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schizophrenia cognition

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https://www.readbyqxmd.com/read/29239287/school-performance-from-primary-education-in-the-adolescent-offspring-of-parents-with-schizophrenia-and-bipolar-disorder-a-national-register-based-study
#1
Anne Ranning, Thomas Laursen, Esben Agerbo, Anne Thorup, Carsten Hjorthøj, Jens Richardt Møllegaard Jepsen, Merete Nordentoft
BACKGROUND: Schizophrenia (SZ) and bipolar disorder (BP) are causes of severe disability worldwide and parents' severe mental illness (SMI) is associated with childhood adversity, and socio-emotional and cognitive problems in children. Yet, how parental BP and SZ affect educational attainment in offspring is still unclear. METHOD: We included all children (N = 684.248) born and living in Denmark between 1986 and 1996 and their parents. Our follow-up lasted from 1986 until children's graduation in 2014...
December 14, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/29238487/morphology-of-the-corpus-callosum-and-schizophrenia-a-case-control-study-in-kashan-iran
#2
Afshin Ahmadvand, Shahab Bagherzadeh Shahidi, Hamidreza Talari, Fatemeh Sadat Ghoreishi, Gholam Abbas Mousavi
Background: Corpus Callosum (CC) plays a significant role in hemispheric communication and in lateralized brain function and behaviors. Structural abnormalities in the corpus callosum of schizophrenic patients were reported. However, previous studies regarding the relationship between morphology of CC in patients with schizophrenia and healthy people are controversial. Objective: To evaluate the morphological differences of the CC between patients with chronic schizophrenia and healthy people and to examine the relationship between the characteristics of the CC and schizophrenia severity...
October 2017: Electronic Physician
https://www.readbyqxmd.com/read/29238310/parameter-based-evaluation-of-attentional-impairments-in-schizophrenia-and-their-modulation-by-prefrontal-transcranial-direct-current-stimulation
#3
Nadine Gögler, Irina Papazova, Tatiana Oviedo-Salcedo, Nina Filipova, Wolfgang Strube, Johanna Funk, Hermann J Müller, Kathrin Finke, Alkomiet Hasan
Background: Attentional dysfunctions constitute core cognitive symptoms in schizophrenia, but the precise underlying neurocognitive mechanisms remain to be elucidated. Methods: In this randomized, double-blind, sham-controlled study, we applied, for the first time, a theoretically grounded modeling approach based on Bundesen's Theory of Visual Attention (TVA) to (i) identify specific visual attentional parameters affected in schizophrenia and (ii) assess, as a proof of concept, the potential of single-dose anodal transcranial direct current stimulation (tDCS; 20 min, 2 mA) to the left dorsolateral prefrontal cortex to modulate these attentional parameters...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/29237730/an-allosteric-binding-site-of-the-%C3%AE-7-nicotinic-acetylcholine-receptor-revealed-in-a-humanized-acetylcholine-binding-protein
#4
Florian Delbart, Marijke Brams, Fabian Gruss, Sam Noppen, Steve Peigneur, Sandro Boland, Patrick Chaltin, Jose Brandao-Neto, Frank von Delft, Wouter G Touw, Robbie Joosten, Sandra Liekens, Jan Tytgat, Chris Ulens
Nicotinic acetylcholine receptors (nAChRs) belong to the family of pentameric ligand-gated ion channels and mediate fast excitatory transmission in the central and peripheral nervous systems. Among the different existing receptor subtypes, the homomeric & α7 nAChR has attracted considerable attention because of its possible implication in several neurological and psychiatric disorders, including cognitive decline associated with Alzheimer's disease or schizophrenia. Allosteric modulators of ligand-gated ion channels are of particular interest as therapeutic agents, as they modulate receptor activity without affecting normal fluctuations of synaptic neurotransmitter release...
December 13, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29233210/optical-coherence-tomography-indices-of-structural-retinal-pathology-in-schizophrenia
#5
Steven M Silverstein, Danielle Paterno, Lindsay Cherneski, Stuart Green
BACKGROUND: Prior optical coherence tomography (OCT) studies of schizophrenia have identified thinning of retinal layers. However, findings have varied across reports, and most studies have had serious methodological limitations. To address unresolved issues, we determined whether: (1) retinal thinning in schizophrenia occurs independently of comorbid medical conditions that affect the retina; (2) thinning is independent of antipsychotic medication dose; (3) optic nerve parameters are abnormal in schizophrenia; and (4) OCT indices are related to visual and cognitive impairments common in schizophrenia...
