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Al-Beltagi M, Saeed NK, Bediwy AS, Bediwy EA, Elbeltagi R. Decoding the genetic landscape of autism: A comprehensive review. World J Clin Pediatr 2024; 13:98468. [DOI: 10.5409/wjcp.v13.i3.98468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2024] [Revised: 07/29/2024] [Accepted: 08/01/2024] [Indexed: 08/30/2024] Open
Abstract
BACKGROUND Autism spectrum disorder (ASD) is a complex neurodevelopmental condition characterized by heterogeneous symptoms and genetic underpinnings. Recent advancements in genetic and epigenetic research have provided insights into the intricate mechanisms contributing to ASD, influencing both diagnosis and therapeutic strategies.
AIM To explore the genetic architecture of ASD, elucidate mechanistic insights into genetic mutations, and examine gene-environment interactions.
METHODS A comprehensive systematic review was conducted, integrating findings from studies on genetic variations, epigenetic mechanisms (such as DNA methylation and histone modifications), and emerging technologies [including Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)-Cas9 and single-cell RNA sequencing]. Relevant articles were identified through systematic searches of databases such as PubMed and Google Scholar.
RESULTS Genetic studies have identified numerous risk genes and mutations associated with ASD, yet many cases remain unexplained by known factors, suggesting undiscovered genetic components. Mechanistic insights into how these genetic mutations impact neural development and brain connectivity are still evolving. Epigenetic modifications, particularly DNA methylation and non-coding RNAs, also play significant roles in ASD pathogenesis. Emerging technologies like CRISPR-Cas9 and advanced bioinformatics are advancing our understanding by enabling precise genetic editing and analysis of complex genomic data.
CONCLUSION Continued research into the genetic and epigenetic underpinnings of ASD is crucial for developing personalized and effective treatments. Collaborative efforts integrating multidisciplinary expertise and international collaborations are essential to address the complexity of ASD and translate genetic discoveries into clinical practice. Addressing unresolved questions and ethical considerations surrounding genetic research will pave the way for improved diagnostic tools and targeted therapies, ultimately enhancing outcomes for individuals affected by ASD.
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Affiliation(s)
- Mohammed Al-Beltagi
- Department of Pediatric, Faculty of Medicine, Tanta University, Alghrabia, Tanta 31511, Egypt
- Department of Pediatric, University Medical Center, King Abdulla Medical City, Arabian Gulf University, Manama 26671, Bahrain
| | - Nermin Kamal Saeed
- Medical Microbiology Section, Department of Pathology, Salmaniya Medical Complex, Ministry of Health, Kingdom of Bahrain, Manama 12, Bahrain
- Medical Microbiology Section, Department of Pathology, Irish Royal College of Surgeon, Muharraq, Busaiteen 15503, Bahrain
| | - Adel Salah Bediwy
- Department of Pulmonology, Faculty of Medicine, Tanta University, Alghrabia, Tanta 31527, Egypt
- Department of Pulmonology, University Medical Center, King Abdulla Medical City, Arabian Gulf University, Manama 26671, Bahrain
| | - Eman A Bediwy
- Internal Medicine, Faculty of Medicine, Tanta University, Algharbia, Tanta 31527, Egypt
| | - Reem Elbeltagi
- Department of Medicine, The Royal College of Surgeons in Ireland-Bahrain, Muharraq, Busiateen 15503, Bahrain
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Konzok J, Gorski M, Winkler TW, Baumeister SE, Warrier V, Leitzmann MF, Baurecht H. Child maltreatment as a transdiagnostic risk factor for the externalizing dimension: a Mendelian randomization study. Mol Psychiatry 2024:10.1038/s41380-024-02700-8. [PMID: 39174650 DOI: 10.1038/s41380-024-02700-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 08/14/2024] [Accepted: 08/15/2024] [Indexed: 08/24/2024]
Abstract
Observational studies suggest that child maltreatment increases the risk of externalizing spectrum disorders such as attention deficit hyperactivity disorder (ADHD), conduct disorder (CD), antisocial personality disorder (ASPD), and substance use disorder (SUD). Yet, only few of such associations have been investigated by approaches that provide strong evidence for causation, such as Mendelian Randomization (MR). Establishing causal inference is essential given the growing recognition of gene-environment correlations, which can confound observational research in the context of childhood maltreatment. Evaluating causality between child maltreatment and the externalizing phenotypes, we used genome-wide association study (GWAS) summary data for child maltreatment (143,473 participants), ADHD (20,183 cases; 35,191 controls), CD (451 cases; 256,859 controls), ASPD (381 cases; 252,877 controls), alcohol use disorder (AUD; 13,422 cases; 244,533 controls), opioid use disorder (OUD; 775 cases; 255,921 controls), and cannabinoid use disorder (CUD; 14,080 cases; 343,726 controls). We also generated a latent variable 'common externalizing factor' (EXT) using genomic structural equation modeling. Genetically predicted childhood maltreatment was consistently associated with ADHD (odds ratio [OR], 10.09; 95%-CI, 4.76-21.40; P = 1.63 × 10-09), AUD (OR, 3.72; 95%-CI, 1.85-7.52; P = 2.42 × 10-04), and the EXT (OR, 2.64; 95%-CI, 1.52-4.60; P = 5.80 × 10-04) across the different analyses and pleiotropy-robust methods. A subsequent GWAS on childhood maltreatment and the externalizing dimension from Externalizing Consortium (EXT-CON) confirmed these results. Two of the top five genes with the strongest associations in EXT GWAS, CADM2 and SEMA6D, are also ranked among the top 10 in the EXT-CON. The present results confirm the existence of a common externalizing factor and an increasing vulnerability caused by child maltreatment, with crucial implications for prevention. However, the partly diverging results also indicate that specific influences impact individual phenotypes separately.
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Affiliation(s)
- Julian Konzok
- Department of Epidemiology and Preventive Medicine, University of Regensburg, Regensburg, Germany.
| | - Mathias Gorski
- Department of Genetic Epidemiology, University of Regensburg, Regensburg, Germany
| | - Thomas W Winkler
- Department of Genetic Epidemiology, University of Regensburg, Regensburg, Germany
| | - Sebastian E Baumeister
- Institute of Health Services Research in Dentistry, University of Münster, Münster, Germany
| | - Varun Warrier
- Department of Psychiatry, University of Cambridge, Cambridge, UK
| | - Michael F Leitzmann
- Department of Epidemiology and Preventive Medicine, University of Regensburg, Regensburg, Germany
| | - Hansjörg Baurecht
- Department of Epidemiology and Preventive Medicine, University of Regensburg, Regensburg, Germany
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3
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Lee S, Robertson OC, Marceau K, Knopik VS, Natsuaki M, Shaw DS, Leve LD, Ganiban JM, Neiderhiser JM. Early risk for child externalising symptoms: Examining genetic, prenatal, temperamental and parental influences. INFANT AND CHILD DEVELOPMENT 2024; 33:e2508. [PMID: 39183803 PMCID: PMC11339911 DOI: 10.1002/icd.2508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 03/25/2024] [Indexed: 08/27/2024]
Abstract
This study utilized the Early Growth and Development Study (N = 561 adoptive children; 57.2% male, 55.3% White), a study of children adopted at birth, to examine heritable (birth parent psychopathology) and prenatal risk (prenatal maternal distress and smoking during pregnancy), infant negative affectivity, adoptive parent over-reactivity and warmth as independent predictors of childhood externalizing symptoms. The current study evaluated if: (1) infant negative affectivity and over-reactive parenting are candidate mediators for the effects of heritable and prenatal risk on externalizing symptoms and (2) parental warmth weakens the influence of heritable risk, prenatal risk, negative affectivity, and over-reactive parenting on externalizing symptoms. There were main effects of heritable risk, infant negative affectivity, and over-reactive parenting on child externalizing symptoms. The study found no support for the hypothesized mediation and moderation effects, suggesting that targeting parental over-reactivity rather than warmth would be more effective in reducing risk for childhood externalizing symptoms.
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Affiliation(s)
- Sohee Lee
- Department of Human Development and Family Science, Purdue University
| | | | - Kristine Marceau
- Department of Human Development and Family Science, Purdue University
| | - Valerie S. Knopik
- Department of Human Development and Family Science, Purdue University
| | - Misaki Natsuaki
- Department of Psychology, University of California, Riverside
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Guimbaud JB, Siskos AP, Sakhi AK, Heude B, Sabidó E, Borràs E, Keun H, Wright J, Julvez J, Urquiza J, Gützkow KB, Chatzi L, Casas M, Bustamante M, Nieuwenhuijsen M, Vrijheid M, López-Vicente M, de Castro Pascual M, Stratakis N, Robinson O, Grazuleviciene R, Slama R, Alemany S, Basagaña X, Plantevit M, Cazabet R, Maitre L. Machine learning-based health environmental-clinical risk scores in European children. COMMUNICATIONS MEDICINE 2024; 4:98. [PMID: 38783062 PMCID: PMC11116423 DOI: 10.1038/s43856-024-00513-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 04/26/2024] [Indexed: 05/25/2024] Open
Abstract
BACKGROUND Early life environmental stressors play an important role in the development of multiple chronic disorders. Previous studies that used environmental risk scores (ERS) to assess the cumulative impact of environmental exposures on health are limited by the diversity of exposures included, especially for early life determinants. We used machine learning methods to build early life exposome risk scores for three health outcomes using environmental, molecular, and clinical data. METHODS In this study, we analyzed data from 1622 mother-child pairs from the HELIX European birth cohorts, using over 300 environmental, 100 child peripheral, and 18 mother-child clinical markers to compute environmental-clinical risk scores (ECRS) for child behavioral difficulties, metabolic syndrome, and lung function. ECRS were computed using LASSO, Random Forest and XGBoost. XGBoost ECRS were selected to extract local feature contributions using Shapley values and derive feature importance and interactions. RESULTS ECRS captured 13%, 50% and 4% of the variance in mental, cardiometabolic, and respiratory health, respectively. We observed no significant differences in predictive performances between the above-mentioned methods.The most important predictive features were maternal stress, noise, and lifestyle exposures for mental health; proteome (mainly IL1B) and metabolome features for cardiometabolic health; child BMI and urine metabolites for respiratory health. CONCLUSIONS Besides their usefulness for epidemiological research, our risk scores show great potential to capture holistic individual level non-hereditary risk associations that can inform practitioners about actionable factors of high-risk children. As in the post-genetic era personalized prevention medicine will focus more and more on modifiable factors, we believe that such integrative approaches will be instrumental in shaping future healthcare paradigms.
