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https://www.readbyqxmd.com/read/28505190/dynamic-interaction-between-fetal-adversity-and-a-genetic-score-reflecting-dopamine-function-on-developmental-outcomes-at-36-months
#1
Adrianne R Bischoff, Irina Pokhvisneva, Étienne Léger, Hélène Gaudreau, Meir Steiner, James L Kennedy, Kieran J O'Donnell, Josie Diorio, Michael J Meaney, Patrícia P Silveira
BACKGROUND: Fetal adversity, evidenced by poor fetal growth for instance, is associated with increased risk for several diseases later in life. Classical cut-offs to characterize small (SGA) and large for gestational age (LGA) newborns are used to define long term vulnerability. We aimed at exploring the possible dynamism of different birth weight cut-offs in defining vulnerability in developmental outcomes (through the Bayley Scales of Infant and Toddler Development), using the example of a gene vs...
2017: PloS One
https://www.readbyqxmd.com/read/28493018/emerging-role-of-mirna-in-attention-deficit-hyperactivity-disorder-a-systematic-review
#2
REVIEW
Saurabh Srivastav, Susanne Walitza, Edna Grünblatt
Attention deficit hyperactivity disorder (ADHD) is a neuropsychiatric disorder whose aetiology still remains elusive. Nevertheless, evidence supports a high genetic contribution that interacts with environmental factors, also known to modulate epigenetic processes. These epigenetic modulators are a class of non-coding RNAs, microRNAs (miRNAs), known as post-transcriptional regulators, which have emerged as prospective players in neuropsychiatric disorders since they play a role in brain development, synapse formation, and the fine-tuning of genes underlying synaptic and memory formation...
May 10, 2017: Attention Deficit and Hyperactivity Disorders
https://www.readbyqxmd.com/read/28428702/drd4-and-dat1-vntr-genotyping-in-children-with-attention-deficit-hyperactivity-disorder
#3
Ashley Stanley, K Chavda, A Subramanian, S V Prabhu, T F Ashavaid
The dopamine receptor-D4 and the dopamine transporter have been investigated for their role in attention deficit hyperactivity disorder (ADHD) in children. Reports of their genetic association with ADHD have shown mixed results. The aim of the study was to evaluate the association of variable number tandem repeats (VNTRs) of the DRD4 and DAT1 genes with ADHD in children. A pilot 1:1 case control study, with 44 clinically confirmed ADHD cases and 44 age/gender matched healthy controls, was conducted at a tertiary care centre in Mumbai...
June 2017: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/28393838/functional-polymorphisms-in-dopaminergic-genes-modulate-neurobehavioral-and-neurophysiological-consequences-of-sleep-deprivation
#4
Sebastian C Holst, Thomas Müller, Amandine Valomon, Britta Seebauer, Wolfgang Berger, Hans-Peter Landolt
Sleep deprivation impairs cognitive performance and reliably alters brain activation in wakefulness and sleep. Nevertheless, the molecular regulators of prolonged wakefulness remain poorly understood. Evidence from genetic, behavioral, pharmacologic and imaging studies suggest that dopaminergic signaling contributes to the behavioral and electroencephalographic (EEG) consequences of sleep loss, although direct human evidence thereof is missing. We tested whether dopamine neurotransmission regulate sustained attention and evolution of EEG power during prolonged wakefulness...
April 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28376280/independent-and-interactive-effects-of-oprm1-and-dat1-polymorphisms-on-alcohol-consumption-and-subjective-responses-in-social-drinkers
#5
Elise M Weerts, Gary S Wand, Brion Maher, Xiaoqiang Xu, Mary Ann Stephens, Xiaoju Yang, Mary E McCaul
BACKGROUND: The current study examined independent and interactive effects of polymorphisms of the mu opioid receptor gene (OPRM1, A118G) and variable number tandem repeats of the dopamine transporter gene (DAT1, SLC6A3) on alcohol consumption and subjective responses to alcohol in 127 young, healthy, social drinkers. METHODS: Participants completed an in-person assessment, which included self-reported alcohol drinking patterns and blood sampling for DNA, and in a second visit, a cumulative alcohol dosing procedure with subjective ratings across multiple time points and breath alcohol concentrations (0...
