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https://www.readbyqxmd.com/read/28529874/shared-and-disorder-specific-task-positive-and-default-mode-network-dysfunctions-during-sustained-attention-in-paediatric-attention-deficit-hyperactivity-disorder-and-obsessive-compulsive-disorder
#1
Luke J Norman, Christina O Carlisi, Anastasia Christakou, Ana Cubillo, Clodagh M Murphy, Kaylita Chantiluke, Andrew Simmons, Vincent Giampietro, Michael Brammer, David Mataix-Cols, Katya Rubia
Patients with Attention-Deficit/Hyperactivity Disorder (ADHD) and obsessive/compulsive disorder (OCD) share problems with sustained attention, and are proposed to share deficits in switching between default mode and task positive networks. The aim of this study was to investigate shared and disorder-specific brain activation abnormalities during sustained attention in the two disorders. Twenty boys with ADHD, 20 boys with OCD and 20 age-matched healthy controls aged between 12 and 18 years completed a functional magnetic resonance imaging (fMRI) version of a parametrically modulated sustained attention task with a progressively increasing sustained attention load...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28528232/a-mathematical-and-biological-plausible-model-of-decision-execution-regulation-in-go-no-go-tasks-focusing-on-the-fronto-striatal-thalamic-pathway
#2
Golnaz Baghdadi, Farzad Towhidkhah, Reza Rostami
Discovering factors influencing the speed and accuracy of responses in tasks such as "Go/No-Go" is one of issues which have been raised in neurocognitive studies. Mathematical models are considered as tools to identify and to study decision making procedure from different aspects. In this paper, a mathematical model has been presented to show several factors can alter the output of decision making procedure before execution in a "Go/No-Go" task. The dynamic of this model has two stable fixed points, each of them corresponds to the "Press" and "Not-press" responses...
May 13, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28526935/diabetes-induced-abnormalities-of-mitochondrial-function-in-rat-brain-cortex-the-effect-of-n-3-fatty-acid-diet
#3
Maria Chomova, Maria Balazova, Jana Muchova
Diabetic encephalopathy, a proven complication of diabetes is associated with gradually developing end-organ damage in the CNS increasing the risk of stroke, cognitive dysfunction or Alzheimer's disease. This study investigated the response of rat cortical mitochondria to streptozotocin-induced diabetes and the potential for fish oil emulsion (FOE) to modulate mitochondrial function. Diabetes-induced deregulation of the respiratory chain function as a result of diminished complex I activity (CI) and cytochrome c oxidase hyperactivity was associated with attenuation of antioxidant defense of isolated cortical mitochondria, monitored by SOD activity, the thiol content, the dityrosine and protein-lipid peroxidation adduct formation...
May 19, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28515562/leukodystrophy-presenting-as-hyperactivity-and-bipolarity-with-uncommon-adverse-drug-reaction
#4
Roshan Sutar, Anirban Ray, Shekhar P Sheshadri
Leukodystrophy is a group of demyelinating neurodegenerative diseases of brain with varied presentation and multiple etiologies. Prognosis is predominantly dismal. Misdiagnosis and wrong treatment are common in this group of rare neurological disorders, especially when it presents with psychiatric symptoms. In this case, importance of neurological and radiological evaluation and need for high diagnostic suspicion in treatment-resistant psychiatric disorders is highlighted.
March 2017: Indian Journal of Psychological Medicine
https://www.readbyqxmd.com/read/28513760/cell-therapy-in-the-treatment-of-bipolar-mania-in-an-animal-model-a-proof-of-concept-study
#5
Bruna M Ascoli, Rafael Colombo, Luiza P Géa, Paula B Terraciano, Sabrina B Pizzato, Fernanda S de Oliveira, Elizabeth Cirne-Lima, Flávio Kapczinski, Adriane R Rosa
Introduction: The rationale of mesenchymal stem cells (MSCs) as a novel therapeutic approach in certain neurodegenerative diseases is based on their ability to promote neurogenesis. Hippocampal atrophy has been related to bipolar disorder (BD) in preclinical, imaging and postmortem studies. Therefore, the development of new strategies to stimulate the neurogenesis process in BD is crucial. Objectives: To investigate the behavioral and neurochemical changes induced by transplantation of MSCs in a model of mania-like behavior induced by lisdexamfetamine dimesylate (LDX)...
