scholarly journals Nightmares share strong genetic risk with sleep and psychiatric disorders

2019 ◽  
Author(s):  
Hanna M Ollila ◽  
Nasa Sinnott-Armstrong ◽  
Katri Kantojärvi ◽  
Teemu Palviainen ◽  
Anita Pandit ◽  
...  
Keyword(s):  
Psychiatric Disorders ◽  
Genetic Risk ◽  
Genome Wide Association Study ◽  
Sleep Problems ◽  
The United States ◽  
Psychological Problems ◽  
Traumatic Experiences ◽  
Post Traumatic Stress ◽  
Cross Sectional ◽  
A Genome

ABSTRACTNightmares are vivid, extended and extremely dysphoric dreams that awaken the dreamer. Twin studies indicate that nightmare frequency has a heritability between 36 and 51% providing evidence for genetic factors underlying predisposition to nightmares. Furthermore, while cross-sectional epidemiological findings suggest that heavy alcohol usage, traumatic experiences and psychiatric diseases associate with nightmares, the causal relationships between these conditions and nightmares have remained unknown. To examine the biological mechanisms behind nightmares, we performed a genome-wide association study in 28,596 individuals from Finland and the United States. We identified individual genetic variants that predispose to nightmares near MYOF (rs701873, p=2.18e-8) and PTPRJ (rs11039471,p=3.7e-8), a gene previously associated with sleep duration. We found a strong genetic correlation between the frequency of nightmares and traits related to personality and psychiatric disorders; neuroticism (rg=0.59, p=8e-7), post-traumatic stress disorder (PTSD) (rg=0.58, p=0.004) as well as major depressive disorder (rg=0.68, p=7e-4), and sleep traits; and daytime sleepiness (rg=0.62, p=1e-6) and insomnia (rg=0.50, p=1.87e-5). Analysis of directionality using mendelian randomization showed a significant effect from feelings of fed-up (p=0.001), nervous (p=0.004) and miserableness (p=0.0045) to nightmares with no evidence of pleiotropy and no evidence of nightmares predisposing to psychiatric or psychological problems. Our findings suggest that nightmares are caused by unique genetic risk factors, and here we identify the first individual genetic associations. In addition, a substantial effect on nightmares is conveyed through underlying psychological and sleep problems, with psychological problems being causal for nightmares.

scholarly journals Genome-wide analysis of self-reported risk-taking behaviour and cross-disorder genetic correlations in the UK Biobank cohort

2017 ◽  
Author(s):  
Rona J. Strawbridge ◽  
Joey Ward ◽  
Breda Cullen ◽  
Elizabeth M. Tunbridge ◽  
Sarah Hartz ◽  
...  
Keyword(s):  
Psychiatric Disorders ◽  
Risk Taking ◽  
Genome Wide Association Study ◽  
Genetic Correlations ◽  
Uk Biobank ◽  
Physical And Mental Health ◽  
Post Traumatic Stress ◽  
Genome Wide ◽  
A Genome ◽  
The Uk

AbstractRisk-taking behaviour is a key component of several psychiatric disorders and could influence lifestyle choices such as smoking, alcohol use and diet. As a phenotype, risk-taking behaviour therefore fits within a Research Domain Criteria (RDoC) approach, whereby identifying genetic determinants of this trait has the potential to improve our understanding across different psychiatric disorders. Here we report a genome wide association study in 116 255 UK Biobank participants who responded yes/no to the question “Would you consider yourself a risk-taker?” Risk-takers (compared to controls) were more likely to be men, smokers and have a history of psychiatric disorder. Genetic loci associated with risk-taking behaviour were identified on chromosomes 3 (rs13084531) and 6 (rs9379971). The effects of both lead SNPs were comparable between men and women. The chromosome 3 locus highlights CADM2, previously implicated in cognitive and executive functions, but the chromosome 6 locus is challenging to interpret due to the complexity of the HLA region. Risk-taking behaviour shared significant genetic risk with schizophrenia, bipolar disorder, attention deficit hyperactivity disorder and post-traumatic stress disorder, as well as with smoking and total obesity. Despite being based on only a single question, this study furthers our understanding of the biology of risk-taking behaviour, a trait which has a major impact on a range of common physical and mental health disorders.

scholarly journals Evaluation of the effects of L-Theanine on neurobehavior in an adult male Sprague-Dawley Rat Model of PTSD

2019 ◽  
Vol 6 (3) ◽  
pp. 299-308
Author(s):  
John E Buonora ◽  
Patrick M Krum ◽  
Tomás Eduardo Ceremuga
Keyword(s):  
Spatial Memory ◽  
Traumatic Event ◽  
Forced Swim Test ◽  
The United States ◽  
Traumatic Experiences ◽  
Stress Model ◽  
Sprague Dawley ◽  
Post Traumatic Stress ◽  
Post Traumatic ◽  
Shock Stress

