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Cognitive psychiatry

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https://www.readbyqxmd.com/read/28336159/the-anticholinergic-impregnation-scale-towards-the-elaboration-of-a-scale-adapted-to-prescriptions-in-french-psychiatric-settings
#1
Jeanne Briet, Hervé Javelot, Edwige Heitzmann, Luisa Weiner, Catherine Lameira, Philippe D'Athis, Marie Corneloup, Jean-Louis Vailleau
PURPOSE: Some drugs have anticholinergic activity and can cause peripheral or central side effects. Several scales exist to evaluate the potential anticholinergic effect of prescribed drugs but: (i) they are validated in the elderly and mainly assess the cognitive side effect of treatments; (ii) they do not concern some of the drugs frequently used in clinical psychiatry in France. The aim of our study is to develop a new scale, the anticholinergic impregnation scale (AIS), with drugs used in France and based on an assessment of the drugs used against peripheral anticholinergic adverse effects...
February 17, 2017: Thérapie
https://www.readbyqxmd.com/read/28322283/susceptibility-to-neurofibrillary-tangles-role-of-the-ptprd-locus-and-limited-pleiotropy-with-other-neuropathologies
#2
L B Chibnik, C C White, S Mukherjee, T Raj, L Yu, E B Larson, T J Montine, C D Keene, J Sonnen, J A Schneider, P K Crane, J M Shulman, D A Bennett, P L De Jager
Tauopathies, including Alzheimer's disease (AD) and other neurodegenerative conditions, are defined by a pathological hallmark: neurofibrillary tangles (NFTs). NFT accumulation is thought to be closely linked to cognitive decline in AD. Here, we perform a genome-wide association study for NFT pathologic burden and report the association of the PTPRD locus (rs560380, P=3.8 × 10(-8)) in 909 prospective autopsies. The association is replicated in an independent data set of 369 autopsies. The association of PTPRD with NFT is not dependent on the accumulation of amyloid pathology...
March 21, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28322275/oxidative-stress-driven-parvalbumin-interneuron-impairment-as-a-common-mechanism-in-models-of-schizophrenia
#3
P Steullet, J-H Cabungcal, J Coyle, M Didriksen, K Gill, A A Grace, T K Hensch, A-S LaMantia, L Lindemann, T M Maynard, U Meyer, H Morishita, P O'Donnell, M Puhl, M Cuenod, K Q Do
Parvalbumin inhibitory interneurons (PVIs) are crucial for maintaining proper excitatory/inhibitory balance and high-frequency neuronal synchronization. Their activity supports critical developmental trajectories, sensory and cognitive processing, and social behavior. Despite heterogeneity in the etiology across schizophrenia and autism spectrum disorder, PVI circuits are altered in these psychiatric disorders. Identifying mechanism(s) underlying PVI deficits is essential to establish treatments targeting in particular cognition...
March 21, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28289280/biochemical-physiological-and-clinical-effects-of-l-methylfolate-in-schizophrenia-a-randomized-controlled-trial
#4
J L Roffman, L J Petruzzi, A S Tanner, H E Brown, H Eryilmaz, N F Ho, M Giegold, N J Silverstein, T Bottiglieri, D S Manoach, J W Smoller, D C Henderson, D C Goff
Folic acid supplementation confers modest benefit in schizophrenia, but its effectiveness is influenced by common genetic variants in the folate pathway that hinder conversion to its active form. We examined physiological and clinical effects of l-methylfolate, the fully reduced and bioactive form of folate, in schizophrenia. In this randomized, double-blind trial, outpatients with schizophrenia (n=55) received l-methylfolate 15 mg or placebo for 12 weeks. Patients were maintained on stable doses of antipsychotic medications...