May 15, 2017: Trends in Psychiatry and Psychotherapy
https://www.readbyqxmd.com/read/28507595/differential-therapeutic-effects-of-atomoxetine-and-methylphenidate-in-childhood-attention-deficit-hyperactivity-disorder-as-measured-by-near-infrared-spectroscopy
#6
Yoko Nakanishi, Toyosaku Ota, Junzo Iida, Kazuhiko Yamamuro, Naoko Kishimoto, Kosuke Okazaki, Toshifumi Kishimoto
BACKGROUND: The stimulant methylphenidate (MPH) and the nonstimulant atomoxetine (ATX) are the most commonly-prescribed pharmacological treatments for attention deficit/hyperactivity disorder (ADHD). However, the drug-specific mechanism of action on brain function in ADHD patients is not well known. This study examined differences in prefrontal hemodynamic activity between MPH and ATX in children with ADHD as measured by near-infrared spectroscopy (NIRS) using the Stroop color-word task...
2017: Child and Adolescent Psychiatry and Mental Health
https://www.readbyqxmd.com/read/28507320/the-microbiome-regulates-amygdala-dependent-fear-recall
#7
A E Hoban, R M Stilling, G Moloney, F Shanahan, T G Dinan, G Clarke, J F Cryan
The amygdala is a key brain region that is critically involved in the processing and expression of anxiety and fear-related signals. In parallel, a growing number of preclinical and human studies have implicated the microbiome-gut-brain in regulating anxiety and stress-related responses. However, the role of the microbiome in fear-related behaviours is unclear. To this end we investigated the importance of the host microbiome on amygdala-dependent behavioural readouts using the cued fear conditioning paradigm...
May 16, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28507317/elevation-of-p11-in-lateral-habenula-mediates-depression-like-behavior
#8
J-S Seo, P Zhong, A Liu, Z Yan, P Greengard
The lateral habenula (LHb) is a key brain region involved in the pathophysiology of depression. It is activated by stimuli associated with negative experiences and is involved in encoding aversive signals. Hyperactivity of LHb is found in both rodent models of depression and human patients with depression. However, little is known about the underlying molecular mechanisms. Here we show that in LHb neurons, p11, a multifunctional protein implicated in depression, is significantly upregulated by chronic restraint stress...
May 16, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28506353/-effect-of-baicalin-on-atpase-and-ldh-and-its-regulatory-effect-on-the-ac-camp-pka-signaling-pathway-in-rats-with-attention-deficit-hyperactivity-disorder
#9
Rong-Yi Zhou, Jiao-Jiao Wang, Yue You, Ji-Chao Sun, Yu-Chen Song, Hai-Xia Yuan, Xin-Min Han
OBJECTIVE: To study the effect of baicalin on synaptosomal adenosine triphosphatase (ATPase) and lactate dehydrogenase (LDH) and its regulatory effect on the adenylate cyclase (AC)/cyclic adenosine monophosphate (cAMP)/protein kinase A (PKA) signaling pathway in rats with attention deficit hyperactivity disorder (ADHD). METHODS: A total of 40 SHR rats were randomly divided into five groups: ADHD model, methylphenidate hydrochloride treatment (0.07 mg/mL), and low-dose (3...
May 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28502879/genetic-deletion-of-p-glycoprotein-alters-stress-responsivity-and-increases-depression-like-behavior-social-withdrawal-and-microglial-activation-in-the-hippocampus-of-female-mice
#10
Natalia I Brzozowska, Kristie L Smith, Cilla Zhou, Peter M Waters, Ligia Menezes Cavalcante, Sarah V Abelev, Michael Kuligowski, David J Clarke, Stephanie M Todd, Jonathon C Arnold
P-glycoprotein (P-gp) is an ABC transporter expressed at the blood brain barrier and regulates the brain uptake of various xenobiotics and endogenous mediators including glucocorticoid hormones which are critically important to the stress response. Moreover, P-gp is expressed on microglia, the brain's immune cells, which are activated by stressors and have an emerging role in psychiatric disorders. We therefore hypothesised that germline P-gp deletion in mice might alter the behavioral and microglial response to stressors...
