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Handegård KW, Storengen LM, Joergensen D, Lingaas F. Genomic analysis of firework fear and noise reactivity in standard poodles. Canine Med Genet 2023; 10:2. [PMID: 36890545 PMCID: PMC9996964 DOI: 10.1186/s40575-023-00125-0] [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: 10/10/2022] [Accepted: 03/01/2023] [Indexed: 03/10/2023] Open
Abstract
BACKGROUND Fear of firework noises and other loud, sudden noises (noise reactivity) is a significant problem for many dogs and may have a negative effect on both welfare and, in severe cases, the life expectancy of dogs. A wide range of behavior traits, including fear-related behaviors, have high heritability estimates in dogs. The aim of this study was to estimate genomic heritability for fear of fireworks and loud noises in dogs. RESULTS A genomic heritability estimate was performed based on genome-wide SNPs from standard poodles with records of fear of fireworks and noise reactivity. The study was based on questionnaires answered by owners, who also volunteered to return a cheek swab from their dog for DNA analyses. SNP-based heritability was estimated to be 0.28 for firework fear and 0.16 for noise reactivity. We also identified an interesting region on chromosome 17 that was weakly associated with both traits. CONCLUSIONS We have estimated low to medium genomic heritabilities for fear of fireworks and noise reactivity in standard poodles. We have also identified an interesting region on chromosome 17, which harbors genes that have been shown to be involved in different psychiatric traits with anxiety components in humans. The region was associated with both traits; however, the association was weak and need further verification from other studies.
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Affiliation(s)
- Karin Westereng Handegård
- Department of Preclinical Sciences and Pathology, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P.O. Box 5003, 1432, Ås, Norway.
| | - Linn Mari Storengen
- Department of Preclinical Sciences and Pathology, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P.O. Box 5003, 1432, Ås, Norway
| | - Dina Joergensen
- Department of Preclinical Sciences and Pathology, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P.O. Box 5003, 1432, Ås, Norway
| | - Frode Lingaas
- Department of Preclinical Sciences and Pathology, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P.O. Box 5003, 1432, Ås, Norway
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Elsaesser M, Herpertz S, Piosczyk H, Jenkner C, Hautzinger M, Schramm E. Modular-based psychotherapy (MoBa) versus cognitive-behavioural therapy (CBT) for patients with depression, comorbidities and a history of childhood maltreatment: study protocol for a randomised controlled feasibility trial. BMJ Open 2022; 12:e057672. [PMID: 35820739 PMCID: PMC9277372 DOI: 10.1136/bmjopen-2021-057672] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
INTRODUCTION In depression treatment, most patients do not reach response or remission with current psychotherapeutic approaches. Major reasons for individual non-response are interindividual heterogeneity of etiological mechanisms and pathological forms, and a high rate of comorbid disorders. Personalised treatments targeting comorbidities as well as underlying transdiagnostic mechanisms and factors like early childhood maltreatment may lead to better outcomes. A modular-based psychotherapy (MoBa) approach provides a treatment model of independent and flexible therapy elements within a systematic treatment algorithm to combine and integrate existing evidence-based approaches. By optimally tailoring module selection and application to the specific needs of each patient, MoBa has great potential to improve the currently unsatisfying results of psychotherapy as a bridge between disorder-specific and personalised approaches. METHODS AND ANALYSIS In a randomised controlled feasibility trial, N=70 outpatients with episodic or persistent major depression, comorbidity and childhood maltreatment are treated in 20 individual sessions with MoBa or standard cognitive-behavioural therapy for depression. The three modules of MoBa focus on deficits associated with early childhood maltreatment: the systems of negative valence, social processes and arousal. According to a specific questionnaire-based treatment algorithm, elements from cognitive behavioural analysis system of psychotherapy, mentalisation-based psychotherapy and/or mindfulness-based cognitive therapy are integrated for a personalised modular procedure.As a proof of concept, this trial will provide evidence for the feasibility and efficacy (post-treatment and 6-month follow-up) of a modular add-on approach for patients with depression, comorbidities and a history of childhood maltreatment. Crucial feasibility aspects include targeted psychopathological mechanisms, selection (treatment algorithm), sequence and application of modules, as well as training and supervision of the study therapists. ETHICS AND DISSEMINATION This study obtained approval from the independent Ethics Committees of the University of Freiburg and the University of Heidelberg. All findings will be disseminated broadly via peer-reviewed articles in scientific journals and contributions to national and international conferences. TRIAL REGISTRATION NUMBER DRKS00022093.
