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https://www.readbyqxmd.com/read/28315846/risk-factors-for-early-psychosis-in-pd-insights-from-the-parkinson-s-progression-markers-initiative
#1
Dominic H Ffytche, Joana B Pereira, Clive Ballard, K Ray Chaudhuri, Daniel Weintraub, Dag Aarsland
BACKGROUND: Parkinson's Disease (PD) psychosis refers to the spectrum of illusions, formed hallucinations and delusions that occur in PD. Visual hallucinations and illusions are thought to be caused by specific cognitive and higher visual function deficits and patients who develop such symptoms early in the disease course have greater rates of cognitive decline and progression to dementia. To date, no studies have investigated whether such deficits are found prior to the onset of PD psychosis...
April 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28315844/cerebral-glucose-metabolism-and-cognition-in-newly-diagnosed-parkinson-s-disease-icicle-pd-study
#2
M J Firbank, A J Yarnall, R A Lawson, G W Duncan, T K Khoo, G S Petrides, J T O'Brien, R A Barker, R J Maxwell, D J Brooks, D J Burn
OBJECTIVE: To assess reductions of cerebral glucose metabolism in Parkinson's disease (PD) with 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET), and their associations with cognitive decline. METHODS: FDG-PET was performed on a cohort of 79 patients with newly diagnosed PD (mean disease duration 8 months) and 20 unrelated controls. PD participants were scanned while on their usual dopaminergic medication. Cognitive testing was performed at baseline, and after 18 months using the Cognitive Drug Research (CDR) and Cambridge Neuropsychological Test Automated Battery (CANTAB) computerised batteries, the Mini-Mental State Examination (MMSE), and the Montreal Cognitive Assessment (MoCA)...
April 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28315409/in-vivo-tau-pet-imaging-in-dementia-pathophysiology-radiotracer-quantification-and-a-systematic-review-of-clinical-findings
#3
REVIEW
Benjamin Hall, Elijah Mak, Simon Cervenka, Franklin I Aigbirhio, James B Rowe, John T O'Brien
In addition to the deposition of β-amyloid plaques, neurofibrillary tangles composed of aggregated hyperphosphorylated tau are one of the pathological hallmarks of Alzheimer's disease and other neurodegenerative disorders. Until now, our understanding about the natural history and topography of tau deposition has only been based on post-mortem and cerebrospinal fluid studies, and evidence continues to implicate tau as a central driver of downstream neurodegenerative processes and cognitive decline. Recently, it has become possible to assess the regional distribution and severity of tau burden in vivo with the development of novel radiotracers for positron emission tomography (PET) imaging...
March 14, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28304293/coordinate-based-meta-analysis-of-the-default-mode-and-salience-network-for-target-identification-in-non-invasive-brain-stimulation-of-alzheimer-s-disease-and-behavior-variant-frontotemporal-dementia-networks
#4
Michela Pievani, Lorenzo Pini, Clarissa Ferrari, Francesca B Pizzini, Ilaria Boscolo Galazzo, Chiara Cobelli, Maria Cotelli, Rosa Manenti, Giovanni B Frisoni
BACKGROUND: The accurate choice of the site of non-invasive brain stimulation (NIBS) is an important factor in trial design. OBJECTIVE: Based on the observation that Alzheimer's disease (AD) and behavioral frontotemporal dementia (bvFTD) affect specific large-scale networks, i.e., the default mode network (DMN) and the salience network (SN), respectively, we aimed to identify population-average coordinates of these networks that could be used as potential targets in NIBS trials aiming to modulate these circuits...
March 13, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28293793/ultrasensitive-and-selective-detection-of-3-repeat-tau-seeding-activity-in-pick-disease-brain-and-cerebrospinal-fluid
#5
Eri Saijo, Bernardino Ghetti, Gianluigi Zanusso, Adrian Oblak, Jennifer L Furman, Marc I Diamond, Allison Kraus, Byron Caughey
The diagnosis and treatment of diseases involving tau-based pathology such as Alzheimer disease and certain frontotemporal dementias is hampered by the inability to detect pathological forms of tau with sufficient sensitivity, specificity and practicality. In these neurodegenerative diseases, tau accumulates in self-seeding filaments. For example, Pick disease (PiD) is associated with frontotemporal degeneration and accumulation of 3-repeat (3R) tau isoforms in filaments constituting Pick bodies. Exploiting the self-seeding activity of tau deposits, and using a 3R tau fragment as a substrate, we have developed an assay (tau RT-QuIC) that can detect tau seeds in 2 µl aliquots of PiD brain dilutions down to 10(-7)-10(-9)...
