151
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Collantoni E, Michelon S, Tenconi E, Degortes D, Titton F, Manara R, Clementi M, Pinato C, Forzan M, Cassina M, Santonastaso P, Favaro A. Functional connectivity correlates of response inhibition impairment in anorexia nervosa. Psychiatry Res Neuroimaging 2016; 247:9-16. [PMID: 26655584 DOI: 10.1016/j.pscychresns.2015.11.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Revised: 10/12/2015] [Accepted: 11/30/2015] [Indexed: 01/12/2023]
Abstract
Anorexia nervosa (AN) is a disorder characterized by high levels of cognitive control and behavioral perseveration. The present study aims at exploring inhibitory control abilities and their functional connectivity correlates in patients with AN. Inhibitory control - an executive function that allows the realization of adaptive behavior according to environmental contingencies - has been assessed by means of the Stop-Signal paradigm. The study involved 155 patients with lifetime AN and 102 healthy women. A subsample underwent resting-state functional magnetic resonance imaging and was genotyped for COMT and 5-HTTLPR polymorphisms. AN patients showed an impaired response inhibition and a disruption of the functional connectivity of the ventral attention circuit, a neural network implicated in behavioral response when a stimulus occurs unexpected. The 5-HTTLPR genotype appears to significantly interact with the functional connectivity of ventral attention network in explaining task performance in both patients and controls, suggesting a role of the serotoninergic system in mechanisms of response selection. The disruption of the ventral attention network in patients with AN suggests lower efficiency of bottom-up signal filtering, which might be involved in difficulties to adapt behavioral responses to environmental needs. Our findings deserve further research to confirm their scientific and therapeutic implications.
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Affiliation(s)
- Enrico Collantoni
- Psychiatric Clinic, Department of Neurosciences, University of Padova, Via Giustiniani 3, 35128 Padova, Italy
| | - Silvia Michelon
- Psychiatric Clinic, Department of Neurosciences, University of Padova, Via Giustiniani 3, 35128 Padova, Italy
| | - Elena Tenconi
- Psychiatric Clinic, Department of Neurosciences, University of Padova, Via Giustiniani 3, 35128 Padova, Italy
| | - Daniela Degortes
- Psychiatric Clinic, Department of Neurosciences, University of Padova, Via Giustiniani 3, 35128 Padova, Italy
| | - Francesca Titton
- Psychiatric Clinic, Department of Neurosciences, University of Padova, Via Giustiniani 3, 35128 Padova, Italy
| | - Renzo Manara
- Department of Medicine and Surgery, University of Salerno, Italy; IRCCS Istituto San Camillo, Venezia, Italy
| | - Maurizio Clementi
- Clinical Genetics Unit, Department of Woman and Child Health, University of Padova, Italy
| | - Claudia Pinato
- Clinical Genetics Unit, Department of Woman and Child Health, University of Padova, Italy
| | - Monica Forzan
- Clinical Genetics Unit, Department of Woman and Child Health, University of Padova, Italy
| | - Matteo Cassina
- Clinical Genetics Unit, Department of Woman and Child Health, University of Padova, Italy
| | - Paolo Santonastaso
- Psychiatric Clinic, Department of Neurosciences, University of Padova, Via Giustiniani 3, 35128 Padova, Italy
| | - Angela Favaro
- Psychiatric Clinic, Department of Neurosciences, University of Padova, Via Giustiniani 3, 35128 Padova, Italy.
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152
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Eun TK, Jeong SH, Lee KY, Kim SH, Ahn YM, Bang YW, Joo EJ. Association between the 5-HTTLPR Genotype and Childhood Characteristics in Mood Disorders. Clin Psychopharmacol Neurosci 2016; 14:88-95. [PMID: 26792045 PMCID: PMC4730929 DOI: 10.9758/cpn.2016.14.1.88] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 10/11/2015] [Accepted: 11/17/2015] [Indexed: 12/31/2022]
Abstract
Objective The features of childhood attention deficit hyperactivity disorder (ADHD) are significantly associated with adult mood disorders. Some genetic factors may be common to both ADHD and mood disorders underlie the association between these two phenotypes. The present study aimed to determine whether a genetic role may be played by the serotonin transporter-linked polymorphic region (5-HTTLPR) in the childhood ADHD features of adult patients with mood disorders. Methods The present study included 232 patients with major depressive disorder (MDD), 154 patients with bipolar disorder (BPD), and 1,288 normal controls. Childhood ADHD features were assessed with the Korean version of the Wender Utah Rating Scale (WURS-K). The total score and the scores of three factors (impulsivity, inattention, and mood instability) from the WURS-K were analyzed to determine whether they were associated with the 5-HTTLPR genotype. Results In the BPD type II group, the 5-HTTLPR genotype was significantly associated with the total score (p=0.029) and the impulsivity factor (p=0.004) on the WURS-K. However, the inattention and mood instability factors were not associated with the 5-HTTLPR genotype. BPD type I, MDD and normal control groups did not exhibit any significant associations between the WURS-K scores and the 5-HTTLPR genotype. Conclusion The findings suggest that the 5-HTTLPR genotype may play a role in the impulsivity component of childhood ADHD in patients with BPD type II. Because of a small sample size and a single candidate gene, further studies investigating other candidate genes using a larger sample are warranted to determine any common genetic links.
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Affiliation(s)
- Tae Kyung Eun
- Department of Psychiatry, Eulji General Hospital, Seoul, Korea
| | - Seong Hoon Jeong
- Department of Neuropsychiatry, Eulji University School of Medicine, Daejeon, Korea.,Department of Psychiatry, Eulji University Hospital, Daejeon, Korea
| | - Kyu Young Lee
- Department of Psychiatry, Eulji General Hospital, Seoul, Korea.,Department of Neuropsychiatry, Eulji University School of Medicine, Daejeon, Korea
| | - Se Hyun Kim
- Department of Neuropsychiatry, Dongguk University Ilsan Hospital, Dongguk University School of Medicine, Goyang, Korea
| | - Yong Min Ahn
- Departments of Psychiatry and Behavioral Science, Seoul National University College of Medicine, Seoul, Korea.,Department of Neuropsychiatry, Seoul National University Hospital, Seoul, Korea.,Department of Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
| | | | - Eun-Jeong Joo
- Department of Psychiatry, Eulji General Hospital, Seoul, Korea.,Department of Neuropsychiatry, Eulji University School of Medicine, Daejeon, Korea
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153
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Gressier F, Calati R, Serretti A. 5-HTTLPR and gender differences in affective disorders: A systematic review. J Affect Disord 2016; 190:193-207. [PMID: 26519640 DOI: 10.1016/j.jad.2015.09.027] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 09/12/2015] [Accepted: 09/15/2015] [Indexed: 12/31/2022]
Abstract
BACKGROUND Serotonin transporter-linked polymorphic region (5-HTTLPR) variants have been extensively studied in psychiatric disorders. Although gender effects have been reported, they have not been comprehensively reviewed. The aim of our study was to summarize literature findings on 5-HTTLPR and gender differences in affective disorders. METHODS A systematic search of PubMed, ISI Web of Knowledge, and PsycINFO databases was performed for dates until January 2015. The included articles (n=78) analyzed the association between 5-HTTLPR and affective spectrum disorders, taking into account gender. The quality of each study was assessed through STROBE and CONSORT. RESULTS 5-HTTLPR modulation of affective disorders varied by gender. The S allele (or SS genotype) seemed to be differently associated with an increased risk of depression, depressive symptoms, anxiety traits and symptoms, and symptoms of internalizing behavior among women and an increased risk of aggressiveness, conduct disorder and symptom counts of externalizing behavior among men. Moreover, the presence of stressful life events reinforced the association. Interestingly, these differences seemed to begin with adolescence and were not consistent among the elderly, suggesting a plausible role of hormonal fluctuations. LIMITATIONS The review is limited by the small number of included papers, due to the paucity of information in the literature regarding 5-HTTLPR and gender. CONCLUSIONS 5-HTTLPR variants may exert a differential modulation on a number of features depending on gender. Further studies are needed to more deeply investigate the effect of 5-HTTLPR×gender on the modulation of affective disorders.
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Affiliation(s)
- F Gressier
- INSERM UMR 1178, Univ Paris Sud, Department of Psychiatry, Assistance Publique-Hôpitaux de Paris, Bicêtre University Hospital, 78 rue du Général Leclerc, 94275 Le Kremlin Bicêtre, France.
| | - R Calati
- INSERM U1061, University of Montpellier, FondaMental Foundation, Montpellier, France
| | - A Serretti
- Department of Biomedical and Neuromotor Science, University of Bologna, Viale Carlo Pepoli 5, 40123 Bologna, Italy
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154
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Nobile M, Bianchi V, Monzani D, Beri S, Bellina M, Greco A, Colombo P, Tesei A, Caldirola D, Giorda R, Perna G, Molteni M. Effect of family structure and TPH2 G-703T on the stability of dysregulation profile throughout adolescence. J Affect Disord 2016; 190:576-584. [PMID: 26583347 DOI: 10.1016/j.jad.2015.10.057] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 10/09/2015] [Accepted: 10/31/2015] [Indexed: 01/25/2023]
Abstract
BACKGROUND Two different polymorphisms (TPH2 G-703T and 5-HTTLPR) involved in the serotonergic pathway have been reported to play a role, both alone and in interaction with the environment, in early and adult emotion regulation. As most of these studies are cross-sectional, we know little about the impact of these polymorphisms over time, particularly during adolescence. METHODS Because we were interested in the effects of these polymorphisms and environment (i.e., family structure) at different time-points on the emotional dysregulation profile, we performed a path analysis model in a general adolescent population sample of a five-year follow-up study. RESULTS We found a high stability of Dysregulation Profile problems independently from the examined allelic variants. We also found that early family structure directly influences the levels of dysregulation problems in early adolescence, both alone and in interaction with TPH2, suggesting the presence of a gene-environment interaction effect. Furthermore, we found that in adolescents homozygous for the TPH2 G allele, the effect of the early family structure remains active during late adolescence, albeit mediated by earlier emotional problems. LIMITATIONS The high attrition rate, the use of only one source on behavioral problems of adolescents, and the focus on a single polymorphism in the investigated genes could limit the generalizability of the present results. CONCLUSIONS These results suggest that early family structure could play a significant role in the development and maintenance of emotional and behavioral problems not only in early adolescence but also in late-adolescence, although this effect was mediated and moderated by behavioral and genetic variables.
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Affiliation(s)
- Maria Nobile
- Child Psychopathology Unit, Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Lecco, Italy; Department of Clinical Neurosciences, Hermanas Hospitalarias, FoRiPsi, Albese con Cassano, Italy.
| | - Valentina Bianchi
- Child Psychopathology Unit, Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Lecco, Italy; Institute of Molecular Imaging and Physiology, National Research Council, Segrate, Milan, Italy
| | - Dario Monzani
- Department of Psychology, Università degli Studi di Milano Bicocca, Milan, Italy
| | - Silvana Beri
- Molecular Biology Lab, Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Lecco, Italy
| | - Monica Bellina
- Child Psychopathology Unit, Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Lecco, Italy
| | - Andrea Greco
- Department of Psychology, Università degli Studi di Milano Bicocca, Milan, Italy
| | - Paola Colombo
- Child Psychopathology Unit, Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Lecco, Italy
| | - Alessandra Tesei
- Child Psychopathology Unit, Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Lecco, Italy
| | - Daniela Caldirola
- Department of Clinical Neurosciences, Hermanas Hospitalarias, FoRiPsi, Albese con Cassano, Italy
| | - Roberto Giorda
- Molecular Biology Lab, Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Lecco, Italy
| | - Giampaolo Perna
- Department of Clinical Neurosciences, Hermanas Hospitalarias, FoRiPsi, Albese con Cassano, Italy
| | - Massimo Molteni
- Child Psychopathology Unit, Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Lecco, Italy
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155
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Bijttebier S, Caeyenberghs K, van den Ameele H, Achten E, Rujescu D, Titeca K, van Heeringen C. The Vulnerability to Suicidal Behavior is Associated with Reduced Connectivity Strength. Front Hum Neurosci 2015; 9:632. [PMID: 26648857 PMCID: PMC4663245 DOI: 10.3389/fnhum.2015.00632] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 11/05/2015] [Indexed: 01/10/2023] Open
Abstract
Suicidal behavior constitutes a major public health problem. Based on the stress–diathesis model, biological correlates of a diathesis might help to predict risk after stressor-exposure. Structural changes in cortical and subcortical areas and their connections have increasingly been linked with the diathesis. The current study identified structural network changes associated with a diathesis using a whole-brain approach by examining the structural connectivity between regions in euthymic suicide attempters (SA). In addition, the association between connectivity measures, clinical and genetic characteristics was investigated. We hypothesized that SA showed lower connectivity strength, associated with an increased severity of general clinical characteristics and an elevated expression of short alleles in serotonin polymorphisms. Thirteen euthymic SA were compared with fifteen euthymic non-attempters and seventeen healthy controls (HC). Clinical characteristics and three serotonin-related genetic polymorphisms were assessed. Diffusion MRI together with anatomical scans were administered. Preprocessing was performed using Explore DTI. Whole brain tractography of the diffusion-weighted images was followed by a number of streamlines-weighted network analysis using NBS. The network analysis revealed decreased connectivity strength in SA in the connections between the left olfactory cortex and left anterior cingulate gyrus. Furthermore, SA had increased suicidal ideation, hopelessness and self-reported depression, but did not show any differences for the genetic polymorphisms. Finally, lower connectivity strength between the right calcarine fissure and the left middle occipital gyrus was associated with increased trait anxiety severity (rs = −0.78, p < 0.01) and hopelessness (rs = −0.76, p < 0.01). SA showed differences in white matter network connectivity strength associated with clinical characteristics. Together, these variables could play an important role in predicting suicidal behavior.
