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MAOA gene

Tanja Čugura, Jakob Boh, Tomaž Zupanc, Peter Pregelj, Alja Videtič Paska
Dysregulations in serotonin neurotransmission can be a strong contributing factor in suicide and impulsive-aggressive personality traits. Victims of suicide form a heterogeneous group in terms of planning, lethality and number of used methods. In this study, we tested single nucleotide polymorphisms (SNPs) of the monoamine oxidase (MAO) A and B genes on the Slovenian population, which has one of the highest suicide rates in the world. Genotyping was performed on 77 victims of complex suicide, 406 victims of simple suicide and 289 controls...
March 20, 2018: International Journal of Legal Medicine
Maurizio Manca, Veridiana Pessoa, Ana Illera Lopez, Patrick T Harrison, Fabio Miyajima, Helen Sharp, Andrew Pickles, Jonathan Hill, Chris Murgatroyd, Vivien J Bubb, John P Quinn
The monoamine oxidase A (MAOA) uVNTR (upstream variable number tandem repeat) is one of the most often cited examples of a gene by environment interaction (GxE) in relation to behavioral traits. However, MAOA possesses a second VNTR, 500 bp upstream of the uVNTR, which is termed d- or distal VNTR. Furthermore, genomic analysis indicates that there are a minimum of two transcriptional start sites (TSSs) for MAOA, one of which encompasses the uVNTR within the 5' untranslated region of one of the isoforms. Through expression analysis in semi-haploid HAP1 cell lines genetically engineered in order to knockout (KO) either the uVNTR, dVNTR, or both VNTRs, we assessed the effect of the two MAOA VNTRs, either alone or in combination, on gene expression directed from the different TSSs...
March 14, 2018: Journal of Molecular Neuroscience: MN
Katarina Uršič, Tomaž Zupanc, Alja Videtič Paska
Suicide is a well-defined public health problem and is a complex phenomenon influenced by a number of different risk factors, including genetic ones. Numerous studies have examined serotonin system genes. Monoamine oxidase A (MAO-A) is an outer mitochondrial membrane enzyme which is involved in the metabolic pathway of serotonin degradation. Upstream variable number of tandem repeats (uVNTR) in the promoter region of MAOA gene affects the activity of transcription. In the present study we genotyped MAOA-uVNTR polymorphism in 266 suicide victims and 191 control subjects of Slovenian population, which ranks among the European and world populations with the highest suicide rate...
March 2, 2018: Neuroscience Letters
Sebastian Bludau, Thomas W Mühleisen, Simon B Eickhoff, Michael J Hawrylycz, Sven Cichon, Katrin Amunts
Decoding the chain from genes to cognition requires detailed insights how areas with specific gene activities and microanatomical architectures contribute to brain function and dysfunction. The Allen Human Brain Atlas contains regional gene expression data, while the JuBrain Atlas offers three-dimensional cytoarchitectonic maps reflecting interindividual variability. To date, an integrated framework that combines the analytical benefits of both scientific platforms towards a multi-level brain atlas of adult humans was not available...
February 24, 2018: Brain Structure & Function
Amy L Byrd, Stephen B Manuck, Samuel W Hawes, Tayler J Vebares, Vishwajit Nimgaonkar, Kodavali V Chowdari, Alison E Hipwell, Kate Keenan, Stephanie D Stepp
Research consistently demonstrates that common polymorphic variation in monoamine oxidase A (MAOA) moderates the influence of childhood maltreatment on later antisocial behavior, with growing evidence that the "risk" allele (high vs. low activity) differs for females. However, little is known about how this Gene × Environment interaction functions to increase risk, or if this risk pathway is specific to antisocial behavior. Using a prospectively assessed, longitudinal sample of females (n = 2,004), we examined whether changes in emotional reactivity (ER) during adolescence mediated associations between this Gene × Environment and antisocial personality disorder in early adulthood...
