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https://www.readbyqxmd.com/read/29321705/attention-deficit-hyperactivity-disorder-and-nicotine-dependence-in-adults
#1
Bülent Bilgi, Umut Mert Aksoy, Özge Şahmelikoğlu Onur, Ayşe Fulya Maner
Introduction: The aim of this study is to assess clinical characteristics and smoking profiles of individuals diagnosed with attention-deficit/hyperactivity disorder (ADHD) and compare their nicotine dependence status with healthy controls for better understanding the mutual and complex relationship between ADHD and smoking. Methods: We included the following participants in the study: 40 adults with the diagnosis of ADHD, 40 participants who visited the smoking cessation polyclinic without any psychiatric disorders, and 40 healthy controls...
December 2017: Noro Psikiyatri Arsivi
https://www.readbyqxmd.com/read/29316800/pro-dopamine-regulator-kb220z-attenuates-hoarding-and-shopping-behavior-in-a-female-diagnosed-with-sud-and-adhd
#2
Thomas McLaughlin, Kenneth Blum, Bruce Steinberg, Edward J Modestino, Lyle Fried, David Baron, David Siwicki, Eric R Braverman, Rajendra D Badgaiyan
Background Addictive-like behaviors (e.g., hoarding and shopping) may be the result of the cumulative effects of dopaminergic and other neurotransmitter genetic variants as well as elevated stress levels. We, therefore, propose that dopamine homeostasis may be the preferred goal in combating such challenging and unwanted behaviors, when simple dopaminergic activation through potent agonists may not provide any resolution. Case presentation C.J. is a 38-year-old, single, female, living with her mother. She has a history of substance use disorder as well as attention deficit hyperactivity disorder, inattentive type...
January 10, 2018: Journal of Behavioral Addictions
https://www.readbyqxmd.com/read/29281965/is-dopamine-transporter-mediated-dopaminergic-signaling-in-the-retina-a-noninvasive-biomarker-for-attention-deficit-hyperactivity-disorder-a-study-in-a-novel-dopamine-transporter-variant-val559-transgenic-mouse-model
#3
Heng Dai, Chad R Jackson, Gwynne L Davis, Randy D Blakely, Douglas G McMahon
BACKGROUND: Dopamine (DA) is a critical neuromodulator in the retina. Disruption of retinal DA synthesis and signaling significantly attenuates light-adapted, electroretinogram (ERG) responses, as well as contrast sensitivity and acuity. As these measures can be detected noninvasively, they may provide opportunities to detect disease processes linked to perturbed DA signaling. Recently, we identified a rare, functional DA transporter (DAT, SLC6A3) coding substitution, Ala559Val, in subjects with attention-deficit/hyperactivity disorder (ADHD), demonstrating that DAT Val559 imparts anomalous DA efflux (ADE) with attendant physiological, pharmacological, and behavioral phenotypes...
December 28, 2017: Journal of Neurodevelopmental Disorders
https://www.readbyqxmd.com/read/29261228/overview-of-monoamine-transporters
#4
Shaili Aggarwal, Ole V Mortensen
The dopamine (DAT), serotonin (SERT), and norepinephrine (NET) transporters, which are collectively referred to as monoamine transporters (MATs), play significant roles in regulating the neuronal response to these neurotransmitters. MATs terminate the action of these neurotransmitters by translocating them from the synaptic space into the presynaptic neurons. These three transmitters are responsible for controlling a number of physiological, emotional, and behavioral functions, with their transporters being the site of action of drugs employed for the treatment of a variety of conditions, including depression, anxiety, ADHD, schizophrenia, and psychostimulant abuse...
December 20, 2017: Current Protocols in Pharmacology
https://www.readbyqxmd.com/read/29182037/drd4-exon-3-genotype-and-adhd-randomized-pharmacodynamic-investigation-of-treatment-response-to-methylphenidate
#5
Darya Naumova, Natalie Grizenko, Sarojini M Sengupta, Ridha Joober
OBJECTIVES: Dopamine plays an important role in modulating attention and motor behaviors, dimensions altered in attention deficit/hyperactivity disorder (ADHD). Numerous association studies have linked dopamine receptor 4 (DRD4) to increased risk of ADHD. This study investigated the effect of DRD4 exon 3 polymorphism on child behaviours in response to treatment with methylphenidate (MPH). METHODS: 374 children diagnosed with ADHD (ages 6-12) were evaluated under three experimental conditions: baseline, placebo and MPH (0...
