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Tschetter KE, Callahan LB, Flynn SA, Rahman S, Beresford TP, Ronan PJ. Early life stress and susceptibility to addiction in adolescence. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2021; 161:277-302. [PMID: 34801172 DOI: 10.1016/bs.irn.2021.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Early life stress (ELS) is a risk factor for developing a host of psychiatric disorders. Adolescence is a particularly vulnerable period for the onset of these disorders and substance use disorders (SUDs). Here we discuss ELS and its effects in adolescence, especially SUDs, and their correlates with molecular changes to signaling systems in reward and stress neurocircuits. Using a maternal separation (MS) model of neonatal ELS, we studied a range of behaviors that comprise a "drug-seeking" phenotype. We then investigated potential mechanisms underlying the development of this phenotype. Corticotropin releasing factor (CRF) and serotonin (5-HT) are widely believed to be involved in "stress-induced" disorders, including addiction. Here, we show that ELS leads to the development of a drug-seeking phenotype indicative of increased susceptibility to addiction and concomitant sex-dependent upregulation of CRF and 5-HT system components throughout extended brain reward/stress neurocircuits.
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Affiliation(s)
- K E Tschetter
- Research Service, Sioux Falls VA Healthcare System, Sioux Falls, SD, United States; Department of Psychiatry and Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Sioux Falls, SD, United States; Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Sioux Falls, SD, United States
| | - L B Callahan
- Research Service, Sioux Falls VA Healthcare System, Sioux Falls, SD, United States; Department of Psychiatry and Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Sioux Falls, SD, United States; Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Sioux Falls, SD, United States
| | - S A Flynn
- Department of Psychiatry and Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Sioux Falls, SD, United States
| | - S Rahman
- Department of Pharmaceutical Sciences, South Dakota State University, Brookings, SD, United States
| | - T P Beresford
- Laboratory for Clinical and Translational Research in Psychiatry, Rocky Mountain Regional, VA Medical Center, Aurora, CO, United States; Department of Psychiatry, University of Colorado School of Medicine, Aurora, CO, United States
| | - P J Ronan
- Research Service, Sioux Falls VA Healthcare System, Sioux Falls, SD, United States; Department of Psychiatry and Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Sioux Falls, SD, United States; Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Sioux Falls, SD, United States; Laboratory for Clinical and Translational Research in Psychiatry, Rocky Mountain Regional, VA Medical Center, Aurora, CO, United States.
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Ausmees L, Talts M, Allik J, Vainik U, Sikka TT, Nikopensius T, Esko T, Realo A. Taking risks to feel excitement: Detailed personality profile and genetic associations. EUROPEAN JOURNAL OF PERSONALITY 2021. [DOI: 10.1177/08902070211019242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This study mapped the personality and genetics of risky excitement-seekers focusing on skydiving behavior. We compared 298 skydivers to 298 demographically matched controls across the NEO Personality Inventory-3 domains, facets, and 240 items. The most significant item-level effects were aggregated into a poly-item score of skydiving-associated personality markers (Study 1), where higher scores describe individuals who enjoy risky situations but have no self-control issues. The skydiving-associated personality marker score was associated with greater physical activity, higher rate of traumatic injuries, and better mental health in a sample of 3558 adults (Study 2). From genetic perspective, we associated skydiving behavior with 19 candidate variants that have previously been linked to excitement-seeking (Study 1). Polymorphisms in the SERT gene were the strongest predictors of skydiving, but the false discovery rate-adjusted (FDR-adjusted) p-values were non-significant. In Study 2, we predicted the skydiving-associated personality marker score and E5: Excitement-seeking from multiple risk-taking polygenic scores, using publicly available summary data from genome-wide association studies. While E5: Excitement-seeking was most strongly predicted by general risk tolerance and risky behaviors’ polygenic scores, the skydiving-associated personality marker score was most strongly associated with the adventurousness polygenic scores. Phenotypic and polygenic scores associations suggest that skydiving is a specific—perhaps more functional—form of excitement-seeking, which may nevertheless lead to physical injuries.
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Affiliation(s)
- Liisi Ausmees
- Institute of Psychology, University of Tartu, Estonia
| | - Maie Talts
- Institute of Psychology, University of Tartu, Estonia
| | - Jüri Allik
- Institute of Psychology, University of Tartu, Estonia
- Estonian Academy of Sciences, Estonia
| | - Uku Vainik
- Institute of Psychology, University of Tartu, Estonia
- Montreal Neurological Institute, McGill University, Canada
| | | | | | - Tõnu Esko
- Institute of Genomics, University of Tartu, Estonia
| | - Anu Realo
- Institute of Psychology, University of Tartu, Estonia
- Department of Psychology, University of Warwick, UK
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The Association Between Affective Temperament Traits and Dopamine Genes in Obese Population. Int J Mol Sci 2019; 20:ijms20081847. [PMID: 30991630 PMCID: PMC6515197 DOI: 10.3390/ijms20081847] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 04/10/2019] [Indexed: 12/18/2022] Open
Abstract
Studies indicate the heritable nature of affective temperament, which shows personality traits predisposing to the development of mental disorders. Dopaminergic gene polymorphisms such as DRD4, COMTVal158Met, and DAT1 have been linked to affective disorders in obesity. Due to possible correlation between the aforementioned polymorphisms and the affective temperament, the aim of our research was to investigate this connection in an obese population. The study enrolled 245 obese patients (178 females; 67 males). The affective temperament was assessed using the Temperament Evaluation of Memphis, Pisa, Paris, and San Diego autoquestionnaire (TEMPS-A). Genetic polymorphisms of DAT1, COMTVal158Met and DRD4 were collected from peripheral blood sample and determined using a polymerase chain reaction (PCR). Only in COMT polymorphisms, the cyclothymic and irritable dimensions were significantly associated with Met/Val carriers (p = 0.04; p = 0.01). Another interesting finding was the correlation between the affective temperament and age in men and women. We assume that dopamine transmission in heterozygotes of COMT may determine the role of the affective temperament in obese persons. Dopaminergic transmission modulated by COMT may be responsible for a greater temperament expression in obese individuals. To our knowledge, this is the first study describing the role of affective temperament in the obese population, but more research is needed in this regard.
