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https://www.readbyqxmd.com/read/29229199/microbiota-and-aging-a-review-and-commentary
#1
REVIEW
Carmen García-Peña, Teresa Álvarez-Cisneros, Ricardo Quiroz-Baez, Robert P Friedland
Although there is a consensus that the dominant species that make up the adult microbiota remains unchanged in elderly people, it has been reported that there are significant alterations in the proportion and composition of the different taxa, leading to reduced microbiota diversity, as well as an increase of enteropathogens that may lead to chronic inflammation. The ageing of mucosal immune and motor systems also contributes to these changes. As the individual ages, there is a loss in the number of Peyer's patches, an altered local capacity of T and B cell functions as well as chronic macrophage activation...
December 8, 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/29222544/association-of-age-related-hearing-loss-with-cognitive-function-cognitive-impairment-and-dementia-a-systematic-review-and-meta-analysis
#2
David G Loughrey, Michelle E Kelly, George A Kelley, Sabina Brennan, Brian A Lawlor
Importance: Epidemiologic research on the possible link between age-related hearing loss (ARHL) and cognitive decline and dementia has produced inconsistent results. Clarifying this association is of interest because ARHL may be a risk factor for outcomes of clinical dementia. Objectives: To examine and estimate the association between ARHL and cognitive function, cognitive impairment, and dementia through a systematic review and meta-analysis. Data Sources and Study Selection: A search of PubMed, the Cochrane Library, EMBASE, and SCOPUS from inception to April 15, 2016, with cross-referencing of retrieved studies and personal files for potentially eligible studies was performed...
December 7, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/29214153/alzheimer-s-disease-diagnosis-discrepancy-between-clinical-neuroimaging-and-cerebrospinal-fluid-biomarkers-criteria-in-an-italian-cohort-of-geriatric-outpatients-a-retrospective-cross-sectional-study
#3
Giulia A M Dolci, Sarah Damanti, Valeria Scortichini, Alessandro Galli, Paolo D Rossi, Carlo Abbate, Beatrice Arosio, Daniela Mari, Andrea Arighi, Giorgio G Fumagalli, Elio Scarpini, Silvia Inglese, Maura Marcucci
Background: The role of cerebrospinal fluid (CSF) biomarkers, and neuroimaging in the diagnostic process of Alzheimer's disease (AD) is not clear, in particular in the older patients. Objective: The aim of this study was to compare the clinical diagnosis of AD with CSF biomarkers and with cerebrovascular damage at neuroimaging in a cohort of geriatric patients. Methods: Retrospective analysis of medical records of ≥65-year-old patients with cognitive impairment referred to an Italian geriatric outpatient clinic, for whom the CSF concentration of amyloid-β (Aβ), total Tau (Tau), and phosphorylated Tau (p-Tau) was available...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/29213519/language-and-communication-non-pharmacological-interventions-in-patients-with-alzheimer-s-disease-a-systematic-review-communication-intervention-in-alzheimer
#4
Aline Nunes da Cruz Morello, Tatiane Machado Lima, Lenisa Brandão
Alzheimer's disease considerably compromises communication skills. Language changes become more prominent as the disease progresses. Deterioration of language and cognition reduces the ability of holding conversations, which has a negative impact on social interaction. OBJECTIVE: To conduct a systematic review of the literature for articles reporting interventions focused on the language and communication of people with Alzheimer's disease (AD) without use of medication. METHODS: We performed a search using the keywords Alzheimer's disease, language, communication, cognition, cognitive intervention, rehabilitation and therapy, and their corresponding Portuguese and Spanish terms, on the SciELO, LILACS, PubMed and PsychINFO databases...
July 2017: Dementia & Neuropsychologia
https://www.readbyqxmd.com/read/29212555/study-partners-should-be-required-in-preclinical-alzheimer-s-disease-trials
#5
REVIEW
Joshua D Grill, Jason Karlawish
BACKGROUND: In an effort to intervene earlier in Alzheimer's disease (AD), clinical trials are testing promising candidate therapies in preclinical disease. Preclinical AD trial participants are cognitively normal, functionally independent, and autonomous decision-makers. Yet, like AD dementia trials, preclinical trials require dual enrollment of a participant and a knowledgeable informant, or study partner. MAIN TEXT: The requirement of dyadic enrollment is a barrier to recruitment and may present unique ethical challenges...
