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https://www.readbyqxmd.com/read/29775672/upregulation-of-psmb8-and-cathepsins-in-the-human-brains-of-dementia-with-lewy-bodies
#1
Qunxing Ding, Haiyan Zhu
Proteasome and lysosome are responsible for the homeostasis of proteins, lipids and carbohydrates in cells. Numerous reports indicate the proteolytic pathways have altered functions during neurodegeneration and aging. Dementia with Lewy bodies (DLB) is one of the leading forms of dementia, and the proteolytic alteration in DLB has not yet been fully investigated. This study shows that the components of proteasome and lysosome had selectively altered gene expression and enzymatic functions. Specifically, PSMB8, an inducible proteasomal β subunit, had elevated mRNA level and protein level in DLB brain compared with age-matched controls...
May 16, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29764386/parkinson-s-disease-diagnostic-observations-paddo-study-rationale-and-design-of-a-prospective-cohort-study-for-early-differentiation-of-parkinsonism
#2
Anouke van Rumund, Marjolein B Aerts, Rianne A J Esselink, Frederick J A Meijer, Marcel M Verbeek, Bastiaan R Bloem
BACKGROUND: Differentiation of Parkinson's disease (PD) from the various types of atypical parkinsonism (AP) such as multiple system atrophy (MSA), progressive supranuclear palsy (PSP), dementia with Lewy bodies (DLB), corticobasal syndrome (CBS) and vascular parkinsonism (VP), can be challenging, especially early in the disease course when symptoms overlap. A major unmet need in the diagnostic workup of these disorders is a diagnostic tool that differentiates the various disorders, preferably in the earliest disease stages when the clinical presentation is similar...
May 16, 2018: BMC Neurology
https://www.readbyqxmd.com/read/29761296/neuroimaging-in-lewy-body-dementia
#3
REVIEW
Tayyabah Yousaf, George Dervenoulas, Polytimi-Eleni Valkimadi, Marios Politis
Lewy body dementia (DLB) is a common form of cognitive impairment, accounting for 30% of dementia cases in ages over 65 years. Early diagnosis of DLB has been challenging; particularly in the context of differentiation with Parkinson's disease dementia and other forms of dementias, such as Alzheimer's disease and rapidly progressive dementias. Current practice involves the use of [123 I]FP-CIT-SPECT, [18 F]FDG PET and [123 I]MIBG molecular imaging to support diagnostic procedures. Structural imaging techniques have an essential role for excluding structural causes, which could lead to a DLB-like phenotype, as well as aiding differential diagnosis through illustrating disease-specific patterns of atrophy...
May 14, 2018: Journal of Neurology
https://www.readbyqxmd.com/read/29755341/plasma-biomarkers-differentiate-parkinson-s-disease-from-atypical-parkinsonism-syndromes
#4
Chin-Hsien Lin, Shieh-Yueh Yang, Herng-Er Horng, Che-Chuan Yang, Jen-Jie Chieh, Hsin-Hsien Chen, Bing-Hsien Liu, Ming-Jang Chiu
Objective: Parkinson's disease (PD) has significant clinical overlaps with atypical parkinsonism syndromes (APS), which have a poorer treatment response and a more aggressive course than PD. We aimed to identify plasma biomarkers to differentiate PD from APS. Methods: Plasma samples ( n = 204) were obtained from healthy controls and from patients with PD, dementia with Lewy bodies (DLB), multiple system atrophy, progressive supranuclear palsy (PSP), corticobasal degeneration (CBD), or frontotemporal dementia (FTD) with parkinsonism (FTD-P) or without parkinsonism...
2018: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29755340/glutamate-transporter-glt1-expression-in-alzheimer-disease-and-dementia-with-lewy-bodies
#5
Paula Garcia-Esparcia, Daniela Diaz-Lucena, Marina Ainciburu, Benjamin Torrejón-Escribano, Margarita Carmona, Franc Llorens, Isidro Ferrer
Glutamate transporter solute carrier family 1, member 2 (GLT1/EAAT2), a major modulator of glutamate homeostasis in astrocytes, is assessed in post-mortem human brain samples of frontal cortex area 8 in advanced stages of Alzheimer disease (AD) and terminal stages of dementia with Lewy bodies (DLB) in order to gain understanding of astrogliopathy in diseases manifested by dementia. Glial fibrillary acidic protein (GFAP) mRNA expression is significantly increased in AD but not in DLB, whereas GLT1 , vesicular glutamate transporter 1 ( vGLUT1 ) and aldehyde dehydrogenase 1 family member 1 ( ALDH1L1 ) are not modified in AD and DLB when compared with controls...