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Affiliation(s)
- Moritz Elsaesser
- Department of Psychiatry and Psychotherapy, Medical Center and Faculty of Medicine, University of Freiburg, Freiburg im Breisgau, Germany
| | - Sabine Herpertz
- Department of General Psychiatry, Heidelberg University, Heidelberg, Germany
| | - Hannah Piosczyk
- Department of Psychiatry and Psychotherapy, Medical Center and Faculty of Medicine, University of Freiburg, Freiburg im Breisgau, Germany
| | - Carolin Jenkner
- Clinical Trials Unit, Universitatsklinikum Freiburg, Freiburg, Germany
| | - Martin Hautzinger
- Department of Psychology, Clinical Psychology, and Psychotherapy, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Elisabeth Schramm
- Department of Psychiatry and Psychotherapy, Medical Center and Faculty of Medicine, University of Freiburg, Freiburg im Breisgau, Germany
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3
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Wang Y, Herzig G, Molano C, Liu A. Differential expression of the Tmem132 family genes in the developing mouse nervous system. Gene Expr Patterns 2022; 45:119257. [PMID: 35690356 DOI: 10.1016/j.gep.2022.119257] [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: 04/28/2022] [Revised: 06/01/2022] [Accepted: 06/03/2022] [Indexed: 11/15/2022]
Abstract
The family of novel transmembrane proteins (TMEM) 132 have been associated with multiple neurological disorders and cancers in humans, but have hardly been studied in vivo. Here we report the expression patterns of the five Tmem132 genes (a, b, c, d and e) in developing mouse nervous system with RNA in situ hybridization in wholemount embryos and tissue sections. Our results reveal differential and partially overlapping expression of multiple Tmem132 family members in both the central and peripheral nervous system, suggesting potential partial redundancy among them.
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Affiliation(s)
- Yuan Wang
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, PR China; Department of Biology, Eberly College of Science and Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, USA
| | - Graham Herzig
- Department of Biology, Eberly College of Science and Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, USA
| | - Cassandra Molano
- Department of Biology, Eberly College of Science and Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, USA
| | - Aimin Liu
- Department of Biology, Eberly College of Science and Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, USA.
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4
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Sarviaho R, Hakosalo O, Tiira K, Sulkama S, Niskanen JE, Hytönen MK, Sillanpää MJ, Lohi H. A novel genomic region on chromosome 11 associated with fearfulness in dogs. Transl Psychiatry 2020; 10:169. [PMID: 32467585 PMCID: PMC7256038 DOI: 10.1038/s41398-020-0849-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 05/05/2020] [Accepted: 05/14/2020] [Indexed: 02/07/2023] Open
Abstract
The complex phenotypic and genetic nature of anxieties hampers progress in unravelling their molecular etiologies. Dogs present extensive natural variation in fear and anxiety behaviour and could advance the understanding of the molecular background of behaviour due to their unique breeding history and genetic architecture. As dogs live as part of human families under constant care and monitoring, information from their behaviour and experiences are easily available. Here we have studied the genetic background of fearfulness in the Great Dane breed. Dogs were scored and categorised into cases and controls based on the results of the validated owner-completed behavioural survey. A genome-wide association study in a cohort of 124 dogs with and without socialisation as a covariate revealed a genome-wide significant locus on chromosome 11. Whole exome sequencing and whole genome sequencing revealed extensive regions of opposite homozygosity in the same locus on chromosome 11 between the cases and controls with interesting neuronal candidate genes such as MAPK9/JNK2, a known hippocampal regulator of anxiety. Further characterisation of the identified locus will pave the way for molecular understanding of fear in dogs and may provide a natural animal model for human anxieties.