December 6, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/29203084/the-impact-of-genetic-counselors-use-of-facilitative-strategies-on-cognitive-and-emotional-processing-of-genetic-risk-disclosure-for-alzheimer-s-disease
#6
Yue Guan, Debra L Roter, Jennifer L Wolff, Laura N Gitlin, Kurt D Christensen, J Scott Roberts, Robert C Green, Lori H Erby
OBJECTIVES: To determine the impact of genetic counselor (GC) communication on cognitive and emotional processing of Alzheimer's disease (AD) risk information during discussions with patients with clinical diagnoses of mild cognitive impairment and their companion. METHODS: 79 recordings and transcripts of AD risk disclosure sessions collected as part of the fourth REVEAL Trial were coded using the Roter Interaction Analysis System (RIAS) and the Linguistic Inquiry Word Count (LIWC)...
November 27, 2017: Patient Education and Counseling
https://www.readbyqxmd.com/read/29201645/promoter-haplotypes-of-interleukin-10-gene-linked-to-cortex-plasticity-in-subjects-with-risk-of-alzheimer-s-disease
#7
Feng Bai, Chunming Xie, Yonggui Yuan, Yongmei Shi, Zhijun Zhang
The Alzheimer's disease (AD) aetiologic event is associated with brain inflammatory processes. In this study, we consider a haplotype of the IL-10 gene promoter region, - 1082A/- 819 T/- 592A (ATA haplotype), which is an additive and independent genetic risk factor for AD. Episodic memory change is the most striking cognitive alteration in AD. It remains unclear whether episodic memory networks can be affected by the ATA haplotype variant in amnestic mild cognitive impairment (aMCI), and if so, how this occurs...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29185187/extracellular-vesicle-biology-in-alzheimer-s-disease-and-related-tauopathy
#8
REVIEW
Annina M DeLeo, Tsuneya Ikezu
Extracellular vesicles (EVs) are physiological vesicles secreted from most eukaryotes and contain cargos of their cell of origin. EVs, and particularly a subset of EV known as exosomes, are emerging as key mediators of cell to cell communication and waste management for cells both during normal organismal function and in disease. In this review, we investigate the rapidly growing field of exosome biology, their biogenesis, cargo loading, and uptake by other cells. We particularly consider the role of exosomes in Alzheimer's disease, both as a pathogenic agent and as a disease biomarker...
November 28, 2017: Journal of Neuroimmune Pharmacology: the Official Journal of the Society on NeuroImmune Pharmacology
https://www.readbyqxmd.com/read/29175959/disrupted-neuro-glial-metabolic-coupling-after-peripheral-surgery
#9
Teresa Femenía, Alfredo Giménez-Cassina, Simone Codeluppi, Teresa Fernández-Zafra, Yurika Katsu-Jiménez, Niccolò Terrando, Lars I Eriksson, Marta Gómez-Galán
Immune-related events in the periphery can remotely affect brain function, contributing to neurodegenerative processes and cognitive decline. In mice, peripheral surgery induces a systemic inflammatory response associated with changes in hippocampal synaptic plasticity and transient cognitive decline, however the underlying mechanisms remain unknown. Here we investigated the effect of peripheral surgery on neuronal-glial function within hippocampal neuronal circuits of relevance to cognitive processing in male mice at 6, 24, and 72h post-surgery...
November 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29164603/18f-pet-with-florbetapir-for-the-early-diagnosis-of-alzheimer-s-disease-dementia-and-other-dementias-in-people-with-mild-cognitive-impairment-mci
#10
REVIEW
Gabriel Martínez, Robin Wm Vernooij, Paulina Fuentes Padilla, Javier Zamora, Xavier Bonfill Cosp, Leon Flicker
BACKGROUND: 18F-florbetapir uptake by brain tissue measured by positron emission tomography (PET) is accepted by regulatory agencies like the Food and Drug Administration (FDA) and the European Medicine Agencies (EMA) for assessing amyloid load in people with dementia. Its added value is mainly demonstrated by excluding Alzheimer's pathology in an established dementia diagnosis. However, the National Institute on Aging and Alzheimer's Association (NIA-AA) revised the diagnostic criteria for Alzheimer's disease and confidence in the diagnosis of mild cognitive impairment (MCI) due to Alzheimer's disease may be increased when using amyloid biomarkers tests like 18F-florbetapir...
