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https://www.readbyqxmd.com/read/28743159/chronic-hepatitis-c-virus-infection-and-neurocognitive-function-in-adult-survivors-of-childhood-cancer
#1
Adrienne Studaway, Rohit P Ojha, Tara M Brinkman, Nan Zhang, Malek Baassiri, Pia Banerjee, Matthew J Ehrhardt, Deokumar Srivastava, Leslie L Robison, Melissa M Hudson, Kevin R Krull
BACKGROUND: Cancer survivors transfused with blood products before reliable screening for hepatitis C virus (HCV) are at risk for infection. This study examined the impact of HCV on neurocognitive function and health-related quality of life (HRQOL) among adult survivors of childhood cancer. METHODS: Neurocognitive testing was conducted for 836 adult survivors of childhood cancer (mean age, 35 years [standard deviation, 7.4 years]; time since diagnosis, 29 years [standard deviation, 6...
July 25, 2017: Cancer
https://www.readbyqxmd.com/read/28743126/frontal-cortex-and-hippocampal-%C3%AE-secretase-activating-protein-levels-in-prodromal-alzheimer-disease
#2
Sylvia E Perez, Muhammad Nadeem, Michael H Malek-Ahmadi, Bin He, Elliott J Mufson
BACKGROUND: β-Amyloid (Aβ) is the product of concerted cleavage of the amyloid precursor protein (APP) by β- and γ-secretases. However, the molecular mechanisms that regulate this process are not well understood. Recently, evidence was reported that γ-secretase activating protein (GSAP, 16 kDa), derived from a larger precursor protein (98 kDa), plays a role in Aβ metabolism through a mechanism involving its interaction with both γ-secretase and APP. However, a detailed evaluation of GSAP protein levels and their association with clinical and neuropathological variables are lacking during the clinical progression of Alzheimer disease (AD)...
July 26, 2017: Neuro-degenerative Diseases
https://www.readbyqxmd.com/read/28743056/apigenin-attenuates-isoflurane-induced-cognitive-dysfunction-via-epigenetic-regulation-and-neuroinflammation-in-aged-rats
#3
Lin Chen, Wenji Xie, Wenqin Xie, Weiqiang Zhuang, Changcheng Jiang, Naizhen Liu
PURPOSE OF THE RESEARCH: Post operational cognitive dysfunction (POCD) occurs in patients after anesthesia and surgery. Abnormal histone acetylation and neuroinflammation are key factors in the pathogenesis of cognitive impairment. Apigenin not only has an anti-inflammatory activity but also modifies histone acetylation. We aimed to investigate whether apigenin can attenuate isoflurane exposure-induced cognitive decline by regulating histone acetylation and inflammatory signaling. MATERIALS AND METHODS: Spatial learning and memory were assessed by Morris water maze test...
July 6, 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28742080/emergent-remitted-and-persistent-psychosis-spectrum-symptoms-in-22q11-2-deletion-syndrome
#4
S X Tang, T M Moore, M E Calkins, J J Yi, D M McDonald-McGinn, E H Zackai, B S Emanuel, R C Gur, R E Gur
Individuals with 22q11.2 deletion syndrome (22q11DS) are at markedly elevated risk for schizophrenia-related disorders. Stability, emergence, remission and persistence of psychosis-spectrum symptoms were investigated longitudinally. Demographic, clinical and cognitive predictors of psychosis were assessed. Prospective follow-up over 2.8 years was undertaken in 75 individuals with 22q11DS aged 8-35 years. Mood, anxiety, attention-deficit hyperactivity disorders and psychosis-spectrum symptoms were assessed with the Kiddie-Schedule for Affective Disorders and Schizophrenia and Scale of Prodromal Symptoms (SOPS)...
July 25, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28742036/study-of-temporal-effects-on-subjective-video-quality-of-experience
#5
Christos G Bampis, Zhi Li, Anush K Moorthy, Ioannis Katsavounidis, Anne Aaron, Alan C Bovik
HTTP adaptive streaming is being increasingly deployed by network content providers such as Netflix and YouTube. By dividing video content into data chunks encoded at different bitrates, a client is able to request the appropriate bitrate for the segment to be played next based on the estimated network conditions. However, this can introduce a number of impairments, including compression artifacts and rebuffering events which can severely impact an end-user's quality of experience (QoE). We have recently created a new video quality database which simulates a typical video streaming application, using long video sequences and interesting Netflix content...