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Affiliation(s)
- Stijn Bijttebier
- Unit for Suicide Research, Department of Psychiatry and Medical Psychology, Ghent University Ghent, Belgium
| | - Karen Caeyenberghs
- School of Psychology, Faculty of Health Sciences, Australian Catholic University Melbourne, VIC, Australia
| | | | - Eric Achten
- Department of Radiology and Nuclear Medicine, Ghent University Ghent, Belgium ; Ghent Institute for Functional and Metabolic Imaging (GIfMI), Ghent University Ghent, Belgium
| | - Dan Rujescu
- Universitätsklinik und Poliklinik für Psychiatrie, Psychotherapie und Psychosomatik, Martin-Luther-Universität Halle-Wittenberg Halle/Saale, Germany
| | - Koen Titeca
- Department of Psychiatry, AZ Groeninge Kortrijk, Belgium
| | - Cornelis van Heeringen
- Unit for Suicide Research, Department of Psychiatry and Medical Psychology, Ghent University Ghent, Belgium
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156
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Pampel FC, Boardman JD, Daw J, Stallings MC, Smolen A, Haberstick BC, Widaman KF, Neppl TK, Conger RD. Life events, genetic susceptibility, and smoking among adolescents. Soc Sci Res 2015; 54:221-32. [PMID: 26463545 PMCID: PMC4607932 DOI: 10.1016/j.ssresearch.2015.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Revised: 06/15/2015] [Accepted: 08/11/2015] [Indexed: 05/22/2023]
Abstract
Although stressful life events during adolescence are associated with the adoption of unhealthy behaviors such as smoking, both social circumstances and physical traits can moderate the relationship. This study builds on the stress paradigm and gene-environment approach to social behavior by examining how a polymorphism in the serotonin transporter gene 5-HTTLPR moderates the effect of life events on adolescent smoking. Tests of interaction hypotheses use data from the Family Transitions Project, a longitudinal study of 7th graders followed for 5years. A sibling-pair design with separate models for the gender composition of pairs (brothers, sisters, or brother/sister) controls for unmeasured family background. The results show that negative life events are significantly and positively associated with smoking. Among brother pairs but not other pairs, the results provide evidence of gene-environment interaction by showing that life events more strongly influence smoking behavior for those with more copies of the 5-HTTLPR S allele.
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Affiliation(s)
- Fred C Pampel
- Institute of Behavioral Science, University of Colorado Boulder, United States.
| | - Jason D Boardman
- Institute of Behavioral Science, University of Colorado Boulder, United States
| | - Jonathan Daw
- Department of Sociology, Pennsylvania State University, United States
| | - Michael C Stallings
- Institute for Behavioral Genetics, University of Colorado Boulder, United States
| | - Andrew Smolen
- Institute for Behavioral Genetics, University of Colorado Boulder, United States
| | - Brett C Haberstick
- Institute for Behavioral Genetics, University of Colorado Boulder, United States
| | - Keith F Widaman
- Department of Psychology, University of California Davis, United States
| | - Tricia K Neppl
- Department of Human Development and Family Studies, Iowa State University, United States
| | - Rand D Conger
- Department of Human Ecology, University of California Davis, United States
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157
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Vrijsen JN, Tendolkar I, Arias-Vásquez A, Franke B, Schene AH, Fernández G, van Oostrom I. Interaction of the 5-HTTLPR and childhood trauma influences memory bias in healthy individuals. J Affect Disord 2015; 186:83-9. [PMID: 26232751 DOI: 10.1016/j.jad.2015.06.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 06/09/2015] [Accepted: 06/09/2015] [Indexed: 10/23/2022]
Abstract
The tendency to recall more negative and less positive information has been frequently related to the genetic susceptibility to depression. This memory bias may be associated with depression candidate genes especially in individuals who experienced stressful childhood events. The serotonin transporter gene, SLC6A4/5-HTT, regulates the reuptake of serotonin. The 5-HTTLPR polymorphism in the gene's promoter region has a short (S) and a long (L) allele, of which L contains a further SNP (rs25531), resulting in a triallelic polymorphism: La, Lg, and S. Both S and Lg result in increased serotonin signaling (to simplify, we refer to both alleles as 'S'), which in turn appears associated with depression vulnerability, specifically in individuals with stressful events. In non-depressed individuals (N=1083), we examined the interaction between the 5-HTTLPR genotype (LaLa, SLa, and SS) and stressful childhood events in association with explicit verbal memory bias (positive, negative). Two types of stressful childhood events were studied, namely childhood adverse events (e.g. parental loss) and interpersonal traumatic childhood events (e.g. abuse). Less positive memory bias was found for individuals with the SS genotype who had experienced interpersonal childhood traumatic events. No general association of genotype with memory bias was found, nor was there a significant interaction between genotype and childhood adverse events. Our results suggest that the depression-susceptibility genotype of the 5-HTTLPR is associated with depressive information processing styles when occurring in combination with traumatic childhood events. Tailoring treatment to specific risk profiles based on genetic susceptibility and childhood stress could be promising.
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Affiliation(s)
- Janna N Vrijsen
- Radboud University Medical Center, Department of Psychiatry, Nijmegen, The Netherlands; Radboud University, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands.
| | - Indira Tendolkar
- Radboud University Medical Center, Department of Psychiatry, Nijmegen, The Netherlands; Radboud University, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - Alejandro Arias-Vásquez
- Radboud University Medical Center, Department of Psychiatry, Nijmegen, The Netherlands; Radboud University, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; Radboud University Medical Center, Department of Human Genetics, Nijmegen, The Netherlands; Radboud University Medical Center, Department of Cognitive Neurosciences, Nijmegen, The Netherlands
| | - Barbara Franke
- Radboud University Medical Center, Department of Psychiatry, Nijmegen, The Netherlands; Radboud University, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; Radboud University Medical Center, Department of Human Genetics, Nijmegen, The Netherlands
| | - Aart H Schene
- Radboud University Medical Center, Department of Psychiatry, Nijmegen, The Netherlands; Radboud University, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - Guillén Fernández
- Radboud University, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; Radboud University Medical Center, Department of Cognitive Neurosciences, Nijmegen, The Netherlands
| | - Iris van Oostrom
- Radboud University Medical Center, Department of Psychiatry, Nijmegen, The Netherlands; Radboud University, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
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158
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Lei MK, Beach SRH, Simons RL, Philibert RA. Neighborhood crime and depressive symptoms among African American women: Genetic moderation and epigenetic mediation of effects. Soc Sci Med 2015; 146:120-8. [PMID: 26513121 DOI: 10.1016/j.socscimed.2015.10.035] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 09/23/2015] [Accepted: 10/16/2015] [Indexed: 12/27/2022]
Abstract
INTRODUCTION Social scientists have long recognized the important role that neighborhood crime can play in stress-related disease, but very little is known about potential biosocial mechanisms that may link the experience of living in high-crime neighborhoods with depression. OBJECTIVE The current study introduces an integrated model that combines neighborhood, genetic, and epigenetic factors. METHODS Hypotheses were tested with a sample of 99 African American women from the Family and Community Health Study (FACHS). RESULTS Allele variants of the serotonin transporter gene (5-HTT) interact with neighborhood crime to predict depressive symptoms in a manner consonant with the differential susceptibility perspective. Furthermore, this association is mediated by DNA methylation of the promoter region of the serotonin transporter gene. CONCLUSION The findings provide support for an integrated model in which changes in DNA methylation, resulting from neighborhood crime, can result in an increase or decrease in gene activity which, in turn, influences depressive symptoms.
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Affiliation(s)
- Man-Kit Lei
- Center for Family Research, University of Georgia, USA.
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159
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Klumpers F, Kroes MC, Heitland I, Everaerd D, Akkermans SEA, Oosting RS, van Wingen G, Franke B, Kenemans JL, Fernández G, Baas JMP. Dorsomedial Prefrontal Cortex Mediates the Impact of Serotonin Transporter Linked Polymorphic Region Genotype on Anticipatory Threat Reactions. Biol Psychiatry 2015; 78:582-9. [PMID: 25444169 DOI: 10.1016/j.biopsych.2014.07.034] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Revised: 07/18/2014] [Accepted: 07/25/2014] [Indexed: 12/16/2022]
Abstract
BACKGROUND Excessive anticipatory reactions to potential future adversity are observed across a range of anxiety disorders, but the neurogenetic mechanisms driving interindividual differences are largely unknown. We aimed to discover and validate a gene-brain-behavior pathway by linking presumed genetic risk for anxiety-related psychopathology, key neural activity involved in anxious anticipation, and resulting aversive emotional states. METHODS The functional neuroanatomy of aversive anticipation was probed through functional magnetic resonance imaging in two independent samples of healthy subjects (n = 99 and n = 69), and we studied the influence of genetic variance in the serotonin transporter linked polymorphic region (5-HTTLPR). Skin conductance and startle data served as objective psychophysiological indices of the intensity of individuals' anticipatory responses to potential threat. RESULTS Threat cues signaling risk of future electrical shock activated the dorsomedial prefrontal cortex (dmPFC), anterior insula, bed nucleus of the stria terminalis, thalamus, and midbrain consistently across both samples. Threat-related dmPFC activation was enhanced in 5-HTTLPR short allele carriers in sample 1 and this effect was validated in sample 2. Critically, we show that this region mediates the increase in anticipatory psychophysiological reactions in short allele carriers indexed by skin conductance (experiment 1) and startle reactions (experiment 2). CONCLUSIONS The converging results from these experiments demonstrate that innate 5-HTTLPR linked variation in dmPFC activity predicts psychophysiological responsivity to pending threats. Our results reveal a neurogenetic pathway mediating interindividual variability in anticipatory responses to threat and yield a novel mechanistic account for previously reported associations between genetic variability in serotonin transporter function and stress-related psychopathology.
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Affiliation(s)
- Floris Klumpers
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen; Department of Experimental Psychology, Utrecht University, Utrecht.
| | - Marijn C Kroes
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen
| | - Ivo Heitland
- Department of Experimental Psychology, Utrecht University, Utrecht
| | - Daphne Everaerd
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen; Department of Psychiatry, Radboud University Medical Center, Nijmegen
| | | | - Ronald S Oosting
- Department of Pharmacology, Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Utrecht
| | - Guido van Wingen
- Brain Imaging Center, Academic Medical Center, University of Amsterdam, Amsterdam
| | - Barbara Franke
- Department of Psychiatry, Radboud University Medical Center, Nijmegen; Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - J Leon Kenemans
- Department of Experimental Psychology, Utrecht University, Utrecht
| | - Guillén Fernández
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen
| | - Johanna M P Baas
- Department of Experimental Psychology, Utrecht University, Utrecht
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160
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Brumariu LE, Bureau JF, Nemoda Z, Sasvari-Szekely M, Lyons-Ruth K. Attachment and Temperament Revisited: Infant Distress, Attachment Disorganization, and the Serotonin Transporter Polymorphism. J Reprod Infant Psychol 2015; 34:77-89. [PMID: 26912941 DOI: 10.1080/02646838.2015.1072764] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE This study's aim was to evaluate whether infant disorganized attachment and infant proneness to distress exhibited differential relations to infant genetic factors as indexed by the serotonin transporter polymorphism. BACKGROUND The role of the short allele of the serotonin transporter polymorphism (5-HTTLPR) in enhancing sensitivity to fearful and negative affect has been well-established (Canli & Lesch, 2007). In the current study, we used this known property of the short allele to provide a test of an important postulate of attachment theory, namely that infant attachment security or disorganization is not a function of the infant's proneness to distress. METHODS Participants were 39 parents and infants assessed between 12 and 18 months in the Strange Situation procedure. Genotype categories for the 5-HTTLPR (and rs25531) were created by both the original and the reclassified grouping system; infant proneness to distress was assessed directly in the Strange Situation Procedure. We also assessed maternal behavior at 18 months to evaluate whether any observed genetic effect indicated a passive effect through the mother. RESULTS Consistent with previous findings, the 5-HTTLPR short allele was significantly related to the infant's wariness and distress, but was not related to attachment security or attachment disorganization. In addition, maternal disrupted interaction with the infant was not related to infant genotype or infant distress. CONCLUSION Results support the concept that infant proneness to distress is associated with serotonergic factors while infant attachment security or disorganization is not a function of either 5-HTTLPR or behaviorally rated proneness to distress.
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161
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Omari-Asor L, Stewart R, Artero S, Ritchie K. 5-HTTLPR genotype, asthma, diabetes and late-life depression in an older French population. Int J Geriatr Psychiatry 2015; 30:1017-22. [PMID: 25640317 DOI: 10.1002/gps.4255] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 12/02/2014] [Accepted: 12/09/2014] [Indexed: 01/15/2023]
Abstract
OBJECTIVE Associations between environmental risk factors and depression have been reported to be stronger in people with the S allele of the S/L polymorphism in the serotonin transporter gene-linked promoter region (5-HTTLPR); however, most studies have focused on adverse life events as a general exposure, and interactions with physical disorders have been less investigated. We therefore investigated associations of asthma and diabetes with depression in an older community population and compared these by 5-HTTLPR genotype. METHODS A sample of 1617 people aged 65 years and over, from Montpellier, France, were examined for depression, using the Center for Epidemiologic Studies Depression Scale and Mini International Neuropsychiatric Interview assessments, and a standardised interview was conducted to establish physical health status. Blood samples were also taken for 5-HTTLPR genotype. RESULTS Depression was significantly associated with asthma and diabetes but not with 5-HTTLPR genotype. After adjustment for age, sex, education and co-residency, the association between asthma and depression did increase in strength and significance across genotype groups (odds ratios in LL, SL and SS genotypes: 1.59 (0.66-3.82), 1.88 (1.05-3.36) and 3.00 (1.26-7.13), respectively) although the interaction term fell below statistical significance (p = 0.29). No modification was observed for diabetes as an exposure. CONCLUSIONS The findings provided some support for effect modification by 5-HTTLPR genotype for asthma but for not diabetes as risk factors for depression.
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Affiliation(s)
- Lorraine Omari-Asor
- King's College London, Institute of Psychiatry, Psychology & Neuroscience, London, SE5 8AF, UK
| | - Robert Stewart
- King's College London, Institute of Psychiatry, Psychology & Neuroscience, London, SE5 8AF, UK
| | - Sylvaine Artero
- Inserm, U888, Montpellier, F-34093, France.,Univ Montpellier 1, Montpellier, F-34006, France
| | - Karen Ritchie
- Inserm, U888, Montpellier, F-34093, France.,Univ Montpellier 1, Montpellier, F-34006, France
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162
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Luo S, Yu D, Han S. Genetic and neural correlates of romantic relationship satisfaction. Soc Cogn Affect Neurosci 2015; 11:337-48. [PMID: 26385612 DOI: 10.1093/scan/nsv117] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Accepted: 09/14/2015] [Indexed: 11/12/2022] Open
Abstract
Romantic relationship satisfaction (RRS) is important for mental/physical health but varies greatly across individuals. To date, we have known little about the biological (genetic and neural) correlates of RRS. We tested the hypothesis that the serotonin transporter promoter polymorphism (5-HTTLPR), the promoter region of the gene SLC6A4 that codes for the serotonin transporter protein, is associated with individuals' RRS. Moreover, we investigated neural activity that mediates 5-HTTLPR association with RRS by scanning short-short (s/s) and long-long (l/l) homozygotes of 5-HTTLPR, using functional MRI, during a Cyberball game that resulted in social exclusion. l/l compared with s/s allele carriers reported higher RRS but lower social interaction anxiety. l/l compared with s/s carriers showed stronger activity in the right ventral prefrontal cortex (RVPFC) and stronger functional connectivity between the dorsal and rostral ACC when being excluded from the Cyberball game. Moreover, the 5-HTTLPR association with RRS was mediated by the RVPFC activity and the 5-HTTLPR association with social interaction anxiety was mediated by both the dorsal-rostral ACC connectivity and RVPFC activity. Our findings suggest that 5-HTTLPR is associated with satisfaction of one's own romantic relationships and this association is mediated by the neural activity in the brain region related to emotion regulation.
