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Stiller S, Freitag C, Allingham P, Weber K, Müller S, Bünau RV, Schimiczek M. P09-02 Probiotic Escherichia coli strain Nissle 1917 – Pre-clinical evaluation of genotoxicity. Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Stichele GV, Dürr A, Yoon G, Schüle R, Blackstone C, Esposito G, Buffel C, Oliveira I, Freitag C, van Rooijen S, Hoffmann S, Thielemans L, Cowling B. OTHER NMDs. Neuromuscul Disord 2021. [DOI: 10.1016/j.nmd.2021.07.379] [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: 11/27/2022]
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Claret PG, Treille J, Loubet P, Freitag C, Beregi JP, de La Coussaye J. Actualités sur le Covid-19. Ann Fr Med Urgence 2020. [DOI: 10.3166/afmu-2020-0243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Renard D, Freitag C, Thouvenot E. Posttraumatic hemorrhagic dilated perivascular spaces. Rev Neurol (Paris) 2019; 175:570-572. [PMID: 31167718 DOI: 10.1016/j.neurol.2018.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 11/10/2018] [Accepted: 11/13/2018] [Indexed: 11/27/2022]
Affiliation(s)
- D Renard
- Department of Neurology, Nîmes University Hospital, Nîmes, France.
| | - C Freitag
- Department of Medical Imaging, Nîmes University Hospital, Nîmes, France
| | - E Thouvenot
- Department of Neurology, Nîmes University Hospital, Nîmes, France; Institut de Génomique Fonctionnelle, UMR5203, Inserm 1191, Université Montpellier, Montpellier, France
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Hybert E, Karlsson A, Wassbjer D, So M, Kloutschek A, Knutsson K, Freitag C, Karlsteen M. Development of system for collection of positional based data for horses. J Vet Behav 2019. [DOI: 10.1016/j.jveb.2018.06.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Martinelli A, Kreifelts B, Wildgruber D, Ackermann K, Bernhard A, Freitag C, Schwenck C. FV6. Intention attribution and neural processing of laughter in female and male adolescents with conduct disorder. Clin Neurophysiol 2018. [DOI: 10.1016/j.clinph.2018.04.620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Freitag C, Noble C, Fritzsche J, Persson F, Reiter-Schad M, Nilsson AN, Granéli A, Ambjörnsson T, Mir KU, Tegenfeldt JO. Visualizing the entire DNA from a chromosome in a single frame. Biomicrofluidics 2015; 9:044114. [PMID: 26392826 PMCID: PMC4570469 DOI: 10.1063/1.4923262] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Accepted: 06/18/2015] [Indexed: 05/16/2023]
Abstract
The contiguity and phase of sequence information are intrinsic to obtain complete understanding of the genome and its relationship to phenotype. We report the fabrication and application of a novel nanochannel design that folds megabase lengths of genomic DNA into a systematic back-and-forth meandering path. Such meandering nanochannels enabled us to visualize the complete 5.7 Mbp (1 mm) stained DNA length of a Schizosaccharomyces pombe chromosome in a single frame of a CCD. We were able to hold the DNA in situ while implementing partial denaturation to obtain a barcode pattern that we could match to a reference map using the Poland-Scheraga model for DNA melting. The facility to compose such long linear lengths of genomic DNA in one field of view enabled us to directly visualize a repeat motif, count the repeat unit number, and chart its location in the genome by reference to unique barcode motifs found at measurable distances from the repeat. Meandering nanochannel dimensions can easily be tailored to human chromosome scales, which would enable the whole genome to be visualized in seconds.
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Affiliation(s)
| | - C Noble
- Department of Astronomy and Theoretical Physics, Lund University , Lund, Sweden
| | | | | | - M Reiter-Schad
- Department of Astronomy and Theoretical Physics, Lund University , Lund, Sweden
| | - A N Nilsson
- Department of Astronomy and Theoretical Physics, Lund University , Lund, Sweden
| | - A Granéli
- Department of Physics, University of Gothenburg , Gothenburg, Sweden
| | - T Ambjörnsson
- Department of Astronomy and Theoretical Physics, Lund University , Lund, Sweden
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Ferraro A, Renard D, Freitag C, Thouvenot E, Le Floch A, Boyer JC, Moesch C. Hypersignaux flair des espaces sous-archnoïdiens (ESA) et du globe oculaire (GO) après imagerie par résonance magnétique (IRM) cérébrale injectée. Rev Neurol (Paris) 2014. [DOI: 10.1016/j.neurol.2014.01.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Jarick I, Volckmar AL, Pütter C, Pechlivanis S, Nguyen TT, Dauvermann MR, Beck S, Albayrak Ö, Scherag S, Gilsbach S, Cichon S, Hoffmann P, Degenhardt F, Nöthen MM, Schreiber S, Wichmann HE, Jöckel KH, Heinrich J, Tiesler CMT, Faraone SV, Walitza S, Sinzig J, Freitag C, Meyer J, Herpertz-Dahlmann B, Lehmkuhl G, Renner TJ, Warnke A, Romanos M, Lesch KP, Reif A, Schimmelmann BG, Hebebrand J, Scherag A, Hinney A. Genome-wide analysis of rare copy number variations reveals PARK2 as a candidate gene for attention-deficit/hyperactivity disorder. Mol Psychiatry 2014; 19:115-21. [PMID: 23164820 PMCID: PMC3873032 DOI: 10.1038/mp.2012.161] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 09/21/2012] [Accepted: 10/09/2012] [Indexed: 12/12/2022]
Abstract
Attention-deficit/hyperactivity disorder (ADHD) is a common, highly heritable neurodevelopmental disorder. Genetic loci have not yet been identified by genome-wide association studies. Rare copy number variations (CNVs), such as chromosomal deletions or duplications, have been implicated in ADHD and other neurodevelopmental disorders. To identify rare (frequency ≤1%) CNVs that increase the risk of ADHD, we performed a whole-genome CNV analysis based on 489 young ADHD patients and 1285 adult population-based controls and identified one significantly associated CNV region. In tests for a global burden of large (>500 kb) rare CNVs, we observed a nonsignificant (P=0.271) 1.126-fold enriched rate of subjects carrying at least one such CNV in the group of ADHD cases. Locus-specific tests of association were used to assess if there were more rare CNVs in cases compared with controls. Detected CNVs, which were significantly enriched in the ADHD group, were validated by quantitative (q)PCR. Findings were replicated in an independent sample of 386 young patients with ADHD and 781 young population-based healthy controls. We identified rare CNVs within the parkinson protein 2 gene (PARK2) with a significantly higher prevalence in ADHD patients than in controls (P=2.8 × 10(-4) after empirical correction for genome-wide testing). In total, the PARK2 locus (chr 6: 162 659 756-162 767 019) harboured three deletions and nine duplications in the ADHD patients and two deletions and two duplications in the controls. By qPCR analysis, we validated 11 of the 12 CNVs in ADHD patients (P=1.2 × 10(-3) after empirical correction for genome-wide testing). In the replication sample, CNVs at the PARK2 locus were found in four additional ADHD patients and one additional control (P=4.3 × 10(-2)). Our results suggest that copy number variants at the PARK2 locus contribute to the genetic susceptibility of ADHD. Mutations and CNVs in PARK2 are known to be associated with Parkinson disease.
