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https://www.readbyqxmd.com/read/29523295/molecular-hypotheses-to-explain-the-shared-pathways-and-underlying-pathobiological-causes-in-catatonia-and-in-catatonic-presentations-in-neuropsychiatric-disorders
#1
E M Peter-Ross
The pathobiological causes, the shared cellular and molecular pathways in catatonia and in catatonic presentation in neuropsychiatric disorders are yet to be determined. The hypotheses in this paper have been deduced from the latest scientific research findings and clinical observations of patients with genetic disorders, behavioral phenotypes and other family members suffering mental disorders. The first hypothesis postulates that catatonia and the heterogeneity of catatonic signs and symptoms involve nucleolar dysfunction arising from abnormalities of the brain-specific, non-coding micro-RNA, SNORD115 genes (either duplications or deletions) which result in pathobiological dysfunction of various combinations in the downstream pathways (possibly along with other genes in these shared pathways)...
April 2018: Medical Hypotheses
https://www.readbyqxmd.com/read/29520059/mice-with-reduced-dat-levels-recreate-seasonal-induced-switching-between-states-in-bipolar-disorder
#2
Jared W Young, Zackary A Cope, Benedetto Romoli, Esther Schrurs, Aniek Joosen, Jordy van Enkhuizen, Richard F Sharp, Davide Dulcis
Developing novel therapeutics for bipolar disorder (BD) has been hampered by limited mechanistic knowledge how sufferers switch between mania and depression-how the same brain can switch between extreme states-described as the "holy grail" of BD research. Strong evidence implicates seasonally-induced switching between states, with mania associated with summer-onset, depression with winter-onset. Determining mechanisms of and sensitivity to such switching is required. C57BL/6J and dopamine transporter hypomorphic (DAT-HY 50% expression) mice performed a battery of psychiatry-relevant behavioral tasks following 2-week housing in chambers under seasonally relevant photoperiod extremes...
February 27, 2018: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29427067/individual-biological-sensitivity-to-environmental-influences-testing-the-differential-susceptibility-properties-of-the-5httlpr-polymorphism-in-relation-to-depressive-symptoms-and-delinquency-in-two-adolescent-general-samples
#3
Cecilia Åslund, Kent W Nilsson
The gene-environment interaction research field in psychiatry has traditionally been dominated by the diathesis-stress framework, where certain genotypes are assumed to confer increased risk for adverse outcomes in a stressful environment. In later years, theories of differential susceptibility, or biological sensitivity, suggest that candidate genes that interact with environmental events do not exclusively confer a risk for behavioural or psychiatric disorders but rather seem to alter the sensitivity to both positive and negative environmental influences...
February 9, 2018: Journal of Neural Transmission
https://www.readbyqxmd.com/read/29325731/pharmacogenomic-testing-in-child-and-adolescent-psychiatry-an-evidence-based-review
#4
Anna M Wehry, Laura Ramsey, Shane E Dulemba, Sarah A Mossman, Jeffrey R Strawn
Significant advances have been made in the application of pharmacogenomic testing for the treatment of patients with psychiatric disorders. Over the past decade, a number of studies have evaluated the utility of pharmacogenomic testing in pediatric patients with psychiatric disorders. The evidence base for pharmacogenomic testing in youth with depressive and anxiety disorders as well as attention/deficit hyperactivity disorder (ADHD) is reviewed in this article. General pharmacogenomic principles are summarized and functional polymorphisms in P450 enzymes (and associated metabolizer phenotypes), the serotonin transporter promoter polymorphisms, serotonin 2A receptor genes (e...
