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https://www.readbyqxmd.com/read/28927263/molecular-and-cellular-basis-of-neurodegeneration-in-alzheimer-s-disease
#1
Sangyun Jeong
The most common form of senile dementia is Alzheimer's disease (AD), which is characterized by the extracellular deposition of amyloid beta-peptide (Abeta) plaques and the intracellular formation of neurofibrillary tangles (NFTs) in the cerebral cortex. Tau abnormalities are commonly observed in many neurodegenerative diseases including AD, Parkinson's disease, and Pick's disease. Interestingly, tau-mediated formation of NFTs in AD brains shows better correlation with cognitive impairment than Abeta plaque accumulation; pathological tau alone is sufficient to elicit frontotemporal dementia, but it does not cause AD...
September 20, 2017: Molecules and Cells
https://www.readbyqxmd.com/read/28926416/blood-pressure-variability-and-cognitive-function-among-older-african-americans-introducing-a-new-blood-pressure-variability-measure
#2
Siny Tsang, Scott A Sperling, Moon Ho Park, Ira M Helenius, Ishan C Williams, Carol Manning
BACKGROUND: Although blood pressure (BP) variability has been reported to be associated with cognitive impairment, whether this relationship affects African Americans has been unclear. We sought correlations between systolic and diastolic BP variability and cognitive function in community-dwelling older African Americans, and introduced a new BP variability measure that can be applied to BP data collected in clinical practice. METHODS: We assessed cognitive function in 94 cognitively normal older African Americans using the Mini-Mental State Examination (MMSE) and the Computer Assessment of Mild Cognitive Impairment (CAMCI)...
September 2017: Cognitive and Behavioral Neurology: Official Journal of the Society for Behavioral and Cognitive Neurology
https://www.readbyqxmd.com/read/28926415/semantic-memory-in-the-clinical-progression-of-alzheimer-disease
#3
Christophe T Tchakoute, Kristin L Sainani, And Victor W Henderson
BACKGROUND AND OBJECTIVE: Semantic memory measures may be useful in tracking and predicting progression of Alzheimer disease. We investigated relationships among semantic memory tasks and their 1-year predictive value in women with Alzheimer disease. METHODS: We conducted secondary analyses of a randomized clinical trial of raloxifene in 42 women with late-onset mild-to-moderate Alzheimer disease. We assessed semantic memory with tests of oral confrontation naming, category fluency, semantic recognition and semantic naming, and semantic density in written narrative discourse...
September 2017: Cognitive and Behavioral Neurology: Official Journal of the Society for Behavioral and Cognitive Neurology
https://www.readbyqxmd.com/read/28926091/functional-role-of-mesenchymal-stem-cells-in-the-treatment-of-chronic-neurodegenerative-diseases
#4
Debora Lo Furno, Giuliana Mannino, Rosario Giuffrida
Mesenchymal stem cells (MSCs) can differentiate into not only cells of mesodermal lineages, but also into endodermal and ectodermal derived elements, including neurons and glial cells. For this reason, MSCs have been extensively investigated to develop cell-based therapeutic strategies, especially in pathologies whose pharmacological treatments give poor results, if any. As in the case of irreversible neurological disorders characterized by progressive neuronal death, in which behavioral and cognitive functions of patients inexorably decline as the disease progresses...
September 19, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28925645/vitamin-b12-deficiency-recognition-and-management
#5
Robert C Langan, Andrew J Goodbred
Vitamin B12 deficiency is a common cause of megaloblastic anemia, various neuropsychiatric symptoms, and other clinical manifestations. Screening average-risk adults for vitamin B12 deficiency is not recommended. Screening may be warranted in patients with one or more risk factors, such as gastric or small intestine resections, inflammatory bowel disease, use of metformin for more than four months, use of proton pump inhibitors or histamine H2 blockers for more than 12 months, vegans or strict vegetarians, and adults older than 75 years...
September 15, 2017: American Family Physician
https://www.readbyqxmd.com/read/28925347/positive-psychosocial-factors-and-cognition-in-ethnically-diverse-older-adults
#6
Laura B Zahodne, Caitlin W-M Watson, Sonia Seehra, Michelle N Martinez
OBJECTIVES: Cross-sectional and longitudinal evidence from largely non-Hispanic White cohorts suggests that positive psychosocial factors, particularly self-efficacy and social support, may protect against late-life cognitive decline. Identifying potentially protective factors in racial/ethnic minority elders is of high importance due to their increased risk of Alzheimer's disease. The overall goal of this study was to characterize cross-sectional associations between positive psychosocial factors and cognitive domains among Black, Hispanic, and White older adults...
September 19, 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/28925333/depression-and-cognitive-function-in-mild-cognitive-impairment-a-1-year-follow-up-study
#7
Seoyoung Yoon, Cheolmin Shin, Changsu Han
BACKGROUND: The coexistence of depression with mild cognitive impairment (MCI) seems to increase the risk of dementia. However, the explanations of that relationship have been inconsistent. We investigated cognitive profiles in patients with MCI with and without depression and whether changes in depression symptoms affect cognition longitudinally. METHODS: For the study, 161 patients with MCI were divided into a depressed group (D+) and a nondepressed group (D-)...