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Conner BT, Hellemann GS, Demianczyk AC, Ritchie T, Noble EP. Using a Systems-Based Risk Score Approach to Examine Genetic Predisposition to Novelty Seeking. JOURNAL OF INDIVIDUAL DIFFERENCES 2017. [DOI: 10.1027/1614-0001/a000233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Abstract. Previous research is mixed regarding the relation between dopamine and Novelty Seeking. The goals of the current study were to support the hypotheses that Novelty Seeking is associated with dopamine genes and that modeling genetic risk score increases the utility of genetic information in hypothesis-driven research. The results showed that higher hypodopaminergic genetic risk score positively predicted higher Novelty Seeking score, F(1, 115) = 5.76, p < .01, R2 = 0.06. The findings support study hypotheses and, in combination with previous studies, show the utility of empirically validated system-based risk scores as a means of modeling genetic predisposition in neurobiological systems. This approach provides a mechanism for incorporating genetic predisposition into theory-driven multivariate etiological models of psychological constructs such as personality and mental illness.
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Affiliation(s)
- Bradley T. Conner
- Department of Psychology, Colorado State University, Fort Collins, CO, USA
| | - Gerhard S. Hellemann
- Biostatistics Core, Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, University of California Los Angeles, CA, USA
| | | | - Terry Ritchie
- Alcohol Research Center, Department of Psychiatry and Biobehavioral Sciences, Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, University of California Los Angeles, CA, USA
| | - Ernest P. Noble
- Alcohol Research Center, Department of Psychiatry and Biobehavioral Sciences, Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, University of California Los Angeles, CA, USA
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Staes N, Weiss A, Helsen P, Korody M, Eens M, Stevens JMG. Bonobo personality traits are heritable and associated with vasopressin receptor gene 1a variation. Sci Rep 2016; 6:38193. [PMID: 27910885 PMCID: PMC5133571 DOI: 10.1038/srep38193] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 11/04/2016] [Indexed: 11/30/2022] Open
Abstract
Despite being closely related, bonobos and chimpanzees show remarkable behavioral differences, the proximate origins of which remain unknown. This study examined the link between behavioral variation and variation in the vasopressin 1a receptor gene (Avpr1a) in bonobos. Chimpanzees are polymorphic for a ~360 bp deletion (DupB), which includes a microsatellite (RS3) in the 5′ promoter region of Avpr1a. In chimpanzees, the DupB deletion has been linked to lower sociability, lower social sensitivity, and higher anxiety. Chimpanzees and bonobos differ on these traits, leading some to believe that the absence of the DupB deletion in bonobos may be partly responsible for these differences, and to the prediction that similar associations between Avpr1a genotypes and personality traits should be present in bonobos. We identified bonobo personality dimensions using behavioral measures (SociabilityB, BoldnessB, OpennessB, ActivityB) and trait ratings (AssertivenessR, ConscientiousnessR, OpennessR, AgreeablenessR, AttentivenessR, ExtraversionR). In the present study we found that all 10 dimensions have nonzero heritabilities, indicating there is a genetic basis to personality, and that bonobos homozygous for shorter RS3 alleles were lower in AttentivenessR and higher in OpennessB. These results suggest that variations in Avpr1a genotypes explain both within and between species differences in personality traits of bonobos and chimpanzees.