February 22, 2018: Development and Psychopathology
Hortensia Ferrero, Patricia Diaz-Gimeno, Patricia Sebastian-Leon, Amparo Faus, Raul Gómez, Antonio Pellicer
Polycystic ovarian syndrome (PCOS) is a common reproductive disorder frequently associated with a substantial risk factor for ovarian hyperstimulation syndrome (OHSS). Dopamine receptor 2 (D2) agonists, like Cabergoline (Cb2), have been used to reduce the OHSS risk. However, lutein granulosa cells (LGCs) from PCOS patients treated with Cb2 still show a deregulated dopaminergic tone (decreased D2 expression and low dopamine production) and increased vascularization compared to non-PCOS LGCs. Therefore, to understand the PCOS ovarian physiology, it is important to explore the mechanisms that underlie syndrome based on the therapeutic effects of Cb2...
February 9, 2018: Reproduction: the Official Journal of the Society for the Study of Fertility
Heledd Hart, Lena Lim, Mitul A Mehta, Charles Curtis, Xiaohui Xu, Gerome Breen, Andrew Simmons, Kah Mirza, Katya Rubia
Childhood maltreatment is associated with error hypersensitivity. We examined the effect of childhood abuse and abuse-by-gene ( 5-HTTLPR, MAOA ) interaction on functional brain connectivity during error processing in medication/drug-free adolescents. Functional connectivity was compared, using generalized psychophysiological interaction (gPPI) analysis of functional magnetic resonance imaging (fMRI) data, between 22 age- and gender-matched medication-naïve and substance abuse-free adolescents exposed to severe childhood abuse and 27 healthy controls, while they performed an individually adjusted tracking stop-signal task, designed to elicit 50% inhibition failures...
2018: Frontiers in Human Neuroscience
Wei Zhang, Li Qian, Maya Deyssenroth, Luca Lambertini, Jackie Finik, Jacob Ham, Yongling Huang, Kenji J Tsuchiya, Patricia Pehme, Jessica Buthmann, Sachiko Yoshida, Jia Chen, Yoko Nomura
Prenatal maternal stress increases the risk for negative developmental outcomes in offspring, however the underlying biological mechanisms remain largely unexplored. In this study, alterations in placental gene expression associated with maternal stress were examined to elucidate potential underlying epi/genetic mechanisms. Expression levels of 40 selected genes involved in regulating fetal HPA-axis and neurodevelopment were profiled in placental tissues collected from a birth cohort established around the time of Superstorm Sandy...
February 9, 2018: Journal of Neuroendocrinology
Xin Men, Jun Ma, Tong Wu, Junyi Pu, Shaojia Wen, Jianfeng Shen, Xun Wang, Yamin Wang, Chao Chen, Penggao Dai
Tamoxifen (TAM) resistance is an important clinical problem in the treatment of breast cancer. In order to identify the mechanism of TAM resistance for estrogen receptor (ER)-positive breast cancer, we screened the transcriptome using RNA-seq and compared the gene expression profiles between the MCF-7 mamma carcinoma cell line and the TAM-resistant cell line TAMR/MCF-7, 52 significant differential expression genes (DEGs) were identified including SLIT2, ROBO, LHX, KLF, VEGFC, BAMBI, LAMA1, FLT4, PNMT, DHRS2, MAOA and ALDH...
January 9, 2018: Oncotarget
Sherif Ramadan, Amira M Nowier, Yusuke Hori, Miho Inoue-Murayama
Temperament traits such as fearfulness are important as they define an animal's responses to its environment and handling. The increasing automation of daily tasks and growing population limits contact between camels and humans. Such limitations contribute to fear of humans and changes in physical environment. Monoamine oxidase A (MAOA) and androgen receptor (AR) genes are important candidates associated with mammal personality. In our analysis, MAOA exon 15 showed no polymorphism but a novel polymorphism was seen in the camel AR exon 1; 16, 17, 18, and 19 glutamine repeats were detected...