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Affiliation(s)
- I Jarick
- Institute of Medical Biometry and Epidemiology, University of Marburg, Marburg, Germany
| | - A-L Volckmar
- Department of Child and Adolescent Psychiatry, University of Duisburg-Essen, Essen, Germany
| | - C Pütter
- Institute for Medical Informatics, Biometry and Epidemiology (IMIBE), University of Duisburg-Essen, Essen, Germany
| | - S Pechlivanis
- Institute for Medical Informatics, Biometry and Epidemiology (IMIBE), University of Duisburg-Essen, Essen, Germany
| | - T T Nguyen
- Institute of Medical Biometry and Epidemiology, University of Marburg, Marburg, Germany
| | - M R Dauvermann
- Department of Child and Adolescent Psychiatry, University of Duisburg-Essen, Essen, Germany,University Hospital of Child and Adolescent Psychiatry, University of Bern, Bern, Switzerland
| | - S Beck
- Department of Child and Adolescent Psychiatry, University of Duisburg-Essen, Essen, Germany
| | - Ö Albayrak
- Department of Child and Adolescent Psychiatry, University of Duisburg-Essen, Essen, Germany
| | - S Scherag
- Department of Child and Adolescent Psychiatry, University of Duisburg-Essen, Essen, Germany
| | - S Gilsbach
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, RWTH Aachen University Clinics, Aachen, Germany
| | - S Cichon
- Institute of Neuroscience and Medicine (INM-1), Structural and Functional Organization of the Brain, Genomic Imaging, Research Center Juelich, Juelich, Germany,Institute of Human Genetics, University of Bonn, Bonn, Germany,Deptartment of Genomics, Life and Brain Center, University of Bonn, Bonn, Germany
| | - P Hoffmann
- Institute of Human Genetics, University of Bonn, Bonn, Germany,Deptartment of Genomics, Life and Brain Center, University of Bonn, Bonn, Germany
| | - F Degenhardt
- Institute of Human Genetics, University of Bonn, Bonn, Germany,Deptartment of Genomics, Life and Brain Center, University of Bonn, Bonn, Germany
| | - M M Nöthen
- Institute of Human Genetics, University of Bonn, Bonn, Germany,Deptartment of Genomics, Life and Brain Center, University of Bonn, Bonn, Germany,German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - S Schreiber
- Institute of Clinical Molecular Biology, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - H-E Wichmann
- Institute of Epidemiology, German Research Center for Environmental Health, Helmholtz Center Munich, Neuherberg, Germany
| | - K-H Jöckel
- Institute for Medical Informatics, Biometry and Epidemiology (IMIBE), University of Duisburg-Essen, Essen, Germany
| | - J Heinrich
- Institute of Epidemiology, German Research Center for Environmental Health, Helmholtz Center Munich, Neuherberg, Germany
| | - C M T Tiesler
- Institute of Epidemiology, German Research Center for Environmental Health, Helmholtz Center Munich, Neuherberg, Germany,Division of Metabolic Diseases and Nutritional Medicine, Dr von Hauner Children's Hospital, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - S V Faraone
- Departments of Psychiatry and of Neuroscience and Physiology, SUNY Upstate Medical University, Syracuse, NY, USA
| | - S Walitza
- Department of Child and Adolescent Psychiatry, University of Zurich, Zurich, Switzerland
| | - J Sinzig
- Department for Child and Adolescent Psychiatry, University of Cologne, Cologne, Germany,Department for Child and Adolescent Psychiatry and Psychotherapy, LVR—clinic Bonn, Bonn, Germany
| | - C Freitag
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, JW Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany
| | - J Meyer
- Department of Neurobehavioral Genetics, Institute of Psychobiology, University of Trier, Trier, Germany
| | - B Herpertz-Dahlmann
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, RWTH Aachen University Clinics, Aachen, Germany
| | - G Lehmkuhl
- Department for Child and Adolescent Psychiatry, University of Cologne, Cologne, Germany
| | - T J Renner
- Department of Child and Adolescent Psychiatry, University of Wuerzburg, Wuerzburg, Germany
| | - A Warnke
- Department of Child and Adolescent Psychiatry, University of Wuerzburg, Wuerzburg, Germany
| | - M Romanos
- Department of Child and Adolescent Psychiatry, University of Wuerzburg, Wuerzburg, Germany,Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Munich, Munich, Germany
| | - K-P Lesch
- Department of Psychiatry, Psychosomatics and Psychotherapy, Division of Molecular Psychiatry, ADHD Clinical Research Network, Laboratory of Translational Neuroscience, University of Wuerzburg, Wuerzburg, Germany,Department of Neuroscience, School for Mental Health and Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - A Reif
- Department of Psychiatry, Psychosomatics and Psychotherapy, University of Wuerzburg, Wuerzburg, Germany
| | - B G Schimmelmann
- Department of Child and Adolescent Psychiatry, University of Duisburg-Essen, Essen, Germany,University Hospital of Child and Adolescent Psychiatry, University of Bern, Bern, Switzerland
| | - J Hebebrand
- Department of Child and Adolescent Psychiatry, University of Duisburg-Essen, Essen, Germany
| | - A Scherag
- Institute for Medical Informatics, Biometry and Epidemiology (IMIBE), University of Duisburg-Essen, Essen, Germany
| | - A Hinney
- Department of Child and Adolescent Psychiatry, University of Duisburg-Essen, Essen, Germany,Department of Child and Adolescent Psychiatry, University of Dusiburg-Essen, Virchowstraße 174, D-45147 Essen, Germany. E-mail:
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He BJ, Nolte G, Nagata K, Takano D, Yamazaki T, Fujimaki Y, Maeda T, Satoh Y, Heckers S, George MS, Lopes da Silva F, de Munck JC, Van Houdt PJ, Verdaasdonk RM, Ossenblok P, Mullinger K, Bowtell R, Bagshaw AP, Keeser D, Karch S, Segmiller F, Hantschk I, Berman A, Padberg F, Pogarell O, Scharnowski F, Karch S, Hümmer S, Keeser D, Paolini M, Kirsch V, Koller G, Rauchmann B, Kupka M, Blautzik J, Pogarell O, Razavi N, Jann K, Koenig T, Kottlow M, Hauf M, Strik W, Dierks T, Gotman J, Vulliemoz S, Lu Y, Zhang H, Yang L, Worrell G, He B, Gruber O, Piguet C, Hubl D, Homan P, Kindler J, Dierks T, Kim K, Steinhoff U, Wakai R, Koenig T, Kottlow M, Melie-García L, Mucci A, Volpe U, Prinster A, Salvatore M, Galderisi S, Linden DEJ, Brandeis D, Schroeder CE, Kayser C, Panzeri S, Kleinschmidt A, Ritter P, Walther S, Haueisen J, Lau S, Flemming L, Sonntag H, Maess B, Knösche TR, Lanfer B, Dannhauer M, Wolters CH, Stenroos M, Haueisen J, Wolters C, Aydin U, Lanfer B, Lew S, Lucka F, Ruthotto L, Vorwerk J, Wagner S, Ramon C, Guan C, Ang KK, Chua SG, Kuah WK, Phua KS, Chew E, Zhou H, Chuang KH, Ang BT, Wang C, Zhang H, Yang H, Chin ZY, Yu H, Pan Y, Collins L, Mainsah B, Colwell K, Morton K, Ryan D, Sellers E, Caves K, Throckmorton S, Kübler A, Holz EM, Zickler C, Sellers E, Ryan D, Brown K, Colwell K, Mainsah B, Caves K, Throckmorton S, Collins L, Wennberg R, Ahlfors SP, Grova C, Chowdhury R, Hedrich T, Heers M, Zelmann R, Hall JA, Lina JM, Kobayashi E, Oostendorp T, van Dam P, Oosterhof P, Linnenbank A, Coronel R, van Dessel P, de Bakker J, Rossion B, Jacques C, Witthoft N, Weiner KS, Foster BL, Miller KJ, Hermes D, Parvizi J, Grill-Spector K, Recanzone GH, Murray MM, Haynes JD, Richiardi J, Greicius M, De Lucia M, Müller KR, Formisano E, Smieskova R, Schmidt A, Bendfeldt K, Walter A, Riecher-Rössler A, Borgwardt S, Fusar-Poli P, Eliez S, Schmidt A, Sekihara K, Nagarajan SS, Schoffelen JM, Guggisberg AG, Nolte G, Balazs S, Kermanshahi K, Kiesenhofer W, Binder