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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
#1
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
https://www.readbyqxmd.com/read/28103749/clinical-practice-with-anti-dementia-drugs-a-revised-third-consensus-statement-from-the-british-association-for-psychopharmacology
#2
John T O'Brien, Clive Holmes, Matthew Jones, Roy Jones, Gill Livingston, Ian McKeith, Peter Mittler, Peter Passmore, Craig Ritchie, Louise Robinson, Elizabeth L Sampson, John-Paul Taylor, Alan Thomas, Alistair Burns
The British Association for Psychopharmacology coordinated a meeting of experts to review and revise its previous 2011 guidelines for clinical practice with anti-dementia drugs. As before, levels of evidence were rated using accepted standards which were then translated into grades of recommendation A-D, with A having the strongest evidence base (from randomised controlled trials) and D the weakest (case studies or expert opinion). Current clinical diagnostic criteria for dementia have sufficient accuracy to be applied in clinical practice (B) and both structural (computed tomography and magnetic resonance imaging) and functional (positron emission tomography and single photon emission computerised tomography) brain imaging can improve diagnostic accuracy in particular situations (B)...
December 1, 2016: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28101398/wide-field-retinal-optical-coherence-tomography-with-wavefront-sensorless-adaptive-optics-for-enhanced-imaging-of-targeted-regions
#3
James Polans, Brenton Keller, Oscar M Carrasco-Zevallos, Francesco LaRocca, Elijah Cole, Heather E Whitson, Eleonora M Lad, Sina Farsiu, Joseph A Izatt
The peripheral retina of the human eye offers a unique opportunity for assessment and monitoring of ocular diseases. We have developed a novel wide-field (>70°) optical coherence tomography system (WF-OCT) equipped with wavefront sensorless adaptive optics (WSAO) for enhancing the visualization of smaller (<25°) targeted regions in the peripheral retina. We iterated the WSAO algorithm at the speed of individual OCT B-scans (~20 ms) by using raw spectral interferograms to calculate the optimization metric...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28092591/relational-regularized-discriminative-sparse-learning-for-alzheimer-s-disease-diagnosis
#4
Baiying Lei, Peng Yang, Tianfu Wang, Siping Chen, Dong Ni
Accurate identification and understanding informative feature is important for early Alzheimer's disease (AD) prognosis and diagnosis. In this paper, we propose a novel discriminative sparse learning method with relational regularization to jointly predict the clinical score and classify AD disease stages using multimodal features. Specifically, we apply a discriminative learning technique to expand the class-specific difference and include geometric information for effective feature selection. In addition, two kind of relational information are incorporated to explore the intrinsic relationships among features and training subjects in terms of similarity learning...
January 16, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28088191/predicting-probable-alzheimer-s-disease-using-linguistic-deficits-and-biomarkers
#5
Sylvester O Orimaye, Jojo S-M Wong, Karen J Golden, Chee P Wong, Ireneous N Soyiri
BACKGROUND: The manual diagnosis of neurodegenerative disorders such as Alzheimer's disease (AD) and related Dementias has been a challenge. Currently, these disorders are diagnosed using specific clinical diagnostic criteria and neuropsychological examinations. The use of several Machine Learning algorithms to build automated diagnostic models using low-level linguistic features resulting from verbal utterances could aid diagnosis of patients with probable AD from a large population...
January 14, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28054371/review-tau-in-biofluids-relation-to-pathology-imaging-and-clinical-features
#6
Henrik Zetterberg
Tau is a microtubule-binding protein that is important for the stability of neuronal axons. It is normally expressed within neurons and is also secreted into the brain interstitial fluid that communicates freely with cerebrospinal fluid (CSF) and, in a more restricted manner, blood via the glymphatic clearance system of the brain. In Alzheimer's disease (AD), neuroaxonal degeneration results in increased release of tau from neurons. Further, tau is truncated and phosphorylated, which leads to aggregation of tau in neurofibrillary tangles of the proximal axoplasm...
