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https://www.readbyqxmd.com/read/29776894/amyloid-pet-in-neurodegenerative-diseases-with-dementia
#1
V Camacho, A Gómez-Grande, P Sopena, D García-Solís, M Gómez Río, C Lorenzo, S Rubí, J Arbizu
Alzheimer's disease (AD) is a neurodegenerative condition characterized by progressive cognitive decline and memory loss, and is the most common form of dementia. Amyloid plaques with neurofibrillary tangles are a neuropathological hallmark of AD that produces synaptic dysfunction and culminates later in neuronal loss. Amyloid PET is a useful, available and non-invasive technique that provides in vivo information about the cortical amyloid burden. In the latest revised criteria for the diagnosis of AD biomarkers were defined and integrated: pathological and diagnostic biomarkers (increased retention on fibrillar amyloid PET or decreased Aβ1-42 and increased T-Tau or P-Tau in CSF) and neurodegeneration or topographical biomarkers (temporoparietal hypometabolism on 18 F-FDG PET and temporal atrophy on MRI)...
May 15, 2018: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/29774776/memory-deficit-in-an-object-location-task-after-mild-tbi-is-associated-with-impaired-early-object-exploration-and-both-are-restored-by-branched-chain-amino-acid-dietary-therapy
#2
Rosalia Paterno, Hannah Metheny, Akiva S Cohen
The relation between traumatic brain injury (TBI) and memory dysfunction is well established, yet imprecise. Here, we investigate whether mild TBI causes a specific deficit in spatial episodic memory. Fifty-eight (29 TBI, 29 Sham) mice were run in a spatial recognition task. To determine which phase of memory might be affected in our task, we assessed rodent performance at three different delay times (3 min, 1 hour, and 24 hours). We found that sham and TBI mice performed equally well at 3 minutes, but TBI mice had significantly impaired spatial recognition memory after a delay time of one hour...
May 18, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29772021/analysis-of-risk-factors-for-mild-cognitive-impairment-based-on-word-list-memory-test-results-and-questionnaire-responses-in-healthy-japanese-individuals-registered-in-an-online-database
#3
Masayo Ogawa, Daichi Sone, Kazushi Maruo, Hiroyuki Shimada, Keisuke Suzuki, Hiroshi Watanabe, Hiroshi Matsuda, Hidehiro Mizusawa
Although the development of effective therapeutic drugs and radical treatment options for dementia and Alzheimer's disease (AD) remains urgent, progress in recent clinical trials of AD drugs has been less than adequate. In order to advance the progress of clinical trials, it is necessary to establish more efficient methods of recruitment. In Japan, there are registration systems stratified by mild cognitive impairment and preclinical and clinical stages of early and advanced stage dementia, but there is no registration system for healthy individuals yet...
2018: PloS One
https://www.readbyqxmd.com/read/29771474/neurocog-fx-study-a-multicenter-cohort-study-on-cognitive-dysfunction-in-patients-with-early-breast-cancer
#4
Oliver Rick, Monika Reuß-Borst, Timm Dauelsberg, Holger Hass, Volker König, Reiner Caspari, Gabriele Götz-Keil, Jürgen Pfitzner, Christa Kerschgens, Klaus Fliessbach, Christian Hoppe
OBJECTIVE: Complaints about cognitive dysfunction (CD) reportedly persist in approximately one third of breast cancer patients but the nature of CD and possible risk factors are unknown. METHODS: A cross-sectional, multicenter study was set-up at 9 German oncological rehabilitation centers. Objective cognitive performance was assessed by the NeuroCog FX test, a short computerized screening (duration <30 min) which assesses working memory, alertness, verbal/figural memory and language/executive...
May 17, 2018: Psycho-oncology
https://www.readbyqxmd.com/read/29768473/impaired-serial-ordering-in-nondemented-patients-with-mild-parkinson-s-disease
#5
Jinghong Ma, Shaoyang Ma, Haiqiang Zou, Yizhi Zhang, Piu Chan, Zheng Ye
The ability to arrange thoughts and actions in an appropriate serial order (the problem of serial order) is essential to complex behaviors such as language, reasoning and cognitive planning. Patients with Parkinson's disease (PD) perform poorly in tasks that rely on the successful rearrangement of working memory representations. We hypothesized that serial ordering is impaired in nondemented patients with mild PD. We recruited 49 patients with mild idiopathic PD (Hoehn and Yahr Scale 1-2.5) and 51 matched healthy adults...