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Affiliation(s)
- Jean-Baptiste Guimbaud
- ISGlobal, Barcelona, Spain
- Univ Lyon, UCBL, CNRS, INSA Lyon, LIRIS, UMR5205, F-69622, Villeurbanne, France
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Meersens, Lyon, France
| | - Alexandros P Siskos
- Imperial College London, Cancer Metabolism & Systems Toxicology Group, Division of Cancer, Department of Surgery & Cancer, London, UK
| | | | - Barbara Heude
- Université Paris Cité, Inserm, INRAE, Centre for Research in Epidemiology and StatisticS (CRESS), Paris, France
| | - Eduard Sabidó
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Centre de Regulació Genòmica, Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
| | - Eva Borràs
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Centre de Regulació Genòmica, Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
| | - Hector Keun
- Imperial College London, Cancer Metabolism & Systems Toxicology Group, Division of Cancer, Department of Surgery & Cancer, London, UK
| | - John Wright
- Bradford Institute for Health Research, Bradford, UK
- Bradford Teaching Hospitals NHS Foundation Trust, Bradford, UK
| | - Jordi Julvez
- ISGlobal, Barcelona, Spain
- CIBER Epidemiología Y Salud Pública (CIBERESP), Madrid, Spain
- Institut d'Investigació Sanitària Pere Virgili, Hospital Universitari Sant Joan de Reus, Reus, Spain
| | - Jose Urquiza
- ISGlobal, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología Y Salud Pública (CIBERESP), Madrid, Spain
| | | | - Leda Chatzi
- Department of Preventive Medicine, University of Southern Los Angeles, Los Angeles, CA, USA
| | - Maribel Casas
- ISGlobal, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología Y Salud Pública (CIBERESP), Madrid, Spain
| | - Mariona Bustamante
- ISGlobal, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología Y Salud Pública (CIBERESP), Madrid, Spain
| | | | - Martine Vrijheid
- ISGlobal, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología Y Salud Pública (CIBERESP), Madrid, Spain
| | - Mónica López-Vicente
- ISGlobal, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología Y Salud Pública (CIBERESP), Madrid, Spain
| | - Montserrat de Castro Pascual
- ISGlobal, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología Y Salud Pública (CIBERESP), Madrid, Spain
| | - Nikos Stratakis
- Department of Preventive Medicine, University of Southern Los Angeles, Los Angeles, CA, USA
| | - Oliver Robinson
- Μedical Research Council Centre for Environment and Health, School of Public Health, Imperial College London, London, UK
- Mohn Centre for Children's Health and Well-being, School of Public Health, Imperial College London, London, UK
| | | | - Remy Slama
- Team of Environmental Epidemiology, IAB, Institute for Advanced Biosciences, Inserm, CNRS, CHU-Grenoble-Alpes, University Grenoble-Alpes, Grenoble, France
| | - Silvia Alemany
- Psychiatric Genetics Unit, Group of Psychiatry Mental Health and Addiction, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain
- Department of Mental Health, Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Biomedical Network Research Centre on Mental Health (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain
| | - Xavier Basagaña
- ISGlobal, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología Y Salud Pública (CIBERESP), Madrid, Spain
| | - Marc Plantevit
- EPITA Research Laboratory (LRE), Kremlin-Bicêtre, France
| | - Rémy Cazabet
- Univ Lyon, UCBL, CNRS, INSA Lyon, LIRIS, UMR5205, F-69622, Villeurbanne, France
| | - Léa Maitre
- ISGlobal, Barcelona, Spain.
- Universitat Pompeu Fabra (UPF), Barcelona, Spain.
- CIBER Epidemiología Y Salud Pública (CIBERESP), Madrid, Spain.
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Solberg BS, Kvalvik LG, Instanes JT, Hartman CA, Klungsøyr K, Li L, Larsson H, Magnus P, Njølstad PR, Johansson S, Andreassen OA, Bakken NR, Bekkhus M, Austerberry C, Smajlagic D, Havdahl A, Corfield EC, Haavik J, Gjestad R, Zayats T. Maternal Fiber Intake During Pregnancy and Development of Attention-Deficit/Hyperactivity Disorder Symptoms Across Childhood: The Norwegian Mother, Father, and Child Cohort Study. Biol Psychiatry 2024; 95:839-848. [PMID: 38142720 DOI: 10.1016/j.biopsych.2023.12.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 12/08/2023] [Accepted: 12/13/2023] [Indexed: 12/26/2023]
Abstract
BACKGROUND Epidemiological studies suggest that maternal diet quality during pregnancy may influence the risk of neurodevelopmental disorders in offspring. Here, we investigated associations between maternal intake of dietary fiber and attention-deficit/hyperactivity disorder (ADHD) symptoms in early childhood. METHODS We used longitudinal data of up to 21,852 mother-father-child trios (49.2% female offspring) from MoBa (the Norwegian Mother, Father, and Child Cohort Study). The relationships between maternal fiber intake during pregnancy and offspring ADHD symptoms at ages 3, 5, and 8 years were examined using 1) multivariate regression (overall levels of ADHD symptoms), 2) latent class analysis (subclasses of ADHD symptoms by sex at each age), and 3) latent growth curves (longitudinal change in offspring ADHD symptoms). Covariates were ADHD polygenic scores in child and parents, total energy intake and energy-adjusted sugar intake, parental ages at birth of the child, and sociodemographic factors. RESULTS Higher maternal prenatal fiber intake was associated with lower offspring ADHD symptom scores at all ages (Bage3 = -0.14 [95% CI, -0.18 to -0.10]; Bage5 = -0.14 [95% CI, -0.19 to -0.09]; Bage8 = -0.14 [95% CI, -0.20 to -0.09]). Of the derived low/middle/high subclasses of ADHD symptoms, fiber was associated with lower risk of belonging to the middle subclass for boys and girls and to the high subclass for girls only (middle: odds ratioboys 0.91 [95% CI, 0.86 to 0.97]/odds ratiogirls 0.86 [95% CI, 0.81 to 0.91]; high: odds ratiogirls 0.82 [95% CI, 0.72 to 0.94]). Maternal fiber intake and rate of change in child ADHD symptoms across ages were not associated. CONCLUSIONS Low prenatal maternal fiber intake may increase symptom levels of ADHD in offspring during childhood, independently of genetic predisposition to ADHD, unhealthy dietary exposures, and sociodemographic factors.
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Affiliation(s)
- Berit Skretting Solberg
- Department of Biomedicine, University of Bergen, Norway; Child and Adolescent Psychiatric Outpatient Unit, Hospital Betanien, Bergen, Norway.
| | | | | | - Catharina A Hartman
- Interdisciplinary Center Psychiatry and Emotion Regulation, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Kari Klungsøyr
- Department of Global Public Health and Primary Care, University of Bergen, Norway; Division of Mental and Physical Health, Norwegian Institute of Public Health, Bergen, Norway
| | - Lin Li
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Henrik Larsson
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden; School of Medical Sciences, Örebro University, Örebro, Sweden
| | - Per Magnus
- Centre for Fertility and Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Pål Rasmus Njølstad
- Department of Clinical Science, Mohn Center for Diabetes Precision Medicine, University of Bergen, Bergen, Norway; Children and Youth Clinic, Haukeland University Hospital, Bergen, Norway; Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Stefan Johansson
- Department of Clinical Science, University of Bergen, Bergen, Norway; Department of Medical Genetics, Haukeland University Hospital, Bergen, Norway
| | - Ole A Andreassen
- NORMENT Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Division of Mental Health and Addiciton, Oslo University Hospital, Oslo, Norway
| | - Nora Refsum Bakken
- NORMENT Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Department of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Mona Bekkhus
- Promenta Research Centre, Department of Psychology, University of Oslo, Oslo, Norway
| | - Chloe Austerberry
- Centre for Family Research, University of Cambridge, Cambridge, United Kingdom; Research Department of Clinical, Educational and Health Psychology, University College London, London, United Kingdom
| | - Dinka Smajlagic
- Promenta Research Centre, Department of Psychology, University of Oslo, Oslo, Norway
| | - Alexandra Havdahl
- Promenta Research Centre, Department of Psychology, University of Oslo, Oslo, Norway; Centre for Genetic Epidemiology and Mental Health, Norwegian Institute of Public Health, Oslo, Norway; Nic Waals Institute, Lovisenberg Diakonale Hospital, Oslo, Norway
| | - Elizabeth C Corfield
- Centre for Genetic Epidemiology and Mental Health, Norwegian Institute of Public Health, Oslo, Norway; Nic Waals Institute, Lovisenberg Diakonale Hospital, Oslo, Norway
| | - Jan Haavik
- Department of Biomedicine, University of Bergen, Norway; Bergen Center for Brain Plasticity, Division of Psychiatry, Haukeland University Hospital, Bergen, Norway; Department of Psychiatry, Research Department, Haukeland University Hospital, Bergen, Norway
| | - Rolf Gjestad
- Department of Psychiatry, Research Department, Haukeland University Hospital, Bergen, Norway; Center for Crisis Psychology, Faculty of Psychology, University of Bergen, Bergen, Norway; Centre for Research and Education in Forensic Psychiatry, Haukeland University Hospital, Bergen, Norway
| | - Tetyana Zayats
- Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts; Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, Massachusetts; Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, Massachusetts
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Hosang GM, Shakoor S, King N, Sanches M, Vincent JB, Kennedy JL, McGuffin P, Keers R, Zai CC. Interplay between polygenic risk for mood disorders and stressful life events in bipolar disorder. J Affect Disord 2024; 350:565-572. [PMID: 38246285 DOI: 10.1016/j.jad.2024.01.167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 12/18/2023] [Accepted: 01/16/2024] [Indexed: 01/23/2024]
Abstract
BACKGROUND Although genetic and environmental factors are involved in the aetiology of bipolar disorder [BD], studies focused on their interplay are lacking. The current investigation examines interactions and correlations between polygenic risk scores [PRS] for BD and major depressive disorder [MDD] with stressful life events [SLEs] in liability for BD. METHODS This study used data from 1715 participants (862 bipolar cases and 853 controls) taken from UK and Canadian samples. The List of Threatening Experiences Questionnaire recorded SLEs that occurred 6 months before interview for controls and 6 months prior to the first (Canadian sample) and worst (UK sample) depressive and manic episodes for bipolar cases. PRS-BD and PRS-MDD were calculated from the Psychiatric Genomics Consortium. RESULTS For the worst depressive episode, the PRS-MDD was significantly correlated with total number of SLEs (β = 0.13, 95 % CI:0.04-0.22, p = 0.003) and dependent SLEs (β = 0.09, 95 % CI:0.02-0.16, p = 0.007). After correction for multiple testing nominally significant correlations were detected for PRS-BD with total number of SLEs (β = 0.11, 95 % CI:0.02-0.20, p = 0.015) and dependent SLEs (β = 0.08, 95 % CI:0.01-0.15, p = 0.019). Among bipolar cases, these associations were slightly stronger but were only of nominal significance for total number of SLEs (PRS-MDD: β = 0.19, 95 % CI:0.04-0.35, p = 0.015; PRS-BD: β = 0.16, 95 % CI:0.01-0.32, p = 0.042) and dependent SLEs (PRS-MDD: β = 0.14, 95 % CI:0.03-0.26, p = 0.015; PRS-BD: β = 0.12, 95 % CI:0.004-0.24, p = 0.043). No other significant gene-environment correlations or interactions were found. LIMITATIONS Use of a larger sample size would be beneficial. CONCLUSIONS The relationship between SLEs and genetic risk for mood disorders may be best explained through correlations rather than interactions.