March 14, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28289749/motor-speech-phenotypes-of-frontotemporal-dementia-primary-progressive-aphasia-and-progressive-apraxia-of-speech
#6
Matthew L Poole, Amy Brodtmann, David Darby, Adam P Vogel
Purpose: Our purpose was to create a comprehensive review of speech impairment in frontotemporal dementia (FTD), primary progressive aphasia (PPA), and progressive apraxia of speech in order to identify the most effective measures for diagnosis and monitoring, and to elucidate associations between speech and neuroimaging. Method: Speech and neuroimaging data described in studies of FTD and PPA were systematically reviewed. A meta-analysis was conducted for speech measures that were used consistently in multiple studies...
March 13, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28283675/amyotrophic-lateral-sclerosis-gene-deregulation-in-the-anterior-horn-of-the-spinal-cord-and-frontal-cortex-area-8-implications-in-frontotemporal-lobar-degeneration
#7
Pol Andrés-Benito, Jesús Moreno, Ester Aso, Mónica Povedano, Isidro Ferrer
Transcriptome arrays identifies 747 genes differentially expressed in the anterior horn of the spinal cord and 2,300 genes differentially expressed in frontal cortex area 8 in a single group of typical sALS cases without frontotemporal dementia compared with age-matched controls. Main up-regulated clusters in the anterior horn are related to inflammation and apoptosis; down-regulated clusters are linked to axoneme structures and protein synthesis. In contrast, up-regulated gene clusters in frontal cortex area 8 involve neurotransmission, synaptic proteins and vesicle trafficking, whereas main down-regulated genes cluster into oligodendrocyte function and myelin-related proteins...
March 9, 2017: Aging
https://www.readbyqxmd.com/read/28281852/the-patterns-of-eeg-changes-in-early-onset-parkinson-s-disease-patients
#8
Xuetao He, Yuhu Zhang, Jieling Chen, Chunge Xie, Rong Gan, Rong Yang, Limin Wang, Kun Nie, Lijuan Wang
The aim of this study was to investigate the patterns of brain activities changes in early-onset parkinson's disease(EOPD) patients and its relationship with the severity of disease and motor deterioration. Electroencephalography (EEG) was performed in a sample of 52 nondemented EOPD patients and 20 healthy controls with similar age. All patients underwent a battery to assess PD severity and motor deterioration. The EEG data were rated by visual and quantitative analyses with the Grant total EEG(GTE) score and NicoletOne Software...
March 10, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/28276180/cognitive-impairment-self-perceived-health-and-quality-of-life-of-older-prisoners
#9
Nicolas Combalbert, Valérie Pennequin, Claude Ferrand, Marine Armand, Morgane Anselme, Brigitte Geffray
BACKGROUND: There is a wealth of studies of somatic and mental illness among prisoners, but little on older prisoners and their cognitive aging. AIMS: Our study examines the cognitive performance of older male prisoners and its effect on their perceived health and quality of life. METHODS: A total of 138 men aged 50 or over were recruited in seven French prisons and 138 men of similar ages from the general population. Two assessments of executive cognitive functions - the mini-mental state examination and the frontal assessment battery - were administered to each participant, together with self rating schedules of health (Nottingham Health Profile), subjective state of mental health and quality of life (the brief World Health Organisation Quality of Life Questionnaire)...
March 9, 2017: Criminal Behaviour and Mental Health: CBMH
https://www.readbyqxmd.com/read/28269775/reduction-of-rpt6-s8-a-proteasome-component-and-proteasome-activity-in-the-cortex-is-associated-with-cognitive-impairment-in-lewy-body-dementia
#10
Amani Alghamdi, Julie Vallortigara, David R Howlett, Martin Broadstock, Tibor Hortobágyi, Clive Ballard, Alan J Thomas, John T O'Brien, Dag Aarsland, Johannes Attems, Paul T Francis, David R Whitfield
Lewy body dementia is the second most common neurodegenerative dementia and is pathologically characterized by α-synuclein positive cytoplasmic inclusions, with varying amounts of amyloid-β (Aβ) and hyperphosphorylated tau (tau) aggregates in addition to synaptic loss. A dysfunctional ubiquitin proteasome system (UPS), the major proteolytic pathway responsible for the clearance of short lived proteins, may be a mediating factor of disease progression and of the development of α-synuclein aggregates. In the present study, protein expression of a key component of the UPS, the RPT6 subunit of the 19S regulatory complex was determined...
