R
Ragnheidur Fossdal
Researcher at deCODE genetics
Publications - 18
Citations - 8391
Ragnheidur Fossdal is an academic researcher from deCODE genetics. The author has contributed to research in topics: Population & Genome-wide association study. The author has an hindex of 16, co-authored 18 publications receiving 8005 citations.
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Journal ArticleDOI
Large recurrent microdeletions associated with schizophrenia
Hreinn Stefansson,Dan Rujescu,Sven Cichon,Olli Pietiläinen,Andres Ingason,Stacy Steinberg,Ragnheidur Fossdal,Engilbert Sigurdsson,Thordur Sigmundsson,Jacobine E. Buizer-Voskamp,Thomas Hansen,Thomas Hansen,Klaus D. Jakobsen,Klaus D. Jakobsen,Pierandrea Muglia,Clyde Francks,Paul M. Matthews,Arnaldur Gylfason,Bjarni V. Halldorsson,Daniel F. Gudbjartsson,Thorgeir E. Thorgeirsson,Asgeir Sigurdsson,Adalbjorg Jonasdottir,Aslaug Jonasdottir,Asgeir Björnsson,Sigurborg Mattiasdottir,Thorarinn Blondal,Magnús Haraldsson,Brynja B. Magnusdottir,Ina Giegling,Hans-Jürgen Möller,Annette M. Hartmann,Kevin V. Shianna,Dongliang Ge,Anna C. Need,Caroline Crombie,Gillian Fraser,Nicholas Walker,Jouko Lönnqvist,Jaana Suvisaari,Annamarie Tuulio-Henriksson,Tiina Paunio,T. Toulopoulou,Elvira Bramon,Marta Di Forti,Robin M. Murray,Mirella Ruggeri,Evangelos Vassos,Sarah Tosato,Muriel Walshe,Tao Li,Tao Li,Catalina Vasilescu,Thomas W. Mühleisen,August G. Wang,Henrik Ullum,Srdjan Djurovic,Ingrid Melle,Jes Olesen,Lambertus A. Kiemeney,Barbara Franke,Chiara Sabatti,Nelson B. Freimer,Jeffrey R. Gulcher,Unnur Thorsteinsdottir,Augustine Kong,Ole A. Andreassen,Roel A. Ophoff,Roel A. Ophoff,Alexander Georgi,Marcella Rietschel,Thomas Werge,Hannes Petursson,David Goldstein,Markus M. Nöthen,Leena Peltonen,Leena Peltonen,David A. Collier,David A. Collier,David St Clair,Kari Stefansson,Kari Stefansson +81 more
TL;DR: In a genome-wide search for CNVs associating with schizophrenia, a population-based sample was used to identify de novo CNVs by analysing 9,878 transmissions from parents to offspring and three deletions significantly associate with schizophrenia and related psychoses in the combined sample.
Journal ArticleDOI
Common variants conferring risk of schizophrenia
Hreinn Stefansson,Hreinn Stefansson,Roel A. Ophoff,Roel A. Ophoff,Roel A. Ophoff,Stacy Steinberg,Stacy Steinberg,Ole A. Andreassen,Sven Cichon,Dan Rujescu,Thomas Werge,Olli Pietilainen,Ole Mors,Preben Bo Mortensen,Engilbert Sigurdsson,Omar Gustafsson,Mette Nyegaard,Annamari Tuulio-Henriksson,Andres Ingason,Thomas Hansen,Jaana Suvisaari,Jouko Lönnqvist,Tiina Paunio,Anders D. Børglum,Anders D. Børglum,Annette M. Hartmann,Anders Fink-Jensen,Merete Nordentoft,David M. Hougaard,Bent Nørgaard-Pedersen,Yvonne Böttcher,Jes Olesen,René Breuer,Hans-Jürgen Möller,Ina Giegling,Henrik B. Rasmussen,Sally Timm,Manuel Mattheisen,István Bitter,János Réthelyi,Brynja B. Magnusdottir,Thordur Sigmundsson,Pall I. Olason,Gisli Masson,Jeffrey R. Gulcher,Magnús Haraldsson,Ragnheidur Fossdal,Thorgeir E. Thorgeirsson,Unnur Thorsteinsdottir,Unnur Thorsteinsdottir,Mirella Ruggeri,Sarah Tosato,Barbara Franke,Eric Strengman,Lambertus