Post-traumatic stress disorder (PTSD) continues to be one of the most common mental health disorders in the United States and may occur in response to traumatic experiences. Currently, there are no interventions that prevent the development of PTSD. L-Theanine (L-Th), a major compound in green tea has been found to decrease anxiety and prevent memory impairment and may have potential effects in the prevention of PTSD. Sixty rats were divided into six experimental groups: control vehicle, control L-Th, control naïve, PTSD vehicle, PTSD Pre-L-Th (prophylactic), PTSD Post-L-Th (non-prophylactic). PTSD was induced by a 3-day restraint/tail shock stress model. The effects of L-Th on neurobehavior were evaluated by Elevated Plus-Maze (EPM), Morris Water Maze (MWM), and Forced Swim Test (FST). Our study found that the total food intake weight of PTSD Pre-L-Th (prophylactic) rats were significantly increased compared to that of PTSD vehicle rats (p = .04). Administration of L-Th 24 hours before the initial PTSD event or for 10 days following the last PTSD stress event did not statistically improve mean open arm exploration on the EPM, spatial memory, and learning in the MWM or behavioral despair measured by the FST (p > 0.05). Although the 3-day restraint/tail shock stress model caused stress in the rodents, it did not produce reported PTSD-like anxiety and depression or spatial memory loss. The effect of Pre-L-Th or Post-L-Th treatment, on the neurobehavioral functions could not be effectively evaluated. However, this study provides a foundation for future studies to try different rodent PTSD models to induce PTSD-like neurobehavioral impairments to explore dosage, frequency, as well as the duration of L-Th administration before and/or after the post-traumatic event. The 3-day restraint/tail shock stress model caused stress in the rodents, Pre-L-Theanine treatment preconditioned the PTSD rats to endure stress.

scholarly journals Depression, resilience and post traumatic stress disorder (PTSD) in asylum-seeker war refugees

2020 ◽  
Author(s):  
Maria Malliarou ◽  
Dimitra Tsapakidi ◽  
Mairi Gouva ◽  
Evaggelia Kotrotsiou ◽  
Athanasios Nikolentzos ◽  
...  
Keyword(s):  
Post Traumatic Stress Disorder ◽  
Traumatic Stress ◽  
Asylum Seeker ◽  
Stress Disorder ◽  
Severe Depression ◽  
Cross Sectional Study ◽  
Traumatic Experiences ◽  
Post Traumatic Stress ◽  
Cross Sectional ◽  
Post Traumatic

Abstract Background The number of refugees and displaced people who have been forced to migrate due to war, mass violence and political instability has reached unprecedented levels. The objective of this study was to assess the degree of depression, resilience and post-traumatic stress disorder (PTSD) in asylum-seeker war refugees, temporally stationed in Larisa, Central Greece, through self-administered questionnaire. Simple regression, Pearson’s correlation coefficient and one-way Anova was used.Methods A cross-sectional study carried out with asylum-seeker war refugees residing in Larisa at a number of apartments rented and ran by the UNHCR and the municipality of Larisa. For the data collection PHQ-9 questionnaire, CD-RISC questionnaire and Harvard Trauma questionnaire (HTQ) were used. Descriptive statistics were applied, as well as Cronbach’s alpha coefficient.Results A total of 64 immigrants (40 males and 23 females, 1-mssing value) agreed to participate in the research. The mean age was 35.72 (SD 7.45), 35 respondents were classified as increased PTSD (scores > 2.5). The results showed a physically and exhausted sample, with marginal mental strength (Mean = 59.38%), fluctuating between moderate (N% = 28.10%) and severe depression (N% = 28.10%). About one in two participants (N% = 54.70%) showed signs of post-traumatic stress disorder PTSD, reporting traumatic experiences that mainly involved immediate events of violence, i.e. beating, while there were very few cases of sexual abuse or violence. A key factor in the formulation of PTSD, depression and Mental Stress Indicators was found to be age but limited to 43 years.Conclusion This study revealed that the refugees of the sample are tired, after being absent and idle for about 2 years from their homeland, in a marginal state of collapse. The most important event-hope that sustains its moderate resilience is the grant of asylum and the hope of arrival in the country of destination.

scholarly journals Genetic risk factors for variant Creutzfeldt–Jakob disease: a genome-wide association study

2009 ◽  
Vol 8 (1) ◽  
pp. 57-66 ◽  
Author(s):  
Simon Mead ◽  
Mark Poulter ◽  
James Uphill ◽  
John Beck ◽  
Jerome Whitfield ◽  
...  
Keyword(s):  
Risk Factors ◽  
Association Study ◽  
Genetic Risk ◽  
Genome Wide Association Study ◽  
Genetic Risk Factors ◽  
Genome Wide Association ◽  
Genome Wide ◽  
A Genome ◽  
Jakob Disease

scholarly journals Genome-wide association study implicates CHRNA2 in cannabis use disorder