H, Rattay F, Antal A, Chaieb L, Paulus W, Bodis-Wollner I, Maurer K, Fein G, Camchong J, Johnstone J, Cardenas-Nicolson V, Fiederer LDJ, Lucka F, Yang S, Vorwerk J, Dümpelmann M, Cosandier-Rimélé D, Schulze-Bonhage A, Aertsen A, Speck O, Wolters CH, Ball T, Fuchs M, Wagner M, Kastner J, Tech R, Dinh C, Haueisen J, Baumgarten D, Hämäläinen MS, Lau S, Vogrin SJ, D'Souza W, Haueisen J, Cook MJ, Custo A, Van De Ville D, Vulliemoz S, Grouiller F, Michel CM, Malmivuo J, Aydin U, Vorwerk J, Küpper P, Heers M, Kugel H, Wellmer J, Kellinghaus C, Scherg M, Rampp S, Wolters C, Storti SF, Boscolo Galazzo I, Del Felice A, Pizzini FB, Arcaro C, Formaggio E, Mai R, Manganotti P, Koessler L, Vignal J, Cecchin T, Colnat-Coulbois S, Vespignani H, Ramantani G, Maillard L, Rektor I, Kuba R, Brázdil M, Chrastina J, Rektorova I, van Mierlo P, Carrette E, Strobbe G, Montes-Restrepo V, Vonck K, Vandenberghe S, Ahmed B, Brodely C, Carlson C, Kuzniecky R, Devinsky O, French J, Thesen T, Bénis D, David O, Lachaux JP, Seigneuret E, Krack P, Fraix V, Chabardès S, Bastin J, Jann K, Gee D, Kilroy E, Cannon T, Wang DJ, Hale JR, Mayhew SD, Przezdzik I, Arvanitis TN, Bagshaw AP, Plomp G, Quairiaux C, Astolfi L, Michel CM, Mayhew SD, Mullinger KJ, Bagshaw AP, Bowtell R, Francis ST, Schouten AC, Campfens SF, van der Kooij H, Koles Z, Lind J, Flor-Henry P, Wirth M, Haase CM, Villeneuve S, Vogel J, Jagust WJ, Kambeitz-Ilankovic L, Simon-Vermot L, Gesierich B, Duering M, Ewers M, Rektorova I, Krajcovicova L, Marecek R, Mikl M, Bracht T, Horn H, Strik W, Federspiel A, Schnell S, Höfle O, Stegmayer K, Wiest R, Dierks T, Müller TJ, Walther S, Surmeli T, Ertem A, Eralp E, Kos IH, Skrandies W, Flüggen S, Klein A, Britz J, Díaz Hernàndez L, Ro T, Michel CM, Lenartowicz A, Lau E, Rodriguez C, Cohen MS, Loo SK, Di Lorenzo G, Pagani M, Monaco L, Daverio A, Giannoudas I, La Porta P, Verardo AR, Niolu C, Fernandez I, Siracusano A, Flor-Henry P, Lind J, Koles Z, Bollmann S, Ghisleni C, O'Gorman R, Poil SS, Klaver P, Michels L, Martin E, Ball J, Eich-Höchli D, Brandeis D, Salisbury DF, Murphy TK, Butera CD, Mathalon DH, Fryer SL, Kiehl KA, Calhoun VC, Pearlson GD, Roach BJ, Ford JM, McGlashan TH, Woods SW, Volpe U, Merlotti E, Vignapiano A, Montefusco V, Plescia GM, Gallo O, Romano P, Mucci A, Galderisi S, Mingoia G, Langbein K, Dietzek M, Wagner G, Smesny, Scherpiet S, Maitra R, Gaser C, Sauer H, Nenadic I, Gonzalez Andino S, Grave de Peralta Menendez R, Grave de Peralta Menendez R, Sanchez Vives M, Rebollo B, Gonzalez Andino S, Frølich L, Andersen TS, Mørup M, Belfiore P, Gargiulo P, Ramon C, Vanhatalo S, Cho JH, Vorwerk J, Wolters CH, Knösche TR, Watanabe T, Kawabata Y, Ukegawa D, Kawabata S, Adachi Y, Sekihara K, Sekihara K, Nagarajan SS, Wagner S, Aydin U, Vorwerk J, Herrmann C, Burger M, Wolters C, Lucka F, Aydin U, Vorwerk J, Burger M, Wolters C, Bauer M, Trahms L, Sander T, Faber PL, Lehmann D, Gianotti LRR, Pascual-Marqui RD, Milz P, Kochi K, Kaneko S, Yamashita S, Yana K, Kalogianni K, Vardy AN, Schouten AC, van der Helm FCT, Sorrentino A, Luria G, Aramini R, Hunold A, Funke M, Eichardt R, Haueisen J, Gómez-Aguilar F, Vázquez-Olvera S, Cordova-Fraga T, Castro-López J, Hernández-Gonzalez MA, Solorio-Meza S, Sosa-Aquino M, Bernal-Alvarado JJ, Vargas-Luna M, Vorwerk J, Magyari L, Ludewig J, Oostenveld R, Wolters CH, Vorwerk J, Engwer C, Ludewig J, Wolters C, Sato K, Nishibe T, Furuya M, Yamashiro K, Yana K, Ono T, Puthanmadam Subramaniyam N, Hyttinen J, Lau S, Güllmar D, Flemming L, Haueisen J, Sonntag H, Vorwerk J, Wolters CH, Grasedyck L, Haueisen J, Maeß B, Freitag S, Graichen U, Fiedler P, Strohmeier D, Haueisen J, Stenroos M, Hauk O, Grigutsch M, Felber M, Maess B, Herrmann B, Strobbe G, van Mierlo P, Vandenberghe S, Strobbe G, Cárdenas-Peña D, Montes-Restrepo V, van Mierlo P, Castellanos-Dominguez G, Vandenberghe S, Lanfer B, Paul-Jordanov I, Scherg M, Wolters CH, Ito Y, Sato D, Kamada K, Kobayashi T, Dalal SS, Rampp S, Willomitzer F, Arold O, Fouladi-Movahed S, Häusler G, Stefan H, Ettl S, Zhang S, Zhang Y, Li H, Kong X, Montes-Restrepo V, Strobbe G, van Mierlo P, Vandenberghe S, Wong DDE, Bidet-Caulet A, Knight RT, Crone NE, Dalal SS, Birot G, Spinelli L, Vulliémoz S, Seeck M, Michel CM, Emory H, Wells C, Mizrahi N, Vogrin SJ, Lau S, Cook MJ, Karahanoglu FI, Grouiller F, Caballero-Gaudes C, Seeck M, Vulliemoz S, Van De Ville D, Spinelli L, Megevand P, Genetti M, Schaller K, Michel C, Vulliemoz S, Seeck M, Genetti M, Tyrand R, Grouiller F, Vulliemoz S, Spinelli L, Seeck M, Schaller K, Michel CM, Grouiller F, Heinzer S, Delattre B, Lazeyras F, Spinelli L, Pittau F, Seeck M, Ratib O, Vargas M, Garibotto V, Vulliemoz S, Vogrin SJ, Bailey CA, Kean M, Warren AE, Davidson A, Seal M, Harvey AS, Archer JS, Papadopoulou M, Leite M, van Mierlo P, Vonck K, Boon P, Friston K, Marinazzo D, Ramon C, Holmes M, Koessler L, Rikir E, Gavaret M, Bartolomei F, Vignal JP, Vespignani H, Maillard L, Centeno M, Perani S, Pier K, Lemieux L, Clayden J, Clark C, Pressler R, Cross H, Carmichael DW, Spring A, Bessemer R, Pittman D, Aghakhani Y, Federico P, Pittau F, Grouiller F, Vulliémoz S, Gotman J, Badier JM, Bénar CG, Bartolomei F, Cruto C, Chauvel P, Gavaret M, Brodbeck V, van Leeuwen T, Tagliazzuchi E, Melloni L, Laufs H, Griskova-Bulanova I, Dapsys K, Klein C, Hänggi J, Jäncke L, Ehinger BV, Fischer P, Gert AL, Kaufhold L, Weber F, Marchante Fernandez M, Pipa G, König P, Sekihara K, Hiyama E, Koga R, Iannilli E, Michel CM, Bartmuss AL, Gupta N, Hummel T, Boecker R, Holz N, Buchmann AF, Blomeyer D, Plichta MM, Wolf I, Baumeister S, Meyer-Lindenberg A, Banaschewski T, Brandeis D, Laucht M, Natahara S, Ueno M, Kobayashi T, Kottlow M, Bänninger A, Koenig T, Schwab S, Koenig T, Federspiel A, Dierks T, Jann K, Natsukawa H, Kobayashi T, Tüshaus L, Koenig T, Kottlow M, Achermann P, Wilson RS, Mayhew SD, Assecondi S, Arvanitis TN, Bagshaw AP, Darque A, Rihs TA, Grouiller F, Lazeyras F, Ha-Vinh Leuchter R, Caballero C, Michel CM, Hüppi PS, Hauser TU, Hunt LT, Iannaccone R, Stämpfli P, Brandeis D, Dolan RJ, Walitza S, Brem S, Graichen U, Eichardt R, Fiedler P, Strohmeier D, Freitag S, Zanow F, Haueisen J, Lordier L, Grouiller F, Van de Ville D, Sancho Rossignol A, Cordero I, Lazeyras F, Ansermet F, Hüppi P, Schläpfer A, Rubia K, Brandeis D, Di Lorenzo G, Pagani M, Monaco L, Daverio A, Giannoudas I, Verardo AR, La Porta P, Niolu C, Fernandez I, Siracusano A, Tamura K, Karube C, Mizuba T, Matsufuji M, Takashima S, Iramina K, Assecondi S, Ostwald D, Bagshaw AP, Marecek R, Brazdil M, Lamos M, Slavícek T, Marecek R, Jan J, Meier NM, Perrig W, Koenig T, Minami T, Noritake Y, Nakauchi S, Azuma K, Minami T, Nakauchi S, Rodriguez C, Lenartowicz A, Cohen MS, Rodriguez C, Lenartowicz A, Cohen MS, Iramina K, Kinoshita H, Tamura K, Karube C, Kaneko M, Ide J, Noguchi Y, Cohen MS, Douglas PK, Rodriguez CM, Xia HJ, Zimmerman EM, Konopka CJ, Epstein PS, Konopka LM, Giezendanner S, Fisler M, Soravia L, Andreotti J, Wiest R, Dierks T, Federspiel A, Razavi N, Federspiel A, Dierks T, Hauf M, Jann K, Kamada K, Sato D, Ito Y, Okano K, Mizutani N, Kobayashi T, Thelen A, Murray M, Pastena L, Formaggio E, Storti SF, Faralli F, Melucci M, Gagliardi R, Ricciardi L, Ruffino G, Coito A, Macku P, Tyrand R, Astolfi L, He B, Wiest R, Seeck M, Michel C, Plomp G, Vulliemoz S, Fischmeister FPS, Glaser J, Schöpf V, Bauer H, Beisteiner R, Deligianni F, Centeno M, Carmichael DW, Clayden J, Mingoia G, Langbein K, Dietzek M, Wagner G, Smesny S, Scherpiet S, Maitra