January 5, 2017: Neuropathology and Applied Neurobiology
https://www.readbyqxmd.com/read/28050343/brain-insulin-resistance-deteriorates-cognition-by-altering-the-topological-features-of-brain-networks
#7
Fan Su, Hao Shu, Qing Ye, Zan Wang, Chunming Xie, Baoyu Yuan, Zhijun Zhang, Feng Bai
Insulin resistance represents one of the mechanisms underlying the link between type 2 diabetes (T2D) and Alzheimer's disease (AD), and we explored its in vivo neurobiology related to cognition based on a pathway-based genetic association analyses. Eighty-seven mild cognitive impairment (MCIs) subjects and 135 matched controls (HCs) were employed at baseline, and they underwent functional MRI scans, clinical evaluations and exon sequencings of 20 genes related to brain insulin resistance. A longitudinal study for an average of 35 months was performed to assess their cognitive decline over time...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28043897/natural-products-against-alzheimer-s-disease-pharmaco-therapeutics-and-biotechnological-interventions
#8
REVIEW
Abhijit Dey, Raktim Bhattacharya, Anuradha Mukherjee, Devendra Kumar Pandey
Alzheimer's disease (AD) is a severe, chronic and progressive neurodegenerative disease associated with memory and cognition impairment ultimately leading to death. It is the commonest reason of dementia in elderly populations mostly affecting beyond the age of 65. The pathogenesis is indicated by accumulation of the amyloid-beta (Aβ) plaques and neurofibrillary tangles (NFT) in brain tissues and hyperphosphorylation of tau protein in neurons. The main cause is considered to be the formation of reactive oxygen species (ROS) due to oxidative stress...
December 30, 2016: Biotechnology Advances
https://www.readbyqxmd.com/read/28025715/alzheimer-s-disease-experimental-models-and-reality
#9
REVIEW
Eleanor Drummond, Thomas Wisniewski
Experimental models of Alzheimer's disease (AD) are critical to gaining a better understanding of pathogenesis and to assess the potential of novel therapeutic approaches. The most commonly used experimental animal models are transgenic mice that overexpress human genes associated with familial AD (FAD) that result in the formation of amyloid plaques. However, AD is defined by the presence and interplay of both amyloid plaques and neurofibrillary tangle pathology. The track record of success in AD clinical trials thus far has been very poor...
December 26, 2016: Acta Neuropathologica
https://www.readbyqxmd.com/read/28019685/tauopathy-with-hippocampal-4-repeat-tau-immunoreactive-spherical-inclusions-a-report-of-three-cases
#10
Gabor G Kovacs, Linda K Kwong, Murray Grossman, David J Irwin, Edward B Lee, John L Robinson, Eunran Suh, Vivianna M Van Deerlin, Virginia M Lee, John Q Trojanowski
Tauopathies are a major group of neurodegenerative proteinopathies characterized by the accumulation of abnormal and hyperphosphorylated tau proteins in the brain. Tau pathology is characterized as 3R (repeat) or 4R predominant or mixed 3R and 4R type. Here we report three cases lacking mutations in the microtubule associated protein tau (MAPT) gene with unusual tau pathology. The age at onset and duration of illness, respectively, were 63 and 20 years (male), 67 and 5 years (female) and 72 and 20 years (female)...
December 26, 2016: Brain Pathology
https://www.readbyqxmd.com/read/28017479/diffusion-characteristics-of-the-fornix-in-patients-with-alzheimer-s-disease
#11
Shou Xian Tang, Qing Liang Feng, Gui Hong Wang, Shaofeng Duan, Bao Ci Shan, Jian Ping Dai
White matter degradation is a major part of the pathogenesis of Alzheimer's disease (AD). The fornix is the predominant outflow tract from the hippocampus, and alterations to its microstructure in patients with AD are still being explored. Diffusion tensor imaging (DTI) is an in vivo neuroimaging technique that can provide unique information about alterations in tissue microstructure, which can indicate underlying neurobiological process at the microstructural level. In this prospective study, DTI was used to assess and analyze the microstructural features of the fornix in subjects with AD (n = 17), mild cognitive impairment (MCI; n = 12) and healthy controls (n = 17)...