2018: PloS One
Bei Jia, Liping Huang, Yaoyu Chen, Siping Liu, Cuihua Chen, Ke Xiong, Lanlin Song, Yulai Zhou, Xinping Yang, Mei Zhong
Contiguous microdeletions of the Norrie disease pseudoglioma (NDP) region on chromosome Xp11.3 have been widely confirmed as contributing to the typical clinical features of Norrie disease (ND). However, the precise relation between genotype and phenotype could vary. The contiguous deletion of NDP and its neighbouring genes, MAOA/B and EFHC2, reportedly leads to syndromic clinical features such as microcephaly, intellectual disability, and epilepsy. Herewe report a novel contiguous microdeletion of the NDP region containing the MAOB and EFHC2 genes,which causes eye defects but no cognitive disability...
December 2017: Journal of Genetics
Heledd Hart, Lena Lim, Mitul A Mehta, Antonia Chatzieffraimidou, Charles Curtis, Xiaohui Xu, Gerome Breen, Andrew Simmons, Kah Mirza, Katya Rubia
Childhood maltreatment is associated with attention deficits. We examined the effect of childhood abuse and abuse-by-gene (5-HTTLPR, MAOA, FKBP5) interaction on functional brain connectivity during sustained attention in medication/drug-free adolescents. Functional connectivity was compared, using generalised psychophysiological interaction (gPPI) analysis of functional magnetic resonance imaging (fMRI) data, between 21 age-and gender-matched adolescents exposed to severe childhood abuse and 27 healthy controls, while they performed a parametrically modulated vigilance task requiring target detection with a progressively increasing load of sustained attention...
2017: PloS One
Christiane Ziegler, Christiane Wolf, Miriam A Schiele, Elma Feric Bojic, Sabina Kucukalic, Emina Sabic Dzananovic, Aferdita Goci Uka, Blerina Hoxha, Valdete Haxhibeqiri, Shpend Haxhibeqiri, Nermina Kravic, Mirnesa Muminovic Umihanic, Ana Cima Franc, Nenad Jaksic, Romana Babic, Marko Pavlovic, Bodo Warrings, Alma Bravo Mehmedbasic, Dusko Rudan, Branka Aukst-Margetic, Abdulah Kucukalic, Damir Marjanovic, Dragan Babic, Nada Bozina, Miro Jakovljevic, Osman Sinanovic, Esmina Avdibegovic, Ferid Agani, Alma Dzubur-Kulenovic, Jürgen Deckert, Katharina Domschke
Background: Posttraumatic Stress Disorder (PTSD) is characterized by an overactive noradrenergic system conferring core PTSD symptoms such as hyperarousal and re-experiencing. Monoamine oxidase A (MAO-A) is one of the key enzymes mediating the turnover of noradrenaline. Here, DNA methylation of the MAOA gene exonI/intronI region was investigated for the first time in regards to its role in PTSD risk and severity. Methods: MAOA methylation was analyzed via direct sequencing of sodium bisulfite treated DNA extracted from blood cells in a total sample of N=652 (m=441) patients with current PTSD, patients with remitted PTSD and healthy probands (comparison group) recruited at five centres in Bosnia-Herzegovina, Croatia, and the Republic of Kosovo...
November 23, 2017: International Journal of Neuropsychopharmacology
Bernt Popp, Arif B Ekici, Christian T Thiel, Juliane Hoyer, Antje Wiesener, Cornelia Kraus, André Reis, Christiane Zweier
High throughput sequencing has greatly advanced disease gene identification, especially in heterogeneous entities. Despite falling costs this is still an expensive and laborious technique, particularly when studying large cohorts. To address this problem we applied Exome Pool-Seq as an economic and fast screening technology in neurodevelopmental disorders (NDDs). Sequencing of 96 individuals can be performed in eight pools of 12 samples on less than one Illumina sequencer lane. In a pilot study with 96 cases we identified 27 variants, likely or possibly affecting function...
