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https://www.readbyqxmd.com/read/28091722/hyperphosphorylated-tau-causes-reduced-hippocampal-ca1-excitability-by-relocating-the-axon-initial-segment
#1
Robert John Hatch, Yan Wei, Di Xia, Jürgen Götz
Hyperphosphorylated tau has a critical role in tauopathies such as Alzheimer's disease and frontotemporal dementia, impairing neuronal function and eventually leading to neurodegeneration. A critical role for tau is supported by studies in transgenic mouse models that express the P301L tau mutation found in cases of familial frontotemporal dementia, with the accumulation of hyperphosphorylated tau in the hippocampus causing reductions in hippocampal long-term potentiation and impairments in spatial learning and memory...
January 16, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28078993/mirnas-new-biomarkers-and-therapeutic-targets-in-dementia
#2
Ana Teresa Viegas, Joana Ribeiro Guedes, Ana Rafaela Oliveira, Ana Maria Sequeira Cardoso, Ana Luísa Colaço Cardoso
BACKGROUND: Dementia is a complex pathological state that affects millions of individuals worldwide and is responsible for a huge socioeconomic burden, making it a major health concern of current times. Given the impact of dementia in both patients and caregivers, it is crucial to fully clarify the molecular mechanisms underlying dementia-associated disorders, since without this knowledge our ability to correctly diagnose and treat these diseases is severely hampered. METHODS: Epigenetic mechanisms, such as miRNA-mediated post-transcriptional regulation, have been reported to play a role in dementia pathogenesis...
10, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28062720/multimodal-characterization-of-older-apoe2-carriers-reveals-selective-reduction-of-amyloid-load
#3
Michel J Grothe, Sylvia Villeneuve, Martin Dyrba, David Bartrés-Faz, Miranka Wirth
OBJECTIVE: To comprehensively assess neurobiological effects of the protective APOE2 allele in the aged brain using a cross-sectional multimodal neuroimaging approach. METHODS: Multimodal neuroimaging data were obtained from a total of 572 older individuals without dementia (cognitively normal and mild cognitive impairment) enrolled in the Alzheimer's Disease Neuroimaging Initiative and included assessments of regional amyloid load with AV45-PET, glucose metabolism with fluorodeoxyglucose-PET, and gray matter volume with structural MRI...
February 7, 2017: Neurology
https://www.readbyqxmd.com/read/28057562/imaging-retina-to-study-dementia-and-stroke
#4
REVIEW
Carol Yim-Lui Cheung, M Kamran Ikram, Christopher Chen, Tien Yin Wong
With increase in life expectancy, the number of persons suffering from common age-related brain diseases, including neurodegenerative (e.g., dementia) and cerebrovascular (e.g., stroke) disease is expected to rise substantially. As current neuro-imaging modalities such as magnetic resonance imaging may not be able to detect subtle subclinical changes (resolution <100-500 μm) in dementia and stroke, there is an urgent need for other complementary techniques to probe the pathophysiology of these diseases...
January 3, 2017: Progress in Retinal and Eye Research
https://www.readbyqxmd.com/read/28034725/mechanisms-of-acupuncture-on-vascular-dementia-a-review-of-animal-studies
#5
Yang Ye, Wen Zhu, Xue-Rui Wang, Jing-Wen Yang, Ling-Yong Xiao, Yi Liu, Xin Zhang, Cun-Zhi Liu
Vascular dementia (VaD) is the second leading type of dementia after Alzheimer's disease plaguing the aging population. Acupuncture has served as alternative and complementary medicine in the world for a long time and its use for VaD is based on a large body of preclinical and clinical researches. The mechanisms that underlie the protective effects of acupuncture are slowly beginning to be understood. Acupuncture influences multiple aspects of the pathological process of VaD. It improves cognitive function through protecting cerebral neurons from oxidative stress, apoptosis, and neuroinflammation, regulating glucose metabolism and neurotransmitters...