March 1, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28265813/quantitative-neuropathology-an-update-on-automated-methodologies-and-implications-for-large-scale-cohorts
#11
Lauren Walker, Kirsty E McAleese, Mary Johnson, Ahmad A Khundakar, Daniel Erskine, Alan J Thomas, Ian G McKeith, Johannes Attems
A tissue microarray (TMA) has previously been developed for use in assessment of neurodegenerative diseases. We investigated the variation of pathology loads in semi-quantitative score categories and how pathology load related to disease progression. Post-mortem tissue from 146 cases were used; Alzheimer's disease (AD) (n = 36), Lewy body disease (LBD) (n = 56), mixed AD/dementia with Lewy bodies (n = 14) and controls (n = 40). TMA blocks (one per case) were constructed using tissue cores from 15 brain regions including cortical and subcortical regions...
March 6, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28265458/diagnosing-the-frontal-variant-of-alzheimer-s-disease-a-clinician-s-yellow-brick-road
#12
REVIEW
Russell P Sawyer, Federico Rodriguez-Porcel, Matthew Hagen, Rhonna Shatz, Alberto J Espay
BACKGROUND: Disruption of the frontal lobes and its associated networks are a common consequence of neurodegenerative disorders. Given the wide range of cognitive, behavioral and motor processes in which the frontal lobes are involved, there can be a great variety of manifestations depending on the pathology distribution. The most common are the behavioral variant of frontotemporal dementia (bvFTD) and the frontal variant of Alzheimer's disease (fvAD), which are particularly challenging to disentangle...
2017: Journal of Clinical Movement Disorders
https://www.readbyqxmd.com/read/28262813/effects-of-dbs-in-parkinsonian-patients-depend-on-the-structural-integrity-of-frontal-cortex
#13
Muthuraman Muthuraman, Günther Deuschl, Nabin Koirala, Christian Riedel, Jens Volkmann, Sergiu Groppa
While deep brain stimulation of the subthalamic nucleus (STN-DBS) has evolved to an evidence-based standard treatment for Parkinson's disease (PD), the targeted cerebral networks are poorly described and no objective predictors for the postoperative clinical response exist. To elucidate the systemic mechanisms of DBS, we analysed cerebral grey matter properties using cortical thickness measurements and addressed the dependence of structural integrity on clinical outcome. Thirty one patients with idiopathic PD without dementia (23 males, age: 63...
March 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28260543/characteristics-and-health-conditions-of-a-group-of-nursing-home-patients-with-mental-physical-multimorbidity-the-mapping-study
#14
Anne M A van den Brink, Debby L Gerritsen, Miranda M H de Valk, Richard C Oude Voshaar, Raymond T C M Koopmans
BACKGROUND: Long-term care facilities have partly taken over the traditional asylum function of psychiatric hospitals and house an increasing group of patients with mental-physical multimorbidity (MPM). Little is known about the characteristics, behavior, and care dependency of these patients. This paper aims to describe these aspects. METHODS: Explorative, descriptive study among patients with MPM without dementia (n = 142), living in 17 geronto-psychiatric nursing home (NH) units across the Netherlands, stratified by those referred from mental healthcare services (MHS) and other healthcare services (OHS)...
March 6, 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/28253276/clinical-and-neuroimaging-characteristics-of-chinese-dementia-with-lewy-bodies
#15
Shuai Liu, Xiao-Dan Wang, Ying Wang, Zhihong Shi, Li Cai, Shuling Liu, Tong Han, Yuying Zhou, Xinping Wang, Shuo Gao, Yong Ji
Dementia with Lewy bodies (DLB) is the second most common subtype of degenerative dementia. To our knowledge, available information about the clinical features of DLB in China remains limited. Our study therefore aimed to address this issue. Thirty-seven Chinese patients with probable DLB were recruited for this study. All subjects underwent neuropsychological assessment by trained neurologists, as well as undergoing MRI, 11C-PIB PET scans for Aβ deposition and 18F-FDG PET scans for regional cerebral glucose metabolism...