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Affiliation(s)
- Nicky Staes
- Centre for Research and Conservation, Royal Zoological Society of Antwerp, Antwerp, Belgium.,Behavioural Ecology &Ecophysiology Group, Department of Biology, University of Antwerp, Antwerp, Belgium.,Center for Advanced Study of Human Paleobiology, Department of Anthropology, George Washington University, Washington DC, United States of America
| | - Alexander Weiss
- Department of Psychology, School of Philosophy, Psychology and Language Sciences, The University of Edinburgh, United Kingdom.,The Scottish Primate Research Group, United Kingdom
| | - Philippe Helsen
- Centre for Research and Conservation, Royal Zoological Society of Antwerp, Antwerp, Belgium.,Behavioural Ecology &Ecophysiology Group, Department of Biology, University of Antwerp, Antwerp, Belgium
| | - Marisa Korody
- San Diego Zoo Institute for Conservation Research, California, United States of America
| | - Marcel Eens
- Behavioural Ecology &Ecophysiology Group, Department of Biology, University of Antwerp, Antwerp, Belgium
| | - Jeroen M G Stevens
- Centre for Research and Conservation, Royal Zoological Society of Antwerp, Antwerp, Belgium.,Behavioural Ecology &Ecophysiology Group, Department of Biology, University of Antwerp, Antwerp, Belgium
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Wingo T, Nesil T, Choi JS, Li MD. Novelty Seeking and Drug Addiction in Humans and Animals: From Behavior to Molecules. J Neuroimmune Pharmacol 2016; 11:456-70. [PMID: 26481371 PMCID: PMC4837094 DOI: 10.1007/s11481-015-9636-7] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Accepted: 10/13/2015] [Indexed: 12/21/2022]
Abstract
Global treatment of drug addiction costs society billions of dollars annually, but current psychopharmacological therapies have not been successful at desired rates. The increasing number of individuals suffering from substance abuse has turned attention to what makes some people more vulnerable to drug addiction than others. One personality trait that stands out as a contributing factor is novelty seeking. Novelty seeking, affected by both genetic and environmental factors, is defined as the tendency to desire novel stimuli and environments. It can be measured in humans through questionnaires and in rodents using behavioral tasks. On the behavioral level, both human and rodent studies demonstrate that high novelty seeking can predict the initiation of drug use and a transition to compulsive drug use and create a propensity to relapse. These predictions are valid for several drugs of abuse, such as alcohol, nicotine, cocaine, amphetamine, and opiates. On the molecular level, both novelty seeking and addiction are modulated by the central reward system in the brain. Dopamine is the primary neurotransmitter involved in the overlapping neural substrates of both parameters. In sum, the novelty-seeking trait can be valuable for predicting individual vulnerability to drug addiction and for generating successful treatment for patients with substance abuse disorders.
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Affiliation(s)
- Taylor Wingo
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, 450 Ray C Hunt Drive, Suite G-170, Charlottesville, VA, 22903, USA
| | - Tanseli Nesil
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, 450 Ray C Hunt Drive, Suite G-170, Charlottesville, VA, 22903, USA
| | - Jung-Seok Choi
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, 450 Ray C Hunt Drive, Suite G-170, Charlottesville, VA, 22903, USA
- Department of Psychiatry, SMG-SNU Boramae Medical Center and Department of Psychiatry and Behavioral Science, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Ming D Li
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, 450 Ray C Hunt Drive, Suite G-170, Charlottesville, VA, 22903, USA.
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Lee SJ, Park SH, Chae H. Biopsychological structure of Yin-Yang using Cloninger's Temperament model and Carver and White's BIS/BAS scale. PeerJ 2016; 4:e2021. [PMID: 27231654 PMCID: PMC4878383 DOI: 10.7717/peerj.2021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 04/16/2016] [Indexed: 01/28/2023] Open
Abstract
Introduction. The purpose of this study was to examine the psychological structure of Yin-Yang based on the Sasang Personality Questionnaire (SPQ) in relation to Carver and White’s Behavior Inhibition/Behavior Activation System (BIS/BAS) Scale and Cloninger’s temperament model of the West. Methods. A total of 188 university students were classified as high (30%), middle (40%), and low (30%) groups based on their SPQ score and their differences in Cloninger’s temperaments and BIS/BAS subscales were analyzed using analysis of covariance after controlling the sex. Correlation among SPQ, Cloninger’s four temperaments and BIS/BAS subscales was also examined. Results. Significant differences in BAS (F = 11.703, p < .001), Novelty-Seeking (F = 4.945, p < .01), and Harm-Avoidance (F = 10.912, p < .001) were observed between high and low SPQ score groups after controlling for sex. The SPQ showed significant correlation with BAS (r = 0.303), Novelty-Seeking (r = 0.225), and Harm-Avoidance (r = − 0.273). However, BIS showed no significant differences between SPQ groups, and did not show correlation with the SPQ. Discussion. The current study demonstrated that Yin-Yang has similarities with and disparities from the Western tradition and may be examined with objective instruments. We showed that the emotionality of the East which is defined as mobility of emotion, not emotional instability as traditionally defined in Western theories, is pivotal for understanding the nature of emotion in the East. Suggestions are made for cross-cultural psychobiological study of the East and West.