2018: PloS One
https://www.readbyqxmd.com/read/29766579/memory-complaints-in-amnestic-mild-cognitive-impairment-more-prospective-or-retrospective
#6
REVIEW
Alexandre de Mendonça, Helena Felgueiras, Ana Verdelho, Sara Câmara, Cláudia Grilo, João Maroco, Antonina Pereira, Manuela Guerreiro
OBJECTIVE: Patients with amnestic Mild Cognitive Impairment (aMCI), usually considered an early stage of Alzheimer's disease, have deficits not only in retrospective memory (RM), that is, recalling of past events, words or people, but also on prospective memory (PM), the cognitive ability of remembering to execute delayed intentions in the future. This study investigated whether patients with aMCI refer more PM complaints as compared with RM complaints, and whether this might depend upon short-term vs long-term items or time-based vs event-based tasks...
May 15, 2018: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/29764279/the-modified-telephone-administered-minnesota-cognitive-acuity-screen-for-mild-cognitive-impairment
#7
Sarah Pillemer, George D Papandonatos, Cara Crook, Brian R Ott, Geoffrey Tremont
OBJECTIVE: This study aimed to compare the sensitivity and specificity of a modified version of the Minnesota Cognitive Acuity Screen (MCAS-m), by adding learning and recognition memory components, to the original version MCAS to distinguish amnestic mild cognitive impairment (aMCI) from healthy controls (HCs). METHODS/DESIGN: A total of 30 individuals with aMCI and 30 HCs underwent neuropsychological testing, neurologic examination, laboratory, and brain imaging tests...
January 1, 2018: Journal of Geriatric Psychiatry and Neurology
https://www.readbyqxmd.com/read/29759084/sex-differences-in-associations-between-maternal-deprivation-and-alterations-in-hippocampal-calcium-binding-proteins-and-cognitive-functions-in-rats
#8
Hongyu Xu, Yuqin Ye, Yelu Hao, Fei Shi, Zhiqiang Yan, Guohao Yuan, Yuefan Yang, Zhou Fei, Xiaosheng He
BACKGROUND AND OBJECTIVE: Adverse early-life experiences have been suggested as one of the key contributors to neurodevelopmental disorders, such that these experiences influence brain development, cognitive ability and mental health. Previous studies indicated that hippocampal levels of the calcium-binding proteins calretinin (CALR) and calbindin-D28k (CALB) changed in response to maternal deprivation (MD), a model for adverse early-life experiences. We investigated the effects of MD on hippocampal CALR and CALB protein levels and cognitive behaviors, and explored whether these effects were sex-related...
May 15, 2018: Behavioral and Brain Functions: BBF
https://www.readbyqxmd.com/read/29755326/transient-hypothyroidism-during-lactation-arrests-myelination-in-the-anterior-commissure-of-rats-a-magnetic-resonance-image-and-electron-microscope-study
#9
Federico S Lucia, Jesús Pacheco-Torres, Susana González-Granero, Santiago Canals, María-Jesús Obregón, José M García-Verdugo, Pere Berbel
Thyroid hormone deficiency at early postnatal ages affects the cytoarchitecture and function of neocortical and telencephalic limbic areas, leading to impaired associative memory and in a wide spectrum of neurological and mental diseases. Neocortical areas project interhemispheric axons mostly through the corpus callosum and to a lesser extent through the anterior commissure (AC), while limbic areas mostly project through the AC and hippocampal commissures. Functional magnetic resonance data from children with late diagnosed congenital hypothyroidism and abnormal verbal memory processing, suggest altered ipsilateral and contralateral telencephalic connections...
2018: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/29747584/differentiation-of-neuropsychological-features-between-posterior-cortical-atrophy-and-early-onset-alzheimer-s-disease
#10
Jieying Li, Liyong Wu, Yi Tang, Aihong Zhou, Fen Wang, Yi Xing, Jianping Jia
BACKGROUND: Posterior cortical atrophy (PCA) is a group of clinical syndromes characterized by visuospatial and visuoperceptual impairment, with memory relatively preserved. Although PCA is pathologically almost identical to Alzheimer's disease (AD), they have different cognitive features. Those differences have only rarely been reported in any Chinese population. The purpose of the study is to establish neuropsychological tests that distinguish the clinical features of PCA from early onset AD (EOAD)...