October 1, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/28009724/current-opinion-in-alzheimer-s-disease-therapy-by-nanotechnology-based-approaches
#12
Shakeel Ahmed Ansari, Rukhsana Satar, Asma Perveen, Ghulam Md Ashraf
PURPOSE OF REVIEW: Nanotechnology typically deals with the measuring and modeling of matter at nanometer scale by incorporating the fields of engineering and technology. The most prominent feature of these engineered materials involves their manipulation/modification for imparting new functional properties. The current review covers the most recent findings of Alzheimer's disease (AD) therapeutics based on nanoscience and technology. RECENT FINDINGS: Current studies involve the application of nanotechnology in developing novel diagnostic and therapeutic tools for neurological disorders...
December 21, 2016: Current Opinion in Psychiatry
https://www.readbyqxmd.com/read/28009087/distribution-and-characteristics-of-transactive-response-dna-binding-protein-43-kda-pathology-in-progressive-supranuclear-palsy
#13
Shunsuke Koga, Monica Sanchez-Contreras, Keith A Josephs, Ryan J Uitti, Neill Graff-Radford, Jay A van Gerpen, William P Cheshire, Zbigniew K Wszolek, Rosa Rademakers, Dennis W Dickson
BACKGROUND: This study aimed to determine the frequency of transactive response DNA binding protein 43 kDa pathology in PSP, the clinical features of patients with this pathology, and genetic risk factors for it. METHODS: Hippocampal sections were screened with immunohistochemistry for transactive response DNA binding protein 43 kDa in 945 PSP cases. A subset of 261 cases that were negative in hippocampus was screened in the amygdala. The density and disruption of this pathology, as well as regional tau burden, and clinical and genetic characteristics were analyzed...
December 23, 2016: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/27997711/alzheimer-neuropathology-without-frontotemporal-lobar-degeneration-hallmarks-tar-dna-binding-protein-43-inclusions-in-missense-progranulin-mutation-cys139arg
#14
Veronica Redaelli, Giacomina Rossi, Emanuela Maderna, Gabor G Kovacs, Elena Piccoli, Paola Caroppo, Francesca Cacciatore, Sonia Spinello, Marina Grisoli, Giuliano Sozzi, Andrea Salmaggi, Fabrizio Tagliavini, Giorgio Giaccone
Null mutations in progranulin gene (GRN) reduce the progranulin production resulting in haploinsufficiency and are tightly associated with tau-negative frontotemporal lobar degeneration with TAR DNA-binding protein 43-positive inclusions (FTLD-TDP). Missense mutations of GRN were also identified, but their effects are not completely clear, in particular unanswered is the question of what neuropathology they elicit, also considering that their occurrence has been reported in patients with typical clinical features of Alzheimer disease...
December 20, 2016: Brain Pathology
https://www.readbyqxmd.com/read/27979768/a-state-of-delirium-deciphering-the-effect-of-inflammation-on-tau-pathology-in-alzheimer-s-disease
#15
Matthew Barron, Jane Gartlon, Lee A Dawson, Peter J Atkinson, Marie-Christine Pardon
Alzheimer's disease (AD), the predominant form of dementia, is highly correlated with the abnormal hyperphosphorylation and aggregation of tau. Immune responses are key drivers of AD and how they contribute to tau pathology in human disease remains largely unknown. This review summarises current knowledge on the association between inflammatory processes and tau pathology. While, preclinical evidence suggests that inflammation can indeed induce tau hyperphosphorylation at both pre- and post-tangles epitopes, a better understanding of whether this develops into advanced pathological features such as neurofibrillary tangles is needed...
December 12, 2016: Experimental Gerontology
https://www.readbyqxmd.com/read/27979356/neuropathological-and-genetic-correlates-of-survival-and-dementia-onset-in-synucleinopathies-a-retrospective-analysis
#16
David J Irwin, Murray Grossman, Daniel Weintraub, Howard I Hurtig, John E Duda, Sharon X Xie, Edward B Lee, Vivianna M Van Deerlin, Oscar L Lopez, Julia K Kofler, Peter T Nelson, Gregory A Jicha, Randy Woltjer, Joseph F Quinn, Jeffery Kaye, James B Leverenz, Debby Tsuang, Katelan Longfellow, Dora Yearout, Walter Kukull, C Dirk Keene, Thomas J Montine, Cyrus P Zabetian, John Q Trojanowski
BACKGROUND: Great heterogeneity exists in survival and the interval between onset of motor symptoms and dementia symptoms across synucleinopathies. We aimed to identify genetic and pathological markers that have the strongest association with these features of clinical heterogeneity in synucleinopathies. METHODS: In this retrospective study, we examined symptom onset, and genetic and neuropathological data from a cohort of patients with Lewy body disorders with autopsy-confirmed α synucleinopathy (as of Oct 1, 2015) who were previously included in other studies from five academic institutions in five cities in the USA...