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Affiliation(s)
- Soo Jin Lee
- Department of Psychotherapy, Kyungil University , Daegu , South Korea
| | - Soo Hyun Park
- Department of Psychology, Yonsei University , Seoul , South Korea
| | - Han Chae
- School of Korean Medicine, Pusan National University , Busan , South Korea
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Roemmler-Zehrer J, Geigenberger V, Störmann S, Ising M, Pfister H, Sievers C, Stalla GK, Schopohl J. Specific behaviour, mood and personality traits may contribute to obesity in patients with craniopharyngioma. Clin Endocrinol (Oxf) 2015; 82:106-14. [PMID: 24923438 DOI: 10.1111/cen.12523] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 12/21/2013] [Accepted: 06/03/2014] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Patients with craniopharyngioma (CP) often suffer from obesity, but the underlying causes are still not fully understood. We compared CP to patients with nonfunctioning pituitary adenoma (NFPA) and to a control group (CG) using standardized questionnaires to investigate whether behavioural, mood or personality traits contribute to obesity. METHODS We compared 31 patients with CP (42% male, 53 ± 15·1 years) to 26 patients with NFPA (71% male, 63·2 ± 10·3 years) and to age- and gender-matched local CG (ratio 2:1). Normative data from the literature are included for reference. Patients were asked to complete eleven standardized questionnaires. Two questionnaires were used to evaluate eating disorders (FEV, EDE-Q), one depression (BDI), one anxiety (STAI), three health-related quality of life (SF-36, EuroQoL, QoL-AGHDA), one sleepiness (Epworth Sleepiness Scale), two personality (EPQ-RK, TPQ) and one body image (FKB-20). RESULTS Patients with CP scored significantly higher in conscious hunger perception (FEV, CP 5·8 ± 3·2 scores, NFPA 3·6 ± 3·3 scores, CG 3·0 ± 2·5, P < 0·001). They had similar scores for BDI compared with NFPA, but higher scores to CG (P < 0·001, CP 10·6 ± 8·3, NFPA 7·5 ± 5·7, CG 4·96 ± 4·2). CP and NFPA scored higher than CG for anxiety and personality traits such as harm avoidance, fatigability and asthenia and slightly higher for neuroticism. No differences were seen for EDE-Q, quality of life, daytime sleepiness and body image between CP and NFPA. However, differences could be observed to normative data from the literature. CONCLUSION Obesity in patients with CP might be influenced by eating disorders, negative mood alterations and increased anxiety-related personality traits.
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Affiliation(s)
- J Roemmler-Zehrer
- Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Munich, Germany
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Chen C, Liu C, Chen C, Moyzis R, Chen W, Dong Q. Genetic variations in the serotoninergic system and environmental factors contribute to aggressive behavior in Chinese adolescents. Physiol Behav 2014; 138:62-8. [PMID: 25447480 DOI: 10.1016/j.physbeh.2014.09.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Revised: 06/26/2014] [Accepted: 09/30/2014] [Indexed: 10/24/2022]
Abstract
Aggressive behavior is a major public health problem worldwide and has been associated with many gene variants, especially those related to the serotonin (5-hydroxytryptamine, 5-HT) system, and environmental factors. However, the overall contribution of serotonin-related genes to aggressive behavior is not well understood. With a sample of 478 healthy Chinese volunteers, this study investigated the relation between aggressive behavior and genetic variations of the serotoninergic system (as characterized by 129 representative polymorphisms) interacting with environmental factors (parental warmth and acceptance; stressful life events). We adopted a system-level approach to identify SNPs and environmental factors associated with aggressive behavior, and estimated their overall contribution to aggressive behavior using multiple regression, which was then verified by permutation analysis. We identified 12 SNPs that made statistically significant contributions to aggressive behavior. Next, main effects, interactions among these SNPs, and interactions between these SNPs and environmental factors were assessed using multiple regression. The final model accounted for approximately 19% of the variance for aggressive behavior. Permutation analysis confirmed that the probability of obtaining these findings by chance was low (p=0.045, permuted for 1000 times). These results showed that genetic variations in the serotoninergic system, combined with environmental risk factors, made a moderate contribution to individual differences in aggressive behavior among a healthy population sample.
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Affiliation(s)
- Chunhui Chen
- State Key Laboratory of Cognitive Neuroscience and Learning, IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China; Center for Collaboration and Innovation in Brain and Learning Sciences, Beijing Normal University, Beijing, China
| | - Chang Liu
- Department of Psychology, The Pennsylvania State University, University Park, PA, USA
| | - Chuansheng Chen
- Department of Psychology and Social Behavior, University of California, Irvine, CA, USA
| | - Robert Moyzis
- Department of Biological Chemistry, University of California, Irvine, CA, USA; Institute of Genomics and Bioinformatics, University of California, Irvine, CA, USA
| | - Wen Chen
- State Key Laboratory of Cognitive Neuroscience and Learning, IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China; Center for Collaboration and Innovation in Brain and Learning Sciences, Beijing Normal University, Beijing, China
| | - Qi Dong
- State Key Laboratory of Cognitive Neuroscience and Learning, IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China; Center for Collaboration and Innovation in Brain and Learning Sciences, Beijing Normal University, Beijing, China.
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Thomson CJ, Rajala AK, Carlson SR, Rupert JL. Variants in the dopamine-4-receptor gene promoter are not associated with sensation seeking in skiers. PLoS One 2014; 9:e93521. [PMID: 24691022 PMCID: PMC3972116 DOI: 10.1371/journal.pone.0093521] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2013] [Accepted: 03/06/2014] [Indexed: 11/23/2022] Open
Abstract
Sensation seeking is a personality trait that has been associated with disinhibited behaviours including substance use and gambling, but also with high-risk sport practices including skydiving, paragliding, and downhill skiing. Twin studies have shown that sensation seeking is moderately heritable, and candidate genes encoding components involved in dopaminergic transmission have been investigated as contributing to this type of behaviour. To determine whether variants in the regulatory regions of the dopamine-4-receptor gene (DRD4) influenced sport-specific sensation seeking, we analyzed five polymorphisms (−1106T/C, −906T/C, −809G/A, −291C/T, 120-bp duplication) in the promoter region of the gene in a cohort of skiers and snowboarders (n = 599) that represented a broad range of sensation seeking behaviours. We grouped subjects by genotype at each of the five loci and compared impulsive sensation seeking and domain-specific (skiing) sensation seeking between groups. There were no significant associations between genotype(s) and general or domain-specific sensation seeking in the skiers and snowboarders, suggesting that while DRD4 has previously been implicated in sensation seeking, the promoter variants investigated in this study do not contribute to sensation seeking in this athlete population.