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Affiliation(s)
- R. Sarviaho
- grid.7737.40000 0004 0410 2071Department of Veterinary Biosciences, University of Helsinki, 00014 Helsinki, Finland ,grid.7737.40000 0004 0410 2071Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland ,grid.428673.c0000 0004 0409 6302Folkhälsan Research Center, 00290 Helsinki, Finland
| | - O. Hakosalo
- grid.7737.40000 0004 0410 2071Department of Veterinary Biosciences, University of Helsinki, 00014 Helsinki, Finland ,grid.7737.40000 0004 0410 2071Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland ,grid.428673.c0000 0004 0409 6302Folkhälsan Research Center, 00290 Helsinki, Finland
| | - K. Tiira
- grid.7737.40000 0004 0410 2071Department of Veterinary Biosciences, University of Helsinki, 00014 Helsinki, Finland ,grid.7737.40000 0004 0410 2071Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland ,grid.428673.c0000 0004 0409 6302Folkhälsan Research Center, 00290 Helsinki, Finland ,grid.7737.40000 0004 0410 2071Equine and Small Animal Medicine, University of Helsinki, Helsinki, Finland
| | - S. Sulkama
- grid.7737.40000 0004 0410 2071Department of Veterinary Biosciences, University of Helsinki, 00014 Helsinki, Finland ,grid.7737.40000 0004 0410 2071Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland ,grid.428673.c0000 0004 0409 6302Folkhälsan Research Center, 00290 Helsinki, Finland
| | - J. E. Niskanen
- grid.7737.40000 0004 0410 2071Department of Veterinary Biosciences, University of Helsinki, 00014 Helsinki, Finland ,grid.7737.40000 0004 0410 2071Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland ,grid.428673.c0000 0004 0409 6302Folkhälsan Research Center, 00290 Helsinki, Finland
| | - M. K. Hytönen
- grid.7737.40000 0004 0410 2071Department of Veterinary Biosciences, University of Helsinki, 00014 Helsinki, Finland ,grid.7737.40000 0004 0410 2071Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland ,grid.428673.c0000 0004 0409 6302Folkhälsan Research Center, 00290 Helsinki, Finland
| | - M. J. Sillanpää
- grid.10858.340000 0001 0941 4873Department of Mathematical Sciences, Biocenter Oulu and Infotech Oulu, University of Oulu, Oulu, Finland
| | - H. Lohi
- grid.7737.40000 0004 0410 2071Department of Veterinary Biosciences, University of Helsinki, 00014 Helsinki, Finland ,grid.7737.40000 0004 0410 2071Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland ,grid.428673.c0000 0004 0409 6302Folkhälsan Research Center, 00290 Helsinki, Finland
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Bas-Hoogendam JM, van Steenbergen H, van der Wee NJA, Westenberg PM. Amygdala hyperreactivity to faces conditioned with a social-evaluative meaning- a multiplex, multigenerational fMRI study on social anxiety endophenotypes. NEUROIMAGE-CLINICAL 2020; 26:102247. [PMID: 32247196 PMCID: PMC7125356 DOI: 10.1016/j.nicl.2020.102247] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 03/12/2020] [Accepted: 03/14/2020] [Indexed: 12/31/2022]
Abstract
Social anxiety disorder (SAD) runs in families, but the neurobiological pathways underlying the genetic susceptibility towards SAD are largely unknown. Here, we employed an endophenotype approach, and tested the hypothesis that amygdala hyperreactivity to faces conditioned with a social-evaluative meaning is a candidate SAD endophenotype. We used data from the multiplex, multigenerational Leiden Family Lab study on Social Anxiety Disorder (eight families, n = 105) and investigated amygdala activation during a social-evaluative conditioning paradigm with high ecological validity in the context of SAD. Three neutral faces were repeatedly presented in combination with socially negative, positive or neutral sentences. We focused on two endophenotype criteria: co-segregation of the candidate endophenotype with the disorder within families, and heritability. Analyses of the fMRI data were restricted to the amygdala as a region of interest, and association analyses revealed that bilateral amygdala hyperreactivity in response to the conditioned faces co-segregated with social anxiety (SA; continuous measure) within the families; we found, however, no relationship between SA and brain activation in response to more specific fMRI contrasts. Furthermore, brain activation in a small subset of voxels within these amygdala clusters was at least moderately heritable. Taken together, these findings show that amygdala engagement in response to conditioned faces with a social-evaluative meaning qualifies as a neurobiological candidate endophenotype of social anxiety. Thereby, these data shed light on the genetic vulnerability to develop SAD.
