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https://www.readbyqxmd.com/read/28647411/hippocampal-5-ht1a-receptor-expression-changes-in-prodromal-stages-of-alzheimer-s-disease-beneficial-or-deleterious
#1
REVIEW
M Verdurand, L Zimmer
There is increasing evidence that the serotonergic system is highly dysfunctional in Alzheimer's disease (AD), and this could be related to cognitive impairments associated with dementia. Of the various serotonin receptors, 5-HT1A receptors are relevant to AD as they are highly expressed in the human hippocampus and are known to be involved in the regulation of memory processes. This review will discuss the involvement of 5-HT1A receptors in AD at several levels (post-mortem, in-vivo imaging, animal models)...
June 21, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28644061/diffusion-weighted-magnetic-resonance-imaging-in-the-assessment-of-choroid-plexus-aging
#2
Banu Alicioglu, Guliz Yilmaz, Ozgur Tosun, Nail Bulakbasi
Recent studies have pointed out dysfunction and histopathological changes of the choroid plexuses (CPs) with aging. This paper reviews apparent diffusion coefficient (ADC) values of the CPs for age-related changes. All the brain MR images of the patients between January 2013 and June 2014 in our Radiology Department were retrospectively investigated. Patients with major cranial abnormalities (brain tumors, hyperacute or acute ischemia, developmental anomalies, hemorrhage, hydrocephaly) were excluded. Diffusion-weighted images were obtained at the parameter values of b = 1000 s/mm(2) in the axial plane...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28642699/cerebral-blood-flow-and-amyloid-%C3%AE-interact-to-affect-memory-performance-in-cognitively-normal-older-adults
#3
Katherine J Bangen, Alexandra L Clark, Emily C Edmonds, Nicole D Evangelista, Madeleine L Werhane, Kelsey R Thomas, Lyzette E Locano, My Tran, Zvinka Z Zlatar, Daniel A Nation, Mark W Bondi, Lisa Delano-Wood
Cerebral blood flow (CBF) alterations and amyloid-β (Aβ) accumulation have been independently linked to cognitive deficits in older adults at risk for dementia. Less is known about how CBF and Aβ may interact to affect cognition in cognitively normal older adults. Therefore, we examined potential statistical interactions between CBF and Aβ status in regions typically affected in Alzheimer's disease (AD) within a sample of older adults from the Alzheimer's Disease Neuroimaging Initiative (ADNI) study. Sixty-two cognitively normal participants (mean age = 72 years) underwent neuroimaging and memory testing...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28637402/antioxidant-skq1-alleviates-signs-of-alzheimer-s-disease-like-pathology-in-old-oxys-rats-by-reversing-mitochondrial-deterioration
#4
Nataliya G Kolosova, Mikhail A Tyumentsev, Natalia A Muraleva, Elena Kiseleva, Anton O Vitovtov, Natalia A Stefanova
BACKGROUND: Mitochondrial dysfunction is called the missing link between brain aging and Alzheimer's disease (AD), the most common type of age-related dementia worldwide. Among the most advanced and promising of approaches to prevention or slowing of AD are therapeutic strategies targeting mitochondria. OBJECTIVE: Mitochondria-targeted antioxidant SkQ1 can suppress the development of AD signs, but its therapeutic potential in AD at clinical stages is currently unknown...
June 21, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28632523/frontotemporal-dementia-presenting-as-gambling-disorder-when-a-psychiatric-condition-is-the-clue-to-a-neurodegenerative-disease
#5
Giacomo Tondo, Fabiola De Marchi, Emanuela Terazzi, Marta Sacchetti, Roberto Cantello
Behavioral variant frontotemporal dementia, the most common form of frontotemporal dementia, is characterized by executive dysfunction and changes in personality and behavior, sometimes with associated psychiatric disorders. We report a man who suddenly developed a gambling disorder when he was 55 years old. A year later he developed personality changes of agitation, euphoria, and disinhibition, along with binge eating and dysthymia. He did not improve on paroxetine 40 mg/day. Two years after the onset of his symptoms, he came to our clinic for evaluation...
