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Alzheimers monitoring

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https://www.readbyqxmd.com/read/28926752/response-bias-and-response-monitoring-evidence-from-healthy-older-adults-and-patients-with-mild-alzheimer-s-disease
#1
Rebecca G Deason, Michelle J Tat, Sean Flannery, Prabhakar S Mithal, Erin P Hussey, Eileen T Crehan, Brandon A Ally, Andrew E Budson
Patients with Alzheimer's disease (AD) often exhibit an abnormally liberal response bias in recognition memory tests, responding "old" more frequently than "new." Investigations have shown patients can to shift to a more conservative response bias when given instructions. We examined if patients with mild AD could alter their response patterns when the ratio of old items is manipulated without explicit instruction. Healthy older adults and AD patients studied lists of words and then were tested in three old/new ratio conditions (30%, 50%, or 70% old items)...
September 16, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28922154/atrial-fibrillation-is-independently-associated-with-cognitive-impairment-after-ischemic-stroke
#2
Russell Jude Chander, Levinia Lim, Sagarika Handa, Shaun Hiu, Angeline Choong, Xuling Lin, Rajinder Singh, Daniel Oh, Nagaendran Kandiah
BACKGROUND: While atrial fibrillation (AF) is an important risk factor for ischemic strokes and mild cognitive impairment (MCI) in Alzheimer's disease, the association between AF and post-stroke cognitive impairment (PSCI), and the factors mediating this association, is unclear. OBJECTIVE: To investigate the role of AF in PSCI, especially in relation to other markers of cerebrovascular disease. METHODS: 445 subjects with mild ischemic stroke without pre-stroke cognitive decline were assessed 3-6 months post-stroke for cognitive deficits...
September 7, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28914736/update-on-tauopathies
#3
Thibaud Lebouvier, Florence Pasquier, Luc Buée
PURPOSE OF REVIEW: The purpose of this review is to provide an update on the role of tau beyond the stabilization of microtubules and on the clinical, pathological, diagnostic and therapeutic aspects of tauopathies. RECENT FINDINGS: Beyond its function as a microtubule-associated tau protein, tau is also involved in gene regulation, signal transduction and metabolism. Experimental models allow for the development of new diagnostic and therapeutic tools. Tauopathies encompass different disorders that may manifest with various clinical syndromes...
September 13, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/28912696/swing-boat-inducing-and-recording-locomotor-activity-in-a-drosophila-melanogaster-model-of-alzheimer-s-disease
#4
Johannes Berlandi, Fang-Ju Lin, Oliver Ambrée, Dirk Rieger, Werner Paulus, Astrid Jeibmann
Recent studies indicate that physical activity can slow down progression of neurodegeneration in humans. To date, automated ways to induce activity have been predominantly described in rodent models. To study the impact of activity on behavior and survival in adult Drosophila melanogaster, we aimed to develop a rotating tube device "swing boat" which is capable of monitoring activity and sleep patterns as well as survival rates of flies. For the purpose of a first application, we tested our device on a transgenic fly model of Alzheimer's disease (AD)...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28894607/evaluation-of-cholinergic-deficiency-in-preclinical-alzheimer-s-disease-using-pupillometry
#5
Shaun Frost, Liam Robinson, Christopher C Rowe, David Ames, Colin L Masters, Kevin Taddei, Stephanie R Rainey-Smith, Ralph N Martins, Yogesan Kanagasingam
Cortical cholinergic deficiency is prominent in Alzheimer's disease (AD), and published findings of diminished pupil flash response in AD suggest that this deficiency may extend to the visual cortical areas and anterior eye. Pupillometry is a low-cost, noninvasive technique that may be useful for monitoring cholinergic deficits which generally lead to memory and cognitive disorders. The aim of the study was to evaluate pupillometry for early detection of AD by comparing the pupil flash response (PFR) in AD (N = 14) and cognitively normal healthy control (HC, N = 115) participants, with the HC group stratified according to high (N = 38) and low (N = 77) neocortical amyloid burden (NAB)...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28887919/cassia-tora-linn-a-boon-to-alzheimer-s-disease-for-its-anti-amyloidogenic-and-cholinergic-activities
#6
K R Chethana, Fatma Sezer Senol, Ilkay Erdogan Orhan, K R Anilakumar, Rangappa S Keri
BACKGROUND: Drug discovery from natural products as alternatives for Alzheimer's disease (AD) is a current trend. For which plant is an alternative for searching potential molecule for treating AD. Availability of Cassia tora as weed and abundance in nature makes it as potential source. Many plants group under Leguminosae family has potential medicinal property of which Cassia tora is an appropriate choice, to know potency against AD. Etiology of AD is described by senile plaques and neurofibrillary tangles...