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Affiliation(s)
- Janna Marie Bas-Hoogendam
- Institute of Psychology, Leiden University, Wassenaarseweg 52, 2333 AK Leiden, The Netherlands; Department of Psychiatry, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands; Leiden Institute for Brain and Cognition, Leiden, The Netherlands.
| | - Henk van Steenbergen
- Institute of Psychology, Leiden University, Wassenaarseweg 52, 2333 AK Leiden, The Netherlands; Leiden Institute for Brain and Cognition, Leiden, The Netherlands.
| | - Nic J A van der Wee
- Department of Psychiatry, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands; Leiden Institute for Brain and Cognition, Leiden, The Netherlands.
| | - P Michiel Westenberg
- Institute of Psychology, Leiden University, Wassenaarseweg 52, 2333 AK Leiden, The Netherlands; Leiden Institute for Brain and Cognition, Leiden, The Netherlands.
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Bhattacharya S, Fontaine A, MacCallum PE, Drover J, Blundell J. Stress Across Generations: DNA Methylation as a Potential Mechanism Underlying Intergenerational Effects of Stress in Both Post-traumatic Stress Disorder and Pre-clinical Predator Stress Rodent Models. Front Behav Neurosci 2019; 13:113. [PMID: 31191267 PMCID: PMC6547031 DOI: 10.3389/fnbeh.2019.00113] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 05/07/2019] [Indexed: 12/12/2022] Open
Abstract
Although most humans will experience some type of traumatic event in their lifetime only a small set of individuals will go on to develop post-traumatic stress disorder (PTSD). Differences in sex, age, trauma type, and comorbidity, along with many other elements, contribute to the heterogenous manifestation of this disorder. Nonetheless, aberrant hypothalamus-pituitary-adrenal (HPA) axis activity, especially in terms of cortisol and glucocorticoid receptor (GR) alterations, has been postulated as a tenable factor in the etiology and pathophysiology of PTSD. Moreover, emerging data suggests that the harmful effects of traumatic stress to the HPA axis in PTSD can also propagate into future generations, making offspring more prone to psychopathologies. Predator stress models provide an ethical and ethologically relevant way to investigate tentative mechanisms that are thought to underlie this phenomenon. In this review article, we discuss findings from human and laboratory predator stress studies that suggest changes to DNA methylation germane to GRs may underlie the generational effects of trauma transmission. Understanding mechanisms that promote stress-induced psychopathology will represent a major advance in the field and may lead to novel treatments for such devastating, and often treatment-resistant trauma and stress-disorders.
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Affiliation(s)
- Sriya Bhattacharya
- Department of Psychology, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Audrey Fontaine
- Department of Psychology, Memorial University of Newfoundland, St. John's, NL, Canada.,Institut des Systèmes Intelligents et de Robotique (ISIR), Université Pierre et Marie Curie, Sorbonne Universités, Paris, France
| | - Phillip E MacCallum
- Department of Psychology, Memorial University of Newfoundland, St. John's, NL, Canada
| | - James Drover
- Department of Psychology, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Jacqueline Blundell
- Department of Psychology, Memorial University of Newfoundland, St. John's, NL, Canada
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7
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Two novel genomic regions associated with fearfulness in dogs overlap human neuropsychiatric loci. Transl Psychiatry 2019; 9:18. [PMID: 30655508 PMCID: PMC6336819 DOI: 10.1038/s41398-018-0361-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 12/10/2018] [Indexed: 12/17/2022] Open
Abstract
Anxiety disorders are among the leading health issues in human medicine. The complex phenotypic and allelic nature of these traits as well as the challenge of establishing reliable measures of the heritable component of behaviour from the associated environmental factors hampers progress in their molecular aetiology. Dogs exhibit large natural variation in fearful and anxious behaviour and could facilitate progress in the molecular aetiology due to their unique genetic architecture. We have performed a genome-wide association study with a canine high-density SNP array in a cohort of 330 German Shepherds for two phenotypes, fear of loud noises (noise sensitivity) and fear of strangers or in novel situations. Genome-widely significant loci were discovered for the traits on chromosomes 20 and 7, respectively. The regions overlap human neuropsychiatric loci, including 18p11.2, with physiologically relevant candidate genes that contribute to glutamatergic and dopaminergic neurotransmission in the brain. In addition, the noise-sensitivity locus includes hearing-related candidate genes. These results indicate a genetic contribution for canine fear and suggest a shared molecular aetiology of anxiety across species. Further characterisation of the identified loci will pave the way to molecular understanding of the conditions as a prerequisite for improved therapy.
