1
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Konte B, Walters JT, Giegling I, Legge S, Pardiña AF, Cohen D, Pirmohamed M, Tiihonen J, Hartmann AM, Bogers JP, van der Weide J, van der Weide K, Putkonen A, Repo-Tiihonen E, Hallikainen T, Silva E, Imgimarsson O, Sigurdsson E, Kennedy JL, Breen G, Sullivan PF, Rietschel M, Stefansson H, Collier DA, OʼDonovan MC, Rujescu D. HLA-DQB1 6672 G>C is associated with the risk of clozapine-induced agranulocytosis in individuals of European ancestry. PHARMACOPSYCHIATRY 2020. [DOI: 10.1055/s-0039-3403016] [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] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- B Konte
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - JT Walters
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - I Giegling
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - S Legge
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - AF Pardiña
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - D Cohen
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - M Pirmohamed
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - J Tiihonen
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - AM Hartmann
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - JP Bogers
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | | | | | - A Putkonen
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | | | - T Hallikainen
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - E Silva
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - O Imgimarsson
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - E Sigurdsson
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - JL Kennedy
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - G Breen
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - PF Sullivan
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - M Rietschel
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - H Stefansson
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - DA Collier
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - MC OʼDonovan
- Universität Halle-Wittenberg, Halle (Saale), Germany
| | - D Rujescu
- Universität Halle-Wittenberg, Halle (Saale), Germany
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2
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Jonsson BA, Bjornsdottir G, Thorgeirsson TE, Ellingsen LM, Walters GB, Gudbjartsson DF, Stefansson H, Stefansson K, Ulfarsson MO. Brain age prediction using deep learning uncovers associated sequence variants. Nat Commun 2019; 10:5409. [PMID: 31776335 PMCID: PMC6881321 DOI: 10.1038/s41467-019-13163-9] [Citation(s) in RCA: 157] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 10/21/2019] [Indexed: 02/08/2023] Open
Abstract
Machine learning algorithms can be trained to estimate age from brain structural MRI. The difference between an individual’s predicted and chronological age, predicted age difference (PAD), is a phenotype of relevance to aging and brain disease. Here, we present a new deep learning approach to predict brain age from a T1-weighted MRI. The method was trained on a dataset of healthy Icelanders and tested on two datasets, IXI and UK Biobank, utilizing transfer learning to improve accuracy on new sites. A genome-wide association study (GWAS) of PAD in the UK Biobank data (discovery set: \documentclass[12pt]{minimal}
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\begin{document}$$N=4456$$\end{document}N=4456) yielded two sequence variants, rs1452628-T (\documentclass[12pt]{minimal}
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\begin{document}$$P=1.15\times{10}^{-9}$$\end{document}P=1.15×10−9) and rs2435204-G (\documentclass[12pt]{minimal}
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\begin{document}$$\beta =0.102$$\end{document}β=0.102, \documentclass[12pt]{minimal}
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\begin{document}$$P=9.73\times 1{0}^{-12}$$\end{document}P=9.73×10−12). The former is near KCNK2 and correlates with reduced sulcal width, whereas the latter correlates with reduced white matter surface area and tags a well-known inversion at 17q21.31 (H2). Machine learning algorithms can be trained to estimate age from brain structural MRI. Here, the authors introduce a new deep-learning-based age prediction approach, and then carry out a GWAS of the difference between predicted and chronological age, revealing two associated variants.
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Affiliation(s)
- B A Jonsson
- deCODE Genetics/Amgen, Inc., 101, Reykjavik, Iceland.,University of Iceland, 101, Reykjavik, Iceland
| | | | | | | | - G Bragi Walters
- deCODE Genetics/Amgen, Inc., 101, Reykjavik, Iceland.,University of Iceland, 101, Reykjavik, Iceland
| | - D F Gudbjartsson
- deCODE Genetics/Amgen, Inc., 101, Reykjavik, Iceland.,University of Iceland, 101, Reykjavik, Iceland
| | - H Stefansson
- deCODE Genetics/Amgen, Inc., 101, Reykjavik, Iceland
| | - K Stefansson
- deCODE Genetics/Amgen, Inc., 101, Reykjavik, Iceland. .,University of Iceland, 101, Reykjavik, Iceland.
| | - M O Ulfarsson
- deCODE Genetics/Amgen, Inc., 101, Reykjavik, Iceland. .,University of Iceland, 101, Reykjavik, Iceland.
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3
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Jonsson L, Magnusson TE, Thordarson A, Jonsson T, Geller F, Feenstra B, Melbye M, Nohr EA, Vucic S, Dhamo B, Rivadeneira F, Ongkosuwito EM, Wolvius EB, Leslie EJ, Marazita ML, Howe BJ, Moreno Uribe LM, Alonso I, Santos M, Pinho T, Jonsson R, Audolfsson G, Gudmundsson L, Nawaz MS, Olafsson S, Gustafsson O, Ingason A, Unnsteinsdottir U, Bjornsdottir G, Walters GB, Zervas M, Oddsson A, Gudbjartsson DF, Steinberg S, Stefansson H, Stefansson K. Rare and Common Variants Conferring Risk of Tooth Agenesis. J Dent Res 2018; 97:515-522. [PMID: 29364747 DOI: 10.1177/0022034517750109] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We present association results from a large genome-wide association study of tooth agenesis (TA) as well as selective TA, including 1,944 subjects with congenitally missing teeth, excluding third molars, and 338,554 controls, all of European ancestry. We also tested the association of previously identified risk variants, for timing of tooth eruption and orofacial clefts, with TA. We report associations between TA and 9 novel risk variants. Five of these variants associate with selective TA, including a variant conferring risk of orofacial clefts. These results contribute to a deeper understanding of the genetic architecture of tooth development and disease. The few variants previously associated with TA were uncovered through candidate gene studies guided by mouse knockouts. Knowing the etiology and clinical features of TA is important for planning oral rehabilitation that often involves an interdisciplinary approach.