A. Kiemeney,Ingrid Melle,Srdjan Djurovic,Lilia I. Abramova,Kaleda Vg,Julio Sanjuán,Rosa de Frutos,Elvira Bramon,Evangelos Vassos,Gillian Fraser,Ulrich Ettinger,Marco Picchioni,Nicholas Walker,T. Toulopoulou,Anna C. Need,Dongliang Ge,Joeng Lim Yoon,Kevin V. Shianna,Nelson B. Freimer,Rita M. Cantor,Robin M. Murray,Augustine Kong,Vera Golimbet,Angel Carracedo,Celso Arango,Javier Costas,Erik G. Jönsson,Lars Terenius,Ingrid Agartz,Hannes Petursson,Markus M. Nöthen,Marcella Rietschel,Paul M. Matthews,Pierandrea Muglia,Leena Peltonen,David St Clair,David Goldstein,Kari Stefansson,Kari Stefansson,David A. Collier,David A. Collier +94 more
TL;DR: Findings implicating the MHC region are consistent with an immune component to schizophrenia risk, whereas the association with NRGN and TCF4 points to perturbation of pathways involved in brain development, memory and cognition.
Journal ArticleDOI
Association between Microdeletion and Microduplication at 16p11.2 and Autism
Lauren A. Weiss,Yiping Shen,Joshua M. Korn,Joshua M. Korn,Dan E. Arking,David T. Miller,Ragnheidur Fossdal,Evald Saemundsen,Hreinn Stefansson,Todd Green,Todd Green,Orah S. Platt,Douglas M. Ruderfer,Douglas M. Ruderfer,Christopher A. Walsh,David Altshuler,David Altshuler,Aravinda Chakravarti,Aravinda Chakravarti,Rudolph E. Tanzi,Kari Stefansson,Susan L. Santangelo,James F. Gusella,James F. Gusella,Pamela Sklar,Pamela Sklar,Bai-Lin Wu,Mark J. Daly,Mark J. Daly +28 more
TL;DR: A novel, recurrent microdeletion and a reciprocal microduplication that carry substantial susceptibility to autism and appear to account for approximately 1% of cases are identified.
Journal ArticleDOI
Genetics of gene expression and its effect on disease
Valur Emilsson,Gudmar Thorleifsson,Bin Zhang,Amy Leonardson,Florian Zink,Jun Zhu,Sonia Carlson,Agnar Helgason,G. Bragi Walters,Steinunn Gunnarsdottir,Magali Mouy,Valgerdur Steinthorsdottir,Gudrun H. Eiriksdottir,Gyda Bjornsdottir,Inga Reynisdottir,Daniel F. Gudbjartsson,Anna Helgadottir,Aslaug Jonasdottir,Adalbjorg Jonasdottir,Unnur Styrkarsdottir,Solveig Gretarsdottir,Kristinn P. Magnusson,Hreinn Stefansson,Ragnheidur Fossdal,Kristleifur Kristjansson,Hjörtur Gislason,Tryggvi Stefansson,Björn Geir Leifsson,Unnur Thorsteinsdottir,John Lamb,Jeffrey R. Gulcher,Marc L. Reitman,Augustine Kong,Eric E. Schadt,Kari Stefansson +34 more
TL;DR: An extensive transcriptional network constructed from the human adipose data that exhibits significant overlap with similar network modules constructed from mouse adiposeData was identified that is enriched for genes involved in the inflammatory and immune response and has been found to be causally associated to obesity-related traits.
Journal ArticleDOI
Association between microdeletion and microduplication at 16p11.2 and autism
Lauren A. Weiss,Yiping Shen,Joshua M. Korn,Dan E. Arking,David T. Miller,Ragnheidur Fossdal,Evald Saemundsen,Hreinn Stefansson,Manuel A. R. Ferreira,Todd Green,Orah S. Piatt,Douglas M. Ruderfer,Christopher A. Walsh,David Altshuler,Aravinda Chakravarti,Rudolph E. Tanzi,Kari Stefansson,Susan L. Santangelo,James F. Gusella,Pamela Sklar,Bai-Lin Wu,Mark J. Daly +21 more