December 13, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/29231006/-characteristics-of-schizophrenia-patients-homicide-behaviors-and-their-correlations-with-criminal-capacity
#6
Z W Sun, T T Shi, P X Fu
OBJECTIVES: To explore the characteristics of schizophrenia patients' homicide behaviors and the influences of the assessments of criminal capacity. METHODS: Indicators such as demographic and clinical data, characteristics of criminal behaviors and criminal capacity from the suspects whom were diagnosed by forensic psychiatry as schizophrenia (n=110) and normal mental (n=70) with homicide behavior, were collected by self-made investigation form and compared...
February 2017: Fa Yi Xue za Zhi
https://www.readbyqxmd.com/read/29230507/evidence-for-regional-hippocampal-damage-in-patients-with-schizophrenia
#7
Sadhana Singh, Subash Khushu, Pawan Kumar, Satnam Goyal, Triptish Bhatia, Smita N Deshpande
PURPOSE: Schizophrenia patients show cognitive and mood impairments, including memory loss and depression, suggesting damage in the brain regions. The hippocampus is a brain structure that is significantly involved in memory and mood function and shows impairment in schizophrenia. In the present study, we examined the regional hippocampal changes in schizophrenia patients using voxel-based morphometry (VBM), Freesurfer, and proton magnetic resonance spectroscopy (1H MRS) procedures. METHODS: 1H MRS and high-resolution T1-weighted magnetic resonance imaging were collected in both healthy control subjects (N = 28) and schizophrenia patients (N = 28) using 3-Tesla whole body MRI system...
December 11, 2017: Neuroradiology
https://www.readbyqxmd.com/read/29230059/genome-wide-association-study-of-delay-discounting-in-23-217-adult-research-participants-of-european-ancestry
#8
Sandra Sanchez-Roige, Pierre Fontanillas, Sarah L Elson, Anita Pandit, Ellen M Schmidt, Johanna R Foerster, Gonçalo R Abecasis, Joshua C Gray, Harriet de Wit, Lea K Davis, James MacKillop, Abraham A Palmer
Delay discounting (DD), the tendency to discount the value of delayed versus current rewards, is elevated in a constellation of diseases and behavioral conditions. We performed a genome-wide association study of DD using 23,127 research participants of European ancestry. The most significantly associated single-nucleotide polymorphism was rs6528024 (P = 2.40 × 10-8), which is located in an intron of the gene GPM6B. We also showed that 12% of the variance in DD was accounted for by genotype and that the genetic signature of DD overlapped with attention-deficit/hyperactivity disorder, schizophrenia, major depression, smoking, personality, cognition and body weight...
December 11, 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/29229240/brain-functional-and-perfusional-alterations-in-schizophrenia-an-arterial-spin-labeling-study
#9
Ícaro A F Oliveira, Tiago M Guimarães, Roberto M Souza, Antônio C Dos Santos, João Paulo Machado-de-Sousa, Jaime E C Hallak, Renata F Leoni
Schizophrenia is a severe mental disorder that affects the anatomy and function of the brain, with an impact on one's thoughts, feelings, and behavior. The purpose of the study was to investigate cerebral blood flow (CBF) and brain connectivity in a group of patients with schizophrenia. Pseudo-continuous arterial spin labeling (pCASL) images were acquired from 28 patients in treatment and 28 age-matched healthy controls. Mean CBF and connectivity patterns were assessed. Schizophrenia patients had decreased CBF in the bilateral frontal pole and superior frontal gyrus, right medial frontal gyrus, triangular and opercular parts of the inferior frontal gyrus, posterior division of the left supramarginal gyrus, superior and inferior divisions of the left lateral occipital cortex, and bilateral occipital pole...
December 5, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/29227584/npas4-deficiency-and-prenatal-stress-interact-to-affect-social-recognition-in-mice
#10
Kelsey Heslin, Laurence Coutellier
Neurodevelopmental disorders such as autism spectrum disorders and schizophrenia have an expansive array of reported genetic and environmental contributing factors. However, none of these factors alone can account for a substantial proportion of cases of either disorder. Instead, many gene-by-environment interactions are responsible for neurodevelopmental disturbances that lead to these disorders. The current experiment used heterozygous knock-out mice to examine a potential interaction between two factors commonly linked to neurodevelopmental disorders and cognitive deficit: imbalanced excitatory/inhibitory signaling in the cortex and prenatal stress (PNS) exposure...