December 26, 2016: Neurochemistry International
https://www.readbyqxmd.com/read/28026197/what-paint-can-tell-us-a-fractal-analysis-of-neurological-changes-in-seven-artists
#6
Alex Forsythe, Tamsin Williams, Ronan G Reilly
OBJECTIVE: The notion that artistic capability increases with dementia is both novel and largely unsupported by available literature. Recent research has suggested an emergence of artistic capabilities to be a by-product of involuntary behaviour seen with dementia, as opposed to a progression in original thinking (de Souza, et al., 2010). A far more complementary explanation comes from Hannemann (2006), who suggests that art offers an outlet for dementia patients to refine and sharpen their cognitive abilities...
January 2017: Neuropsychology
https://www.readbyqxmd.com/read/28005462/recognition-of-c9orf72-mutant-rna-by-single-stranded-silencing-rnas
#7
Jiaxin Hu, Frank Rigo, Thazha P Prakash, David R Corey
Mutations within the chromosome 9 open reading frame 72 (c9orf72) gene are associated with both familial amyotrophic lateral sclerosis and frontotemporal dementia. The mutation leads to an expanded GGGGCC hexanucleotide repeat within the first intron of c9orf72 and an expanded CCCCGG repeat within a corresponding antisense transcript. Both the mutant intronic and antisense RNAs have been implicated in disease. We have previously reported that duplex RNAs complementary to the repeats can recognize disease-causing RNA and block detection of nuclear foci formed by the mutant transcripts...
December 22, 2016: Nucleic Acid Therapeutics
https://www.readbyqxmd.com/read/27986990/multiparametric-computer-aided-differential-diagnosis-of-alzheimer-s-disease-and-frontotemporal-dementia-using-structural-and-advanced-mri
#8
Esther E Bron, Marion Smits, Janne M Papma, Rebecca M E Steketee, Rozanna Meijboom, Marius de Groot, John C van Swieten, Wiro J Niessen, Stefan Klein
OBJECTIVES: To investigate the added diagnostic value of arterial spin labelling (ASL) and diffusion tensor imaging (DTI) to structural MRI for computer-aided classification of Alzheimer's disease (AD), frontotemporal dementia (FTD), and controls. METHODS: This retrospective study used MRI data from 24 early-onset AD and 33 early-onset FTD patients and 34 controls (CN). Classification was based on voxel-wise feature maps derived from structural MRI, ASL, and DTI...
December 16, 2016: European Radiology
https://www.readbyqxmd.com/read/27981671/distinct-white-matter-injury-associated-with-medial-temporal-lobe-atrophy-in-alzheimer-s-versus-semantic-dementia
#9
Alexandre Bejanin, Béatrice Desgranges, Renaud La Joie, Brigitte Landeau, Audrey Perrotin, Florence Mézenge, Serge Belliard, Vincent de La Sayette, Francis Eustache, Gaël Chételat
This study aims at further understanding the distinct vulnerability of brain networks in Alzheimer's disease (AD) versus semantic dementia (SD) investigating the white matter injury associated with medial temporal lobe (MTL) atrophy in both conditions. Twenty-six AD patients, twenty-one SD patients, and thirty-nine controls underwent a high-resolution T1-MRI scan allowing to obtain maps of grey matter volume and white matter density. A statistical conjunction approach was used to identify MTL regions showing grey matter atrophy in both patient groups...
December 16, 2016: Human Brain Mapping
https://www.readbyqxmd.com/read/27884130/a-profile-of-the-clinical-course-of-cognition-and-comorbidity-in-mild-cognitive-impairment-and-dementia-study-the-4c-study-two-complementary-longitudinal-clinical-cohorts-in-the-netherlands
#10
Weiqi Liao, Renske E G Hamel, Marcel G M Olde Rikkert, Saskia M Oosterveld, Pauline Aalten, Frans R J Verhey, Philip Scheltens, Nicole Sistermans, Yolande A L Pijnenburg, Wiesje M van der Flier, Inez H G B Ramakers, René J F Melis
BACKGROUND: Heterogeneous disease trajectories of mild cognitive impairment (MCI) and dementia are frequently encountered in clinical practice, but there is still insufficient knowledge to understand the reasons and mechanisms causing this heterogeneity. In addition to correlates of the disorder, patient characteristics such as their health status, social environment, comorbidities and frailty may contribute to variability in trajectories over time. The current paper outlines the study design and the study population of and provides an overview of the data collected in the Clinical Course of Cognition and Comorbidity in Mild Cognitive Impairment (4C-MCI cohort, n = 315) and Dementia (4C-Dementia cohort, n = 331) Study...
