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https://www.readbyqxmd.com/read/27886007/sleep-wake-profile-in-dementia-with-lewy-bodies-alzheimer-s-disease-and-normal-aging
#1
Annachiara Cagnin, Federica Fragiacomo, Giulia Camporese, Matteo Turco, Cinzia Bussè, Mario Ermani, Sara Montagnese
BACKGROUND: Alterations of the sleep-wake cycle are common features of neurodegenerative dementia. OBJECTIVES: To study differences in sleep-wake profiles in dementia with Lewy bodies (DLB), Alzheimer's disease (AD), and healthy controls. METHODS: 30 DLB and 32 AD patients, and 33 healthy elderly participants were studied. Patients were evaluated for global cognitive impairment, extrapyramidal signs, fluctuations of attention, and behavioral disorders...
November 19, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27884130/a-profile-of-the-clinical-course-of-cognition-and-comorbidity-in-mild-cognitive-impairment-and-dementia-study-the-4c-study-two-complementary-longitudinal-clinical-cohorts-in-the-netherlands
#2
Weiqi Liao, Renske E G Hamel, Marcel G M Olde Rikkert, Saskia M Oosterveld, Pauline Aalten, Frans R J Verhey, Philip Scheltens, Nicole Sistermans, Yolande A L Pijnenburg, Wiesje M van der Flier, Inez H G B Ramakers, René J F Melis
BACKGROUND: Heterogeneous disease trajectories of mild cognitive impairment (MCI) and dementia are frequently encountered in clinical practice, but there is still insufficient knowledge to understand the reasons and mechanisms causing this heterogeneity. In addition to correlates of the disorder, patient characteristics such as their health status, social environment, comorbidities and frailty may contribute to variability in trajectories over time. The current paper outlines the study design and the study population of and provides an overview of the data collected in the Clinical Course of Cognition and Comorbidity in Mild Cognitive Impairment (4C-MCI cohort, n = 315) and Dementia (4C-Dementia cohort, n = 331) Study...
November 25, 2016: BMC Neurology
https://www.readbyqxmd.com/read/27866729/molecular-imaging-in-the-diagnosis-of-alzheimer-s-disease-and-related-disorders
#3
REVIEW
L Koric, E Guedj, M O Habert, F Semah, P Branger, P Payoux, F Le Jeune
INTRODUCTION: The diagnosis of Alzheimer's disease (AD) and its related disorders rely on clinical criteria. There is, however, a large clinical overlap between the different neurodegenerative diseases affecting cognition and, frequently, there are diagnostic uncertainties with atypical clinical presentations. Current clinical practices can now regularly use positron emission tomography (PET) and single-photon emission computed tomography (SPECT) molecular imaging to help resolve such uncertainties...
November 17, 2016: Revue Neurologique
https://www.readbyqxmd.com/read/27806872/all-trans-retinoic-acid-atra-prevents-lipopolysaccharide-induced-neuroinflammation-amyloidogenesis-and-memory-impairment-in-aged-rats
#4
Nassima Behairi, Mourad Belkhelfa, Hayet Rafa, Moussa Labsi, Nahla Deghbar, Nora Bouzid, Hamida Mesbah-Amroun, Chafia Touil-Boukoffa
We aimed to investigate preventive effects of All-trans retinoic acid (ATRA) on a lipopolysaccharide (LPS)-induced aged neuroinflammation model. We analyzed behavior, systemic nitric oxide (NO) production, cerebral NO synthase (NOS2) and β-amyloid (Aβ) 1-42 expression and tissue integrity in the neuroinflammation model pretreated with ATRA (150μg/ml/rat/day) for 30days. Our results showed that LPS treatment (500μg/kg/day) for 7days disturbed memory, enhanced systemic NO production, NOS2 and Aβ 1-42 cerebral expression and generated an Alzheimer's disease (AD)-like neuronal degeneration...
November 15, 2016: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/27755003/modeling-alzheimer-s-disease-through-functional-independence-and-participation
#5
Chiara Zucchella, Michelangelo Bartolo, Sara Bernini, Marta Picascia, Paola Malinverni, Elena Sinforiani
INTRODUCTION: The relationship between cognitive and functional impairment in Alzheimer's Disease (AD) at the earliest stages of the disease is not well characterized. This study aimed at investigating such relationships along AD evolution by means of the Disability Assessment for Dementia (DAD). METHODS: Consecutive pairs of AD outpatients and their primary informal caregivers were enrolled. Patients were evaluated by means of the Mini Mental State Examination and neuropsychological tests...