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Affiliation(s)
- L Jonsson
- 1 deCODE genetics/Amgen, Reykjavik, Iceland.,2 Department of Pharmacology, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - T E Magnusson
- 3 Faculty of Odontology, University of Iceland, Reykjavík, Iceland
| | - A Thordarson
- 3 Faculty of Odontology, University of Iceland, Reykjavík, Iceland
| | - T Jonsson
- 3 Faculty of Odontology, University of Iceland, Reykjavík, Iceland
| | - F Geller
- 4 Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
| | - B Feenstra
- 4 Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
| | - M Melbye
- 4 Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark.,5 Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark.,6 Department of Medicine, School of Medicine, Stanford University, Stanford, California, USA
| | - E A Nohr
- 7 Research Unit for Gynaecology and Obstetrics, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - S Vucic
- 8 Department of Oral and Maxillofacial Surgery, Special Dental Care and Orthodontics, Erasmus University Medical Centre, Rotterdam, The Netherlands.,9 Generation R Study Group, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - B Dhamo
- 8 Department of Oral and Maxillofacial Surgery, Special Dental Care and Orthodontics, Erasmus University Medical Centre, Rotterdam, The Netherlands.,9 Generation R Study Group, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - F Rivadeneira
- 9 Generation R Study Group, Erasmus University Medical Centre, Rotterdam, The Netherlands.,10 Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands.,11 Department of Internal Medicine, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - E M Ongkosuwito
- 8 Department of Oral and Maxillofacial Surgery, Special Dental Care and Orthodontics, Erasmus University Medical Centre, Rotterdam, The Netherlands.,9 Generation R Study Group, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - E B Wolvius
- 8 Department of Oral and Maxillofacial Surgery, Special Dental Care and Orthodontics, Erasmus University Medical Centre, Rotterdam, The Netherlands.,9 Generation R Study Group, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - E J Leslie
- 12 Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA, USA.,13 Department of Human Genetics, Emory University School of Medicine, Atlanta, GA, USA
| | - M L Marazita
- 12 Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA, USA.,14 Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA.,15 Clinical and Translational Science, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - B J Howe
- 16 Department of Family Dentistry, College of Dentistry, University of Iowa, Iowa City, IA, USA
| | - L M Moreno Uribe
- 16 Department of Family Dentistry, College of Dentistry, University of Iowa, Iowa City, IA, USA
| | - I Alonso
- 17 i3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,18 UnIGENe, Instituto Biologia Molecular Celular, Universidade do Porto, Porto, Portugal
| | - M Santos
- 17 i3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,18 UnIGENe, Instituto Biologia Molecular Celular, Universidade do Porto, Porto, Portugal
| | - T Pinho
- 17 i3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,18 UnIGENe, Instituto Biologia Molecular Celular, Universidade do Porto, Porto, Portugal.,19 CESPU, Instituto de Investigacão e Formação Avançada em Ciências e Tecnologias da Saúde, Rua Central de Gandra, Gandra-PRD, Portugal
| | - R Jonsson
- 20 Icelandic Health Insurance, Reykjavík, Iceland
| | - G Audolfsson
- 21 Department of Plastic Surgery, Landspitali-University Hospital, Reykjavik, Iceland
| | | | - M S Nawaz
- 1 deCODE genetics/Amgen, Reykjavik, Iceland.,22 Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - S Olafsson
- 1 deCODE genetics/Amgen, Reykjavik, Iceland
| | | | - A Ingason
- 1 deCODE genetics/Amgen, Reykjavik, Iceland
| | | | | | - G B Walters
- 1 deCODE genetics/Amgen, Reykjavik, Iceland.,22 Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - M Zervas
- 1 deCODE genetics/Amgen, Reykjavik, Iceland
| | - A Oddsson
- 1 deCODE genetics/Amgen, Reykjavik, Iceland
| | | | | | | | - K Stefansson
- 1 deCODE genetics/Amgen, Reykjavik, Iceland.,22 Faculty of Medicine, University of Iceland, Reykjavik, Iceland
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4
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Legge SE, Hamshere ML, Ripke S, Pardinas AF, Goldstein JI, Rees E, Richards AL, Leonenko G, Jorskog LF, Chambert KD, Collier DA, Genovese G, Giegling I, Holmans P, Jonasdottir A, Kirov G, McCarroll SA, MacCabe JH, Mantripragada K, Moran JL, Neale BM, Stefansson H, Rujescu D, Daly MJ, Sullivan PF, Owen MJ, O'Donovan MC, Walters JTR. Genome-wide common and rare variant analysis provides novel insights into clozapine-associated neutropenia. Mol Psychiatry 2018; 23:162-163. [PMID: 29296025 PMCID: PMC5754465 DOI: 10.1038/mp.2017.214] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This corrects the article DOI: 10.1038/mp.2016.97.
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5
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Ulfarsson MO, Walters GB, Gustafsson O, Steinberg S, Silva A, Doyle OM, Brammer M, Gudbjartsson DF, Arnarsdottir S, Jonsdottir GA, Gisladottir RS, Bjornsdottir G, Helgason H, Ellingsen LM, Halldorsson JG, Saemundsen E, Stefansdottir B, Jonsson L, Eiriksdottir VK, Eiriksdottir GR, Johannesdottir GH, Unnsteinsdottir U, Jonsdottir B, Magnusdottir BB, Sulem P, Thorsteinsdottir U, Sigurdsson E, Brandeis D, Meyer-Lindenberg A, Stefansson H, Stefansson K. 15q11.2 CNV affects cognitive, structural and functional correlates of dyslexia and dyscalculia. Transl Psychiatry 2017; 7:e1109. [PMID: 28440815 PMCID: PMC5416713 DOI: 10.1038/tp.2017.77] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 02/22/2017] [Accepted: 02/23/2017] [Indexed: 02/07/2023] Open
Abstract
Several copy number variants have been associated with neuropsychiatric disorders and these variants have been shown to also influence cognitive abilities in carriers unaffected by psychiatric disorders. Previously, we associated the 15q11.2(BP1-BP2) deletion with specific learning disabilities and a larger corpus callosum. Here we investigate, in a much larger sample, the effect of the 15q11.2(BP1-BP2) deletion on cognitive, structural and functional correlates of dyslexia and dyscalculia. We report that the deletion confers greatest risk of the combined phenotype of dyslexia and dyscalculia. We also show that the deletion associates with a smaller left fusiform gyrus. Moreover, tailored functional magnetic resonance imaging experiments using phonological lexical decision and multiplication verification tasks demonstrate altered activation in the left fusiform and the left angular gyri in carriers. Thus, by using convergent evidence from neuropsychological testing, and structural and functional neuroimaging, we show that the 15q11.2(BP1-BP2) deletion affects cognitive, structural and functional correlates of both dyslexia and dyscalculia.