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Affiliation(s)
- Georgina M Hosang
- Centre for Psychiatry & Mental Health, Wolfson Institute of Population Health, Barts and the London Faulty of Medicine and Dentistry, Queen Mary, University of London, UK.
| | - Sania Shakoor
- Centre for Psychiatry & Mental Health, Wolfson Institute of Population Health, Barts and the London Faulty of Medicine and Dentistry, Queen Mary, University of London, UK
| | - Nicole King
- Tanenbaum Centre for Pharmacogenetics, Molecular Brain Science Department, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Canada
| | - Marcos Sanches
- Tanenbaum Centre for Pharmacogenetics, Molecular Brain Science Department, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Canada
| | - John B Vincent
- Molecular Neuropsychiatry and Development (MiND) Laboratory, Molecular Brain Science Department, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada; Department of Psychiatry, University of Toronto, Toronto, Canada
| | - James L Kennedy
- Tanenbaum Centre for Pharmacogenetics, Molecular Brain Science Department, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Canada; Department of Psychiatry, University of Toronto, Toronto, Canada; Institute of Medical Science, University of Toronto, Toronto, Canada
| | - Peter McGuffin
- Social, Genetic & Developmental Psychiatry Centre, Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK
| | - Robert Keers
- Department of Biological and Experimental Psychology, Queen Mary, University of London, UK
| | - Clement C Zai
- Tanenbaum Centre for Pharmacogenetics, Molecular Brain Science Department, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Canada; Department of Psychiatry, University of Toronto, Toronto, Canada; Institute of Medical Science, University of Toronto, Toronto, Canada; Laboratory Medicine and Pathobiology, University of Toronto, Canada; Stanley Center for Psychiatric Research, Broad Institute, Cambridge, MA, USA
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7
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Huang J, Kee MZL, Law EC, Sum KK, Silveira PP, Godfrey KM, Daniel LM, Tan KH, Chong YS, Chan SY, Eriksson JG, Meaney MJ, Huang JY. Parental and child genetic burden of glycaemic dysregulation and early-life cognitive development: an Asian and European prospective cohort study. Transl Psychiatry 2024; 14:2. [PMID: 38177108 PMCID: PMC10766615 DOI: 10.1038/s41398-023-02694-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/27/2023] [Accepted: 11/29/2023] [Indexed: 01/06/2024] Open
Abstract
Insulin resistance and glucose metabolism have been associated with neurodevelopmental disorders. However, in the metabolically more susceptible Asian populations, it is not clear whether the genetic burden of glycaemic dysregulation influences early-life neurodevelopment. In a multi-ethnic Asian prospective cohort study in Singapore (Growing Up in Singapore Towards healthy Outcomes (GUSTO)), we constructed child and parental polygenic risk scores (PRS) for glycaemic dysregulation based on the largest genome-wide association studies of type 2 diabetes and fasting glucose among Asians. We found that child PRS for HOMA-IR was associated with a lower perceptual reasoning score at ~7 years (β = -0. 141, p-value = 0.024, 95% CI -0. 264 to -0. 018) and a lower WIAT-III mean score at ~9 years (β = -0.222, p-value = 0.001, 95% CI -0.357 to -0.087). This association were consistent in direction among boys and girls. These inverse associations were not influenced by parental PRS and were likely mediated via insulin resistance rather than mediators such as birth weight and childhood body mass index. Higher paternal PRS for HOMA-IR was suggestively associated with lower child perceptual reasoning at ~7 years (β = -0.172, p-value = 0.002, 95% CI -0.280 to -0.064). Replication analysis in a European cohort, the Avon Longitudinal Study of Parents and Children (ALSPAC) birth cohort, showed that higher child PRS for fasting glucose was associated with lower verbal IQ score while higher maternal PRS for insulin resistance was associated with lower performance IQ score in their children at ~8.5 years. In summary, our findings suggest that higher child PRS for HOMA-IR was associated with lower cognitive scores in both Asian and European replication cohorts. Differential findings between cohorts may be attributed to genetic and environmental factors. Further investigation of the functions of the genetic structure and ancestry-specific PRS and a more comprehensive investigation of behavioural mediators may help to understand these findings better.
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Affiliation(s)
- Jian Huang
- Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore.
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, Norfolk Place, London, UK.
| | - Michelle Z L Kee
- Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Evelyn C Law
- Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Paediatrics, Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, Singapore, Singapore
| | - Ka Kei Sum
- Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - Patricia Pelufo Silveira
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Psychiatry, Faculty of Medicine and Ludmer Centre for Neuroinformatics and Mental Health, Douglas Hospital Research Centre, McGill University, Montreal, Quebec, Canada
| | - Keith M Godfrey
- MRC Lifecourse Epidemiology Centre and NIHR Southampton Biomedical Research Centre, University of Southampton & University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Lourdes Mary Daniel
- Department of Child Development, KK Women's and Children's Hospital, Singapore, Singapore
| | - Kok Hian Tan
- Department of Maternal Fetal Medicine, KK Women's and Children's Hospital, Singapore, Singapore
| | - Yap Seng Chong
- Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Department of Obstetrics & Gynaecology, National University Health System, Singapore, Singapore
- Yong Loo Lin School of Medicine, Human Potential Translational Research Programme, National University of Singapore, Singapore, Singapore
| | - Shiao-Yng Chan
- Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Yong Loo Lin School of Medicine, Human Potential Translational Research Programme, National University of Singapore, Singapore, Singapore
- Department of Obstetrics & Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Johan G Eriksson
- Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Yong Loo Lin School of Medicine, Human Potential Translational Research Programme, National University of Singapore, Singapore, Singapore
- Department of Obstetrics & Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of general practice and primary health care, University of Helsinki, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
| | - Michael J Meaney
- Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Psychiatry, Faculty of Medicine and Ludmer Centre for Neuroinformatics and Mental Health, Douglas Hospital Research Centre, McGill University, Montreal, Quebec, Canada
- Brain-Body Initiative, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Jonathan Yinhao Huang
- Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore, Singapore
- Thompson School of Social Work & Public Health, Office of Public Health Studies, University of Hawai'i at Mānoa, Honolulu, HI, USA
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8
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Hill KE, Kujawa A, Humphreys KL. Caregivers' positive emotion socialization tendencies are associated with positive affect in preschool age children. Infant Ment Health J 2023; 44:437-447. [PMID: 36840976 PMCID: PMC10198901 DOI: 10.1002/imhj.22036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 01/12/2023] [Indexed: 02/27/2023]
Abstract
Longstanding theories of emotion socialization postulate that caregiver emotional and behavioral reactions to a child's emotions together shape the child's emotion displays over time. Despite the notable importance of positive valence system function, the majority of research on caregiver emotion socialization focuses on negative valence system emotions. In the current project, we leveraged a relatively large cross-sectional study of caregivers (N = 234; 93.59% White) of preschool aged children to investigate whether and to what degree, caregiver (1) emotional experiences, or (2) external behaviors, in the context of preschoolers' positive emotion displays in caregiver-child interactions, are associated with children's general positive affect tendencies. Results indicated that, in the context of everyday caregiver-child interactions, caregiver-reported positively valenced emotions but not approach behaviors were positively associated with child general positive affect tendencies. However, when examining specific caregiver behaviors in response to everyday child positive emotion displays, caregiver report of narrating the child's emotion and joining in the emotion with their child was positively associated with child general positive affect tendencies. Together, these results suggest that in everyday caregiver-child interactions, caregivers' emotional experiences and attunement with the child play a role in shaping preschoolers' overall tendencies toward positive affect.