June 2017: Cognitive and Behavioral Neurology: Official Journal of the Society for Behavioral and Cognitive Neurology
https://www.readbyqxmd.com/read/28631336/a-neuroimaging-approach-to-capture-cognitive-reserve-application-to-alzheimer-s-disease
#6
Anna C van Loenhoud, Alle Meije Wink, Colin Groot, Sander C J Verfaillie, Jos Twisk, Frederik Barkhof, Bart van Berckel, Philip Scheltens, Wiesje M van der Flier, Rik Ossenkoppele
Cognitive reserve (CR) explains interindividual differences in the ability to maintain cognitive function in the presence of neuropathology. We developed a neuroimaging approach including a measure of brain atrophy and cognition to capture this construct. In a group of 511 Alzheimer's disease (AD) biomarker-positive subjects in different stages across the disease spectrum, we performed 3T magnetic resonance imaging and predicted gray matter (GM) volume in each voxel based on cognitive performance (i.e. a global cognitive composite score), adjusted for age, sex, disease stage, premorbid brain size (i...
June 20, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28626050/admission-brain-cortical-volume-an-independent-determinant-of-poststroke-cognitive-vulnerability
#7
Sharmila Sagnier, Gwenaëlle Catheline, Bixente Dilharreguy, Fanny Munsch, Antoine Bigourdan, Mathilde Poli, Sabrina Debruxelles, Stéphane Olindo, Pauline Renou, François Rouanet, Vincent Dousset, Thomas Tourdias, Igor Sibon
BACKGROUND AND PURPOSE: Several markers of poststroke cognitive impairment have been reported. The role of brain cortical volume remains uncertain. The aim of this study was to evaluate the influence of brain cortical volume on cognitive outcomes using a voxel-based morphometry approach in subjects without prestroke dementia. METHODS: Ischemic stroke patients were prospectively recruited 24 to 72 hours post-stroke (M0). Cognition was evaluated at M0, 3 months, and 1 year (M12) using the Montreal Cognitive Assessment, the Isaacs set test, and the Zazzo's cancellation task...
June 16, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28625273/development-of-a-core-outcome-set-for-disease-modification-trials-in-mild-to-moderate-dementia-a-systematic-review-patient-and-public-consultation-and-consensus-recommendations
#8
Lucy Webster, Derek Groskreutz, Anna Grinbergs-Saull, Rob Howard, John T O'Brien, Gail Mountain, Sube Banerjee, Bob Woods, Robert Perneczky, Louise Lafortune, Charlotte Roberts, Jenny McCleery, James Pickett, Frances Bunn, David Challis, Georgina Charlesworth, Katie Featherstone, Chris Fox, Claire Goodman, Roy Jones, Sallie Lamb, Esme Moniz-Cook, Justine Schneider, Sasha Shepperd, Claire Surr, Jo Thompson-Coon, Clive Ballard, Carol Brayne, Orlaith Burke, Alistair Burns, Linda Clare, Peter Garrard, Patrick Kehoe, Peter Passmore, Clive Holmes, Ian Maidment, Fliss Murtagh, Louise Robinson, Gill Livingston
BACKGROUND: There is currently no disease-modifying treatment available to halt or delay the progression of the disease pathology in dementia. An agreed core set of the best-available and most appropriate outcomes for disease modification would facilitate the design of trials and ensure consistency across disease modification trials, as well as making results comparable and meta-analysable in future trials. OBJECTIVES: To agree a set of core outcomes for disease modification trials for mild to moderate dementia with the UK dementia research community and patient and public involvement (PPI)...
May 2017: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/28621768/imaging-and-fluid-biomarkers-in-frontotemporal-dementia
#9
REVIEW
Lieke H Meeter, Laura Donker Kaat, Jonathan D Rohrer, John C van Swieten
Frontotemporal dementia (FTD), the second most common type of presenile dementia, is a heterogeneous neurodegenerative disease characterized by progressive behavioural and/or language problems, and includes a range of clinical, genetic and pathological subtypes. The diagnostic process is hampered by this heterogeneity, and correct diagnosis is becoming increasingly important to enable future clinical trials of disease-modifying treatments. Reliable biomarkers will enable us to better discriminate between FTD and other forms of dementia and to predict disease progression in the clinical setting...
June 16, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28620783/advanced-neuroimaging-of-cerebral-small-vessel-disease
#10
REVIEW
Gordon W Blair, Maria Valdez Hernandez, Michael J Thrippleton, Fergus N Doubal, Joanna M Wardlaw
Cerebral small vessel disease (SVD) is characterised by damage to deep grey and white matter structures of the brain and is responsible for a diverse range of clinical problems that include stroke and dementia. In this review, we describe advances in neuroimaging published since January 2015, mainly with magnetic resonance imaging (MRI), that, in general, are improving quantification, observation and investigation of SVD focussing on three areas: quantifying the total SVD burden, imaging brain microstructural integrity and imaging vascular malfunction...