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Affiliation(s)
- Cynthia J. Thomson
- School of Kinesiology, University of British Columbia, Vancouver, British Columbia, Canada
- * E-mail:
| | - Amelia K. Rajala
- Department of Science, University of British Columbia, Vancouver, British Columbia, Canada
| | - Scott R. Carlson
- Department of Psychology, University of Minnesota Duluth, Duluth, Minnesota, United States of America
| | - Jim L. Rupert
- School of Kinesiology, University of British Columbia, Vancouver, British Columbia, Canada
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Shattuck MR, Satkoski-Trask J, Deinard A, Tito RY, Smith DG, Malhi RS. The evolutionary history of SLC6A4 and the role of plasticity in Macaca. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2013; 153:605-16. [PMID: 24375078 DOI: 10.1002/ajpa.22460] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Accepted: 12/03/2013] [Indexed: 11/07/2022]
Abstract
Serotonin has been repeatedly indicated as a biological marker of behavior. In particular, the serotonin transporter gene, SLC6A4, has been the focus of a large body of research. Interestingly, both rhesus macaques (Macaca mulatta) and humans have independently evolved a number of shared polymorphisms for this gene, which is indicative of parallel evolution between the two species. However, little is known about the evolution of this gene, particularly within macaques. Although there are several hypotheses as to the adaptive values of various polymorphisms, few authors have gone beyond theoretical discussion. Here, we examined the genetic variation in SLC6A4 within and between several species of macaques and investigate whether selection has played a significant role in its evolutionary history. In addition, we assayed the promoter region polymorphism, 5-HTTLPR, which is known to play a significant role in regulating both serotonin turnover and behavior. In examining the distribution of the 5-HTTLPR polymorphism, we identified significant differences between Indian and Chinese populations of Macaca mulatta; furthermore, we discovered its presence in Macaca cyclopis, which has not been described before. In regard to the evolutionary history of SLC6A4, we found little evidence for selection and conclude that SLC6A4 largely evolved through neutral processes, possibly due to its potential role in regulating behavioral plasticity. However, we also found very low levels of linkage between the coding regions and 5-HTTLPR. Because we limited evolutionary analyses to the coding regions, it is possible that the promoter region shows a distinct evolutionary history from SLC6A4.
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Affiliation(s)
- Milena R Shattuck
- Department of Anthropology, University of Illinois, Urbana, IL, 61801
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Huang CC, Lu RB, Shih MC, Yen CH, Huang SY. The dopamine transporter gene possibly affects personality traits in patients with early-onset major depressive disorder. Acta Neuropsychiatr 2013; 25:227-34. [PMID: 25287636 DOI: 10.1111/acn.12019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE Comorbid personality pathologies may affect the outcome of patients with major depression (MD). The dopamine transporter gene DAT1 (SLC6A3) has been suggested to play a role in both depression and specific personality traits. The aim of this study was to assess five polymorphisms of the DAT1 gene (rs2550948, rs2975226, rs6347, rs27072, and 3'-VNTR) to determine whether this gene influences personality traits in patients with MD or its subgroups. METHODS The DAT1 polymorphisms were analysed in 463 unrelated Han Chinese MD patients. The personality traits, novelty seeking (NS), and harm avoidance (HA), were examined using the Tridimensional Personality Questionnaire. The patients were also divided into four clinical subgroups on the basis of differences in their sex (male or female) and age at disease onset (early or late). RESULTS There was no association between the DAT1 gene and either NS or HA in the total MD sample or in the sex-based subgroups. However, early-onset MD patients with the G/G genotype of rs2550948 and the T/T genotype of rs2975226 had lower NS scores than did patients with the other genotypes (p corrected = 0.05 for rs2550948 and p corrected = 0.005 for rs2975226). CONCLUSION Our study suggests that DAT1 promoter variants possibly influence specific personality traits in the early-onset subgroup of depressed patients in the Han Chinese population. Further prospective cohort studies are required to verify our preliminary finding and to confirm the effects of personality susceptibility on long-term disease outcomes.
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Affiliation(s)
- Chang-Chih Huang
- 1 Department of Psychiatry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, R.O.C
| | - Ru-Band Lu
- 2 Department of Psychiatry, Institute of Behavioral Medicine, College of Medicine, National Cheng Kung University, Tainan, R.O.C
| | - Mei-Chen Shih
- 1 Department of Psychiatry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, R.O.C
| | - Che-Hung Yen
- 3 Department of Neurology, Tri-Service General Hospital, Taipei, R.O.C
| | - San-Yuan Huang
- 1 Department of Psychiatry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, R.O.C
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Pisula W, Turlejski K, Charles EP. Comparative Psychology as Unified Psychology: The Case of Curiosity and Other Novelty-Related Behavior. REVIEW OF GENERAL PSYCHOLOGY 2013. [DOI: 10.1037/a0032938] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The comparative study of human and nonhuman animals covers the full range of psychological phenomenon, and so comparative psychology already exists as a form of general psychology. The potential of comparative psychology to bring together many aspects of the field of psychology is illustrated through a review of studies exploring curiosity in a variety of species. The issue of an organism's response to novelty was recognized as an important research subject in the era of Darwin. Since that time, considerable empirical and theoretical material on various aspects of behavior associated with new stimuli has been accumulated. This research additionally illustrates the utility of integrative levels theory, which enables a multilevel, comprehensive analysis of behavior. Comparative psychologists played important roles in the history of most of psychology's subdisciplines, and present-day comparative psychologists continue to contribute insights into a startlingly broad range of psychological phenomenon. Further, appreciation for the higher-level research program provided by comparative work provides a larger context that helps ground the study of human psychology.