February 2018: Current Problems in Pediatric and Adolescent Health Care
https://www.readbyqxmd.com/read/29289701/dopamine-transporter-knockdown-mice-in-the-behavioral-pattern-monitor-a-robust-reproducible-model-for-mania-relevant-behaviors
#5
Molly A Kwiatkowski, Gerhard Hellemann, Catherine A Sugar, Zackary A Cope, Arpi Minassian, William Perry, Mark A Geyer, Jared W Young
Efforts to replicate results from both basic and clinical models have highlighted problems with reproducibility in science. In psychiatry, reproducibility issues are compounded because the complex behavioral syndromes make many disorders challenging to model. We develop translatable tasks that quantitatively measure psychiatry-relevant behaviors across species. The behavioral pattern monitor (BPM) was designed to analyze exploratory behaviors, which are altered in patients with bipolar disorder (BD), especially during mania episodes...
December 28, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/29158913/an-implementation-effectiveness-hybrid-trial-of-video-based-family-therapy-for-peripartum-depression-in-home-visited-mothers-a-protocol-for-a-pilot-trial
#6
Fallon Cluxton-Keller, Craig L Donnelly, Melony Williams, Jennifer Buteau, Patricia Stolte, Maggie Monroe-Cassel, Martha L Bruce
Background: The Federal Maternal, Infant, and Early Childhood Home Visiting (HV) Program serves over 100,000 vulnerable families at risk for child abuse in the USA and aims to improve many outcomes, including maternal mental health (HRSA's Federal Home Visiting Program: partnering with parents to help children succeed, 2017). Most clients are insured by Medicaid, and about 40% are adolescent mothers (pregnant and post-delivery) (The mother and infant home visiting program evaluation: early findings on the Maternal, Infant, and Early Childhood Home Visiting Program, 2015)...
2017: Pilot and Feasibility Studies
https://www.readbyqxmd.com/read/29115994/exploring-venlafaxine-pharmacokinetic-variability-with-a-phenotyping-approach-a-multicentric-french-swiss-study-marvel-study
#7
Célia Lloret-Linares, Youssef Daali, Sylvie Chevret, Isabelle Nieto, Fanny Molière, Philippe Courtet, Florence Galtier, Raphaëlle-Marie Richieri, Sophie Morange, Pierre-Michel Llorca, Wissam El-Hage, Thomas Desmidt, Frédéric Haesebaert, Philippe Vignaud, Jerôme Holtzmann, Jean-Luc Cracowski, Marion Leboyer, Antoine Yrondi, Fabienne Calvas, Liova Yon, Philippe Le Corvoisier, Olivier Doumy, Kyle Heron, Damien Montange, Siamak Davani, Julien Déglon, Marie Besson, Jules Desmeules, Emmanuel Haffen, Frank Bellivier
BACKGROUND: It is well known that the standard doses of a given drug may not have equivalent effects in all patients. To date, the management of depression remains mainly empirical and often poorly evaluated. The development of a personalized medicine in psychiatry may reduce treatment failure, intolerance or resistance, and hence the burden and costs of mood depressive disorders. The Geneva Cocktail Phenotypic approach presents several advantages including the "in vivo" measure of different cytochromes and transporter P-gp activities, their simultaneous determination in a single test, avoiding the influence of variability over time on phenotyping results, the administration of low dose substrates, a limited sampling strategy with an analytical method developed on DBS analysis...
November 7, 2017: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29061424/dopamine-transporter-gene-polymorphism-in-children-with-adhd-a-pilot-study-in-indonesian-samples
#8
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/29033635/evaluation-of-5-httlpr-gene-polymorphism-and-resilience-components-on-the-development-of-psychopathology-in-adolescent-sexual-abuse-cases
#9
Gresa Çarkaxhiu Bulut, Ayşe Rodopman Arman, İlter Güney, Pınar Gültepe
INTRODUCTION: More than one-fourth adolescents are exposed to unexpected frightening experiences and traumas until adulthood. In this study, we aimed to determine the potential role of serotonin transporter (5-HTT) gene polymorphism regarding resilience factors in the symptom variability of individuals exposed to sexual abuse. METHODS: Adolescents aged 11-17 years, who were admitted to the Marmara University Child Psychiatry Outpatient Clinic Forensic division with sexual abuse experience history, were informed about the research, and volunteers were included in the study...