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Affiliation(s)
- Siyang Luo
- Department of Psychology, PKU-IDG/McGovern Institute for Brain Research, Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing 100871, China
| | - Dian Yu
- Department of Psychology, PKU-IDG/McGovern Institute for Brain Research, Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing 100871, China
| | - Shihui Han
- Department of Psychology, PKU-IDG/McGovern Institute for Brain Research, Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing 100871, China
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163
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Shi Z, Ma Y, Wu B, Wu X, Wang Y, Han S. Neural correlates of reflection on actual versus ideal self-discrepancy. Neuroimage 2015; 124:573-580. [PMID: 26375210 DOI: 10.1016/j.neuroimage.2015.08.077] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 07/31/2015] [Accepted: 08/16/2015] [Indexed: 01/12/2023] Open
Abstract
Subjective feelings of actual/ideal self-discrepancy vary across individuals and influence one's own affective states. However, the neural correlates of actual/ideal self-discrepancy and their genetic individual differences remain unknown. We investigated neural correlates of actual/ideal self-discrepancy and their associations with the serotonin transporter promoter polymorphism (5-HTTLPR) that moderates human affective states during self-reflection. We scanned short/short and long/long allele carriers of 5-HTTLPR, using functional MRI, during reflection on the distance between actual and ideal self in personality traits. We found that larger actual/ideal self-discrepancy was associated with activations in the ventral/dorsal striatum and dorsal medial and lateral prefrontal cortices. Moreover, these brain activities were stronger in short/short than long/long allele carriers and predicted self-report of life satisfaction in short/short carriers but trait depression in long/long carriers. Our findings revealed neural substrates of actual/ideal self-discrepancy and their associations with affective states that are sensitive to individuals' genetic makeup.
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Affiliation(s)
- Zhenhao Shi
- Department of Psychology, PKU-IDG/McGovern Institute for Brain Research, Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing, China
| | - Yina Ma
- Department of Psychology, PKU-IDG/McGovern Institute for Brain Research, Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing, China
| | - Bing Wu
- Department of Radiology, Beijing Military General Hospital, Beijing, China
| | - Xinhuai Wu
- Department of Radiology, Beijing Military General Hospital, Beijing, China
| | - Yuanye Wang
- Department of Psychology, PKU-IDG/McGovern Institute for Brain Research, Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing, China
| | - Shihui Han
- Department of Psychology, PKU-IDG/McGovern Institute for Brain Research, Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing, China.
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164
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Arpawong TE, Lee J, Phillips DF, Crimmins EM, Levine ME, Prescott CA. Effects of Recent Stress and Variation in the Serotonin Transporter Polymorphism ( 5-HTTLPR) on Depressive Symptoms: A Repeated-Measures Study of Adults Age 50 and Older. Behav Genet 2015; 46:72-88. [PMID: 26330209 DOI: 10.1007/s10519-015-9740-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Accepted: 08/21/2015] [Indexed: 12/16/2022]
Abstract
Depending on genetic sensitivity to it, stress may affect depressive symptomatology differentially. Applying the stress-diathesis hypothesis to older adults, we postulate: (1) recent stress will associate with increased depressive symptom levels and (2) this effect will be greater for individuals with at least one short allele of the serotonin transporter gene promoter region (5-HTTLPR). Further, we employ a design that addresses specific limitations of many prior studies that have examined the 5-HTTLPR × SLE relation, by: (a) using a within-person repeated-measures design to address fluctuations that occur within individuals over time, increase power for detecting G × E, and address GE correlation; (b) studying reports of exogenous stressful events (those unlikely to be caused by depression) to help rule out reverse causation and negativity bias, and in order to assess stressors that are more etiologically relevant to depressive symptomatology in older adults. The sample is drawn from the Health and Retirement Study, a U.S. population-based study of older individuals (N = 28,248; mean age = 67.5; 57.3 % female; 80.7 % Non-Hispanic White, 14.9 % Hispanic/Latino, 4.5 % African American; genetic subsample = 12,332), from whom measures of depressive symptoms and exogenous stressors were collected biannually (1994-2010). Variation in the 5-HTTLPR was characterized via haplotype, using two single nucleotide polymorphisms (SNPs). Ordered logit models were constructed to predict levels of depressive symptoms from 5-HTTLPR and stressors, comparing results of the most commonly applied statistical approaches (i.e., comparing allelic and genotypic models, and continuous and categorical predictors) used in the literature. All models were stratified by race/ethnicity. Overall, results show a main effect of recent stress for all ethnic groups, and mixed results for the variation in 5-HTTLPR × stress interaction, contingent upon statistical model used. Findings suggest there may be a differential effect of stressors and 5-HTTLPR on depressive symptoms by ethnicity, but further research is needed, particularly when using a haplotype to characterize variation in 5-HTTLPR in population-based sample with a diverse ethnic composition.
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Affiliation(s)
- Thalida E Arpawong
- Department of Psychology, University of Southern California, 3620 South McClintock Ave, SGM 501 MC 1061, Los Angeles, CA, 90089-1061, USA.
| | - Jinkook Lee
- Dornsife Center for Economic and Social Research, University of Southern California, Los Angeles, CA, USA.,RAND Corporation, Santa Monica, CA, USA
| | - Drystan F Phillips
- Dornsife Center for Economic and Social Research, University of Southern California, Los Angeles, CA, USA.,RAND Corporation, Santa Monica, CA, USA
| | - Eileen M Crimmins
- Davis School of Gerontology, University of Southern California, Los Angeles, CA, USA
| | - Morgan E Levine
- Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Carol A Prescott
- Department of Psychology, University of Southern California, 3620 South McClintock Ave, SGM 501 MC 1061, Los Angeles, CA, 90089-1061, USA.,Davis School of Gerontology, University of Southern California, Los Angeles, CA, USA
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165
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Fischer AG, Endrass T, Reuter M, Kubisch C, Ullsperger M. Serotonin reuptake inhibitors and serotonin transporter genotype modulate performance monitoring functions but not their electrophysiological correlates. J Neurosci 2015; 35:8181-90. [PMID: 26019334 DOI: 10.1523/JNEUROSCI.5124-14.2015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Serotonin (5-HT) has been hypothesized to be implicated in performance monitoring by promoting behavioral inhibition in the face of aversive events. However, it is unclear whether this is restricted to external (punishment) or includes internal (response errors) events. The aim of the current study was to test whether higher 5-HT levels instigate inhibition specifically in the face of errors, measured as post-error slowing (PES), and whether this is represented in electrophysiological correlates of error processing, namely error-related negativity (ERN) and positivity. Therefore, from a large sample of human subjects (n = 878), two extreme groups were formed regarding hypothesized high and low 5-HT transporter (5-HTT) expression based on 5-HTTLPR and two additional single nucleotide polymorphisms (rs25531, rs25532). Seventeen higher (LL) and 15 lower (SS) expressing Caucasian subjects were administered the selective serotonin reuptake inhibitor (SSRI) citalopram (10 mg) intravenously in a double-blind crossover design. We found pharmacogenetic evidence for a role of 5-HT in mediating PES: SSRI administration increased PES in both genetic groups, and SS subjects displayed higher PES. These effects were absent on post-conflict slowing. However, ERN and error positivity were unaffected by pharmacogenetic factors, but ERN was decoupled from behavioral adaptation by SSRI administration in the LL group. Thus, pharmacogenetic evidence suggests that increased 5-HT levels lead to behavioral inhibition in the context of internal aversive events, but electrophysiological correlates of performance monitoring appear unrelated to the 5-HT system. Therefore, our findings are consistent with theories suggesting that 5-HT mediates the link between aversive processing and inhibition.
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166
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Madsen MK, Mc Mahon B, Andersen SB, Siebner HR, Knudsen GM, Fisher PM. Threat-related amygdala functional connectivity is associated with 5-HTTLPR genotype and neuroticism. Soc Cogn Affect Neurosci 2015; 11:140-9. [PMID: 26245837 DOI: 10.1093/scan/nsv098] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Accepted: 07/30/2015] [Indexed: 01/27/2023] Open
Abstract
Communication between the amygdala and other brain regions critically regulates sensitivity to threat, which has been associated with risk for mood and affective disorders. The extent to which these neural pathways are genetically determined or correlate with risk-related personality measures is not fully understood. Using functional magnetic resonance imaging, we evaluated independent and interactive effects of the 5-HTTLPR genotype and neuroticism on amygdala functional connectivity during an emotional faces paradigm in 76 healthy individuals. Functional connectivity between left amygdala and medial prefrontal cortex (mPFC) and between both amygdalae and a cluster including posterior cingulate cortex, precuneus and visual cortex was significantly increased in 5-HTTLPR S' allele carriers relative to L(A)L(A) individuals. Neuroticism was negatively correlated with functional connectivity between right amygdala and mPFC and visual cortex, and between both amygdalae and left lateral orbitofrontal (lOFC) and ventrolateral prefrontal cortex (vlPFC). Notably, 5-HTTLPR moderated the association between neuroticism and functional connectivity between both amygdalae and left lOFC/vlPFC, such that S' carriers exhibited a more negative association relative to L(A)L(A) individuals. These findings provide novel evidence for both independent and interactive effects of 5-HTTLPR genotype and neuroticism on amygdala communication, which may mediate effects on risk for mood and affective disorders.
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Affiliation(s)
- Martin Korsbak Madsen
- Neurobiology Research Unit and Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, 2100 Copenhagen O, Denmark
| | - Brenda Mc Mahon
- Neurobiology Research Unit and Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, 2100 Copenhagen O, Denmark
| | - Sofie Bech Andersen
- Neurobiology Research Unit and Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, 2100 Copenhagen O, Denmark
| | - Hartwig Roman Siebner
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, 2100 Copenhagen O, Denmark, Danish Research Centre for Magnetic Resonance, Copenhagen University Hospital Hvidovre, 2650 Hvidovre, Denmark, and Department of Neurology, Copenhagen University Hospital Bispebjerg, 2400 Copenhagen NW, Denmark
| | - Gitte Moos Knudsen
- Neurobiology Research Unit and Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, 2100 Copenhagen O, Denmark,
| | - Patrick MacDonald Fisher
- Neurobiology Research Unit and Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, 2100 Copenhagen O, Denmark
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167
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Christou AI, Wallis Y, Bair H, Crawford H, Frisson S, Zeegers MP, McCleery JP. BDNF Val(66)Met and 5-HTTLPR Genotype are Each Associated with Visual Scanning Patterns of Faces in Young Children. Front Behav Neurosci 2015. [PMID: 26217202 PMCID: PMC4500100 DOI: 10.3389/fnbeh.2015.00175] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Previous studies have documented both neuroplasticity-related BDNF Val(66)Met and emotion regulation-related 5-HTTLPR polymorphisms as genetic variants that contribute to the processing of emotions from faces. More specifically, research has shown the BDNF Met allele and the 5-HTTLPR Short allele to be associated with mechanisms of negative affectivity that relate to susceptibility for psychopathology. We examined visual scanning pathways in response to angry, happy, and neutral faces in relation to BDNF Val(66)Met and 5-HTTLPR genotyping in 49 children aged 4-7 years. Analyses revealed that variations in the visual processing of facial expressions of anger interacted with BDNF Val(66)Met genotype, such that children who carried at least one low neuroplasticity Met allele exhibited a vigilance-avoidance pattern of visual scanning compared to homozygotes for the high neuroplasticity Val allele. In a separate investigation of eye gaze towards the eye versus mouth regions of neutral faces, we observed that short allele 5-HTTLPR carriers exhibited reduced looking at the eye region compared with those with the higher serotonin uptake Long allele. Together, these findings suggest that genetic mechanisms early in life may influence the establishment of patterns of visual scanning of environmental stressors, which in conjunction with other factors such as negative life events, may lead to psychological difficulties and disorders in the later adolescent and adult years.
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Affiliation(s)
| | - Yvonne Wallis
- West Midlands Regional Genetics Laboratory, Birmingham Women's Hospital, NHS Foundation Trust , Birmingham , UK
| | - Hayley Bair
- West Midlands Regional Genetics Laboratory, Birmingham Women's Hospital, NHS Foundation Trust , Birmingham , UK
| | - Hayley Crawford
- Centre for Research in Psychology, Behaviour and Achievement, Coventry University , Coventry , UK ; Cerebra Centre for Neurodevelopmental Disorders, School of Psychology, University of Birmingham , Birmingham , UK
| | - Steven Frisson
- School of Psychology, University of Birmingham , Birmingham , UK
| | - Maurice P Zeegers
- Department of Complex Genetics, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University , Maastricht , Netherlands
| | - Joseph P McCleery
- School of Psychology, University of Birmingham , Birmingham , UK ; Center for Autism Research, Children's Hospital of Philadelphia , Philadelphia, PA , USA
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168
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Reinelt E, Barnow S, Stopsack M, Aldinger M, Schmidt CO, John U, Grabe HJ. Social support and the serotonin transporter genotype ( 5-HTTLPR) moderate levels of resilience, sense of coherence, and depression. Am J Med Genet B Neuropsychiatr Genet 2015; 168B:383-91. [PMID: 25989139 DOI: 10.1002/ajmg.b.32322] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 04/28/2015] [Indexed: 11/08/2022]
Abstract
Gene x environment interactions have mainly been investigated in models of psychopathology. However, the putative interplay between genes and beneficial environmental conditions on positive outcomes has rarely been addressed. We therefore examined the interaction between the serotonin transporter linked polymorphic region (5-HTTLPR) and social support on the sense of coherence (SOC), resilience, and depressive symptoms. Furthermore, we scrutinized our examinations by differentiating between individuals with and without childhood abuse. The sample included 1,811 participants from the general population (Study of Health in Pomerania, Germany). The triallelic genotype of 5-HTTLPR was determined and longitudinal data of social support were used. Among individuals with high social support no significant differences between 5-HTTLPR genotypes regarding all outcome variables were found. However, among those with low social support, carriers of at least one short allele reported significantly increased levels of SOC and resilience, as well as less depressive symptoms than carriers of the l/l genotype. This result was not modified by differentiating between those with childhood abuse and those without. In less supportive social environments the impact of distinct genotypes on behavioral outcomes might be more relevant than in supportive environments where social compensation might take place. Our findings indicate that both alleles of 5-HTTLPR contribute to the adaptability to different environmental conditions.