July 20, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28741672/finding-of-increased-caudate-nucleus-in-patients-with-alzheimer-s-disease
#6
K Persson, V D Bohbot, N Bogdanovic, G Selbaek, A Braekhus, K Engedal
OBJECTIVES: A recently published study using an automated MRI volumetry method (NeuroQuant®) unexpectedly demonstrated larger caudate nucleus volume in patients with Alzheimer's disease dementia (AD) compared to patients with subjective and mild cognitive impairment (SCI and MCI). The aim of this study was to explore this finding. MATERIALS & METHODS: The caudate nucleus and the hippocampus volumes were measured (both expressed as ratios of intracranial volume) in a total of 257 patients with SCI and MCI according to the Winblad criteria and AD according to ICD-10 criteria...
July 25, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28741251/the-role-of-top-down-suppression-in-mitigating-the-disruptive-effects-of-task-irrelevant-feature-changes-in-visual-working-memory
#7
Andrea Bocincova, Amanda E van Lamsweerde, Jeffrey S Johnson
Studies of change detection have shown that changing the task-irrelevant features of remembered objects impairs change detection for task-relevant features, a phenomenon known as the irrelevant change effect. Although this effect is pronounced at short study-test intervals, it is eliminated at longer delays. This has prompted the proposal that although all features of attended objects are initially stored together in visual working memory (VWM), top-down control can be used to suppress task-irrelevant features over time...
July 24, 2017: Memory & Cognition
https://www.readbyqxmd.com/read/28741167/microvascular-ultrastructural-changes-precede-cognitive-impairment-in-the-murine-appswe-ps1de9-model-of-alzheimer-s-disease
#8
Patricia Kelly, Paul Denver, Simon C Satchell, Maximilian Ackermann, Moritz A Konerding, Christopher A Mitchell
Cerebral and systemic organ microvascular pathologies coexist with human Alzheimer's disease (AD) neuropathology. In this study, we hypothesised that both cerebral and systemic microvascular pathologies exist in 4- to 5-month-old male APPswe/PS1dE9 (APP/PS1) transgenic mice prior to the onset of cognitive impairment. To assess this we examined recognition memory in both wild-type and APP/PS1 mice using the object recognition task (ORT; n = 11 per group) and counted thioflavin-S-positive plaques in brain (n = 6 per group)...
July 25, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28741085/the-effect-of-sleep-deprivation-on-retrieval-of-emotional-memory-a-behavioural-study-using-film-stimuli
#9
Daniela Tempesta, Valentina Socci, Giada Dello Ioio, Luigi De Gennaro, Michele Ferrara
Although the deleterious effects of sleep deprivation on memory consolidation are well documented, it is still unclear how the facilitating effect of emotions on memory consolidation processes could be modulated by the lack of sleep. In this study, we investigated the effects of sleep deprivation on episodic memory using emotional and non-emotional film stimuli. Forty-eight healthy subjects, divided into a sleep group (SG) and a sleep-deprived (SD) group, completed an Encoding and a Recall phase. Participants in the SD group were sleep deprived the night immediately following the Encoding phase, whereas the control group slept at home...
July 24, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28740826/epicog-sch-a-brief-battery-to-screen-cognitive-impact-of-schizophrenia-in-stable-outpatients
#10
Silvia Zaragoza Domingo, Julio Bobes, Maria-Paz García-Portilla, Claudia Morralla
Brief batteries in schizophrenia, are needed to screen for the cognitive impact of schizophrenia. We aimed to validate and co-norm the Epidemiological Study of Cognitive Impairment in Schizophrenia (EPICOG-SCH) derived brief cognitive battery. A cross-sectional outpatient evaluation was conducted of six-hundred-seventy-two patients recruited from 234 centers. The brief battery included well-known subtests available worldwide that cover cognitive domains related to functional outcomes: WAIS-III-Letter-Number-Sequencing-LNS, Category Fluency Test-CFT, Logical-Memory Immediate Recall-LM, and Digit-Symbol-Coding-DSC...
