Publication list - Publika - Scientific publications from Oslo University Hospital

Publications by Oleksandr Frei

109 publications found

Original articles

Nordengen K, Cappelletti C, Bahrami S, Frei O, Pihlstrøm L, Henriksen SP, Geut H, Rozemuller AJM, van de Berg WDJ, Andreassen OA, Toft M (2024)
Pleiotropy with sex-specific traits reveals genetic aspects of sex differences in Parkinson's disease
Brain, 147 (3), 858-870
DOI 10.1093/brain/awad297, PubMed 37671566

Parekh P, Fan CC, Frei O, Palmer CE, Smith DM, Makowski C, Iversen JR, Pecheva D, Holland D, Loughnan R, Nedelec P, Thompson WK, Hagler DJ, Andreassen OA, Jernigan TL, Nichols TE, Dale AM (2024)
FEMA: Fast and efficient mixed-effects algorithm for large sample whole-brain imaging data
Hum Brain Mapp, 45 (2), e26579
DOI 10.1002/hbm.26579, PubMed 38339910

Holen B, Kutrolli G, Shadrin AA, Icick R, Hindley G, Rødevand L, O'Connell KS, Frei O, Parker N, Tesfaye M, Deak JD, Jahołkowski P, Dale AM, Djurovic S, Andreassen OA, Smeland OB (2023)
Genome-wide analyses reveal shared genetic architecture and novel risk loci between opioid use disorder and general cognitive ability
Drug Alcohol Depend, 256, 111058
DOI 10.1016/j.drugalcdep.2023.111058, PubMed 38244365

Jaholkowski P, Hindley GFL, Shadrin AA, Tesfaye M, Bahrami S, Nerhus M, Rahman Z, O'Connell KS, Holen B, Parker N, Cheng W, Lin A, Rødevand L, Karadag N, Frei O, Djurovic S, Dale AM, Smeland OB, Andreassen OA (2023)
Genome-wide Association Analysis of Schizophrenia and Vitamin D Levels Shows Shared Genetic Architecture and Identifies Novel Risk Loci
Schizophr Bull, 49 (6), 1654-1664
DOI 10.1093/schbul/sbad063, PubMed 37163672

Parker N, Cheng W, Hindley GFL, Parekh P, Shadrin AA, Maximov II, Smeland OB, Djurovic S, Dale AM, Westlye LT, Frei O, Andreassen OA (2023)
Psychiatric disorders and brain white matter exhibit genetic overlap implicating developmental and neural cell biology
Mol Psychiatry, 28 (11), 4924-4932
DOI 10.1038/s41380-023-02264-z, PubMed 37759039

Rødevand L, Rahman Z, Hindley GFL, Smeland OB, Frei O, Tekin TF, Kutrolli G, Bahrami S, Hoseth EZ, Shadrin A, Lin A, Djurovic S, Dale AM, Steen NE, Andreassen OA (2023)
Characterizing the Shared Genetic Underpinnings of Schizophrenia and Cardiovascular Disease Risk Factors
Am J Psychiatry, 180 (11), 815-826
DOI 10.1176/appi.ajp.20220660, PubMed 37752828

Hope S, Shadrin AA, Lin A, Bahrami S, Rødevand L, Frei O, Hübenette SJ, Cheng W, Hindley G, Nag H, Ulstein L, Efrim-Budisteanu M, O'Connell K, Dale AM, Djurovic S, Nærland T, Andreassen OA (2023)
Bidirectional genetic overlap between autism spectrum disorder and cognitive traits
Transl Psychiatry, 13 (1), 295
DOI 10.1038/s41398-023-02563-7, PubMed 37709755

Steen NE, Rahman Z, Szabo A, Hindley GFL, Parker N, Cheng W, Lin A, O'Connell KS, Sheikh MA, Shadrin A, Bahrami S, Karthikeyan S, Hoseth EZ, Dale AM, Aukrust P, Smeland OB, Ueland T, Frei O, Djurovic S, Andreassen OA (2023)
Shared Genetic Loci Between Schizophrenia and White Blood Cell Counts Suggest Genetically Determined Systemic Immune Abnormalities
Schizophr Bull, 49 (5), 1345-1354
DOI 10.1093/schbul/sbad082, PubMed 37319439

Boen R, Kaufmann T, van der Meer D, Frei O, Agartz I, Ames D, Andersson M, Armstrong NJ, Artiges E, Atkins JR, Bauer J, Benedetti F, Boomsma DI, Brodaty H, Brosch K, Buckner RL, Cairns MJ, Calhoun V, Caspers S, Cichon S, Corvin AP, Crespo-Facorro B, Dannlowski U, David FS, de Geus EJC et al. (2023)
Beyond the Global Brain Differences: Intraindividual Variability Differences in 1q21.1 Distal and 15q11.2 BP1-BP2 Deletion Carriers
Biol Psychiatry, 95 (2), 147-160
DOI 10.1016/j.biopsych.2023.08.018, PubMed 37661008

Bang L, Bahrami S, Hindley G, Smeland OB, Rødevand L, Jaholkowski PP, Shadrin A, Connell KSO, Frei O, Lin A, Rahman Z, Cheng W, Parker N, Fan CC, Dale AM, Djurovic S, Bulik CM, Andreassen OA (2023)
Genome-wide analysis of anorexia nervosa and major psychiatric disorders and related traits reveals genetic overlap and identifies novel risk loci for anorexia nervosa
Transl Psychiatry, 13 (1), 291
DOI 10.1038/s41398-023-02585-1, PubMed 37658054

Hindley G, Drange OK, Lin A, Kutrolli G, Shadrin AA, Parker N, O'Connell KS, Rødevand L, Cheng W, Bahrami S, Karadag N, Holen B, Jaholkowski P, Woldeyohannes MT, Djurovic S, Dale AM, Frei O, Ueland T, Smeland OB, Andreassen OA (2023)
Cross-trait genome-wide association analysis of C-reactive protein level and psychiatric disorders
Psychoneuroendocrinology, 157, 106368
DOI 10.1016/j.psyneuen.2023.106368, PubMed 37659117