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8
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Ersig AL, Schutte DL, Standley J, Leslie E, Zimmerman B, Kleiber C, Hanrahan K, Murray JC, McCarthy AM. Relationship of Genetic Variants With Procedural Pain, Anxiety, and Distress in Children. Biol Res Nurs 2017; 19:339-349. [PMID: 28413930 DOI: 10.1177/1099800417692878] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE This study used a candidate gene approach to examine genomic variation associated with pain, anxiety, and distress in children undergoing a medical procedure. STUDY DESIGN Children aged 4-10 years having an IV catheter insertion were recruited from three Midwestern children's hospitals. Self-report measures of pain, anxiety, and distress were obtained as well as an observed measure of distress. Samples were collected from children and biological parents for analysis of genomic variation. Genotyped variants had known or suspected association with phenotypes of interest. Analyses included child-only association and family-based transmission disequilibrium tests. RESULTS Genotype and phenotype data were available from 828 children and 376 family trios. Children were 50% male, had a mean age of 7.2 years, and were 84% White/non-Hispanic. In family-based analysis, one single-nucleotide polymorphism (SNP; rs1143629, interleukin ( IL1B) 1β) was associated with observed child distress at Bonferroni-corrected levels of significance ( p = .00013), while two approached significance for association with high state anxiety (rs6330 Nerve Growth Factor, Beta Subunit, [ NGFB]) and high trait anxiety (rs6265 brain-derived neurotrophic factor [ BDNF]). In the child-only analysis, multiple SNPs showed nominal evidence of relationships with phenotypes of interest. rs6265 BDNF and rs2941026 cholecystokinin B receptor had possible relationships with trait anxiety in child-only and family-based analyses. CONCLUSIONS Exploring genomic variation furthers our understanding of pain, anxiety, and distress and facilitates genomic screening to identify children at high risk of procedural pain, anxiety, and distress. Combined with clinical observations and knowledge, such explorations could help guide tailoring of interventions to limit procedure-related distress and identify genes and pathways of interest for future genotype-phenotype studies.
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Affiliation(s)
- Anne L Ersig
- 1 College of Nursing, The University of Iowa, Iowa City, IA, USA
| | - Debra L Schutte
- 2 College of Nursing, Wayne State University, Detroit, MI, USA
| | | | - Elizabeth Leslie
- 4 School of Dental Medicine, The University of Pittsburgh, Pittsburgh, PA, USA
| | - Bridget Zimmerman
- 5 College of Public Health, The University of Iowa, Iowa City, IA, USA
| | | | - Kirsten Hanrahan
- 6 The University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Jeffrey C Murray
- 3 College of Medicine, The University of Iowa, Iowa City, IA, USA
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Savage JE, Sawyers C, Roberson-Nay R, Hettema JM. The genetics of anxiety-related negative valence system traits. Am J Med Genet B Neuropsychiatr Genet 2017; 174:156-177. [PMID: 27196537 PMCID: PMC5349709 DOI: 10.1002/ajmg.b.32459] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 05/05/2016] [Indexed: 01/11/2023]
Abstract
NIMH's Research Domain Criteria (RDoC) domain of negative valence systems (NVS) captures constructs of negative affect such as fear and distress traditionally subsumed under the various internalizing disorders. Through its aims to capture dimensional measures that cut across diagnostic categories and are linked to underlying neurobiological systems, a large number of phenotypic constructs have been proposed as potential research targets. Since "genes" represent a central "unit of analysis" in the RDoC matrix, it is important for studies going forward to apply what is known about the genetics of these phenotypes as well as fill in the gaps of existing knowledge. This article reviews the extant genetic epidemiological data (twin studies, heritability) and molecular genetic association findings for a broad range of putative NVS phenotypic measures. We find that scant genetic epidemiological data is available for experimentally derived measures such as attentional bias, peripheral physiology, or brain-based measures of threat response. The molecular genetic basis of NVS phenotypes is in its infancy, since most studies have focused on a small number of candidate genes selected for putative association to anxiety disorders (ADs). Thus, more research is required to provide a firm understanding of the genetic aspects of anxiety-related NVS constructs. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Jeanne E. Savage
- Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA
| | - Chelsea Sawyers
- Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA