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Affiliation(s)
- M O Ulfarsson
- deCODE Genetics/Amgen, Reykjavik, Iceland,Faculty of Electrical and Computer Engineering, University of Iceland, Reykjavik, Iceland,deCODE Genetics/Amgen, Sturlugata 8, 101 Reykjavik, Iceland. E-mail: or
| | | | | | | | - A Silva
- Cardiff University Brain Imaging Research Center, Cardiff University, Cardiff, UK
| | - O M Doyle
- Institute of Psychiatry, King's College, London, UK
| | - M Brammer
- Institute of Psychiatry, King's College, London, UK
| | - D F Gudbjartsson
- deCODE Genetics/Amgen, Reykjavik, Iceland,Faculty of Physical Sciences, University of Iceland, Reykjavik, Iceland
| | - S Arnarsdottir
- deCODE Genetics/Amgen, Reykjavik, Iceland,Department of Psychiatry, Landspitali National University Hospital, Reykjavik, Iceland
| | | | | | | | - H Helgason
- deCODE Genetics/Amgen, Reykjavik, Iceland,Faculty of Electrical and Computer Engineering, University of Iceland, Reykjavik, Iceland
| | - L M Ellingsen
- Faculty of Electrical and Computer Engineering, University of Iceland, Reykjavik, Iceland
| | - J G Halldorsson
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - E Saemundsen
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland,The State Diagnosis and Counselling Center, Kopavogur, Iceland
| | | | - L Jonsson
- deCODE Genetics/Amgen, Reykjavik, Iceland
| | | | | | | | | | | | - B B Magnusdottir
- Department of Psychiatry, Landspitali National University Hospital, Reykjavik, Iceland,School of Business, University of Reykjavik, Reykavik, Iceland
| | - P Sulem
- deCODE Genetics/Amgen, Reykjavik, Iceland
| | - U Thorsteinsdottir
- deCODE Genetics/Amgen, Reykjavik, Iceland,Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - E Sigurdsson
- Department of Psychiatry, Landspitali National University Hospital, Reykjavik, Iceland,Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - D Brandeis
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric Hospital, University of Zurich, Zurich, Switzerland,Central Institute of Mental Health, University of Heidelberg Medical Faculty Mannheim, Mannheim, Germany
| | - A Meyer-Lindenberg
- Central Institute of Mental Health, University of Heidelberg Medical Faculty Mannheim, Mannheim, Germany
| | | | - K Stefansson
- deCODE Genetics/Amgen, Reykjavik, Iceland,Faculty of Medicine, University of Iceland, Reykjavik, Iceland,deCODE Genetics/Amgen, Sturlugata 8, 101 Reykjavik, Iceland. E-mail: or
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6
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Legge SE, Hamshere ML, Ripke S, Pardinas AF, Goldstein JI, Rees E, Richards AL, Leonenko G, Jorskog LF, Chambert KD, Collier DA, Genovese G, Giegling I, Holmans P, Jonasdottir A, Kirov G, McCarroll SA, MacCabe JH, Mantripragada K, Moran JL, Neale BM, Stefansson H, Rujescu D, Daly MJ, Sullivan PF, Owen MJ, O'Donovan MC, Walters JTR. Genome-wide common and rare variant analysis provides novel insights into clozapine-associated neutropenia. Mol Psychiatry 2017; 22:1509. [PMID: 27502474 PMCID: PMC5622123 DOI: 10.1038/mp.2016.137] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This corrects the article DOI: 10.1038/mp.2016.97.
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7
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Collier D, Achilla E, Breen G, Curran S, Dima D, Flanagan R, Frank J, Frangou S, Gasse C, Giegling I, Rietschel M, Rujescu D, Maccabe J, McCrone P, Mill J, Sigurdsson E, Stefansson H, Walters J, Verbelen M, Helthuis M. How Can Pharmacogenomics Biomarkers Be Translated into Patient Benefit. Eur Psychiatry 2015. [DOI: 10.1016/s0924-9338(15)30078-x] [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: 10/23/2022] Open
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8
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Christensen AF, Esserlind AL, Werge T, Stefansson H, Olesen J. EHMTI-0377. The influence of genetic constitution on migraine drug responses. J Headache Pain 2014. [PMCID: PMC4182275 DOI: 10.1186/1129-2377-15-s1-m3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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9
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Esserlind A, Christensen AF, Steinberg S, Grarup N, Pedersen O, Hansen T, Werge T, Folkmann-Hansen T, Husemoen LL, Linneberg A, Budtz-Jorgensen E, Westergaard ML, Stefansson H, Olesen J. EHMTI-0380. The association of migraine susceptibility loci with severe migraine characteristics in a clinic-based migraine sample. J Headache Pain 2014. [PMCID: PMC4182050 DOI: 10.1186/1129-2377-15-s1-h1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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10
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Stefansson H, Tryggvadottir L, Olafsdottir E, Mooney E, Olafsson J, Sigurgeirsson B, Jonasson J. Cutaneous melanoma in
I
celand: changing
B
reslow's tumour thickness. J Eur Acad Dermatol Venereol 2014; 29:346-352. [DOI: 10.1111/jdv.12552] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 04/14/2014] [Indexed: 11/29/2022]
Affiliation(s)
- H. Stefansson
- Faculty of Medicine University of Iceland Reykjavik Iceland
- Department of Medicine Landspitali – The National University Hospital of Iceland Reykjavik Iceland
- The Icelandic Cancer Registry Reykjavik Iceland
| | - L. Tryggvadottir
- Faculty of Medicine University of Iceland Reykjavik Iceland
- The Icelandic Cancer Registry Reykjavik Iceland
| | | | - E. Mooney
- Dermatology Laekning Reykjavik Iceland
| | - J.H. Olafsson
- Dermatology Hudlaeknastodin Reykjavik Iceland
- Faculty of Medicine Section of Dermatology University of Iceland Reykjavik Iceland
| | - B. Sigurgeirsson
- Dermatology Hudlaeknastodin Reykjavik Iceland
- Faculty of Medicine Section of Dermatology University of Iceland Reykjavik Iceland
| | - J.G. Jonasson
- Faculty of Medicine University of Iceland Reykjavik Iceland
- The Icelandic Cancer Registry Reykjavik Iceland
- Department of Pathology Landspitali – The National University Hospital of Iceland Reykjavik Iceland
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11