Akdeniz BC, Mattingsdal M, Dominguez-Valentin M, Frei O, Shadrin A, Puustusmaa M, Saar R, Sõber S, Møller P, Andreassen OA, Padrik P, Hovig E (2023)
A Breast Cancer Polygenic Risk Score Is Feasible for Risk Stratification in the Norwegian Population
Cancers (Basel), 15 (16)
DOI 10.3390/cancers15164124, PubMed 37627152

Tesfaye M, Jaholkowski P, Hindley GFL, Shadrin AA, Rahman Z, Bahrami S, Lin A, Holen B, Parker N, Cheng W, Rødevand L, Frei O, Djurovic S, Dale AM, Smeland OB, O'Connell KS, Andreassen OA (2023)
Shared genetic architecture between irritable bowel syndrome and psychiatric disorders reveals molecular pathways of the gut-brain axis
Genome Med, 15 (1), 60
DOI 10.1186/s13073-023-01212-4, PubMed 37528461

Karadag N, Shadrin AA, O'Connell KS, Hindley GFL, Rahman Z, Parker N, Bahrami S, Fominykh V, Cheng W, Holen B, Alvestad S, Taubøll E, Steen NE, Djurovic S, Dale AM, Frei O, Andreassen OA, Smeland OB (2023)
Identification of novel genomic risk loci shared between common epilepsies and psychiatric disorders
Brain, 146 (8), 3392-3403
DOI 10.1093/brain/awad038, PubMed 36757824

Jaholkowski P, Shadrin AA, Jangmo A, Frei E, Tesfaye M, Hindley GFL, Haram M, Rahman Z, Athanasiu L, Bakken NR, Holen B, Fominykh V, Kutrolli G, Parekh P, Parker N, Rødevand L, Birkenæs V, Djurovic S, Frei O, O'Connell KS, Smeland OB, Tesli M, Andreassen OA (2023)
Associations Between Symptoms of Premenstrual Disorders and Polygenic Liability for Major Psychiatric Disorders
JAMA Psychiatry, 80 (7), 738-742
DOI 10.1001/jamapsychiatry.2023.1137, PubMed 37163253

Mufford MS, van der Meer D, Kaufmann T, Frei O, Ramesar R, Thompson PM, Jahanshad N, Morey RA, Andreassen OA, Stein DJ, Dalvie S (2023)
The Genetic Architecture of Amygdala Nuclei
Biol Psychiatry, 95 (1), 72-84
DOI 10.1016/j.biopsych.2023.06.022, PubMed 37391117

Hindley G, Shadrin AA, van der Meer D, Parker N, Cheng W, O'Connell KS, Bahrami S, Lin A, Karadag N, Holen B, Bjella T, Deary IJ, Davies G, Hill WD, Bressler J, Seshadri S, Fan CC, Ueland T, Djurovic S, Smeland OB, Frei O, Dale AM, Andreassen OA (2023)
Multivariate genetic analysis of personality and cognitive traits reveals abundant pleiotropy
Nat Hum Behav, 7 (9), 1584-1600
DOI 10.1038/s41562-023-01630-9, PubMed 37365406

Askeland RB, Hannigan LJ, O'Connell KS, Corfield EC, Frei O, Thapar A, Smith GD, Reichborn-Kjennerud T, Andreassen OA, Ask H, Havdahl A (2023)
Developmental manifestations of polygenic risk for bipolar disorder from infancy to middle childhood
Transl Psychiatry, 13 (1), 222
DOI 10.1038/s41398-023-02522-2, PubMed 37353490

Roelfs D, Frei O, van der Meer D, Tissink E, Shadrin A, Alnaes D, Andreassen OA, Westlye LT, Kaufmann T (2023)
Shared genetic architecture between mental health and the brain functional connectome in the UK Biobank
BMC Psychiatry, 23 (1), 461
DOI 10.1186/s12888-023-04905-7, PubMed 37353766

Parker N, Cheng W, Hindley GFL, O'Connell KS, Karthikeyan S, Holen B, Shadrin AA, Rahman Z, Karadag N, Bahrami S, Lin A, Steen NE, Ueland T, Aukrust P, Djurovic S, Dale AM, Smeland OB, Frei O, Andreassen OA (2023)
Genetic Overlap Between Global Cortical Brain Structure, C-Reactive Protein, and White Blood Cell Counts
Biol Psychiatry, 95 (1), 62-71
DOI 10.1016/j.biopsych.2023.06.008, PubMed 37348803

Oddsson A, Sulem P, Sveinbjornsson G, Arnadottir GA, Steinthorsdottir V, Halldorsson GH, Atlason BA, Oskarsson GR, Helgason H, Nielsen HS, Westergaard D, Karjalainen JM, Katrinardottir H, Fridriksdottir R, Jensson BO, Tragante V, Ferkingstad E, Jonsson H, Gudjonsson SA, Beyter D, Moore KHS, Thordardottir HB, Kristmundsdottir S, Stefansson OA, Rantapää-Dahlqvist S et al. (2023)
Deficit of homozygosity among 1.52 million individuals and genetic causes of recessive lethality
Nat Commun, 14 (1), 3453
DOI 10.1038/s41467-023-38951-2, PubMed 37301908

Fominykh V, Shadrin AA, Jaholkowski PP, Bahrami S, Athanasiu L, Wightman DP, Uffelmann E, Posthuma D, Selbæk G, Dale AM, Djurovic S, Frei O, Andreassen OA (2023)
Shared genetic loci between Alzheimer's disease and multiple sclerosis: Crossroads between neurodegeneration and immune system
Neurobiol Dis, 183, 106174
DOI 10.1016/j.nbd.2023.106174, PubMed 37286172

Cheng W, Parker N, Karadag N, Koch E, Hindley G, Icick R, Shadrin A, O'Connell KS, Bjella T, Bahrami S, Rahman Z, Tesfaye M, Jaholkowski P, Rødevand L, Holen B, Lagerberg TV, Steen NE, Djurovic S, Dale AM, Frei O, Smeland OB, Andreassen OA (2023)
The relationship between cannabis use, schizophrenia, and bipolar disorder: a genetically informed study
Lancet Psychiatry, 10 (6), 441-451
DOI 10.1016/S2215-0366(23)00143-8, PubMed 37208114