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Affiliation(s)
- Wojciech Pisula
- Institute of Psychology, Polish Academy of Sciences, Warsaw, Poland
| | - Krzysztof Turlejski
- Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Eric P. Charles
- Psychology Program, The Pennsylvania State University, Altoona
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14
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Barson JR, Fagan SE, Chang GQ, Leibowitz SF. Neurochemical heterogeneity of rats predicted by different measures to be high ethanol consumers. Alcohol Clin Exp Res 2012; 37 Suppl 1:E141-51. [PMID: 22725682 DOI: 10.1111/j.1530-0277.2012.01858.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Accepted: 04/17/2012] [Indexed: 01/07/2023]
Abstract
BACKGROUND Alcoholism is a heterogeneous disease, with subjects possibly differing both in the best measure that predicts their excess consumption and in their most effective pharmacotherapy. Two different measures, high novelty-induced activity and high-fat-induced triglycerides (TGs), are known to identify subgroups of animals prone to consuming higher amounts of ethanol (EtOH). The question investigated here is whether these subgroups are, in fact, similar in their neurochemical phenotype that may contribute to their overconsumption. METHODS EtOH-naïve, Sprague-Dawley rats were subgrouped based on the 2 predictor measures of activity or TG levels, and then quantitative real-time polymerase chain reaction and digoxigenin-labeled in situ hybridization were used to measure their expression of hypothalamic peptides that affect EtOH intake. In additional subgroups subsequently trained to drink 9% EtOH, the opioid antagonist and alcoholism medication, naltrexone, was tested at a low dose (0.02 mg/kg, s.c.) to determine the rats' sensitivity to its effects. RESULTS The 2 measures, while both effective in predicting amount of EtOH intake, were found to identify distinctive subgroups. Rats with high compared to low activity exhibited significantly greater expression of galanin and enkephalin in the paraventricular nucleus (PVN) and of orexin in the perifornical lateral hypothalamus (PFLH), but no difference in melanin-concentrating hormone in PFLH or neuropeptide Y in arcuate nucleus. This contrasts with rats having high TG, which exhibited greater expression only of PVN galanin, along with reduced PFLH orexin. The high-activity rats with elevated enkephalin, but not high-TG rats, were also unusually sensitive to naltrexone, which significantly reduced their alcohol intake. CONCLUSIONS In addition to revealing differences in endogenous peptides and drug responsiveness in predicted high EtOH drinkers, this study demonstrates that these disturbances differ markedly between the 2 at-risk subgroups. This indicates that simple tests may be effective in identifying subjects most responsive to a specific pharmacotherapy.
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Affiliation(s)
- Jessica R Barson
- Laboratory of Behavioral Neurobiology, The Rockefeller University, New York, New York 10065, USA
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Athanasoulia AP, Ising M, Pfister H, Mantzoros CS, Stalla GK, Sievers C. Distinct dopaminergic personality patterns in patients with prolactinomas: a comparison with nonfunctioning pituitary adenoma patients and age- and gender-matched controls. Neuroendocrinology 2012; 96:204-11. [PMID: 22343218 DOI: 10.1159/000335996] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Accepted: 12/11/2011] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Personality patterns such as extraversion and novelty seeking have been associated with an altered dopaminergic activity in healthy subjects. Patients with prolactinomas have been described as exhibiting an altered dopaminergic tone and are often treated with dopamine agonists. Little is known about the personality traits of this patient group. Hence, we aimed at examining whether patients with prolactinomas exhibit modified personality patterns compared to patients with nonfunctioning pituitary adenomas and healthy controls. SUBJECTS/METHODS In this cross-sectional study, 86 patients with prolactinomas and 58 patients with nonfunctioning pituitary adenomas (NFPA) were compared with 172 mentally healthy age- and gender-matched controls. To assess personality traits, standardized personality questionnaires (Eysenck personality questionnaire-EPQ-RK and Tridimensional Personality Questionnaire devised by Cloninger-TPQ) were administered. RESULTS Patients with either prolactinomas or NFPA showed a distinct personality profile compared to the normal population, characterized by increased neuroticism and they also answered in a socially desirable mode. On harm-avoidant total and subscales, they presented with a higher fear of uncertainty and also increased fatigability and asthenia. The prolactinoma patients, when contrasted with the 'clinical' control group of patients with NFPA and after post hoc tests for multiple comparisons following the Bonferroni-Holm procedure showed significantly reduced extraversion (p = 0.044) and increased shyness with strangers (p = 0.044), tending to be more neurotic and present lower scores in the novelty seeking subscale impulsiveness. CONCLUSION This is, to our knowledge, the first study providing new evidence of an altered personality profile of prolactinoma patients which might affect the patient-doctor relationship, treatment and patient's quality of life.
