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https://www.readbyqxmd.com/read/28441758/acteoside-and-isoacteoside-protect-amyloid-%C3%AE-peptide-induced-cytotoxicity-cognitive-deficit-and-neurochemical-disturbances-in-vitro-and-in-vivo
#1
Young-Ji Shiao, Muh-Hwan Su, Hang-Ching Lin, Chi-Rei Wu
Acteoside and isoacteoside, two phenylethanoid glycosides, coexist in some plants. This study investigates the memory-improving and cytoprotective effects of acteoside and isoacteoside in amyloid β peptide 1-42 (Aβ 1-42)-infused rats and Aβ 1-42-treated SH-SY5Y cells. It further elucidates the role of amyloid cascade and central neuronal function in these effects. Acteoside and isoacteoside ameliorated cognitive deficits, decreased amyloid deposition, and reversed central cholinergic dysfunction that were caused by Aβ 1-42 in rats...
April 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28441649/home-based-physical-behavior-in-late-stage-parkinson-disease-dementia-differences-between-cognitive-subtypes
#2
Bernhard Cerff, Walter Maetzler, Patricia Sulzer, Malte Kampmeyer, Jos Prinzen, Markus A Hobert, Dominik Blum, Rob van Lummel, Silvia Del Din, Susanne Gräber, Daniela Berg, Inga Liepelt-Scarfone
BACKGROUND: For the early diagnosis of Parkinson disease dementia (PDD), objective home-based tools are needed to quantify even mild stages of dysfunction of the activities of daily living (ADL). OBJECTIVES: In this pilot study, home-based physical behavior was assessed to examine whether it is possible to distinguish mild cognitive impairment (PD-MCI) from PDD. METHODS: Fifty-five patients with mild to severe Parkinson disease (PD) participated in this cross-sectional study...
April 26, 2017: Neuro-degenerative Diseases
https://www.readbyqxmd.com/read/28440221/nptx2-and-cognitive-dysfunction-in-alzheimer-s-disease
#3
Mei-Fang Xiao, Desheng Xu, Michael T Craig, Kenneth A Pelkey, Chun-Che Chien, Yang Shi, Juhong Zhang, Susan Resnick, Olga Pletnikova, David Salmon, James Brewer, Steven Edland, Jerzy Wegiel, Benjamin Tycko, Alena Savonenko, Roger H Reeves, Juan C Troncoso, Chris J McBain, Douglas Galasko, Paul F Worley
Memory loss in Alzheimer's disease (AD) is attributed to pervasive weakening and loss of synapses. Here, we present findings supporting a special role for excitatory synapses connecting pyramidal neurons of the hippocampus and cortex with fast-spiking parvalbumin (PV) interneurons that control network excitability and rhythmicity. Excitatory synapses on PV interneurons are dependent on the AMPA receptor subunit GluA4, which is regulated by presynaptic expression of the synaptogenic immediate early gene NPTX2 by pyramidal neurons...
March 23, 2017: ELife
https://www.readbyqxmd.com/read/28437758/balance-impairment-in-kidney-transplant-recipients-without-concurrent-peripheral-neuropathy
#4
T Zanotto, S Gobbo, V Bullo, B Vendramin, F Duregon, L Cugusi, A Di Blasio, L Furian, C Silvestre, D Neunhaeuserer, M Zaccaria, M Bergamin, A Ermolao
Kidney transplant recipients (KTRs) present with compromised functional capacity, low levels of physical activity, muscle atrophy, and peripheral nerve dysfunction that may result in high postural instability. This study aimed to compare the static balance control of 19 KTRs with 19 healthy adults (HA). All participants completed the Romberg test on a stabilometric platform with eyes open (EO), eyes closed (EC) and during a dual task (DT) condition. Centre of pressure (COP) measures (COP velocity (COPv) and sway area (SA)), as well as position-based outcomes such as anterior-posterior (AP) and medio-lateral (ML) ranges of COP displacements were recorded...
April 15, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28437207/persistent-delirium-in-chronic-critical-illness-as-a-prodrome-syndrome-before-death
#5
Anna DeForest, Craig D Blinderman
BACKGROUND: Chronic critical illness (CCI) patients have poor functional outcomes, high risk of mortality, and significant sequelae, including delirium and cognitive dysfunction. The prognostic significance of persistent delirium in patients with CCI has not been well described. OBJECTIVE: We report a case of a patient with CCI following major cardiac surgery who was hemodynamically stable following a long course in the cardiothoracic intensive care unit (CTICU), but had persistent and unremitting delirium...