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Affiliation(s)
- Eva Reinelt
- Department of Clinical Psychology and Psychotherapy, Ruprecht-Karls-University, Heidelberg, Germany
| | - Sven Barnow
- Department of Clinical Psychology and Psychotherapy, Ruprecht-Karls-University, Heidelberg, Germany
| | - Malte Stopsack
- Department of Clinical Psychology and Psychotherapy, Ruprecht-Karls-University, Heidelberg, Germany
| | - Maren Aldinger
- Department of Clinical Psychology and Psychotherapy, Ruprecht-Karls-University, Heidelberg, Germany
| | - Carsten Oliver Schmidt
- Institute of Epidemiology and Social Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Ulrich John
- Institute of Epidemiology and Social Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Hans Jörgen Grabe
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Helios Hospital Stralsund, Stralsund, Germany
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169
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Sales JM, Brown JL, Swartzendruber AL, Smearman EL, Brody GH, DiClemente R. Genetic sensitivity to emotional cues, racial discrimination and depressive symptoms among African-American adolescent females. Front Psychol 2015; 6:854. [PMID: 26157407 PMCID: PMC4476200 DOI: 10.3389/fpsyg.2015.00854] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 06/09/2015] [Indexed: 01/28/2023] Open
Abstract
Psychosocial stress, including stress resulting from racial discrimination (RD), has been associated with elevated depressive symptoms. However, individuals vary in their reactivity to stress, with some variability resulting from genetic differences. Specifically, genetic variation within the linked promoter region of the serotonin transporter gene (5-HTTLPR) is related to heightened reactivity to emotional environmental cues. Likewise, variations within this region may interact with stressful life events (e.g., discrimination) to influence depressive symptoms, but this has not been empirically examined in prior studies. The objective of this study was to examine whether variation in the 5-HTTLPR gene interacts with RD to predict depressive symptoms among a sample of African-American adolescent females. Participants were 304 African-American adolescent females enrolled in a sexually transmitted disease prevention trial. Participants completed a baseline survey assessing psychosocial factors including RD (low vs. high) and depressive symptomatology (low vs. high) and provided a saliva sample for genotyping the risk polymorphism 5-HTTLPR (s allele present vs. not present). In a logistic regression model adjusting for psychosocial correlates of depressive symptoms, an interaction between RD and 5-HTTLPR group was significantly associated with depressive symptomatology (AOR = 3.79, 95% CI: 1.20-11.98, p = 0.02). Follow-up tests found that high RD was significantly associated with greater odds of high depressive symptoms only for participants with the s allele. RD and 5-HTTLPR status interact to differentially impact depressive symptoms among African-American adolescent females. Efforts to decrease depression among minority youth should include interventions which address RD and strengthen factors (e.g., coping, emotion regulation, building support systems) which protect youth from the psychological costs of discrimination.
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Affiliation(s)
- Jessica M. Sales
- Department of Behavioral Sciences and Health Education, Rollins School of Public Health, Emory UniversityAtlanta, GA, USA
| | - Jennifer L. Brown
- Department of Psychological Sciences, Texas Tech UniversityLubbock, TX, USA
| | - Andrea L. Swartzendruber
- Department of Behavioral Sciences and Health Education, Rollins School of Public Health, Emory UniversityAtlanta, GA, USA
| | - Erica L. Smearman
- Department of Behavioral Sciences and Health Education, Rollins School of Public Health, Emory UniversityAtlanta, GA, USA
| | - Gene H. Brody
- Department of Behavioral Sciences and Health Education, Rollins School of Public Health, Emory UniversityAtlanta, GA, USA
| | - Ralph DiClemente
- Department of Behavioral Sciences and Health Education, Rollins School of Public Health, Emory UniversityAtlanta, GA, USA
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170
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Pettitt A. Genetic Variations in the Serotonergic System Mediate a Combined, Weakened Response to SSRI Treatment: A Proposed Model. eNeuro 2015; 2:ENEURO. [PMID: 26464988 DOI: 10.1523/ENEURO.0032-14.2015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Revised: 05/01/2015] [Accepted: 05/06/2015] [Indexed: 12/16/2022] Open
Abstract
Individuals with the short (S) allele in the promoter region of the serotonin transporter gene (5-HTTLPR) show a less favorable response to selective serotonin reuptake inhibitor (SSRI) treatment than individuals with the long (L) allele. Similarly, individuals with the C(-1019)G allele for the mutation found in the promoter region of the serotonin 1A receptor gene (5-HTR1A) have shown blunted responses to SSRI treatment when compared with individuals lacking this polymorphism. While these findings have been replicated across multiple studies, only two studies to date have reported data for a gene-gene interaction associated with response to SSRI treatment. Both of these studies reported a combined effect for these genotypes, with individuals homozygous for the L allele and the C allele (5-HTT(L/L)-1A(C/C)) reporting the most favorable response to SSRI treatment, and individuals homozygous for the S allele and the G allele (5-HTT(S/S)-1A(G/G)) reporting the least favorable response to SSRI treatment. Additionally, no neural mechanisms have been proposed to explain why this gene-gene interaction has been observed. To that end, this article provides a review of the relevant literature associated with these polymorphisms and proposes a feasible model that describes a genotype-dependent modulation of postsynaptic serotonin signaling associated with the 5-HTT and 5-HTR1A genes.
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171
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Tian Y, Liu H, Guse L, Wong TKS, Li J, Bai Y, Jiang X. Association of Genetic Factors and Gene-Environment Interactions With Risk of Developing Posttraumatic Stress Disorder in a Case-Control Study. Biol Res Nurs 2015; 17:364-72. [PMID: 26002549 DOI: 10.1177/1099800415588362] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND The dopamine receptor D2 (DRD2) and serotonin transporter (5-HTT) genes are associated with posttraumatic stress disorder (PTSD). However, it remains largely unknown whether these genes interact with environmental factors to affect the development of PTSD. PURPOSE The purpose of this study was to examine the associations of gene polymorphisms and gene-environment interactions with the risk of developing PTSD among adolescent earthquake survivors. METHOD A total of 183 adolescent survivors from an earthquake-stricken area participated in this study. Measures included a questionnaire about demographic characteristics and earthquake exposure, the PTSD Checklist-Civilian Version and the Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders, fourth edition disorders. Genotypes were analyzed by using the polymerase chain reaction-based restriction fragment length polymorphism. RESULTS The 5-HTTLPR and 5-HTTVNTR polymorphisms and earthquake exposure had statistically significant positive effects on PTSD. The interaction effects of 5-HTTLPR × Earthquake Exposure and 5-HTTVNTR × Earthquake Exposure were statistically significant. CONCLUSION The development of PTSD is the result not only of a genetic effect and environmental factors but also of the interactive effect between gene and environment.
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Affiliation(s)
- Yali Tian
- Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Hui Liu
- West China Second Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Lorna Guse
- Faculty of Nursing, University of Manitoba, Winnipeg, Canada
| | | | - Jiping Li
- West China School of Nursing/West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Yangjing Bai
- Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Xiaolian Jiang
- West China School of Nursing/West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
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172
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Fisher PM, Grady CL, Madsen MK, Strother SC, Knudsen GM. 5-HTTLPR differentially predicts brain network responses to emotional faces. Hum Brain Mapp 2015; 36:2842-51. [PMID: 25929825 DOI: 10.1002/hbm.22811] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 03/16/2015] [Accepted: 04/04/2015] [Indexed: 01/17/2023] Open
Abstract
The effects of the 5-HTTLPR polymorphism on neural responses to emotionally salient faces have been studied extensively, focusing on amygdala reactivity and amygdala-prefrontal interactions. Despite compelling evidence that emotional face paradigms engage a distributed network of brain regions involved in emotion, cognitive and visual processing, less is known about 5-HTTLPR effects on broader network responses. To address this, we evaluated 5-HTTLPR differences in the whole-brain response to an emotional faces paradigm including neutral, angry and fearful faces using functional magnetic resonance imaging in 76 healthy adults. We observed robust increased response to emotional faces in the amygdala, hippocampus, caudate, fusiform gyrus, superior temporal sulcus and lateral prefrontal and occipito-parietal cortices. We observed dissociation between 5-HTTLPR groups such that LA LA individuals had increased response to only angry faces, relative to neutral ones, but S' carriers had increased activity for both angry and fearful faces relative to neutral. Additionally, the response to angry faces was significantly greater in LA LA individuals compared to S' carriers and the response to fearful faces was significantly greater in S' carriers compared to LA LA individuals. These findings provide novel evidence for emotion-specific 5-HTTLPR effects on the response of a distributed set of brain regions including areas responsive to emotionally salient stimuli and critical components of the face-processing network. These findings provide additional insight into neurobiological mechanisms through which 5-HTTLPR genotype may affect personality and related risk for neuropsychiatric illness.
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Affiliation(s)
- Patrick M Fisher
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen O, Denmark.,Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen O, Denmark
| | - Cheryl L Grady
- Rotman Research Institute at Baycrest, University of Toronto, Toronto, Canada.,Department of Psychology and Psychiatry, University of Toronto, Toronto, Canada
| | - Martin K Madsen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen O, Denmark.,Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen O, Denmark
| | - Stephen C Strother
- Rotman Research Institute at Baycrest, University of Toronto, Toronto, Canada.,Department of Medical Physics, University of Toronto, Toronto, Canada
| | - Gitte M Knudsen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen O, Denmark.,Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen O, Denmark
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173
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McHugh SB, Barkus C, Lima J, Glover LR, Sharp T, Bannerman DM. SERT and uncertainty: serotonin transporter expression influences information processing biases for ambiguous aversive cues in mice. Genes Brain Behav 2015; 14:330-6. [PMID: 25824641 PMCID: PMC4440341 DOI: 10.1111/gbb.12215] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 03/26/2015] [Accepted: 03/26/2015] [Indexed: 12/18/2022]
Abstract
The long allele variant of the serotonin transporter (SERT, 5-HTT) gene-linked polymorphic region (5-HTTLPR) is associated with higher levels of 5-HTT expression and reduced risk of developing affective disorders. However, little is known about the mechanisms underlying this protective effect. One hypothesis is that 5-HTT expression influences aversive information processing, with reduced negative cognitive bias present in those with higher 5-HTT expression. Here we investigated this hypothesis using genetically-modified mice and a novel aversive learning paradigm. Mice with high levels of 5-HTT expression (5-HTT over-expressing, 5-HTTOE mice) and wild-type mice were trained to discriminate between three distinct auditory cues: one cue predicted footshock on all trials (CS+); a second cue predicted the absence of footshock (CS−); and a third cue predicted footshock on 20% of trials (CS20%), and was therefore ambiguous. Wild-type mice exhibited equivalently high levels of fear to the CS+ and CS20% and minimal fear to the CS−. In contrast, 5-HTTOE mice exhibited high levels of fear to the CS+ but minimal fear to the CS− and the CS20%. This selective reduction in fear to ambiguous aversive cues suggests that increased 5-HTT expression reduces negative cognitive bias for stimuli with uncertain outcomes.
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Affiliation(s)
- S B McHugh
- Department of Experimental Psychology, University of Oxford, Oxford, UK
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174
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Zhang L, Liu L, Li X, Song Y, Liu J. Serotonin transporter gene polymorphism ( 5-HTTLPR) influences trait anxiety by modulating the functional connectivity between the amygdala and insula in Han Chinese males. Hum Brain Mapp 2015; 36:2732-42. [PMID: 25833281 DOI: 10.1002/hbm.22803] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 12/18/2014] [Accepted: 03/19/2015] [Indexed: 01/30/2023] Open
Abstract
A functional polymorphism (5-hydroxytryptamine transporter linked polymorphic region [5-HTTLPR]) in the promoter region of human serotonin transporter gene has been found to be associated with several dimensions of neuroticism and psychopathology, especially anxiety. However, the neural basis underlying the association between 5-HTTLPR and anxiety is less clear. Here, we explored how 5-HTTLPR influenced anxiety by modulating the spontaneous brain activities in Han Chinese. First, we found an association between 5-HTTLPR and anxiety only in the male and not in the female population, where male S/S homozygotes had a significantly higher level of anxiety than male L allele carriers. Then, we examined how 5-HTTLPR influenced anxiety at both regional and network levels in the brain at rest. At the regional level, we found a significantly higher fractional amplitude of low-frequency fluctuations in the amygdala in male S/S homozygotes relative to male L allele carriers. At the network level, male S/S homozygotes showed a weaker resting-state functional connectivity (RSFC) between the amygdala and various regions, including the insula, Heschl's gyrus, lateral occipital cortex, superior temporal gyrus, and hippocampus, and a stronger RSFC between the amygdala and various regions, including the supramariginal gyrus and middle frontal gyrus. However, at both levels, only was the amygdala-insula RSFC correlated with anxiety. Mediation analyses further revealed that the amygdala-insula RSFC mediated the association between 5-HTTLPR and anxiety. In short, our study provided the first empirical evidence that the amygdala-insula RSFC served as the neural basis underlying the association between 5-HTTLPR and anxiety, suggesting a potential neurogenetic susceptibility mechanism for anxiety.