May 10, 2018: BMC Neurology
https://www.readbyqxmd.com/read/29746524/evaluating-verbal-learning-and-memory-in-patients-with-an-at-risk-mental-state-or-first-episode-psychosis-using-structural-equation-modelling
#11
Laura Egloff, Erich Studerus, Ronan Zimmermann, Ulrike Heitz, Stephanie Menghini-Müller, Sarah Ittig, Katharina Beck, Christina Andreou, Stefan Borgwardt, Anita Riecher-Rössler
BACKGROUND: Verbal learning and memory are impaired not only in patients with a first episode of psychosis (FEP) but also-to a lower extent-in those with an at-risk mental state for psychosis (ARMS). However, little is known about the specific nature of these impairments. Hence, we aimed to study learning and memory processes in ARMS and FEP patients by making use of structural equation modelling. METHODS: Verbal learning was assessed with the California Verbal Learning Test (CVLT) in 98 FEP patients, 126 ARMS patients and 68 healthy controls (HC) as part of the Basel early detection of psychosis (FePsy) study...
2018: PloS One
https://www.readbyqxmd.com/read/29740308/cyclosporin-a-mediated-activation-of-endogenous-neural-precursor-cells-promotes-cognitive-recovery-in-a-mouse-model-of-stroke
#12
Labeeba Nusrat, Jessica M Livingston-Thomas, Vaakiny Raguthevan, Kelsey Adams, Ilan Vonderwalde, Dale Corbett, Cindi M Morshead
Cognitive dysfunction following stroke significantly impacts quality of life and functional independance; yet, despite the prevalence and negative impact of cognitive deficits, post-stroke interventions almost exclusively target motor impairments. As a result, current treatment options are limited in their ability to promote post-stroke cognitive recovery. Cyclosporin A (CsA) has been previously shown to improve post-stroke functional recovery of sensorimotor deficits. Interestingly, CsA is a commonly used immunosuppressant and also acts directly on endogenous neural precursor cells (NPCs) in the neurogenic regions of the brain (the periventricular region and the dentate gyrus)...
2018: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29739127/diagnostic-validity-of-an-automated-probabilistic-tractography-in-amnestic-mild-cognitive-impairment
#13
Won Sang Jung, Yoo Hyun Um, Dong Woo Kang, Chang Uk Lee, Young Sup Woo, Won-Myong Bahk, Hyun Kook Lim
Objective: Although several prior works showed the white matter (WM) integrity changes in amnestic mild cognitive impairment (aMCI) and Alzheimer's disease, it is still unclear the diagnostic accuracy of the WM integrity measurements using diffusion tensor imaging (DTI) in discriminating aMCI from normal controls. The aim of this study is to explore diagnostic validity of whole brain automated probabilistic tractography in discriminating aMCI from normal controls. Methods: One hundred-two subjects (50 aMCI and 52 normal controls) were included and underwent DTI scans...
May 31, 2018: Clinical Psychopharmacology and Neuroscience: the Official Scientific Journal of the Korean College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29736736/the-medial-septum-is-insulin-resistant-in-the-ad-presymptomatic-phase-rescue-by-nerve-growth-factor-driven-irs-1-activation
#14
Valentina Sposato, Nadia Canu, Elena Fico, Salvatore Fusco, Giulia Bolasco, Maria Teresa Ciotti, Matteo Spinelli, Delio Mercanti, Claudio Grassi, Viviana Triaca, Pietro Calissano
Basal forebrain cholinergic neurons (BFCN) are key modulators of learning and memory and are high energy-demanding neurons. Impaired neuronal metabolism and reduced insulin signaling, known as insulin resistance, has been reported in the early phase of Alzheimer's disease (AD), which has been suggested to be "Type 3 Diabetes." We hypothesized that BFCN may develop insulin resistance and their consequent failure represents one of the earliest event in AD. We found that a condition reminiscent of insulin resistance occurs in the medial septum of 3 months old 3×Tg-AD mice, reported to develop typical AD histopathology and cognitive deficits in adulthood...
May 7, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29729322/methamphetamine-augment-hiv-1-tat-mediated-memory-deficits-by-altering-the-expression-of-synaptic-proteins-and-neurotrophic-factors
#15
Anantha Ram Nookala, Daniel C Schwartz, Nitish S Chaudhari, Alexy Glazyrin, Edward B Stephens, Nancy E J Berman, Anil Kumar
Methamphetamine (METH) abuse is common among individuals infected with HIV-1 and has been shown to affect HIV replication and pathogenesis. These HIV-1 infected individuals also exhibit greater neuronal injury and higher cognitive decline. HIV-1 proteins, specifically gp120 and HIV-1 Tat, have been earlier shown to affect neurocognition. HIV-1 Tat, a viral protein released early during HIV-1 replication, contributes to HIV-associated neurotoxicity through various mechanisms including production of pro-inflammatory cytokines, reactive oxygen species and dysregulation of neuroplasticity...