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Keller MF, Saad M, Bras J, Bettella F, Nicolaou N, Simon-Sanchez J, Mittag F, chel FB, Sharma M, Gibbs JR, Schulte C, Moskvina V, Durr A, Holmans P, Kilarski LL, Guerreiro R, Hernandez DG, Brice A, Ylikotila P, Stefansson H, Majamaa K, Morris HR, Williams N, Gasser T, Heutink P, Wood NW, Hardy J, Martinez M, Singleton AB, Nalls MA. Using genome-wide complex trait analysis to quantify 'missing heritability' in Parkinson's disease. Hum Mol Genet 2013. [DOI: 10.1093/hmg/ddt199] [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: 11/13/2022] Open
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12
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Keller MF, Saad M, Bras J, Bettella F, Nicolaou N, Simon-Sanchez J, Mittag F, Buchel F, Sharma M, Gibbs JR, Schulte C, Moskvina V, Durr A, Holmans P, Kilarski LL, Guerreiro R, Hernandez DG, Brice A, Ylikotila P, Stefansson H, Majamaa K, Morris HR, Williams N, Gasser T, Heutink P, Wood NW, Hardy J, Martinez M, Singleton AB, Nalls MA. Using genome-wide complex trait analysis to quantify 'missing heritability' in Parkinson's disease. Hum Mol Genet 2013. [DOI: 10.1093/hmg/ddt030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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13
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Esserlind AL, Christensen AF, Le H, Kirchmann M, Hauge AW, Toyserkani NM, Hansen T, Grarup N, Werge T, Steinberg S, Bettella F, Stefansson H, Olesen J. Replication and meta-analysis of common variants identifies a genome-wide significant locus in migraine. Eur J Neurol 2013; 20:765-72. [DOI: 10.1111/ene.12055] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2012] [Accepted: 11/01/2012] [Indexed: 01/31/2023]
Affiliation(s)
- A.-L. Esserlind
- Department of Neurology; The Danish Headache Center; Glostrup Hospital; University of Copenhagen; Glostrup; Denmark
| | - A. F. Christensen
- Department of Neurology; The Danish Headache Center; Glostrup Hospital; University of Copenhagen; Glostrup; Denmark
| | - H. Le
- Department of Neurology; The Danish Headache Center; Glostrup Hospital; University of Copenhagen; Glostrup; Denmark
| | - M. Kirchmann
- Department of Neurology; The Danish Headache Center; Glostrup Hospital; University of Copenhagen; Glostrup; Denmark
| | - A. W. Hauge
- Department of Neurology; The Danish Headache Center; Glostrup Hospital; University of Copenhagen; Glostrup; Denmark
| | - N. M. Toyserkani
- Department of Neurology; The Danish Headache Center; Glostrup Hospital; University of Copenhagen; Glostrup; Denmark
| | | | - N. Grarup
- The Novo Nordisk Foundation Center for Basic Metabolic Research; Faculty of Health and Medical Sciences; University of Copenhagen; Denmark
| | - T. Werge
- Institute of Biological Psychiatry; Mental Health Center Sct. Hans; University of Copenhagen; Roskilde; Denmark
| | - S. Steinberg
- deCODE Genetics; Sturlugata 8 IS-101; Reykjavik; Iceland
| | - F. Bettella
- deCODE Genetics; Sturlugata 8 IS-101; Reykjavik; Iceland
| | - H. Stefansson
- deCODE Genetics; Sturlugata 8 IS-101; Reykjavik; Iceland
| | - J. Olesen
- Department of Neurology; The Danish Headache Center; Glostrup Hospital; University of Copenhagen; Glostrup; Denmark
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14
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Kirov G, Pocklington AJ, Holmans P, Ivanov D, Ikeda M, Ruderfer D, Moran J, Chambert K, Toncheva D, Georgieva L, Grozeva D, Fjodorova M, Wollerton R, Rees E, Nikolov I, van de Lagemaat LN, Bayés À, Fernandez E, Olason PI, Böttcher Y, Komiyama NH, Collins MO, Choudhary J, Stefansson K, Stefansson H, Grant SGN, Purcell S, Sklar P, O'Donovan MC, Owen MJ. De novo CNV analysis implicates specific abnormalities of postsynaptic signalling complexes in the pathogenesis of schizophrenia. Mol Psychiatry 2012; 17:142-53. [PMID: 22083728 PMCID: PMC3603134 DOI: 10.1038/mp.2011.154] [Citation(s) in RCA: 612] [Impact Index Per Article: 51.0] [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] [Indexed: 02/03/2023]
Abstract
A small number of rare, recurrent genomic copy number variants (CNVs) are known to substantially increase susceptibility to schizophrenia. As a consequence of the low fecundity in people with schizophrenia and other neurodevelopmental phenotypes to which these CNVs contribute, CNVs with large effects on risk are likely to be rapidly removed from the population by natural selection. Accordingly, such CNVs must frequently occur as recurrent de novo mutations. In a sample of 662 schizophrenia proband-parent trios, we found that rare de novo CNV mutations were significantly more frequent in cases (5.1% all cases, 5.5% family history negative) compared with 2.2% among 2623 controls, confirming the involvement of de novo CNVs in the pathogenesis of schizophrenia. Eight de novo CNVs occurred at four known schizophrenia loci (3q29, 15q11.2, 15q13.3 and 16p11.2). De novo CNVs of known pathogenic significance in other genomic disorders were also observed, including deletion at the TAR (thrombocytopenia absent radius) region on 1q21.1 and duplication at the WBS (Williams-Beuren syndrome) region at 7q11.23. Multiple de novos spanned genes encoding members of the DLG (discs large) family of membrane-associated guanylate kinases (MAGUKs) that are components of the postsynaptic density (PSD). Two de novos also affected EHMT1, a histone methyl transferase known to directly regulate DLG family members. Using a systems biology approach and merging novel CNV and proteomics data sets, systematic analysis of synaptic protein complexes showed that, compared with control CNVs, case de novos were significantly enriched for the PSD proteome (P=1.72 × 10⁻⁶. This was largely explained by enrichment for members of the N-methyl-D-aspartate receptor (NMDAR) (P=4.24 × 10⁻⁶) and neuronal activity-regulated cytoskeleton-associated protein (ARC) (P=3.78 × 10⁻⁸) postsynaptic signalling complexes. In an analysis of 18 492 subjects (7907 cases and 10 585 controls), case CNVs were enriched for members of the NMDAR complex (P=0.0015) but not ARC (P=0.14). Our data indicate that defects in NMDAR postsynaptic signalling and, possibly, ARC complexes, which are known to be important in synaptic plasticity and cognition, play a significant role in the pathogenesis of schizophrenia.