Holen B, Shadrin AA, Icick R, Filiz TT, Hindley G, Rødevand L, O'Connell KS, Hagen E, Frei O, Bahrami S, Cheng W, Parker N, Tesfaye M, Jahołkowski P, Karadag N, Dale AM, Djurovic S, Smeland OB, Andreassen OA (2023)
Genome-wide analyses reveal novel opioid use disorder loci and genetic overlap with schizophrenia, bipolar disorder, and major depression
Addict Biol, 28 (6), e13282
DOI 10.1111/adb.13282, PubMed 37252880

Leonardsen EH, Vidal-Piñeiro D, Roe JM, Frei O, Shadrin AA, Iakunchykova O, de Lange AG, Kaufmann T, Taschler B, Smith SM, Andreassen OA, Wolfers T, Westlye LT, Wang Y (2023)
Genetic architecture of brain age and its causal relations with brain and mental disorders
Mol Psychiatry, 28 (7), 3111-3120
DOI 10.1038/s41380-023-02087-y, PubMed 37165155

Reas ET, Shadrin A, Frei O, Motazedi E, McEvoy L, Bahrami S, van der Meer D, Makowski C, Loughnan R, Wang X, Broce I, Banks SJ, Fominykh V, Cheng W, Holland D, Smeland OB, Seibert T, Selbaek G, Brewer JB, Fan CC, Andreassen OA, Dale AM, Alzheimer's Disease Neuroimaging Initiative (2023)
Improved multimodal prediction of progression from MCI to Alzheimer's disease combining genetics with quantitative brain MRI and cognitive measures
Alzheimers Dement, 19 (11), 5151-5158
DOI 10.1002/alz.13112, PubMed 37132098

O'Connell KS, Koch E, Lenk HÇ, Akkouh IA, Hindley G, Jaholkowski P, Smith RL, Holen B, Shadrin AA, Frei O, Smeland OB, Steen NE, Dale AM, Molden E, Djurovic S, Andreassen OA (2023)
Polygenic overlap with body-mass index improves prediction of treatment-resistant schizophrenia
Psychiatry Res, 325, 115217
DOI 10.1016/j.psychres.2023.115217, PubMed 37146461

Smith DM, Loughnan R, Friedman NP, Parekh P, Frei O, Thompson WK, Andreassen OA, Neale M, Jernigan TL, Dale AM (2023)
Heritability Estimation of Cognitive Phenotypes in the ABCD Study^® Using Mixed Models
Behav Genet, 53 (3), 169-188
DOI 10.1007/s10519-023-10141-2, PubMed 37024669

Makowski C, Wang H, Srinivasan A, Qi A, Qiu Y, van der Meer D, Frei O, Zou J, Visscher PM, Yang J, Chen CH (2023)
Larger cerebral cortex is genetically correlated with greater frontal area and dorsal thickness
Proc Natl Acad Sci U S A, 120 (11), e2214834120
DOI 10.1073/pnas.2214834120, PubMed 36893272

Boen R, Kaufmann T, Frei O, van der Meer D, Djurovic S, Andreassen OA, Selmer KK, Alnæs D, Sønderby IE (2023)
No signs of neurodegenerative effects in 15q11.2 BP1-BP2 copy number variant carriers in the UK Biobank
Transl Psychiatry, 13 (1), 61
DOI 10.1038/s41398-023-02358-w, PubMed 36807331

Andreassen OA, Hindley GFL, Frei O, Smeland OB (2023)
New insights from the last decade of research in psychiatric genetics: discoveries, challenges and clinical implications
World Psychiatry, 22 (1), 4-24
DOI 10.1002/wps.21034, PubMed 36640404

van der Meer D, Gurholt TP, Sønderby IE, Shadrin AA, Hindley G, Rahman Z, de Lange AG, Frei O, Leinhard OD, Linge J, Simon R, Beck D, Westlye LT, Halvorsen S, Dale AM, Karlsen TH, Kaufmann T, Andreassen OA (2022)
The link between liver fat and cardiometabolic diseases is highlighted by genome-wide association study of MRI-derived measures of body composition
Commun Biol, 5 (1), 1271
DOI 10.1038/s42003-022-04237-4, PubMed 36402844

Loughnan RJ, Shadrin AA, Frei O, van der Meer D, Zhao W, Palmer CE, Thompson WK, Makowski C, Jernigan TL, Andreassen OA, Fan CC, Dale AM (2022)
Generalization of cortical MOSTest genome-wide associations within and across samples
Neuroimage, 263, 119632
DOI 10.1016/j.neuroimage.2022.119632, PubMed 36115590

Cheng W, van der Meer D, Parker N, Hindley G, O'Connell KS, Wang Y, Shadrin AA, Alnæs D, Bahrami S, Lin A, Karadag N, Holen B, Fernandez-Cabello S, Fan CC, Dale AM, Djurovic S, Westlye LT, Frei O, Smeland OB, Andreassen OA (2022)
Shared genetic architecture between schizophrenia and subcortical brain volumes implicates early neurodevelopmental processes and brain development in childhood
Mol Psychiatry, 27 (12), 5167-5176
DOI 10.1038/s41380-022-01751-z, PubMed 36100668

Hindley G, Frei O, Shadrin AA, Cheng W, O'Connell KS, Icick R, Parker N, Bahrami S, Karadag N, Roelfs D, Holen B, Lin A, Fan CC, Djurovic S, Dale AM, Smeland OB, Andreassen OA (2022)
Charting the Landscape of Genetic Overlap Between Mental Disorders and Related Traits Beyond Genetic Correlation
Am J Psychiatry, 179 (11), 833-843
DOI 10.1176/appi.ajp.21101051, PubMed 36069018

Icick R, Shadrin A, Holen B, Karadag N, Lin A, Hindley G, O'Connell K, Frei O, Bahrami S, Høegh MC, Cheng W, Fan CC, Djurovic S, Dale AM, Lagerberg TV, Smeland OB, Andreassen OA (2022)
Genetic overlap between mood instability and alcohol-related phenotypes suggests shared biological underpinnings
Neuropsychopharmacology, 47 (11), 1883-1891
DOI 10.1038/s41386-022-01401-6, PubMed 35953530