March 14, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28289278/cafeteria-diet-and-probiotic-therapy-cross-talk-among-memory-neuroplasticity-serotonin-receptors-and-gut-microbiota-in-the-rat
#5
J E Beilharz, N O Kaakoush, J Maniam, M J Morris
The western diet is known to have detrimental effects on cognition and the gut microbiota, but few studies have investigated how these may be related. Here, we examined whether a probiotic could prevent diet-induced memory deficits. Rats were pre-exposed to vehicle, low or high doses of VSL#3 for 2 weeks before half were switched from chow to a cafeteria diet (Caf) for 25 days; VSL#3 treatment continued until death. High-dose VSL#3 prevented the diet-induced memory deficits on the hippocampal-dependent place task, but the probiotic caused deficits on the perirhinal-dependent object task, irrespective of diet or dose...
March 14, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28287191/-history-of-clinical-psychiatry-of-sapienza-university-of-rome-in-policlinico-umberto-i
#6
Maria Antonietta Coccanari De' Fornari, Angela Iannitelli, Massimo Biondi
The present article intends to go over the history of the Psychiatric Clinic of the Sapienza University of Rome, starting from the beginning of the teaching of Psychiatry at Santa Maria della Pietà mental hospital, back in 1871, to the eventual founding, at the University "La Sapienza" and the Umberto I general hospital, of the Institute of Psychiatric Clinic and next of the Nervous and Mental Diseases' Clinic with the enclosed specialization school in Psychiatry. A detailed overview is supplied on the characters of the eminent scientists who have succeeded over time at the head of the Clinic and on the description of its different organization, conceived by each of them because of their educational and cultural roots...
January 2017: Rivista di Psichiatria
https://www.readbyqxmd.com/read/28282077/-endophenotypes-in-psychiatry
#7
Salvador M Guinjoan
We review the concept of endophenotype, and its relationship with related terms in use in the scientific literature, including "biomarker" and "intermediate phenotype". We then explain the importance of the concept in current psychiatry research. Specifically, we focus in the potential importance of endophenotypes in both disentangling the genetic causes, and improving the dimensional and pathophysiologic definition, of psychiatric nosological categories. After delineating which types of variables could constitute valid endophenotypes, we describe efforts in defining neurobiological signatures of social cognitive deficits in schizophrenia as an example with potential heuristic value...
September 2016: Vertex: Revista Argentina de Psiquiatriá
https://www.readbyqxmd.com/read/28282074/-epigenetics-2-0-the-multiple-faces-of-the-genome
#8
Marcelo Rubinstein
Epigenetics is the branch of genetics that studies the dynamic relationship between stable genotypes and varying phenotypes. To this end, epigenetics aims to discover the molecular mechanisms that explain how different nutrients and hormones, environmental changes, and emotional, social and cognitive experiences modify gene expression and behaviors, even permanently so. Psychiatry has learned that diseases with strong genetic predisposition, such as schizophrenia, show a concordance of around 50% between monozygotic twins, thus evidencing the importance of the genetic background and the presence of environmental variables that stimulate or block phenotypic development...
September 2016: Vertex: Revista Argentina de Psiquiatriá
https://www.readbyqxmd.com/read/28265121/brain-structural-and-functional-signatures-of-impulsive-compulsive-behaviours-in-parkinson-s-disease
#9
F Imperiale, F Agosta, E Canu, V Markovic, A Inuggi, M Jecmenica-Lukic, A Tomic, M Copetti, S Basaia, V S Kostic, M Filippi
This study assessed brain structural and functional alterations in patients with Parkinson's disease and impulsive-compulsive behaviours (PD-ICB) compared with controls and PD no-ICB cases. Eighty-five PD patients (35 PD-ICB) and 50 controls were recruited. All subjects underwent three-dimensional T1-weighted, diffusion tensor (DT), and resting state functional magnetic resonance imaging (RS fMRI). We assessed cortical thickness with surface-based morphometry, subcortical volumes using FIRST, DT MRI metrics using region of interest and tractography approaches, and RS fMRI using a model free approach...