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Affiliation(s)
- G Kirov
- Department of Psychological Medicine and Neurology, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK.
| | - A J Pocklington
- Department of Psychological Medicine and Neurology, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
| | - P Holmans
- Department of Psychological Medicine and Neurology, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
| | - D Ivanov
- Department of Psychological Medicine and Neurology, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
| | - M Ikeda
- Department of Psychiatry, School of Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - D Ruderfer
- Department of Psychiatry, Psychiatric and Neurodevelopmental Genetics Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA,Center for Human Genetics Research, Massachusetts General Hospital, Boston, MA, USA,Stanley Center for Psychiatric Research, Broad Institute, Cambridge, MA, USA
| | - J Moran
- Stanley Center for Psychiatric Research, Broad Institute, Cambridge, MA, USA
| | - K Chambert
- Stanley Center for Psychiatric Research, Broad Institute, Cambridge, MA, USA
| | - D Toncheva
- University Hospital Maichin Dom, Sofia, Bulgaria
| | - L Georgieva
- Department of Psychological Medicine and Neurology, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
| | - D Grozeva
- Department of Psychological Medicine and Neurology, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
| | - M Fjodorova
- Department of Psychological Medicine and Neurology, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
| | - R Wollerton
- Department of Psychological Medicine and Neurology, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
| | - E Rees
- Department of Psychological Medicine and Neurology, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
| | - I Nikolov
- Department of Psychological Medicine and Neurology, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
| | - L N van de Lagemaat
- Genes to Cognition Program, School of Molecular and Clinical Medicine, Edinburgh University, Edinburgh, UK
| | - À Bayés
- Genes to Cognition Program, School of Molecular and Clinical Medicine, Edinburgh University, Edinburgh, UK
| | - E Fernandez
- VIB Department of Molecular and Developmental Genetics, KU Leuven Medical School, Leuven, Belgium
| | | | | | - N H Komiyama
- Genes to Cognition Program, School of Molecular and Clinical Medicine, Edinburgh University, Edinburgh, UK
| | - M O Collins
- The Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, UK
| | - J Choudhary
- The Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, UK
| | | | | | - S G N Grant
- Genes to Cognition Program, School of Molecular and Clinical Medicine, Edinburgh University, Edinburgh, UK
| | - S Purcell
- Department of Psychiatry, Psychiatric and Neurodevelopmental Genetics Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA,Center for Human Genetics Research, Massachusetts General Hospital, Boston, MA, USA,Stanley Center for Psychiatric Research, Broad Institute, Cambridge, MA, USA
| | - P Sklar
- Department of Psychiatry, Psychiatric and Neurodevelopmental Genetics Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA,Center for Human Genetics Research, Massachusetts General Hospital, Boston, MA, USA,Stanley Center for Psychiatric Research, Broad Institute, Cambridge, MA, USA
| | - M C O'Donovan
- Department of Psychological Medicine and Neurology, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK,Department of Psychological Medicine and Neurology, Henry Wellcome Building, School of Medicine, Cardiff University, Heath Park, Cardiff, CF14 4XN, UK. E-mail: or
| | - M J Owen
- Department of Psychological Medicine and Neurology, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
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15
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Ingason A, Rujescu D, Cichon S, Sigurdsson E, Sigmundsson T, Pietiläinen OPH, Buizer-Voskamp JE, Strengman E, Francks C, Muglia P, Gylfason A, Gustafsson O, Olason PI, Steinberg S, Hansen T, Jakobsen KD, Rasmussen HB, Giegling I, Möller HJ, Hartmann A, Crombie C, Fraser G, Walker N, Lonnqvist J, Suvisaari J, Tuulio-Henriksson A, Bramon E, Kiemeney LA, Franke B, Murray R, Vassos E, Toulopoulou T, Mühleisen TW, Tosato S, Ruggeri M, Djurovic S, Andreassen OA, Zhang Z, Werge T, Ophoff RA, Rietschel M, Nöthen MM, Petursson H, Stefansson H, Peltonen L, Collier D, Stefansson K, St Clair DM. Copy number variations of chromosome 16p13.1 region associated with schizophrenia. Mol Psychiatry 2011; 16:17-25. [PMID: 19786961 PMCID: PMC3330746 DOI: 10.1038/mp.2009.101] [Citation(s) in RCA: 204] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Deletions and reciprocal duplications of the chromosome 16p13.1 region have recently been reported in several cases of autism and mental retardation (MR). As genomic copy number variants found in these two disorders may also associate with schizophrenia, we examined 4345 schizophrenia patients and 35,079 controls from 8 European populations for duplications and deletions at the 16p13.1 locus, using microarray data. We found a threefold excess of duplications and deletions in schizophrenia cases compared with controls, with duplications present in 0.30% of cases versus 0.09% of controls (P=0.007) and deletions in 0.12 % of cases and 0.04% of controls (P>0.05). The region can be divided into three intervals defined by flanking low copy repeats. Duplications spanning intervals I and II showed the most significant (P = 0.00010) association with schizophrenia. The age of onset in duplication and deletion carriers among cases ranged from 12 to 35 years, and the majority were males with a family history of psychiatric disorders. In a single Icelandic family, a duplication spanning intervals I and II was present in two cases of schizophrenia, and individual cases of alcoholism, attention deficit hyperactivity disorder and dyslexia. Candidate genes in the region include NTAN1 and NDE1. We conclude that duplications and perhaps also deletions of chromosome 16p13.1, previously reported to be associated with autism and MR, also confer risk of schizophrenia.
