keyword
MENU ▼
Read by QxMD icon Read
search

Adhd dopamine

keyword
https://www.readbyqxmd.com/read/28212944/acute-and-long-term-effects-of-adolescent-methylphenidate-on-decision-making-and-dopamine-receptor-mrna-expression-in-the-orbitofrontal-cortex
#1
Leslie R Amodeo, Eliza Jacobs-Brichford, Matthew S McMurray, Jamie D Roitman
Though commonly used as a treatment for ADHD, the psychostimulant methylphenidate (MPH) is also misused and abused in adolescence in both clinical and general populations. Although MPH acts via pathways activated by other drugs of abuse, the short- and long-term effects of MPH on reward processing in learning and decision-making are not clearly understood. We examined the effect of adolescent MPH treatment on a battery of reward-directed behaviors both in adolescence during its administration and in adulthood after its discontinuation...
February 14, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28176786/disrupted-glutamatergic-transmission-in-prefrontal-cortex-contributes-to-behavioral-abnormality-in-an-animal-model-of-adhd
#2
Jia Cheng, Aiyi Liu, Michael Y Shi, Zhen Yan
Spontaneously hypertensive rats (SHR) are the most widely used animal model for the study of attention deficit hyperactivity disorder (ADHD). Here we sought to reveal the neuronal circuits and molecular basis of ADHD and its potential treatment using SHR. Combined electrophysiological, biochemical, pharmacological, chemicogenetic and behavioral approaches were utilized. We found that AMPAR-mediated synaptic transmission in pyramidal neurons of prefrontal cortex (PFC) was diminished in SHR, which was correlated with the decreased surface expression of AMPAR subunits...
February 8, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28176268/no-genetic-association-between-attention-deficit-hyperactivity-disorder-adhd-and-parkinson-s-disease-in-nine-adhd-candidate-snps
#3
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/28159610/brain-imaging-genetics-in-adhd-and-beyond-mapping-pathways-from-gene-to-disorder-at-different-levels-of-complexity
#4
REVIEW
Marieke Klein, Marten Onnink, Marjolein van Donkelaar, Thomas Wolfers, Benjamin Harich, Yan Shi, Janneke Dammers, Alejandro Arias-Va Squez, Martine Hoogman, Barbara Franke
Attention-deficit/hyperactivity disorder (ADHD) is a common and often persistent neurodevelopmental disorder. Beyond gene-finding, neurobiological parameters, such as brain structure, connectivity, and function, have been used to link genetic variation to ADHD symptomatology. We performed a systematic review of brain imaging genetics studies involving 62 ADHD candidate genes in childhood and adult ADHD cohorts. Fifty-one eligible research articles described studies of 13 ADHD candidate genes. Almost exclusively, single genetic variants were studied, mostly focussing on dopamine-related genes...
January 31, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28154545/influence-of-the-slc6a3-dat1-gene-on-multifaceted-measures-of-self-regulation-in-preschool-children
#5
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/28154152/oral-administration-of-methylphenidate-ritalin-differentially-affects-dopamine-release-between-the-prefrontal-cortex-and-striatum-a-microdialysis-study-in-the-monkey
#6
Tohru Kodama, Takashi Kojima, Yoshiko Honda, Takayuki Hosokawa, Ken-Ichiro Tsutsui, Masataka Watanabe
: Methylphenidate (MPH: Ritalin) is a widely used drug for the treatment of attention deficit hyperactivity disorder (ADHD), and is often used as a cognitive enhancer. Since MPH increases dopamine (DA) release by blocking the DA transporter in the human striatum, MPH is supposed to work on attention and cognition through a DA increase in the striatum. However, ADHD patients show impaired prefrontal cortex (PFC) function, and MPH administration is associated with increased neural activity in the PFC...
February 2, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28142338/toxicity-assessment-of-molindone-hydrochloride-a-dopamine-d2-d5-receptor-antagonist-in-juvenile-and-adult-rats
#7
Gopala Krishna, Gopa Gopalakrishnan, Saryu Goel
Neuroleptic drug molindone hydrochloride is a dopamine D2/D5 receptor antagonist and it is in late stage development for the treatment of impulsive aggression in children and adolescents who have attention deficient/hyperactivity disorder (ADHD). This new indication for this drug would expand the target population to include younger patients, and therefore, toxicity assessments in juvenile animals were undertaken in order to determine susceptibility differences, if any, between this age group and the adult rats...
January 31, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28138806/drd4-variants-moderate-the-impact-of-parental-characteristics-on-child-attention-deficit-hyperactivity-disorder-exploratory-evidence-from-a-multiplex-family-design
#8
Molly A Nikolas, Allison M Momany
Parental ADHD symptomatology and related impairments have been robustly associated with youth ADHD across decades of work. Notably, these factors may impede typical development of child self-regulation capabilities through both neurobiological and interpersonal processes. High heritability of estimates for the disorder further suggest that these effects are likely genetically-mediated, at least in part. Variation within the dopamine D4 receptor gene (DRD4) has been shown to moderate parental influences on youth ADHD...