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Affiliation(s)
- A P Athanasoulia
- Department of Internal Medicine, Endocrinology and Clinical Chemistry, Max Planck Institute of Psychiatry, Munich, Germany.
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16
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Klengel T, Heck A, Pfister H, Brückl T, Hennings JM, Menke A, Czamara D, Müller-Myhsok B, Ising M. Somatization in major depression--clinical features and genetic associations. Acta Psychiatr Scand 2011; 124:317-28. [PMID: 21838737 DOI: 10.1111/j.1600-0447.2011.01743.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To identify clinical variables and genetic variations within monoaminergic genes known to be implicated in pain perception that are associated with the occurrence of somatization symptoms in patients with major depression. METHOD Somatization was evaluated using the respective subscale of the Symptom Checklist SCL-90-R. Six monoaminergic genes were identified showing an involvement in pain perception and somatization according to the literature: COMT, HTR2A, SLC6A2, SLC6A4, DRD4, and TPH1. One hundred and eighteen single nucleotide polymorphisms (SNPs) within these genes were genotyped using Illumina BeadChips in a sample of 398 at least moderately to severely depressed in-patients participating in the Munich Antidepressant Response Signature (MARS) project. RESULTS Thirty SNPs exhibit nominally significant associations with somatization. One SNP (rs9534505) located in intron 2 of the HTR2A gene withstood correction for multiple testing. Clinical data provide further evidence for strong impact of somatization on the presentation of depressive symptoms and description of a patient subgroup with unfavorable clinical outcome. CONCLUSION Our results demonstrate the influence of a HTR2A polymorphism on aspects of somatization in major depression, which co-occurs with an unfavorable antidepressant treatment outcome. These results confirm and expand previous findings on somatization as a risk factor for treatment outcome in major depression.
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Affiliation(s)
- T Klengel
- Max Planck Institute of Psychiatry, Kraepelinstrasse, Munich, Germany.
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Li T, Yu S, Du J, Chen H, Jiang H, Xu K, Fu Y, Wang D, Zhao M. Role of novelty seeking personality traits as mediator of the association between COMT and onset age of drug use in Chinese heroin dependent patients. PLoS One 2011; 6:e22923. [PMID: 21857968 PMCID: PMC3157337 DOI: 10.1371/journal.pone.0022923] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Accepted: 07/04/2011] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Personality traits such as novelty seeking (NS) are associated with substance dependence but the mechanism underlying this association remains uncertain. Previous studies have focused on the role of the dopamine pathway. OBJECTIVE Examine the relationships between allelic variants of the catechol-O-methyltransferase (COMT) gene, NS personality traits, and age of onset of drug use in heroin-dependent subjects in China. METHODS The 478 heroin dependent subjects from four drug rehabilitation centers in Shanghai who were genotyped for eight tagging single nucleotide polymorphisms (SNP) on the COMT gene completed the NS subscale from the Temperament and Character Inventory. Multivariate analyses were used to assess the potential mediating role of NS personality traits in the association between COMT gene variants and the age of onset of heroin use. PRINCIPAL FINDINGS AND CONCLUSIONS In the univariate analysis the COMT rs737866 gene variants were independently associated with both NS and age of onset of drug use: those with the TT genotype had higher NS subscale scores and an earlier onset age of heroin use than individuals with CT or CC genotypes. In the multivariate analysis the inclusion of the NS subscore variable weakened the relationship between the COMT rs737866 TT genotype and an earlier age of onset of drug use. Our findings that COMT is associated with both NS personality traits and with the age of onset of heroin use helps to clarify the complex relationship between genetic and psychological factors in the development of substance abuse.
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Affiliation(s)
- Ting Li
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shunying Yu
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jiang Du
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hanhui Chen
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Haifeng Jiang
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ke Xu
- Department of Psychiatry, School of Medicine, Yale University, New Haven, Connecticut, United States of America
| | - Yingmei Fu
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Dongxiang Wang
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Min Zhao
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Wang KS, Liu X, Aragam N, Mullersman JE, Jian X, Pan Y, Liu Y. Polymorphisms in ABLIM1 are associated with personality traits and alcohol dependence. J Mol Neurosci 2011; 46:265-71. [PMID: 21547531 DOI: 10.1007/s12031-011-9530-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Accepted: 04/25/2011] [Indexed: 12/01/2022]
Abstract
Personality traits like novelty seeking (NS), harm avoidance (HA), and reward dependence (RD) are known to be moderately heritable (30-60%). These personality traits and their comorbidities, such as alcohol dependence (AD), may share genetic components. We examined 11,120 single nucleotide polymorphisms (SNPs) genotyped in 292 nuclear families from the Genetic Analysis Workshop 14, a subset from the Collaborative Study on the Genetics of Alcoholism (COGA). A family-based association analysis was performed using the FBAT program. NS, HA, and RD were treated as quantitative traits and AD as a binary trait. Based on a multivariate association test of three quantitative traits in FBAT, we observed 20 SNPs with p < 10(-3). Interestingly, several genes (TESK2, TIPARP, THEMIS, ABLIM1, RFX4, STON2 and LILRA1) are associated with three personality traits with p < 10(-3) using single trait analysis and AD. Especially, SNP rs727532 within ABLIM1 gene at 10q25 showed the most significant association (p = 6.4 × 10(-5)) in the multivariate test and strong associations with NS, HA, RD, and AD (p = 4.48 × 10(-4), 1.2 × 10(-5), 5.6 × 10(-5), 3.12 × 10(-4), respectively) in the COGA sample. In addition, the association of rs727532 with AD was confirmed in a replication study. This study reports some newly recognized associations between several genetic loci and both AD and three personality traits.