July 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28620158/clinical-features-and-sleep-analysis-of-chinese-patients-with-fatal-familial-insomnia
#11
Liyong Wu, Hui Lu, Xianling Wang, Jia Liu, Chaoyang Huang, Jing Ye, Cuijiang Li, Jun Lu, Yuping Wang, Jianping Jia, Shuqin Zhan
This study aimed to examine clinical features, sleep, abnormal sleep-wake transition and non-sleep disturbances as well as lab tests in Chinese fatal familial insomnia (FFI) subjects. Patients with confirmed clinical and laboratory diagnosis of FFI have been retrospectively reviewed. The clinical features and the results of the complementary tests, including polysomnography (PSG), brain imaging and genetic analysis, were used. Two male and three female patients were recruited in this study. Three of the five patients had more comprehensive family medical records...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28616381/anosognosia-for-memory-deficits-in-mild-cognitive-impairment-insight-into-the-neural-mechanism-using-functional-and-molecular-imaging
#12
Patrizia Vannini, Bernard Hanseeuw, Catherine E Munro, Rebecca E Amariglio, Gad A Marshall, Dorene M Rentz, Alvaro Pascual-Leone, Keith A Johnson, Reisa A Sperling
Anosognosia, or loss of insight of memory deficits, is a common and striking symptom in Alzheimer's disease (AD). Previous findings in AD dementia patients suggest that anosognosia is due to both functional metabolic changes within cortical midline structures involved in self-referential processes, as well as functional disconnection between these regions. The present study aims to extend these findings by investigating the neural correlates of anosognosia in the prodromal stage of AD. Here, we used regional brain metabolism (resting state 18-F fluorodeoxyglucose positron emission tomography (FDG-PET)) to unravel the metabolic correlates of anosognosia in subjects with amnestic mild cognitive impairment (aMCI) and subsequently resting state functional magnetic resonance imaging (rs-fMRI) to investigate the intrinsic connectivity disruption between brain regions...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28612291/-f-18-av-1451-binding-correlates-with-postmortem-neurofibrillary-tangle-braak-staging
#13
Marta Marquié, Michael Siao Tick Chong, Alejandro Antón-Fernández, Eline E Verwer, Nil Sáez-Calveras, Avery C Meltzer, Prianca Ramanan, Ana C Amaral, Jose Gonzalez, Marc D Normandin, Matthew P Frosch, Teresa Gómez-Isla
[F-18]-AV-1451, a PET tracer specifically developed to detect brain neurofibrillary tau pathology, has the potential to facilitate accurate diagnosis of Alzheimer's disease (AD), staging of brain tau burden and monitoring disease progression. Recent PET studies show that patients with mild cognitive impairment and AD dementia exhibit significantly higher in vivo [F-18]-AV-1451 retention than cognitively normal controls. Importantly, PET patterns of [F-18]-AV-1451 correlate well with disease severity and seem to match the predicted topographic Braak staging of neurofibrillary tangles (NFTs) in AD, although this awaits confirmation...
June 13, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28610695/a-fuzzy-based-system-reveals-alzheimer-s-disease-onset-in-subjects-with-mild-cognitive-impairment
#14
Sabina Tangaro, Annarita Fanizzi, Nicola Amoroso, Roberto Bellotti
Alzheimer's Disease (AD) is the most frequent neurodegenerative form of dementia. Although dementia cannot be cured, it is very important to detect preclinical AD as early as possible. Several studies demonstrated the effectiveness of the joint use of structural Magnetic Resonance Imaging (MRI) and cognitive measures to detect and track the progression of the disease. Since hippocampal atrophy is a well known biomarker for AD progression state, we propose here a novel methodology, exploiting it as a searchlight to detect the best discriminating features for the classification of subjects with Mild Cognitive Impairment (MCI) converting (MCI-c) or not converting (MCI-nc) to AD...
June 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28609533/association-between-elevated-brain-amyloid-and-subsequent-cognitive-decline-among-cognitively-normal-persons
#15
Michael C Donohue, Reisa A Sperling, Ronald Petersen, Chung-Kai Sun, Michael W Weiner, Paul S Aisen
Importance: Among cognitively normal individuals, elevated brain amyloid (defined by cerebrospinal fluid assays or positron emission tomography regional summaries) can be related to risk for later Alzheimer-related cognitive decline. Objective: To characterize and quantify the risk for Alzheimer-related cognitive decline among cognitively normal individuals with elevated brain amyloid. Design, Setting, and Participants: Exploratory analyses were conducted with longitudinal cognitive and biomarker data from 445 cognitively normal individuals in the United States and Canada...
