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clinical features of Alzheimer

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https://www.readbyqxmd.com/read/28227482/assessing-app-quality-through-expert-peer-review-a-case-study-from-the-gray-matters-study
#1
Phillip J Hartin, Ian Cleland, Chris D Nugent, Sally I McClean, JoAnn Tschanz, Christine Clark, Maria C Norton, Phillip J Hartin, Ian Cleland, Chris D Nugent, Sally I McClean, JoAnn Tschanz, Christine Clark, Maria C Norton, JoAnn Tschanz, Christine Clark, Ian Cleland, Maria C Norton, Sally I McClean, Chris D Nugent, Phillip J Hartin
Health apps focused on inciting behavior change are becoming increasingly popular. Nevertheless, many lack underlying evidence base, scientific credibility and have limited clinical effectiveness. It is therefore important that apps are well-informed, scientifically credible, peer reviewed and evidence based. This paper presents the use of the Mobile App Rating Scale (MARS) to assess the quality of the Grey Matters app, a cross platform app to deliver health education material and track behavior change across multi-domains with the aim of reducing the risk of developing Alzheimer's disease...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226665/changes-in-the-eeg-amplitude-as-a-biomarker-for-early-detection-of-alzheimer-s-disease
#2
Ali H Al-Nuaimi, Emmanuel Jammeh, Lingfen Sun, Emmanuel Ifeachor, Ali H Al-Nuaimi, Emmanuel Jammeh, Lingfen Sun, Emmanuel Ifeachor, Emmanuel Jammeh, Lingfen Sun, Ali H Al-Nuaimi, Emmanuel Ifeachor
The rapid increase in the number of older people with Alzheimer's disease (AD) and other forms of dementia represents one of the major challenges to the health and social care systems. Early detection of AD makes it possible for patients to access appropriate services and to benefit from new treatments and therapies, as and when they become available. The onset of AD starts many years before the clinical symptoms become clear. A biomarker that can measure the brain changes in this period would be useful for early diagnosis of AD...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225193/human-neural-progenitor-transplantation-rescues-behavior-and-reduces-%C3%AE-synuclein-in-a-transgenic-model-of-dementia-with-lewy-bodies
#3
Natalie R S Goldberg, Samuel E Marsh, Joseph Ochaba, Brandon C Shelley, Hayk Davtyan, Leslie M Thompson, Joan S Steffan, Clive N Svendsen, Mathew Blurton-Jones
Synucleinopathies are a group of neurodegenerative disorders sharing the common feature of misfolding and accumulation of the presynaptic protein α-synuclein (α-syn) into insoluble aggregates. Within this diverse group, Dementia with Lewy Bodies (DLB) is characterized by the aberrant accumulation of α-syn in cortical, hippocampal, and brainstem neurons, resulting in multiple cellular stressors that particularly impair dopamine and glutamate neurotransmission and related motor and cognitive function. Recent studies show that murine neural stem cell (NSC) transplantation can improve cognitive or motor function in transgenic models of Alzheimer's and Huntington's disease, and DLB...
February 22, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28224671/outcomes-after-diagnosis-of-mild-cognitive-impairment-in-a-large-autopsy-series
#4
Erin L Abner, Richard J Kryscio, Frederick A Schmitt, David W Fardo, Daniela C Moga, Eseosa T Ighodaro, Gregory A Jicha, Lei Yu, Hiroko H Dodge, Chengjie Xiong, Randall L Woltjer, Julie A Schneider, Nigel J Cairns, David A Bennett, Peter T Nelson
OBJECTIVE: Determine clinical and neuropathological outcomes following a clinical diagnosis of mild cognitive impairment (MCI). METHODS: Data were drawn from a large autopsy series (N=1,337) of individuals followed longitudinally from normal or MCI status to death, derived from four Alzheimer's Disease (AD) Centers in the United States. RESULTS: Mean follow-up was 7.9 years. Of the 874 individuals ever diagnosed with MCI, final clinical diagnoses were varied: 39...
February 22, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28217771/detection-inhibition-and-disintegration-of-amyloid-fibrils-the-role-of-optical-probes-and-macrocyclic-receptors
#5
Achikanath C Bhasikuttan, Jyotirmayee Mohanty
Amyloid fibrils are formed by the aberrant aggregation of proteins into highly ordered β-sheet structures and are believed to be the root cause of several neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, Prion diseases, etc. and have been the subject of extensive biochemical, biophysical and clinical studies. Developing methods for the early detection of fibril formation using optical spectroscopic techniques and inhibition/disintegration of amyloid fibrils/plaques by introducing small molecules have been a major challenge to establish a clinically facile therapeutic intervention to combat these neurodegenerative diseases...