2018: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29754119/a-pilot-study-and-brief-overview-of-rehabilitation-via-virtual-environment-in-patients-suffering-from-dementia
#6
Th Fasilis, P Patrikelis, A Siatouni, A Alexoudi, A Veretzioti, L Zachou, S-St Gatzonis
Dementia is one of the increasing problems of modern societies. The immediate cure is not a possible solution, at least at the moment, but science has found a number of new ways to retard and under specific conditions to halt its development. A potential, and constantly evolving scientific field is the use of Computerized Cognitive Rehabilitation (CCR) and Virtual Environments (Vr.E). According to the existing literature, subjecting patients to various neuro-rehabilitative conditions within 3D virtual environments, allows them to obtain significant therapeutic benefits in which both transferability and durations over time are observed, in relation to the training period of the intervention...
January 2018: Psychiatrikē, Psychiatriki
https://www.readbyqxmd.com/read/29746400/mri-of-non-alzheimer-s-dementia-current-and-emerging-knowledge
#7
Massimo Filippi, Federica Agosta
PURPOSE OF REVIEW: The correct classification of non-Alzheimer's dementia is crucial to study disease mechanisms, predict disease progression and test disease-specific treatments. Brain atrophy assessment with morphometric MRI is currently the gold standard for in-vivo localization of neurodegeneration. Structural and functional connectivity biomarkers are becoming increasingly available. This review emphasizes the potential applications of MRI in the main non-Alzheimer's dementia such as dementia with Lewy bodies (DLB) and frontotemporal dementia (FTD)...
May 8, 2018: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29742972/validity-and-clinical-utility-of-different-clock-drawing-test-scoring-systems-in-multiple-forms-of-dementia
#8
Diana Duro, Miguel Tábuas-Pereira, Sandra Freitas, Beatriz Santiago, Maria Amália Botelho, Isabel Santana
The Clock Drawing Test (CDT) has a known potential for the detection of cognitive impairment in populations with dementia, especially Alzheimer disease (AD). Our aim was to compare the clinical utility of 3 CDT scoring systems (Rouleau, Cahn, and Babins) in several pathologies with cognitive compromise from a tertiary center memory clinic. We selected patients with a clinical diagnosis of mild stage AD, behavioral variant frontotemporal dementia (FTD), vascular dementia (VaD), dementia with Lewy bodies (DLB), and Parkinson disease with dementia (PDD)...
January 1, 2018: Journal of Geriatric Psychiatry and Neurology
https://www.readbyqxmd.com/read/29742332/clinical-features-of-auditory-hallucinations-in-patients-with-dementia-with-lewy-bodies-a-soundtrack-of-visual-hallucinations
#9
Naoko Tsunoda, Mamoru Hashimoto, Tomohisa Ishikawa, Ryuji Fukuhara, Seiji Yuki, Hibiki Tanaka, Yutaka Hatada, Yusuke Miyagawa, Manabu Ikeda
OBJECTIVE: Auditory hallucinations are an important symptom for diagnosing dementia with Lewy bodies (DLB), yet they have received less attention than visual hallucinations. We investigated the clinical features of auditory hallucinations and the possible mechanisms by which they arise in patients with DLB. METHODS: We recruited 124 consecutive patients with probable DLB (diagnosis based on the DLB International Workshop 2005 criteria; study period: June 2007-January 2015) from the dementia referral center of Kumamoto University Hospital...
May 8, 2018: Journal of Clinical Psychiatry
https://www.readbyqxmd.com/read/29736698/clinical-utility-of-fdg-pet-for-the-differential-diagnosis-among-the-main-forms-of-dementia
#10
Peter J Nestor, Daniele Altomare, Cristina Festari, Alexander Drzezga, Jasmine Rivolta, Zuzana Walker, Femke Bouwman, Stefania Orini, Ian Law, Federica Agosta, Javier Arbizu, Marina Boccardi, Flavio Nobili, Giovanni Battista Frisoni
AIM: To assess the clinical utility of FDG-PET as a diagnostic aid for differentiating Alzheimer's disease (AD; both typical and atypical forms), dementia with Lewy bodies (DLB), frontotemporal lobar degeneration (FTLD), vascular dementia (VaD) and non-degenerative pseudodementia. METHODS: A comprehensive literature search was conducted using the PICO model to extract evidence from relevant studies. An expert panel then voted on six different diagnostic scenarios using the Delphi method...