November 28, 2017: World Journal of Biological Psychiatry
https://www.readbyqxmd.com/read/29169998/interaction-between-drd2-and-lead-exposure-on-the-cortical-thickness-of-the-frontal-lobe-in-youth-with-attention-deficit-hyperactivity-disorder
#6
Johanna Inhyang Kim, Jae-Won Kim, Jong-Min Lee, Hyuk Jin Yun, Chul-Ho Sohn, Min-Sup Shin, Bongseog Kim, Jonghee Chae, Jaewoo Roh, Bung-Nyun Kim
BACKGROUND: The dopamine receptor D2 receptor (DRD2) gene and lead exposure are both thought to contribute to the pathophysiology of attention-deficit/hyperactivity disorder (ADHD). ADHD is characterized by delay in brain maturation, most prominent in the prefrontal cortex (PFC). The D2 receptor is also mainly located in the PFC, and animal studies show that lead exposure affects the dopaminergic system of the frontal lobe, indicating an overlap in neural correlates of ADHD, DRD2, and lead exposure...
November 20, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29157002/effects-of-circadian-clock-protein-per1b-on-zebrafish-visual-functions
#7
Ke Nie, Kun Wang, Deng-Feng Huang, Yu-Bin Huang, Wu Yin, Da-Long Ren, Han Wang, Bing Hu
The circadian clock is an endogenous and entrainable time-keeping mechanism with a period of approximately 24 h, operated by transcription/translation feedback loops composed of circadian clock genes and their proteins. The visual system displays robust circadian changes. Relatively little, however, is known about the mechanisms underlying visual circadian rhythmicity. Zebrafish period1b (per1b), as a canonical circadian clock gene, is involved in circadian regulation. Here, we observed that zebrafish per1b mutants exhibit visual defects including reduced behavioral contrast sensitivity and significant retinal dopaminergic deficiency...
November 20, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29116873/the-effect-of-experimental-supplementation-with-the-klamath-algae-extract-klamin-on-attention-deficit-hyperactivity-disorder
#8
Maurizio Cremonte, Davide Sisti, Ilaria Maraucci, Simona Giribone, Evelin Colombo, Marco Bruno Luigi Rocchi, Stefano Scoglio
Attention-deficit/hyperactivity disorder (ADHD) is a chronic neurobiological condition with onset in childhood. The disorder is characterized by inattention, impulsivity, and/or motor hyperactivity, which often affect the development and social integration of affected subjects. Phenylethylamine (PEA), naturally contained in the Klamath Lake microalgae and concentrated in the Klamin® extract, is an endogenous molecule with a general neuromodulatory activity. It functions as an activator for the neurotransmission of dopamine and other catecholamines, and very low concentrations of PEA may be associated with specific psychological disorders such as ADHD...
December 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/29105113/striatal-neurons-get-a-kick-out-of-dopamine
#9
Kenneth Lindegaard Madsen, Jakob Kisbye Dreyer
Dopamine (DA) is critically involved in reinforcement learning and malfunction in dopamine signalling is associated with numerable brain disorders, including ADHD, Parkinson's disease, drug abuse and schizophrenia. This article is protected by copyright. All rights reserved.
November 3, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/29099955/screening-for-adult-adhd-in-patients-with-fibromyalgia-syndrome
#10
Roland van Rensburg, Helgard Pieter Meyer, Sonia Anne Hitchcock, Christian Edward Schuler
Objective: Fibromyalgia syndrome (FMS) is a common chronic pain disorder associated with altered activity of neurotransmitters involved in pain sensitivity such as dopamine, serotonin, and noradrenaline. FMS may significantly impact an individual's functioning due to the presence of chronic pain, fatigue, and cognitive impairment. Dyscognition may be more disabling than the chronic pain but is mostly under-recognized. This study aimed to assess the potential co-occurrence of FMS and adult attention deficit hyperactivity disorder (ADHD), a chronic neurodevelopmental disorder also associated with impaired cognition and dopaminergic function...
November 1, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/29067802/ultrasensitive-and-selective-organic-fet-type-nonenzymatic-dopamine-sensor-based-on-platinum-nanoparticles-decorated-reduced-graphene-oxide
#11
Jungkyun Oh, Jun Seop Lee, Jaemoon Jun, Sung Gun Kim, Jyongsik Jang
Dopamine (DA), a catecholamine hormone, is an important neurotransmitter that controls renal and cardiovascular organizations and regulates physiological activities. Abnormal concentrations of DA cause unfavorable neuronal illnesses such as Parkinson's disease, schizophrenia, and attention deficit hyperactivity disorder/attention deficit disorder. However, the DA concentration is exceedingly low in patients and difficult to detect with existing biosensors. In this study, we developed an organic field-effect-transistor-type (OFET) nonenzyme biosensor using platinum nanoparticle-decorated reduced graphene oxide (Pt_rGO) for ultrasensitive and selective DA detection...