September 2017: Noro Psikiyatri Arsivi
https://www.readbyqxmd.com/read/28963561/drug-enrichment-and-discovery-from-schizophrenia-genome-wide-association-results-an-analysis-and-visualisation-approach
#10
H A Gaspar, G Breen
Using successful genome-wide association results in psychiatry for drug repurposing is an ongoing challenge. Databases collecting drug targets and gene annotations are growing and can be harnessed to shed a new light on psychiatric disorders. We used genome-wide association study (GWAS) summary statistics from the Psychiatric Genetics Consortium (PGC) Schizophrenia working group to build a drug repositioning model for schizophrenia. As sample size increases, schizophrenia GWAS results show increasing enrichment for known antipsychotic drugs, selective calcium channel blockers, and antiepileptics...
September 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28934028/toward-neuroproteomics-in-biological-psychiatry-a-systems-approach-unravels-okadaic-acid-induced-alterations-in-the-neuronal-phosphoproteome
#11
Joana Machado Oliveira, Cristóvão B da Cruz E Silva, Thorsten Müller, Tânia Soares Martins, Marta Cova, Odete A B da Cruz E Silva, Ana Gabriela Henriques
Neuroproteomics is an evolving field of postgenomic medicine, highlighting the convergence of psychiatry/neurology and proteomics, yet compared with neurogenetics, it has received little attention. This study in rat primary neuronal cultures provides an example of a neuroproteomic approach relevant to the study of psychiatric disease pathophysiology, focusing on Alzheimer's disease. In this context, okadaic acid (OA) is routinely used in experimental designs to investigate phosphorylation-mediated events. It is a potent protein phosphatase (PP) inhibitor, particularly of PP1 and PP2A...
September 2017: Omics: a Journal of Integrative Biology
https://www.readbyqxmd.com/read/28894304/quantification-of-brain-cholinergic-denervation-in-alzheimer-s-disease-using-pet-imaging-with-18-f-feobv
#12
M Aghourian, C Legault-Denis, J-P Soucy, P Rosa-Neto, S Gauthier, A Kostikov, P Gravel, M-A Bédard
18 F-fluoroethoxybenzovesamicol (FEOBV) is a new PET radiotracer that binds to the vesicular acetylcholine transporter. In both animals and healthy humans, FEOBV was found sensitive and reliable to characterize presynaptic cholinergic nerve terminals in the brain. It has been used here for we believe the first time in patients with Alzheimer's disease (AD) to quantify brain cholinergic losses. The sample included 12 participants evenly divided in healthy subjects and patients with AD, all assessed with the Mini-Mental State Examination (MMSE) and Montreal Cognitive Assessment (MoCA) cognitive scales...
November 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28894302/g%C3%AE-%C3%AE-subunit-activation-promotes-dopamine-efflux-through-the-dopamine-transporter
#13
J Garcia-Olivares, T Baust, S Harris, P Hamilton, A Galli, S G Amara, G E Torres
The dopamine transporter (DAT) is an important regulator of brain dopamine (DA) homeostasis, controlling the intensity and duration of DA signaling. DAT is the target for psychostimulants-like cocaine and amphetamine-and plays an important role in neuropsychiatric disorders, including attention-deficit hyperactivity disorder and drug addiction. Thus, a thorough understanding of the mechanisms that regulate DAT function is necessary for the development of clinical interventions to treat DA-related brain disorders...