May 2, 2018: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29729246/oligodendrocyte-specific-loss-of-cdk5-disrupts-the-architecture-of-nodes-of-ranvier-as-well-as-learning-and-memory
#16
Fucheng Luo, Jessie Zhang, Kathryn Burke, Rita R Romito-DiGiacomo, Robert H Miller, Yan Yang
Myelination of the central nervous system is important for normal motor and sensory neuronal function and recent studies also link it to efficient learning and memory. Cyclin-dependent kinase 5 (Cdk5) is required for normal oligodendrocyte development, myelination and myelin repair. Here we show that conditional deletion of Cdk5 by targeting with CNP (CNP;Cdk5 CKO) results in hypomyelination and disruption of the structural integrity of Nodes of Ranvier. In addition, CNP;Cdk5 CKO mice exhibited a severe impairment of learning and memory compared to controls that may reflect perturbed neuron-glial interactions...
May 2, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29727709/dorsolateral-prefrontal-cortex-bridges-bilateral-primary-somatosensory-cortices-during-cross-modal-working-memory
#17
Di Zhao, Yixuan Ku
Neural activity in the dorsolateral prefrontal cortex (DLPFC) has been suggested to integrate information from distinct sensory areas. However, how the DLPFC interacts with the bilateral primary somatosensory cortices (SIs) in tactile-visual cross-modal working memory has not yet been established. In the present study, we applied single-pulse transcranial magnetic stimulation (sp-TMS) over the contralateral DLPFC and bilateral SIs of human participants at various time points, while they performed a tactile-visual delayed matching-to-sample task with a 2-second delay...
May 1, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29723266/recognition-of-early-stage-thigmotaxis-in-morris-water-maze-test-with-convolutional-neural-network
#18
Akinori Higaki, Masaki Mogi, Jun Iwanami, Li-Juan Min, Hui-Yu Bai, Bao-Shuai Shan, Harumi Kan-No, Shuntaro Ikeda, Jitsuo Higaki, Masatsugu Horiuchi
The Morris water maze test (MWM) is a useful tool to evaluate rodents' spatial learning and memory, but the outcome is susceptible to various experimental conditions. Thigmotaxis is a commonly observed behavioral pattern which is thought to be related to anxiety or fear. This behavior is associated with prolonged escape latency, but the impact of its frequency in the early stage on the final outcome is not clearly understood. We analyzed swim path trajectories in male C57BL/6 mice with or without bilateral common carotid artery stenosis (BCAS) treatment...
2018: PloS One
https://www.readbyqxmd.com/read/29716643/tdp-43-pathology-in-anterior-temporal-pole-cortex-in-aging-and-alzheimer-s-disease
#19
Sukriti Nag, Lei Yu, Patricia A Boyle, Sue E Leurgans, David A Bennett, Julie A Schneider
TDP-43 pathology was investigated in the anterior temporal pole cortex (ATPC) and orbital frontal cortex (OFC), regions often degenerated in frontotemporal lobar degenerations (FTLD), in aging and Alzheimer's disease (AD). Diagnosis of dementia in the 1160 autopsied participants from 3 studies of community-dwelling elders was based on clinical evaluation and cognitive performance tests which were used to create summary measures of the five cognitive domains. Neuronal and glial TDP-43 cytoplasmic inclusions were quantitated in 8 brain regions by immunohistochemistry, and used in ANOVA and regression analyses...
May 1, 2018: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/29713339/exercise-intervention-associated-with-cognitive-improvement-in-alzheimer-s-disease
#20
REVIEW
Meng Ying Cui, Yang Lin, Ji Yao Sheng, Xuewen Zhang, Ran Ji Cui
Alzheimer's disease (AD) is a progressive neurodegenerative disease with the syndrome of cognitive and functional decline. Pharmacotherapy has always been in a dominant position for the treatment of AD. However, in most cases, drug therapy is accompanied with clinical delays when older adults have suffered from cognitive decline in episodic memory, working memory, and executive function. On the other hand, accumulating evidence suggests that exercise intervention may ameliorate the progression of cognitive impairment in aging ones while the standard strategy is lacking based on different levels of cognitive decline especially in mild cognitive impairment (MCI) and AD...
2018: Neural Plasticity
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