March 7, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28265120/a-genome-wide-gene-by-trauma-interaction-study-of-alcohol-misuse-in-two-independent-cohorts-identifies-prkg1-as-a-risk-locus
#10
R Polimanti, J Kaufman, H Zhao, H R Kranzler, R J Ursano, R C Kessler, J Gelernter, M B Stein
Traumatic life experiences are associated with alcohol use problems, an association that is likely to be moderated by genetic predisposition. To understand these interactions, we conducted a gene-by-environment genome-wide interaction study (GEWIS) of alcohol use problems in two independent samples, the Army STARRS (STARRS, N=16 361) and the Yale-Penn (N=8084) cohorts. Because the two cohorts were assessed using different instruments, we derived separate dimensional alcohol misuse scales and applied a proxy-phenotype study design...
March 7, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28261144/parallel-distinct-structures-of-internal-world-and-external-reality-disavowing-and-re-claiming-the-self-identity-in-the-aftermath-of-trauma-generated-dissociation
#11
Vedat Şar
The nature of consciousness and the autonomy of the individual's mind have been a focus of interest throughout the past century and inspired many theories and models. Revival of studies on psychological trauma and dissociation, which remained outside mainstream psychiatry, psychology, and psychoanalysis for the most part of the past century, has provided a new opportunity to revisit this intellectual and scientific endeavor. This paper attempts to integrate a series of empirical and theoretical studies on psychological consequences of developmental traumatization, which may yield further insight into factors which threaten the integrity of human consciousness...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28242871/attenuation-of-ketamine-induced-impairment-in-verbal-learning-and-memory-in-healthy-volunteers-by-the-ampa-receptor-potentiator-pf-04958242
#12
M Ranganathan, N DeMartinis, B Huguenel, F Gaudreault, M M Bednar, C L Shaffer, S Gupta, J Cahill, M A Sherif, J Mancuso, L Zumpano, D C D'Souza
There is a need to develop treatments for cognitive impairment associated with schizophrenia (CIAS). The significant role played by N-methyl-d-aspartate receptors (NMDARs) in both the pathophysiology of schizophrenia and in neuronal plasticity suggests that facilitation of NMDAR function might ameliorate CIAS. One strategy to correct NMDAR hypofunction is to stimulate α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptors (AMPARs) as AMPAR and NMDAR functioning are coupled and interdependent. In rats and nonhuman primates (NHP), AMPAR potentiators reduce spatial working memory deficits caused by the nonselective NMDAR antagonist ketamine...
February 28, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28237826/treatment-considerations-for-depression-research-in-older-married-couples-a-dyadic-case-study
#13
Sarah T Stahl, Juleen Rodakowski, Ariel G Gildengers, Charles F Reynolds, Jennifer Q Morse, Kevin Rico, Meryl A Butters
OBJECTIVE: Critical gaps remain in understanding optimal approaches to intervening with older couples. The focus of this report is to describe the pros and cons of incorporating spousal dyads into depression-prevention research. METHODS: In an intervention development study, the authors administered problem-solving therapy (PST) dyadically to participants with mild cognitive impairment (MCI) and their caregivers. Dyads worked with the same interventionist in the same therapy session...
January 4, 2017: American Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28220477/parent-child-learning-interactions-a-review-of-the-literature-on-scaffolding
#14
Roni Mermelshtine
BACKGROUND: Scaffolding can be observed during learning-based interactions, when interventions by parents are adjusted according to children's observed abilities, with the main goal of enabling the child to work independently (Wood et al., 1976, Journal of child psychology and psychiatry, 17, 89). Such contingent instruction behaviours occur from infancy, and are said to be relevant for children's development of executive function, language acquisition, and cognitive and academic abilities...