November 25, 2016: BMC Neurology
https://www.readbyqxmd.com/read/27862327/an-order-in-lewy-body-disorders-retrograde-degeneration-in-hyperbranching-axons-as-a-fundamental-structural-template-accounting-for-focal-multifocal-lewy-body-disease
#11
REVIEW
Toshiki Uchihara 内原 俊記
Initial clinical recognition of "paralysis agitans" by James Parkinson was expanded by Jean-Martin Charcot, who recognized additional clinical findings of his own, such as slowness (distinct from paralysis), rigidity (distinct from spasticity) and characteristic countenance. Charcot assembled these findings under the umbrella of "Parkinson disease (PD)". This purely clinical concept was so prescient and penetrating that subsequent neuropathological and biochemical evidences were ordered along this axis to establish the nigra-central trinity of PD (dopamine depletion, nigral lesion with Lewy bodies: LBs)...
November 14, 2016: Neuropathology: Official Journal of the Japanese Society of Neuropathology
https://www.readbyqxmd.com/read/27859960/cognitive-phenotypes-in-parkinson-s-disease-differ-in-terms-of-brain-network-organization-and-connectivity
#12
Renaud Lopes, Christine Delmaire, Luc Defebvre, Anja J Moonen, Annelien A Duits, Paul Hofman, Albert F G Leentjens, Kathy Dujardin
Cognitive deficits are common in Parkinson's disease and we suspect that dysfunctions of connected brain regions can be the source of these deficits. The aim of the present study was to investigate changes in whole-brain intrinsic functional connectivity according to differences in cognitive profiles in Parkinson's disease. 119 participants were enrolled and divided into four groups according to their cognitive phenotypes (determined by a cluster analysis): (i) 31 cognitively intact patients (G1), (ii) 31 patients with only slight mental slowing (G2), (iii) 43 patients with mild to moderate deficits mainly in executive functions (G3), (iv) 14 patients with severe deficits in all cognitive domains (G4-5)...
November 17, 2016: Human Brain Mapping
https://www.readbyqxmd.com/read/27817760/a-process-evaluation-of-a-psychomotor-dance-therapy-intervention-dancin-for-behavior-change-in-dementia-attitudes-and-beliefs-of-participating-residents-and-staff
#13
Azucena Guzmán, Lisa Robinson, Lynn Rochester, Ian A James, Julian C Hughes
BACKGROUND: In a previous paper, we presented results from a 12-week study of a Psychomotor DANCe Therapy INtervention (DANCIN) based on Danzón Latin Ballroom that involves motor, emotional-affective, and cognitive domains, using a multiple-baseline single-case design in three care homes. This paper reports the results of a complementary process evaluation to elicit the attitudes and beliefs of home care staff, participating residents, and family members with the aim of refining the content of DANCIN in dementia care...
November 7, 2016: International Psychogeriatrics
https://www.readbyqxmd.com/read/27751631/examining-the-relationship-between-multidrug-resistant-organism-acquisition-and-exposure-to-antimicrobials-in-long-term-care-populations-a-review
#14
REVIEW
Michele L Shaffer, Erika M C D'Agata, Daniel Habtemariam, Susan L Mitchell
PURPOSE: Methodological approaches to examine the association between antimicrobial exposure and multidrug-resistant organism (MDRO) acquisition are complex. This report's objectives are to review approaches used in and findings of prior studies in the long-term care setting, illustrate how these challenges were addressed in a recently completed large prospective study, and discuss strategies for future studies. METHODS: Key design and analytic approaches used in studies conducted since 2000 examining the association between antimicrobial exposure and MDRO acquisition in the long-term care setting were reviewed...
November 2016: Annals of Epidemiology
https://www.readbyqxmd.com/read/27686075/bee-venom-ameliorates-cognitive-dysfunction-caused-by-neuroinflammation-in-an-animal-model-of-vascular-dementia
#15
Mudan Cai, Jun Hwan Lee, Eun Jin Yang
Vascular dementia (VaD) is caused by the reduction of blood supply by vessel occlusion and is characterized by progressive cognitive decline. VaD incidence has been growing due to the aging population, placing greater strain on social and economic resources. However, the pathological mechanisms underlying VaD remain unclear. Many studies have used the bilateral common carotid artery occlusion (BCCAO) animal model to investigate potential therapeutics for VaD. In this study, we investigated whether bee venom (BV) improves cognitive function and reduces neuroinflammation in the hippocampus of BCCAO animals...