December 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28829051/dopamine-transporter-and-reward-anticipation-in-a-dimensional-perspective-a-multimodal-brain-imaging-study
#14
Manon Dubol, Christian Trichard, Claire Leroy, Anca-Larisa Sandu, Mehdi Rahim, Bernard Granger, Eleni T Tzavara, Laurent Karila, Jean-Luc Martinot, Eric Artiges
Dopamine function and reward processing are highly interrelated and involve common brain regions afferent to the nucleus accumbens, within the mesolimbic pathway. Although dopamine function and reward system neural activity are impaired in most psychiatric disorders, it is unknown whether alterations in the dopamine system underlie variations in reward processing across a continuum encompassing health and these disorders. We explored the relationship between dopamine function and neural activity during reward anticipation in 27 participants including healthy volunteers and psychiatric patients with schizophrenia, depression, or cocaine addiction, using functional magnetic resonance imaging (fMRI) and positron emission tomography (PET) multimodal imaging with a voxel-based statistical approach...
March 2018: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28811687/a-preliminary-study-on-investigation-of-serum-%C3%AE-synuclein-and-tau-protein-levels-in-children-with-attention-deficit-hyperactivity%C3%A2-disorder
#15
Ihsan Cetin, Seref Simsek
Neurodegenerative molecules play an important role in maintaining a supply for synaptic vesicles; and they are also likely to help regulate the dopamine release which is the primary mechanism of action in pharmacological treatments for attention deficit hyperactivity disorder (ADHD). It is suggested that there could be interactions between α-synuclein and tau in cytoskeletal disorganization and synaptic dystrophy. Therefore, we aim to determine the serum levels of neurodegenerative molecules such as α-synuclein and tau in children with ADHD...
July 2017: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/28727685/erbb4-signaling-in-dopaminergic-axonal-projections-increases-extracellular-dopamine-levels-and-regulates-spatial-working-memory-behaviors
#16
M Skirzewski, I Karavanova, A Shamir, L Erben, J Garcia-Olivares, J H Shin, D Vullhorst, V A Alvarez, S G Amara, A Buonanno
Genetic variants of Neuregulin 1 (NRG1) and its neuronal tyrosine kinase receptor ErbB4 are associated with risk for schizophrenia, a neurodevelopmental disorder characterized by excitatory/inhibitory imbalance and dopamine (DA) dysfunction. To date, most ErbB4 studies have focused on GABAergic interneurons in the hippocampus and neocortex, particularly fast-spiking parvalbumin-positive (PV+) basket cells. However, NRG has also been shown to modulate DA levels, suggesting a role for ErbB4 signaling in dopaminergic neuron function...
July 20, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28439098/uncoupling-dapk1-from-nmda-receptor-glun2b-subunit-exerts-rapid-antidepressant-like-effects
#17
S-X Li, Y Han, L-Z Xu, K Yuan, R-X Zhang, C-Y Sun, D-F Xu, M Yuan, J-H Deng, S-Q Meng, X-J Gao, Q Wen, L-J Liu, W-L Zhu, Y-X Xue, M Zhao, J Shi, L Lu
Several preclinical studies have reported the rapid antidepressant effects of N-methyl-D-aspartate receptor (NMDAR) antagonists, although the underlying mechanisms are still unclear. Death-associated protein kinase 1 (DAPK1) couples GluN2B subunits at extrasynaptic sites to regulate NMDAR channel conductance. In the present study, we found that chronic unpredictable stress (CUS) induced extracellular glutamate accumulation, accompanied by an increase in the DAPK1-NMDAR interaction, the high expression of DAPK1 and phosphorylated GluN2B at Ser1303, a decrease in phosphorylated DAPK1 at Ser308 and synaptic protein deficits in the rat medial prefrontal cortex (mPFC)...