Hindley G, O'Connell KS, Rahman Z, Frei O, Bahrami S, Shadrin A, Høegh MC, Cheng W, Karadag N, Lin A, Rødevand L, Fan CC, Djurovic S, Lagerberg TV, Dale AM, Smeland OB, Andreassen OA (2022)
The shared genetic basis of mood instability and psychiatric disorders: A cross-trait genome-wide association analysis
Am J Med Genet B Neuropsychiatr Genet, 189 (6), 207-218
DOI 10.1002/ajmg.b.32907, PubMed 35841185

Bahrami S, Nordengen K, Shadrin AA, Frei O, van der Meer D, Dale AM, Westlye LT, Andreassen OA, Kaufmann T (2022)
Distributed genetic architecture across the hippocampal formation implies common neuropathology across brain disorders
Nat Commun, 13 (1), 3436
DOI 10.1038/s41467-022-31086-w, PubMed 35705537

Torgersen K, Rahman Z, Bahrami S, Hindley GFL, Parker N, Frei O, Shadrin A, O'Connell KS, Tesli M, Smeland OB, Munkhaugen J, Djurovic S, Dammen T, Andreassen OA (2022)
Shared genetic loci between depression and cardiometabolic traits
PLoS Genet, 18 (5), e1010161
DOI 10.1371/journal.pgen.1010161, PubMed 35560157

Fan CC, Loughnan R, Makowski C, Pecheva D, Chen CH, Hagler DJ, Thompson WK, Parker N, van der Meer D, Frei O, Andreassen OA, Dale AM (2022)
Multivariate genome-wide association study on tissue-sensitive diffusion metrics highlights pathways that shape the human brain
Nat Commun, 13 (1), 2423
DOI 10.1038/s41467-022-30110-3, PubMed 35505052

Saevarsdottir S, Stefansdottir L, Sulem P, Thorleifsson G, Ferkingstad E, Rutsdottir G, Glintborg B, Westerlind H, Grondal G, Loft IC, Sorensen SB, Lie BA, Brink M, Ärlestig L, Arnthorsson AO, Baecklund E, Banasik K, Bank S, Bjorkman LI, Ellingsen T, Erikstrup C, Frei O, Gjertsson I, Gudbjartsson DF, Gudjonsson SA et al. (2022)
Multiomics analysis of rheumatoid arthritis yields sequence variants that have large effects on risk of the seropositive subset
Ann Rheum Dis, 81 (8), 1085-1095
DOI 10.1136/annrheumdis-2021-221754, PubMed 35470158

Trubetskoy V, Pardiñas AF, Qi T, Panagiotaropoulou G, Awasthi S, Bigdeli TB, Bryois J, Chen CY, Dennison CA, Hall LS, Lam M, Watanabe K, Frei O, Ge T, Harwood JC, Koopmans F, Magnusson S, Richards AL, Sidorenko J, Wu Y, Zeng J, Grove J, Kim M, Li Z, Voloudakis G et al. (2022)
Mapping genomic loci implicates genes and synaptic biology in schizophrenia
Nature, 604 (7906), 502-508
DOI 10.1038/s41586-022-04434-5, PubMed 35396580

Bahrami S, Hindley G, Winsvold BS, O'Connell KS, Frei O, Shadrin A, Cheng W, Bettella F, Rødevand L, Odegaard KJ, Fan CC, Pirinen MJ, Hautakangas HM, HUNT All-In Headache, Dale AM, Djurovic S, Smeland OB, Andreassen OA (2022)
Dissecting the shared genetic basis of migraine and mental disorders using novel statistical tools
Brain, 145 (1), 142-153
DOI 10.1093/brain/awab267, PubMed 34273149

van der Meer D, Shadrin AA, O'Connell K, Bettella F, Djurovic S, Wolfers T, Alnæs D, Agartz I, Smeland OB, Melle I, Sánchez JM, Linden DEJ, Dale AM, Westlye LT, Andreassen OA, Frei O, Kaufmann T (2022)
Boosting Schizophrenia Genetics by Utilizing Genetic Overlap With Brain Morphology
Biol Psychiatry, 92 (4), 291-298
DOI 10.1016/j.biopsych.2021.12.007, PubMed 35164939

Motazedi E, Cheng W, Thomassen JQ, Frei O, Rongve A, Athanasiu L, Bahrami S, Shadrin A, Ulstein I, Stordal E, Brækhus A, Saltvedt I, Sando SB, O'Connell KS, Hindley G, van der Meer D, Bergh S, Nordestgaard BG, Tybjærg-Hansen A, Bråthen G, Pihlstrøm L, Djurovic S, Frikke-Schmidt R, Fladby T, Aarsland D et al. (2022)
Using Polygenic Hazard Scores to Predict Age at Onset of Alzheimer's Disease in Nordic Populations
J Alzheimers Dis, 88 (4), 1533-1544
DOI 10.3233/JAD-220174, PubMed 35848024

van der Meer D, Kaufmann T, Shadrin AA, Makowski C, Frei O, Roelfs D, Monereo-Sánchez J, Linden DEJ, Rokicki J, Alnæs D, de Leeuw C, Thompson WK, Loughnan R, Fan CC, Westlye LT, Andreassen OA, Dale AM (2021)
The genetic architecture of human cortical folding
Sci Adv, 7 (51), eabj9446
DOI 10.1126/sciadv.abj9446, PubMed 34910505

Pihlstrøm L, Fan CC, Frei O, Tan M, Karunamuni RA, Blauwendraat C, Bandres-Ciga S, Gan-Or Z, Grosset DG, International Parkinson's Disease Genomics Consortium (IPDGC), Dale AM, Seibert TM, Andreassen OA (2021)
Genetic Stratification of Age-Dependent Parkinson's Disease Risk by Polygenic Hazard Score
Mov Disord, 37 (1), 62-69
DOI 10.1002/mds.28808, PubMed 34612543

Wiström ED, O'Connell KS, Karadag N, Bahrami S, Hindley GFL, Lin A, Cheng W, Steen NE, Shadrin A, Frei O, Djurovic S, Dale AM, Andreassen OA, Smeland OB (2021)
Genome-wide analysis reveals genetic overlap between alcohol use behaviours, schizophrenia and bipolar disorder and identifies novel shared risk loci
Addiction, 117 (3), 600-610
DOI 10.1111/add.15680, PubMed 34472679