June 2017: Schizophrenia Research. Cognition
https://www.readbyqxmd.com/read/28740823/is-performance-on-probed-serial-recall-tasks-in-schizophrenia-related-to-duration-of-attentional-blink
#11
David P McAllindon, Philip G Tibbo, Gail A Eskes
Schizophrenia is associated with a deficit in working memory, with the degree of working memory impairment related to the level of social and occupational functioning. This study tests the hypothesis that the working memory deficits in individuals with schizophrenia can be explained by slow processing of visual stimuli, as measured by the attentional blink (AB) task. Individuals with schizophrenia (SC) and controls (HC) were recruited from an early intervention service for psychosis and the local community...
March 2017: Schizophrenia Research. Cognition
https://www.readbyqxmd.com/read/28740817/impaired-retrieval-processes-evident-during-visual-working-memory-in-schizophrenia
#12
Peter A Lynn, Seung Suk Kang, Scott R Sponheim
Prominent working memory (WM) deficits have been observed in people with schizophrenia (PSZ) across multiple sensory modalities, including the visuospatial realm. Electrophysiological abnormalities noted during early visual processing as well as later cognitive functions in PSZ may underlie deficiencies in WM ability, though the mechanisms linking behavior to neural responses are not well understood. WM dysfunction has also been observed in biological relatives of PSZ (REL) and therefore may be a manifestation of genetic liability for the disorder...
September 2016: Schizophrenia Research. Cognition
https://www.readbyqxmd.com/read/28740815/positive-schizotypy-and-negative-schizotypy-are-associated-with-differential-patterns-of-episodic-memory-impairment
#13
Lili Sahakyan, Thomas R Kwapil
Cognitive impairment is a hallmark of schizophrenia; however, studies have not comprehensively examined such impairments in non-clinically ascertained schizotypic young adults. The present study employed a series of measures to assess episodic memory in high positive schizotypy, high negative schizotypy, and comparison groups (each group n = 25). Consistent with diminished cognitive functioning seen in negative symptom schizophrenia, the negative schizotypy group exhibited deficits on free recall, recognition, and source memory tasks...
September 2016: Schizophrenia Research. Cognition
https://www.readbyqxmd.com/read/28740472/the-benefits-of-working-memory-capacity-on-attentional-control-under-pressure
#14
Xiaoxiao Luo, Liwei Zhang, Jin Wang
The present study aimed to examine the effects of working memory capacity (WMC) and state anxiety (SA) on attentional control. WMC was manipulated by (a) dividing participants into low- and high-WMC groups (Experiment 1), and (b) using working memory training to improve WMC (Experiment 2). SA was manipulated by creating low- and high-SA conditions. Attentional control was evaluated by using antisaccade task. Results demonstrated that (a) higher WMC indicated better attentional control (Experiments 1 and 2); (b) the effects of SA on attentional control were inconsistent because SA impaired attentional control in Experiment 1, but favored attentional control in Experiment 2; and (c) the interaction of SA and WMC was not significant (Experiments 1 and 2)...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28739640/egcg-ameliorates-high-fat-and-high-fructose-induced-cognitive-defects-by-regulating-the-irs-akt-and-erk-creb-bdnf
#15
Yashi Mi, Guoyuan Qi, Rong Fan, Qinglian Qiao, Yali Sun, Yuqi Gao, Xuebo Liu
Obesity, which is caused by an energy imbalance between calorie intake and consumption, has become a major international health burden. Obesity increases the risk of insulin resistance and age-related cognitive decline, accompanied by peripheral inflammation. (-)-Epigallocatechin-3-gallate (EGCG), the major polyphenol in green tea, possesses antioxidant, anti-inflammatory, and cardioprotective activities; however, few reports have focused on its potential effect on cognitive disorders. In this study, our goal was to investigate the protective effects of EGCG treatment on insulin resistance and memory impairment induced by a high-fat and high-fructose diet (HFFD)...