September 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28884572/nanobody-based-apolipoprotein-e-immunosensor-for-point-of-care-testing
#7
Xiang Ren, Junrong Yan, Dan Wu, Qin Wei, Yakun Wan
Alzheimer's disease (AD) biomarkers can reflect the neurochemical indicators used to estimate the risk in clinical nephrology. Apolipoprotein E (ApoE) is an early biomarker for AD in clinical diagnosis. In this research, through bactrian camel immunization, lymphocyte isolation, RNA extraction, and library construction, ApoE-specific Nbs with high affinity were successfully separated from an immune phage display nanobody library. Herein, a colorimetric immunosensor was developed for the point-of-care testing of ApoE by layer-by-layer nanoassembly techniques and novel nanobodies (Nbs)...
September 11, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28884239/nano-composite-foam-sensor-system-in-football-helmets
#8
A Jake Merrell, William F Christensen, Matthew K Seeley, Anton E Bowden, David T Fullwood
American football has both the highest rate of concussion incidences as well as the highest number of concussions of all contact sports due to both the number of athletes and nature of the sport. Recent research has linked concussions with long term health complications such as chronic traumatic encephalopathy and early onset Alzheimer's. Understanding the mechanical characteristics of concussive impacts is critical to help protect athletes from these debilitating diseases and is now possible using helmet-based sensor systems...
September 7, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28883125/defining-optimal-brain-health-in-adults-a-presidential-advisory-from-the-american-heart-association-american-stroke-association
#9
REVIEW
Philip B Gorelick, Karen L Furie, Costantino Iadecola, Eric E Smith, Salina P Waddy, Donald M Lloyd-Jones, Hee-Joon Bae, Mary Ann Bauman, Martin Dichgans, Pamela W Duncan, Meighan Girgus, Virginia J Howard, Ronald M Lazar, Sudha Seshadri, Fernando D Testai, Stephen van Gaal, Kristine Yaffe, Hank Wasiak, Charlotte Zerna
Cognitive function is an important component of aging and predicts quality of life, functional independence, and risk of institutionalization. Advances in our understanding of the role of cardiovascular risks have shown them to be closely associated with cognitive impairment and dementia. Because many cardiovascular risks are modifiable, it may be possible to maintain brain health and to prevent dementia in later life. The purpose of this American Heart Association (AHA)/American Stroke Association presidential advisory is to provide an initial definition of optimal brain health in adults and guidance on how to maintain brain health...
September 7, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28879701/mirnas-expressions-and-interaction-with-biological-systems-in-patients-with-alzheimer-s-disease-using-mirnas-as-a-diagnosis-and-prognosis-biomarker
#10
REVIEW
Silvius I Negoita, Dorel Sandesc, Alexandru F Rogobete, Madalina Dutu, Ovidiu H Bedreag, Marius Papurica, Muhammed F Ercisli, Sonia E Popovici, Raluca Dumache, Mihai Sandesc, Anca Dinu, Adriana M Sas, Denis Serban, Dan Corneci
BACKGROUND: A high percentage of patients develop Alzheimer`s disease (AD). The main signs are loss of memory and cognitive functions which have a significant impact on lifestyle. Numerous studies have been conducted to identify new biomarkers for early diagnosis of patients with AD. An ideal biomarker is represented by the expression of miRNAs. In this paper, we want to summarize expressions miRNAs in AD. We also want to present the pathophysiological and genetic interactions of miRNAs with protein systems in these patients...