February 21, 2017: Journal of Palliative Medicine
https://www.readbyqxmd.com/read/28437056/psychotic-and-bipolar-disorders-schizophrenia
#6
Alaina L Edmunds
Schizophrenia is the most common psychotic illness, typically appearing between the late teenage years and the mid-30s. The first episode of psychosis may be preceded by a prodromal period. Schizophrenia symptoms fall into six common symptom clusters: delusions and hallucinations, disorganization of speech, cognitive dysfunction, negative symptoms, affective symptoms, and motor system abnormalities. The diagnosis is based on criteria in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, including exclusion of other possible medical or psychiatric etiologies of psychosis...
April 2017: FP Essentials
https://www.readbyqxmd.com/read/28435670/type-1-metabotropic-glutamate-receptor-signaling-in-cerebellar-purkinje-cells-in-health-and-disease
#7
REVIEW
Masanobu Kano, Takaki Watanabe
The cerebellum is a brain structure involved in coordination, control, and learning of movements, as well as certain aspects of cognitive function. Purkinje cells are the sole output neurons from the cerebellar cortex and therefore play crucial roles in the overall function of the cerebellum. The type-1 metabotropic glutamate receptor (mGluR1) is a key "hub" molecule that is critically involved in the regulation of synaptic wiring, excitability, synaptic response, and synaptic plasticity of Purkinje cells. In this review, we aim to highlight how mGluR1 controls these events in Purkinje cells...
2017: F1000Research
https://www.readbyqxmd.com/read/28435339/compulsive-exercise-links-risks-and-challenges-facedent
#8
REVIEW
Mia Beck Lichtenstein, Cecilie Juul Hinze, Bolette Emborg, Freja Thomsen, Simone Daugaard Hemmingsen
Compulsive exercise is a condition described since 1970s. It is characterized by a craving for physical training, resulting in uncontrollable excessive exercise behavior with harmful consequences, such as injuries and impaired social relations. It has not been accepted as a mental disorder in either International Classification of Diseases or Diagnostic and Statistical Manual of Mental Disorders. The aim of this literature review was to critically examine the research on links (comorbidity), risks (negative consequences), and challenges faced (problems in a treatment context)...
2017: Psychology Research and Behavior Management
https://www.readbyqxmd.com/read/28435052/neurovascular-neuroenergetic-coupling-axis-in-the-brain-master-regulation-by-nitric-oxide-and-consequences-in-aging-and-neurodegeneration
#9
REVIEW
Cátia F Lourenço, Ana Ledo, Rui M Barbosa, João Laranjinha
The strict energetic demands of the brain require that nutrient supply and usage be fine-tuned in accordance with the specific temporal and spatial patterns of ever-changing levels of neuronal activity. This is achieved by adjusting local cerebral blood flow (CBF) as a function of activity level - neurovascular coupling - and by changing how energy substrates are metabolized and shuttled amongst astrocytes and neurons - neuroenergetic coupling. Both activity-dependent increase of CBF and O2 and glucose utilization by active neural cells are inextricably linked, establishing a functional metabolic axis in the brain, the neurovascular-neuroenergetic coupling axis...
April 20, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28434616/impaired-tuning-of-neural-ensembles-and-the-pathophysiology-of-schizophrenia-a-translational-and-computational-neuroscience-perspective
#10
REVIEW
John H Krystal, Alan Anticevic, Genevieve J Yang, George Dragoi, Naomi R Driesen, Xiao-Jing Wang, John D Murray
The functional optimization of neural ensembles is central to human higher cognitive functions. When the functions through which neural activity is tuned fail to develop or break down, symptoms and cognitive impairments arise. This review considers ways in which disturbances in the balance of excitation and inhibition might develop and be expressed in cortical networks in association with schizophrenia. This presentation is framed within a developmental perspective that begins with disturbances in glutamate synaptic development in utero...
May 15, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/28434243/-clinical-and-neuropathological-characteristics-of-dementia-with-lewy-bodies
#11
János Bencze, Viktória Simon, Erika Bereczki, Réka Majer, Gréta Varkoly, Balázs Murnyák, János Kálmán, Tibor Hortobágyi
Dementia with Lewy bodies (DLB) is the second most common neurodegenerative dementia. The accurate diagnosis is often possible only by neuropathological examination. The morphologic hallmarks are the presence of α-synuclein-rich Lewy bodies and Lewy neurites, identical to those seen in Parkinson's disease (PD) and Parkinson's disease dementia (PDD). Neurotransmitter deficits, synaptic and ubiquitin-proteasome system (UPS) dysfunction play major role in the pathomechanism. Characteristic symptoms are cognitive fluctuation, parkinsonism and visual hallucinations...