November 2, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29061424/dopamine-transporter-gene-polymorphism-in-children-with-adhd-a-pilot-study-in-indonesian-samples
#12
Tjhin Wiguna, Raden Irawati Ismail, Noorhana Setyawati Winarsih, Fransiska Kaligis, Anggia Hapsari, Lina Budiyanti, Rini Sekartini, Susan Rahayu, Anthony P S Guerrero
INTRODUCTION: Several studies showed that DAT1 polymorphism closed related with ADHD although the results were not consistently found. Studies in China, South Korea, Japan revealed that 10-repeat allele gave a risk for ADHD. Based on that understanding, this study tried to identify whether the similar polymorphism of DAT1 was also apparent in Indonesian children with ADHD. METHOD: This was a case - control study. Case was 50 Indonesian origin children with ADHD and without any other mental disorders and metal retardation...
October 2017: Asian Journal of Psychiatry
https://www.readbyqxmd.com/read/29058689/deficiency-of-tumor-suppressor-ndrg2-leads-to-attention-deficit-and-hyperactive-behavior
#13
Yan Li, Anqi Yin, Xin Sun, Ming Zhang, Jianfang Zhang, Ping Wang, Rougang Xie, Wen Li, Ze Fan, Yuanyuan Zhu, Han Wang, Hailong Dong, Shengxi Wu, Lize Xiong
Attention-deficit/hyperactivity disorder (ADHD) is a prevalent psychiatric disorder in children. Although an imbalance of excitatory and inhibitory inputs has been proposed as contributing to this disorder, the mechanisms underlying this highly heterogeneous disease remain largely unknown. Here, we show that N-myc downstream-regulated gene 2 (NDRG2) deficiency is involved in the development of ADHD in both mice and humans. Ndrg2-knockout (Ndrg2-/-) mice exhibited ADHD-like symptoms characterized by attention deficits, hyperactivity, impulsivity, and impaired memory...
October 23, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29054088/the-interactions-among-organophosphate-pesticide-exposure-oxidative-stress-and-genetic-polymorphisms-of-dopamine-receptor-d4-increase-the-risk-of-attention-deficit-hyperactivity-disorder-in-children
#14
Chia-Huang Chang, Ching-Jung Yu, Jung-Chieh Du, Hsien-Chih Chiou, Hsin-Chang Chen, Winnie Yang, Ming-Yi Chung, Ying-Sheue Chen, Betau Hwang, I-Fang Mao, Mei-Lien Chen
OBJECTIVE: The aim of this study was to clarify the association between organophosphate pesticides (OPs) and attention-deficit/hyperactivity disorder (ADHD) related to oxidative stress and genetic polymorphisms. METHODS: This case-control study enrolled 93 children with ADHD and 112 control children in north Taiwan. Six dialkyl phosphate (DAP) metabolites of OPs and oxidative stress biomarkers were analyzed. Polymorphisms of the dopamine receptor D4 gene (DRD4) were identified...
October 17, 2017: Environmental Research
https://www.readbyqxmd.com/read/29032769/amphetamine-modestly-improves-conners-continuous-performance-test-performance-in-healthy-adults
#15
David A MacQueen, Arpi Minassian, Brook L Henry, Mark A Geyer, Jared W Young, William Perry
OBJECTIVES: Amphetamine improves vigilance as assessed by continuous performance tests (CPT) in children and adults with attention deficit hyperactivity disorder (ADHD). Less is known, however, regarding amphetamine effects on vigilance in healthy adults. Thus, it remains unclear whether amphetamine produces general enhancement of vigilance or if these effects are constrained to the remediation of deficits in patients with ADHD. METHODS: We tested 69 healthy adults (35 female) on a standardized CPT (Conner's CPT-2) after receiving 10- or 20-mg d-amphetamine or placebo...