April 4, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28337537/is-prepulse-modification-altered-by-continuous-theta-burst-stimulation-dat1-genotype-and-motor-threshold-interact-on-prepulse-modification-following-brain-stimulation
#6
S Notzon, N Vennewald, A Gajewska, A L Klahn, J Diemer, B Winter, I Fohrbeck, V Arolt, P Pauli, K Domschke, P Zwanzger
Previous studies suggest an inhibitory top-down control of the amygdala by the prefrontal cortex (PFC). Both brain regions play a role in the modulation of prepulse modification (PPM) of the acoustic startle response by a pre-stimulus. Repetitive transcranial magnetic stimulation (rTMS) can modulate the activity of the PFC and might thus affect PPM. This study tested the effect of inhibitory rTMS on PPM accounting for a genetic variant of the dopamine transporter gene (DAT1). Healthy participants (N = 102) were stimulated with continuous theta burst stimulation (cTBS, an intense form of inhibitory rTMS) or sham treatment over the right PFC...
March 24, 2017: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/28278565/a-genetic-marker-of-risk-in-hiv-infected-individuals-with-a-history-of-hazardous-drinking
#7
David H Barker, Nicole R Nugent, Jeanne R Delgado, Valerie S Knopik, Larry K Brown, Michelle A Lally, John E McGeary
Impulsivity and sensation seeking have been linked to hazardous drinking, increased sexual risk behaviors, and lower treatment adherence among persons living with HIV (PLH). The dopamine active transporter1 (DAT1or SLC6A3) gene has been linked to impulsivity and sensation seeking in several populations but has not been investigated among populations of PLH. This study used data from 201 PLH who report a recent history of heavy episodic drinking. Results indicate that DAT1*10R vs DAT1*9R genotype was related to higher propensity for risk taking (standardized difference score (d) = 0...
February 21, 2017: AIDS Care
https://www.readbyqxmd.com/read/28264032/interactions-of-adolescent-social-experiences-and-dopamine-genes-to-predict-physical-intimate-partner-violence-perpetration
#8
Laura M Schwab-Reese, Edith A Parker, Corinne Peek-Asa
OBJECTIVES: We examined the interactions between three dopamine gene alleles (DAT1, DRD2, DRD4) previously associated with violent behavior and two components of the adolescent environment (exposure to violence, school social environment) to predict adulthood physical intimate partner violence (IPV) perpetration among white men and women. METHODS: We used data from Wave IV of the National Longitudinal Study of Adolescent to Adult Health, a cohort study following individuals from adolescence to adulthood...
2017: PloS One
https://www.readbyqxmd.com/read/28176268/no-genetic-association-between-attention-deficit-hyperactivity-disorder-adhd-and-parkinson-s-disease-in-nine-adhd-candidate-snps
#9
Julia M Geissler, Marcel Romanos, Manfred Gerlach, Daniela Berg, Claudia Schulte
Attention-deficit/hyperactivity disorder (ADHD) and Parkinson's disease (PD) involve pathological changes in brain structures such as the basal ganglia, which are essential for the control of motor and cognitive behavior and impulsivity. The cause of ADHD and PD remains unknown, but there is increasing evidence that both seem to result from a complicated interplay of genetic and environmental factors affecting numerous cellular processes and brain regions. To explore the possibility of common genetic pathways within the respective pathophysiologies, nine ADHD candidate single nucleotide polymorphisms (SNPs) in seven genes were tested for association with PD in 5333 cases and 12,019 healthy controls: one variant, respectively, in the genes coding for synaptosomal-associated protein 25 k (SNAP25), the dopamine (DA) transporter (SLC6A3; DAT1), DA receptor D4 (DRD4), serotonin receptor 1B (HTR1B), tryptophan hydroxylase 2 (TPH2), the norepinephrine transporter SLC6A2 and three SNPs in cadherin 13 (CDH13)...
February 7, 2017: Attention Deficit and Hyperactivity Disorders
https://www.readbyqxmd.com/read/28163252/the-legacy-pesticide-dieldrin-acts-as-a-teratogen-and-alters-the-expression-of-dopamine-transporter-and-dopamine-receptor-2a-in-zebrafish-danio-rerio-embryos
#10
Kathleena I Sarty, Andrew Cowie, Christopher J Martyniuk
Dieldrin (DLD) is a lipophilic pesticide that shows environmental persistence. The objectives were to determine the effects of DLD on GABAergic and dopaminergic systems in developing zebrafish. Both chorionated and dechorionated embryos (~24h post-hatch) were exposed to a single concentration of DLD (0.347-3470μM) for 48h. Following exposure, a subset of larvae was placed into clean water for 6days (i.e. depuration phase). Chorionated embryos showed <15% mortality while dechorionated embryos showed higher mortality (>30%), suggesting that the chorion protected the embryos...