April 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28434163/biomarkers-of-epileptogenesis-the-focus-on-glia-and-cognitive-dysfunctions
#12
Annamaria Vezzani, Rosaria Pascente, Teresa Ravizza
The need to find measures that reliably predict the onset of epilepsy after injurious events or how the patient will respond to anti-seizure drugs led to intensive pre-clinical and clinical research to discover non-invasive biomarkers that could increase the sensitivity of existing clinical indicators. The use of experimental models of epileptogenesis and of drug-resistance is instrumental to select the most promising approaches to explore such biomarkers in the pre-clinical setting for further clinical validation...
April 22, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28433855/the-electrophysiology-of-neurohiv-a-systematic-review-of-eeg-and-meg-studies-in-people-with-hiv-infection-since-the-advent-of-highly-active-antiretroviral-therapy
#13
Ana Lucia Fernández-Cruz, Lesley K Fellows
OBJECTIVE: The Human Immunodeficiency Virus (HIV) has an impact on the brain, even when the infection is well-controlled with modern highly-active antiretroviral therapy (HAART). While dementia is rare in those on HAART, milder cognitive impairment is common. The causes, patterns, and evolution of brain dysfunction in people living with HIV remain uncertain. We evaluate whether electrophysiological methods provide informative measures of brain dysfunction in this population. METHODS: A systematic literature search identified studies that used EEG or MEG to evaluate persons living with HIV published between 1996 (when HAART became available) and 2016...
March 31, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28433649/chronic-nicotine-attenuates-behavioral-and-synaptic-plasticity-impairments-in-a-streptozotocin-model-of-alzheimer-s-disease
#14
Esteves Im, Lopes-Aguiar C, Rossignoli Mt, Ruggiero Rn, Broggini Acs, Bueno-Junior Ls, Kandratavicius L, Monteiro Mr, Romcy-Pereira Rn, Leite Jp
Brain glucose metabolism is altered in sporadic Alzheimer's disease (sAD), whose pathologies are reproduced in rodents by intracerebroventricular (icv) infusion of streptozotocin (STZ) in subdiabetogenic doses. The icv-STZ model also culminates in central cholinergic dysfunctions, which in turn are known to underlie both the sAD cognitive decline, and synaptic plasticity impairments. Considering the cognitive-enhancing potential of chronic nicotine (Nic), we investigated whether it attenuates icv-STZ-induced impairments in recognition memory and synaptic plasticity in a cognition-relevant substrate: the hippocampal CA1-medial prefrontal cortex (mPFC) pathway...
April 19, 2017: Neuroscience
https://www.readbyqxmd.com/read/28433459/depressive-disorders-processes-leading-to-neurogeneration-and-potential-novel-treatments
#15
REVIEW
Gregory M Brown, Roger S McIntyre, Joshua Rosenblat, Rüdiger Hardeland
Mood disorders are wide spread with estimates that one in seven of the population are affected at some time in their life (Kessler et al., 2012). Many of those affected with severe depressive disorders have cognitive deficits which may progress to frank neurodegeneration. There are several peripheral markers shown by patients who have cognitive deficits that could represent causative factors and could potentially serve as guides to the prevention or even treatment of neurodegeneration. Circadian rhythm misalignment, immune dysfunction and oxidative stress and circadian rhythm misalignment are key pathologic processes implicated in neurodegeneration and cognitive dysfunction in depressive disorders...
April 19, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28433458/linking-the-biological-underpinnings-of-depression-role-of-mitochondria-interactions-with-melatonin-inflammation-sirtuins-tryptophan-catabolites-dna-repair-and-oxidative-and-nitrosative-stress-with-consequences-for-classification-and-cognition
#16
REVIEW
George Anderson
The pathophysiological underpinnings of neuroprogressive processes in recurrent major depressive disorder (rMDD) are reviewed. A wide array of biochemical processes underlie MDD presentations and their shift to a recurrent, neuroprogressive course, including: increased immune-inflammation, tryptophan catabolites (TRYCATs), mitochondrial dysfunction, aryl hydrocarbonn receptor activation, and oxidative and nitrosative stress (O&NS), as well as decreased sirtuins and melatonergic pathway activity. These biochemical changes may have their roots in central, systemic and/or peripheral sites, including in the gut, as well as in developmental processes, such as prenatal stressors and breastfeeding consequences...