| | - Roxann Roberson-Nay
- Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA,Department of Psychiatry, Virginia Commonwealth University, Richmond, VA
| | - John M. Hettema
- Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, VA,Department of Psychiatry, Virginia Commonwealth University, Richmond, VA
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Ashbrook DG, Williams RW, Lu L, Hager R. A cross-species genetic analysis identifies candidate genes for mouse anxiety and human bipolar disorder. Front Behav Neurosci 2015; 9:171. [PMID: 26190982 PMCID: PMC4486840 DOI: 10.3389/fnbeh.2015.00171] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 06/18/2015] [Indexed: 12/21/2022] Open
Abstract
Bipolar disorder (BD) is a significant neuropsychiatric disorder with a lifetime prevalence of ~1%. To identify genetic variants underlying BD genome-wide association studies (GWAS) have been carried out. While many variants of small effect associated with BD have been identified few have yet been confirmed, partly because of the low power of GWAS due to multiple comparisons being made. Complementary mapping studies using murine models have identified genetic variants for behavioral traits linked to BD, often with high power, but these identified regions often contain too many genes for clear identification of candidate genes. In the current study we have aligned human BD GWAS results and mouse linkage studies to help define and evaluate candidate genes linked to BD, seeking to use the power of the mouse mapping with the precision of GWAS. We use quantitative trait mapping for open field test and elevated zero maze data in the largest mammalian model system, the BXD recombinant inbred mouse population, to identify genomic regions associated with these BD-like phenotypes. We then investigate these regions in whole genome data from the Psychiatric Genomics Consortium's bipolar disorder GWAS to identify candidate genes associated with BD. Finally we establish the biological relevance and pathways of these genes in a comprehensive systems genetics analysis. We identify four genes associated with both mouse anxiety and human BD. While TNR is a novel candidate for BD, we can confirm previously suggested associations with CMYA5, MCTP1, and RXRG. A cross-species, systems genetics analysis shows that MCTP1, RXRG, and TNR coexpress with genes linked to psychiatric disorders and identify the striatum as a potential site of action. CMYA5, MCTP1, RXRG, and TNR are associated with mouse anxiety and human BD. We hypothesize that MCTP1, RXRG, and TNR influence intercellular signaling in the striatum.
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Affiliation(s)
- David G Ashbrook
- Computational and Evolutionary Biology, Faculty of Life Sciences, University of Manchester Manchester, UK
| | - Robert W Williams
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, University of Tennessee Memphis, TN, USA
| | - Lu Lu
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, University of Tennessee Memphis, TN, USA ; Jiangsu Key Laboratory of Neuroregeneration, Nantong University Nantong, China
| | - Reinmar Hager
- Computational and Evolutionary Biology, Faculty of Life Sciences, University of Manchester Manchester, UK
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Strike LT, Couvy-Duchesne B, Hansell NK, Cuellar-Partida G, Medland SE, Wright MJ. Genetics and Brain Morphology. Neuropsychol Rev 2015; 25:63-96. [DOI: 10.1007/s11065-015-9281-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 02/08/2015] [Indexed: 12/17/2022]
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12
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The role of rapid eye movement sleep for amygdala-related memory processing. Neurobiol Learn Mem 2015; 122:110-21. [PMID: 25638277 DOI: 10.1016/j.nlm.2015.01.008] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 12/19/2014] [Accepted: 01/19/2015] [Indexed: 01/01/2023]
Abstract
Over the years, rapid eye movement (REM) sleep has been associated with general memory consolidation, specific consolidation of perceptual, procedural, emotional and fear memories, brain maturation and preparation of waking consciousness. More recently, some of these associations (e.g., general and procedural memory consolidation) have been shown to be unlikely, while others (e.g., brain maturation and consciousness) remain inconclusive. In this review, we argue that both behavioral and neurophysiological evidence supports a role of REM sleep for amygdala-related memory processing: the amygdala-hippocampus-medial prefrontal cortex network involved in emotional processing, fear memory and valence consolidation shows strongest activity during REM sleep, in contrast to the hippocampus-medial prefrontal cortex only network which is more active during non-REM sleep. However, more research is needed to fully understand the mechanisms.