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Affiliation(s)
- A Ingason
- deCODE genetics, Reykjavík, Iceland
,Research Institute of Biological Psychiatry, Mental Health Centre Sct. Hans, Copenhagen University Hospital, Roskilde, Denmark
| | - D Rujescu
- Division of Molecular and Clinical Neurobiology, Department of Psychiatry, Ludwig-Maximilians-University and Genetics Research Centre GmbH, Munich, Germany
| | - S Cichon
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
,Institute of Human Genetics, University of Bonn, Bonn, Germany
| | - E Sigurdsson
- Department of Psychiatry, National University Hospital, Reykjavík, Iceland
| | - T Sigmundsson
- Department of Psychiatry, National University Hospital, Reykjavík, Iceland
| | - OPH Pietiläinen
- Department for Molecular Medicine, National Public Health Institute, Helsinki, Finland
| | - JE Buizer-Voskamp
- Department of Psychiatry, Rudolf Magnus Institute of Neuroscience, University Medical Center Utrecht, Utrecht, The Netherlands
,Department of Medical Genetics and Rudolf Magnus Institute of Neuroscience, University Medical Center Utrecht, Utrecht, The Netherlands
| | - E Strengman
- Department of Medical Genetics and Rudolf Magnus Institute of Neuroscience, University Medical Center Utrecht, Utrecht, The Netherlands
| | - C Francks
- Medical Genetics, GlaxoSmithKline R&D, Verona, Italy
| | - P Muglia
- Medical Genetics, GlaxoSmithKline R&D, Verona, Italy
| | | | | | | | | | - T Hansen
- Research Institute of Biological Psychiatry, Mental Health Centre Sct. Hans, Copenhagen University Hospital, Roskilde, Denmark
| | - KD Jakobsen
- Research Institute of Biological Psychiatry, Mental Health Centre Sct. Hans, Copenhagen University Hospital, Roskilde, Denmark
| | - HB Rasmussen
- Research Institute of Biological Psychiatry, Mental Health Centre Sct. Hans, Copenhagen University Hospital, Roskilde, Denmark
| | - I Giegling
- Division of Molecular and Clinical Neurobiology, Department of Psychiatry, Ludwig-Maximilians-University and Genetics Research Centre GmbH, Munich, Germany
| | - H-J Möller
- Division of Molecular and Clinical Neurobiology, Department of Psychiatry, Ludwig-Maximilians-University and Genetics Research Centre GmbH, Munich, Germany
| | - A Hartmann
- Division of Molecular and Clinical Neurobiology, Department of Psychiatry, Ludwig-Maximilians-University and Genetics Research Centre GmbH, Munich, Germany
| | - C Crombie
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, Scotland
| | - G Fraser
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, Scotland
| | - N Walker
- Ravenscraig Hospital, Greenock, Scotland
| | - J Lonnqvist
- Department of Mental Health and Addiction, National Public Health Institute, Helsinki, Finland
| | - J Suvisaari
- Department of Mental Health and Addiction, National Public Health Institute, Helsinki, Finland
| | - A Tuulio-Henriksson
- Department of Mental Health and Addiction, National Public Health Institute, Helsinki, Finland
| | - E Bramon
- Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King’s College, London, UK
| | - LA Kiemeney
- Department of Epidemiology & Biostatistics (133 EPIB)/Department of Urology (659 URO), Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - B Franke
- Department of Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - R Murray
- Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King’s College, London, UK
| | - E Vassos
- Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King’s College, London, UK
| | - T Toulopoulou
- Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King’s College, London, UK
| | - TW Mühleisen
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
| | - S Tosato
- Section of Psychiatry and Clinical Psychology, University of Verona, Verona, Italy
| | - M Ruggeri
- Section of Psychiatry and Clinical Psychology, University of Verona, Verona, Italy
| | - S Djurovic
- Institute of Psychiatry, University of Oslo, Oslo, Norway
,Departments of Medical Genetics and Psychiatry, Ulleval University Hospital, Oslo, Norway
| | - OA Andreassen
- Institute of Psychiatry, University of Oslo, Oslo, Norway
,Departments of Medical Genetics and Psychiatry, Ulleval University Hospital, Oslo, Norway
| | - Z Zhang
- Department of Statistics, UCLA, Los Angeles, CA, USA
| | - T Werge
- Research Institute of Biological Psychiatry, Mental Health Centre Sct. Hans, Copenhagen University Hospital, Roskilde, Denmark
| | - RA Ophoff
- Department of Medical Genetics and Rudolf Magnus Institute of Neuroscience, University Medical Center Utrecht, Utrecht, The Netherlands
,UCLA Center for Neurobehavioral Genetics and Department of Human Genetics, Los Angeles, CA, USA
| | | | - M Rietschel
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health Mannheim, University of Heidelberg, Mannheim, Germany
| | - MM Nöthen
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
,Institute of Human Genetics, University of Bonn, Bonn, Germany
| | - H Petursson
- Department of Psychiatry, National University Hospital, Reykjavík, Iceland
| | | | - L Peltonen
- Department for Molecular Medicine, National Public Health Institute, Helsinki, Finland
,Wellcome Trust Sanger Institute, Hinxton, Cambridge, UK
,The Broad Institute, Cambridge, MA, USA
| | - D Collier
- Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King’s College, London, UK
| | | | - DM St Clair
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, Scotland
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16
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Thomsen LL, Oestergaard E, Bjornsson A, Stefansson H, Fasquel AC, Gulcher J, Stefansson K, Olesen J. Screen for CACNA1A and ATP1A2 mutations in sporadic hemiplegic migraine patients. Cephalalgia 2008; 28:914-21. [PMID: 18513263 DOI: 10.1111/j.1468-2982.2008.01599.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The aim of this study was to investigate the involvement of the CACNA1A and ATP1A2 gene in a population-based sample of sporadic hemiplegic migraine (SHM). Patients with SHM (n = 105) were identified in a nationwide search in the Danish population. We sequenced all exons and promoter regions of the CACNA1A and ATP1A2 genes in 100 patients with SHM to search for possible SHM mutations. Novel DNA variants were discovered in eight SHM patients, four in exons of the CACNA1A gene and four in exons of the ATP1A2 gene. Six of the variants were considered non-pathogenic. The causal role of the two remaining DNA variants is unknown until functional studies have been made or independent genetic evidence is discovered. Only very few DNA variants were identified in 100 SHM patients, and regardless of whether the identified variants are causal the CACNA1A and ATP1A2 genes are not major genes in SHM.
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Affiliation(s)
- L L Thomsen
- Danish Headache Centre, University of Copenhagen, Department of Neurology, Glostrup Hospital, Glostrup, Denmark.