January 2017: Lancet Neurology
https://www.readbyqxmd.com/read/27965568/regularized-linear-discriminant-analysis-of-eeg-features-in-dementia-patients
#17
Emanuel Neto, Felix Biessmann, Harald Aurlien, Helge Nordby, Tom Eichele
The present study explores if EEG spectral parameters can discriminate between healthy elderly controls (HC), Alzheimer's disease (AD) and vascular dementia (VaD) using. We considered EEG data recorded during normal clinical routine with 114 healthy controls (HC), 114 AD, and 114 VaD patients. The spectral features extracted from the EEG were the absolute delta power, decay from lower to higher frequencies, amplitude, center and dispersion of the alpha power and baseline power of the entire frequency spectrum...
2016: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/27965552/dietary-intake-of-nutrients-and-lifestyle-affect-the-risk-of-mild-cognitive-impairment-in-the-chinese-elderly-population-a-cross-sectional-study
#18
Yanhui Lu, Yu An, Jin Guo, Xiaona Zhang, Hui Wang, Hongguo Rong, Rong Xiao
Mild cognitive impairment (MCI) is a pre-clinical stage of Alzheimer's disease afflicting a large number of the elderly throughout the world. However, modifiable risk factors for the onset and progression of MCI remain unclear. A cross-sectional study was performed to explore whether and how daily dietary nutrients intake and lifestyle impacted the risk of MCI in the Chinese elderly. We examined 2,892 elderly subjects, including 768 MCI patients and 2,124 subjects with normal cognition in three different Provinces of China...
2016: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/27955679/post-mortem-histopathology-underlying-%C3%AE-amyloid-pet-imaging-following-flutemetamol-f-18-injection
#19
Milos D Ikonomovic, Chris J Buckley, Kerstin Heurling, Paul Sherwin, Paul A Jones, Michelle Zanette, Chester A Mathis, William E Klunk, Aruna Chakrabarty, James Ironside, Azzam Ismail, Colin Smith, Dietmar R Thal, Thomas G Beach, Gill Farrar, Adrian P L Smith
In vivo imaging of fibrillar β-amyloid deposits may assist clinical diagnosis of Alzheimer's disease (AD), aid treatment selection for patients, assist clinical trials of therapeutic drugs through subject selection, and be used as an outcome measure. A recent phase III trial of [(18)F]flutemetamol positron emission tomography (PET) imaging in 106 end-of-life subjects demonstrated the ability to identify fibrillar β-amyloid by comparing in vivo PET to post-mortem histopathology. Post-mortem analyses demonstrated a broad and continuous spectrum of β-amyloid pathology in AD and other dementing and non-dementing disease groups...
December 12, 2016: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/27940274/direct-conversion-of-human-fibroblasts-into-neural-progenitors-using-transcription-factors-enriched-in-human-esc-derived-neural-progenitors
#20
Pei-Shan Hou, Ching-Yu Chuang, Chan-Hsien Yeh, Wei Chiang, Hsiao-Jung Liu, Teng-Nan Lin, Hung-Chih Kuo
Early human embryonic stem cell (hESC)-derived neural populations consist of various embryonic neural progenitors (ENPs) with broad neural developmental propensity. Here, we sought to directly convert human somatic cells into ENP-like phenotypes using hESC-ENP-enriched neural transcription factors (TFs). We demonstrated that induced ENP could be efficiently converted from human fibroblasts using two TF combinations. The iENPs exhibit cellular and molecular characteristics resembling hESC-ENPs and can give rise to astrocytes, oligodendrocytes, and functional neuronal subtypes of the central and peripheral nervous system...
January 10, 2017: Stem Cell Reports
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