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Affiliation(s)
- Kaylin E Hill
- Psychology & Human Development, Vanderbilt University, Nashville, Tennessee, USA
| | - Autumn Kujawa
- Psychology & Human Development, Vanderbilt University, Nashville, Tennessee, USA
| | - Kathryn L Humphreys
- Psychology & Human Development, Vanderbilt University, Nashville, Tennessee, USA
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9
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Brinksma DM, Hoekstra PJ, de Bildt A, Buitelaar JK, van den Hoofdakker BJ, Hartman CA, Dietrich A. Parental rejection in early adolescence predicts a persistent ADHD symptom trajectory across adolescence. Eur Child Adolesc Psychiatry 2023; 32:139-153. [PMID: 34275051 PMCID: PMC9908736 DOI: 10.1007/s00787-021-01844-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 07/07/2021] [Indexed: 12/16/2022]
Abstract
Despite a general decrease of attention-deficit/hyperactivity disorder (ADHD) symptoms during adolescence, these may persist in some individuals but not in others. Prior cross-sectional studies have shown that parenting style and their interaction with candidate genes are associated with ADHD symptoms. However, there is a lack of longitudinal research examining the independent and interactive effects of parenting and plasticity genes in predicting the course of attention-deficit/hyperactivity disorder (ADHD) symptoms across adolescence. Here, we investigated how children perceived their parents' parenting style (i.e., rejection, overprotection, and emotional warmth) at the age of 11, and their interaction with DRD4, MAOA, and 5-HTTLPR genotypes on parent-reported ADHD symptoms at three time points (mean ages 11.1, 13.4, and 16.2 years) in 1730 adolescents from the TRacking Adolescents' Individual Lives Survey (TRAILS). Growth Mixture Modeling in Mplus identified four ADHD symptom trajectories: low, moderate stable, high decreasing, and high persistent. Perceived parental rejection predicted class membership in the high persistent trajectory compared to the other classes (p < 0.001, odds ratios between 2.14 and 3.74). Gene-environment interactions were not significantly related to class membership. Our results indicate a role of perceived parental rejection in the persistence of ADHD symptoms. Perceived parental rejection should, therefore, be taken into consideration during prevention and treatment of ADHD in young adolescents.
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Affiliation(s)
- Djûke M Brinksma
- Department of Child and Adolescent Psychiatry, University Medical Center Groningen, University of Groningen, Lübeckweg 2, NL-9723 HE, Groningen, The Netherlands
| | - Pieter J Hoekstra
- Department of Child and Adolescent Psychiatry, University Medical Center Groningen, University of Groningen, Lübeckweg 2, NL-9723 HE, Groningen, The Netherlands
| | - Annelies de Bildt
- Department of Child and Adolescent Psychiatry, University Medical Center Groningen, University of Groningen, Lübeckweg 2, NL-9723 HE, Groningen, The Netherlands
| | - Jan K Buitelaar
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Nijmegen, The Netherlands
- Karakter Child and Adolescent Psychiatry University Centre, Nijmegen, The Netherlands
| | - Barbara J van den Hoofdakker
- Department of Child and Adolescent Psychiatry, University Medical Center Groningen, University of Groningen, Lübeckweg 2, NL-9723 HE, Groningen, The Netherlands
| | - Catharina A Hartman
- Department of Psychiatry, University Medical Center Groningen, University of Groningen, Interdisciplinary Center Psychopathology and Emotion Regulation (ICPE), Groningen, The Netherlands
| | - Andrea Dietrich
- Department of Child and Adolescent Psychiatry, University Medical Center Groningen, University of Groningen, Lübeckweg 2, NL-9723 HE, Groningen, The Netherlands.
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10
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Machlitt-Northen S, Keers R, Munroe PB, Howard DM, Pluess M. Polygenic risk scores for schizophrenia and major depression are associated with socio-economic indicators of adversity in two British community samples. Transl Psychiatry 2022; 12:477. [PMID: 36376270 PMCID: PMC9663827 DOI: 10.1038/s41398-022-02247-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 10/26/2022] [Accepted: 10/31/2022] [Indexed: 11/16/2022] Open
Abstract
Schizophrenia (SCZ) and major depressive disorder (MDD) are complex psychiatric disorders which contribute substantially to the global burden of disease. Both psychopathologies are heritable with some genetic overlap between them. Importantly, SCZ and MDD have also been found to be associated with environmental risk factors. However, rather than being independent of genetic influences, exposure to environmental risk factors may be under genetic control, known as gene-environment correlation (rGE). In this study we investigated rGE in relation to polygenic risk scores for SCZ and MDD in adults, derived from large genome-wide association studies, across two different British community samples: Understanding Society (USoc) and the National Child Development Study (NCDS). We tested whether established environmental risk factors for SCZ and/or MDD are correlated with polygenic scores in adults and whether these associations differ between the two disorders and cohorts. Findings partially overlapped between disorders and cohorts. In NCDS, we identified a significant correlation between the genetic risk for MDD and an indicator of low socio-economic status, but no significant findings emerged for SCZ. In USoc, we replicated associations between indicators of low socio-economic status and the genetic propensity for MDD. In addition, we identified associations between the genetic susceptibility for SCZ and being single or divorced. Results across both studies provide further evidence that the genetic risk for SCZ and MDD were associated with common environmental risk factors, specifically MDD's association with lower socio-economic status.
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Affiliation(s)
- Sandra Machlitt-Northen
- grid.4868.20000 0001 2171 1133Department of Biological and Experimental Psychology, Queen Mary University of London, London, UK
| | - Robert Keers
- grid.4868.20000 0001 2171 1133Department of Biological and Experimental Psychology, Queen Mary University of London, London, UK
| | - Patricia B. Munroe
- grid.4868.20000 0001 2171 1133Department of Clinical Pharmacology, William Harvey Research Institute, Queen Mary University of London, Charterhouse Square, London, UK
| | - David M. Howard
- grid.13097.3c0000 0001 2322 6764Social, Genetic and Developmental Psychiatry Centre, King’s College London, London, UK ,grid.4305.20000 0004 1936 7988Division of Psychiatry, University of Edinburgh, Royal Edinburgh Hospital, Edinburgh, UK
| | - Michael Pluess
- Department of Biological and Experimental Psychology, Queen Mary University of London, London, UK.
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11
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Weinberg A. Pathways to depression: Dynamic associations between neural responses to appetitive cues in the environment, stress, and the development of illness. Psychophysiology 2022; 60:e14193. [PMID: 36256483 DOI: 10.1111/psyp.14193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 09/14/2022] [Accepted: 09/21/2022] [Indexed: 11/30/2022]
Abstract
This review focuses on research my colleagues and I have conducted on etiological pathways to depression. Much of this work has focused on the measurement of neural responses to appetitive cues, using two event-related brain potential (ERP) components, the Late Positive Potential (LPP) and the Reward Positivity (RewP). Reductions in each of these components have been associated with current symptoms of depression, and in some cases have been shown to differentiate anxious from depressive phenotypes. In this review, I will describe three broad and related approaches we have taken in our research to address a series of interdependent issuess. The first attempts to understand different sources of variation in the LPP and RewP, and how these sources interact with one another. The second tries to identify whether variation in the processes measured by these ERP components might reflect a latent vulnerability to depression and its symptoms, that is evident prior to illness onset. And the third examines the possibility that the processes reflected in the LPP and RewP might play a mechanistic role in the development of depression.
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Affiliation(s)
- Anna Weinberg
- Department of Psychology, McGill University, Montreal, Quebec, Canada
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12
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Machlitt‐Northen S, Keers R, Munroe PB, Howard DM, Trubetskoy V, Pluess M. Polygenic scores for schizophrenia and major depression are associated with psychosocial risk factors in children: evidence of gene-environment correlation. J Child Psychol Psychiatry 2022; 63:1140-1152. [PMID: 35781881 PMCID: PMC9796489 DOI: 10.1111/jcpp.13657] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/20/2022] [Indexed: 01/02/2023]
Abstract
BACKGROUND Whilst genetic and environmental risk factors for schizophrenia (SCZ) and major depressive disorder (MDD) have been established, it is unclear whether exposure to environmental risk factors is genetically confounded by passive, evocative or active gene-environment correlation (rGE). STUDY OBJECTIVE This study aims to investigate: (a) whether the genetic risk for SCZ/MDD in children is correlated with established environmental and psychosocial risk factors in two British community samples, the 1958 National Child Development Study (NCDS) and the Millennium Cohort Study (MCS), (b) whether these associations vary between both psychopathologies, and (c) whether findings differ across the two cohorts which were born 42 years apart. METHODS Polygenic risk scores (PRS) from existing large genome-wide associations studies (GWAS) were applied to test the correlation between the child genetic risk for SCZ/MDD and known environmental risk factors. In addition, parental and child genetic data from MCS were used to distinguish between passive and evocative rGE. RESULTS The child polygenic risk for SCZ and MDD was correlated with single parenthood in MCS. Moreover, the lack of father's involvement in child care was associated with the genetic risk for SCZ in NCDS. However, we also found associations between several indicators of low socioeconomic status and heightened genetic risk for MDD in children in both cohorts. Further, the genetic risk for MDD was associated with parental lack of interest in the child's education in NCDS as well as more maternal smoking and less maternal alcohol consumption during childhood in MCS. According to sensitivity analyses in MCS (controlling for parental genotype), more than half of our significant correlations reflected passive rGE. CONCLUSIONS Findings suggest that several established environmental and psychosocial risk factors for SCZ and MDD are at least partially associated with children's genetic risk for these psychiatric disorders.