December 11, 2017: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/29227583/single-point-mutation-on-the-gene-encoding-dysbindin-results-in-recognition-deficits
#11
Eric H Chang, Kayla Fernando, Lok Wan E Yeung, Kristina Barbari, Toni-Shay S Chandon, Anil K Malhotra
The dystrobrevin-binding protein 1 (DTNBP1) gene is a candidate risk factor for schizophrenia and has been associated with cognitive ability in both patient populations and healthy controls. DTNBP1 encodes dysbindin protein, which is localized to synaptic sites and is reduced in the prefrontal cortex and hippocampus of patients with schizophrenia, indicating a potential role in schizophrenia etiology. Most studies of dysbindin function have focused on the sandy (sdy) mice that lack dysbindin protein and have a wide range of abnormalities...
December 11, 2017: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/29226809/vitamin-d-supplementation-in-chronic-schizophrenia-patients-treated-with-clozapine-a-randomized-double-blind-placebo-controlled-clinical-trial
#12
Amir Krivoy, Roy Onn, Yael Vilner, Eldar Hochman, Shira Weizman, Amir Paz, Shmuel Hess, Roi Sagy, Shiri Kimhi-Nesher, Ehud Kalter, Tal Friedman, Zvi Friedman, Gil Bormant, Sharon Trommer, Avi Valevski, Abraham Weizman
BACKGROUND: While accumulating evidence suggests that vitamin D deficiency may be involved in the risk to develop schizophrenia and its outcome, there are no studies on vitamin D supplementation in this context. We sought to assess the effect of vitamin D supplementation on psychiatric, cognitive and metabolic parameters in chronic clozapine-treated schizophrenia patients. METHODS: This eight-week, randomized, double-blind, placebo-controlled clinical trial, recruited schizophrenia patients who had been maintained on clozapine treatment for at least 18weeks and had low levels of vitamin D (<75nmol/l) and total PANSS scores >70 (to ascertain the presence of residual symptoms)...
December 2, 2017: EBioMedicine
https://www.readbyqxmd.com/read/29217297/defects-in-bioenergetic-coupling-in-schizophrenia
#13
REVIEW
Courtney R Sullivan, Sinead M O'Donovan, Robert E McCullumsmith, Amy Ramsey
Synaptic neurotransmission relies on maintenance of the synapse and meeting the energy demands of neurons. Defects in excitatory and inhibitory synapses have been implicated in schizophrenia, likely contributing to positive and negative symptoms as well as impaired cognition. Recently, accumulating evidence has suggested that bioenergetic systems, important in both synaptic function and cognition, are abnormal in psychiatric illnesses such as schizophrenia. Animal models of synaptic dysfunction demonstrated endophenotypes of schizophrenia as well as bioenergetic abnormalities...
October 24, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/29217145/neurodevelopmental-synaptopathies-insights-from-behaviour-in-rodent-models-of-synapse-gene-mutations
#14
REVIEW
J Luo, R H Norris, S L Gordon, J Nithianantharajah
The genomic revolution has begun to unveil the enormous complexity and heterogeneity of the genetic basis of neurodevelopmental disorders such as such epilepsy, intellectual disability, autism spectrum disorder and schizophrenia. Increasingly, human mutations in synapse genes are being identified across these disorders. These neurodevelopmental synaptopathies highlight synaptic homeostasis pathways as a convergence point underlying disease mechanisms. Here, we review some of the key pre- and postsynaptic genes in which penetrant human mutations have been identified in neurodevelopmental disorders for which genetic rodent models have been generated...
December 4, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29216439/gender-differences-in-social-cognition-a-cross-sectional-pilot-study-of-recently-diagnosed-patients-with-schizophrenia-and-healthy-subjects
#15
Guillem Navarra-Ventura, Sol Fernandez-Gonzalo, Marc Turon, Esther Pousa, Diego Palao, Narcis Cardoner, Merce Jodar
OBJECTIVES: This study had 2 objectives: First, to explore the gender-related differences in emotional processing (EP) and theory of mind-both cognitive (CToM) and affective (AToM)-in patients with schizophrenia and in a control group of healthy subjects; and, second, to examine, from a gender perspective, the possible association between EP and CToM in the AToM performance. METHODS: Forty patients with schizophrenia/schizoaffective disorder were recruited and matched by gender, age and years of education with 40 healthy subjects...