February 21, 2017: British Journal of Educational Psychology
https://www.readbyqxmd.com/read/28220082/synaptic-and-neuronal-autoantibody-associated-psychiatric-syndromes-controversies-and-hypotheses
#15
Adam Al-Diwani, Thomas A Pollak, Alexander E Langford, Belinda R Lennox
Autoimmune encephalitis (AE) mediated by antibodies against synaptic and neuronal surface targets frequently presents with a psychiatric syndrome. In these patients, removal of autoantibodies treats the disease and outcomes are closely linked to early intervention. The discovery of these autoantibodies in isolated psychiatric syndromes has raised the possibility that these patients may derive similar benefits from immunotherapy, a potentially transformational approach to the treatment of mental illness. Although open-label case series suggest impressive therapeutic outcomes, the pathological relevance of these autoantibodies outside of canonical presentations is debated...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/28220044/pregnenolone-blocks-cannabinoid-induced-acute-psychotic-like-states-in-mice
#16
A Busquets-Garcia, E Soria-Gómez, B Redon, Y Mackenbach, M Vallée, F Chaouloff, M Varilh, G Ferreira, P-V Piazza, G Marsicano
Cannabis-induced acute psychotic-like states (CIAPS) represent a growing health issue, but their underlying neurobiological mechanisms are poorly understood. The use of antipsychotics and benzodiazepines against CIAPS is limited by side effects and/or by their ability to tackle only certain aspects of psychosis. Thus, safer wide-spectrum treatments are currently needed. Although the blockade of cannabinoid type-1 receptor (CB1) had been suggested as a therapeutical means against CIAPS, the use of orthosteric CB1 receptor full antagonists is strongly limited by undesired side effects and low efficacy...
February 21, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28217838/the-experiences-of-people-with-dementia-and-their-carers-participating-in-individual-cognitive-stimulation-therapy
#17
Phuong Leung, Lauren Yates, Vasiliki Orgeta, Fara Hamidi, Martin Orrell
BACKGROUND: The carer-delivered individual cognitive stimulation therapy (iCST) was developed to improve cognition and quality of life of people with dementia. This study aims to explore people with dementia and family carers' concepts of mental stimulation and experiences of participating in the iCST intervention. METHODS: A sub-sample of 23 dyads of people with dementia and their family carers who completed the iCST intervention took part in semi-structured in-depth interviews...
February 20, 2017: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28211553/the-assessment-of-schizotypy-by-the-o-life-oxford-liverpool-inventory-for-feelings-and-experiences-in-patients-with-schizophrenia-and-affective-disorders
#18
Daria Dembińska-Krajewska, Janusz Rybakowski
OBJECTIVES: The aim of the study was to assess schizotypy by using the Oxford-Liverpool Inventory of Feelings and Experiences (O-LIFE), in the groups of patients with schizophrenia, bipolar disorder (BD) and unipolar (recurrent) depression (UD). An important element of the study was to compare - in terms of similarity - the results obtained in schizophrenia and BD, and - in terms of differences - the results obtained in BD and UD. METHODS: The study involved 58 patients with schizophrenia (35 men, 23 women, mean age = 34...
December 23, 2016: Psychiatria Polska
https://www.readbyqxmd.com/read/28195316/structural-hierarchy-of-autism-spectrum-disorder-symptoms-an-integrative-framework
#19
Hyunsik Kim, Cara M Keifer, Craig Rodriguez-Seijas, Nicholas R Eaton, Matthew D Lerner, Kenneth D Gadow
BACKGROUND: In an attempt to resolve questions regarding the symptom classification of autism spectrum disorder (ASD), previous research generally aimed to demonstrate superiority of one model over another. Rather than adjudicating which model may be optimal, we propose an alternative approach that integrates competing models using Goldberg's bass-ackwards method, providing a comprehensive understanding of the underlying symptom structure of ASD. METHODS: The study sample comprised 3,825 individuals, consecutive referrals to a university hospital developmental disabilities specialty clinic or a child psychiatry outpatient clinic...
February 14, 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28194005/genetic-inhibition-of-neurotransmission-reveals-role-of-glutamatergic-input-to-dopamine-neurons-in-high-effort-behavior
#20
M A Hutchison, X Gu, M F Adrover, M R Lee, T S Hnasko, V A Alvarez, W Lu
Midbrain dopamine neurons are crucial for many behavioral and cognitive functions. As the major excitatory input, glutamatergic afferents are important for control of the activity and plasticity of dopamine neurons. However, the role of glutamatergic input as a whole onto dopamine neurons remains unclear. Here we developed a mouse line in which glutamatergic inputs onto dopamine neurons are specifically impaired, and utilized this genetic model to directly test the role of glutamatergic inputs in dopamine-related functions...
February 14, 2017: Molecular Psychiatry
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