January 30, 2017: Journal of Abnormal Child Psychology
https://www.readbyqxmd.com/read/28111275/concomitant-behavioral-and-pfc-neuronal-activity-recorded-following-dose-response-protocol-of-mpd-in-adult-male-rats
#9
Sidish S Venkataraman, Catherine Claussen, Michael Joseph, Nachum Dafny
The use of methylphenidate (MPD), a commonly prescribed drug to treat attention-deficit hyperactivity disorder (ADHD), has steadily increased over the past 25 years. This trend has been accompanied by more MPD abuse by ordinary individuals for its cognitive enhancing effects. Therefore, understanding the effects of MPD on the prefrontal cortex (PFC), a brain area involved in higher cortical processing such as executive function, language, planning, and attention regulation, is of particular importance. The goal of this study is to investigate the effects of acute and chronic dose-response characteristics following MPD exposure on both the PFC neuronal population and behavioral activity in freely behaving animals implanted previously with permanent electrodes within the PFC...
January 19, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28110352/effects-of-methylphenidate-on-attention-in-wistar-rats-treated-with-the-neurotoxin-n-2-chloroethyl-n-ethyl-2-bromobenzylamine-dsp4
#10
Joachim Hauser, Andreas Reissmann, Thomas-A Sontag, Oliver Tucha, Klaus W Lange
The aim of this study was to assess the effects of the neurotoxin N-(2-chloroethyl)-N-ethyl-2-bromobenzylamine (DSP4) on attention in rats as measured using the 5-choice-serial-reaction-time task (5CSRTT) and to investigate whether methylphenidate has effects on DSP4-treated rats. Methylphenidate is a noradrenaline and dopamine reuptake inhibitor and commonly used in the pharmacological treatment of individuals with attention deficit/hyperactivity disorder (ADHD). Wistar rats were trained in the 5CSRTT and treated with one of three doses of DSP4 or saline...
January 21, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28097219/key-role-of-the-dopamine-d4-receptor-in-the-modulation-of-corticostriatal-glutamatergic-neurotransmission
#11
Jordi Bonaventura, César Quiroz, Ning-Sheng Cai, Marcelo Rubinstein, Gianluigi Tanda, Sergi Ferré
Polymorphic variants of the dopamine D4 receptor gene (DRD4) have been repeatedly associated with numerous neuropsychiatric disorders. Yet, the functional role of the D4 receptor and the functional differences of the products of DRD4 polymorphic variants remained enigmatic. Immunohistochemical and optogenetic-microdialysis experiments were performed in knock-in mice expressing a D4 receptor with the long intracellular domain of a human DRD4 polymorphic variant associated with attention deficit hyperactivity disorder (ADHD)...
January 2017: Science Advances
https://www.readbyqxmd.com/read/28042822/enduring-sexually-dimorphic-impact-of-in-utero-exposure-to-elevated-levels-of-glucocorticoids-on-midbrain-dopaminergic-populations
#12
REVIEW
Glenda E Gillies, Kanwar Virdee, Ilse Pienaar, Felwah Al-Zaid, Jeffrey W Dalley
Glucocorticoid hormones (GCs) released from the fetal/maternal glands during late gestation are required for normal development of mammalian organs and tissues. Accordingly, synthetic glucocorticoids have proven to be invaluable in perinatal medicine where they are widely used to accelerate fetal lung maturation when there is risk of pre-term birth and to promote infant survival. However, clinical and pre-clinical studies have demonstrated that inappropriate exposure of the developing brain to elevated levels of GCs, either as a result of clinical over-use or after stress-induced activation of the fetal/maternal adrenal cortex, is linked with significant effects on brain structure, neurological function and behaviour in later life...
December 30, 2016: Brain Sciences
https://www.readbyqxmd.com/read/27959462/hj%C3%A3-rnan-ger-f%C3%A3-rdjupad-f%C3%A3-rst%C3%A3-else-f%C3%A3-r-personlighetssyndrom-kan-p%C3%A3-verka-framtida-diagnoss%C3%A3-ttning-och-behandlingar
#13
Predrag Petrovic
Neurobiological aspects of personality disorders and emotional instability ADHD and mental disorders encompassing emotional instability such as emotionally unstable personality disorder and antisocial personality disorder can potentially be explained by a suboptimal regulation of information processing in the brain. ADHD involves suboptimal function of non-emotional attentional regulatory processes and emotional instability involves suboptimal emotional regulation. A network including prefrontal areas, anterior cingulate cortex, basal ganglia and specific neuromodulatory systems such as the dopamine system are dysfunctional in both ADHD and emotional instability...