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17
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Thomsen LL, Kirchmann M, Bjornsson A, Stefansson H, Jensen RM, Fasquel AC, Petursson H, Stefansson M, Frigge ML, Kong A, Gulcher J, Stefansson K, Olesen J. The genetic spectrum of a population-based sample of familial hemiplegic migraine. Brain 2006; 130:346-56. [PMID: 17142831 DOI: 10.1093/brain/awl334] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.8] [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: 11/13/2022] Open
Abstract
Familial hemiplegic migraine (FHM) is a rare subtype of migraine with aura and transient hemiplegia. FHM mutations are known in three genes, the CACNA1A (FHM1) gene, the ATP1A2 (FHM2) and the SCN1A (FHM3) gene and seem to have an autosomal-dominant mode of inheritance. The aim of this study was to search for FHM mutations in FHM families identified through a screen of the Danish population of 5.2 million people. FHM patients were diagnosed according to the International Classification of Headache Disorders and all FHM patients had a physical and neurological examination by a physician. A total of 147 FHM patients from 44 different families were identified; 43 FHM families participated in this study. Linkage analysis of these families shows clear linkage to the FHM locus (FHM1) on chromosome 19, supportive linkage to the FHM2 locus whereas no linkage was found to the FHM3 locus. Furthermore, we sequenced all exons and promoter regions of the CACNA1A and ATP1A2 genes and screened for the Q1489K mutation in the SCN1A gene. CACNA1A gene mutations were identified in three of the FHM families, two known FHM mutations, R583Q and T666M and one novel C1369Y mutation. Three FHM families were identified with novel mutations in the ATP1A2 gene; a family with a V138A mutation, a family with a R202Q mutation and a family with a R763C mutation. None of the Danish FHM families have the Q1489K mutation in the SCN1A gene. Our study shows that only 14% (6/42) of FHM families in the general Danish population have exonic FHM mutations in the CACNA1A or ATP1A2 gene. The families we identified with FHM mutations in the CACNA1A and ATP1A2 genes were extended, multiple affected families whereas the remaining FHM families were smaller. The existence of many small families in the Danish FHM cohort may reflect less bias in FHM family ascertainment and/or more locus heterogeneity than described previously.
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Affiliation(s)
- L L Thomsen
- Danish Headache Center, University of Copenhagen, Department of Neurology Glostrup Hospital, Copenhagen, Denmark.
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18
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Li T, Stefansson H, Gudfinnsson E, Cai G, Liu X, Murray RM, Steinthorsdottir V, Januel D, Gudnadottir VG, Petursson H, Ingason A, Gulcher JR, Stefansson K, Collier DA. Identification of a novel neuregulin 1 at-risk haplotype in Han schizophrenia Chinese patients, but no association with the Icelandic/Scottish risk haplotype. Mol Psychiatry 2004; 9:698-704. [PMID: 15007393 DOI: 10.1038/sj.mp.4001485] [Citation(s) in RCA: 127] [Impact Index Per Article: 6.4] [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: 02/04/2023]
Abstract
To determine if neuregulin 1 (NRG1) is associated with schizophrenia in Asian populations, we investigated a Han Chinese population using both a family trio design and a case-control design. A total of 25 microsatellite markers and single nucleotide polymorphisms (SNPs) were genotyped spanning the 1.1 Mb NRG1 gene including markers of a seven-marker haplotype at the 5' end of the gene found to be in excess in Icelandic and Scottish schizophrenia patients. The alleles of the individual markers forming the seven marker at-risk haplotype are not likely to be causative as they are not in excess in patients in the Chinese population studied here. However using unrelated patients, we find a novel haplotype (HAP(China 1)), immediately upstream of the Icelandic haplotype, in excess in patients (11.9% in patients vs 4.2% in controls; P=0.0000065, risk ratio (rr) 3.1), which was not significant when parental controls were used. Another haplotype (HAP(China 2)) overlapping the Icelandic risk haplotype was found in excess in the Chinese (8.5% of patients vs 4.0% of unrelated controls; P=0.003, rr 2.2) and was also significant using parental controls only (P=0.0047, rr 2.1). A four-marker haplotype at the 3' end of the NRG1 gene, HAP(China 3), was found at a frequency of 23.8% in patients and 13.7% in nontransmitted parental haplotypes (P=0.000042, rr=2.0) but was not significant in the case-control comparison. We conclude that different haplotypes within the boundaries of the NRG1 gene may be associated with schizophrenia in the Han Chinese.
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Affiliation(s)
- T Li
- Division of Psychological Medicine, Institute of Psychiatry, De Crespigny Park, Denmark Hill, London SE5 8AF, UK
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19
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Stefansson H, Geirsson RT, Steinthorsdottir V, Jonsson H, Manolescu A, Kong A, Ingadottir G, Gulcher J, Stefansson K. Genetic factors contribute to the risk of developing endometriosis. Hum Reprod 2002; 17:555-9. [PMID: 11870102 DOI: 10.1093/humrep/17.3.555] [Citation(s) in RCA: 140] [Impact Index Per Article: 6.4] [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: 11/14/2022] Open
Abstract
BACKGROUND Endometriosis is known to cluster within nuclear families. The extent of familial clustering can be evaluated in Iceland with its large population-based genealogical database. METHODS AND RESULTS Applying several measures of familiality we demonstrated that 750 women with endometriosis were significantly more interrelated than matched control groups. The risk ratio for sisters was 5.20 (P < 0.001) and for cousins 1.56 (P = 0.003). The average kinship coefficient for the patients was significantly higher than that calculated for 1000 sets of 750 matched controls (P < 0.001) and this remained significant when contribution from first-degree relatives was excluded (P < 0.05). The minimum number of ancestors required to account for the group of patients was compared with the minimum number of ancestors required to account for the control groups at different time points in the past. The minimum number of founders for the group of patients was significantly smaller than for the control groups. Affected cousin pairs were as likely to be paternally connected as maternally connected. CONCLUSIONS This is the first population-based study using an extensive genealogy database to examine the genetic contribution to endometriosis. A genetic factor is present, with a raised risk in close and more distant relatives, and a definite kinship factor with maternal and paternal inheritance contributing.
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Affiliation(s)
- H Stefansson
- DeCode Genetics, Lynghals 1, Reykjavik, IS-110, Iceland.