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Affiliation(s)
| | - Robert Keers
- Department of Biological and Experimental PsychologyQueen Mary University of LondonLondonUK
| | - Patricia B. Munroe
- Department of Clinical Pharmacology, William Harvey Research InstituteQueen Mary University of LondonLondonUK
| | - David M. Howard
- Social, Genetic and Developmental Psychiatry CentreKing's College LondonLondonUK
- Division of PsychiatryUniversity of Edinburgh, Royal Edinburgh HospitalEdinburghUK
| | - Vassily Trubetskoy
- Department of Psychiatry and PsychotherapyUniversitätsmedizin Berlin Campus Charité MitteBerlinGermany
| | - Michael Pluess
- Department of Biological and Experimental PsychologyQueen Mary University of LondonLondonUK
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13
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The effect of parental food neophobia on Children's fruit and vegetable consumption: A serial mediation model. Appetite 2022; 172:105942. [DOI: 10.1016/j.appet.2022.105942] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 11/30/2021] [Accepted: 01/17/2022] [Indexed: 11/17/2022]
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14
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Iob E, Baldwin JR, Plomin R, Steptoe A. Adverse childhood experiences, daytime salivary cortisol, and depressive symptoms in early adulthood: a longitudinal genetically informed twin study. Transl Psychiatry 2021; 11:420. [PMID: 34354040 PMCID: PMC8342545 DOI: 10.1038/s41398-021-01538-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 07/12/2021] [Accepted: 07/23/2021] [Indexed: 12/26/2022] Open
Abstract
Dysregulated hypothalamic-pituitary-adrenal (HPA)-axis function might underlie the relationship between adverse childhood experiences (ACEs) and depression. However, limited research has examined the possible mediating role of the HPA-axis among young people using longitudinal data. Moreover, it remains unclear whether genetic influences could contribute to these associations. Participants were 290 children from the Twins Early Development Study. ACEs were assessed from age 3-11 years. We calculated a cumulative risk score and also derived different ACEs clusters using factor analysis and latent class analysis. HPA-axis activity was indexed by daytime salivary cortisol at age 11. Depressive symptoms were ascertained at age 21. Genetic liability to altered cortisol levels and elevated depressive symptoms was measured using a twin-based method. We performed causal mediation analysis with mixed-effects regression models. The results showed that ACEs cumulative exposure (b = -0.20, p = 0.03), bullying (b = -0.61, p = 0.01), and emotional abuse (b = -0.84, p = 0.02) were associated with lower cortisol levels at age 11. Among participants exposed to multiple ACEs, lower cortisol was related to higher depressive symptoms at age 21 (b = -0.56, p = 0.05). Lower cortisol levels mediated around 10-20% of the total associations of ACEs cumulative exposure, bullying, and dysfunctional parenting/emotional abuse with higher depressive symptoms. Genetic factors contributed to these associations, but the mediation effects of cortisol in the associations of ACEs cumulative exposure (b = 0.16 [0.02-0.34]) and bullying (b = 0.18 [0.01-0.43]) remained when genetic confounding was accounted for. In conclusion, ACEs were linked to elevated depressive symptoms in early adulthood partly through lower cortisol levels in early adolescence, and these relationships were independent of genetic confounding.
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Affiliation(s)
- Eleonora Iob
- Research Department of Behavioural Science and Health, Institute of Epidemiology and Healthcare, University College London, London, UK.
| | - Jessie R. Baldwin
- grid.83440.3b0000000121901201Division of Psychology and Language Sciences, University College London, London, UK ,grid.13097.3c0000 0001 2322 6764Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King’s College London, London, UK
| | - Robert Plomin
- grid.13097.3c0000 0001 2322 6764Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King’s College London, London, UK
| | - Andrew Steptoe
- grid.83440.3b0000000121901201Research Department of Behavioural Science and Health, Institute of Epidemiology and Healthcare, University College London, London, UK
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15
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Sallis HM, Croft J, Havdahl A, Jones HJ, Dunn EC, Davey Smith G, Zammit S, Munafò MR. Genetic liability to schizophrenia is associated with exposure to traumatic events in childhood. Psychol Med 2021; 51:1814-1821. [PMID: 32234096 PMCID: PMC8381289 DOI: 10.1017/s0033291720000537] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 02/04/2020] [Accepted: 02/25/2020] [Indexed: 01/13/2023]
Abstract
BACKGROUND There is a wealth of literature on the observed association between childhood trauma and psychotic illness. However, the relationship between childhood trauma and psychosis is complex and could be explained, in part, by gene-environment correlation. METHODS The association between schizophrenia polygenic scores (PGS) and experiencing childhood trauma was investigated using data from the Avon Longitudinal Study of Parents and Children (ALSPAC) and the Norwegian Mother, Father and Child Cohort Study (MoBa). Schizophrenia PGS were derived in each cohort for children, mothers, and fathers where genetic data were available. Measures of trauma exposure were derived based on data collected throughout childhood and adolescence (0-17 years; ALSPAC) and at age 8 years (MoBa). RESULTS Within ALSPAC, we found a positive association between schizophrenia PGS and exposure to trauma across childhood and adolescence; effect sizes were consistent for both child or maternal PGS. We found evidence of an association between the schizophrenia PGS and the majority of trauma subtypes investigated, with the exception of bullying. These results were comparable with those of MoBa. Within ALSPAC, genetic liability to a range of additional psychiatric traits was also associated with a greater trauma exposure. CONCLUSIONS Results from two international birth cohorts indicate that genetic liability for a range of psychiatric traits is associated with experiencing childhood trauma. Genome-wide association study of psychiatric phenotypes may also reflect risk factors for these phenotypes. Our findings also suggest that youth at higher genetic risk might require greater resources/support to ensure they grow-up in a healthy environment.
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Affiliation(s)
- Hannah M. Sallis
- Centre for Academic Mental Health, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
- UK Centre for Tobacco and Alcohol Studies, School of Psychological Science, University of Bristol, Bristol, UK
- NIHR Biomedical Research Centre, University Hospitals Bristol NHS Foundation Trust and University of Bristol, Bristol, UK
| | - Jazz Croft
- Centre for Academic Mental Health, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - Alexandra Havdahl
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
- Nic Waals Institute, Lovisenberg Diaconal Hospital, Oslo0853, Norway
- Department of Mental Disorders, Norwegian Institute of Public Health, OsloN-0213, Norway
| | - Hannah J. Jones
- Centre for Academic Mental Health, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- NIHR Biomedical Research Centre, University Hospitals Bristol NHS Foundation Trust and University of Bristol, Bristol, UK
| | - Erin C. Dunn
- Psychiatric and Neurodevelopmental Genetics Unit, Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
- Department of Psychiatry, Harvard Medical School, Boston, MA, USA
- Broad Institute of Harvard and MIT, Cambridge, MA, USA
| | - George Davey Smith
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
- NIHR Biomedical Research Centre, University Hospitals Bristol NHS Foundation Trust and University of Bristol, Bristol, UK
| | - Stanley Zammit
- Centre for Academic Mental Health, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- NIHR Biomedical Research Centre, University Hospitals Bristol NHS Foundation Trust and University of Bristol, Bristol, UK
- MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University, Cardiff, UK
| | - Marcus R. Munafò
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
- UK Centre for Tobacco and Alcohol Studies, School of Psychological Science, University of Bristol, Bristol, UK
- NIHR Biomedical Research Centre, University Hospitals Bristol NHS Foundation Trust and University of Bristol, Bristol, UK
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16
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Dalvie S, Daskalakis NP. The Biological Effects of Trauma. Complex Psychiatry 2021; 7:16-18. [PMID: 35592091 PMCID: PMC8443929 DOI: 10.1159/000517236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 05/15/2021] [Indexed: 04/04/2024] Open
Affiliation(s)
- Shareefa Dalvie
- Department of Psychiatry and Neuroscience Institute, University of Cape Town, Cape Town, South Africa
- Department of Paediatrics and Child Health, University of Cape Town, Cape Town, South Africa
| | - Nikolaos P. Daskalakis
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
- Department of Psychiatry, McLean Hospital, Harvard Medical School, Belmont, California, USA
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17
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Chaiyachati BH, Gur RE. Effect of child abuse and neglect on schizophrenia and other psychotic disorders. Pharmacol Biochem Behav 2021; 206:173195. [PMID: 33961909 PMCID: PMC10961915 DOI: 10.1016/j.pbb.2021.173195] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/20/2021] [Accepted: 04/29/2021] [Indexed: 12/25/2022]
Abstract
Childhood experiences impact long-term physical and behavioral health outcomes including potential risk for schizophrenia and psychosis. Negative experiences, such as child abuse and neglect, have been specifically associated with risk for schizophrenia and psychosis. This review provides a brief overview of child abuse and neglect, including its position within the larger field of trauma and adversity and its long term consequences. The link to schizophrenia is then explored. Principles of treatment and outcomes for schizophrenia with antecedent child abuse and neglect are then reviewed. Finally, next steps and points of prevention are highlighted.
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Affiliation(s)
- Barbara H Chaiyachati
- The Children's Hospital of Philadelphia, Philadelphia, PA, United States of America; The University of Pennsylvania, Lifespan Brain Institute of Penn-Medicine and CHOP, Philadelphia, PA, United States of America; The Center for Pediatric Clinical Effectiveness and Center for Applied Genomics, The Children's Hospital of Philadelphia, Philadelphia, PA, United States of America; The Leonard Davis Institute, University of Pennsylvania, Philadelphia, PA, United States of America.
| | - Raquel E Gur
- The Children's Hospital of Philadelphia, Philadelphia, PA, United States of America; The University of Pennsylvania, Lifespan Brain Institute of Penn-Medicine and CHOP, Philadelphia, PA, United States of America
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18
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Saunders GRB, Liu M, Vrieze S, McGue M, Iacono WG. Mechanisms of parent-child transmission of tobacco and alcohol use with polygenic risk scores: Evidence for a genetic nurture effect. Dev Psychol 2021; 57:796-804. [PMID: 34166022 PMCID: PMC8238311 DOI: 10.1037/dev0001028] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Parent-child similarity is a function of genetic and environmental transmission. In addition, genetic effects not transmitted to offspring may drive parental behavior, thereby affecting the rearing environment of the child. Measuring genetic proclivity directly, through polygenic risk scores (PRSs), provides a way to test for the effect of nontransmitted parental genotype, on offspring outcome, termed a genetic nurture effect-in other words, if and how parental genomes might affect their children through the environment. The current study used polygenic risk scores for smoking initiation, cigarettes per day, and drinks per week to predict substance use in a sample of 3,008 twins, assessed prospectively from age 17-29, and their parents, from the Minnesota Center for Twin and Family Research. Mixed-effects models were used to test for a genetic nurture effect whereby parental PRSs predict offspring tobacco and alcohol use after statistically adjusting for offspring's own PRS. Parental smoking initiation PRS predicted offspring cigarettes per day at age 24 (β = .103, 95% CI [.03, .17]) and alcohol use at age 17 (β = .091, 95% CI [.04, .14]) independent of shared genetics. There was also a suggestive independent association between the parent PRS and offspring smoking at age 17 (β = .096; 95% CI [.02, .17]). Mediation analyses provided some evidence for environmental effects of parental smoking, alcohol use, and family socioeconomic status. These findings, and more broadly the molecular genetic method used, have implications on the identification of environmental effects on developmental outcomes such as substance use. (PsycInfo Database Record (c) 2021 APA, all rights reserved).
