirable it they could be limited to patients at risk. The histological and immunohistological parameters investigated probably do not allow prediction of pterygial recurrence. Consequently, they are not helpful in deciding whether adjuvant therapy should be started or not.
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49
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Wunderlich K, Knorr M, Thiel HJ. [Photodynamic activity of phthalocyanines in cultivated lens epithelial cells of the pig]. Ophthalmologe 1995; 92:346-51. [PMID: 7655211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
One of the most frequent complications of extracapsular cataract surgery is posterior capsule opacification (PCO), which is caused by proliferation and migration of retained lens epithelial cells on the posterior capsule surface. This complication leads to a reduction in visual acuity. Depending on the age of the patients, the incidence varies between 15 and 50%. Selective elimination of these cells would therefore prevent PCO. Phthalocyanines (Pc) are efficient photosensitizers of various carcinoma cell lines. Their attractive property is the strong absorption of visible light above 600 nm. Upon absorption of a photon, the sensitizer in its excited state can be either directly cytotoxic or produce reactive oxygen species type I (free radicals) or type II (singlet oxygen), which become the mediator of cellular injury by affecting membranes and subcellular organelles. Preconfluent cultures of porcine lens epithelial cells were incubated with aluminum phthalocyanine (AlPc) or aluminum phthalocyanine transulfonate (AlPcS4) in concentrations ranging from 0-20 microM for 1 h at 37 degrees C. Thereafter, cultures were exposed to red light for 5 min. A 300 W quartz halogen light bulb equipped with a cut-off filter that allowed transmission of the whole spectrum above 600 nm was used for activation of the sensitizers. To evaluate the effect of fluoride, 5 mM NaF was added to the dye-loaded cells immediately before light exposure. This treatment had no toxic effect. Subsequently, the treated cells were incubated in culture medium for 24 h. After trypsinization, the cell number was determined by a cell counter. Prior to light exposure neither AlPc nor AlPcS4 was toxic in corresponding controls.(ABSTRACT TRUNCATED AT 250 WORDS)
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Steuhl KP, Sitz U, Knorr M, Thanos S, Thiel HJ. [Age-dependent distribution of Langerhans cells within human conjunctival epithelium]. Ophthalmologe 1995; 92:21-5. [PMID: 7719069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Non-pathological conjunctival specimens (240) were used for evaluation of Langerhans cell (LC) numbers per square millimeter. Of the 240, 60 were taken from each of four age groups (1-20 years, 21-40 years, 41-60 years, 61 years and older). In each group, 20 came from the bulbar conjunctiva (lateral superior), 20 from the fornix region (central superior), and 20 from the palpebral conjunctiva (central inferior). Quantitative analysis was carried out with the Langerhans-specific anti-CD1a antibody using APAAP method. Additionally, 40 conjunctival specimens were stained with the Tü 36 (all HLA/DR Ag) and the Tü 39 (all HLA/DR, -/DP Ag). A basic decline in the density of LC cells corresponding to advancing age of the tissue donors was found in all three regions studied (< or = 20 years: 4.4 LC/mm2; > 60 years: 1.2 LC/mm2). The largest number of LC (4.7 LC/mm2) was found in the palpebral conjunctiva (central inferior); 3.1 LC/mm2 were found in the fornix (central superior) and 1.0 LC/mm2 in the bulbar conjunctiva (lateral superior). As an antigen-presenting cell, the LC plays an important role in immune reactions in the area of the superficial ocular epithelium. The data gained here can serve as a basis for studies of pathological tissue since, as is known from dermatological research, firm relationships exist between specific inflammatory or tumorous diseases and LC density in the affected organs. Moreover, a direct connection is to be assumed between the success of transplantation and LC density in allogenic conjunctival grafts.
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