January 1, 2017: Canadian Journal of Psychiatry. Revue Canadienne de Psychiatrie
https://www.readbyqxmd.com/read/29214908/prospective-memory-in-first-degree-relatives-of-patients-with-schizophrenia
#16
Saima Saleem, Devvarta Kumar, Ganesan Venkatasubramanian
OBJECTIVES: Among various cognitive impairments in schizophrenia, prospective memory (ProM) deficit is unequivocally established. However, there is a paucity of research examining whether ProM impairment can be considered a cognitive endophenotypic marker in schizophrenia. An important step toward this is to assess the status of ProM in first-degree relatives (FDRs) of patients with schizophrenia. Keeping this in view, present study has been conducted to assess event- and time-based ProM in FDRs of patients with schizophrenia...
December 7, 2017: Clinical Neuropsychologist
https://www.readbyqxmd.com/read/29213090/evaluation-of-short-interval-cortical-inhibition-and-intracortical-facilitation-from-the-dorsolateral-prefrontal-cortex-in-patients-with-schizophrenia
#17
Yoshihiro Noda, Mera S Barr, Reza Zomorrodi, Robin F H Cash, Faranak Farzan, Tarek K Rajji, Robert Chen, Zafiris J Daskalakis, Daniel M Blumberger
GABAergic and glutamatergic dysfunction in the dorsolateral prefrontal cortex (DLPFC) are thought to be the core pathophysiological mechanisms of schizophrenia. Recently, we have established a method to index these functions from the DLPFC using the paired transcranial magnetic stimulation (TMS) paradigms of short interval intracortical inhibition (SICI) and facilitation (ICF) combined with electroencephalography (EEG). In this study, we aimed to evaluate neurophysiological indicators related to GABAA and glutamate receptor-mediated functions respectively from the DLPFC in patients with schizophrenia using these paradigms, compared to healthy controls...
December 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29212415/effects-of-cognitive-remediation-on-cognitive-and-social-functions-in-individuals-with-schizophrenia
#18
Akihiko Katsumi, Hiroshi Hoshino, Satoshi Fujimoto, Hirooki Yabe, Emi Ikebuchi, Kazuyuki Nakagome, Shin-Ichi Niwa
Individuals with schizophrenia exhibit cognitive impairments, which are related to impairments in social functions. This study investigated the effects of cognitive remediation on cognitive, social, and daily living impairment. Participants were individuals with schizophrenia between 20 and 60 years old (N = 44). Participants were randomly assigned to two groups: a cognitive remediation intervention group and a non-intervention control group. The control group was provided with conventional drug therapy and either day care or occupational therapy...
December 7, 2017: Neuropsychological Rehabilitation
https://www.readbyqxmd.com/read/29212023/disc1-modulates-neuronal-stress-responses-by-gate-keeping-er-mitochondria-ca2-transfer-through-the-mam
#19
Sung Jin Park, Su Been Lee, Yeongjun Suh, Su-Jeong Kim, Namgyu Lee, Ji-Ho Hong, Cana Park, Youngsik Woo, Koko Ishizuka, Joung-Hun Kim, Per-Olof Berggren, Akira Sawa, Sang Ki Park
A wide range of Ca2+-mediated functions are enabled by the dynamic properties of Ca2+, all of which are dependent on the endoplasmic reticulum (ER) and mitochondria. Disrupted-in-schizophrenia 1 (DISC1) is a scaffold protein that is involved in the function of intracellular organelles and is linked to cognitive and emotional deficits. Here, we demonstrate that DISC1 localizes to the mitochondria-associated ER membrane (MAM). At the MAM, DISC1 interacts with IP3R1 and downregulates its ligand binding, modulating ER-mitochondria Ca2+ transfer through the MAM...
December 5, 2017: Cell Reports
https://www.readbyqxmd.com/read/29211814/overexpression-of-transmembrane-protein-168-in-the-mouse-nucleus-accumbens-induces-anxiety-and-sensorimotor-gating-deficit
#20
Kequan Fu, Yoshiaki Miyamoto, Kazuyuki Sumi, Eriko Saika, Shin-Ichi Muramatsu, Kyosuke Uno, Atsumi Nitta
Transmembrane protein 168 (TMEM168) comprises 697 amino acid residues, including some putative transmembrane domains. It is reported that TMEM168 controls methamphetamine (METH) dependence in the nucleus accumbens (NAc) of mice. Moreover, a strong link between METH dependence-induced adaptive changes in the brain and mood disorders has been evaluated. In the present study, we investigated the effects of accumbal TMEM168 in a battery of behavioral paradigms. The adeno-associated virus (AAV) Tmem168 vector was injected into the NAc of C57BL/6J mice (NAc-TMEM mice)...
2017: PloS One
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