May 7, 2018: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29735655/soluble-epoxide-hydrolase-plays-a-key-role-in-the-pathogenesis-of-parkinson-s-disease
#11
Qian Ren, Min Ma, Jun Yang, Risa Nonaka, Akihiro Yamaguchi, Kei-Ichi Ishikawa, Kenta Kobayashi, Shigeo Murayama, Sung Hee Hwang, Shinji Saiki, Wado Akamatsu, Nobutaka Hattori, Bruce D Hammock, Kenji Hashimoto
Parkinson's disease (PD) is characterized as a chronic and progressive neurodegenerative disorder, and the deposition of specific protein aggregates of α-synuclein, termed Lewy bodies, is evident in multiple brain regions of PD patients. Although there are several available medications to treat PD symptoms, these medications do not prevent the progression of the disease. Soluble epoxide hydrolase (sEH) plays a key role in inflammation associated with the pathogenesis of PD. Here we found that MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine)-induced neurotoxicity in the mouse striatum was attenuated by subsequent repeated administration of TPPU, a potent sEH inhibitor...
May 7, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29723870/functional-disconnectivity-during-inter-task-resting-state-in-dementia-with-lewy-bodies
#12
Eléna Chabran, Daniel Roquet, Daniel Gounot, Marion Sourty, Jean-Paul Armspach, Frédéric Blanc
AIMS: Limited research has been done on the functional connectivity in visuoperceptual regions in dementia with Lewy bodies (DLB) patients. This study aimed to investigate the functional connectivity differences between a task condition and an inter-task resting state condition within a visuoperceptual paradigm, in DLB patients compared with Alzheimer disease (AD) patients and healthy elderly control subjects. METHODS: Twenty-six DLB, 29 AD, and 22 healthy subjects underwent a detailed clinical and neuropsychological examination along with a functional MRI during the different conditions of a visuoperceptual paradigm...
May 3, 2018: Dementia and Geriatric Cognitive Disorders
https://www.readbyqxmd.com/read/29716652/%C3%AE-synuclein-fibril-induced-paradoxical-structural-and-functional-defects-in-hippocampal-neurons
#13
Jessica M Froula, Benjamin W Henderson, Jose Carlos Gonzalez, Jada H Vaden, John W Mclean, Yumei Wu, Gokulakrishna Banumurthy, Linda Overstreet-Wadiche, Jeremy H Herskowitz, Laura A Volpicelli-Daley
Neuronal inclusions composed of α-synuclein (α-syn) characterize Parkinson's Disease (PD) and Dementia with Lewy bodies (DLB). Cognitive dysfunction defines DLB, and up to 80% of PD patients develop dementia. α-Syn inclusions are abundant in the hippocampus, yet functional consequences are unclear. To determine if pathologic α-syn causes neuronal defects, we induced endogenous α-syn to form inclusions resembling those found in diseased brains by treating hippocampal neurons with α-syn fibrils. At seven days after adding fibrils, α-syn inclusions are abundant in axons, but there is no cell death at this time point, allowing us to assess for potential alterations in neuronal function that are not caused by neuron death...
May 1, 2018: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/29704213/%C3%A9-synuclein-strains-and-seeding-in-parkinson-s-disease-incidental-lewy-body-disease-dementia-with-lewy-bodies-and-multiple-system-atrophy-similarities-and-differences
#14
REVIEW
W Peelaerts, L Bousset, V Baekelandt, R Melki
Several age-related neurodegenerative disorders are characterized by the deposition of aberrantly folded endogenous proteins. These proteins have prion-like propagation and amplification properties but so far appear nontransmissible between individuals. Because of the features they share with the prion protein, PrP, the characteristics of pathogenic protein aggregates in several progressive brain disorders, including different types of Lewy body diseases (LBDs), such as Parkinson's disease (PD), multiple system atrophy (MSA) and dementia with Lewy bodies (DLB), have been actively investigated...
April 27, 2018: Cell and Tissue Research
https://www.readbyqxmd.com/read/29704037/clinical-utility-of-fdg-pet-for-the-clinical-diagnosis-in-mci
#15
REVIEW
Javier Arbizu, Cristina Festari, Daniele Altomare, Zuzana Walker, Femke Bouwman, Jasmine Rivolta, Stefania Orini, Henryk Barthel, Federica Agosta, Alexander Drzezga, Peter Nestor, Marina Boccardi, Giovanni Battista Frisoni, Flavio Nobili
PURPOSE: We aim to report the quality of accuracy studies investigating the utility of [18 F]fluorodeoxyglucose (FDG)-PET in supporting the diagnosis of prodromal Alzheimer's Disease (AD), frontotemporal lobar degeneration (FTLD) and prodromal dementia with Lewy bodies (DLB) in mild cognitive impairment (MCI) subjects, and the corresponding recommendations made by a panel of experts. METHODS: Seven panellist, four from the European Association of Nuclear Medicine, and three from the European Academy of Neurology, produced recommendations taking into consideration the incremental value of FDG-PET, as added on clinical-neuropsychological examination, to ascertain the aetiology of MCI (AD, FTLD or DLB)...