Shadrin AA, Kaufmann T, van der Meer D, Palmer CE, Makowski C, Loughnan R, Jernigan TL, Seibert TM, Hagler DJ, Smeland OB, Motazedi E, Chu Y, Lin A, Cheng W, Hindley G, Thompson WK, Fan CC, Holland D, Westlye LT, Frei O, Andreassen OA, Dale AM (2021)
Vertex-wise multivariate genome-wide association study identifies 780 unique genetic loci associated with cortical morphology
Neuroimage, 244, 118603
DOI 10.1016/j.neuroimage.2021.118603, PubMed 34560273

Watson HJ, Thornton LM, Yilmaz Z, Baker JH, Coleman JRI, Adan RAH, Alfredsson L, Andreassen OA, Ask H, Berrettini WH, Boehnke M, Boehm I, Boni C, Buehren K, Bulant J, Burghardt R, Chang X, Cichon S, Cone RD, Courtet P, Crow S, Crowley JJ, Danner UN, de Zwaan M, Dedoussis G et al. (2021)
Common Genetic Variation and Age of Onset of Anorexia Nervosa
Biol Psychiatry Glob Open Sci, 2 (4), 368-378
DOI 10.1016/j.bpsgos.2021.09.001, PubMed 36324647

Hindley G, Bahrami S, Steen NE, O'Connell KS, Frei O, Shadrin A, Bettella F, Rødevand L, Fan CC, Dale AM, Djurovic S, Smeland OB, Andreassen OA (2021)
Characterising the shared genetic determinants of bipolar disorder, schizophrenia and risk-taking
Transl Psychiatry, 11 (1), 466
DOI 10.1038/s41398-021-01576-4, PubMed 34497263

Cheng W, Frei O, van der Meer D, Wang Y, O'Connell KS, Chu Y, Bahrami S, Shadrin AA, Alnæs D, Hindley GFL, Lin A, Karadag N, Fan CC, Westlye LT, Kaufmann T, Molden E, Dale AM, Djurovic S, Smeland OB, Andreassen OA (2021)
Genetic Association Between Schizophrenia and Cortical Brain Surface Area and Thickness
JAMA Psychiatry, 78 (9), 1020-1030
DOI 10.1001/jamapsychiatry.2021.1435, PubMed 34160554

Rødevand L, Bahrami S, Frei O, Chu Y, Shadrin A, O'Connell KS, Smeland OB, Elvsåshagen T, Hindley GFL, Djurovic S, Dale AM, Lagerberg TV, Steen NE, Andreassen OA (2021)
Extensive bidirectional genetic overlap between bipolar disorder and cardiovascular disease phenotypes
Transl Psychiatry, 11 (1), 407
DOI 10.1038/s41398-021-01527-z, PubMed 34301917

O'Connell KS, Frei O, Bahrami S, Smeland OB, Bettella F, Cheng W, Chu Y, Hindley G, Lin A, Shadrin A, Barrett EA, Lagerberg TV, Steen NE, Dale AM, Djurovic S, Andreassen OA (2021)
Characterizing the Genetic Overlap Between Psychiatric Disorders and Sleep-Related Phenotypes
Biol Psychiatry, 90 (9), 621-631
DOI 10.1016/j.biopsych.2021.07.007, PubMed 34482950

Monereo-Sánchez J, Schram MT, Frei O, O'Connell K, Shadrin AA, Smeland OB, Westlye LT, Andreassen OA, Kaufmann T, Linden DEJ, van der Meer D (2021)
Genetic Overlap Between Alzheimer's Disease and Depression Mapped Onto the Brain
Front Neurosci, 15, 653130
DOI 10.3389/fnins.2021.653130, PubMed 34290577

Torgersen K, Bahrami S, Frei O, Shadrin A, Connell KSO, Smeland OB, Munkhaugen J, Djurovic S, Dammen T, Andreassen OA (2021)
Shared genetic architecture between neuroticism, coronary artery disease and cardiovascular risk factors
Transl Psychiatry, 11 (1), 368
DOI 10.1038/s41398-021-01466-9, PubMed 34226488

Elvsåshagen T, Shadrin A, Frei O, van der Meer D, Bahrami S, Kumar VJ, Smeland O, Westlye LT, Andreassen OA, Kaufmann T (2021)
The genetic architecture of the human thalamus and its overlap with ten common brain disorders
Nat Commun, 12 (1), 2909
DOI 10.1038/s41467-021-23175-z, PubMed 34006833

Gurholt TP, Kaufmann T, Frei O, Alnæs D, Haukvik UK, van der Meer D, Moberget T, O'Connell KS, Leinhard OD, Linge J, Simon R, Smeland OB, Sønderby IE, Winterton A, Steen NE, Westlye LT, Andreassen OA (2021)
Population-based body-brain mapping links brain morphology with anthropometrics and body composition
Transl Psychiatry, 11 (1), 295
DOI 10.1038/s41398-021-01414-7, PubMed 34006848

Mullins N, Forstner AJ, O'Connell KS, Coombes B, Coleman JRI, Qiao Z, Als TD, Bigdeli TB, Børte S, Bryois J, Charney AW, Drange OK, Gandal MJ, Hagenaars SP, Ikeda M, Kamitaki N, Kim M, Krebs K, Panagiotaropoulou G, Schilder BM, Sloofman LG, Steinberg S, Trubetskoy V, Winsvold BS, Won HH et al. (2021)
Genome-wide association study of more than 40,000 bipolar disorder cases provides new insights into the underlying biology
Nat Genet, 53 (6), 817-829
DOI 10.1038/s41588-021-00857-4, PubMed 34002096

Roelfs D, Alnæs D, Frei O, van der Meer D, Smeland OB, Andreassen OA, Westlye LT, Kaufmann T (2021)
Phenotypically independent profiles relevant to mental health are genetically correlated
Transl Psychiatry, 11 (1), 202
DOI 10.1038/s41398-021-01313-x, PubMed 33795632