R, Gaser C, Sauer H, Nenadic I, Dürschmid S, Zaehle T, Pannek H, Chang HF, Voges J, Rieger J, Knight RT, Heinze HJ, Hinrichs H, Tsatsishvili V, Cong F, Puoliväli T, Alluri V, Toiviainen P, Nandi AK, Brattico E, Ristaniemi T, Grieder M, Crinelli RM, Jann K, Federspiel A, Wirth M, Koenig T, Stein M, Wahlund LO, Dierks T, Atsumori H, Yamaguchi R, Okano Y, Sato H, Funane T, Sakamoto K, Kiguchi M, Tränkner A, Schindler S, Schmidt F, Strauß M, Trampel R, Hegerl U, Turner R, Geyer S, Schönknecht P, Kebets V, van Assche M, Goldstein R, van der Meulen M, Vuilleumier P, Richiardi J, Van De Ville D, Assal F, Wozniak-Kwasniewska A, Szekely D, Harquel S, Bougerol T, David O, Bracht T, Jones DK, Horn H, Müller TJ, Walther S, Sos P, Klirova M, Novak T, Brunovsky M, Horacek J, Bares M, Hoschl C C, Fellhauer I, Zöllner FG, Schröder J, Kong L, Essig M, Schad LR, Arrubla J, Neuner I, Hahn D, Boers F, Shah NJ, Neuner I, Arrubla J, Hahn D, Boers F, Jon Shah N, Suriya Prakash M, Sharma R, Kawaguchi H, Kobayashi T, Fiedler P, Griebel S, Biller S, Fonseca C, Vaz F, Zentner L, Zanow F, Haueisen J, Rochas V, Rihs T, Thut G, Rosenberg N, Landis T, Michel C, Moliadze V, Schmanke T, Lyzhko E, Bassüner S, Freitag C, Siniatchkin M, Thézé R, Guggisberg AG, Nahum L, Schnider A, Meier L, Friedrich H, Jann K, Landis B, Wiest R, Federspiel A, Strik W, Dierks T, Witte M, Kober SE, Neuper C, Wood G, König R, Matysiak A, Kordecki W, Sieluzycki C, Zacharias N, Heil P, Wyss C, Boers F, Arrubla J, Dammers J, Kawohl W, Neuner I, Shah NJ, Braboszcz C, Cahn RB, Levy J, Fernandez M, Delorme A, Rosas-Martinez L, Milne E, Zheng Y, Urakami Y, Kawamura K, Washizawa Y, Hiyoshi K, Cichocki A, Giroud N, Dellwo V, Meyer M, Rufener KS, Liem F, Dellwo V, Meyer M, Jones-Rounds JD, Raizada R, Staljanssens W, Strobbe G, van Mierlo P, Van Holen R, Vandenberghe S, Pefkou M, Becker R, Michel C, Hervais-Adelman A, He W, Brock J, Johnson B, Ohla K, Hitz K, Heekeren K, Obermann C, Huber T, Juckel G, Kawohl W, Gabriel D, Comte A, Henriques J, Magnin E, Grigoryeva L, Ortega JP, Haffen E, Moulin T, Pazart L, Aubry R, Kukleta M, Baris Turak B, Louvel J, Crespo-Garcia M, Cantero JL, Atienza M, Connell S, Kilborn K, Damborská A, Brázdil M, Rektor I, Kukleta M, Koberda JL, Bienkiewicz A, Koberda I, Koberda P, Moses A, Tomescu M, Rihs T, Britz J, Custo A, Grouiller F, Schneider M, Debbané M, Eliez S, Michel C, Wang GY, Kydd R, Wouldes TA, Jensen M, Russell BR, Dissanayaka N, Au T, Angwin A, O'Sullivan J, Byrne G, Silburn P, Marsh R, Mellic G, Copland D, Bänninger A, Kottlow M, Díaz Hernàndez L, Koenig T, Díaz Hernàndez L, Bänninger A, Koenig T, Hauser TU, Iannaccone R, Mathys C, Ball J, Drechsler R, Brandeis D, Walitza S, Brem S, Boeijinga PH, Pang EW, Valica T, Macdonald MJ, Oh A, Lerch JP, Anagnostou E, Di Lorenzo G, Pagani M, Monaco L, Daverio A, Verardo AR, Giannoudas I, La Porta P, Niolu C, Fernandez I, Siracusano A, Shimada T, Matsuda Y, Monkawa A, Monkawa T, Hashimoto R, Watanabe K, Kawasaki Y, Matsuda Y, Shimada T, Monkawa T, Monkawa A, Watanabe K, Kawasaki Y, Stegmayer K, Horn H, Federspiel A, Razavi N, Bracht T, Laimböck K, Strik W, Dierks T, Wiest R, Müller TJ, Walther S, Koorenhof LJ, Swithenby SJ, Martins-Mourao A, Rihs TA, Tomescu M, Song KW, Custo A, Knebel JF, Murray M, Eliez S, Michel CM, Volpe U, Merlotti E, Vignapiano A, Montefusco V, Plescia GM, Gallo O, Romano P, Mucci A, Galderisi S, Laimboeck K, Jann K, Walther S, Federspiel A, Wiest R, Strik W, Horn H. Abstracts of Presentations at the International Conference on Basic and Clinical Multimodal Imaging (BaCI), a Joint Conference of the International Society for Neuroimaging in Psychiatry (ISNIP), the International Society for Functional Source Imaging (ISFSI), the International Society for Bioelectromagnetism (ISBEM), the International Society for Brain Electromagnetic Topography (ISBET), and the EEG and Clinical Neuroscience Society (ECNS), in Geneva, Switzerland, September 5-8, 2013. Clin EEG Neurosci 2013; 44:1550059413507209. [PMID: 24368763 DOI: 10.1177/1550059413507209] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- B J He
- National Institutes of Health, Bethesda, MD, USA
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Greffier J, Fernandez A, Macri F, Freitag C, Metge L, Beregi JP. Which dose for what image? Iterative reconstruction for CT scan. Diagn Interv Imaging 2013; 94:1117-21. [DOI: 10.1016/j.diii.2013.03.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Raabe O, Shell K, Fietz D, Freitag C, Ohrndorf A, Christ HJ, Wenisch S, Arnhold S. Tenogenic differentiation of equine adipose-tissue-derived stem cells under the influence of tensile strain, growth differentiation factors and various oxygen tensions. Cell Tissue Res 2013; 352:509-21. [DOI: 10.1007/s00441-013-1574-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Accepted: 01/13/2013] [Indexed: 01/02/2023]
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Hyvärinen L, Walthes R, Freitag C, Petz V. Profile of Visual Functioning as a Bridge between Education and Medicine in the Assessment of Impaired Vision. Strabismus 2012; 20:63-8. [DOI: 10.3109/09273972.2012.680235] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Bodenmann S, Hohoff C, Freitag C, Deckert J, Rétey JV, Bachmann V, Landolt HP. Polymorphisms of ADORA2A modulate psychomotor vigilance and the effects of caffeine on neurobehavioural performance and sleep EEG after sleep deprivation. Br J Pharmacol 2012; 165:1904-1913. [PMID: 21950736 PMCID: PMC3372839 DOI: 10.1111/j.1476-5381.2011.01689.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2011] [Revised: 08/10/2011] [Accepted: 08/30/2011] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND AND PURPOSE Prolonged wakefulness impairs sustained vigilant attention, measured with the psychomotor vigilance task (PVT), and induces a compensatory increase in sleep intensity in recovery sleep, quantified by slow-wave activity (SWA) in the sleep electroencephalogram (EEG). These effects of sleep deprivation are counteracted by the adenosine receptor antagonist caffeine, implying involvement of the adenosine neuromodulator/receptor system. To examine a role for adenosine A(2A) receptors, we investigated whether variation of the A(2A) receptor gene (ADORA2A) modified effects of caffeine on PVT and SWA after sleep deprivation. EXPERIMENTAL APPROACH A haplotype analysis of eight single-nucleotide polymorphisms of ADORA2A was performed in 82 volunteers. In 45 young men carrying five different allele combinations, we investigated the effects of prolonged waking and 2 × 200 mg caffeine or 2 × 100 mg modafinil on psychomotor vigilance, sleepiness, and the waking and sleep EEG. KEY RESULTS Throughout extended wakefulness, the carriers of haplotype HT4 performed faster on the PVT than carriers of non-HT4 haplotype alleles. In haplotype HT4, caffeine failed to counteract the waking-induced impairment of PVT performance and the rebound of SWA in recovery sleep. However, caffeine was effective in non-HT4 allele carriers, and modafinil reduced the consequences of prolonged waking, independently of ADORA2A haplotype. CONCLUSIONS AND IMPLICATIONS Common genetic variation of ADORA2A is an important determinant of psychomotor vigilance in rested and sleep-deprived state. It also modulates individual responses to caffeine after sleep deprivation. These findings demonstrate a role for adenosine A(2A) receptors in the effects of prolonged wakefulness on vigilant attention and the sleep EEG.