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Affiliation(s)
| | - Mengzhen Liu
- Department of Psychology, University of Minnesota
| | - Scott Vrieze
- Department of Psychology, University of Minnesota
| | - Matt McGue
- Department of Psychology, University of Minnesota
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19
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Nature and nurture? A review of the literature on childhood maltreatment and genetic factors in the pathogenesis of borderline personality disorder. J Psychiatr Res 2021; 137:131-146. [PMID: 33677217 DOI: 10.1016/j.jpsychires.2020.12.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 11/22/2020] [Accepted: 12/09/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND Borderline Personality Disorder (BPD) is a psychiatric disorder associated with significant morbidity and mortality. However, the neurobiological alterations underlying the condition remain poorly understood. As a result, existing treatments remain inadequate. One of the main risk factors for the development of BPD is a history of childhood maltreatment. However, it is considered neither causative nor specific to the condition. Current theory is therefore increasingly moving toward a 'Gene x Environment' (GxE) model of the condition. The purpose of the current work was to conduct a systematic literature review, which comprehensively identifies all published molecular level GxE studies that have explored the role of specific genetic loci, in influencing the risk of BPD following exposure to childhood abuse or neglect. METHODS Four electronic databases were used to systematically search for molecular level GxE studies of any design, which focused on the development of BPD following exposure to childhood abuse or neglect, without language or date restrictions. Articles were screened independently by two reviewers and results were synthesized narratively. RESULTS A total of 473 articles were screened of which sixteen were selected for inclusion in our review. Implicated genes were categorised according to their influence on; Neurotransmitter Systems, Neurodevelopment and Neuroendocrine Systems. CONCLUSIONS The identified studies have produced several relevant and statistically significant results. Of particular note, is the repeated finding that genes involved in HPA axis regulation, may be altered by exposure to childhood maltreatment, influencing subsequent susceptibility to BPD. This is both biologically plausible and of potential clinical significance.
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Thapar A, Rice F. Family-Based Designs that Disentangle Inherited Factors from Pre- and Postnatal Environmental Exposures: In Vitro Fertilization, Discordant Sibling Pairs, Maternal versus Paternal Comparisons, and Adoption Designs. Cold Spring Harb Perspect Med 2021; 11:cshperspect.a038877. [PMID: 32152247 PMCID: PMC7919395 DOI: 10.1101/cshperspect.a038877] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Identifying environmental risk and protective exposures that have causal effects on health is an important scientific goal. Many environmental exposures are nonrandomly allocated and influenced by dispositional factors including inherited ones. We review family-based designs that can separate the influence of environmental exposures from inherited influences shared between parent and offspring. We focus on prenatal exposures. We highlight that the family-based designs that can separate the prenatal environment from inherited confounds are different to those that are able to pull apart later-life environmental exposures from inherited confounds. We provide a brief review of the literature on maternal smoking during pregnancy and offspring attention-deficit/hyperactivity disorder (ADHD) and conduct problems; these inconsistencies in the literature make a review useful and this illustrates that results of family-based genetically informed studies are inconsistent with a causal interpretation for this exposure and these two offspring outcomes.
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Affiliation(s)
- Anita Thapar
- Child and Adolescent Psychiatry Section, Division of Psychological Medicine and Clinical Neurosciences, MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University School of Medicine, Cardiff CF24 4HQ, United Kingdom
| | - Frances Rice
- Child and Adolescent Psychiatry Section, Division of Psychological Medicine and Clinical Neurosciences, MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University School of Medicine, Cardiff CF24 4HQ, United Kingdom
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21
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Driver MN, Kuo SIC, Dick DM. Genetic feedback for psychiatric conditions: Where are we now and where are we going. Am J Med Genet B Neuropsychiatr Genet 2020; 183:423-432. [PMID: 32812348 PMCID: PMC8108123 DOI: 10.1002/ajmg.b.32815] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 06/12/2020] [Accepted: 07/16/2020] [Indexed: 12/29/2022]
Abstract
Genome-wide association studies are rapidly advancing our understanding of the genetic architecture of complex disorders, including many psychiatric conditions such as major depression, schizophrenia, and substance use disorders. One common goal of genome-wide association studies is to use findings for enhanced clinical prediction in the future, which can aid in identifying at-risk individuals to enable more effective prevention screening and treatment strategies. In order to achieve this goal, we first need to gain a better understanding of the issues surrounding the return of complex genetic results. In this article, we summarize the current literature on: (a) genetic literacy in the general population, (b) the public's interest in receiving genetic test results for psychiatric conditions, (c) how individuals react to and interpret their genotypic information for specific psychiatric conditions, and (d) gaps in our knowledge that will be critical to address as we move toward returning genotypic information for psychiatric conditions in both research and clinical settings. By reviewing extant studies, we aim to increase awareness of the potential benefits and consequences of returning genotypic information for psychiatric conditions.
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Affiliation(s)
- Morgan N. Driver
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia
| | - Sally I-Chun Kuo
- Department of Psychology, Virginia Commonwealth University, Richmond, Virginia
| | - Danielle M. Dick
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, Virginia,Department of Psychology, Virginia Commonwealth University, Richmond, Virginia
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22
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Womersley JS, Hemmings SMJ, Ziegler C, Gutridge A, Ahmed-Leitao F, Rosenstein D, Domschke K, Seedat S. Childhood emotional neglect and oxytocin receptor variants: Association with limbic brain volumes. World J Biol Psychiatry 2020; 21:513-528. [PMID: 30806136 DOI: 10.1080/15622975.2019.1584331] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Objectives: Childhood emotional neglect (EN) is a predictor for the development of affective disorders. Oxytocin (OXT) may mediate the interplay between EN and changes in stress biological systems, brain development, and mental health outcomes. We investigated, in a cross-sectional study, the associations between EN, (epi)genetic variation in the OXT receptor (OXTR) gene, and amygdalar and hippocampal volumes, two brain regions implicated in emotional processing.Methods: We recruited 63 Caucasian South African adults (35 women) with and without social anxiety disorder. Childhood EN was assessed using the Childhood Trauma Questionnaire. rs53576 and rs2254298 genotypes, as well as methylation status, was determined using DNA purified from whole blood. Bilateral amygdalar and hippocampal volumes were determined by structural magnetic resonance imaging. The relationships between these variables were investigated using linear regression.Results: The interaction of the rs2254298 A risk allele and EN was nominally associated with reduced left hippocampal volume. The rs2254298 A risk allele was independently associated with reduced bilateral amygdalar volumes. We found no association between EN, OXTR methylation and amygdalar or hippocampal volumes. The rs53576 GG risk genotype was, however, associated with decreased OXTR methylation.Conclusions: The rs2254298 A allele may increase susceptibility to the structural brain effects of EN.
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Affiliation(s)
- Jacqueline Samantha Womersley
- Department of Psychiatry, Faculty of Medicine and Health Sciences, University of Stellenbosch, Tygerberg, 7505, South Africa
| | - Sian Megan Joanna Hemmings
- Department of Psychiatry, Faculty of Medicine and Health Sciences, University of Stellenbosch, Tygerberg, 7505, South Africa
| | - Christiane Ziegler
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, 70104, Freiburg, Germany
| | - Ashley Gutridge
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Stellenbosch, Tygerberg, 7505, South Africa
| | - Fatima Ahmed-Leitao
- Department of Psychiatry, Faculty of Medicine and Health Sciences, University of Stellenbosch, Tygerberg, 7505, South Africa
| | - David Rosenstein
- Department of Psychiatry, Faculty of Medicine and Health Sciences, University of Stellenbosch, Tygerberg, 7505, South Africa
| | - Katharina Domschke
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, 70104, Freiburg, Germany
| | - Soraya Seedat
- Department of Psychiatry, Faculty of Medicine and Health Sciences, University of Stellenbosch, Tygerberg, 7505, South Africa
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23
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Abstract
AbstractDebates concerning whether Attention Deficit/Hyperactivity Disorder (ADHD) mitigates responsibility often involve recourse to its genetic and neurodevelopmental etiology. For such arguments, individuals with ADHD have diminished self-control, and hence do not fully satisfy the control condition for responsibility, when there is a genetic or neurodevelopmental etiology for this diminished capacity. In this article, I argue that the role of genetic and neurobiological explanations has been overstated in evaluations of responsibility. While ADHD has genetic and neurobiological causes, rather than embrace the essentialistic notion that it directly diminishes self-control and, therefore, responsibility, we ought to think of ADHD as constraining only some self-control practices. In particular, situational self-control strategies remain feasible for people with ADHD. However, not all individuals have access to these strategies. I suggest a way to evaluate responsibility in terms of situational rather than agential pleas, which tracks whether the individual had access to self-control behaviors. While I restrict my discussion to ADHD, the access-based approach is also relevant for assessments of responsibility for other cases where self-control failures are at stake.
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24
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Enthoven CA, Tideman JWL, Polling JR, Tedja MS, Raat H, Iglesias AI, Verhoeven VJM, Klaver CCW. Interaction between lifestyle and genetic susceptibility in myopia: the Generation R study. Eur J Epidemiol 2019; 34:777-784. [PMID: 30945054 PMCID: PMC6602996 DOI: 10.1007/s10654-019-00512-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 03/12/2019] [Indexed: 01/08/2023]
Abstract
Myopia is a refractive error of the eye caused by a complex interplay between nature and nurture. The aim of this study was to investigate whether environmental risk factors can influence the genetic effect in children developing myopia. A total of 3422 children participating in the birth-cohort study Generation R underwent an extensive eye examination at 9 years with measurements of refractive error and axial length corneal radius ratio (AL/CR). Environmental risk factors were evaluated using a questionnaire, and environmental risk scores (ERS) were calculated using backward regression analyses.