Maximov II, van der Meer D, de Lange AG, Kaufmann T, Shadrin A, Frei O, Wolfers T, Westlye LT (2021)
Fast qualitY conTrol meThod foR derIved diffUsion Metrics (YTTRIUM) in big data analysis: U.K. Biobank 18,608 example
Hum Brain Mapp, 42 (10), 3141-3155
DOI 10.1002/hbm.25424, PubMed 33788350

Holland D, Frei O, Desikan R, Fan CC, Shadrin AA, Smeland OB, Andreassen OA, Dale AM (2021)
The genetic architecture of human complex phenotypes is modulated by linkage disequilibrium and heterozygosity
Genetics, 217 (3)
DOI 10.1093/genetics/iyaa046, PubMed 33789345

Sønderby IE, van der Meer D, Moreau C, Kaufmann T, Walters GB, Ellegaard M, Abdellaoui A, Ames D, Amunts K, Andersson M, Armstrong NJ, Bernard M, Blackburn NB, Blangero J, Boomsma DI, Brodaty H, Brouwer RM, Bülow R, Bøen R, Cahn W, Calhoun VD, Caspers S, Ching CRK, Cichon S, Ciufolini S et al. (2021)
1q21.1 distal copy number variants are associated with cerebral and cognitive alterations in humans
Transl Psychiatry, 11 (1), 182
DOI 10.1038/s41398-021-01213-0, PubMed 33753722

O'Connell KS, Sønderby IE, Frei O, van der Meer D, Athanasiu L, Smeland OB, Alnæs D, Kaufmann T, Westlye LT, Steen VM, Andreassen OA, Hughes T, Djurovic S (2021)
Association between complement component 4A expression, cognitive performance and brain imaging measures in UK Biobank
Psychol Med, 52 (15), 1-11 (in press)
DOI 10.1017/S0033291721000179, PubMed 33653435

Bahrami S, Shadrin A, Frei O, O'Connell KS, Bettella F, Krull F, Fan CC, Røssberg JI, Hindley G, Ueland T, Dale AM, Djurovic S, Steen NE, Smeland OB, Andreassen OA (2021)
Genetic loci shared between major depression and intelligence with mixed directions of effect
Nat Hum Behav, 5 (6), 795-801
DOI 10.1038/s41562-020-01031-2, PubMed 33462475

Rødevand L, Bahrami S, Frei O, Lin A, Gani O, Shadrin A, Smeland OB, Connell KSO, Elvsåshagen T, Winterton A, Quintana DS, Hindley GFL, Werner MCF, Djurovic S, Dale AM, Lagerberg TV, Steen NE, Andreassen OA (2021)
Polygenic overlap and shared genetic loci between loneliness, severe mental disorders, and cardiovascular disease risk factors suggest shared molecular mechanisms
Transl Psychiatry, 11 (1), 3
DOI 10.1038/s41398-020-01142-4, PubMed 33414458

Shadrin AA, Mucha S, Ellinghaus D, Makarious MB, Blauwendraat C, Sreelatha AAK, Heras-Garvin A, Ding J, Hammer M, Foubert-Samier A, Meissner WG, Rascol O, Pavy-Le Traon A, Frei O, O'Connell KS, Bahrami S, Schreiber S, Lieb W, Müller-Nurasyid M, Schminke U, Homuth G, Schmidt CO, Nöthen MM, Hoffmann P, Gieger C et al. (2020)
Shared Genetics of Multiple System Atrophy and Inflammatory Bowel Disease
Mov Disord, 36 (2), 449-459
DOI 10.1002/mds.28338, PubMed 33107653

Shadrin AA, Frei O, Smeland OB, Bettella F, O'Connell KS, Gani O, Bahrami S, Uggen TKE, Djurovic S, Holland D, Andreassen OA, Dale AM (2020)
Phenotype-specific differences in polygenicity and effect size distribution across functional annotation categories revealed by AI-MiXeR
Bioinformatics, 36 (18), 4749-4756
DOI 10.1093/bioinformatics/btaa568, PubMed 32539089

van der Meer D, Frei O, Kaufmann T, Shadrin AA, Devor A, Smeland OB, Thompson WK, Fan CC, Holland D, Westlye LT, Andreassen OA, Dale AM (2020)
Author Correction: Understanding the genetic determinants of the brain with MOSTest
Nat Commun, 11 (1), 4700
DOI 10.1038/s41467-020-18628-w, PubMed 32929091

van der Meer D, Frei O, Kaufmann T, Chen CH, Thompson WK, O'Connell KS, Monereo Sánchez J, Linden DEJ, Westlye LT, Dale AM, Andreassen OA (2020)
Quantifying the Polygenic Architecture of the Human Cerebral Cortex: Extensive Genetic Overlap between Cortical Thickness and Surface Area
Cereb Cortex, 30 (10), 5597-5603
DOI 10.1093/cercor/bhaa146, PubMed 32483632

Elvsåshagen T, Bahrami S, van der Meer D, Agartz I, Alnæs D, Barch DM, Baur-Streubel R, Bertolino A, Beyer MK, Blasi G, Borgwardt S, Boye B, Buitelaar J, Bøen E, Celius EG, Cervenka S, Conzelmann A, Coynel D, Di Carlo P, Djurovic S, Eisenacher S, Espeseth T, Fatouros-Bergman H, Flyckt L, Franke B et al. (2020)
The genetic architecture of human brainstem structures and their involvement in common brain disorders
Nat Commun, 11 (1), 4016
DOI 10.1038/s41467-020-17376-1, PubMed 32782260

van der Meer D, Frei O, Kaufmann T, Shadrin AA, Devor A, Smeland OB, Thompson WK, Fan CC, Holland D, Westlye LT, Andreassen OA, Dale AM (2020)
Understanding the genetic determinants of the brain with MOSTest
Nat Commun, 11 (1), 3512
DOI 10.1038/s41467-020-17368-1, PubMed 32665545

Holland D, Frei O, Desikan R, Fan CC, Shadrin AA, Smeland OB, Sundar VS, Thompson P, Andreassen OA, Dale AM (2020)
Beyond SNP heritability: Polygenicity and discoverability of phenotypes estimated with a univariate Gaussian mixture model
PLoS Genet, 16 (5), e1008612
DOI 10.1371/journal.pgen.1008612, PubMed 32427991