April 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/28154545/influence-of-the-slc6a3-dat1-gene-on-multifaceted-measures-of-self-regulation-in-preschool-children
#11
Lina M Cómbita, Pascale Voelker, Alicia Abundis-Gutiérrez, Joan P Pozuelos, M Rosario Rueda
Development of self-regulation, the capacity to voluntarily modulate thoughts, emotions and actions is strongly related to the maturation of the dopamine-mediated executive attention network (EAN). The attention control processes associated with the EAN greatly overlap with efficiency of the executive functions and are correlated with measures of effortful control. Regulation of dopamine levels within the EAN, particularly in the basal ganglia is carried out by the action of dopamine transporters. In humans, the SLC6A3/DAT1 gene carries out the synthesis of the DAT protein...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28055236/characterization-of-vntrs-within-the-entire-region-of-slc6a3-and-its-association-with-hypertension
#12
Won-Tae Kim, Se-Ra Lee, Yun-Gil Roh, Seung Il Kim, Yung Hyun Choi, Mi-Hye Mun, Mi-So Jeong, Sang Seok Koh, Sun-Hee Leem
The dopamine transporter SLC6A3 (DAT1) mediates uptake of dopamine into presynaptic terminals. In addition, in previous reports, hypertensive rats were associated with DAT gene, but the genetic association with SLC6A3 and hypertension is still unknown. We examined the distribution of variable number of tandem repeats (VNTRs) and conducted polymorphic analysis of the entire region of SLC6A3. Ten VNTR regions (MS1-10) were revealed throughout the intronic and UTRs; seven VNTR regions were newly isolated and three VNTRs were previously reported...
March 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/27886638/preliminary-evidence-that-negative-symptom-severity-relates-to-multilocus-genetic-profile-for-dopamine-signaling-capacity-and-d2-receptor-binding-in-healthy-controls-and-in-schizophrenia
#13
Sarah A Eisenstein, Ryan Bogdan, Ling Chen, Stephen M Moerlein, Kevin J Black, Joel S Perlmutter, Tamara Hershey, Deanna M Barch
Deficits in central, subcortical dopamine (DA) signaling may underlie negative symptom severity, particularly anhedonia, in healthy individuals and in schizophrenia. To investigate these relationships, we assessed negative symptoms with the Schedule for the Assessment of Negative Symptoms and the Brief Negative Symptom Scale (BNSS) and self-reported anhedonia with the Scales for Physical and Social Anhedonia (SPSA), Temporal Experience of Pleasure Scale, and Snaith-Hamilton Pleasure Scale in 36 healthy controls (HC), 27 siblings (SIB) of individuals with schizophrenia, and 66 individuals with schizophrenia or schizoaffective disorder (SCZ)...
March 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/27873141/the-contribution-of-maternal-adhd-symptomatology-maternal-dat1-and-home-atmosphere-to-child-adhd-symptomatology-at-7%C3%A2-years-of-age
#14
Judith G Auerbach, Yael Zilberman-Hayun, Naama Atzaba-Poria, Andrea Berger
Children of mothers with attention-deficit/hyperactivity disorder (ADHD) have an increased genetic and environmental risk for ADHD. The unique and interactive contributions of a maternal dopamine receptor gene (DAT1), maternal ADHD symptoms (hyperactive- impulsive, inattentive), and home atmosphere to the prediction of ADHD symptoms (hyperactive- impulsive, inattentive) in 7- year-old boys (N = 96) were examined using data from a longitudinal study of familial risk for ADHD. During the first 6 months of the study, mothers and their spouses completed a questionnaire about the mother's ADHD symptoms...
November 21, 2016: Journal of Abnormal Child Psychology
https://www.readbyqxmd.com/read/27799900/vntr-dat1-and-comtval158met-genotypes-modulate-mental-flexibility-and-adaptive-behavior-skills-in-down-syndrome
#15
Laura Del Hoyo, Laura Xicota, Klaus Langohr, Gonzalo Sánchez-Benavides, Susana de Sola, Aida Cuenca-Royo, Joan Rodriguez, Jose Rodríguez-Morató, Magí Farré, Mara Dierssen, Rafael de la Torre
Down syndrome (DS) is an aneuploidy syndrome that is caused by trisomy for human chromosome 21 resulting in a characteristic cognitive and behavioral phenotype, which includes executive functioning and adaptive behavior difficulties possibly due to prefrontal cortex (PFC) deficits. DS also present a high risk for early onset of Alzheimer Disease-like dementia. The dopamine (DA) system plays a neuromodulatory role in the activity of the PFC. Several studies have implicated trait differences in DA signaling on executive functioning based on genetic polymorphisms in the genes encoding for the catechol-O-methyltransferase (COMTVal158Met) and the dopamine transporter (VNTR-DAT1)...
