@article{PostemaHoogmanAmbrosinoetal.2021, author = {Postema, Merel C. and Hoogman, Martine and Ambrosino, Sara and Asherson, Philip and Banaschewski, Tobias and Bandeira, Cibele E. and Baranov, Alexandr and Bau, Claiton H.D. and Baumeister, Sarah and Baur-Streubel, Ramona and Bellgrove, Mark A. and Biederman, Joseph and Bralten, Janita and Brandeis, Daniel and Brem, Silvia and Buitelaar, Jan K. and Busatto, Geraldo F. and Castellanos, Francisco X. and Cercignani, Mara and Chaim-Avancini, Tiffany M. and Chantiluke, Kaylita C. and Christakou, Anastasia and Coghill, David and Conzelmann, Annette and Cubillo, Ana I. and Cupertino, Renata B. and de Zeeuw, Patrick and Doyle, Alysa E. and Durston, Sarah and Earl, Eric A. and Epstein, Jeffery N. and Ethofer, Thomas and Fair, Damien A. and Fallgatter, Andreas J. and Faraone, Stephen V. and Frodl, Thomas and Gabel, Matt C. and Gogberashvili, Tinatin and Grevet, Eugenio H. and Haavik, Jan and Harrison, Neil A. and Hartman, Catharina A. and Heslenfeld, Dirk J. and Hoekstra, Pieter J. and Hohmann, Sarah and H{\o}vik, Marie F. and Jernigan, Terry L. and Kardatzki, Bernd and Karkashadze, Georgii and Kelly, Clare and Kohls, Gregor and Konrad, Kerstin and Kuntsi, Jonna and Lazaro, Luisa and Lera-Miguel, Sara and Lesch, Klaus-Peter and Louza, Mario R. and Lundervold, Astri J. and Malpas, Charles B and Mattos, Paulo and McCarthy, Hazel and Namazova-Baranova, Leyla and Nicolau, Rosa and Nigg, Joel T. and Novotny, Stephanie E. and Oberwelland Weiss, Eileen and O'Gorman Tuura, Ruth L. and Oosterlaan, Jaap and Oranje, Bob and Paloyelis, Yannis and Pauli, Paul and Picon, Felipe A. and Plessen, Kerstin J. and Ramos-Quiroga, J. Antoni and Reif, Andreas and Reneman, Liesbeth and Rosa, Pedro G.P. and Rubia, Katya and Schrantee, Anouk and Schweren, Lizanne J.S. and Seitz, Jochen and Shaw, Philip and Silk, Tim J. and Skokauskas, Norbert and Soliva Vila, Juan C. and Stevens, Michael C. and Sudre, Gustavo and Tamm, Leanne and Tovar-Moll, Fernanda and van Erp, Theo G.M. and Vance, Alasdair and Vilarroya, Oscar and Vives-Gilabert, Yolanda and von Polier, Georg G. and Walitza, Susanne and Yoncheva, Yuliya N. and Zanetti, Marcus V. and Ziegler, Georg C. and Glahn, David C. and Jahanshad, Neda and Medland, Sarah E. and Thompson, Paul M. and Fisher, Simon E. and Franke, Barbara and Francks, Clyde}, title = {Analysis of structural brain asymmetries in attention-deficit/hyperactivity disorder in 39 datasets}, series = {Journal of Child Psychology and Psychiatry}, volume = {62}, journal = {Journal of Child Psychology and Psychiatry}, number = {10}, doi = {10.1111/jcpp.13396}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-239968}, pages = {1202 -- 1219}, year = {2021}, abstract = {Objective Some studies have suggested alterations of structural brain asymmetry in attention-deficit/hyperactivity disorder (ADHD), but findings have been contradictory and based on small samples. Here, we performed the largest ever analysis of brain left-right asymmetry in ADHD, using 39 datasets of the ENIGMA consortium. Methods We analyzed asymmetry of subcortical and cerebral cortical structures in up to 1,933 people with ADHD and 1,829 unaffected controls. Asymmetry Indexes (AIs) were calculated per participant for each bilaterally paired measure, and linear mixed effects modeling was applied separately in children, adolescents, adults, and the total sample, to test exhaustively for potential associations of ADHD with structural brain asymmetries. Results There was no evidence for altered caudate nucleus asymmetry in ADHD, in contrast to prior literature. In children, there was less rightward asymmetry of the total hemispheric surface area compared to controls (t = 2.1, p = .04). Lower rightward asymmetry of medial orbitofrontal cortex surface area in ADHD (t = 2.7, p = .01) was similar to a recent finding for autism spectrum disorder. There were also some differences in cortical thickness asymmetry across age groups. In adults with ADHD, globus pallidus asymmetry was altered compared to those without ADHD. However, all effects were small (Cohen's d from -0.18 to 0.18) and would not survive study-wide correction for multiple testing. Conclusion Prior studies of altered structural brain asymmetry in ADHD were likely underpowered to detect the small effects reported here. Altered structural asymmetry is unlikely to provide a useful biomarker for ADHD, but may provide neurobiological insights into the trait.}, language = {en} } @article{FrankeFaraoneAshersonetal.2012, author = {Franke, B. and Faraone, S. V. and Asherson, P. and Buitelaar, J. and Bau, C. H. D. and Ramos-Quiroga, J. A. and Mick, E. and Grevet, E. H. and Johansson, S. and Haavik, J. and Lesch, K.