February 20, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28212021/discovery-and-development-of-1-2-bromophenyl-sulfonyl-5-methoxy-3-4-methyl-1-piperazinyl-methyl-1h-indole-dimesylate-monohydrate-suvn-502-a-novel-potent-selective-and-orally-active-serotonin-6-5-ht6-receptor-antagonist-for-potential-treatment-of-alzheimer-s
#6
Ramakrishna Nirogi, Anil Shinde, Rama Sastry Kambhampati, Abdul Rasheed Mohammed, Sangram Keshari Saraf, Rajesh Kumar Badange, Thrinath Reddy Bandyala, Venugopalarao Bhatta, Kumar Bojja, Veena Reballi, Ramkumar Subramanian, Vijay Benade, Raghava Choudary Palacharla, Gopinadh Bhyrapuneni, Pradeep Jayarajan, Vinod Goyal, Venkat Jasti
Optimization of a novel series of 3-(piperazinylmethyl) indole derivatives as 5-hydroxytryptamine-6 receptor (5-HT6R) antagonists resulted in identification of 1-[(2-bromophenyl)sulfonyl]-5-methoxy-3-[(4-methyl-1-piperazinyl)methyl]-1H-indole dimesylate monohydrate (5al, SUVN-502) as a clinical candidate for potential treatment of cognitive disorders. It has high affinity at human 5-HT6R (Ki = 2.04 nM) and selectivity over 100 target sites which include receptors, enzymes, peptides, growth factors, ion channels, steroids, immunological factors, second messengers, and prostaglandins...
February 17, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28211813/classification-of-depression-cognitive-disorders-and-co-morbid-depression-and-cognitive-disorders-with-perfusion-spect-neuroimaging
#7
Daniel G Amen, Pavitra Krishnamani, Somayeh Meysami, Andrew Newberg, Cyrus A Raji
BACKGROUND: Depression and cognitive disorders (CDs) are two common co-morbid afflictions that commonly present with overlapping symptoms. OBJECTIVE: To evaluate if perfusion neuroimaging with brain SPECT can distinguish persons with depression from those with CDs or both conditions. METHODS: Inclusion criteria were DSM-IV defined depression or CDs (Alzheimer's disease, vascular dementia, dementia not otherwise specified, and amnestic disorders not otherwise specified) including persons with both (total n = 4,541; 847 CDs, 3,269 depression, 425 with both)...
February 10, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28211452/early-onset-and-delayed-onset-poststroke-dementia-revisiting-the-mechanisms
#8
REVIEW
Vincent C T Mok, Bonnie Y K Lam, Adrian Wong, Ho Ko, Hugh S Markus, Lawrence K S Wong
Incident stroke has long been recognized to cause dementia shortly after the event. Patients who survive stroke without early-onset poststroke dementia (PSD) are at a high risk of developing dementia months to years after the initial stroke incident, which has generated enthusiasm for exploring treatments to prevent delayed-onset PSD in survivors of stroke. However, results from clinical trials completed in the past 10-15 years have been disappointing. In light of these results, the present Review revisits the mechanisms of both early-onset and delayed-onset PSD and proposes preventive strategies and directions for future clinical trials...
February 17, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28181891/-chronic-traumatic-encephalopathy-an-old-acquaintance-in-athletes
#9
E G B Vijverberg, A C M Pijnenburg, P Scheltens, Y A L Pijnenburg
- Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease caused by repetitive head injuries like those seen in sports such as boxing, American football and soccer.- The clinical features of CTE are a range of cognitive, psychiatric and motor symptoms, and histopathology involves deposits of hyperphosphorylated tau protein and the presence of TAR DNA-binding protein (TDP-43) with relatively little beta-amyloid.- CTE is difficult to differentiate clinically from Alzheimer's disease, frontotemporal dementia and psychiatric disorders because of the major symptom overlap between these conditions...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28167394/deep-ensemble-learning-of-sparse-regression-models-for-brain-disease-diagnosis
#10
Heung-Il Suk, Seong-Whan Lee, Dinggang Shen
Recent studies on brain imaging analysis witnessed the core roles of machine learning techniques in computer-assisted intervention for brain disease diagnosis. Of various machine-learning techniques, sparse regression models have proved their effectiveness in handling high-dimensional data but with a small number of training samples, especially in medical problems. In the meantime, deep learning methods have been making great successes by outperforming the state-of-the-art performances in various applications...