2016: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/27786532/relations-between-three-dopaminergic-system-genes-school-attachment-and-adolescent-delinquency
#16
Adam Fine, Alissa Mahler, Cortney Simmons, Chuansheng Chen, Robert Moyzis, Elizabeth Cauffman
Both environmental factors and genetic variation, particularly in genes responsible for the dopaminergic system such as DRD4, DRD2, and DAT1 (SLC6A3), affect adolescent delinquency. The school context, despite its developmental importance, has been overlooked in gene-environment research. Using data from the National Institute of Child Health and Human Development Study of Early Child Care and Youth Development (NICHD ECCYD), this study examined key interactions between school attachment and (a) each of the DRD4, DRD2, and DAT1 (SLC6A3) genotypes; and (b) a polygenic score...
November 2016: Developmental Psychology
https://www.readbyqxmd.com/read/27752828/erratum-to-further-evidence-for-the-association-between-a-polymorphism-in-the-promoter-region-of-slc6a3-dat1-and-adhd-findings-from-a-sample-of-adults
#17
Lucas A de Azeredo, Diego L Rovaris, Nina R Mota, Evelise R Polina, Francine Z Marques, Verônica Contini, Eduardo S Vitola, Paulo Belmonte-de-Abreu, Luis A Rohde, Eugenio H Grevet, Claiton H D Bau
No abstract text is available yet for this article.
December 2016: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/27676100/dat1-methylation-is-associated-with-methylphenidate-response-on-oppositional-and-hyperactive-impulsive-symptoms-in-children-and-adolescents-with-adhd
#18
Kaijing Ding, Jianzhong Yang, Gavin P Reynolds, Bing Chen, Jingru Shao, Ruixiang Liu, Qiujin Qian, Hua Liu, Runxu Yang, Jianfan Wen, Chuanyuan Kang
OBJECTIVES: To examine the association of the DNA methylation of DAT1 and DRD4 gene with methylphenidate (MPH) response in attention deficit hyperactivity disorder (ADHD). METHODS: One hundred and eleven DSM-IV defined ADHD Chinese Han children were recruited. Inattention, hyperactivity-impulsivity and oppositional symptoms were evaluated by the Swanson, Nolan and Pelham-IV-parent rating scale (SNAP-IV-P) at baseline and 6 weeks after MPH treatment. DNA methylation of CpG sites in the promoter sequences of DAT1 and DRD4 was examined for association with treatment response...
September 27, 2016: World Journal of Biological Psychiatry
https://www.readbyqxmd.com/read/27663943/age-and-drd4-genotype-moderate-associations-between-stimulant-treatment-history-and-cortex-structure-in-attention-deficit-hyperactivity-disorder
#19
Lizanne J S Schweren, Catharina A Hartman, Dirk J Heslenfeld, Annabeth P Groenman, Barbara Franke, Jaap Oosterlaan, Jan K Buitelaar, Pieter J Hoekstra
OBJECTIVE: Attention-deficit/hyperactivity disorder (ADHD) has been associated with dopaminergic imbalance and subtle volume decreases in the brain. Stimulants acutely enhance dopaminergic neurotransmission. Long-term effects of prolonged manipulation of the dopaminergic system on brain structure remain poorly understood; they could be beneficial or unfavorable and could be moderated by common genetic variants and/or age. METHOD: In a large observational ADHD cohort study (N = 316), the effects of cumulative stimulant treatment, genotype (for DAT1 haplotype and DRD4 variants), and treatment-by-genotype interactions on striatal, frontal, and hippocampal volumes and their interactions with age were evaluated...
October 2016: Journal of the American Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/27629597/genetic-moderation-of-intervention-efficacy-dopaminergic-genes-the%C3%A2-incredible-years-and-externalizing-behavior-in-children
#20
Rabia R Chhangur, Joyce Weeland, Geertjan Overbeek, Walter Matthys, Bram Orobio de Castro, Danielle van der Giessen, Jay Belsky
This study investigated whether children scoring higher on a polygenic plasticity index based on five dopaminergic genes (DRD4, DRD2, DAT1, MAOA, and COMT) benefited the most from the Incredible Years (IY) parent program. Data were used from a randomized controlled trial including 341 Dutch families with 4- to 8-year-old children (55.7% boys) showing moderate to high levels of problem behavior. IY proved to be most effective in decreasing parent-reported (but not observed) externalizing behavior in boys (but not girls) carrying more rather than fewer dopaminergic plasticity alleles; this Gene × Intervention effect was most pronounced in the case of boys whose parents' manifested the most positive change in parenting in response to the intervention...
May 2017: Child Development
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