-P. and Cormand, B. and Reif, A.}, title = {The genetics of attention deficit/hyperactivity disorder in adults, a review}, series = {Molecular Psychiatry}, volume = {17}, journal = {Molecular Psychiatry}, doi = {10.1038/mp.2011.138}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-124677}, pages = {960-987}, year = {2012}, abstract = {The adult form of attention deficit/hyperactivity disorder (aADHD) has a prevalence of up to 5\% and is the most severe long-term outcome of this common neurodevelopmental disorder. Family studies in clinical samples suggest an increased familial liability for aADHD compared with childhood ADHD (cADHD), whereas twin studies based on self-rated symptoms in adult population samples show moderate heritability estimates of 30-40\%. However, using multiple sources of information, the heritability of clinically diagnosed aADHD and cADHD is very similar. Results of candidate gene as well as genome-wide molecular genetic studies in aADHD samples implicate some of the same genes involved in ADHD in children, although in some cases different alleles and different genes may be responsible for adult versus childhood ADHD. Linkage studies have been successful in identifying loci for aADHD and led to the identification of LPHN3 and CDH13 as novel genes associated with ADHD across the lifespan. In addition, studies of rare genetic variants have identified probable causative mutations for aADHD. Use of endophenotypes based on neuropsychology and neuroimaging, as well as next-generation genome analysis and improved statistical and bioinformatic analysis methods hold the promise of identifying additional genetic variants involved in disease etiology. Large, international collaborations have paved the way for well-powered studies. Progress in identifying aADHD risk genes may provide us with tools for the prediction of disease progression in the clinic and better treatment, and ultimately may help to prevent persistence of ADHD into adulthood.}, language = {en} } @article{ZayatsJacobsenKleppeetal.2016, author = {Zayats, T and Jacobsen, KK and Kleppe, R and Jacob, CP and Kittel-Schneider, S and Ribas{\´e}s, M and Ramos-Quiroga, JA and Richarte, V and Casas, M and Mota, NR and Grevet, EH and Klein, M and Corominas, J and Bralten, J and Galesloot, T and Vasquez, AA and Herms, S and Forstner, AJ and Larsson, H and Breen, G and Asherson, P and Gross-Lesch, S and Lesch, KP and Cichon, S and Gabrielsen, MB and Holmen, OL and Bau, CHD and Buitelaar, J and Kiemeney, L and Faraone, SV and Cormand, B and Franke, B and Reif, A and Haavik, J and Johansson, S}, title = {Exome chip analyses in adult attention deficit hyperactivity disorder}, series = {Translational Psychiatry}, volume = {6}, journal = {Translational Psychiatry}, number = {e923}, doi = {10.1038/tp.2016.196}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-168297}, year = {2016}, abstract = {Attention-deficit/hyperactivity disorder (ADHD) is a highly heritable childhood-onset neuropsychiatric condition, often persisting into adulthood. The genetic architecture of ADHD, particularly in adults, is largely unknown. We performed an exome-wide scan of adult ADHD using the Illumina Human Exome Bead Chip, which interrogates over 250 000 common and rare variants. Participants were recruited by the International Multicenter persistent ADHD CollaboraTion (IMpACT). Statistical analyses were divided into 3 steps: (1) gene-level analysis of rare variants (minor allele frequency (MAF)<1\%); (2) single marker association tests of common variants (MAF⩾1\%), with replication of the top signals; and (3) pathway analyses. In total, 9365 individuals (1846 cases and 7519 controls) were examined. Replication of the most associated common variants was attempted in 9847 individuals (2077 cases and 7770 controls) using fixed-effects inverse variance meta-analysis. With a Bonferroni-corrected significance level of 1.82E-06, our analyses of rare coding variants revealed four study-wide significant loci: 6q22.1 locus (P=4.46E-08), where NT5DC1 and COL10A1 reside; the SEC23IP locus (P=6.47E-07); the PSD locus (P=7.58E-08) and ZCCHC4 locus (P=1.79E-06). No genome-wide significant association was observed among the common variants. The strongest signal was noted at rs9325032 in PPP2R2B (odds ratio=0.81, P=1.61E-05). Taken together, our data add to the growing evidence of general signal transduction molecules (NT5DC1, PSD, SEC23IP and ZCCHC4) having an important role in the etiology of ADHD. Although the biological implications of these findings need to be further explored, they highlight the possible role of cellular communication as a potential core component in the development of both adult and childhood forms of ADHD.}, language = {en} }