March 2018: Molecular Psychiatry
https://www.readbyqxmd.com/read/28373689/collaborative-meta-analysis-finds-no-evidence-of-a-strong-interaction-between-stress-and-5-httlpr-genotype-contributing-to-the-development-of-depression
#18
R C Culverhouse, N L Saccone, A C Horton, Y Ma, K J Anstey, T Banaschewski, M Burmeister, S Cohen-Woods, B Etain, H L Fisher, N Goldman, S Guillaume, J Horwood, G Juhasz, K J Lester, L Mandelli, C M Middeldorp, E Olié, S Villafuerte, T M Air, R Araya, L Bowes, R Burns, E M Byrne, C Coffey, W L Coventry, K A B Gawronski, D Glei, A Hatzimanolis, J-J Hottenga, I Jaussent, C Jawahar, C Jennen-Steinmetz, J R Kramer, M Lajnef, K Little, H M Zu Schwabedissen, M Nauck, E Nederhof, P Petschner, W J Peyrot, C Schwahn, G Sinnamon, D Stacey, Y Tian, C Toben, S Van der Auwera, N Wainwright, J-C Wang, G Willemsen, I M Anderson, V Arolt, C Åslund, G Bagdy, B T Baune, F Bellivier, D I Boomsma, P Courtet, U Dannlowski, E J C de Geus, J F W Deakin, S Easteal, T Eley, D M Fergusson, A M Goate, X Gonda, H J Grabe, C Holzman, E O Johnson, M Kennedy, M Laucht, N G Martin, M R Munafò, K W Nilsson, A J Oldehinkel, C A Olsson, J Ormel, C Otte, G C Patton, B W J H Penninx, K Ritchie, M Sarchiapone, J M Scheid, A Serretti, J H Smit, N C Stefanis, P G Surtees, H Völzke, M Weinstein, M Whooley, J I Nurnberger, N Breslau, L J Bierut
The hypothesis that the S allele of the 5-HTTLPR serotonin transporter promoter region is associated with increased risk of depression, but only in individuals exposed to stressful situations, has generated much interest, research and controversy since first proposed in 2003. Multiple meta-analyses combining results from heterogeneous analyses have not settled the issue. To determine the magnitude of the interaction and the conditions under which it might be observed, we performed new analyses on 31 data sets containing 38 802 European ancestry subjects genotyped for 5-HTTLPR and assessed for depression and childhood maltreatment or other stressful life events, and meta-analysed the results...
January 2018: Molecular Psychiatry
https://www.readbyqxmd.com/read/28289283/the-dopamine-hypothesis-of-bipolar-affective-disorder-the-state-of-the-art-and-implications-for-treatment
#19
REVIEW
A H Ashok, T R Marques, S Jauhar, M M Nour, G M Goodwin, A H Young, O D Howes
Bipolar affective disorder is a common neuropsychiatric disorder. Although its neurobiological underpinnings are incompletely understood, the dopamine hypothesis has been a key theory of the pathophysiology of both manic and depressive phases of the illness for over four decades. The increased use of antidopaminergics in the treatment of this disorder and new in vivo neuroimaging and post-mortem studies makes it timely to review this theory. To do this, we conducted a systematic search for post-mortem, pharmacological, functional magnetic resonance and molecular imaging studies of dopamine function in bipolar disorder...
May 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28167616/towards-trans-diagnostic-mechanisms-in-psychiatry-neurobehavioral-profile-of-rats-with-a-loss-of-function-point-mutation-in-the-dopamine-transporter-gene
#20
Valentina Vengeliene, Anton Bespalov, Martin Roßmanith, Sandra Horschitz, Stefan Berger, Ana L Relo, Hamid R Noori, Peggy Schneider, Thomas Enkel, Dusan Bartsch, Miriam Schneider, Berthold Behl, Anita C Hansson, Patrick Schloss, Rainer Spanagel
The research domain criteria (RDoC) matrix has been developed to reorient psychiatric research towards measurable behavioral dimensions and underlying mechanisms. Here, we used a new genetic rat model with a loss-of-function point mutation in the dopamine transporter (DAT) gene ( Slc6a3 _N157K) to systematically study the RDoC matrix. First, we examined the impact of the Slc6a3 _N157K mutation on monoaminergic signaling. We then performed behavioral tests representing each of the five RDoC domains: negative and positive valence systems, cognitive, social and arousal/regulatory systems...
April 1, 2017: Disease Models & Mechanisms
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