2017 ◽  
Author(s):  
Ditte Demontis ◽  
Veera Manikandan Rajagopal ◽  
Thomas D. Als ◽  
Jakob Grove ◽  
Jonatan Pallesen ◽  
...  
Keyword(s):  
Association Study ◽  
Genome Wide Association Study ◽  
Significant Risk ◽  
The United States ◽  
Cannabis Use ◽  
Genome Wide Association ◽  
Cannabis Use Disorder ◽  
Genome Wide ◽  
Independent Population ◽  
A Genome

Introductory paragraphCannabis is the most frequently used illicit psychoactive substance worldwide1. Life time use has been reported among 35-40% of adults in Denmark2 and the United States3. Cannabis use is increasing in the population4–6 and among users around 9% become dependent7. The genetic risk component is high with heritability estimates of 518–70%9. Here we report the first genome-wide significant risk locus for cannabis use disorder (CUD, P=9.31×10−12) that replicates in an independent population (Preplication=3.27×10−3, Pmetaanalysis=9.09×10−12). The finding is based on a genome-wide association study (GWAS) of 2,387 cases and 48,985 controls followed by replication in 5,501 cases and 301,041 controls. The index SNP (rs56372821) is a strong eQTL for CHRNA2 and analyses of the genetic regulated gene expressions identified significant association of CHRNA2 expression in cerebellum with CUD. This indicates a potential therapeutic use in CUD of compounds with agonistic effect on the neuronal acetylcholine receptor alpha-2 subunit encoded by CHRNA2. At the polygenic level analyses revealed a significant decrease in the risk of CUD with increased load of variants associated with cognitive performance.

scholarly journals The Traumatic Life Experiences and Ontological Well-Being: Insights from Narrative Psychology and Self-Memory Theory

2022 ◽  
Author(s):  
Seçil Bülbül ◽  
◽  
Serin Işiaçik ◽  
Keyword(s):  
Life Events ◽  
Life Histories ◽  
Online Survey ◽  
Life Experiences ◽  
Well Being ◽  
Traumatic Experiences ◽  
Post Traumatic Stress ◽  
Narrative Psychology ◽  
Cross Sectional ◽  
The Impact

Ontological well-being adopts a holistic perspective on well-being similar to the narrative psychology when analyzing life histories by referring to past, present, and future aspects of one's life. Relatedly, the self-memory view proposes that life events are self-evaluated. Based on the narrative psychology and self-memory approach, affective life events and emotions are processed in the memory and play a role in structuring self-perceptions and psychological well-being. Therefore, turbulent external conditions such as the pandemic, uncertain environments and socio-economic challenges may lead to traumatic experiences for individuals. Being exposed to traumatic events and experiencing post-traumatic stress harms mental health, well-being, and work performance. This study aims to examine the relationship between traumatic life experiences and ontological well-being within the period of COVID 19 pandemic. It is intended to reveal the impact of traumatic experiences on ontological well-being of individuals in work life. A cross-sectional study was utilized throughout an online survey with the participation of 270 employees working in various private organizations. Following the statistical analyses, the findings were evaluated and both conceptual and practical discussions were provided.

scholarly journals A genome-wide association study of total child psychiatric problems scores

2020 ◽  
Author(s):  
Alexander Neumann ◽  
Ilja M. Nolte ◽  
Irene Pappa ◽  
Tarunveer S. Ahluwalia ◽  
Erik Pettersson ◽  
...  
Keyword(s):  
Association Study ◽  
Psychiatric Disorders ◽  
Genetic Variants ◽  
Genome Wide Association Study ◽  
Genome Wide Association ◽  
Psychiatric Problem ◽  
Problem Score ◽  
Genome Wide ◽  
A Genome ◽  
Psychiatric Problems

ABSTRACTSubstantial genetic correlations have been reported across psychiatric disorders and numerous cross-disorder genetic variants have been detected. To identify the genetic variants underlying general psychopathology in childhood, we performed a genome-wide association study using a total psychiatric problem score. We analyzed 6,844,199 common SNPs in 38,418 school-aged children from 20 population-based cohorts participating in the EArly Genetics and Lifecourse Epidemiology (EAGLE) consortium. The SNP heritability of total psychiatric problems was 5.4% (SE=0.01) and two loci reached genome-wide significance: rs10767094 and rs202005905. We also observed an association of SBF2, a gene associated with neuroticism in previous GWAS, with total psychiatric problems. The genetic effects underlying the total psychiatric problem score were shared with known genetic variants for common psychiatric disorders only (attention-deficit/hyperactivity disorder, anxiety, depression, insomnia) (rG > 0.49), but not with autism or the less common adult disorders (schizophrenia, bipolar disorder, or eating disorders) (rG < 0.01). Importantly, the total psychiatric problem score also showed at least a moderate genetic correlation of with intelligence, educational attainment, wellbeing, smoking, and body fat (rG > 0.29).The results suggest that many common genetic variants are associated with childhood psychiatric symptoms and related phenotypes in general instead of with specific symptoms. Further research is needed to establish causality and pleiotropic mechanisms between psychiatric disorders and related traits.

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