May 10, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28498919/chemicogenetic-restoration-of-the-prefrontal-cortex-to-amygdala-pathway-ameliorates-stress-induced-deficits
#11
Jing Wei, Ping Zhong, Luye Qin, Tao Tan, Zhen Yan
Corticosteroid stress hormones exert a profound impact on cognitive and emotional processes. Understanding the neuronal circuits that are altered by chronic stress is important for counteracting the detrimental effects of stress in a brain region- and cell type-specific manner. Using the chemogenetic tool, Designer Receptors Exclusively Activated by Designer Drugs (DREADDs), which enables the remote, noninvasive and long-lasting modulation of cellular activity and signal transduction in discrete neuronal populations in vivo, we sought to identify the specific pathways that play an essential role in stress responses...
May 11, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28497380/from-gene-to-behavior-l-type-calcium-channel-mechanisms-underlying-neuropsychiatric-symptoms
#12
REVIEW
Zeeba D Kabir, Arlene Martínez-Rivera, Anjali M Rajadhyaksha
The L-type calcium channels (LTCCs) Cav1.2 and Cav1.3, encoded by the CACNA1C and CACNA1D genes, respectively, are important regulators of calcium influx into cells and are critical for normal brain development and plasticity. In humans, CACNA1C has emerged as one of the most widely reproduced and prominent candidate risk genes for a range of neuropsychiatric disorders, including bipolar disorder (BD), schizophrenia (SCZ), major depressive disorder, autism spectrum disorder, and attention deficit hyperactivity disorder...
May 11, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/28493605/adverse-effects-of-obesity-on-cognitive-functions-in-individuals-at-ultra-high-risk-for-bipolar-disorder-results-from-the-global-mood-and-brain-science-initiative
#13
Roger S McIntyre, Rodrigo B Mansur, Yena Lee, Letícia Japiassú, Kun Chen, Rui Lu, Weicong Lu, Xiaodong Chen, Ting Li, Guiyun Xu, Kangguang Lin
BACKGROUND: The burden of illness associated with bipolar disorder (BD) warrants early pre-emption/prevention. Prediction models limited to psychiatric phenomenology have insufficient predictive power. Herein, we aimed to evaluate whether the presence of overweight/obesity is associated with greater cognitive decline in individuals at high risk (HR) or ultra high risk (UHR) for BD. METHODS: We conducted a retrospective analysis to investigate the moderational role of body mass index (BMI) on measures of cognitive function...
March 2017: Bipolar Disorders
https://www.readbyqxmd.com/read/28493018/emerging-role-of-mirna-in-attention-deficit-hyperactivity-disorder-a-systematic-review
#14
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/28486878/sleep-and-quality-of-life-in-children-with-traumatic-brain-injury-and-adhd
#15
Ozalp Ekinci, Çetin Okuyaz, Serkan Günes, Nuran Ekinci, Gülhan Örekeci, Halenur Teke, Meltem Çobanoğulları Direk
Objective Attention problems are common in children who sustain a traumatic brain injury (TBI). The differential features of TBI-related Attention Deficit Hyperactivity Disorder (ADHD) and primary ADHD are largely unknown. This study aimed to compare sleep problems and quality of life between children with TBI and ADHD and children with primary ADHD. Methods Twenty children with TBI (mean age = 12.7 ± 3.1 years) who had clinically significant ADHD symptoms according to the structured diagnostic interview and rating scales and a control group with primary ADHD (n = 20) were included...