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Affiliation(s)
- S Bodenmann
- Institute of Pharmacology and Toxicology, University of Zürich, Zürich, SwitzerlandDepartment of Psychiatry, University of Münster, Münster, GermanyDepartment of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Johann-Wolfgang Goethe University, Frankfurt am Main, GermanyDepartment of Psychiatry, University of Würzburg, Würzburg, GermanyZürich Center for Integrative Human Physiology, University of Zürich, Zürich, Switzerland
| | - C Hohoff
- Institute of Pharmacology and Toxicology, University of Zürich, Zürich, SwitzerlandDepartment of Psychiatry, University of Münster, Münster, GermanyDepartment of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Johann-Wolfgang Goethe University, Frankfurt am Main, GermanyDepartment of Psychiatry, University of Würzburg, Würzburg, GermanyZürich Center for Integrative Human Physiology, University of Zürich, Zürich, Switzerland
| | - C Freitag
- Institute of Pharmacology and Toxicology, University of Zürich, Zürich, SwitzerlandDepartment of Psychiatry, University of Münster, Münster, GermanyDepartment of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Johann-Wolfgang Goethe University, Frankfurt am Main, GermanyDepartment of Psychiatry, University of Würzburg, Würzburg, GermanyZürich Center for Integrative Human Physiology, University of Zürich, Zürich, Switzerland
| | - J Deckert
- Institute of Pharmacology and Toxicology, University of Zürich, Zürich, SwitzerlandDepartment of Psychiatry, University of Münster, Münster, GermanyDepartment of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Johann-Wolfgang Goethe University, Frankfurt am Main, GermanyDepartment of Psychiatry, University of Würzburg, Würzburg, GermanyZürich Center for Integrative Human Physiology, University of Zürich, Zürich, Switzerland
| | - J V Rétey
- Institute of Pharmacology and Toxicology, University of Zürich, Zürich, SwitzerlandDepartment of Psychiatry, University of Münster, Münster, GermanyDepartment of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Johann-Wolfgang Goethe University, Frankfurt am Main, GermanyDepartment of Psychiatry, University of Würzburg, Würzburg, GermanyZürich Center for Integrative Human Physiology, University of Zürich, Zürich, Switzerland
| | - V Bachmann
- Institute of Pharmacology and Toxicology, University of Zürich, Zürich, SwitzerlandDepartment of Psychiatry, University of Münster, Münster, GermanyDepartment of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Johann-Wolfgang Goethe University, Frankfurt am Main, GermanyDepartment of Psychiatry, University of Würzburg, Würzburg, GermanyZürich Center for Integrative Human Physiology, University of Zürich, Zürich, Switzerland
| | - H-P Landolt
- Institute of Pharmacology and Toxicology, University of Zürich, Zürich, SwitzerlandDepartment of Psychiatry, University of Münster, Münster, GermanyDepartment of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Johann-Wolfgang Goethe University, Frankfurt am Main, GermanyDepartment of Psychiatry, University of Würzburg, Würzburg, GermanyZürich Center for Integrative Human Physiology, University of Zürich, Zürich, Switzerland
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Schimmelmann BG, Friedel S, Nguyen TT, Sauer S, Ganz Vogel CI, Konrad K, Wilhelm C, Sinzig J, Renner TJ, Romanos M, Palmason H, Dempfle A, Walitza S, Freitag C, Meyer J, Linder M, Schäfer H, Warnke A, Lesch KP, Herpertz-Dahlman B, Hinney A, Hebebrand J. Exploring the genetic link between RLS and ADHD. J Psychiatr Res 2009; 43:941-5. [PMID: 19223043 DOI: 10.1016/j.jpsychires.2009.01.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2008] [Revised: 01/13/2009] [Accepted: 01/13/2009] [Indexed: 01/27/2023]
Abstract
Attention deficit/hyperactivity disorder (ADHD) is a highly heritable neurodevelopmental disorder of childhood onset. Clinical and biological evidence points to shared common central nervous system (CNS) pathology of ADHD and restless legs syndrome (RLS). It was hypothesized that variants previously found to be associated with RLS in two large genome-wide association studies (GWA), will also be associated with ADHD. SNPs located in MEIS1 (rs2300478), BTBD9 (rs9296249, rs3923809, rs6923737), and MAP2K5 (rs12593813, rs4489954) as well as three SNPs tagging the identified haplotype in MEIS1 (rs6710341, rs12469063, rs4544423) were genotyped in a well characterized German sample of 224 families comprising one or more affected sibs (386 children) and both parents. We found no evidence for preferential transmission of the hypothesized variants to ADHD. Subsequent analyses elicited nominal significant association with haplotypes consisting of the three SNPs in BTBD9 (chi2 = 14.8, df = 7, nominal p = 0.039). According to exploratory post hoc analyses, the major contribution to this finding came from the A-A-A-haplotype with a haplotype-wise nominal p-value of 0.009. However, this result did not withstand correction for multiple testing. In view of our results, RLS risk alleles may have a lower effect on ADHD than on RLS or may not be involved in ADHD. The negative findings may additionally result from genetic heterogeneity of ADHD, i.e. risk alleles for RLS may only be relevant for certain subtypes of ADHD. Genes relevant to RLS remain interesting candidates for ADHD; particularly BTBD9 needs further study, as it has been related to iron storage, a potential pathophysiological link between RLS and certain subtypes of ADHD.
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Affiliation(s)
- B G Schimmelmann
- Department of Child and Adolescent Psychiatry and Psychotherapy, University of Duisburg-Essen, LVR Klinikun Essen, Virchowstr. 174, 45147 Essen, Germany.