September 2017: Journal of Geriatric Psychiatry and Neurology
https://www.readbyqxmd.com/read/28924681/family-caregivers-to-adults-with-cancer-the-consequences-of-caring
#8
Anna-Leila Williams
A person living with cancer will potentially have some degree of physical, cognitive, and/or psychological impairment, periods of unemployment, financial concerns, social isolation, and existential questions, any or all of which can impact the family and friends who surround them. In our current era of health care, patients with cancer receive invasive diagnostic studies and aggressive treatment as outpatients, and then convalesce at home. As such, cancer family caregivers are de facto partners with the healthcare team...
2018: Recent Results in Cancer Research
https://www.readbyqxmd.com/read/28924232/infection-of-microglia-with-porphyromonas-gingivalis-promotes-cell-migration-and-an-inflammatory-response-through-the-gingipain-mediated-activation-of-protease-activated-receptor-2-in-mice
#9
Yicong Liu, Zhou Wu, Yurika Nakanishi, Junjun Ni, Yoshinori Hayashi, Fumiko Takayama, Yanmin Zhou, Tomoko Kadawaki, Hiroshi Nakanishi
Despite a clear correlation between periodontitis and cognitive decline in Alzheimer's disease, the precise mechanism underlying the relationship remains unclear. The periodontal pathogen Porphyromonas gingivalis produces a unique class of cysteine proteinases termed gingipains that comprises Arg-gingipain (Rgp) and Lys-gingipain (Kgp). Rgp and Kgp are important in the bacterial mediated host cell responses and the subsequent intracellular signaling in infected cells. In the present study, we attempted to clarify the potential effects of Rgp and Kgp on the cellular activation of brain-resident microglia...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28923533/subjective-memory-complaints-are-associated-with-brain-activation-supporting-successful-memory-encoding
#10
Jessica M Hayes, Lingfei Tang, Raymond P Viviano, Sanneke van Rooden, Noa Ofen, Jessica S Damoiseaux
Subjective memory complaints, the perceived decline in cognitive abilities in the absence of clinical deficits, may precede Alzheimer's disease. Individuals with subjective memory complaints show differential brain activation during memory encoding; however, whether such differences contribute to successful memory formation remains unclear. Here, we investigated how subsequent memory effects, activation which is greater for hits than misses during an encoding task, differed between healthy older adults aged 50 to 85 years with (n = 23) and without (n = 41) memory complaints...
August 24, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28923532/cognitive-trajectories-in-relation-to-hospitalization-among-older-swedish-adults
#11
Jenny Hallgren, Eleonor I Fransson, Chandra A Reynolds, Deborah Finkel, Nancy L Pedersen, Anna K Dahl Aslan
INTRODUCTION: Research indicate that cognitive impairment might be related to hospitalization, but little is known about these effects over time. OBJECTIVE: To assess cognitive change before and after hospitalization among older adults in a population-based longitudinal study with up to 25 years of follow-up. METHOD: A longitudinal study on 828 community living men and women aged 50-86 from the Swedish Adoption/Twin Study of Ageing (SATSA) were linked to The Swedish National Inpatient Register...
September 9, 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28923099/whole-blood-gene-expression-and-white-matter-hyperintensities
#12
Honghuang Lin, Claudia Satizabal, Zhijun Xie, Qiong Yang, Tianxiao Huan, Roby Joehanes, Chengping Wen, Peter J Munson, Alexa Beiser, Daniel Levy, Sudha Seshadri
BACKGROUND: White matter hyperintensities (WMH) are an important biomarker of cumulative vascular brain injury and have been associated with cognitive decline and an increased risk of dementia, stroke, depression, and gait impairments. The pathogenesis of white matter lesions however, remains uncertain. The characterization of gene expression profiles associated with WMH might help uncover molecular mechanisms underlying WMH. METHODS: We performed a transcriptome-wide association study of gene expression profiles with WMH in 3248 participants from the Framingham Heart Study using the Affymetrix Human Exon 1...
September 18, 2017: Molecular Neurodegeneration
https://www.readbyqxmd.com/read/28922421/effects-of-acute-administration-of-donepezil-or-memantine-on-sleep-deprivation-induced-spatial-memory-deficit-in-young-and-aged-non-human-primate-grey-mouse-lemurs-microcebus-murinus
#13
Anisur Rahman, Yves Lamberty, Esther Schenker, Massimo Cella, Solène Languille, Régis Bordet, Jill Richardson, Fabien Pifferi, Fabienne Aujard
The development of novel therapeutics to prevent cognitive decline of Alzheimer's disease (AD) is facing paramount difficulties since the translational efficacy of rodent models did not resulted in better clinical results. Currently approved treatments, including the acetylcholinesterase inhibitor donepezil (DON) and the N-methyl-D-aspartate antagonist memantine (MEM) provide marginal therapeutic benefits to AD patients. There is an urgent need to develop a predictive animal model that is phylogenetically proximal to humans to achieve better translation...