October 16, 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/29016850/mice-lacking-cyclin-dependent-kinase-like-5-manifest-autistic-and-adhd-like-behaviors
#16
Cian-Ling Jhang, Tzyy-Nan Huang, Yi-Ping Hsueh, Wenlin Liao
Neurodevelopmental disorders frequently share common clinical features and appear high rate of comorbidity, such as those present in patients with attention-deficit hyperactivity disorder (ADHD) and autism spectrum disorders (ASD). While characterizing behavioral phenotypes in the mouse model of cyclin-dependent kinase-like 5 (CDKL5) disorder, a neurodevelopmental disorder caused by mutations in the X-linked gene encoding CDKL5, we found that these mice manifested behavioral phenotypes mimicking multiple key features of ASD, such as impaired social interaction and communication, as well as increased stereotypic digging behaviors...
October 15, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28982350/pilot-study-indicate-role-of-preferentially-transmitted-monoamine-oxidase-gene-variants-in-behavioral-problems-of-male-adhd-probands
#17
Arijit Karmakar, Rishov Goswami, Tanusree Saha, Subhamita Maitra, Anirban Roychowdhury, Chinmay Kumar Panda, Swagata Sinha, Anirban Ray, Kochupurackal P Mohanakumar, Usha Rajamma, Kanchan Mukhopadhyay
BACKGROUND: Attention deficit hyperactivity disorder (ADHD) is an etiologically complex childhood onset neurobehavioral disorder characterized by age-inappropriate inattention, hyperactivity, and impulsivity. Symptom severity varies widely and boys are diagnosed more frequently than girls. ADHD probands were reported to have abnormal transmissions of dopamine, serotonin, and/or noradrenaline. Monoamine oxidase A (MAOA) and B (MAOB), mitochondrial outer membrane bound two isoenzymes, mediate degradation of these neurotransmitters and thus regulating their circulating levels...
October 5, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28964912/functional-coding-variation-in-the-presynaptic-dopamine-transporter-associated-with-neuropsychiatric-disorders-drives-enhanced-motivation-and-context-dependent-impulsivity-in-mice
#18
Gwynne L Davis, Adele Stewart, Gregg D Stanwood, Raajaram Gowrishankar, Maureen K Hahn, Randy D Blakely
Recent genetic analyses have provided evidence that clinical commonalities associated with different psychiatric diagnoses often have shared mechanistic underpinnings. The development of animal models expressing functional genetic variation attributed to multiple disorders offers a salient opportunity to capture molecular, circuit and behavioral alterations underlying this hypothesis. In keeping with studies suggesting dopaminergic contributions to attention-deficit hyperactivity disorder (ADHD), bipolar disorder (BPD) and autism spectrum disorder (ASD), subjects with these diagnoses have been found to express a rare, functional coding substitution in the dopamine (DA) transporter (DAT), Ala559Val...
January 30, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/28948080/interaction-effects-of-git1-and-drd4-gene-variants-on-continuous-performance-test-variables-in-patients-with-adhd
#19
Hyojin Kim, Johanna Inhyang Kim, Haebin Kim, Jae-Won Kim, Bung-Nyun Kim
INTRODUCTION: The G protein-coupled receptor kinase interacting protein 1 gene (GIT1) has been proposed to be a risk gene for attention deficit hyperactivity disorder (ADHD), and it regulates the endocytosis of G protein-coupled receptors like dopamine receptors. The purpose of this study was to investigate the interaction effects of GIT1 and dopamine receptor D4 (DRD4) gene variants on variables of the continuous performance test (CPT). METHODS: This study recruited 255 ADHD patients and 98 healthy controls (HC) who underwent CPT and genetic analyses...
September 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28878639/differential-associations-between-cortical-thickness-and-striatal-dopamine-in-treatment-na%C3%A3-ve-adults-with-adhd-vs-healthy-controls
#20
Mariya V Cherkasova, Nazlie Faridi, Kevin F Casey, Kevin Larcher, Gillian A O'Driscoll, Lily Hechtman, Ridha Joober, Glen B Baker, Jennifer Palmer, Alan C Evans, Alain Dagher, Chawki Benkelfat, Marco Leyton
Alterations in catecholamine signaling and cortical morphology have both been implicated in the pathophysiology of attention deficit/hyperactivity disorder (ADHD). However, possible links between the two remain unstudied. Here, we report exploratory analyses of cortical thickness and its relation to striatal dopamine transmission in treatment-naïve adults with ADHD and matched healthy controls. All participants had one magnetic resonance imaging (MRI) and two [(11)C]raclopride positron emission tomography scans...
2017: Frontiers in Human Neuroscience
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