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Affiliation(s)
- Ke-Sheng Wang
- Department of Biostatistics and Epidemiology, College of Public Health, East Tennessee State University, PO Box 70259, Lamb Hall, Johnson City, TN, 37614-1700, USA.
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Roberts B, Jackson JJ, Duckworth AL, Von Culin K. Personality Measurement and Assessment in Large Panel Surveys*. Forum Health Econ Policy 2011; 14:1268. [PMID: 23503719 PMCID: PMC3595542 DOI: 10.2202/1558-9544.1268] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Personality tests are being added to large panel studies with increasing regularity, such as the Health and Retirement Study (HRS). To facilitate the inclusion and interpretation of these tests, we provide some general background on personality psychology, personality assessment, and the validity of personality tests. In this review, we provide background on definitions of personality, the strengths and weaknesses of the self-report approaches to personality testing typically used in large panel studies, and the validity of personality tests for three outcomes: genetics, income, and health. We conclude with recommendations on how to improve personality assessment in future panel studies.
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Derringer J, Krueger RF, Dick DM, Saccone S, Grucza RA, Agrawal A, Lin P, Almasy L, Edenberg HJ, Foroud T, Nurnberger JI, Hesselbrock VM, Kramer JR, Kuperman S, Porjesz B, Schuckit MA, Bierut LJ. Predicting sensation seeking from dopamine genes. A candidate-system approach. Psychol Sci 2010; 21:1282-90. [PMID: 20732903 PMCID: PMC3031097 DOI: 10.1177/0956797610380699] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Sensation seeking is a heritable personality trait that has been reliably linked to behavioral disorders. The dopamine system has been hypothesized to contribute to variations in sensation seeking between different individuals, and both experimental and observational studies in humans and nonhuman animals provide evidence for the involvement of the dopamine system in sensation-seeking behavior. In this study, we took a candidate-system approach to genetic association analysis of sensation-seeking behavior. We analyzed single-nucleotide polymorphisms (SNPs) from a number of dopaminergic genes. Using 273 SNPs from eight dopamine genes in a sample of 635 unrelated individuals, we examined the aggregate effect of SNPs that were significantly associated with sensation-seeking behavior. Multiple SNPs in four dopamine genes accounted for significant variance in sensation-seeking behavior between individuals. These results suggest that multiple SNPs, aggregated within genes that are relevant to a specific neurobiological system, form a genetic-risk score that may explain a significant proportion of observed variance in human traits such as sensation-seeking behavior.
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Affiliation(s)
- Jaime Derringer
- Department of Psychology, University of Minnesota, Minneapolis, MN 55455, USA.
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Hildebrandt T, Alfano L, Tricamo M, Pfaff DW. Conceptualizing the role of estrogens and serotonin in the development and maintenance of bulimia nervosa. Clin Psychol Rev 2010; 30:655-68. [PMID: 20554102 DOI: 10.1016/j.cpr.2010.04.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2009] [Revised: 04/24/2010] [Accepted: 04/29/2010] [Indexed: 10/19/2022]
Abstract
Serotonergic dysregulation is thought to underlie much of the pathology in bulimia nervosa (BN). The purpose of this review is to expand the serotonergic model by incorporating specific and nonspecific contributions of estrogens to the development and maintenance of bulimic pathology in order to guide research from molecular genetics to novel therapeutics for BN. Special emphasis is given to the organizing theory of general brain arousal which allows for integration of specific and nonspecific effects of these systems on behavioral endpoints such as binge eating or purging as well as arousal states such as fear, novelty seeking, or sex. Regulation of the serotonergic system by estrogens is explored, and genetic, epigenetic, and environmental estrogen effects on bulimic pathology and risk factors are discussed. Genetic and neuroscientific research support this two-system conceptualization of BN with both contributions to the developmental and maintenance of the disorder. Implications of an estrogenic-serotonergic model of BN are discussed as well as guidelines and suggestions for future research and novel therapeutic targets.
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Affiliation(s)
- Tom Hildebrandt
- Eating and Weight Disorders Program, Mount Sinai School of Medicine, One Gustave L. Levy Place, Box 1230, New York, NY 10029, USA.
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Gong P, Zheng A, Zhang K, Lei X, Li F, Chen D, Chi W, Tong X, Zheng Z, Gao X, Zhang F. Association Analysis Between 12 Genetic Variants of Ten Genes and Personality Traits in a Young Chinese Han Population. J Mol Neurosci 2010; 42:120-6. [DOI: 10.1007/s12031-010-9373-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2010] [Accepted: 04/12/2010] [Indexed: 11/30/2022]
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