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Romanos M, Freitag C, Jacob C, Craig DW, Dempfle A, Nguyen TT, Halperin R, Walitza S, Renner TJ, Seitz C, Romanos J, Palmason H, Reif A, Heine M, Windemuth-Kieselbach C, Vogler C, Sigmund J, Warnke A, Schäfer H, Meyer J, Stephan DA, Lesch KP. Genome-wide linkage analysis of ADHD using high-density SNP arrays: novel loci at 5q13.1 and 14q12. Mol Psychiatry 2008; 13:522-30. [PMID: 18301393 DOI: 10.1038/mp.2008.12] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Previous genome-wide linkage studies applied the affected sib-pair design; one investigated extended pedigrees of a genetic isolate. Here, results of a genome-wide high-density linkage scan of attention-deficit/hyperactivity disorder (ADHD) using an array-based genotyping of approximately 50 K single nucleotide polymorphism (SNPs) markers are presented. We investigated eight extended pedigrees of German origin that were non-related, not part of a genetic isolate and ascertained on the basis of clinical referral. Two parametric analyses maximizing LOD scores (MOD) and a non-parametric analysis for both a broad and a narrow phenotype approach were conducted. Novel linkage loci across all families were detected at 2q35, 5q13.1, 6q22-23 and 14q12, within individual families at 18q11.2-12.3. Further linkage regions at 7q21.11, 9q22 and 16q24.1 in all families, and at 1q25.1, 1q25.3, 9q31.1-33.1, 9q33, 12p13.33, 15q11.2-13.3 and 16p12.3-12.2 in individual families replicate previous findings. High-resolution linkage mapping points to several novel candidate genes characterized by dense expression in the brain and potential impact on disorder-relevant synaptic transmission. Our study provides further evidence for common gene effects throughout different populations despite the complex multifactorial etiology of ADHD.
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Affiliation(s)
- M Romanos
- ADHD Clinical Research Program, Department of Child and Adolescent Psychiatry and Psychotherapy, University of Wuerzburg, Wuerzburg, Germany.
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17
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Retz W, Rösler M, Kissling C, Wiemann S, Hünnerkopf R, Coogan A, Thome J, Freitag C. Norepinephrine transporter and catecholamine-O-methyltransferase gene variants and attention-deficit/hyperactivity disorder symptoms in adults. J Neural Transm (Vienna) 2007; 115:323-9. [PMID: 17994190 DOI: 10.1007/s00702-007-0822-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2007] [Accepted: 09/10/2007] [Indexed: 11/25/2022]
Abstract
Attention deficit/hyperactivity disorder (ADHD) is a complex, highly heritable psychiatric condition. Neuropsychological and pharmacological studies suggest a dysregulation of central noradrenergic neurotransmission in addition to dopaminergic and serotonergic mechanisms. Only a few studies have focused on the association of noradrenergic susceptibility genes with ADHD. In this study, we investigated the association of several ADHD symptom scores (German short form of the Wender Utah Rating Scale, WURS-k; ADHD self report, ADHD-SB, and the German validated version of the WRAADDS, WRI) with haplotypes of the catechol-O-methyltransferase (COMT) and the norepinephrine transporter (SLC6A2) genes. Subjects were genotyped for three SLC6A2 (rs5569, rs998424, rs2242447) and two COMT single nucleotide polymorphisms (rs4680, rs4818). In addition, psychosocial adversity in childhood was assessed in order to evaluate putative gene-environment interactions. We did not find main effects of the COMT and SLC6A2 NET1 gene haplotypes on any ADHD symptom severity score. Childhood psychosocial adversity was strongly associated with number of ADHD symptoms. No gene-environment interaction was found. A specific combination of two COMT and SLC6A2 gene haplotypes, containing the low functioning COMT variant was nominally associated with low ADHD scores in all scales. Results do not support the hypothesis that common variants in the SLC6A2 and COMT genes in particular are associated with ADHD, but might give some evidence for interactive effects between these gene variants on ADHD severity.
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Affiliation(s)
- W Retz
- Institute for Forensic Psychology and Psychiatry, Saarland University Hospital, Homburg, Germany.
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18
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Friedel S, Saar K, Sauer S, Dempfle A, Walitza S, Renner T, Romanos M, Freitag C, Seitz C, Palmason H, Scherag A, Windemuth-Kieselbach C, Schimmelmann BG, Wewetzer C, Meyer J, Warnke A, Lesch KP, Reinhardt R, Herpertz-Dahlmann B, Linder M, Hinney A, Remschmidt H, Schäfer H, Konrad K, Hübner N, Hebebrand J. Association and linkage of allelic variants of the dopamine transporter gene in ADHD. Mol Psychiatry 2007; 12:923-33. [PMID: 17579611 DOI: 10.1038/sj.mp.4001986] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Previously, we had reported a genome-wide scan for attention-deficit/hyperactivity disorder (ADHD) in 102 families with affected sibs of German ancestry; the highest multipoint LOD score of 4.75 was obtained on chromosome 5p13 (parametric HLOD analysis under a dominant model) near the dopamine transporter gene (DAT1). We genotyped 30 single nucleotide polymorphisms (SNPs) in this candidate gene and its 5' region in 329 families (including the 102 initial families) with 523 affected offspring. We found that (1) SNP rs463379 was significantly associated with ADHD upon correction for multiple testing (P=0.0046); (2) the global P-value for association of haplotypes was significant for block two upon correction for all (n=3) tested blocks (P=0.0048); (3) within block two we detected a nominal P=0.000034 for one specific marker combination. This CGC haplotype showed relative risks of 1.95 and 2.43 for heterozygous and homozygous carriers, respectively; and (4) finally, our linkage data and the genotype-IBD sharing test (GIST) suggest that genetic variation at the DAT1 locus explains our linkage peak and that rs463379 (P<0.05) is the only SNP of the above haplotype that contributed to the linkage signal. In sum, we have accumulated evidence that genetic variation at the DAT1 locus underlies our ADHD linkage peak on chromosome 5; additionally solid association for a single SNP and a haplotype were shown. Future studies are required to assess if variation at this locus also explains other positive linkage results obtained for chromosome 5p.
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Affiliation(s)
- S Friedel
- Department of Child and Adolescent Psychiatry, University of Duisburg-Essen, Essen, Germany
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19
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Schimmelmann BG, Friedel S, Dempfle A, Warnke A, Lesch KP, Walitza S, Renner TJ, Romanos M, Herpertz-Dahlmann B, Linder M, Schäfer H, Seitz C, Palmason H, Freitag C, Meyer J, Konrad K, Hinney A, Hebebrand J. No evidence for preferential transmission of common valine allele of the Val66Met polymorphism of the brain-derived neurotrophic factor gene (BDNF) in ADHD. J Neural Transm (Vienna) 2007; 114:523-6. [PMID: 17219016 DOI: 10.1007/s00702-006-0616-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2006] [Accepted: 12/04/2006] [Indexed: 12/01/2022]
Abstract
Attention deficit/hyperactivity disorder (ADHD) is a highly heritable common neurodevelopmental disorder with onset in childhood. A coding SNP (rs6265, Val66Met) of the brain-derived neurotrophic factor gene (BDNF) has recently been associated with ADHD. More specifically, paternal over-transmission of the common Val66 allele to affected children had been observed. We aimed to confirm these findings in a large, sufficiently powered, and well characterized German ADHD family sample. The Val66Met polymorphism of BDNF was genotyped in 294 families comprising one or more affected sibs (468 children). Contrary to previous reports, we did not observe over-transmission of the common Val66 allele, from either parent to affected children. We did not find support for an involvement of the Val66 allele of the Val66Met polymorphism of BDNF in the pathogenesis of ADHD in our sample.
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Affiliation(s)
- B G Schimmelmann
- Department of Child and Adolescent Psychiatry, Rheinische Kliniken Essen, University of Duisburg-Essen, Essen, Germany
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20
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Schneider M, Retz W, Freitag C, Irsch J, Graf P, Retz-Junginger P, Rösler M. Impaired cortical inhibition in adult ADHD patients: a study with transcranial magnetic stimulation. J Neural Transm Suppl 2007:303-309. [PMID: 17982907 DOI: 10.1007/978-3-211-73574-9_37] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The aim of this study was to analyze motor inhibition and facilitation of adult ADHD patients using double pulse transcranial magnetic stimulation (TMS). Twenty-six right handed adult ADHD patients according to DSM-IV were investigated and compared to 26 age and sex-matched controls. In the left hemisphere, mean motor inhibition was 0.53 +/- 0.33 (mean +/- SD) in ADHD patients and 0.34 +/- 0.16 (mean +/- SD) in controls (p = 0.012). There were no significant differences in motor excitability concerning facilitation or in the right hemisphere. Decreased motor inhibition correlated with a higher symptom score derived from the Wender Reimherr Interview (WRI) (p = 0.28; p = 0.04) and also with self rated hyperactivity/impulsivity symptoms (p = 0.30; p = 0.03). In conclusion, decreased motor inhibition in adult ADHD corroborate similar findings in children with ADHD (Moll et al., 2000) and reflect disturbed impulsivity and hyperactivity on a neurophysiological level.