December 6, 2016: Läkartidningen
https://www.readbyqxmd.com/read/27942455/the-age-dependent-effects-of-a-single-dose-methylphenidate-challenge-on-cerebral-perfusion-in-patients-with-attention-deficit-hyperactivity-disorder
#14
A Schrantee, Hjmm Mutsaerts, C Bouziane, Hgh Tamminga, M A Bottelier, L Reneman
Methylphenidate (MPH) is a stimulant drug and an effective treatment for attention-deficit/hyperactivity disorder (ADHD) in both children and adults. Pre-clinical studies suggest that the response to stimulants is dependent on age, which may reflect the ontogeny of the dopamine (DA) system, which continues to develop throughout childhood and adolescence. Therefore, the aim of this study was to investigate the modulating effect of age on the cerebral blood flow (CBF) response to MPH in stimulant treatment-naive children and adults with ADHD...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/27914615/poor-performance-of-fine-motor-activity-among-biological-parents-of-children-with-attention-deficit-hyperactivity-disorder
#15
Ni Chun Hung, Shih-Hsien Lin, Mei Hung Chi, Chien-Ho Lin, Po See Chen, I Hui Lee, Kao Chin Chen, Yen Kuang Yang
It has been proposed that the dopaminergic system and heritability may play roles in attention deficit/hyperactivity disorder (ADHD). We assessed the performance of healthy parents of children with ADHD in the finger tapping test (FTT) in this study, which is a reliable test and sensitive to central dopamine activity. A total of 16 parents of children with ADHD and 32 controls were enrolled. The FTT was conducted. The 16 healthy parents of children with ADHD exhibited a significantly poorer performance in the FTT, using the nondominant hand, than the 32 healthy controls...
December 2016: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/27910862/methylphenidate-enhances-early-stage-sensory-processing-and-rodent-performance-of-a-visual-signal-detection-task
#16
Rachel L Navarra, Brian D Clark, Andrew T Gargiulo, Barry D Waterhouse
Methylphenidate (MPH) is used clinically to treat attention-deficit/hyperactivity disorder (ADHD) and off-label as a performance enhancing agent in healthy individuals. MPH enhances catecholamine transmission via blockade of norepinephrine (NE) and dopamine (DA) reuptake transporters. However, it is not clear how this action impacts neural circuits performing cognitive and sensorimotor functions driving performance enhancement. The dorsal lateral geniculate nucleus (dLGN) is the primary thalamic relay for visual information from the retina to the cortex and is densely innervated by NE-containing fibers from the locus coeruleus (LC), a pathway known to modulate state-dependent sensory processing...
December 2, 2016: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/27902448/rasgrp1-promotes-amphetamine-induced-motor-behavior-through-a-rhes-interaction-network-rhesactome-in-the-striatum
#17
Neelam Shahani, Supriya Swarnkar, Vincenzo Giovinazzo, Jenny Morgenweck, Laura M Bohn, Catherina Scharager-Tapia, Bruce Pascal, Pablo Martinez-Acedo, Kshitij Khare, Srinivasa Subramaniam
The striatum of the brain coordinates motor function. Dopamine-related drugs may be therapeutic to patients with striatal neurodegeneration, such as Huntington's disease (HD) and Parkinson's disease (PD), but these drugs have unwanted side effects. In addition to stimulating the release of norepinephrine, amphetamines, which are used for narcolepsy and attention-deficit/hyperactivity disorder (ADHD), trigger dopamine release in the striatum. The guanosine triphosphatase Ras homolog enriched in the striatum (Rhes) inhibits dopaminergic signaling in the striatum, is implicated in HD and L-dopa-induced dyskinesia, and has a role in striatal motor control...
November 15, 2016: Science Signaling
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
#18
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/27853928/d1-and-d2-specific-dopamine-antagonist-modulate-the-caudate-nucleus-neuronal-responses-to-chronic-methylphenidate-exposure
#19
Sidish Venkataraman, Catherine Claussen, Nachum Dafny
The psychostimulant, methylphenidate (MPD), is the first line treatment as a pharmacotherapy to treat behavioral disorders such as attention deficit hyperactivity disorder (ADHD). MPD is commonly misused in non-ADHD (normal) youth and young adults both as a recreational drug and for cognitive enhancing effects to improve their grades. MPD is known to act on the reward circuit; including the caudate nucleus (CN). The CN is comprised of medium spiny neurons containing largely dopamine (DA) D1 and D2 receptors...
February 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/27821512/dopamine-d4-receptor-gene-polymorphism-in-a-sample-of-egyptian-children-with-attention-deficit-hyperactivity-disorder-adhd
#20
Farida ElBaz Mohamed, Tarek Mostafa Kamal, Sally Soliman Zahra, Mona Abdel Hakiem Khfagy, Azza Mohamed Youssef
This study aimed to detect DRD4 receptor gene polymorphisms in attention-deficit hyperactivity disorder (ADHD) children and to correlate their phenotype-genotype. Fifty children with ADHD were diagnosed by Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, criteria and were subjected to Conners Parent Rating Scale. All cases and controls were subjected to history taking, physical examination, IQ assessment, and dopamine receptor D4 (DRD4) exon 3 genotyping. The 7-repeat allele was present only in controls, whereas 2-repeat allele was present in the ADHD children (heterozygous 2-repeat allele in 16% and homozygous in 26% of cases)...
November 7, 2016: Journal of Child Neurology
keyword
keyword
114746
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"