September 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28879083/monitoring-disease-progression-in-mild-cognitive-impairment-associations-between-atrophy-patterns-cognition-apoe-and-amyloid
#11
Farshad Falahati, Daniel Ferreira, J-Sebastian Muehlboeck, Maria Eriksdotter, Andrew Simmons, Lars-Olof Wahlund, Eric Westman
BACKGROUND: A disease severity index (SI) for Alzheimer's disease (AD) has been proposed that summarizes MRI-derived structural measures into a single score using multivariate data analysis. OBJECTIVES: To longitudinally evaluate the use of the SI to monitor disease progression and predict future progression to AD in mild cognitive impairment (MCI). Further, to investigate the association between longitudinal change in the SI and cognitive impairment, Apolipoprotein E (APOE) genotype as well as the levels of cerebrospinal fluid amyloid-beta 1-42 (Aβ) peptide...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28877864/internet-searches-and-their-relationship-to-cognitive-function-in-older-adults-cross-sectional-analysis
#12
Johanna Austin, Kristy Hollingshead, Jeffrey Kaye
BACKGROUND: Alzheimer disease (AD) is a very challenging experience for all those affected. Unfortunately, detection of Alzheimer disease in its early stages when clinical treatments may be most effective is challenging, as the clinical evaluations are time-consuming and costly. Recent studies have demonstrated a close relationship between cognitive function and everyday behavior, an avenue of research that holds great promise for the early detection of cognitive decline. One area of behavior that changes with cognitive decline is language use...
September 6, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28874525/differential-diagnosis-of-alzheimer-s-disease-using-spectrochemical-analysis-of-blood
#13
Maria Paraskevaidi, Camilo L M Morais, Kássio M G Lima, Julie S Snowden, Jennifer A Saxon, Anna M T Richardson, Matthew Jones, David M A Mann, David Allsop, Pierre L Martin-Hirsch, Francis L Martin
The progressive aging of the world's population makes a higher prevalence of neurodegenerative diseases inevitable. The necessity for an accurate, but at the same time, inexpensive and minimally invasive, diagnostic test is urgently required, not only to confirm the presence of the disease but also to discriminate between different types of dementia to provide the appropriate management and treatment. In this study, attenuated total reflection FTIR (ATR-FTIR) spectroscopy combined with chemometric techniques were used to analyze blood plasma samples from our cohort...
September 5, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28869474/cortical-metabolic-and-cognitive-correlates-of-disorientation-in-alzheimer-s-disease
#14
Gali H Weissberger, Rebecca J Melrose, Candace M Fanale, Joseph V Veliz, David L Sultzer
Orientation to time, date, and place is commonly utilized in clinical settings to aid in diagnosis, staging, and monitoring of Alzheimer's disease (AD). This study aimed to identify the cerebral metabolic correlates of orientation in patients with AD, and the degree to which regions associated with orientation overlap with memory-related structures. Eighty-five patients with a diagnosis of probable AD underwent fluorodeoxyglucose positron emission tomography (FDG-PET) and neuropsychological testing. Orientation items from the Dementia Rating Scale and recognition performance from the Consortium to Establish a Registry for AD (CERAD) Word List Learning test were correlated with cerebral glucose metabolism...
September 1, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28869463/risk-factors-neuroanatomical-correlates-and-outcome-of-neuropsychiatric-symptoms-of-alzheimer-s-disease
#15
Stéphane P Poulin, David Bergeron, Bradford C Dickerson
BACKGROUND: An integrative model of neuropsychiatric symptoms (NPS) in Alzheimer's disease (AD) is lacking. OBJECTIVE: In this study, we aimed to investigate the risk factors, anatomy, biology, and outcomes of NPS in AD. METHODS: 181 subjects were included from the Alzheimer's Disease Neuroimaging Study (ADNI). NPS were assessed with the Neuropsychiatric Inventory Questionnaire at baseline and 6 months. NPI >3 was used as a threshold for NPS positivity...