Bahrami S, Steen NE, Shadrin A, O'Connell K, Frei O, Bettella F, Wirgenes KV, Krull F, Fan CC, Dale AM, Smeland OB, Djurovic S, Andreassen OA (2020)
Shared Genetic Loci Between Body Mass Index and Major Psychiatric Disorders: A Genome-wide Association Study
JAMA Psychiatry, 77 (5), 503-512
DOI 10.1001/jamapsychiatry.2019.4188, PubMed 31913414

Writing Committee for the ENIGMA-CNV Working Group, van der Meer D, Sønderby IE, Kaufmann T, Walters GB, Abdellaoui A, Ames D, Amunts K, Andersson M, Armstrong NJ, Bernard M, Blackburn NB, Blangero J, Boomsma DI, Brodaty H, Brouwer RM, Bülow R, Cahn W, Calhoun VD, Caspers S, Cavalleri GL, Ching CRK, Cichon S, Ciufolini S, Corvin A et al. (2020)
Association of Copy Number Variation of the 15q11.2 BP1-BP2 Region With Cortical and Subcortical Morphology and Cognition
JAMA Psychiatry, 77 (4), 420-430
DOI 10.1001/jamapsychiatry.2019.3779, PubMed 31665216

Watanabe K, Stringer S, Frei O, Mirkov MU, de Leeuw C, Polderman TJC, van der Sluis S, Andreassen OA, Neale BM, Posthuma D (2020)
Author Correction: A global overview of pleiotropy and genetic architecture in complex traits
Nat Genet, 52 (3), 353
DOI 10.1038/s41588-019-0571-z, PubMed 32029922

Córdova-Palomera A, van der Meer D, Kaufmann T, Bettella F, Wang Y, Alnæs D, Doan NT, Agartz I, Bertolino A, Buitelaar JK, Coynel D, Djurovic S, Dørum ES, Espeseth T, Fazio L, Franke B, Frei O, Håberg A, Le Hellard S, Jönsson EG, Kolskår KK, Lund MJ, Moberget T, Nordvik JE, Nyberg L et al. (2020)
Genetic control of variability in subcortical and intracranial volumes
Mol Psychiatry, 26 (8), 3876-3883
DOI 10.1038/s41380-020-0664-1, PubMed 32047264

Smeland OB, Shadrin A, Bahrami S, Broce I, Tesli M, Frei O, Wirgenes KV, O'Connell KS, Krull F, Bettella F, Steen NE, Sugrue L, Wang Y, Svenningsson P, Sharma M, Pihlstrøm L, Toft M, O'Donovan M, Djurovic S, Desikan R, Dale AM, Andreassen OA (2020)
Genome-wide Association Analysis of Parkinson's Disease and Schizophrenia Reveals Shared Genetic Architecture and Identifies Novel Risk Loci
Biol Psychiatry, 89 (3), 227-235
DOI 10.1016/j.biopsych.2020.01.026, PubMed 32201043

O'Connell KS, Shadrin A, Bahrami S, Smeland OB, Bettella F, Frei O, Krull F, Askeland RB, Walters GB, Davíðsdóttir K, Haraldsdóttir GS, Guðmundsson ÓÓ, Stefánsson H, Fan CC, Steen NE, Reichborn-Kjennerud T, Dale AM, Stefánsson K, Djurovic S, Andreassen OA (2019)
Identification of genetic overlap and novel risk loci for attention-deficit/hyperactivity disorder and bipolar disorder
Mol Psychiatry, 26 (8), 4055-4065
DOI 10.1038/s41380-019-0613-z, PubMed 31792363

O'Connell KS, Shadrin A, Smeland OB, Bahrami S, Frei O, Bettella F, Krull F, Fan CC, Askeland RB, Knudsen GPS, Halmøy A, Steen NE, Ueland T, Walters GB, Davíðsdóttir K, Haraldsdóttir GS, Guðmundsson ÓÓ, Stefánsson H, Reichborn-Kjennerud T, Haavik J, Dale AM, Stefánsson K, Djurovic S, Andreassen OA (2019)
Identification of Genetic Loci Shared Between Attention-Deficit/Hyperactivity Disorder, Intelligence, and Educational Attainment
Biol Psychiatry, 87 (12), 1052-1062
DOI 10.1016/j.biopsych.2019.11.015, PubMed 32061372

Kaufmann T, van der Meer D, Doan NT, Schwarz E, Lund MJ, Agartz I, Alnæs D, Barch DM, Baur-Streubel R, Bertolino A, Bettella F, Beyer MK, Bøen E, Borgwardt S, Brandt CL, Buitelaar J, Celius EG, Cervenka S, Conzelmann A, Córdova-Palomera A, Dale AM, de Quervain DJF, Di Carlo P, Djurovic S, Dørum ES et al. (2019)
Common brain disorders are associated with heritable patterns of apparent aging of the brain
Nat Neurosci, 22 (10), 1617-1623
DOI 10.1038/s41593-019-0471-7, PubMed 31551603

Watanabe K, Stringer S, Frei O, Umićević Mirkov M, de Leeuw C, Polderman TJC, van der Sluis S, Andreassen OA, Neale BM, Posthuma D (2019)
A global overview of pleiotropy and genetic architecture in complex traits
Nat Genet, 51 (9), 1339-1348
DOI 10.1038/s41588-019-0481-0, PubMed 31427789

Frei O, Holland D, Smeland OB, Shadrin AA, Fan CC, Maeland S, O'Connell KS, Wang Y, Djurovic S, Thompson WK, Andreassen OA, Dale AM (2019)
Bivariate causal mixture model quantifies polygenic overlap between complex traits beyond genetic correlation
Nat Commun, 10 (1), 2417
DOI 10.1038/s41467-019-10310-0, PubMed 31160569

Drange OK, Smeland OB, Shadrin AA, Finseth PI, Witoelar A, Frei O, Psychiatric Genomics Consortium Bipolar Disorder Working Group, Wang Y, Hassani S, Djurovic S, Dale AM, Andreassen OA (2019)
Genetic Overlap Between Alzheimer's Disease and Bipolar Disorder Implicates the MARK2 and VAC14 Genes
Front Neurosci, 13, 220
DOI 10.3389/fnins.2019.00220, PubMed 30930738