Genetic risk scores (GRS) were calculated based on all currently known risk variants for myopia. Gene-environment interaction (G×E) was investigated using linear and logistic regression analyses. The predictive value of G×E and parental myopia was estimated using receiver operating characteristic curves. Myopia prevalence was 12%. Both GRS (P < 0.01) and ERS (P < 0.01) were significantly associated with myopia and AL/CR, as was G×E interaction (P < 0.01 for myopia; P = 0.07 for AL/CR). The predictive value of parental myopia was 0.67 (95% CI 0.65–0.70), similar to the values of GRS (0.67; 95% CI 0.64–0.70; P = 0.98) and ERS (0.69; 95% CI 0.66–0.72; P = 0.98). Adding G×E interaction significantly improved the predictive value to 0.73 (95% CI 0.70–0.75; P < 0.01). This study provides evidence that nature and nurture are equally important for myopia and AL/CR; however, the combination has the strongest influence. Since myopia genes are common in the population, adjustment of lifestyle should be a major focus in the prevention of myopia.
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Affiliation(s)
- Clair A Enthoven
- Department of Ophthalmology, Erasmus University Medical Centre, Room Na-2808, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus University Medical Centre, Rotterdam, The Netherlands.,The Generation R Study Group, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - Jan Willem Lodewijk Tideman
- Department of Ophthalmology, Erasmus University Medical Centre, Room Na-2808, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus University Medical Centre, Rotterdam, The Netherlands.,The Generation R Study Group, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - Jan Roelof Polling
- Department of Ophthalmology, Erasmus University Medical Centre, Room Na-2808, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.,Department of Orthoptics & Optometry, University of Applied Sciences, Utrecht, The Netherlands
| | - Milly S Tedja
- Department of Ophthalmology, Erasmus University Medical Centre, Room Na-2808, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - Hein Raat
- Department of Public Health, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - Adriana I Iglesias
- Department of Ophthalmology, Erasmus University Medical Centre, Room Na-2808, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus University Medical Centre, Rotterdam, The Netherlands.,Department of Clinical Genetics, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - Virginie J M Verhoeven
- Department of Ophthalmology, Erasmus University Medical Centre, Room Na-2808, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus University Medical Centre, Rotterdam, The Netherlands.,Department of Clinical Genetics, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - Caroline C W Klaver
- Department of Ophthalmology, Erasmus University Medical Centre, Room Na-2808, PO Box 2040, 3000 CA, Rotterdam, The Netherlands. .,Department of Epidemiology, Erasmus University Medical Centre, Rotterdam, The Netherlands. .,Department of Ophthalmology, Radboud University Medical Centre, Nijmegen, The Netherlands.
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25
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Dahlqwist E, Magnusson PKE, Pawitan Y, Sjölander A. On the relationship between the heritability and the attributable fraction. Hum Genet 2019; 138:425-435. [PMID: 30941497 PMCID: PMC6483966 DOI: 10.1007/s00439-019-02006-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 03/22/2019] [Indexed: 11/20/2022]
Abstract
Heritability is the most commonly used measure of genetic contribution to disease outcomes. Being the fraction of the variance of latent trait liability attributable to genetic factors, heritability of binary traits is a difficult technical concept that is sometimes misinterpreted as the more-easily understandable concept of attributable fraction. In this paper we use the liability threshold model to describe the analytical relationship between heritability and attributable fraction. Towards this end, we consider a hypothetical intervention that is aimed to reduce the genetic risk of the disease for a specified target group of the population. We show how the relation between the heritability and the attributable fraction depends on the disease prevalence, the intervention effect and the size of the target group. We use two real examples to illustrate the practical implications of our theoretical results.
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Affiliation(s)
| | | | - Yudi Pawitan
- Karolinska Institute, Nobels väg 12A, 171 77, Stockholm, Sweden
| | - Arvid Sjölander
- Karolinska Institute, Nobels väg 12A, 171 77, Stockholm, Sweden
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26
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Hantsoo L, Kornfield S, Anguera MC, Epperson CN. Inflammation: A Proposed Intermediary Between Maternal Stress and Offspring Neuropsychiatric Risk. Biol Psychiatry 2019; 85:97-106. [PMID: 30314641 PMCID: PMC6309506 DOI: 10.1016/j.biopsych.2018.08.018] [Citation(s) in RCA: 137] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 08/03/2018] [Accepted: 08/22/2018] [Indexed: 02/02/2023]
Abstract
During pregnancy, programming of the fetal central nervous system establishes vulnerabilities for emergence of neuropsychiatric phenotypes later in life. Psychosocial influences during pregnancy, such as stressful life events and chronic stress, correlate with offspring neuropsychiatric disorders and inflammation, respectively. Stress promotes inflammation, but the role of inflammation as a mediator between maternal psychosocial stress and offspring neuropsychiatric outcomes has not been extensively studied in humans. This review summarizes clinical evidence linking specific types of stress to maternal inflammatory load during pregnancy. We propose that inflammation is a mediator in the relationship between psychosocial stress and offspring neuropsychiatric outcomes, potentially influenced by poor maternal glucocorticoid-immune coordination. We present relevant experimental animal research supporting this hypothesis. We conclude that clinical and preclinical research supports the premise that stress-induced maternal immune activation contributes in part to prenatal programming of risk. Programming of risk is likely due to a combination of vulnerabilities, including multiple or repeated inflammatory events; timing of such events; poor maternal regulation of inflammation; genetic vulnerability; and lifestyle contributors.
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Affiliation(s)
- Liisa Hantsoo
- Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
| | - Sara Kornfield
- Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Montserrat C Anguera
- Department of Biomedical Sciences, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - C Neill Epperson
- Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania; Department of Obstetrics and Gynecology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania; Penn PROMOTES Research on Sex and Gender in Health, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
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27
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Esposito G, Azhari A, Borelli JL. Gene × Environment Interaction in Developmental Disorders: Where Do We Stand and What's Next? Front Psychol 2018; 9:2036. [PMID: 30416467 PMCID: PMC6212589 DOI: 10.3389/fpsyg.2018.02036] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 10/03/2018] [Indexed: 02/01/2023] Open
Abstract
Although the field of psychiatry has witnessed the proliferation of studies on Gene × Environment (G×E) interactions, still limited is the knowledge we possess of G×E interactions regarding developmental disorders. In this perspective paper, we discuss why G×E interaction studies are needed to broaden our knowledge of developmental disorders. We also discuss the different roles of hazardous versus self-generated environmental factors and how these types of factors may differentially engage with an individual's genetic background in predicting a resulting phenotype. Then, we present examplar studies that highlight the role of G×E in predicting atypical developmental trajectories as well as provide insight regarding treatment outcomes. Supported by these examples, we explore the need to move beyond merely examining statistical interactions between genes and the environment, and the motivation to investigate specific genetic susceptibility and environmental contexts that drive developmental disorders. We propose that further parsing of genetic and environmental components is required to fully understand the unique contribution of each factor to the etiology of developmental disorders. Finally, with a greater appreciation of the complexities of G×E interaction, this discussion will converge upon the potential implications for clinical and translational research.
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Affiliation(s)
- Gianluca Esposito
- Psychology Program, Nanyang Technological University, Singapore, Singapore
- Department of Psychology and Cognitive Science, University of Trento, Trento, Italy
| | - Atiqah Azhari
- Psychology Program, Nanyang Technological University, Singapore, Singapore
| | - Jessica L. Borelli
- Department of Psychological Science, University of California, Irvine, Irvine, CA, United States
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28
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Identifying the contribution of prenatal risk factors to offspring development and psychopathology: What designs to use and a critique of literature on maternal smoking and stress in pregnancy. Dev Psychopathol 2018; 30:1107-1128. [DOI: 10.1017/s0954579418000421] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
AbstractIdentifying prenatal environmental factors that have genuinely causal effects on psychopathology is an important research priority, but it is crucial to select an appropriate research design. In this review we explain why and what sorts of designs are preferable and focus on genetically informed/sensitive designs. In the field of developmental psychopathology, causal inferences about prenatal risks have not always been based on evidence generated from appropriate designs. We focus on reported links between maternal smoking during pregnancy and offspring attention-deficit/hyperactivity disorder or conduct problems. Undertaking a systematic review of findings from genetically informed designs and “triangulating” evidence from studies with different patterns of bias, we conclude that at present findings suggest it is unlikely that there is a substantial causal effect of maternal smoking in pregnancy on either attention-deficit/hyperactivity disorder or conduct problems. In contrast, for offspring birth weight (which serves as a positive control) findings strongly support a negative causal effect of maternal smoking in pregnancy. For maternal pregnancy stress, too few studies use genetically sensitive designs to draw firm conclusions, but continuity with postnatal stress seems important. We highlight the importance of moving beyond observational designs, for systematic evaluation of the breadth of available evidence and choosing innovative designs. We conclude that a broader set of prenatal risk factors should be examined, including those relevant in low- and middle-income contexts. Future directions include a greater use of molecular genetically informed designs such as Mendelian randomization to test causal hypotheses about prenatal exposure and offspring outcome.
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29
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Leighton C, Botto A, Silva JR, Jiménez JP, Luyten P. Vulnerability or Sensitivity to the Environment? Methodological Issues, Trends, and Recommendations in Gene-Environment Interactions Research in Human Behavior. Front Psychiatry 2017; 8:106. [PMID: 28674505 PMCID: PMC5475387 DOI: 10.3389/fpsyt.2017.00106] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 05/31/2017] [Indexed: 12/29/2022] Open
Abstract
Research on the potential role of gene-environment interactions (GxE) in explaining vulnerability to psychopathology in humans has witnessed a shift from a diathesis-stress perspective to differential susceptibility approaches. This paper critically reviews methodological issues and trends in this body of research. Databases were screened for studies of GxE in the prediction of personality traits, behavior, and mental health disorders in humans published between January 2002 and January 2015. In total, 315 papers were included. Results showed that 34 candidate genes have been included in GxE studies. Independent of the type of environment studied (early or recent life events, positive or negative environments), about 67-83% of studies have reported significant GxE interactions, which is consistent with a social susceptibility model. The percentage of positive results does not seem to differ depending on the gene studied, although publication bias might be involved. However, the number of positive findings differs depending on the population studied (i.e., young adults vs. older adults). Methodological considerations limit the ability to draw strong conclusions, particularly as almost 90% (n = 283/315) of published papers are based on samples from North America and Europe, and about 70% of published studies (219/315) are based on samples that were also used in other reports. At the same time, there are clear indications of methodological improvements over time, as is shown by a significant increase in longitudinal and experimental studies as well as in improved minimum genotyping. Recommendations for future research, such as minimum quality assessment of genes and environmental factors, specifying theoretical models guiding the study, and taking into account of cultural, ethnic, and lifetime perspectives, are formulated.