2017: PloS One
https://www.readbyqxmd.com/read/28922167/statins-and-cognition-in-parkinson-s-disease
#14
Benjamin L Deck, Jacqueline Rick, Sharon X Xie, Alice Chen-Plotkin, John E Duda, James F Morley, Lana M Chahine, Nabila Dahodwala, John Q Trojanowski, Daniel Weintraub
The relationship between statins and cognition in Parkinson's disease (PD) is poorly understood. Analyses were performed to determine associations between statin use and cross-sectional and longitudinal cognitive performance in PD. Neuropsychological tests, medication logs, and ratings of functional abilities were collected from 313 PD participants longitudinally. At baseline, statin users (SU; N = 129) were older, more likely male, and had shorter PD duration than non-statin users (NSU; N = 184). In Cross-sectional analysis, SU performed better on global cognition, Trails B, semantic fluency, and phonemic fluency tasks...
September 11, 2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28922163/bilingualism-and-cognitive-decline-a-story-of-pride-and-prejudice
#15
Evy Woumans, Jan Versijpt, Anne Sieben, Patrick Santens, Wouter Duyck
In a recent review, Mukadam, Sommerlad, and Livingston (2017) argue that bilingualism offers no protection against cognitive decline. The authors examined the results of 13 studies (five prospective, eight retrospective) in which monolinguals and bilinguals were compared for cognitive decline and onset of dementia symptoms. Analysis of four of the five prospective studies resulted in the conclusion that there was no difference between monolinguals and bilinguals, whereas seven of the eight retrospective studies actually showed bilingualism to result in a four-to-five year delay of symptom onset...
September 11, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28922158/tailored-and-adaptive-computerized-cognitive-training-in-older-adults-at-risk-for-dementia-a-randomized-controlled-trial
#16
Alex Bahar-Fuchs, Shannon Webb, Lauren Bartsch, Linda Clare, George Rebok, Nicolas Cherbuin, Kaarin J Anstey
BACKGROUND: Computerized Cognitive Training (CCT) has been shown to improve cognitive function in older adults with mild cognitive impairment (MCI) or mood-related neuropsychiatric symptoms (MrNPS), but many questions remain unresolved. OBJECTIVE: To evaluate the extent to which CCT benefits older adults with both MCI and MrNPS, and its effects on meta-cognitive and non-cognitive outcomes, as well as establish whether adapting difficulty levels and tailoring to individuals' profile is superior to generic training...
September 11, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28922154/atrial-fibrillation-is-independently-associated-with-cognitive-impairment-after-ischemic-stroke
#17
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/28922153/sex-dependent-associations-of-serum-uric-acid-with-brain-function-during-aging
#18
Alexandra M Kueider, Yang An, Toshiko Tanaka, Melissa H Kitner-Triolo, Stephanie Studenski, Luigi Ferrucci, Madhav Thambisetty
Serum uric acid (SUA) is an abundant natural antioxidant which could reduce the burden of cellular oxidation, a major cause of neurodegenerative disease. In line with this, SUA levels are lower in those with Alzheimer's disease; however, the association between SUA and cognition remains unclear. Results from studies examining the effects of SUA on cognition may be difficult to interpret in the context of normal versus pathological aging. This study examined sex-specific associations of baseline SUA with cognition during aging...
September 8, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28920863/white-matter-microstructure-and-cognitive-decline-in-metabolic-syndrome-a-review-of-diffusion-tensor-imaging
#19
REVIEW
Freddy J Alfaro, Anna Gavrieli, Patricia Saade, Vasileios-Arsenios Lioutas, Jagriti Upadhyay, Vera Novak
Metabolic syndrome is a cluster of cardiovascular risk factors defined by the presence of abdominal obesity, glucose intolerance, hypertension and/or dyslipidemia. It is a major public health epidemic worldwide, and a known risk factor for the development of cognitive dysfunction and dementia. Several studies have demonstrated a positive association between the presence of metabolic syndrome and worse cognitive outcomes, however, evidence of brain structure pathology is limited. Diffusion tensor imaging has offered new opportunities to detect microstructural white matter changes in metabolic syndrome, and a possibility to detect associations between functional and structural abnormalities...
September 8, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28920567/electronic-devices-for-cognitive-impairment-screening-a-systematic-literature-review
#20
J Antonio García-Casal, Manuel Franco-Martín, M Victoria Perea-Bartolomé, J Miguel Toribio-Guzmán, Carlos García-Moja, Miguel Goñi-Imizcoz, Emese Csipke
OBJECTIVES: The reduction in cognitive decline depends on timely diagnosis. The aim of this systematic review was to analyze the current available information and communication technologies-based instruments for cognitive decline early screening and detection in terms of usability, validity, and reliability. METHODS: Electronic searches identified 1,785 articles of which thirty-four met the inclusion criteria and were grouped according to their main purpose into test batteries, measures of isolated tasks, behavioral measures, and diagnostic tools...
September 18, 2017: International Journal of Technology Assessment in Health Care
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