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Affiliation(s)
- M Schneider
- Institute for Forensic Psychology and Psychiatry, University of the Saarland, Homburg/Saar, Germany.
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21
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Leygraf A, Hohoff C, Freitag C, Willis-Owen SAG, Krakowitzky P, Fritze J, Franke P, Bandelow B, Fimmers R, Flint J, Deckert J. Rgs 2 gene polymorphisms as modulators of anxiety in humans? J Neural Transm (Vienna) 2006; 113:1921-5. [PMID: 16736243 DOI: 10.1007/s00702-006-0484-8] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2005] [Accepted: 02/15/2006] [Indexed: 10/24/2022]
Abstract
Rgs2 (regulator of G-protein signalling 2) gene recently was reported as a quantitative trait gene for anxious behaviour in mice and male Rgs2 knockout mice have been shown to be more anxious than wildtype mice. Therefore we investigated four non-coding single nucleotide polymorphisms in a sample of 173 patients with panic disorder and 173 matched controls of German descent. At the genotype level all four SNPs were associated with panic disorder (p = 0.02-0.05). At the haplotype level the strongest association was observed for a haplotype containing SNP3 and SNP 4 (subgroup men and men with agoraphobia: p = 0.01 and 0.03). This points towards a functional polymorphism at the 3' end of the gene. Our results support the hypothesis that variations of the Rgs2 gene play a role also for the development of anxiety in humans.
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Affiliation(s)
- A Leygraf
- Laboratory of Molecular Psychiatry, Department of Psychiatry, University of Münster, Münster, Germany
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22
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Freitag C, Besselmann S, Löffler E, Grünert W, Rosowski F, Muhler M. On the role of monomeric vanadyl species in toluene oxidation over V2O5/TiO2 catalysts: a kinetic study using the TAP reactor. Catal Today 2004. [DOI: 10.1016/j.cattod.2004.03.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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23
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Hösing VG, Schirmacher A, Kuhlenbäumer G, Freitag C, Sand P, Schlesiger C, Jacob C, Fritze J, Franke P, Rietschel M, Garritsen H, Nöthen MM, Fimmers R, Stögbauer F, Deckert J. Cholecystokinin- and cholecystokinin-B-receptor gene polymorphisms in panic disorder. Focus on Extrapyramidal Dysfunction 2004:147-56. [PMID: 15354400 DOI: 10.1007/978-3-7091-0579-5_17] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Panic disorder like other neuropsychiatric disorders is believed to be caused by multiple psychosocial and biological factors. Several lines of evidence point to a role for the peptide neurotransmitter cholecystokinin in the pathogenesis of panic disorder. We therefore determined the allele and genotype frequencies of a single nucleotide polymorphism in the CCK gene (-36C>T) and one CT repeat polymorphism in the CCK-B-receptor gene in a German panic disorder sample (n = 115 for CCK gene polymorphism, n = 111 for CCK-B-receptor polymorphism) and compared them with gender and age matched controls. The length of the polymorphic CT repeat alleles varies between 146 bp and 180 bp. We first analysed the results by a permutation test which provided evidence for heterogeneity between patients and controls (p=0.002). We then analysed the data as a di-allelic polymorphism with a short (146-162bp) and a long (164-180bp) allele and as a tetra-allelic polymorphism with 4 alleles (146-154bp, 156-162bp, 164-170bp, 172-180bp). In the di-allelic analysis as well as in the tetra-allelic analysis there was an excess of the longer allele (p = 0.001) or the two longer alleles (p = 0.041) respectively in patients with panic disorder. No difference between groups was observed for the -36C > T polymorphism. Our findings are consistent with the notion that genetic variation in the CCK neurotransmitter system contributes to the pathogenesis of panic disorder.
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Affiliation(s)
- V G Hösing
- Department of Psychiatry, University of Münster, Belgium
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24
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Desrosiers P, Carlson E, Chandler W, Chau H, Cong P, Doolen R, Freitag C, Lin S, Masui C, Wu E, Crevier T, Mullins D, Song L, Lou R, Zhan J, Tangkilisan A, Ung Q, Phan K. High throughput screening techniques for pre-formulation: salt selection and polymorph studies. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302085446] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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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25
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Ipatieef VN, Freitag C. Double Decomposition and Oxidation of Inorganic Compounds under Pressure Transformation of Heavy Spar into Barium Carbonate. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/ie50303a025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Eiermann TH, Sahm H, Freitag C, Zander AR. The effect of IgM-enriched human Ig and rabbit antithymocyte globulin on the stimulation of mononuclear cells. Scand J Immunol 2001; 54:626-9. [PMID: 11902339 DOI: 10.1046/j.1365-3083.2001.01023.x] [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: 11/20/2022]
Abstract
Whether IgM-enriched intravenous Ig (pentaglobin) is a useful adjunct treatment for graft versus host disease (GvHD) prophylaxis in allogeneic stem-cell transplantation is unclear. Clinical data with the use of a five-agent GvHD prevention regimen, including pentaglobin and antithymocyte globulin (ATG), are encouraging. In vitro both have been reported to modulate alloreactive T cells. We compared their inhibitory effect on the phytohemagglutinin-induced lymphocyte proliferation. ATG blocked the proliferation of lymphocytes at lower doses and much stronger than pentaglobin. The combination of both was not different from ATG alone. In pentaglobin, glucose used as stabiliser, caused the effect. Starting at a concentration of 40 mg/dL glucose, glucose alone showed a dose-dependent inhibition of phytohemaglutinin (PHA)-induced proliferation. For the in vivo application of pentaglobin, the results suggest that pentaglobin does not inhibit the proliferation of T cells.
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Affiliation(s)
- T H Eiermann
- Department of Transfusion Medicine, University Hospital Eppendorf, Hamburg, Germany.
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27
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Freitag C. [Not Available]. Koln Med Beitr 2001; 67:8-346. [PMID: 11640743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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28
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Besselmann S, Freitag C, Hinrichsen O, Muhler M. Temperature-programmed reduction and oxidation experiments with V2O5/TiO2 catalysts. Phys Chem Chem Phys 2001. [DOI: 10.1039/b105466j] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Freitag C, Chougnet C, Schito M, Near KA, Shearer GM, Li C, Langhorne J, Sher A. Malaria infection induces virus expression in human immunodeficiency virus transgenic mice by CD4 T cell-dependent immune activation. J Infect Dis 2001; 183:1260-8. [PMID: 11262209 DOI: 10.1086/319686] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2000] [Revised: 01/08/2001] [Indexed: 11/03/2022] Open
Abstract
To test the capacity of malaria parasites to trigger virus expression in vivo, human immunodeficiency virus (HIV) transgenic mice were infected with Plasmodium chabaudi chabaudi clone AS. Splenocytes recovered during peak parasitemia showed a dramatic elevation in viral p24 production that returned to baseline by day 15 and failed to rebound at recrudescence or after reinfection. The major sources of virus expression were antigen-presenting cells (APCs) rather than T lymphocytes. Nevertheless, T cells from infected mice stimulated with plasmodial antigen triggered 5-10-fold increases in p24 production from dendritic cells in vitro, which suggests that viral induction stems from interaction of malaria-specific T lymphocytes with HIV-expressing APCs. Indeed, depletion of CD4 T cells resulted in a 70% reduction in the p24 response stimulated by malaria in vivo. These findings demonstrate the ability of Plasmodium species to immunologically activate latently integrated HIV in vivo but suggest that this process may be restricted to acute infection.
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Affiliation(s)
- C Freitag
- Immunobiology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-0425, USA
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30
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Chougnet C, Freitag C, Schito M, Thomas EK, Sher A, Shearer GM. In vivo CD40-CD154 (CD40 ligand) interaction induces integrated HIV expression by APC in an HIV-1-transgenic mouse model. J Immunol 2001; 166:3210-7. [PMID: 11207274 DOI: 10.4049/jimmunol.166.5.3210] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Because of their relative resistance to viral cytopathic effects, APC can provide an alternative reservoir for latently integrated HIV. We used an HIV-transgenic mouse model in which APC serve as the major source of inducible HIV expression to study mechanisms by which integrated virus can be activated in these cells. When admixed with transgenic APC, activated T lymphocytes provided a major contact-dependent stimulus for viral protein expression in vitro. Using blocking anti-CD154 mAb as well as CD154-deficient T cells, the HIV response induced by activated T lymphocytes was demonstrated to require CD40-CD154 interaction. The role of this pathway in the induction of HIV expression from APC in vivo was further studied in an experimental model involving infection of the HIV-transgenic mice with PLASMODIUM: chabaudi parasites. Enhanced viral production by dendritic cells and macrophages in infected mice was associated with up-regulated CD40 expression. More importantly, in vivo treatment with blocking anti-CD154 mAb markedly reduced viral expression in P. chabaudi-infected animals. Together, these findings indicate that immune activation of integrated HIV can be driven by the costimulatory interaction of activated T cells with APC. Because chronic T cell activation driven by coinfections as well as HIV-1 itself is a characteristic of HIV disease, this pathway may be important in sustaining viral expression from APC reservoirs.