Smeland OB, Bahrami S, Frei O, Shadrin A, O'Connell K, Savage J, Watanabe K, Krull F, Bettella F, Steen NE, Ueland T, Posthuma D, Djurovic S, Dale AM, Andreassen OA (2019)
Genome-wide analysis reveals extensive genetic overlap between schizophrenia, bipolar disorder, and intelligence
Mol Psychiatry, 25 (4), 844-853
DOI 10.1038/s41380-018-0332-x, PubMed 30610197

van der Meer D, Rokicki J, Kaufmann T, Córdova-Palomera A, Moberget T, Alnæs D, Bettella F, Frei O, Doan NT, Sønderby IE, Smeland OB, Agartz I, Bertolino A, Bralten J, Brandt CL, Buitelaar JK, Djurovic S, van Donkelaar M, Dørum ES, Espeseth T, Faraone SV, Fernández G, Fisher SE, Franke B, Haatveit B et al. (2018)
Brain scans from 21,297 individuals reveal the genetic architecture of hippocampal subfield volumes
Mol Psychiatry, 25 (11), 3053-3065
DOI 10.1038/s41380-018-0262-7, PubMed 30279459

Srinivasan S, Bettella F, Frei O, Hill WD, Wang Y, Witoelar A, Schork AJ, Thompson WK, Davies G, Desikan RS, Deary IJ, Melle I, Ueland T, Dale AM, Djurovic S, Smeland OB, Andreassen OA (2018)
Enrichment of genetic markers of recent human evolution in educational and cognitive traits
Sci Rep, 8 (1), 12585
DOI 10.1038/s41598-018-30387-9, PubMed 30135563

Smeland OB, Wang Y, Frei O, Li W, Hibar DP, Franke B, Bettella F, Witoelar A, Djurovic S, Chen CH, Thompson PM, Dale AM, Andreassen OA (2018)
Genetic Overlap Between Schizophrenia and Volumes of Hippocampus, Putamen, and Intracranial Volume Indicates Shared Molecular Genetic Mechanisms
Schizophr Bull, 44 (4), 854-864
DOI 10.1093/schbul/sbx148, PubMed 29136250

Zuber V, Jönsson EG, Frei O, Witoelar A, Thompson WK, Schork AJ, Bettella F, Wang Y, Djurovic S, Smeland OB, Dieset I, Fanous AH, Desikan RS, Küry S, Bézieau S, Dale AM, Mills IG, Andreassen OA (2018)
Identification of shared genetic variants between schizophrenia and lung cancer
Sci Rep, 8 (1), 674
DOI 10.1038/s41598-017-16481-4, PubMed 29330379

Shadrin AA, Smeland OB, Zayats T, Schork AJ, Frei O, Bettella F, Witoelar A, Li W, Eriksen JA, Krull F, Djurovic S, Faraone SV, Reichborn-Kjennerud T, Thompson WK, Johansson S, Haavik J, Dale AM, Wang Y, Andreassen OA (2017)
Novel Loci Associated With Attention-Deficit/Hyperactivity Disorder Are Revealed by Leveraging Polygenic Overlap With Educational Attainment
J Am Acad Child Adolesc Psychiatry, 57 (2), 86-95
DOI 10.1016/j.jaac.2017.11.013, PubMed 29413154

Smeland OB, Frei O, Kauppi K, Hill WD, Li W, Wang Y, Krull F, Bettella F, Eriksen JA, Witoelar A, Davies G, Fan CC, Thompson WK, Lam M, Lencz T, Chen CH, Ueland T, Jönsson EG, Djurovic S, Deary IJ, Dale AM, Andreassen OA, NeuroCHARGE (Cohorts for Heart and Aging Research in Genomic Epidemiology) Cognitive Working Group (2017)
Identification of Genetic Loci Jointly Influencing Schizophrenia Risk and the Cognitive Traits of Verbal-Numerical Reasoning, Reaction Time, and General Cognitive Function
JAMA Psychiatry, 74 (10), 1065-1075
DOI 10.1001/jamapsychiatry.2017.1986, PubMed 28746715

Smeland OB, Wang Y, Lo MT, Li W, Frei O, Witoelar A, Tesli M, Hinds DA, Tung JY, Djurovic S, Chen CH, Dale AM, Andreassen OA (2017)
Identification of genetic loci shared between schizophrenia and the Big Five personality traits
Sci Rep, 7 (1), 2222
DOI 10.1038/s41598-017-02346-3, PubMed 28533504

Vorontsov K, Frei O, Apishev M, Romov P, Dudarenko M (2015)
BigARTM: Open Source Library for Regularized Multimodal Topic Modeling of Large Collections
COMM COM INF SC, 542, 370-381
DOI 10.1007/978-3-319-26123-2_36

Review articles

Smeland OB, Frei O, Dale AM, Andreassen OA (2020)
The polygenic architecture of schizophrenia - rethinking pathogenesis and nosology
Nat Rev Neurol, 16 (7), 366-379
DOI 10.1038/s41582-020-0364-0, PubMed 32528109

Smeland OB, Frei O, Fan CC, Shadrin A, Dale AM, Andreassen OA (2019)
The emerging pattern of shared polygenic architecture of psychiatric disorders, conceptual and methodological challenges
Psychiatr Genet, 29 (5), 152-159
DOI 10.1097/YPG.0000000000000234, PubMed 31464996

Smeland OB, Frei O, Shadrin A, O'Connell K, Fan CC, Bahrami S, Holland D, Djurovic S, Thompson WK, Dale AM, Andreassen OA (2019)
Discovery of shared genomic loci using the conditional false discovery rate approach
Hum Genet, 139 (1), 85-94
DOI 10.1007/s00439-019-02060-2, PubMed 31520123

Fan CC, Smeland OB, Schork AJ, Chen CH, Holland D, Lo MT, Sundar VS, Frei O, Jernigan TL, Andreassen OA, Dale AM (2018)
Beyond heritability: improving discoverability in imaging genetics
Hum Mol Genet, 27 (R1), R22-R28
DOI 10.1093/hmg/ddy082, PubMed 29522091