June 13, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28604016/triglycerides-are-negatively-correlated-with-cognitive-function-in-nondemented-aging-adults
#16
Vishnu Parthasarathy, Darvis T Frazier, Brianne M Bettcher, Laura Jastrzab, Linda Chao, Bruce Reed, Dan Mungas, Michael Weiner, Charles DeCarli, Helena Chui, Joel H Kramer
OBJECTIVE: Vascular risk factors like hyperlipidemia may adversely affect brain function. We hypothesized that increased serum triglycerides are associated with decreased executive function and memory in nondemented elderly subjects. We also researched possible vascular mediators and white matter microstructure as assessed with diffusion tensor imaging (DTI). DESIGN/METHOD: Participants were 251 nondemented elderly adults (54% male) with a mean age of 78 (SD = 6...
June 12, 2017: Neuropsychology
https://www.readbyqxmd.com/read/28603769/longitudinal-changes-in-amyloid-positron-emission-tomography-and-volumetric-magnetic-resonance-imaging-in-the-nondemented-down-syndrome-population
#17
Patrick J Lao, Ben L Handen, Tobey J Betthauser, Iulia Mihaila, Sigan L Hartley, Annie D Cohen, Dana L Tudorascu, Peter D Bulova, Brian J Lopresti, Rameshwari V Tumuluru, Dhanabalan Murali, Chester A Mathis, Todd E Barnhart, Charles K Stone, Julie C Price, Darlynne A Devenny, Marsha R Mailick, William E Klunk, Sterling C Johnson, Bradley T Christian
INTRODUCTION: Down syndrome (DS) arises from a triplication of chromosome 21, causing overproduction of the amyloid precursor protein and predisposes individuals to early Alzheimer's disease (AD). METHODS: Fifty-two nondemented adults with DS underwent two cycles of carbon 11-labeled Pittsburgh compound B ([(11)C]PiB) and T1 weighted magnetic resonance imaging (MRI) scans 3.0 ± 0.6 years apart. Standard uptake value ratio (SUVR) images (50-70 minutes; cerebellar gray matter [GM]) and GM volumes were analyzed in standardized space (Montreal Neurological Institute space)...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28601570/agreement-among-neuropsychological-and-behavioral-data-and-pib-findings-in-diagnosing-frontotemporal-dementia
#18
Kelly A Ryan, Dustin Hammers, Angeline DeLeon, Hande Bilen, Kirk Frey, James Burke, Roger Albin, Nancy Barbas, Judith Heidebrink, Bruno Giordani
Diagnostic inaccuracies have been reported in Alzheimer's disease (AD) and Frontotemporal Dementia (FTD) using clinical data alone. The [(11)C]-PiB PET scan offers a new method of identifying AD based on the detection of amyloid deposits. Our study investigated whether there was an agreement between neuropsychological and behavioral data and PiB findings in the diagnosis of FTD. Participants were 32 patients diagnosed with suspected FTD by clinical consensus. All participants underwent neuropsychological testing and PiB imaging...
June 7, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28600299/evaluation-of-optical-coherence-tomography-angiographic-findings-in-alzheimer-s-type-dementia
#19
Mehmet Bulut, Fatma Kurtuluş, Onursal Gözkaya, Muhammet Kazım Erol, Ayşe Cengiz, Melih Akıdan, Aylin Yaman
BACKGROUND/AIMS: To identify the retinal vascular pathologies in patients with Alzheimer's type dementia (ATD) through optical coherence tomography angiography (OCTA) imaging. METHODS: Our study included 26 patients in the patient group, and age-matched and sex-matched 26 subjects in the control group. A detailed ophthalmological and neurological examination was performed for all subjects included in the study. The retinal, choroidal vascular structures and choroidal thickness (CT) of all subjects were analysed in a detailed way with a commercial spectral domain OCTA...
June 9, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28598243/advances-in-arterial-spin-labelling-mri-methods-for-measuring-perfusion-and-collateral-flow
#20
Matthias Jp van Osch, Wouter M Teeuwisse, Zhensen Chen, Yuriko Suzuki, Michael Helle, Sophie Schmid
With the publication in 2015 of the consensus statement by the perfusion study group of the International Society for Magnetic Resonance in Medicine (ISMRM) and the EU-COST action 'ASL in dementia' on the implementation of arterial spin labelling MRI (ASL) in a clinical setting, the development of ASL can be considered to have become mature and ready for clinical prime-time. In this review article new developments and remaining issues will be discussed, especially focusing on quantification of ASL as well as on new technological developments of ASL for perfusion imaging and flow territory mapping...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
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