September 29, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27626305/depression-and-diagnosis-of-neurocognitive-impairment-in-hiv-positive-patients
#16
C A T Pinheiro, L D M Souza, J V S Motta, E F Kelbert, M S Souza, C S R Martins, F M C Coelho, K A T Pinheiro, R T Pinheiro
Neurocognitive impairment (NCI) is frequently observed in patients infected with human immunodeficiency virus (HIV) and results from the compromise of subcortical brain structures by the virus. The manifestations of NCI range from asymptomatic impairment to dementia. In addition to cognitive impairment resulting from HIV infection, other factors such as depression are associated with the loss of cognitive functions. The aim of this study was to estimate the prevalence of NCI in HIV-positive patients in a city in southern Brazil and to establish possible associations for the prevalence of NCI with HIV-related and other risk factors...
September 12, 2016: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/27583423/complementary-integrative-therapies-that-work-a-review-of-the-evidence
#17
Benjamin Kligler, Raymond Teets, Melissa Quick
Significant evidence supports the effectiveness and safety of several complementary or integrative treatment approaches to common primary care problems. Acupuncture is effective in the management of chronic low back pain. Mind-body interventions such as cognitive behavior therapy, yoga, tai chi, qi gong, and music therapy may be helpful for treating insomnia. Exercise can reduce anxiety symptoms. Herbal preparations and nutritional supplements can be useful as first-line therapy for certain conditions, such as fish oil for hypertriglyceridemia, St...
September 1, 2016: American Family Physician
https://www.readbyqxmd.com/read/27567827/within-individual-variability-an-index-for-subtle-change-in-neurocognition-in-mild-cognitive-impairment
#18
David R Roalf, Megan Quarmley, Dawn Mechanic-Hamilton, David A Wolk, Steven E Arnold, Paul J Moberg
BACKGROUND: The transition from mild cognitive impairment (MCI) to Alzheimer's disease is characterized by a decline in cognitive performance in many domains. Cognitive performance profiles in MCI are heterogeneous, however, and additional insights into markers of incipient dementia are needed. Typically, studies focus on average or mean performance, but ignore consistency of performance across domains. WIV (within-individual variability) provides an index of this consistency and is a potential marker of cognitive decline...
August 10, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27554665/audiometric-evaluation-in-patients-with-alzheimer-s-disease
#19
Alexandre Villeneuve, Caroline Hommet, Charles Aussedat, Emmanuel Lescanne, Kevin Reffet, David Bakhos
The objective of this study is to assess the validity of ASSR as a complementary diagnostic test for peripheral hearing loss by proving a significant correlation between behavioral thresholds and ASSR. The design used in this study is monocentric prospective study from November 2014 to April 2015. The setting used in this study is the ENT-Head and Neck Surgery Department and Geriatrics Department in a French Regional and University Hospital. The participants are patients over 75 years with cognitive impairment (Alzheimer's disease or mild-cognitive impairment) with a Mini-Mental State Examination score under 27/30 and without hearing aids...
January 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27384985/quantitative-t2-mapping-of-white-matter-applications-for-ageing-and-cognitive-decline
#20
Michael J Knight, Bryony McCann, Demitra Tsivos, Serena Dillon, Elizabeth Coulthard, Risto A Kauppinen
In MRI, the coherence lifetime T2 is sensitive to the magnetic environment imposed by tissue microstructure and biochemistry in vivo. Here we explore the possibility that the use of T2 relaxometry may provide information complementary to that provided by diffusion tensor imaging (DTI) in ageing of healthy controls (HC), Alzheimer's disease (AD) and mild cognitive impairment (MCI). T2 and diffusion MRI metrics were quantified in HC and patients with MCI and mild AD using multi-echo MRI and DTI. We used tract-based spatial statistics (TBSS) to evaluate quantitative MRI parameters in white matter (WM)...
August 7, 2016: Physics in Medicine and Biology
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