January 24, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28164765/commonalities-in-biological-pathways-genetics-and-cellular-mechanism-between-alzheimer-disease-and-other-neurodegenerative-diseases-an-in-silico-updated-overview
#11
Khurshid Ahmad, Mohammad Hassan Baig, Gohar Mushtaq, Mohammad Amjad Kamal, Nigel H Greig, Inho Choi
Alzheimer's disease (AD) is the most common and well-studied neurodegenerative disease (ND). Biological pathways, pathophysiology and genetics of AD show commonalities with other NDs viz. Parkinson's disease (PD), Amyotrophic lateral sclerosis (ALS), Huntington's disease (HD), Prion Disease and Dentatorubral-pallidoluysian atrophy (DRPLA). Many of the NDs, sharing the common features and molecular mechanisms suggests that pathology may be directly comparable and be implicated in disease prevention and development of highly effective therapies...
February 3, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28160067/tau-aggregation-influences-cognition-and-hippocampal-atrophy-in-the-absence-of-beta-amyloid-a-clinico-imaging-pathological-study-of-primary-age-related-tauopathy-part
#12
Keith A Josephs, Melissa E Murray, Nirubol Tosakulwong, Jennifer L Whitwell, David S Knopman, Mary M Machulda, Stephen D Weigand, Bradley F Boeve, Kejal Kantarci, Leonard Petrucelli, Val J Lowe, Clifford R Jack, Ronald C Petersen, Joseph E Parisi, Dennis W Dickson
We investigate whether there is any association between the Braak neurofibrillary tangle (NFT) stage and clinical and MRI features in definite primary age-related tauopathy (PART). We analysed 52 cases with a Braak NFT tangle stage >0 and ≤IV, and a Thal phase of 0 (no beta-amyloid present). Twenty-nine (56%) were female. Median age at death was 88 years (IQR 82-92 years). Fifteen (29%) were TDP-positive (75% TDP stage I), 16 (31%) had argyrophilic grain disease and three (6%) had alpha-synuclein-positive Lewy bodies...
February 3, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28149964/early-diagnosis-of-alzheimer-s-disease-by-joint-feature-selection-and-classification-on-temporally-structured-support-vector-machine
#13
Yingying Zhu, Xiaofeng Zhu, Minjeong Kim, Dinggang Shen, Guorong Wu
The diagnosis of Alzheimer's disease (AD) from neuroimaging data at the pre-clinical stage has been intensively investigated because of the immense social and economic cost. In the past decade, computational approaches on longitudinal image sequences have been actively investigated with special attention to Mild Cognitive Impairment (MCI), which is an intermediate stage between normal control (NC) and AD. However, current state-of-the-art diagnosis methods have limited power in clinical practice, due to the excessive requirements such as equal and immoderate number of scans in longitudinal imaging data...
October 2016: Medical Image Computing and Computer-assisted Intervention: MICCAI ..
https://www.readbyqxmd.com/read/28133816/typical-and-atypical-pathology-in-primary-progressive-aphasia-variants
#14
Edoardo G Spinelli, Maria Luisa Mandelli, Zachary A Miller, Miguel A Santos-Santos, Stephen M Wilson, Federica Agosta, Lea T Grinberg, Eric J Huang, John Q Trojanowski, Marita Meyer, Maya L Henry, Giancarlo Comi, Gil Rabinovici, Howard J Rosen, Massimo Filippi, Bruce L Miller, William W Seeley, Maria Luisa Gorno-Tempini
OBJECTIVE: To characterize in vivo signatures of pathological diagnosis in a large cohort of patients with primary progressive aphasia (PPA) variants defined by current diagnostic classification. METHODS: Extensive clinical, cognitive, neuroimaging, and neuropathological data were collected from 69 patients with sporadic PPA, divided into 29 semantic (svPPA), 25 non-fluent (nfvPPA), 11 logopenic (lvPPA), and 4 mixed PPA. Patterns of grey matter (GM) and white matter (WM) atrophy at presentation were assessed and tested as predictors of pathological diagnosis using support vector machine (SVM) algorithms...
January 30, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28131209/potential-oxidative-stress-biomarkers-of-mild-cognitive-impairment-due-to-alzheimer-disease
#15
REVIEW
Ana García-Blanco, Miguel Baquero, Máximo Vento, Esperanza Gil, Luis Bataller, Consuelo Cháfer-Pericás
The high and increasing incidence of Alzheimer Disease (AD) worldwide is a major global concern. Classical diagnosis is carried out in the dementia phase, often in the moderate stages when treatment efficacy is limited. Nowadays, early diagnosis, even in pre-dementia stages, is possible in selected cases within an appropriate clinical setting, employing cerebral spinal fluid (CSF) sample analysis and neuroimaging procedures. In spite of the accurate diagnosis achieved by novel CSF biomarkers or positron emission tomography beta-amyloid tracers, these tests are invasive and expensive...