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Affiliation(s)
- C Chougnet
- Experimental Immunology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
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31
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Pilch H, Günzel S, Freitag C, Schäffer U, Tanner B, Knapstein PG, Maeurer M. Expansion of the CD8 + CD45RA + CD27 - CD28 - T-Cell Subset in Patients with HPV-Associated Cervical Cancer and its Precursors - Anstieg der CD8 + CD45RA + CD27 - CD 28 - T-Zell-Subpopulation bei Patientinnen mit HPV-assoziiertem Zervixkarzinom und seinen Vorstufen -. Geburtshilfe Frauenheilkd 2000. [DOI: 10.1055/s-2000-8019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
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32
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Rompe JD, Zöllner J, Nafe B, Freitag C. [Significance of calcium deposit elimination in tendinosis calcarea of the shoulder]. Z Orthop Ihre Grenzgeb 2000; 138:335-9. [PMID: 11033902 DOI: 10.1055/s-2000-10158] [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] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
AIM To evaluate the effect of complete elimination of the calcific deposit on the clinical outcome in patients with a recalcitrant calcifying tendinitis of the shoulder. PATIENTS AND METHODS 50 patients with a chronic calcifying tendinitis of the shoulder (Type Gärtner I or II) underwent a single application of extracorporeal shock waves (3000 impulses, energy flux density 0.60 mJ/mm2). After one year 45 patients were evaluated radiologically and clinically. RESULTS Radiologically a complete absorption of the calcific deposit was observed in 21 patients (47%). In 9 patients there was no radiological change. The radiological success was closely related to the radiomorphology of the deposit. 18 out of 27 good or excellent results were accompanied by a complete disintegration of the deposit. We calculated a significant dependency between complete disintegration of the deposit and a good/excellent clinical result (p = 0.0002). Patients with a completely disintegrated deposit had significantly better scores than those with a partial disintegration of the calcium (p = 0.02), and than those with no radiomorphological changes (p = 0.0003). Spearman's correlation coefficient was 0.6. CONCLUSION Elimination of the deposit is paramount for a good clinical outcome and should be the main goal for any treatment.
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Affiliation(s)
- J D Rompe
- Orthopädische Klinik, Johannes-Gutenberg-Universität Mainz
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33
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Freitag C, Svendsen AB, Feldthus N, Løssl K, Sheikh SP. Coupling of the human Y2 receptor for neuropeptide Y and peptide YY to guanine nucleotide inhibitory proteins in permeabilized SMS-KAN cells. J Neurochem 1995; 64:643-50. [PMID: 7830057 DOI: 10.1046/j.1471-4159.1995.64020643.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [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: 01/27/2023]
Abstract
Using guanine nucleotides, pertussis toxin, and specific antisera against the COOH-terminals of the alpha-subunits of Gi1/2, Gi3, and G(o), the binding and biological response of the Y2 receptor (Y2R) for peptide YY (PYY) was probed in SMS-KAN neuroblastoma cells. The specific binding of radiolabeled PYY exhibited a single apparent dissociation constant, KD = 76 pM for intact cells and KD = 906 pM for permeabilized cells. However, other data suggested existence of multiple receptor affinity states. A shift in KD and a decrease in apparent number of binding sites (Bmax) was observed in permeabilized cells when incubated with guanine nucleotides. By contrast, in membrane preparations guanine nucleotides induced only a decrease in Bmax. In intact cells, agonist exposure inhibited the intracellular accumulation of forskolin-stimulated cyclic AMP by 80% (IC50 = 420 nM) compared with 94% inhibition (IC50 = 380 nM) in permeabilized cells. In permeabilized cells, preincubation with antisera against alpha i1/2 and alpha i3 blocked the functional response of PYY, with anti-alpha i3 being the most potent; whereas anti-alpha o failed to affect the cyclic AMP levels. These results suggest that permeabilized SMS-KAN cells serve as a good model system for analysis of Y2R binding kinetics and functional response and that the Y2R interacts directly with several different GiS (but not G(o)).
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Affiliation(s)
- C Freitag
- Department of Clinical Biochemistry, National University Hospital Rigshospitalet, Copenhagen, Denmark
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Abstract
Fluorescently labeled vinculin binds to focal contact areas in permeabilized cells independent of actin (Avnur, Z., J. V. Small, and B. Geiger, 1983, J. Cell Biol., 96:1622-1630), but the nature of the binding site is unknown. In this study we have examined the interaction of vinculin with these sites in permeabilized L6 myoblasts to define conditions that perturb the binding and subsequently to reconstitute it. Mild treatment with low concentrations of protease prevents vinculin incorporation without gross changes in the cytoskeleton or extensive protein breakdown. Exposure to buffers of moderate ionic strength also reduces subsequent vinculin binding without large morphological effects. These extraction conditions were used to obtain a fraction from gizzard which was able to restore the vinculin localization. Talin, actin, and vinculin itself were able to alter the binding of labeled vinculin to permeabilized cells and each also interacted with vinculin in gel overlays; however, they were unable to reconstitute the binding site in treated permeabilized cells. The results show a requirement for an as yet unidentified protein to capacitate vinculin binding to focal contact sites and suggest that this protein is peripheral and interacts directly with the binding site.
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35
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Freitag C, Clarke S. Reversible methylation of cytoskeletal and membrane proteins in intact human erythrocytes. J Biol Chem 1981; 256:6102-8. [PMID: 7240192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Membrane protein methylation was studied in intact human erythrocytes. Erythrocytes were incubated with physiological concentrations of L-[methyl]3H]methionine and incorporated 35 pmol of methyl groups into membrane components/mg of membrane protein in a 2.5-hr incubation at 37 degrees C. At least 90% of the total groups (12,500 methyl groups/cell) were incorporated into polypeptides via linkages which were labile to 1 N NaOH. Major methylated membrane polypeptides were identified based on the comigration of radioactivity with Coomassie blue- and periodic acid-Schiff-staining species in pH 2.4 dodecyl sulfate gel electrophoresis, as well as by the distribution of radiolabel and protein following selective proteolysis and membrane extraction procedures. Methylated species identified in this way include the cytoskeletal polypeptides band 2.1 (ankyrin) and band 4.1, as well as the band 3 anion transport protein. Other methylated species include an intrinsic polypeptide comigrating with band 3 but insensitive to external chymotrypsin digestion, a glycoprotein showing variable migration in this gel system (40,000-55,000 daltons), an intrinsic polypeptide at about 30,000 daltons, and an extrinsic species of about 17,000 daltons. A small amount of radioactivity comigrated with the band 4.5 region. Bands 1, 2, 4.2, 5, 6, 7, and the major sialoglycoprotein were not methylated in this system. All of the methylated species exhibited turnover in vivo, and the time taken to reach 50% demethylation for each species ranged from less than 2 to 29 h.
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Jaster D, Freitag C. [Bilateral simultaneous implantation of total endoprosthesis of the hip joint]. Beitr Orthop Traumatol 1981; 28:71-5. [PMID: 7225046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Freitag C. Model calculations on the linearity behavior of combs used for optical attenuation in spectrophotometers. Appl Opt 1971; 10:1899-1903. [PMID: 20111224 DOI: 10.1364/ao.10.001899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Part I: For a multiwedge comb placed in the beam path of the radiation source of a spectrophotometer to achieve optical attenuation, formulas can be derived which express the linearity deviation as a function of comb position, number of wedges, and geometry of the wedges. These formulas are applicable provided the irradiance existing at the comb can be stated in a quadratic form expressing the attenuation of the irradiance toward the upper and lower edges of the aperture. The attenuation in the irradiance also functionally relates the position of the comb to wavelength and temperature. Part II: For a single-wedge comb, formulas for the linearity deviation can be derived provided (1) the radiation directed across the slit width of the monochromator is nonuniform, and (2) the size of the slit width is finite in relation to the length of the comb.
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