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Affiliation(s)
- Caroline Leighton
- Departamento de Psiquiatria y Salud Mental Oriente, Universidad de Chile, Santiago, Chile.,Millennium Institute for Research in Depression and Personality - MIDAP, Ministry of Economy, Santiago, Chile
| | - Alberto Botto
- Departamento de Psiquiatria y Salud Mental Oriente, Universidad de Chile, Santiago, Chile.,Millennium Institute for Research in Depression and Personality - MIDAP, Ministry of Economy, Santiago, Chile
| | - Jaime R Silva
- Millennium Institute for Research in Depression and Personality - MIDAP, Ministry of Economy, Santiago, Chile.,Centro de Apego y Regulación Emocional (CARE), Facultad de Psicología, Universidad del Desarrollo, Santiago, Chile.,Clinica Alemana de Santiago, Santiago, Chile
| | - Juan Pablo Jiménez
- Departamento de Psiquiatria y Salud Mental Oriente, Universidad de Chile, Santiago, Chile.,Millennium Institute for Research in Depression and Personality - MIDAP, Ministry of Economy, Santiago, Chile
| | - Patrick Luyten
- Millennium Institute for Research in Depression and Personality - MIDAP, Ministry of Economy, Santiago, Chile.,Clinical Psychology, University of Leuven, Leuven, Belgium.,Research Department of Clinical, Educational and Health Psychology, University College London, London, United Kingdom
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30
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Genetic Regulation of Maternal Oxytocin Response and Its Influences on Maternal Behavior. Neural Plast 2016; 2016:5740365. [PMID: 27872764 PMCID: PMC5107871 DOI: 10.1155/2016/5740365] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 09/08/2016] [Accepted: 10/09/2016] [Indexed: 11/18/2022] Open
Abstract
We interrogated the genetic modulation of maternal oxytocin response and its association with maternal behavior using genetic risk scores within the oxytocin receptor (OXTR) gene. We identified a novel SNP, rs968389, to be significantly associated with maternal oxytocin response after a challenging mother-infant interaction task (Still Face Paradigm) and maternal separation anxiety from the infant. Performing a multiallelic analysis across OXTR by calculating a cumulative genetic risk score revealed a significant gene-by-environment (G × E) interaction, with OXTR genetic risk score interacting with adult separation anxiety to modulate levels of maternal sensitivity. Mothers with higher OXTR genetic risk score and adult separation anxiety showed significantly reduced levels of maternal sensitivity during free play with the infant. The same G × E interaction was also observed for the extended OXTR cumulative genetic risk score that included rs968389. Moreover, the extended cumulative OXTR genetic risk score itself was found to be significantly associated with maternal separation anxiety as it specifically relates to the infant. Our results suggest a complex montage of individual and synergistic genetic mediators of maternal behavior. These findings add to specific knowledge about genetic regulation of maternal oxytocin response in relation to maternal adjustment and infant bonding through the first few months of life.
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31
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Samek DR, Wilson S, McGue M, Iacono WG. Genetic and Environmental Influences on Parent-Child Conflict and Child Depression Through Late Adolescence. JOURNAL OF CLINICAL CHILD AND ADOLESCENT PSYCHOLOGY 2016; 47:S5-S20. [PMID: 27043719 DOI: 10.1080/15374416.2016.1141357] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Few studies have investigated potential gender differences in the genetic and environmental influences on the prospective associations between parent-child conflict and later depression, a notable gap given substantial gender differences in rates of depression and suggestive evidence of differences in the etiology of depression among females and males. To fill this gap, we evaluated whether the prospective relationship between parent-child conflict and major depressive disorder symptoms varied as a function of parent-child gender composition. A combined twin and adoption sample was used (53% female; 85% European ancestry), containing 1,627 adolescent sibling pairs (789 monozygotic twin pairs, 594 dizygotic/full-biological pairs, 244 genetically unrelated pairs) with assessments at two time points in adolescence (approximate ages 15 and 18). Prospective associations between parent-child conflict and subsequent adolescent depression were explained predominately through common genetic influences for mother-daughter and mother-son pairs but less so for father-daughter and father-son pairs. Results support the notion that processes of gene-environment correlation involved in the prospective associations between parent-child conflict, and later adolescent depression appear to be less relevant to father-child relationships in comparison to mother-child relationships. Notably, results did not show that parent-child conflict was more relevant to the etiology of major depressive disorder (MDD) for girls than boys; gender differences in depression do not appear to be due to differences in the associations between parent-child conflict and child depression.
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Affiliation(s)
- Diana R Samek
- a Department of Human Development and Family Studies , Auburn University
| | - Sylia Wilson
- b Department of Psychology , University of Minnesota
| | - Matt McGue
- b Department of Psychology , University of Minnesota
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32
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Edwards AC, Maes HH, Prescott CA, Kendler KS. Multiple mechanisms influencing the relationship between alcohol consumption and peer alcohol use. Alcohol Clin Exp Res 2015; 39:324-32. [PMID: 25597346 DOI: 10.1111/acer.12624] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 11/03/2014] [Indexed: 11/30/2022]
Abstract
BACKGROUND Alcohol consumption is typically correlated with the alcohol use behaviors of one's peers. Previous research has suggested that this positive relationship could be due to social selection, social influence, or a combination of both processes. However, few studies have considered the role of shared genetic and environmental influences in conjunction with causal processes. METHODS This study uses data from a sample of male twins (N = 1,790) who provided retrospective reports of their own alcohol consumption and their peers' alcohol-related behaviors, from adolescence into young adulthood (ages 12 to 25). Structural equation modeling was employed to compare 3 plausible models of genetic and environmental influences on the relationship between phenotypes over time. RESULTS Model fitting indicated that one's own alcohol consumption and the alcohol use of one's peers are related through both genetic and shared environmental factors and through unique environmental causal influences. The relative magnitude of these factors, and their contribution to covariation, changed over time, with genetic factors becoming more meaningful later in development. CONCLUSIONS Peers' alcohol use behaviors and one's own alcohol consumption are related through a complex combination of genetic and environmental factors that act via correlated factors and the complementary causal mechanisms of social selection and influence. Understanding these processes can inform risk assessment as well as improve our ability to model the development of alcohol use.
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Affiliation(s)
- Alexis C Edwards
- Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, Virginia; Department of Psychiatry, Virginia Commonwealth University, Richmond, Virginia
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33
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Bornovalova MA, Cummings JR, Hunt E, Blazei R, Malone S, Iacono WG. Understanding the relative contributions of direct environmental effects and passive genotype-environment correlations in the association between familial risk factors and child disruptive behavior disorders. Psychol Med 2014; 44:831-844. [PMID: 23714724 PMCID: PMC3883935 DOI: 10.1017/s0033291713001086] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Previous work reports an association between familial risk factors stemming from parental characteristics and offspring disruptive behavior disorders (DBDs). This association may reflect (a) the direct effects of familial environment and (b) a passive gene-environment correlation (r(GE)), wherein the parents provide both the genes and the environment. The current study examined the contributions of direct environmental influences and passive r(GE) by comparing the effects of familial risk factors on child DBDs in genetically related (biological) and non-related (adoptive) families. METHOD Participants were 402 adoptive and 204 biological families. Familial environment was defined as maternal and paternal maladaptive parenting and antisociality, marital conflict and divorce; offspring DBDs included attention deficit hyperactivity disorder (ADHD), conduct disorder (CD) and oppositional defiant disorder (ODD). Mixed-level regressions estimated the main effects of familial environment, adoption status and the familial environment by adoption status interaction term, which tested for the presence of passive r(GE). RESULTS There was a main effect of maternal and paternal maladaptive parenting and marital discord on child DBDs, indicating a direct environmental effect. There was no direct environmental effect of maternal or paternal antisociality, but maternal and paternal antisociality had stronger associations with child DBDs in biological families than adoptive families, indicating the presence of a passive r(GE). CONCLUSIONS Many familial risk factors affected children equally across genetically related and non-related families, providing evidence for direct environmental effects. The relationship of parental antisociality and offspring DBDs was best explained by a passive r(GE), where a general vulnerability toward externalizing psychopathology is passed down by the parents to the children.
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Affiliation(s)
| | | | | | - Ryan Blazei
- Department of Psychology, University of Minnesota
| | - Steve Malone
- Department of Psychology, University of Minnesota
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Examining the role of passive gene–environment correlation in childhood depression using a novel genetically sensitive design. Dev Psychopathol 2013; 25:37-50. [DOI: 10.1017/s0954579412000880] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
AbstractParental depression is associated with disruptions in the parent–child relationship, exposure to stressful family life events, and offspring depressive symptoms. Evidence suggests that intergenerational transmission of depression involves environmental and inherited contributions. We sought to evaluate the role of passive gene–environment correlation (rGE) in relation to depression, family life events that were due to parental behavior, and parental positivity in a sample where children varied in genetic relatedness to their rearing parents. Our study included 865 families with children born through assisted conception (444 related to both parents, 210 related to the mother only, 175 related to the father only, and 36 related to neither parent). Consistent with previous studies, the intergenerational transmission of depressive symptoms was largely due to environmental factors, although parent and child gender influenced results. Maternal and paternal depressive symptoms were associated with reduced positivity and increased parentally imposed life events regardless of parent–child relatedness. Results of path analysis were consistent with passive rGE for both maternal and paternal positivity in that positivity partially mediated the link between maternal/paternal depression and child depression only in genetically related parent–child pairs. Results also suggested passive rGE involving parentally imposed life events for mothers and fathers although passive rGE effects were smaller than for positivity.
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