November 20, 2017: European Journal of Human Genetics: EJHG
Denise J VAN DER Mee, Iryna O Fedko, Jouke-Jan Hottenga, Erik A Ehli, Matthijs D VAN DER Zee, Lannie Ligthart, Toos C E M VAN Beijsterveldt, Gareth E Davies, Meike Bartels, Joseph G Landers, Eco J C DE Geus
PURPOSE: Most candidate gene studies on the neurobiology of voluntary exercise behavior have focused on the dopaminergic signaling pathway and its role in the mesolimbic reward system. We hypothesized that dopaminergic candidate genes may influence exercise behavior through additional effects on executive functioning and that these effects are only detected when the types of exercise activity are taken into account. METHODS: Data on voluntary exercise behavior and at least one single-nucleotide polymorphism/variable number of tandem repeat (VNTR) were available for 12,929 participants of the Netherlands Twin Registry...
April 2018: Medicine and Science in Sports and Exercise
Katherine McEvoy, Lauren M Osborne, Julie Nanavati, Jennifer L Payne
PURPOSE OF REVIEW: The purpose of this study is to review and summarize the literature exploring the genetic basis for premenstrual dysphoric disorder (PMDD) and postpartum depression (PPD). RECENT FINDINGS: There is more evidence for a genetic basis for PPD than for PMDD, but only when PPD is defined as beginning in the immediate postpartum time period. Familial, genome-wide linkage and association studies, and candidate gene studies, most in the past 10 years, have examined the genetic etiology of reproductive affective disorders, including PMDD and PPD...
October 30, 2017: Current Psychiatry Reports
Man K Xu, Darya Gaysina, Roula Tsonaka, Alexandre J S Morin, Tim J Croudace, Jennifer H Barnett, Jeanine Houwing-Duistermaat, Marcus Richards, Peter B Jones
Very few molecular genetic studies of personality traits have used longitudinal phenotypic data, therefore molecular basis for developmental change and stability of personality remains to be explored. We examined the role of the monoamine oxidase A gene (MAOA) on extraversion and neuroticism from adolescence to adulthood, using modern latent variable methods. A sample of 1,160 male and 1,180 female participants with complete genotyping data was drawn from a British national birth cohort, the MRC National Survey of Health and Development (NSHD)...
2017: Frontiers in Psychology
Nathan J Kolla, Jeffrey Meyer, Marcos Sanches, James Charbonneau
Objective: Impulsivity is a core feature of borderline personality disorder (BPD) and antisocial personality disorder (ASPD) that likely arises from combined genetic and environmental influences. The interaction of the low activity variant of the monoamine oxidase-A (MAOA-L) gene and early childhood adversity has been shown to predict aggression in clinical and non-clinical populations. Although impulsivity is a risk factor for aggression in BPD and ASPD, little research has investigated potential gene-environment (G×E) influences impacting its expression in these conditions...
November 30, 2017: Clinical Psychopharmacology and Neuroscience: the Official Scientific Journal of the Korean College of Neuropsychopharmacology
Azmeraw T Amare, Klaus Oliver Schubert, Bernhard T Baune
Personalized medicine (personalized psychiatry in a specific setting) is a new model towards individualized care, in which knowledge from genomics and other omic pillars (microbiome, epigenomes, proteome, and metabolome) will be combined with clinical data to guide efforts to new drug development and targeted prescription of the existing treatment options. In this review, we summarize pharmacogenomic studies in mood disorders that may lay the foundation towards personalized psychiatry. In addition, we have discussed the possible strategies to integrate data from omic pillars as a future path to personalized psychiatry...
September 2017: EPMA Journal
Martin Klasen, Dhana Wolf, Patrick D Eisner, Ute Habel, Jonathan Repple, Ingo Vernaleken, Thorben Schlüter, Thomas Eggermann, Klaus Zerres, Florian D Zepf, Klaus Mathiak
Low expressing alleles of the MAOA gene (MAOA-L) have been associated with an increased risk for developing an aggressive personality. This suggests an MAOA-L-specific neurobiological vulnerability associated with trait aggression. The neural networks underlying this vulnerability are unknown. The present study investigated genotype-specific associations between resting state brain networks and trait aggression (Buss-Perry Aggression Questionnaire) in 82 healthy Caucasian males. Genotype influences on aggression-related networks were studied for intrinsic and seed-based brain connectivity...
October 10, 2017: Brain Structure & Function
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