April 27, 2018: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29692275/diagnostic-accuracy-of-dopaminergic-imaging-in-prodromal-dementia-with-lewy-bodies
#16
Alan J Thomas, Paul Donaghy, Gemma Roberts, Sean J Colloby, Nicky A Barnett, George Petrides, Jim Lloyd, Kirsty Olsen, John-Paul Taylor, Ian McKeith, John T O'Brien
BACKGROUND: Dopaminergic imaging has high diagnostic accuracy for dementia with Lewy bodies (DLB) at the dementia stage. We report the first investigation of dopaminergic imaging at the prodromal stage. METHODS: We recruited 75 patients over 60 with mild cognitive impairment (MCI), 33 with probable MCI with Lewy body disease (MCI-LB), 15 with possible MCI-LB and 27 with MCI with Alzheimer's disease. All underwent detailed clinical, neurological and neuropsychological assessments and FP-CIT [123I-N-fluoropropyl-2β-carbomethoxy-3β-(4-iodophenyl)] dopaminergic imaging...
April 25, 2018: Psychological Medicine
https://www.readbyqxmd.com/read/29673784/visual-texture-agnosia-in-dementia-with-lewy-bodies-and-alzheimer-s-disease
#17
Yuka Oishi, Toru Imamura, Tatsuo Shimomura, Kyoko Suzuki
BACKGROUND: Neuroimaging and some clinical studies have reported that the ventral visual pathway is relevant for visual texture recognition. Although a variety of visual deficits have been reported in patients with Alzheimer's disease (AD) and dementia with Lewy bodies (DLB), visual material identification and texture recognition have not been thoroughly examined. OBJECTIVES: To investigate visual texture recognition in patients with AD and DLB and to clarify the relationship between visual texture recognition and various visuoperceptual functions...
March 27, 2018: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29669601/potent-prion-like-behaviors-of-pathogenic-%C3%AE-synuclein-and-evaluation-of-inactivation-methods
#18
Airi Tarutani, Tetsuaki Arai, Shigeo Murayama, Shin-Ichi Hisanaga, Masato Hasegawa
The concept that abnormal protein aggregates show prion-like propagation between cells has been considered to explain the onset and progression of many neurodegenerative diseases. Indeed, both synthetic amyloid-like fibrils and pathogenic proteins extracted from patients' brains induce self-templated amplification and cell-to-cell transmission in vitro and in vivo. However, it is unclear whether exposure to exogenous prion-like proteins can potentially cause these diseases in humans. Here, we investigated in detail the prion-like seeding activities of several kinds of pathogenic α-synuclein (α-syn), including synthetic fibrils and detergent-insoluble fractions extracted from brains of patients with α-synucleinopathies...
April 18, 2018: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/29665124/how-does-dementia-with-lewy-bodies-start-prodromal-cognitive-changes-in-rem-sleep-behavior-disorder
#19
Daphné Génier Marchand, Ronald B Postuma, Frédérique Escudier, Jessie De Roy, Amélie Pelletier, Jacques Montplaisir, Jean-François Gagnon
Objective We describe the progression of cognitive decline and identify the predictive values of cognitive tests in three groups of REM sleep behavior disorder (RBD) patients classified at their last follow-up as having Parkinson's disease (PD), dementia with Lewy bodies (DLB), or still-idiopathic. Methods Patients (n=109) underwent polysomnographic, neurological, and neuropsychological assessments. We used linear mixed-model analyses to compare the progression of cognitive test performance between the three groups over a three-year prodromal period, and performed linear regressions for a six-year prodromal period...
April 17, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29658429/color-vision-impairment-differentiates-alzheimer-dementia-from-dementia-with-lewy-bodies
#20
Patrick M Flanigan, Mitra A Khosravi, James B Leverenz, Babak Tousi
OBJECTIVE: Dementia with Lewy bodies (DLB) is frequently misdiagnosed for Alzheimer dementia (AD), especially in its earlier stages. We characterized color vision impairment (CVI) in patients with DLB versus patients with AD to determine its usefulness in improving accuracy of early diagnosis. METHODS: We retrospectively reviewed charts of patients with AD, DLB, and patients with mild cognitive impairment suspected to be in the prodromal phase of DLB (pro-DLB) or prodromal phase of AD (pro-AD)...
March 2018: Journal of Geriatric Psychiatry and Neurology
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