November 22, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29164602/18f-pet-with-flutemetamol-for-the-early-diagnosis-of-alzheimer-s-disease-dementia-and-other-dementias-in-people-with-mild-cognitive-impairment-mci
#11
REVIEW
Gabriel Martínez, Robin Wm Vernooij, Paulina Fuentes Padilla, Javier Zamora, Leon Flicker, Xavier Bonfill Cosp
BACKGROUND: 18F-flutemetamol uptake by brain tissue, measured by positron emission tomography (PET), is accepted by regulatory agencies like the Food and Drug Administration (FDA) and the European Medicine Agencies (EMA) for assessing amyloid load in people with dementia. Its added value is mainly demonstrated by excluding Alzheimer's pathology in an established dementia diagnosis. However, the National Institute on Aging and Alzheimer's Association (NIA-AA) revised the diagnostic criteria for Alzheimer's disease and the confidence in the diagnosis of mild cognitive impairment (MCI) due to Alzheimer's disease may be increased when using some amyloid biomarkers tests like 18F-flutemetamol...
November 22, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29164600/18f-pet-with-florbetaben-for-the-early-diagnosis-of-alzheimer-s-disease-dementia-and-other-dementias-in-people-with-mild-cognitive-impairment-mci
#12
REVIEW
Gabriel Martínez, Robin Wm Vernooij, Paulina Fuentes Padilla, Javier Zamora, Leon Flicker, Xavier Bonfill Cosp
BACKGROUND: 18F-florbetaben uptake by brain tissue, measured by positron emission tomography (PET), is accepted by regulatory agencies like the Food and Drug Administration (FDA) and the European Medicine Agencies (EMA) for assessing amyloid load in people with dementia. Its added value is mainly demonstrated by excluding Alzheimer's pathology in an established dementia diagnosis. However, the National Institute on Aging and Alzheimer's Association (NIA-AA) revised the diagnostic criteria for Alzheimer's disease and confidence in the diagnosis of mild cognitive impairment (MCI) due to Alzheimer's disease may be increased when using some amyloid biomarkers tests like 18F-florbetaben...
November 22, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29164314/cross-national-gender-variations-of-digit-ratio-2d-4d-correlate-with-life-expectancy-suicide-rate-and-other-causes-of-death
#13
Bernd Lenz, Johannes Kornhuber
The second-to-fourth finger length ratio (2D:4D) is an indication of prenatal sex hormone exposure, and has sex-specifically been associated with several lethal illnesses including ischemic heart disease, diverse cancers, and suicide. Our primary aim was to verify that 2D:4D sex-specifically relates to life expectancy and suicide numbers on a national level (23 countries). We also used a hypothesis-free approach to investigate associations with other causes of death [p value adjustment for multiple hypothesis testing using the false discovery rate procedure (FDR)]...
November 21, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/29163138/perspective-insights-into-disease-progression-diagnostics-and-therapeutic-approaches-in-alzheimer-s-disease-a-judicious-update
#14
REVIEW
Arif Tasleem Jan, Mudsser Azam, Safikur Rahman, Angham M S Almigeiti, Duk Hwan Choi, Eun Ju Lee, Qazi Mohd Rizwanul Haq, Inho Choi
Alzheimer's disease (AD) is a neurodegenerative disorder characterized by the progressive accumulation of β-amyloid fibrils and abnormal tau proteins in and outside of neurons. Representing a common form of dementia, aggravation of AD with age increases the morbidity rate among the elderly. Although, mutations in the ApoE4 act as potent risk factors for sporadic AD, familial AD arises through malfunctioning of APP, PSEN-1, and-2 genes. AD progresses through accumulation of amyloid plaques (Aβ) and neurofibrillary tangles (NFTs) in brain, which interfere with neuronal communication...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29160858/hyperplanar-morphological-clustering-of-a-hippocampus-by-using-volumetric-computerized-tomography-in-early-alzheimer-s-disease
#15
Sarawut Suksuphew, Paramate Horkeaw
Background: On diagnosing Alzheimer's disease (AD), most existing imaging-based schemes have relied on analyzing the hippocampus and its peripheral structures. Recent studies have confirmed that volumetric variations are one of the primary indicators in differentiating symptomatic AD from healthy aging. In this study, we focused on deriving discriminative shape-based parameters that could effectively identify early AD from volumetric computerized tomography (VCT) delineation, which was previously almost intangible...