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Affiliation(s)
- Lin Zhang
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, 100875, China.,Center for Collaboration and Innovation in Brain and Learning Sciences, Beijing Normal University, Beijing, 100875, China
| | - Ling Liu
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, 100875, China.,Center for Collaboration and Innovation in Brain and Learning Sciences, Beijing Normal University, Beijing, 100875, China
| | - Xueting Li
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, 100875, China.,Center for Collaboration and Innovation in Brain and Learning Sciences, Beijing Normal University, Beijing, 100875, China
| | - Yiying Song
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, 100875, China.,Center for Collaboration and Innovation in Brain and Learning Sciences, Beijing Normal University, Beijing, 100875, China
| | - Jia Liu
- Center for Collaboration and Innovation in Brain and Learning Sciences, Beijing Normal University, Beijing, 100875, China.,School of psychology, Beijing Normal University, Beijing, 100875, China
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175
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Schepers R, Markus CR. Gene × cognition interaction on stress-induced eating: effect of rumination. Psychoneuroendocrinology 2015; 54:41-53. [PMID: 25678186 DOI: 10.1016/j.psyneuen.2015.01.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 01/16/2015] [Accepted: 01/18/2015] [Indexed: 01/22/2023]
Abstract
People often crave for high-caloric sweet foods when facing stress and this 'emotional eating' is a most important cause for weight gain and obesity. Eating under stress contrasts with the normally expected response of a loss of appetite, yet in spite of intensive research from neurobiological and cognitive disciplines we still do not know why stress or negative affect triggers overeating in so many of us. Since the prevalence of overweight and obesity still rises, the discovery of crucial risk factors is a most desirable goal of today's research on sub-optimal eating habits. This paper summarizes the most relevant current knowledge from the (human) literature regarding cognitive and biological vulnerabilities for stress-induced emotional eating. A (non-systematic) review of the most relevant studies reveals that most studies contemplate a rather one-directional way of focusing on either cognitive or biological factors, showing inconsistent results. The current paper elaborates and/or integrates these findings into a biological-cognitive interaction model in which a specific combination of genetic and cognitive vulnerabilities are thought to increase our bio-behavioral response to stress, critically increasing the rewarding value of pleasant foods and, hence, emotional eating.
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Affiliation(s)
- Robbie Schepers
- University Maastricht, Faculty of Psychology and Neuroscience, Department of Neuropsychology & Psychopharmacology, Maastricht, The Netherlands
| | - C Rob Markus
- University Maastricht, Faculty of Psychology and Neuroscience, Department of Neuropsychology & Psychopharmacology, Maastricht, The Netherlands.
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176
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Liu J, Mo Y, Ge T, Wang Y, Luo XJ, Feng J, Li M, Su B. Allelic variation at 5-HTTLPR is associated with brain morphology in a Chinese population. Psychiatry Res 2015; 226:399-402. [PMID: 25677398 DOI: 10.1016/j.psychres.2015.01.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 01/19/2015] [Accepted: 01/22/2015] [Indexed: 01/30/2023]
Abstract
Previous studies have reported significant associations of 5-HTTLPR with brain structures mainly in Europeans, but the situations in other ethnic groups remain largely unknown. Here we examined the association of 5-HTTLPR with regional gray matter volume in Han Chinese, and observed significant association in the postcentral gyrus and precuneus cortex.
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Affiliation(s)
- Jiewei Liu
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China; Kunming College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Yin Mo
- Imaging Center, The First Affiliated Hospital of Kunming Medical College, Kunming, Yunnan, China
| | - Tian Ge
- Centre for Computational Systems Biology, School of Mathematical Sciences, Fudan University, Shanghai, China; Department of Computer Science, University of Warwick, Coventry, UK
| | - Yi Wang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Xiong-jian Luo
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan, China
| | - Jianfeng Feng
- Centre for Computational Systems Biology, School of Mathematical Sciences, Fudan University, Shanghai, China; Department of Computer Science, University of Warwick, Coventry, UK
| | - Ming Li
- Lieber Institute for Brain Development, Johns Hopkins University, Baltimore, MD, USA.
| | - Bing Su
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China.
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177
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Lehto K, Vaht M, Mäestu J, Veidebaum T, Harro J. Effect of tryptophan hydroxylase-2 gene polymorphism G-703 T on personality in a population representative sample. Prog Neuropsychopharmacol Biol Psychiatry 2015; 57:31-5. [PMID: 25455586 DOI: 10.1016/j.pnpbp.2014.10.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Accepted: 10/11/2014] [Indexed: 12/17/2022]
Abstract
The tryptophan hydroxylase-2 gene (TPH2) is coding for the key enzyme of serotonin (5-HT) synthesis in the brain and has been associated with a number of psychiatric conditions. A functional variation in the TPH2 gene (G-703T, rs4570625) has been found to affect anxiety-related personality; however, information is very limited regarding the five factor model (FFM) personality traits. We have examined the association of the TPH2 G-703T polymorphism with FFM personality traits, and the possible modulation by the functional variation in the serotonin transporter gene (5-HTTLPR) in a large longitudinal population representative sample. The FFM personality traits were assessed in both birth cohorts of the Estonian Children Personality Behaviour and Health Study at ages 15 (n=742) and 18 (n=834). Significant association of the TPH2 genotype with Neuroticism and Conscientiousness was found at age 15, and with Extraversion and Conscientiousness at age 18. Participants with the T/T genotype scored significantly lower on Neuroticism and higher on Conscientiousness and Extraversion scales. In addition, a gene×gene interaction effect on Conscientiousness was revealed: the TPH2 genotype effect was evident only in the 5-HTTLPR S-allele carriers. These results provide further evidence on the possible role of genetic variations in 5-HT neurotransmission on development of personality traits, and suggest a functional interaction between two key proteins in the 5-HT-ergic system.
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178
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Montirosso R, Provenzi L, Tavian D, Morandi F, Bonanomi A, Missaglia S, Tronick E, Borgatti R. Social stress regulation in 4-month-old infants: contribution of maternal social engagement and infants' 5-HTTLPR genotype. Early Hum Dev 2015; 91:173-9. [PMID: 25676184 DOI: 10.1016/j.earlhumdev.2015.01.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 01/14/2015] [Accepted: 01/21/2015] [Indexed: 11/23/2022]
Abstract
BACKGROUND Maternal behavior and infant 5-HTTLPR polymorphism have been linked to infants' social stress reactivity and recovery at different ages. Nonetheless, Gene×Environment (G×E) studies focusing on early infancy are rare and have led to mixed results. AIM To investigate the contribution of maternal social engagement and infants' 5-HTTLPR polymorphism in predicting infants' negative emotionality in response to a social stressor, namely maternal unresponsiveness. STUDY DESIGN Cross-sectional, G×E study. SUBJECTS 73 4-month-old infants and their mothers took part to the Face-to-Face Still-Face (FFSF) procedure. OUTCOME MEASURES A micro-analytical coding of negative emotionality was adopted to measure infants' reactivity to social stress (Still-Face episode) and infants' recovery after social stress (Reunion episode). Maternal contribution was measured as maternal social engagement during the Play episode. Infants were genotyped as S-carriers or L-homozygotes. RESULTS The interplay between maternal social engagement and infants' genotype was found to be predictive of infants' negative emotionality during both Still-Face and Reunion episodes of the FFSF paradigm. The interaction highlighted that maternal social engagement predicted minor negative emotionality during Still-Face and Reunion episodes for S-carrier infants, but not for L-homozygotes. CONCLUSIONS Findings extend previous results on adults and children, highlighting that maternal behavior might be a protective factor for stress reactivity and regulation, especially for S-carrier infants who are at risk for heightened stress susceptibility.
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179
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Kautto M, Kampman O, Mononen N, Lehtimäki T, Haraldsson S, Koivisto PA, Leinonen E. Serotonin transporter ( 5-HTTLPR) and norepinephrine transporter (NET) gene polymorphisms: susceptibility and treatment response of electroconvulsive therapy in treatment resistant depression. Neurosci Lett 2015; 590:116-20. [PMID: 25650523 DOI: 10.1016/j.neulet.2015.01.077] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 01/23/2015] [Accepted: 01/29/2015] [Indexed: 01/14/2023]
Abstract
Serotonin transporter (5-HTTLPR) and norepinephrine transporter (NET182C) polymorphisms are associated with susceptibility and treatment response in major depressive disorder (MDD). Thus, we examined association between these polymorphisms and susceptibility to treatment resistant depression, and treatment response in severe MDD patients treated with electroconvulsive therapy (ECT). In total, 119 Finnish patients with treatment resistant depression and 395 healthy volunteer blood donors were genotyped. Depression severity was assessed using the Montgomery-Åsberg Depression Scale (MADRS), with MADRS score change during ECT the treatment response indicator. Underrepresentation of the 5-HTTLPR l/l genotype in the NET TT subgroup was observed in patients compared with controls. There were no genotype or allele frequency differences between patients and control groups separately. Patients with combined 5-HTTLPR l/l and NET TT genotypes also had poorer treatment responses than other patients. No differences in ECT response were observed when the polymorphisms were examined separately. Our results suggest that a NET 182C and 5-HTTLPR polymorphism interaction is associated with susceptibility to treatment resistant depression and ECT treatment response in antidepressant resistant depression patients.
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Affiliation(s)
- Mervi Kautto
- University of Tampere, School of Medicine, 33014 Tampere, Finland.
| | - Olli Kampman
- University of Tampere, School of Medicine, 33014 Tampere, Finland; Seinäjoki Hospital District, Department of Psychiatry, Seinäjoki, Finland
| | - Nina Mononen
- Department of Clinical Chemistry, Pirkanmaa Hospital District, Fimlab Laboratories, University of Tampere, School of Medicine, Tampere, Finland
| | - Terho Lehtimäki
- Department of Clinical Chemistry, Pirkanmaa Hospital District, Fimlab Laboratories, University of Tampere, School of Medicine, Tampere, Finland
| | - Susann Haraldsson
- Division of Medical and Clinical Genetics, Department of Medical Biosciences, Umea° University, Umea°, Sweden
| | - Pasi A Koivisto
- Laboratory of Molecular Genetics, Tampere University Hospital, Tampere, Finland
| | - Esa Leinonen
- University of Tampere, School of Medicine, 33014 Tampere, Finland; Tampere University Hospital, Department of Psychiatry, Tampere, Finland
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180
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Kim J, Park A, Glatt SJ, Eckert TL, Vanable PA, Scott-Sheldon LAJ, Carey KB, Ewart CK, Carey MP. Interaction effects between the 5-hydroxy tryptamine transporter-linked polymorphic region ( 5-HTTLPR) genotype and family conflict on adolescent alcohol use and misuse. Addiction 2015; 110:289-99. [PMID: 25294733 DOI: 10.1111/add.12753] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 07/30/2014] [Accepted: 09/29/2014] [Indexed: 12/16/2022]
Abstract
AIMS To investigate whether the effects of family conflict on adolescent drinking differed as a function of 5-hydroxy tryptamine transporter-linked polymorphic region (5-HTTLPR) genotype cross-sectionally and prospectively in two independent samples of adolescents. DESIGN Path analysis and multi-group analysis of two prospective datasets were conducted. SETTINGS United States and United Kingdom. PARTICIPANTS Sample 1 was 175 adolescents in the United States (mean age = 15 at times 1 and 2 with a 6-month interval); Sample 2 was 4916 adolescents in the United Kingdon (mean age = 12 at time 1 and 15 at time 2). MEASUREMENTS In both samples, demographics, tri-allelic 5-HTTLPR genotype and perceived family conflict were assessed at time 1. Alcohol use (frequency of drinking) and alcohol misuse (frequency of intoxication, frequency of drinking three or more drinks, maximum number of drinks) were assessed at times 1 and 2. FINDINGS A significant gene-environment interaction on alcohol misuse at time 1 was found in both sample 1 (β = 0.57, P = 0.001) and sample 2 (β = 0.19, P = 0.01), indicating that the 5-HTTLPR low-activity allele carriers exposed to higher levels of family conflict were more likely to engage in alcohol misuse than non-carriers. A significant gene-environment interaction effect on change in alcohol misuse over time was found only in sample 1 (β = 0.48, P = 0.04) but not in sample 2. CONCLUSIONS Compared with non-carriers, adolescents carrying the 5-HTTLPR low-activity allele are more susceptible to the effects of family conflict on alcohol misuse.
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Affiliation(s)
- Jueun Kim
- Department of Psychology, Syracuse University, Syracuse, NY, USA
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181
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van Dalfsen JH, Markus CR. Interaction between 5-HTTLPR genotype and cognitive stress vulnerability on sleep quality: effects of sub-chronic tryptophan administration. Int J Neuropsychopharmacol 2015; 18:pyu057. [PMID: 25644221 PMCID: PMC4360245 DOI: 10.1093/ijnp/pyu057] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
BACKGROUND Abundant evidence suggests that allelic variation in the serotonin transporter-linked polymorphic region (5-HTTLPR) influences susceptibility to stress and its affective consequences due to brain serotonergic vulnerability. Based on recent assumptions, the present study examined whether the 5-HTTLPR genotype may also interact with a vulnerability to chronic stress experience (conceptualized by trait neuroticism) in order to influence sleep quality and, additionally, whether this is influenced by brain serotonergic manipulations. METHODS In a well-balanced experimental design, homozygous S-allele (n = 57) and L-allele (n = 54) genotypes with high and low chronic stress vulnerability (neuroticism) were first assessed for general past sleep quality during a month before onset of the experiment. Then subjects were assessed for sleep quality following 7 days of tryptophan (3.0g/day) or placebo intake. RESULTS Although high neuroticism was significantly related to a higher frequency of stressful life events and daily hassles, it did not interact with the 5-HTTLPR genotype on general past sleep quality. However, as expected, a 7 day period of tryptophan administration was exclusively associated with better sleep quality scores in the S'/S' genotype with high trait neuroticism. CONCLUSIONS Current findings suggest that 5-HTTLPR does not directly interact with stress vulnerability in order to influence sleep quality. Instead, based on current and previous findings, it is suggested that the S'/S' 5-HTTLPR genotype promotes the risk for stress-related sleep disturbances because of an increased susceptibility to the depressogenic consequences of stress. Accordingly, by way of reducing depressive symptomatology, tryptophan augmentation may particularly improve sleep quality in stress-vulnerable individuals carrying the 5-HTTLPR S-allele.
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Affiliation(s)
- Jens H van Dalfsen
- Department of Neuropsychology and Psychopharmacology, Faculty of Psychology and Neuroscience, Maastricht University
| | - C Rob Markus
- Department of Neuropsychology and Psychopharmacology, Faculty of Psychology and Neuroscience, Maastricht University.