2017: PloS One
https://www.readbyqxmd.com/read/28245482/neuropsychiatric-symptoms-in-alzheimer-disease-vascular-dementia-and-mixed-dementia
#16
Cassandra J Anor, Sean O'Connor, Amardeep Saund, David F Tang-Wai, Ron Keren, Maria Carmela Tartaglia
BACKGROUND/AIMS: Neuropsychiatric symptoms (NPS) are common in Alzheimer disease (AD) and vascular dementia (VaD), and are distressful to patients and caregivers. NPS are likely related to the underlying pathology. Previous studies suggest that frontal lobe lesions and vascular changes such as white matter hyperintensities (WMH) have a significant association with specific NPS. The current study aimed to compare NPS in patients with AD, VaD, and mixed AD/VaD, and to evaluate the differences in the prevalence of NPS in relation to frontal WMH volume...
March 1, 2017: Neuro-degenerative Diseases
https://www.readbyqxmd.com/read/28243073/a-case-of-possibly-pathogenic-psen2-r62c-mutation-in-a-patient-with-probable-early-onset-alzheimer-s-dementia-supported-by-structure-prediction
#17
Kyung Won Park, Seong Soo An, Eva Bagyinszky, SangYun Kim
A 49-year-old Korean male patient with dementia was diagnosed with probable early-onset Alzheimer's disease (AD). He presented with memory problems, personality changes, and disorientation. His family history of dementia was probably negative, since no family member with dementia was found or mentioned. Mild cortical atrophy was observed upon magnetic resonance imaging analyses of his brain, and the single-photon emission computed tomography analysis revealed hypoperfusion in the frontal, temporal, and limbic lobes...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28240379/different-apathy-clinical-profile-and-neural-correlates-in-behavioral-variant-frontotemporal-dementia-and-alzheimer-s-disease
#18
Marta Fernández-Matarrubia, Jordi A Matías-Guiu, María Nieves Cabrera-Martín, Teresa Moreno-Ramos, María Valles-Salgado, José Luis Carreras, Jorge Matías-Guiu
OBJECTIVES: Apathy is one of the most common and disabling syndromes of dementia. Clinical apathy expression and neuroanatomical basis of apathy seem to differ between behavioral variant frontotemporal dementia (bvFTD) and Alzheimer's disease (AD), although evidence is scarce and poorly understood. Our main purposes were to compare the clinical apathy profile from patients with bvFTD and AD and analyze the relationship between apathy and brain metabolism measured using positron emission tomography imaging with (18) F fluorodeoxyglucose (FDG-PET)...
February 27, 2017: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28236279/oas-gene-family-expression-is-associated-with-hiv-related-neurocognitive-disorders
#19
C Sanfilippo, M R Pinzone, D Cambria, A Longo, M Palumbo, R Di Marco, F Condorelli, G Nunnari, L Malaguarnera, M Di Rosa
HIV-associated neurocognitive disorders are common in HIV-infected individuals, even in the combination antiretroviral therapy (c-ART) era. Several mechanisms are involved in neuronal damage, including chronic inflammation immune activation. Mammalian 2'-5'-oligoadenylate synthetase (OAS) genes are produced in response to interferon (IFN), mainly by monocytes, and exert their antiviral functions by activation of RNase L that degrades viral and cellular RNAs. In this study, we aimed at exploring OAS gene family RNA expression in simian immunodeficiency virus encephalitis (SIVE), in HIV-associated neurocognitive disorders (HAND), and in HIV-associate dementia (HAD)...
February 24, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28235814/differentiating-cognitive-impairment-due-to-corticobasal-degeneration-and-alzheimer-disease
#20
Gregory S Day, Tae Sung Lim, Jason Hassenstab, Alison M Goate, Elizabeth A Grant, Catherine M Roe, Nigel J Cairns, John C Morris
OBJECTIVE: To identify clinical features that reliably differentiate individuals with cognitive impairment due to corticobasal degeneration (CBD) and Alzheimer disease (AD). METHODS: Clinical features were compared between individuals with autopsy-proven CBD (n = 17) and AD (n = 16). All individuals presented with prominent cognitive complaints and were evaluated annually with semistructured interviews, detailed neurologic examinations, and neuropsychological testing...
February 24, 2017: Neurology
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