July 24, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28739524/social-instability-stress-in-adolescent-male-rats-reduces-social-interaction-and-social-recognition-performance-and-increases-oxytocin-receptor-binding
#16
Travis E Hodges, Jennet L Baumbach, Marina L Marcolin, Remco Bredewold, Alexa H Veenema, Cheryl M McCormick
Social experiences in adolescence are essential for displaying context-appropriate social behaviours in adulthood. We previously found that adult male rats that underwent social instability stress (SS) in adolescence had reduced social interactions with unfamiliar peers compared with non-stressed controls (CTL). Here we determined whether SS altered social recognition and social reward and brain oxytocin and vasopressin receptor density in adolescence. We confirmed that SS rats spent less time interacting with unfamiliar peers than did CTL rats (p = 0...
July 21, 2017: Neuroscience
https://www.readbyqxmd.com/read/28739493/association-between-sarcopenia-and-mild-cognitive-impairment-using-the-japanese-version-of-the-sarc-f-in-elderly-patients-with-diabetes
#17
Satoshi Ida, Mari Nakai, Sho Ito, Yuki Ishihara, Kanako Imataka, Akihiro Uchida, Kou Monguchi, Ryutaro Kaneko, Ryoko Fujiwara, Hiroka Takahashi, Kazuya Murata
OBJECTIVES: The purpose of this study was to investigate the association between sarcopenia and mild cognitive impairment (MCI) in elderly patients with diabetes using the Japanese version of the simple 5-item questionnaire (SARC-F-J). DESIGN: Cross-sectional study. SETTING: Community hospital in Japan. PARTICIPANTS: Subjects were people with diabetes aged 65 years and older being treated on an outpatient basis at the Ise Red Cross Hospital...
July 21, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28739487/the-ros-mediated-activation-of-il-6-stat3-signaling-pathway-is-involved-in-the-27-hydroxycholesterol-induced-cellular-senescence-in-nerve-cells
#18
Jiao Liu, Yun Liu, Juan Chen, Chunyan Hu, Mengying Teng, Kailin Jiao, Zhaoxia Shen, Dongmei Zhu, Jia Yue, Zhong Li, Yuan Li
The oxysterol 27-hydroxycholesterol (27HC) is a selective estrogen receptor modulator (SERMs), which like endogenous estrogen 17β-estradiol (E2) induces the proliferation of ER-positive breast cancer cells in vitro. Interestingly, the observation that 27HC induces adverse effects in neural system, distinguishing it from E2. It has been suggested that high levels of circulating cholesterol increase the entry of 27HC into the brain, which may induce learning and memory impairment. Based on this evidence, 27HC may be associated with neurodegenerative processes and interrupted cholesterol homeostasis in the brain...
July 21, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28739376/functional-inactivation-of-dorsal-medial-striatum-alters-behavioral-flexibility-and-recognition-process-in-mice
#19
Yanhua Qiao, Xingyue Wang, Lian Ma, Shengguang Li, Jing Liang
Deficits in behavioral flexibility and recognition memory are commonly observed in mental illnesses and neurodegenerative diseases. Abnormality of the striatum has been implicated in an association with the pathology of these diseases. However, the exact roles of striatal heterogeneous structures in these cognitive functions are still unknown. In the present study, we investigated the effects of suppressing neuronal activity in the dorsomedial striatum (DMStr) and nucleus accumbens core (NAcC) on reversal learning and novelty recognition in mice...
July 21, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28739248/the-protective-effect-of-hydrogen-sulfide-h2s-on-traumatic-brain-injury-tbi-induced-memory-deficits-in-rats
#20
Seyed Asaad Karimi, Narges Hosseinmardi, Mahyar Janahmadi, Mohammad Sayyah, Razieh Hajisoltani
Traumatic brain injury (TBI), as an expanding public health epidemic, is a common cause of death among youth. TBI is associated with cognitive deficits and memory impairment. Hydrogen sulfide (H2S), a novel gaseous mediator, has been recognized as an important neuromodulator and neuroprotective agent in the central nervous system. In the present study the potential neuroprotective role of sodium hydrosulfide (NaHS), an H2S donor on TBI induced memory deficit in a rat model of controlled cortical impact (CCI) injury was investigated...
July 21, 2017: Brain Research Bulletin
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