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182
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Mohammadi S, Khazaie H, Rahimi Z, Vaisi-Raygani A, Zargooshi N, Rahimi Z. The serotonin transporter ( 5-HTTLPR) but not serotonin receptor (5-HT2C Cys23Ser) variant is associated with bipolar I disorder in Kurdish population from Western Iran. Neurosci Lett 2015; 590:91-5. [PMID: 25596490 DOI: 10.1016/j.neulet.2015.01.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 12/27/2014] [Accepted: 01/09/2015] [Indexed: 11/28/2022]
Abstract
The role of 5-HTTLPR and 5-HT2C Cys23Ser polymorphisms in the psychopathology of mood disorders and suicide behavior is controversial. The aim of present study was to investigate the association between 5-HTTLPR and 5-HT2C Cys23Ser variants and susceptibility to bipolar I disorder (BID). The 5-HT2C genotypes were studied in 152 patients with BID and 173 gender- and age-matched healthy individuals with Kurds ethnic background from Western Iran using PCR and PCR-RFLP methods. In recessive model (SS vs. LL+LS) the SS genotype was associated with 1.79-fold increased risk of BID (p=0.018). Also, the presence of S allele increased the risk of adult-onset BID by 1.76-fold (p=0.027). No association was detected between 5-HTTLPR genotypes and alleles with suicide attempt. The frequency of 5-HT2C Ser allele in patients and controls were 12.3 and 12.5%, respectively. Mutant allele of HT2C Ser had higher frequency in female (14.7%) than male (10.5%, p=0.27) patients. The frequency of HT2C Ser allele in patients with a family history of BID tended to be higher (15.7%) than those without a family history of the disease (11.8%). The frequency of HT2C Ser allele in suicide attempter women was higher (16.7%) than those without a suicide attempt (14.3%). Our findings demonstrate 5-HTTLPR polymorphism might be a risk factor for BID and adult-onset BID in Kurds population. However, we found the lack of an association between 5-HT2C Cys/Ser variants and the risk of BID.
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Affiliation(s)
- Sahar Mohammadi
- Department of Clinical Biochemistry, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Habibolah Khazaie
- Department of Psychiatry, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Ziba Rahimi
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Asad Vaisi-Raygani
- Department of Clinical Biochemistry, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Newsha Zargooshi
- Department of Biotechnology, University of Kurdistan, Sanandaj, Iran
| | - Zohreh Rahimi
- Department of Clinical Biochemistry, Kermanshah University of Medical Sciences, Kermanshah, Iran; Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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183
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Markus CR, Jonkman LM, Capello A, Leinders S, Hüsch F. Sucrose preload reduces snacking after mild mental stress in healthy participants as a function of 5-hydroxytryptamine transporter gene promoter polymorphism. Stress 2015; 18:149-59. [PMID: 25423193 DOI: 10.3109/10253890.2014.990880] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Brain serotonin (5-hydroxytryptamine, 5-HT) dysfunction is considered to promote food intake and eating-related disturbances, especially under stress or negative mood. Vulnerability for 5-HT disturbances is considered to be genetically determined, including a short (S) allele polymorphism in the serotonin transporter gene (5-HTTLPR) that is associated with lower serotonin function. Since 5-HT function may be slightly increased by carbohydrate consumption, S-allele 5-HTTLPR carriers in particular may benefit from a sugar-preload due to their enhanced 5-HT vulnerability. The aim of the current study was to investigate whether a sugar-containing preload may reduce appetite and energy intake after exposure to stress to induce negative mood, depending on genetic 5-HT vulnerability. From a population of 771 healthy young male and female genotyped college students 31 S/S carriers (8 males, 23 females) and 26 long allele (L/L) carriers (9 males, 17 females) (mean ± S.D. 22 ± 1.6 years; body mass index, BMI, 18-33 kg/m(2)) were monitored for changes in appetite and snacking behavior after stress exposure. Results revealed an increased energy intake after mild mental stress (negative mood) mainly for high-fat sweet foods, which was significantly greater in S/S carriers, and only in these genotypes this intake was significantly reduced by a sucrose-containing preload. Although alternative explanations are possible, it is suggested that S/S participants may have enhanced brain (hypothalamic) 5-HT responsiveness to food that makes them more susceptible to the beneficial satiation effects of a sucrose-preload as well as to the negative effects of mild mental stress on weight gain.
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Affiliation(s)
- C Rob Markus
- Department of Neuropsychology & Psychopharmacology, Faculty of Psychology and Neuroscience and
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Dukal H, Frank J, Lang M, Treutlein J, Gilles M, Wolf IA, Krumm B, Massart R, Szyf M, Laucht M, Deuschle M, Rietschel M, Witt SH. New-born females show higher stress- and genotype-independent methylation of SLC6A4 than males. Borderline Personal Disord Emot Dysregul 2015; 2:8. [PMID: 26401310 PMCID: PMC4579500 DOI: 10.1186/s40479-015-0029-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 03/24/2015] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Research has demonstrated an association between exposure to early life stress and an increased risk of psychiatric disorders in later life, in particular depression. However, the mechanism through which early life stress contributes to disease development remains unclear. Previous studies have reported an association between early life stress and altered methylation of the serotonin transporter gene (SLC6A4), a key candidate gene for several psychiatric disorders. These differences in methylation are influenced by sex and genetic variation in the SLC6A4-linked polymorphic region (5-HTTLPR). Furthermore, one study indicated that stress during pregnancy may induce methylation changes in SLC6A4 in the newborn. The present study is the first to investigate whether early life stress during pregnancy impacts on SLC6A4 methylation in newborns, taking into account the influence of genetic variation and sex. METHODS Cord blood was obtained from newborns with high (n = 45) or low (n = 45) early life stress, defined as maternal stress during pregnancy. The effect on methylation of early life stress, 5-HTTLPR genotype, and sex was assessed at four cytosin-phosphate-guanine dinucleotide (CpG) sites in the promoter associated CpG island north shore (CpG 1 to 4). The epigenetic analyses focused on these CpG sites, since research has shown that CpG island shore methylation has functional consequences. RESULTS Significant sex-specific methylation was observed, with females displaying higher methylation levels than males (p < 0.001). Importantly, this effect was influenced by neither early life stress nor genotype. CONCLUSIONS The present data suggest that sex-specific methylation of SLC6A4 is present at birth, and is independent of early life stress and 5-HTTLPR genotype. This may contribute to the sex-specific prevalence of depression.
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Affiliation(s)
- Helene Dukal
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Josef Frank
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Maren Lang
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Jens Treutlein
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Maria Gilles
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Isabell Ac Wolf
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Bertram Krumm
- Department of Biostatistics, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Renaud Massart
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC Canada
| | - Moshe Szyf
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC Canada
| | - Manfred Laucht
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Michael Deuschle
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Marcella Rietschel
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Stephanie H Witt
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
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Li JJ, Chung TA, Vanyukov MM, Scott Wood D, Ferrell R, Clark DB. A Hierarchical Factor Model of Executive Functions in Adolescents: Evidence of Gene-Environment Interplay. J Int Neuropsychol Soc 2015; 21:62-73. [PMID: 25499600 DOI: 10.1017/S1355617714001039] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Executive functions (EF) are a complex set of neurodevelopmental, higher-ordered processes that are especially salient during adolescence. Disruptions to these processes are predictive of psychiatric problems in later adolescence and adulthood. The objectives of the current study were to characterize the latent structure of EF using bifactor analysis and to investigate the independent and interactive effects of genes and environments on EF during adolescence. Using a representative young adolescent sample, we tested the interaction of a polymorphism in the serotonin transporter gene (5-HTTLPR) and parental supervision for EF through hierarchical linear regression. To account for the possibility of a hierarchical factor structure for EF, a bifactor analysis was conducted on the eight subtests of the Delis-Kaplan Executive Functions System (D-KEFS). The bifactor analysis revealed the presence of a general EF construct and three EF subdomains (i.e., conceptual flexibility, inhibition, and fluency). A significant 5-HTTLPR by parental supervision interaction was found for conceptual flexibility, but not for general EF, fluency or inhibition. Specifically, youth with the L/L genotype had significantly lower conceptual flexibility scores compared to youth with S/S or S/L genotypes given low levels of parental supervision. Our findings indicate that adolescents with the L/L genotype were especially vulnerable to poor parental supervision on EF. This vulnerability may be amenable to preventive interventions.
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Hill SY, Wang S, Carter H, McDermott MD, Zezza N, Stiffler S. Amygdala Volume in Offspring from Multiplex for Alcohol Dependence Families: The Moderating Influence of Childhood Environment and 5-HTTLPR Variation. ACTA ACUST UNITED AC 2015; Suppl 1. [PMID: 25285331 DOI: 10.4172/2329-6488.s1-001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND The increased susceptibility for developing alcohol dependence seen in offspring from families with alcohol dependence may be related to structural and functional differences in brain circuits that influence emotional processing. Early childhood environment, genetic variation in the serotonin transporter-linked polymorphic region (5-HTTLPR) of the SLCA4 gene and allelic variation in the Brain Derived Neurotrophic Factor (BDNF) gene have each been reported to be related to volumetric differences in the temporal lobe especially the amygdala. METHODS Magnetic resonance imaging was used to obtain amygdala volumes for 129 adolescent/young adult individuals who were either High-Risk (HR) offspring from families with multiple cases of alcohol dependence (N=71) or Low-Risk (LR) controls (N=58). Childhood family environment was measured prospectively using age-appropriate versions of the Family Environment Scale during a longitudinal follow-up study. The subjects were genotyped for Brain-Derived Neurotrophic Factor (BDNF) Val66Met and the serotonin transporter polymorphism (5-HTTLPR). Two family environment scale scores (Cohesion and Conflict), genotypic variation, and their interaction were tested for their association with amygdala volumes. Personal and prenatal exposure to alcohol and drugs were considered in statistical analyses in order to more accurately determine the effects of familial risk group differences. RESULTS Amygdala volume was reduced in offspring from families with multiple alcohol dependent members in comparison to offspring from control families. High-Risk offspring who were carriers of the S variant of the 5-HTTLPR polymorphism had reduced amygdala volume in comparison to those with an LL genotype. Larger amygdala volume was associated with greater family cohesion but only in Low-Risk control offspring. CONCLUSIONS Familial risk for alcohol dependence is an important predictor of amygdala volume even when removing cases with significant personal exposure and covarying for prenatal exposure effects. The present study provides new evidence that amygdala volume is modified by 5-HTTLPR variation in High-Risk families.
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Wang SK, Lee YH, Kim JL, Chee IS. No Effect on Body Dissatisfaction of an Interaction between 5-HTTLPR Genotype and Neuroticism in a Young Adult Korean Population. Clin Psychopharmacol Neurosci 2014; 12:229-34. [PMID: 25598828 PMCID: PMC4293170 DOI: 10.9758/cpn.2014.12.3.229] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 11/21/2014] [Accepted: 11/29/2014] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Many studies suggest an association between the serotonin transporter gene-linked polymorphic region (5-HTTLPR) and anxiety-related personality traits (e.g., neuroticism) in healthy subjects. This study investigated the interaction of 5-HTTLPR genotype on body dissatisfaction by neuroticism and to evaluate the interaction of 5-HTTLPR genotype on self-esteem by body dissatisfaction in a young adult Korean population. METHODS Two hundred and eighty three subjects were included in this study. The Eysenck Personality Questionnaire-Korean version was used to evaluate neuroticism, the Body Dysmorphic Disorder Examination-Self Report (BDDE-SR)-Korean version was used to evaluate body dissatisfaction, and the Self-Esteem Scale (SES)-Korean version was used to evaluate self-esteem. The 5-HTTLPR genotype by neuroticism (high : low) interaction was assessed according to the total BDDE-SR score, and 5-HTTLPR genotype by BDDE-SR (high : low) interaction was assessed according to the total SES score. RESULTS The analysis of 5-HTTLPR genotype and neuroticism (high : low) with respect to body dissatisfaction showed no main effects of genotype whereas neuroticism did influence the BDDE-SR score and no interaction of the genotype with neuroticism. The analysis of 5-HTTLPR genotype and BDDE-SR (high : low) with respect to self-esteem score showed no main effects of genotype whereas BDDE-SR did influence the self-esteem score and no interaction of the genotype with body dissatisfaction. CONCLUSION These results suggest that an interaction between 5-HTTPLR genotype and neuroticism does not affect body dissatisfaction and an interaction between 5-HTTPLR genotype and body dissatisfaction does not affect self-esteem in a young adult Korean population.
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Affiliation(s)
- Seung-Keun Wang
- Department of Psychiatry, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea. ; Institute of Brain Research, Chungnam National University, Daejeon, Korea
| | - Young-Ho Lee
- Department of Anatomy, Chungnam National University School of Medicine, Daejeon, Korea. ; Institute of Brain Research, Chungnam National University, Daejeon, Korea
| | - Jeong-Lan Kim
- Department of Psychiatry, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea. ; Institute of Brain Research, Chungnam National University, Daejeon, Korea
| | - Ik-Seung Chee
- Department of Psychiatry, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea. ; Institute of Brain Research, Chungnam National University, Daejeon, Korea
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Agorastos A, Kellner M, Stiedl O, Muhtz C, Wiedemann K, Demiralay C. Blunted autonomic reactivity to pharmacological panic challenge under long-term escitalopram treatment in healthy men. Int J Neuropsychopharmacol 2014; 18:pyu053. [PMID: 25522396 PMCID: PMC4376541 DOI: 10.1093/ijnp/pyu053] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Central serotonergic pathways influence brain areas involved in vagal cardiovascular regulation and, thereby, influence sympathetic efferent activity. Selective serotonin reuptake inhibitors (SSRIs) affect multiple serotonergic pathways, including central autonomic pathways. However, only a few studies have assessed SSRI-mediated effects on autonomic reactivity in healthy individuals using heart rate variability (HRV). METHODS The present study assessed the influence of long-term treatment with escitalopram (ESC) on autonomic reactivity to an intravenous application of 50 µg cholecystokinin tetrapeptide (CCK-4) in 30 healthy young men using a double-blind, placebo (PLA)-controlled, randomized, within-subject cross-over design. Main outcome measures were time- and frequency-domain HRV parameters, assessed at both baseline and immediately after CCK-4 application. RESULTS Results showed substantial effects for the treatment × CCK-4 challenge interaction with respect to heart rate (p < 0.001; pη(2) = 0.499), SDNN (p < 0.001; pη(2) = 576), RMSSD (p = 0.015; pη(2) = 194), NN50% (p = 0.008; pη(2) = 0.224), and LF% (p = 0.014; pη(2) = 0.196), and moderate effects with respect HF% (p = 0.099; pη(2) = 0.094), with PLA subjects showing a higher increase in HR and SDNN and a higher decrease in RMSSD, NN50, LF and HF than subjects in the ESC condition. Thus, ESC treatment significantly blunted the autonomic reactivity to CCK-4. Secondary analysis indicated no effect of the 5-HTTLPR polymorphism on CCK-4-induced autonomic response. CONCLUSIONS Our results support findings suggesting an effect of SSRI treatment on autonomic regulation and provide evidence that ESC treatment is associated with blunted autonomic reactivity in healthy men.