April 19, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28433414/diffusion-tensor-imaging-findings-and-cognitive-function-following-hospitalised-mixed-mechanism-mild-traumatic-brain-injury-a-systematic-review-and-meta-analysis
#17
REVIEW
Lucy Oehr, Jacqueline Anderson
OBJECTIVE: To undertake a systematic review and meta-analysis of the relationship between microstructural damage and cognitive function following hospitalised mixed-mechanism (HMM) mild traumatic brain injury (mTBI). DATA SOURCES: PsycInfo, Embase, and Medline were used to find relevant empirical papers published between January 2002 to January 2016. STUDY SELECTION: Studies that examined the specific relationship between diffusion tensor imaging (DTI) and cognitive test performance were included...
April 19, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28432138/inhibition-of-drp1-ameliorates-synaptic-depression-a%C3%AE-deposition-and-cognitive-impairment-in-alzheimer-s-disease-model
#18
Seung-Hyun Baek, So Jung Park, Jae In Jeong, Sung Hyun Kim, Jihoon Han, Jae Won Kyung, Sang-Ha Baik, Yuri Choi, Bo-Youn Choi, Jinsu Park, Gahee Bahn, Ji Hyun Shin, Doo Sin Jo, Joo-Yong Lee, Choon-Gon Jang, Thiruma V Arumugam, Jongpil Kim, Jeung-Whan Han, Jae-Young Koh, Dong-Hyung Cho, Dong-Gyu Jo
Excessive mitochondrial fission is a prominent early event, and contributes to mitochondrial dysfunction, synaptic failure and neuronal cell death in the progression of Alzheimer's disease (AD). However, it remains to be determined whether inhibition of excessive mitochondrial fission is beneficial in mammal models of AD. To determine whether dynamin-related protein 1 (Drp1), a key regulator of mitochondrial fragmentation, can be a disease-modifying therapeutic target for AD, we examine the effects of Drp1 inhibitor on mitochondrial and synaptic dysfunctions induced by oligomeric β-amyloid (Aβ) in neurons, and neuropathology and cognitive functions in APP/PS1 double transgenic AD mice...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28432077/aerobic-exercise-promotes-executive-functions-and-impacts-functional-neural-activity-among-older-adults-with-vascular-cognitive-impairment
#19
Chun Liang Hsu, John R Best, Jennifer C Davis, Lindsay S Nagamatsu, Shirley Wang, Lara A Boyd, Gy Robin Hsiung, Michelle W Voss, Janice Jennifer Eng, Teresa Liu-Ambrose
BACKGROUND: Vascular cognitive impairment (VCI) results from cerebrovascular disease, and worldwide, it is the second most common type of cognitive dysfunction. While targeted aerobic training is a promising approach to delay the progression of VCI by reducing cardiometabolic risk factors, few randomised controlled trials to date have specifically assessed the efficacy of aerobic training on cognitive and brain outcomes in this group at risk for functional decline. AIM: To examine the effect of moderate-intensity aerobic training on executive functions and functional neural activity among older adults with mild subcortical ischaemic VCI (SIVCI)...
April 21, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28431605/global-brain-atrophy-and-metabolic-dysfunction-in-lgi1-encephalitis-a-prospective-multimodal-mri-study
#20
Monika Szots, Morten Blaabjerg, Gergely Orsi, Pernille Iversen, Daniel Kondziella, Camilla G Madsen, Ellen Garde, Peter O Magnusson, Peter Barsi, Ferenc Nagy, Hartwig R Siebner, Zsolt Illes
BACKGROUND: Chronic cognitive deficits are frequent in leucin-rich glioma-inactivated 1 protein (LGI1) encephalitis. We examined structural and metabolic brain abnormalities following LGI1 encephalitis and correlated findings with acute and follow-up clinical outcomes. METHODS: Nine patients underwent prospective multimodal 3 Tesla MRI 33.1±18months after disease onset, including automated volumetry, diffusion tensor imaging (DTI) and magnetic resonance spectroscopy (MRS)...
May 15, 2017: Journal of the Neurological Sciences
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