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13
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Scott KA, Hoban AE, Clarke G, Moloney GM, Dinan TG, Cryan JF. Thinking small: towards microRNA-based therapeutics for anxiety disorders. Expert Opin Investig Drugs 2015; 24:529-42. [DOI: 10.1517/13543784.2014.997873] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Karen A Scott
- 1Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
- 2Alimentary Pharmabiotic Centre, University College Cork, Cork, Ireland
| | - Alan E Hoban
- 1Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
- 2Alimentary Pharmabiotic Centre, University College Cork, Cork, Ireland
| | - Gerard Clarke
- 2Alimentary Pharmabiotic Centre, University College Cork, Cork, Ireland
- 3Department of Psychiatry, University College Cork, Cork, Ireland
| | - Gerard M Moloney
- 1Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
- 2Alimentary Pharmabiotic Centre, University College Cork, Cork, Ireland
| | - Timothy G Dinan
- 2Alimentary Pharmabiotic Centre, University College Cork, Cork, Ireland
- 3Department of Psychiatry, University College Cork, Cork, Ireland
| | - John F Cryan
- 1Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
- 2Alimentary Pharmabiotic Centre, University College Cork, Cork, Ireland
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Melka MG, Castellani CA, Rajakumar N, O'Reilly R, Singh SM. Olanzapine-induced methylation alters cadherin gene families and associated pathways implicated in psychosis. BMC Neurosci 2014; 15:112. [PMID: 25266742 PMCID: PMC4261529 DOI: 10.1186/1471-2202-15-112] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 09/26/2014] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND The complex aetiology of most mental disorders involves gene-environment interactions that may operate using epigenetic mechanisms particularly DNA methylation. It may explain many of the features seen in mental disorders including transmission, expression and antipsychotic treatment responses. This report deals with the assessment of DNA methylation in response to an antipsychotic drug (olanzapine) on brain (cerebellum and hippocampus), and liver as a non-neural reference in a rat model. The study focuses on the Cadherin/protocadherins encoded by a multi-gene family that serve as adhesion molecules and are involved in cell-cell communication in the mammalian brain. A number of these molecules have been implicated in the causation of schizophrenia and related disorders. RESULTS The results show that olanzapine causes changes in DNA methylation, most specific to the promoter region of specific genes. This response is tissue specific and involves a number of cadherin genes, particularly in cerebellum. Also, the genes identified have led to the identification of several pathways significantly affected by DNA methylation in cerebellum, hippocampus and liver. These included the Gα12/13 Signalling (p = 9.2E-08) and Wnt signalling (p = 0.01) pathways as contributors to psychosis that is based on its responsiveness to antipsychotics used in its treatment. CONCLUSION The results suggest that DNA methylation changes on the promoter regions of the Cadherin/protocadherin genes impact the response of olanzapine treatment. These impacts have been revealed through the identified pathways and particularly in the identification of pathways that have been previously implicated in psychosis.
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Affiliation(s)
| | | | | | | | - Shiva M Singh
- Molecular Genetics Unit, Department of Biology, The University of Western Ontario, London, ON N6A 5B7, Canada.
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Abstract
Whereas fear memories are rapidly acquired and enduring over time, extinction memories are slow to form and are susceptible to disruption. Consequently, behavioral therapies that involve extinction learning (e.g., exposure therapy) often produce only temporary suppression of fear and anxiety. This review focuses on the factors that are known to influence the relapse of extinguished fear. Several phenomena associated with the return of fear after extinction are discussed, including renewal, spontaneous recovery, reacquisition, and reinstatement. Additionally, this review describes recent work, which has focused on the role of psychological stress in the relapse of extinguished fear. Recent developments in behavioral and pharmacological research are examined in light of treatment of pathological fear in humans.
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