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Affiliation(s)
- Agorastos Agorastos
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Drs Agorastos, Kellner, Muhtz, Wiedemann, and Demiralay); Department of Functional Genomics, Center for Neurogenomics and Cognitive Research, Neuroscience Campus, VU University, Amsterdam, Netherlands (Dr Stiedl); Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Neuroscience Campus, VU University, Amsterdam, Netherlands (Dr Stiedl); Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Dr Muhtz).
| | - Michael Kellner
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Drs Agorastos, Kellner, Muhtz, Wiedemann, and Demiralay); Department of Functional Genomics, Center for Neurogenomics and Cognitive Research, Neuroscience Campus, VU University, Amsterdam, Netherlands (Dr Stiedl); Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Neuroscience Campus, VU University, Amsterdam, Netherlands (Dr Stiedl); Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Dr Muhtz)
| | - Oliver Stiedl
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Drs Agorastos, Kellner, Muhtz, Wiedemann, and Demiralay); Department of Functional Genomics, Center for Neurogenomics and Cognitive Research, Neuroscience Campus, VU University, Amsterdam, Netherlands (Dr Stiedl); Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Neuroscience Campus, VU University, Amsterdam, Netherlands (Dr Stiedl); Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Dr Muhtz)
| | - Christoph Muhtz
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Drs Agorastos, Kellner, Muhtz, Wiedemann, and Demiralay); Department of Functional Genomics, Center for Neurogenomics and Cognitive Research, Neuroscience Campus, VU University, Amsterdam, Netherlands (Dr Stiedl); Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Neuroscience Campus, VU University, Amsterdam, Netherlands (Dr Stiedl); Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Dr Muhtz)
| | - Klaus Wiedemann
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Drs Agorastos, Kellner, Muhtz, Wiedemann, and Demiralay); Department of Functional Genomics, Center for Neurogenomics and Cognitive Research, Neuroscience Campus, VU University, Amsterdam, Netherlands (Dr Stiedl); Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Neuroscience Campus, VU University, Amsterdam, Netherlands (Dr Stiedl); Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Dr Muhtz)
| | - Cüneyt Demiralay
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Drs Agorastos, Kellner, Muhtz, Wiedemann, and Demiralay); Department of Functional Genomics, Center for Neurogenomics and Cognitive Research, Neuroscience Campus, VU University, Amsterdam, Netherlands (Dr Stiedl); Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Neuroscience Campus, VU University, Amsterdam, Netherlands (Dr Stiedl); Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (Dr Muhtz)
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Laursen HR, Siebner HR, Haren T, Madsen K, Grønlund R, Hulme O, Henningsson S. Variation in the oxytocin receptor gene is associated with behavioral and neural correlates of empathic accuracy. Front Behav Neurosci 2014; 8:423. [PMID: 25538588 PMCID: PMC4257152 DOI: 10.3389/fnbeh.2014.00423] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Accepted: 11/18/2014] [Indexed: 01/10/2023] Open
Abstract
The neuromodulators oxytocin and serotonin have been implicated in regulating affective processes underlying empathy. Understanding this dependency, however, has been limited by a lack of objective metrics for measuring empathic performance. Here we employ a novel psychophysical method for measuring empathic performance that quantitatively measures the ability of subjects to decode the experience of another person's pain. In 50 female subjects, we acquired functional magnetic resonance imaging data as they were exposed to a target subject experiencing variable degrees of pain, whilst performing an irrelevant attention-demanding task. We investigated the effect of variation in the oxytocin receptor gene (OXTR) and the serotonin transporter gene (SLC6A4) on the psychophysical and neurometric variability associated with empathic performance. The OXTR rs2268498 and rs53576 polymorphisms, but not the SLC6A4 5-HTTLPR, were associated with significant differences in empathic accuracy, with CC- and AA-carriers, respectively, displaying higher empathic accuracy. For OXTR rs2268498 there was also a genotype difference in the correlation between empathic accuracy and activity in the superior temporal sulcus (STS). In OXTR rs2268498 CC-carriers, high empathic accuracy was associated with stronger responsiveness of the right STS to the observed pain. Together, the results show that genetic variation in the OXTR has significant influence on empathic accuracy and that this may be linked to variable responsivity of the STS.
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Affiliation(s)
- Helle Ruff Laursen
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre Hvidovre, Denmark
| | - Hartwig Roman Siebner
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre Hvidovre, Denmark ; Department of Neurology, Bispebjerg Hospital, University of Copenhagen Copenhagen, Denmark
| | - Tina Haren
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre Hvidovre, Denmark ; Department of Neurorehabilitation TBI Unit, Copenhagen University Hospital Glostrup Glostrup, Denmark
| | - Kristoffer Madsen
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre Hvidovre, Denmark
| | - Rikke Grønlund
- Department of Clinical Biochemistry, Copenhagen University Hospital Hvidovre Hvidovre, Denmark
| | - Oliver Hulme
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre Hvidovre, Denmark
| | - Susanne Henningsson
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre Hvidovre, Denmark ; Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet Copenhagen, Denmark
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190
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Outhred T, Das P, Dobson-Stone C, Felmingham KL, Bryant RA, Nathan PJ, Malhi GS, Kemp AH. The impact of 5-HTTLPR on acute serotonin transporter blockade by escitalopram on emotion processing: preliminary findings from a randomised, crossover fMRI study. Aust N Z J Psychiatry 2014; 48:1115-25. [PMID: 24810870 DOI: 10.1177/0004867414533837] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE Benefit from antidepressant treatment such as selective serotonin reuptake inhibitors (SSRIs) may depend on individual differences in acute effects on neural emotion processing. The short ('S') allele of the serotonin transporter (5-HTT)-linked polymorphic region (5-HTTLPR) is associated with both negative emotion processing biases and poorer treatment outcomes. Therefore, the aim of the present study was to explore the effects of 5-HTTLPR on the impact of the SSRI escitalopram during processing of positive and negative emotional images, as well as neutral stimuli. METHODS The study employed a double-blind, randomised, placebo-controlled crossover design on 36 healthy Caucasian female participants who underwent functional magnetic resonance imaging (fMRI) scanning following placebo or escitalopram treatment, separated by a 7-day washout period. RESULTS Changes in the left amygdala signal with escitalopram treatment during processing of emotional stimuli were linearly related to the 5-HTTLPR 'S' allele load such that the signal to positive stimuli decreased and the signal to negative stimuli increased with an increasing number of low-expressing 'S' alleles. While 5-HTTLPR subgroups were small in size, individual subject changes with treatment and task condition increase confidence in the findings. CONCLUSIONS While preliminary, our findings comprise the first pharmacogenetic study demonstrating an effect of the 5-HTTLPR 'S' allele load on escitalopram-induced changes in amygdala activity during emotional processing, consistent with a 5-HTT expression dosage model. The present findings have implications for the impact of this polymorphism on antidepressant efficacy in patients with mood and anxiety disorders.
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Affiliation(s)
- Tim Outhred
- Discipline of Psychiatry, Sydney Medical School, University of Sydney, Royal North Shore Hospital, St Leonards, Australia SCAN Research and Teaching Unit, School of Psychology, University of Sydney, Sydney, Australia
| | - Pritha Das
- Discipline of Psychiatry, Sydney Medical School, University of Sydney, Royal North Shore Hospital, St Leonards, Australia CADE Clinic, Department of Psychiatry, Royal North Shore Hospital, St Leonards, Australia Advanced Research and Clinical Highfield Imaging (ARCHI), University of Sydney, Royal North Shore Hospital, St Leonards, Australia
| | - Carol Dobson-Stone
- Neuroscience Research Australia, Randwick, Australia School of Medical Sciences, University of New South Wales, Kensington, Australia
| | | | - Richard A Bryant
- School of Psychology, University of New South Wales, Kensington, Australia
| | - Pradeep J Nathan
- Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom School of Psychology and Psychiatry, Monash University, Clayton, Australia
| | - Gin S Malhi
- Discipline of Psychiatry, Sydney Medical School, University of Sydney, Royal North Shore Hospital, St Leonards, Australia CADE Clinic, Department of Psychiatry, Royal North Shore Hospital, St Leonards, Australia Advanced Research and Clinical Highfield Imaging (ARCHI), University of Sydney, Royal North Shore Hospital, St Leonards, Australia
| | - Andrew H Kemp
- Discipline of Psychiatry, Sydney Medical School, University of Sydney, Royal North Shore Hospital, St Leonards, Australia SCAN Research and Teaching Unit, School of Psychology, University of Sydney, Sydney, Australia CADE Clinic, Department of Psychiatry, Royal North Shore Hospital, St Leonards, Australia Advanced Research and Clinical Highfield Imaging (ARCHI), University of Sydney, Royal North Shore Hospital, St Leonards, Australia Hospital Universitário, Universidade de São Paulo, São Paulo, Brazil
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191
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Kimbrel NA, Morissette SB, Meyer EC, Chrestman R, Jamroz R, Silvia PJ, Beckham JC, Young KA. Effect of the 5-HTTLPR polymorphism on posttraumatic stress disorder, depression, anxiety, and quality of life among Iraq and Afghanistan veterans. Anxiety Stress Coping 2014; 28:456-66. [PMID: 25314020 DOI: 10.1080/10615806.2014.973862] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
BACKGROUND AND OBJECTIVES Posttraumatic stress disorder (PTSD), depression, anxiety, and stress are significant problems among returning veterans and are associated with reduced quality of life. DESIGN A correlational design was used to examine the impact of a polymorphism (5-HTTLPR) in the serotonin transporter promoter gene on post-deployment adjustment among returning veterans. METHODS A total of 186 returning Iraq and Afghanistan veterans were genotyped for the 5-HTTLPR polymorphism. Symptoms of PTSD, depression, general stress, and anxiety were assessed along with quality of life. RESULTS After controlling for combat exposure, age, sex of the participant, and race, 5-HTTLPR had a significant multivariate effect on post-deployment adjustment, such that S' carriers reported more post-deployment adjustment problems and worse quality of life than veterans homozygous for the L' allele. This effect was larger when the analyses were restricted to veterans of European ancestry. CONCLUSIONS Our findings suggest that veterans who carry the S' allele of the 5-HTTLPR polymorphism may be at increased risk for adjustment problems and reduced quality of life following deployments to war zones.
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192
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Zhang X, Wang L, Huang F, Li J, Xiong L, Xue H, Zhang Y. Evaluation of the promoter region polymorphism (5- HTTLPR) in the serotonin transporter gene in females with postpartum depression. Exp Ther Med 2014; 9:245-249. [PMID: 25452810 PMCID: PMC4247290 DOI: 10.3892/etm.2014.2043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Accepted: 10/02/2014] [Indexed: 01/20/2023] Open
Abstract
The aim of the present study was to investigate the association between polymorphism in the serotonin transporter (5-HTT) gene-linked polymorphic region (5-HTTLPR) in the promoter region of the 5-HTT gene and the pathogenesis of postpartum depression (PPD). Blood samples were collected from 120 female patients with PPD and 140 age-matched normal controls. Polymerase chain reaction analysis was performed to detect the 5-HTTLPR polymorphism in these subjects, and the genotype and allele frequencies were compared between the two groups. The disease severity was evaluated using the Hamilton Depression Rating Scale (HAMD) score. The results showed that the frequency of the homozygous long/long (L/L) genotype was significantly lower in the PPD group than that in the control group; by contrast, the frequencies of the heterozygous long/short (L/S) and homozygous S/S genotypes were similar for the two groups, without significant differences. No significant differences were observed in the L and S allele frequencies between the two groups. Furthermore, compared with the L/S heterozygous and S/S homozygous genotypes, patients with PPD with the L/L homozygous genotype had a significantly lower HAMD score. The present results suggest that female patients with PPD carrying the homozygous L/L genotype may be less susceptible to depressive symptoms and that the L/L genotype may be associated with the reduced occurrence of PPD. These findings provide a theoretical basis for the clinical diagnosis and treatment of PPD.
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Affiliation(s)
- Xiaoli Zhang
- Department of Obstetrics and Gynecology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Lin Wang
- Department of Histology and Embryology, Medical College of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Fenghua Huang
- Department of Obstetrics and Gynecology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Jiafu Li
- Department of Obstetrics and Gynecology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Li Xiong
- Department of Neurology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Han Xue
- Department of Clinical Laboratory, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Yuanzhen Zhang
- Department of Obstetrics and Gynecology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
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Hernández-Muñoz S, Camarena-Medellin B. [Role of Serotonin Transporter Gene in Eating Disorders]. Rev Colomb Psiquiatr 2014; 43:218-224. [PMID: 26574079 DOI: 10.1016/j.rcp.2014.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 06/13/2014] [Accepted: 08/09/2014] [Indexed: 06/05/2023]
Abstract
BACKGROUND The serotoninergic system has been implicated in mood and appetite regulation, and the serotonin transporter gene (SLC6A4) is a commonly studied candidate gene for eating disorders. However, most studies have focused on a single polymorphism (5-HTTLPR) in SLC6A4. OBJECTIVE We present the studies published on the association between eating disorders (ED) and 5-HTTLPR polymorphism in anorexia nervosa (AN), bulimia nervosa (BN), and eating disorders not otherwise specified (EDNOS). METHOD Search of databases: MEDLINE, ISI, and PubMed for SLC6A4 and ED. CONCLUSIONS From a review of 37 original articles, it was suggested that carriers of S allele is a risk factor for eating disorders, especially for AN. However, BN did not show any association. Also, BMI, impulsivity, anxiety, depression, and age of onset have been associated with S allele in ED patients.
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Affiliation(s)
- Sandra Hernández-Muñoz
- Departamento de Genética Psiquiátrica, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, México, D.F., México
| | - Beatriz Camarena-Medellin
- Departamento de Genética Psiquiátrica, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, México, D.F., México.