September 1, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28864633/correlations-of-18-f-thk5351-pet-with-post-mortem-burden-of-tau-and-astrogliosis-in-alzheimer-s-disease
#16
Ryuichi Harada, Aiko Ishiki, Hideaki Kai, Naomi Sato, Katsutoshi Furukawa, Shozo Furumoto, Tetsuro Tago, Naoki Tomita, Shoichi Watanuki, Kotaro Hiraoka, Yoichi Ishikawa, Yoshihito Funaki, Tadaho Nakamura, Takeo Yoshikawa, Ren Iwata, Manabu Tashiro, Hironobu Sasano, Tetsuyuki Kitamoto, Kazuhiko Yanai, Hiroyuki Arai, Yukitsuka Kudo, Nobuyuki Okamura
Clinical PET studies using (18)F-THK5351 have demonstrated significant tracer retention in sites susceptible to tau burden in Alzheimer's disease (AD). However, the in vivo PET signal to reflect tau aggregates remains controversial. Methods: We examined the spatial pattern of tracer binding, amyloid-β, tau and gliosis in an autopsy-confirmed AD case who underwent (18)F-THK5351 and (11)C-PiB PET before death. Results: Regional in vivo (18)F-THK5351 retention was significantly correlated with the density of tau aggregates in the neocortex and monoamine oxidase-B (MAO-B) in the whole brain, but not correlated with that of insoluble amyloid-β...
September 1, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28857559/rational-design-of-in-vivo-tau-tangle-selective-near-infrared-fluorophores-expanding-the-bodipy-universe
#17
Peter Verwilst, Hye-Ri Kim, Jinho Seo, Nak-Won Sohn, Seung-Yun Cha, Yeongmin Kim, Sungho Maeng, Jung-Won Shin, Jong Hwan Kwak, Chulhun Kang, Jong Seung Kim
The elucidation of the cause of Alzheimer's disease remains one of the greatest questions in neurodegenerative research. The lack of highly reliable low-cost sensors to study the structural changes in key proteins during the progression of the disease is a contributing factor to this lack of insight. In the current work, we describe the rational design and synthesis of two fluorescent BODIPY-based probes, named Tau 1 and Tau 2. The probes were evaluated on the molecular surface formed by a fibril of the PHF6 ((306)VQIVYK(311)) tau fragment using molecular docking studies to provide a potential molecular model to rationalize the selectivity of the new probes as compared to a homologous Aβ-selective probe...
September 15, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28857263/psychosocial-behaviour-management-programme-for-home-dwelling-people-with-dementia-a-cluster-randomized-controlled-trial
#18
REVIEW
Miharu Nakanishi, Kaori Endo, Kayo Hirooka, Eva Granvik, Lennart Minthon, Katarina Nägga, Atsushi Nishida
Little is known about the effectiveness of a psychosocial behaviour management programme on home-dwelling people with dementia. We developed a Behaviour Analytics & Support Enhancement (BASE) programme for care managers and professional caregivers of home care services in Japan. We investigated the effects of BASE on challenging behaviour of home-dwelling people with dementia. METHODS: A cluster-randomized controlled trial was conducted with home care providers from 3 different districts in Tokyo...
August 31, 2017: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28856799/complexity-analysis-of-cortical-surface-detects-changes-in-future-alzheimer-s-disease-converters
#19
Juan Ruiz de Miras, Víctor Costumero, Vicente Belloch, Joaquín Escudero, César Ávila, Jorge Sepulcre
Alzheimer's disease (AD) is a neurological disorder that creates neurodegenerative changes at several structural and functional levels in human brain tissue. The fractal dimension (FD) is a quantitative parameter that characterizes the morphometric variability of the human brain. In this study, we investigate spherical harmonic-based FD (SHFD), thickness, and local gyrification index (LGI) to assess whether they identify cortical surface abnormalities toward the conversion to AD. We study 33 AD patients, 122 mild cognitive impairment (MCI) patients (50 MCI converters and 29 MCI nonconverters), and 32 healthy controls (HC)...
August 30, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28856569/pharmacokinetics-of-cromolyn-and-ibuprofen-in-healthy-elderly-volunteers
#20
David Brazier, Robert Perry, Jim Keane, Katie Barrett, David R Elmaleh
BACKGROUND AND OBJECTIVES: The combination of cromolyn and ibuprofen is being investigated as a treatment for early Alzheimer's disease (AD). This study investigated the pharmacokinetics, safety, and tolerability of cromolyn and ibuprofen co-administration in healthy elderly adult volunteers. METHODS: In this open-labeled study, 26 subjects, aged 55-75 years, received co-administration of inhaled cromolyn (single dose 17.1 mg; double dose 34.2 mg total) and oral ibuprofen (single dose 10 mg; double dose 20 mg total)...
August 30, 2017: Clinical Drug Investigation
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