January 2017: International Journal of Psychiatry in Medicine
https://www.readbyqxmd.com/read/28483244/left-and-right-reaction-time-differences-to-the-sound-intensity-in-normal-and-ad-hd-children
#16
Golnaz Baghdadi, Farzad Towhidkhah, Reza Rostami
OBJECTIVES: Right hemisphere, which is attributed to the sound intensity discrimination, has abnormality in people with attention deficit/hyperactivity disorder (AD/HD). However, it is not studied whether the defect in the right hemisphere has influenced on the intensity sensation of AD/HD subjects or not. In this study, the sensitivity of normal and AD/HD children to the sound intensity was investigated. METHODS: Nineteen normal and fourteen AD/HD children participated in the study and performed a simple auditory reaction time task...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28482185/effect-of-exposure-to-polycyclic-aromatic-hydrocarbons-on-basal-ganglia-and-attention-deficit-hyperactivity-disorder-symptoms-in-primary-school-children
#17
Marion Mortamais, Jesus Pujol, Barend L van Drooge, Didac Macià, Gerard Martínez-Vilavella, Christelle Reynes, Robert Sabatier, Ioar Rivas, Joan Grimalt, Joan Forns, Mar Alvarez-Pedrerol, Xavier Querol, Jordi Sunyer
BACKGROUND: Polycyclic aromatic hydrocarbons (PAHs) have been proposed as environmental risk factors for attention deficit hyperactivity disorder (ADHD). The effects of these pollutants on brain structures potentially involved in the pathophysiology of ADHD are unknown. OBJECTIVE: The aim of this study was to investigate the effects of PAHs on basal ganglia volumes and ADHD symptoms in school children. METHODS: We conducted an imaging study in 242 children aged 8-12years, recruited through a set of representative schools of the city of Barcelona, Spain...
May 5, 2017: Environment International
https://www.readbyqxmd.com/read/28473777/investigating-the-role-of-serotonin-in-methamphetamine-psychosis-unaltered-behavioral-effects-of-chronic-methamphetamine-in-5-ht1a-knockout-mice
#18
Emily J Jaehne, Dzeneta Ameti, Tehani Paiva, Maarten van den Buuse
Methamphetamine (Meth) is a widely abused stimulant drug, but this abuse is associated with an increased risk of developing psychosis. In addition to its well-known action on brain dopamine, Meth also affects serotonergic (5-HT) neurons. The aim of this study was to investigate this role in mice, which lack one of the main serotonin receptors, the 5-HT1A receptor, which has been implicated in both schizophrenia and Meth-induced psychosis. Male and female wild-type or 5-HT1A knockout (KO) mice received daily treatment with increasing doses of methamphetamine from 6 to 9 weeks of age (1-4 mg/kg/day twice a day)...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/28470385/the-metopic-sagittal-craniosynostosis-report-of-35-operative-cases
#19
Takeyoshi Shimoji, Takaoki Kimura, Kazuaki Shimoji, Masakazu Miyajima
PURPOSE: We have diagnosed 35 cases of the supposedly rare condition metopic-sagittal synostosis in the past 20 years. Here, we introduce their clinical symptoms, neuroradiological findings, and surgical treatment methods, as well as discuss the relevant literature. METHODS: Subjects included 35 patients (33 boys and 2 girls; mean age 4.2 years; range 1-8 years). Magnetic resonance imaging (MRI) confirmed that there were no abnormal findings in the brain. Thirty patients presented with symptoms including speech delay, hyperactivity, autistic tendency, motor impairment, self-mutilation, and panic/temper tantrum behaviors...
May 3, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28469556/integrative-analysis-of-brain-region-specific-shank3-interactomes-for-understanding-the-heterogeneity-of-neuronal-pathophysiology-related-to-shank3-mutations
#20
Yeunkum Lee, Hyojin Kang, Bokyoung Lee, Yinhua Zhang, Yoonhee Kim, Shinhyun Kim, Won-Ki Kim, Kihoon Han
Recent molecular genetic studies have identified 100s of risk genes for various neurodevelopmental and neuropsychiatric disorders. As the number of risk genes increases, it is becoming clear that different mutations of a single gene could cause different types of disorders. One of the best examples of such a gene is SHANK3, which encodes a core scaffold protein of the neuronal excitatory post-synapse. Deletions, duplications, and point mutations of SHANK3 are associated with autism spectrum disorders, intellectual disability, schizophrenia, bipolar disorder, and attention deficit hyperactivity disorder...
2017: Frontiers in Molecular Neuroscience
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