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20
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Geirsson R, Stefansson H, Kristin J, Einarsdottir A, Frigge M, Gulcher J. Linkage or association to the GALT gene on chromosome 9 is not demonstrable in endometriosis. Fertil Steril 2002. [DOI: 10.1016/s0015-0282(01)03073-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Geirsson R, Stefansson H, Steinthorsdottir V, Manolescu A, Kong A, Gulcher J. Genetic factors contributing to the risk of endometriosis: data from a population-based study. Fertil Steril 2002. [DOI: 10.1016/s0015-0282(01)03074-6] [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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22
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Stefansson H, Einarsdottir A, Geirsson RT, Jonsdottir K, Sverrisdottir G, Gudnadottir VG, Gunnarsdottir S, Manolescu A, Gulcher J, Stefansson K. Endometriosis is not associated with or linked to the GALT gene. Fertil Steril 2001; 76:1019-22. [PMID: 11704127 DOI: 10.1016/s0015-0282(01)02862-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [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: 11/29/2022]
Abstract
OBJECTIVE To investigate a possible association between the carrier frequency of the N314D mutation in the galactose-1-phosphate uridyl transferase (GALT) gene and endometriosis and linkage to the short arm of chromosome 9, where the GALT gene resides. DESIGN Association and linkage study. SETTING Population material collected for case and family studies in endometriosis. PATIENT(S) Women diagnosed with endometriosis by laparotomy or laparoscopy. INTERVENTION(S) Association with the GALT gene investigated by genotyping 85 affected women and 213 unrelated control women and a scan for linkage to chromosome 9 in 205 women from 64 families with endometriosis. MAIN OUTCOME MEASURE(S) Multipoint parametric lod scores and frequency of alleles. RESULT(S) There was no significant difference in allele frequency for the N314D polymorphism in patients compared with control subjects. No evidence for linkage was found to chromosome 9p, where the GALT gene resides. CONCLUSION(S) The experiments reported herein provide no evidence supporting involvement of the GALT locus in the development of endometriosis.
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Affiliation(s)
- H Stefansson
- deCODE Genetics, Lynghals 1, 110 Reykjavik, Iceland.
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23
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Mamedov F, Stefansson H, Albertsson PA, Styring S. Photosystem II in different parts of the thylakoid membrane: a functional comparison between different domains. Biochemistry 2000; 39:10478-86. [PMID: 10956038 DOI: 10.1021/bi992877k] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [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: 11/29/2022]
Abstract
The electron transport properties of photosystem II (PSII) from five different domains of the thylakoid membrane were analyzed by flash-induced fluorescence kinetics. These domains are the entire grana, the grana core, the margins from the grana, the stroma lamellae, and the Y100 fraction (which represent more purified stroma lamellae). The two first fractions originate from appressed grana membranes and have PSII with a high proportion of O(2)-evolving centers (80-90%) and efficient electron transport on the acceptor side. About 30% of the granal PSII centers were found in the margin fraction. Two-thirds of those PSII centers evolve O(2), but the electron transfer on the acceptor side is slowed. PSII from the stroma lamellae was less active. The fraction containing the entire stroma has only 43% O(2)-evolving PSII centers and slow electron transfer on the acceptor side. In contrast, PSII centers of the Y100 fraction show no O(2) evolution and were unable to reduce Q(B). Flash-induced fluorescence decay measurements in the presence of DCMU give information about the integrity of the donor side of PSII. We were able to distinguish between PSII centers with a functional Mn cluster and without any Mn cluster, and PSII centers which undergo photoactivation and have a partially assembled Mn cluster. From this analysis, we propose the existence of a PSII activity gradient in the thylakoid membrane. The gradient is directed from the stroma lamellae, where the Mn cluster is absent or inactive, via the margins where photoactivation accelerates, to the grana core domain where PSII is fully photoactivated. The photoactivation process correlates to the PSII diffusion along the membrane and is initiated in the stroma lamellae while the final steps take place in the appressed regions of the grana core. The margin domain is seemingly very important in this process.
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Affiliation(s)
- F Mamedov
- Department of Biochemistry, Center for Chemistry and Chemical Engineering, P.O. Box 124, Lund University, S-221 00 Lund, Sweden
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Yu SG, Stefansson H, Romanowska E, Albertsson PÅ. Two dimensional electrophoresis of thylakoid membrane proteins and its application to microsequencing. Photosynth Res 1994; 41:475-486. [PMID: 24310161 DOI: 10.1007/bf02183049] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/1993] [Accepted: 07/18/1994] [Indexed: 06/02/2023]
Abstract
A procedure of two-dimensional gel electrophoresis adapted for application on membrane proteins from the thylakoids is described. It involves isoelectric focusing in the first dimension and size dependent electrophoresis in the second dimension. About 100 polypeptides are clearly separated with relatively little streaking. About 20 polypeptides are identified by immunoblotting or location in the gel. They are the polypeptides of the PS I core, the 64 kDa protein, the α and β subunits of CF1 ATPase, cytochrome f, Rieske iron-sulfur protein, the 23 kDa and 33 kDa polypeptides of the oxygen evolving complexes, CP29, CP24, CP27 and CP25 (last two proteins belong to LHCII). Some proteins give rise to two or more separate spots indicating a separation of different isoforms of these proteins. Among them, the LHCII polypeptides (27 kDa and 25 kDa) were each resolved into at least three spots in the pH range 4.75-5.90; the Rieske FeS protein, as published elsewhere (Yu et al. 1994), was separated into two forms having different isoelectric points (pI 5.1 and 5.4), each of them was also microsequenced; the 64 kDa protein claimed to be a LHCII-kinase was found to be multiple forms appearing in at least two isoforms with pI 6.2 (K1) and 6.0 (K2) respectively, furthermore, K1 can be resolved into two subpopulations.The lateral distribution of these proteins in the thylakoid membrane was determined by analysing the vesicles originating from different parts of the thylakoids. The data obtained from this analysis can be partially used as markers for different thylakoid domains.This procedure for sample solubilization and 2-D electrophoresis is useful for the analysis of the polypeptide composition of vesicles originating from the thylakoid membrane and for microsequences of individual polypeptides isolated from the 2-D gel.
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Affiliation(s)
- S G Yu
- Department of Biochemistry, University of Lund, PO. Box 124, S-221 00, Lund, Sweden
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