November 21, 2017: Brain Sciences
https://www.readbyqxmd.com/read/29159197/donepezil-enhances-understanding-of-degraded-speech-in-alzheimer-s-disease
#16
Chris J D Hardy, Yun T Hwang, Rebecca L Bond, Charles R Marshall, Basil H Ridha, Sebastian J Crutch, Martin N Rossor, Jason D Warren
Auditory dysfunction under complex, dynamic listening conditions is a clinical hallmark of Alzheimer's disease (AD) but challenging to measure and manage. Here, we assessed understanding of sinewave speech (a paradigm of degraded speech perception) and general cognitive abilities in 17 AD patients, before and following a 10 mg dose of donepezil. Relative to healthy older individuals, patients had impaired sinewave speech comprehension that was selectively ameliorated by donepezil. Our findings demonstrate impaired perception of degraded speech in AD but retained perceptual learning capacity that can be harnessed by acetylcholinesterase inhibition, with implications for designing communication interventions and acoustic environments in dementia...
November 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/29142396/antioxidant-and-cholinesterase-inhibitory-activities-of-ethyl-acetate-extract-of-terminalia-chebula-cell-free-in-vitro-and-in-silico-studies
#17
Mohamed Asik Rajmohamed, Suganthy Natarajan, Premkumar Palanisamy, Akbarsha Mohammad Abdulkader, Archunan Govindaraju
Background: Alzheimer's disease (AD) is a progressive neurodegenerative disorder clinically characterized by memory loss and impaired cognitive function. Cholinergic enzyme deficiency and oxidative stress are the two major factors implicated in the pathogenesis of AD. The symptomatic treatment, as of now, is the use of cholinesterase inhibitors toward cholinergic "downturn." Therefore, there is a search for compounds that will be useful in focused therapies. There has been suggestion that Terminalia chebula fruit would be a potential source...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29137922/extracellular-vesicles-in-neurodegenerative-diseases
#18
REVIEW
Tommaso Croese, Roberto Furlan
Extracellular vesicles (EVs) are released by all neural cells, including neurons, oligodendrocytes, astrocytes, and microglia. The lack of adequate technology has not halted neuroscientists from investigating EVs as a mean to decipher neurodegenerative disorders, still in search of comprehensible pathogenic mechanisms and efficient treatment. EVs are thought to be one of ways neurodegenerative pathologies spread in the brain, but also one of the ways the brain tries to displace toxic proteins, making their meaning in pathogenesis uncertain...
November 11, 2017: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/29136110/meta-connectomic-analysis-reveals-commonly-disrupted-functional-architectures-in-network-modules-and-connectors-across-brain-disorders
#19
Zhiqiang Sha, Mingrui Xia, Qixiang Lin, Miao Cao, Yanqing Tang, Ke Xu, Haiqing Song, Zhiqun Wang, Fei Wang, Peter T Fox, Alan C Evans, Yong He
Neuropsychiatric disorders are increasingly conceptualized as disconnection syndromes that are associated with abnormal network integrity in the brain. However, whether different neuropsychiatric disorders show commonly dysfunctional connectivity architectures in large-scale brain networks remains largely unknown. Here, we performed a meta-connectomic study to identify disorder-related functional modules and brain regions by combining meta-analyses of 182 published resting-state functional MRI studies in 11 neuropsychiatric disorders and graph-theoretical analyses of 3 independent resting-state functional MRI datasets with healthy and diseased populations (Alzheimer's disease and major depressive disorder [MDD])...
November 9, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/29130504/mass-spectrometry-based-metabolomics-targeting-the-crosstalk-between-gut-microbiota-and-brain-in-neurodegenerative-disorders
#20
REVIEW
Hemi Luan, Xian Wang, Zongwei Cai
Metabolomics seeks to take a "snapshot" in a time of the levels, activities, regulation and interactions of all small molecule metabolites in response to a biological system with genetic or environmental changes. The emerging development in mass spectrometry technologies has shown promise in the discovery and quantitation of neuroactive small molecule metabolites associated with gut microbiota and brain. Significant progress has been made recently in the characterization of intermediate role of small molecule metabolites linked to neural development and neurodegenerative disorder, showing its potential in understanding the crosstalk between gut microbiota and the host brain...
November 12, 2017: Mass Spectrometry Reviews
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