February 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28130713/objective-measurement-of-gait-parameters-in-healthy-and-cognitively-impaired-elderly-using-the-dual-task-paradigm
#16
Alexandra König, Laura Klaming, Marten Pijl, Alexandre Demeurraux, Renaud David, Philippe Robert
OBJECTIVES: The present study explores the differences in gait parameters in elderly subjects with or without cognitive impairment measured by means of ambulatory actigraphy while performing a single and a dual task. METHODS: Sixty-nine participants of which 23 individuals were diagnosed with Alzheimer's disease (AD), 24 individuals with mild cognitive impairment (MCI), and 22 healthy controls performed a single and dual walking task while wearing a wrist-worn accelerometer...
January 27, 2017: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/28113459/abnormality-detection-via-iterative-deformable-registration-and-basis-pursuit-decomposition
#17
Ke Zeng, Guray Erus, Aristeidis Sotiras, Ruseell T Shinohara, Christos Davatzikos
We present a generic method for automatic detection of abnormal regions in medical images as deviations from a normative data base. The algorithm decomposes an image, or more broadly a function defined on the image grid, into the superposition of a normal part and a residual term. A statistical model is constructed with regional sparse learning to represent normative anatomical variations among a reference population (e.g. healthy controls), in conjunction with a Markov Random Field regularization that ensures mutual consistency of the regional learning among partially overlapping image blocks...
March 7, 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28110464/alexithymia-in-people-with-subjective-cognitive-decline-mild-cognitive-impairment-and-mild-alzheimer-s-disease
#18
Mehmet Yuruyen, Fundan Engin Akcan, Gizem Cetiner Batun, Gozde Gultekin, Mesut Toprak, Hakan Yavuzer, Murat Emul
BACKGROUND: Behavioral and psychological symptoms are widely accepted as accelerator factors in progression to dementia. Although alexithymia is closely related to normal aging process and poor neurocognitive performance, alexithymia has not been included in these symptoms yet. AIMS: Here, we aimed to investigate alexithymia features in people with prominent clinical memory complaints. METHODS: The participants (n = 82) were classified into three groups as: subjective cognitive decline (n = 30), mild cognitive impairment (n = 27), and mild Alzheimer's disease (n = 25) after Mini-Mental State Examination, Clinical Dementia Rating Scale, neuropsychological test battery, Geriatric Depression Scale, and Hachinski Ischemic Scale...
January 21, 2017: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/28109312/locus-coeruleus-cellular-and-molecular-pathology-during-the-progression-of-alzheimer-s-disease
#19
Sarah C Kelly, Bin He, Sylvia E Perez, Stephen D Ginsberg, Elliott J Mufson, Scott E Counts
A major feature of Alzheimer's disease (AD) is the loss of noradrenergic locus coeruleus (LC) projection neurons that mediate attention, memory, and arousal. However, the extent to which the LC projection system degenerates during the initial stages of AD is still under investigation. To address this question, we performed tyrosine hydroxylase (TH) immunohistochemistry and unbiased stereology of noradrenergic LC neurons in tissue harvested postmortem from subjects who died with a clinical diagnosis of no cognitive impairment (NCI), amnestic mild cognitive impairment (aMCI, a putative prodromal AD stage), or mild/moderate AD...
January 21, 2017: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/28106561/the-modified-frontal-behavioral-inventory-fbi-mod-for-patients-with-frontotemporal-lobar-degeneration-alzheimer-s-disease-and-mild-cognitive-impairment
#20
Noora-Maria Suhonen, Ilona Hallikainen, Tuomo Hänninen, Jari Jokelainen, Johanna Krüger, Anette Hall, Maria Pikkarainen, Hilkka Soininen, Anne M Remes
While behavioral symptoms are both early and prevalent features of behavioral variant frontotemporal dementia (bvFTD), they can be present in other types of dementia as well, including Alzheimer's disease (AD) and even mild cognitive impairment (MCI). The Frontal Behavioral Inventory (FBI) was specifically developed to capture the behavioral and personality changes in bvFTD; it has also been modified into a self-administered caregiver questionnaire (FBI-mod). We examined the utility of the FBI-mod in differentiating bvFTD (n = 26), primary progressive aphasia (PPA) (n = 7), AD (n = 53), and MCI (n = 50) patients, and investigated how the FBI-mod may be associated with neuropsychological measures...
January 20, 2017: Journal of Alzheimer's Disease: JAD
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