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194
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Bastiaansen JA, Servaas MN, Marsman JBC, Ormel J, Nolte IM, Riese H, Aleman A. Filling the gap: relationship between the serotonin-transporter-linked polymorphic region and amygdala activation. Psychol Sci 2014; 25:2058-66. [PMID: 25253281 DOI: 10.1177/0956797614548877] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The alleged association between the serotonin-transporter-linked polymorphic region (5-HTTLPR) and amygdala activation forms a cornerstone of the common view that carrying the short allele of this polymorphism is a potential risk factor for affective disorders. The authors of a recent meta-analysis showed that this association is statistically significant (Hedges's g = 0.35) but warned that estimates might be distorted because of publication bias. Here, we report a replication study of this relationship in 120 participants. We failed to find an association of 5-HTTLPR variation with amygdala activation during a widely used emotional-face-matching paradigm. Moreover, when we conducted a meta-analysis that included unpublished studies and data from the current study, the pooled meta-analytic effect size was no longer significant (g = 0.20, p = .06). These findings cast doubt on previously reported substantial effects, suggesting that the 5-HTTLPR-amygdala association is either much smaller than previously thought, conditional on other factors, or nonexistent.
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Affiliation(s)
- Jojanneke A Bastiaansen
- Interdisciplinary Center Psychopathology and Emotion regulation (ICPE), Department of Psychiatry, University of Groningen, University Medical Center Groningen
| | - Michelle N Servaas
- Neuroimaging Center, Department of Neuroscience, University of Groningen, University Medical Center Groningen
| | - Jan Bernard C Marsman
- Neuroimaging Center, Department of Neuroscience, University of Groningen, University Medical Center Groningen
| | - Johan Ormel
- Interdisciplinary Center Psychopathology and Emotion regulation (ICPE), Department of Psychiatry, University of Groningen, University Medical Center Groningen
| | - Ilja M Nolte
- Department of Epidemiology, University of Groningen, University Medical Center Groningen
| | - Harriëtte Riese
- Interdisciplinary Center Psychopathology and Emotion regulation (ICPE), Department of Psychiatry, University of Groningen, University Medical Center Groningen Department of Epidemiology, University of Groningen, University Medical Center Groningen
| | - André Aleman
- Neuroimaging Center, Department of Neuroscience, University of Groningen, University Medical Center Groningen Department of Psychology, University of Groningen
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195
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Fisher PM, Holst KK, Adamsen D, Klein AB, Frokjaer VG, Jensen PS, Svarer C, Gillings N, Baare WFC, Mikkelsen JD, Knudsen GM. BDNF Val66met and 5-HTTLPR polymorphisms predict a human in vivo marker for brain serotonin levels. Hum Brain Mapp 2014; 36:313-23. [PMID: 25220079 DOI: 10.1002/hbm.22630] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 07/29/2014] [Accepted: 08/29/2014] [Indexed: 11/12/2022] Open
Abstract
Brain-derived neurotrophic factor (BDNF) has been implicated in multiple aspects of brain function including regulation of serotonin signaling. The BDNF val66met polymorphism (rs6265) has been linked to aspects of serotonin signaling in humans but its effects are not well understood. To address this, we evaluated whether BDNF val66met was predictive of a putative marker of brain serotonin levels, serotonin 4 receptor (5-HT4 ) binding assessed with [11C]SB207145 positron emission tomography, which has also been associated with the serotonin-transporter-linked polymorphic region (5-HTTLPR) polymorphism. We applied a linear latent variable model (LVM) using regional 5-HT4 binding values (neocortex, amygdala, caudate, hippocampus, and putamen) from 68 healthy humans, allowing us to explicitly model brain-wide and region-specific genotype effects on 5-HT4 binding. Our data supported an LVM wherein BDNF val66met significantly predicted a LV reflecting [11C]SB207145 binding across regions (P = 0.005). BDNF val66met met-carriers showed 2-9% higher binding relative to val/val homozygotes. In contrast, 5-HTTLPR did not predict the LV but S-carriers showed 7% lower neocortical binding relative to LL homozygotes (P = 7.3 × 10(-6)). We observed no evidence for genetic interaction. Our findings indicate that BDNF val66met significantly predicts a common regulator of brain [11C]SB207145 binding, which we hypothesize reflects brain serotonin levels. In contrast, our data indicate that 5-HTTLPR specifically affects 5-HT4 binding in the neocortex. These findings implicate serotonin signaling as an important molecular mediator underlying the effects of BDNF val66met and 5-HTTLPR on behavior and related risk for neuropsychiatric illness in humans.
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Affiliation(s)
- Patrick M Fisher
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen O, Denmark; Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen O, Denmark
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196
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Cents RAM, Kok R, Tiemeier H, Lucassen N, Székely E, Bakermans-Kranenburg MJ, Hofman A, Jaddoe VWV, van IJzendoorn MH, Verhulst FC, Lambregtse-van den Berg MP. Variations in maternal 5-HTTLPR affect observed sensitive parenting. J Child Psychol Psychiatry 2014; 55:1025-32. [PMID: 24484301 DOI: 10.1111/jcpp.12205] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/28/2013] [Indexed: 12/16/2022]
Abstract
BACKGROUND Little is known about the genetic determinants of sensitive parenting. Two earlier studies examined the effect of the serotonin transporter polymorphism (5-HTTLPR) on sensitive parenting, but reported opposite results. In a large cohort we further examined whether 5-HTTLPR is a predictor of observed maternal sensitivity and whether observed child social fearfulness moderates the effect of 5-HTTLPR on maternal sensitivity. METHODS The population-based cohort consisted of 767 mother-child dyads. Maternal sensitivity was repeatedly observed at the child's age of 14 months, 36 months and 48 months. Sensitivity was coded using the Ainsworth's rating scales for sensitivity and cooperation and the revised Erickson rating scales for Supportive presence and Intrusiveness. Child social fearfulness was observed using the Stranger Approach episode of the Laboratory Temperament Assessment Battery at 36 months. RESULTS Repeated measurement analyses showed a consistent main effect of maternal 5-HTTLPR on sensitivity; mothers carrying the S-allele were more sensitive toward their children (p = .005). This effect was not explained by the child's 5-HTTLPR genotype. We found no evidence that child social fearfulness moderated the effect of 5-HTTLPR on sensitivity. CONCLUSIONS This study suggests that variations in maternal 5-HTTLPR genotype appear to be involved in the etiology of parenting behavior. The observed effects of this genetic variation are consistent with the notion that parenting may have a genetic component, but large studies are needed to find the specific small molecular effects.
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Affiliation(s)
- Rolieke A M Cents
- The Generation R Study Group, Erasmus MC-University Medical Centre, Rotterdam, The Netherlands; Department of Child and Adolescent Psychiatry/Psychology, Erasmus MC-University Medical Centre, Rotterdam, The Netherlands
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197
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Kenna GA, Zywiak WH, Swift RM, McGeary JE, Clifford JS, Shoaff JR, Fricchione S, Brickley M, Beaucage K, Haass-Koffler CL, Leggio L. Ondansetron and sertraline may interact with 5-HTTLPR and DRD4 polymorphisms to reduce drinking in non-treatment seeking alcohol-dependent women: exploratory findings. Alcohol 2014; 48:515-22. [PMID: 25212749 DOI: 10.1016/j.alcohol.2014.04.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 04/23/2014] [Accepted: 04/23/2014] [Indexed: 01/30/2023]
Abstract
The purpose of this exploratory study was to examine the interaction of 5-HTTLPR and DRD4 exon III polymorphisms with gender in non-treatment seeking alcohol-dependent (AD) individuals while alternately taking ondansetron and sertraline. Evidence suggests that alcohol dependence may be influenced by a genetic interaction that may be gender-specific with temporal changes making pharmacological treatment with serotonergic drugs complex. The main trial was a within-subject double-blind placebo-controlled human laboratory study with 77 non-treatment-seeking AD individuals randomized (55 completed, 49 complete data) to receive 200 mg/day of sertraline or 0.5 mg/day of ondansetron for 3 weeks followed by an alcohol self-administration experiment (ASAE), then placebo for 3 weeks followed by a second ASAE, then receive the alternate drug, in a counterbalanced order, for 3 weeks followed by a third ASAE. Results for men were not significant. Women with the LL 5-HTTLPR genotype receiving ondansetron and SS/SL 5-HTTLPR genotype receiving sertraline (matched), drank significantly fewer drinks per drinking day (DDD) during the 7 days prior to the first and third ASAEs than women receiving the mismatched medication (i.e., sertraline to LL and ondansetron to SS/SL). In a 3-way interaction, 5-HTTLPR alleles by DRD4 alleles by medications, women with the LL genotype who received ondansetron and had DRD4≥7 exon III repeats drank significantly fewer DDD as did SS/SL women who received sertraline but conversely had DRD4<7 repeats in the 7-day period leading up to the first and third ASAEs. Consistent with these data was a significant reduction of milliliters consumed ad libitum during these same ASAEs. These exploratory findings add possible support to gender and genetic differences among AD individuals in response to serotonergic pharmacotherapies. Future trials should be powerful enough to take into account that endophenotypes and a targeting of serotonergic interactions may be essential to successfully treat alcohol dependence.
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198
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Waring JD, Etkin A, Hallmayer JF, O'Hara R. Connectivity underlying emotion conflict regulation in older adults with 5-HTTLPR short allele: a preliminary investigation. Am J Geriatr Psychiatry 2014; 22:946-50. [PMID: 24119861 DOI: 10.1016/j.jagp.2013.08.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 08/13/2013] [Accepted: 08/16/2013] [Indexed: 11/24/2022]
Abstract
OBJECTIVE The serotonin transporter polymorphism short (s) allele is associated with heightened emotional reactivity and reduced emotion regulation, which increases vulnerability to depression and anxiety disorders. We investigated behavioral and neural markers of emotion regulation in community-dwelling older adults, contrasting s allele carriers and long allele homozygotes. METHODS Participants (N = 26) completed a face-word emotion conflict task during functional magnetic resonance imaging, in which facilitated regulation of emotion conflict was observed on face-word incongruent trials following another incongruent trial (i.e., emotional conflict adaptation). RESULTS There were no differences between genetic groups in behavioral task performance or neural activation in postincongruent versus postcongruent trials. By contrast, connectivity between dorsal anterior cingulate cortex (ACC) and pregenual ACC, regions previously implicated in emotion conflict regulation, was impaired in s carriers for emotional conflict adaptation. CONCLUSION This is the first demonstration of an association between serotonin transporter polymorphism and functional connectivity in older adults. Poor dorsal ACC-pregenual ACC connectivity in s carriers may be one route by which these individuals experience greater difficulty in implementing effective emotional regulation, which may contribute to their vulnerability for affective disorders.
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199
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Favaro A, Manara R, Pievani M, Clementi M, Forzan M, Bruson A, Tenconi E, Degortes D, Pinato C, Giannunzio V, Battista Frisoni G, Santonastaso P. Neural signatures of the interaction between the 5-HTTLPR genotype and stressful life events in healthy women. Psychiatry Res 2014; 223:157-63. [PMID: 24914006 DOI: 10.1016/j.pscychresns.2014.05.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Revised: 02/24/2014] [Accepted: 05/13/2014] [Indexed: 11/24/2022]
Abstract
A change in neural connectivity of brain structures implicated in the memory of negative life events has been hypothesized to explain the enhancement of memory encoding during the processing of negative stimuli in depressed patients. Here, we investigated the effects of the interaction between negative life events and the 5-HTTLPR genotype - a polymorphism of the serotonin transporter gene - on the functional and structural connectivity of the hippocampal area in 34 healthy women. All participants were genotyped for the presence of the 5-HTTLPR short variant and for the A/G single-nucleotide polymorphism; they underwent clinical assessment including structured diagnostic interviews to exclude the presence of psychiatric disorders and to assess the presence of stressful life events. Resting state functional magnetic resonance imaging and diffusion tensor imaging scans were performed. We found significant interactions between stressful events and the 5-HTTLPR genotype in both the functional connectivity of the parahippocampus with the posterior cingulate cortex and the structural connectivity between the hippocampus and both the amygdala and the putamen. In addition, we found several genotype-related differences in the relationship between functional/structural connectivity of the hippocampal area and the ability to update expectations or stress-related phenotypes, such as anxiety symptoms. If confirmed by future studies, these mechanisms may clarify the role of the 5HTTLPR genotype as a risk factor for depression, in interaction with negative events.
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200
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Fisher PM, Madsen MK, Mc Mahon B, Holst KK, Andersen SB, Laursen HR, Hasholt LF, Siebner HR, Knudsen GM. Three-week bright-light intervention has dose-related effects on threat-related corticolimbic reactivity and functional coupling. Biol Psychiatry 2014; 76:332-9. [PMID: 24439303 DOI: 10.1016/j.biopsych.2013.11.031] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 11/22/2013] [Accepted: 11/30/2013] [Indexed: 12/11/2022]
Abstract
BACKGROUND Bright-light intervention is reported to successfully treat depression, in particular seasonal affective disorder, but the neural pathways and molecular mechanisms mediating its effects are unclear. An amygdala-prefrontal cortex corticolimbic circuit regulates responses to salient environmental stimuli (e.g., threat) and may underlie these effects. Serotonin signaling modulates this circuit and is implicated in the pathophysiology of seasonal and other affective disorders. METHODS We evaluated the effects of a bright-light intervention protocol on threat-related corticolimbic reactivity and functional coupling, assessed with an emotional faces functional magnetic resonance imaging paradigm at preintervention and postintervention. In a double-blind study conducted in the winter, 30 healthy male subjects received bright-light intervention (dose range between participants: .1-11.0 kilolux) for 30 minutes daily over a period of 3 weeks. Additionally, we considered serotonin transporter-linked polymorphic region (5-HTTLPR) genotype status as a model for differences in serotonin signaling and moderator of intervention effects. RESULTS Bright-light dose significantly negatively affected threat-related amygdala and prefrontal reactivity in a dose-dependent manner. Conversely, amygdala-prefrontal and intraprefrontal functional coupling increased significantly in a dose-dependent manner. Genotype status significantly moderated bright-light intervention effects on intraprefrontal functional coupling. CONCLUSIONS This is the first study to evaluate the effects of clinically relevant bright-light intervention on threat-related brain function. We show that amygdala-prefrontal reactivity and communication are significantly affected by bright-light intervention, an effect partly moderated by genotype. These novel findings support that this threat-related corticolimbic circuit is sensitive to light intervention and may mediate the therapeutic effects of bright-light intervention.
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