October 17, 2016: Alzheimer Disease and Associated Disorders
https://www.readbyqxmd.com/read/27732893/two-cholinesterase-inhibitors-trigger-dissimilar-effects-on-behavior-and-body-weight-in-c57bl-6-mice-the-case-of-chlorpyrifos-and-rivastigmine
#6
Pia Basaure, Fiona Peris-Sampedro, Maria Cabré, Ingrid Reverte, Maria Teresa Colomina
Cholinesterases (ChE) are common targets of organophosphate (OP) pesticides and play a critical role in the pathology of some dementias. While chlorpyrifos (CPF) remains one of the most commonly used OPs in the world, numerous investigations have reported its neurotoxic potential and highlighted behavioral disturbances upon its administration. Rivastigmine currently serves to treat Alzheimer's disease, but it may induce cholinergic overstimulation in non-demented individuals. The present investigation aimed to compare the acute and delayed effects caused by both ChE inhibitors in adult C57BL/6 male mice...
October 11, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/27632159/neuropsychiatric-symptom-clusters-in-stroke-and-transient-ischemic-attack-by-cognitive-status-and-stroke-subtype-frequency-and-relationships-with-vascular-lesions-brain-atrophy-and-amyloid
#7
Adrian Wong, Alexander Y L Lau, Jie Yang, Zhaolu Wang, Wenyan Liu, Bonnie Y K Lam, Lisa Au, Lin Shi, Defeng Wang, Winnie C W Chu, Yun-Yun Xiong, Eugene S K Lo, Lorraine S N Law, Thomas W H Leung, Linda C W Lam, Anne Y Y Chan, Yannie O Y Soo, Eric Y L Leung, Lawrence K S Wong, Vincent C T Mok
BACKGROUND: The objectives of this study are 1) to examine the frequencies of neuropsychiatric symptom clusters in patients with stroke or transient ischemic attack (TIA) by cognitive level and stroke subtype; and 2) to evaluate effect of demographic, clinical, and neuroimaging measures of chronic brain changes and amyloid upon neuropsychiatric symptom clusters. METHODS: Hospital-based, cross-sectional study. 518 patients were administered the Neuropsychiatric Inventory (NPI) 3-6 months post index admission...
2016: PloS One
https://www.readbyqxmd.com/read/27598965/anxiety-and-depression-with-neurogenesis-defects-in-exchange-protein-directly-activated-by-camp-2-deficient-mice-are-ameliorated-by-a-selective-serotonin-reuptake-inhibitor-prozac
#8
L Zhou, S L Ma, P K K Yeung, Y H Wong, K W K Tsim, K F So, L C W Lam, S K Chung
Intracellular cAMP and serotonin are important modulators of anxiety and depression. Fluoxetine, a selective serotonin reuptake inhibitor (SSRI) also known as Prozac, is widely used against depression, potentially by activating cAMP response element-binding protein (CREB) and increasing brain-derived neurotrophic factor (BDNF) through protein kinase A (PKA). However, the role of Epac1 and Epac2 (Rap guanine nucleotide exchange factors, RAPGEF3 and RAPGEF4, respectively) as potential downstream targets of SSRI/cAMP in mood regulations is not yet clear...
2016: Translational Psychiatry
https://www.readbyqxmd.com/read/27567844/paired-studies-comparing-clinical-profiles-of-lewy-body-dementia-with-alzheimer-s-and-parkinson-s-diseases
#9
Douglas W Scharre, Shu-Ing Chang, Haikady N Nagaraja, Ariane Park, Anahita Adeli, Punit Agrawal, Anne Kloos, Deb Kegelmeyer, Shannon Linder, Nora Fritz, Sandra K Kostyk, Maria Kataki
Limited data compares clinical profiles of Lewy Body Dementia (LBD) with Alzheimer's disease (AD) and Parkinson's disease (PD). Twenty-one mildly demented ambulatory LBD subjects were individually matched by MMSE score with 21 AD subjects and by UPDRS motor score with 21 PD subjects. Matched by age, gender, education, and race, pairs were compared using cognitive, functional, behavioral, and motor measures. LBD group performed worse than PD on axial motor, gait, and balance measures. AD had more amnesia and orientation impairments, but less executive and visuospatial deficits than LBD subjects...
October 4, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27566465/alzheimer-s-disease-and-gut-microbiota
#10
Xu Hu, Tao Wang, Feng Jin
Alzheimer's disease (AD) is a most common neurodegenerative disorder, which associates with impaired cognition. Gut microbiota can modulate host brain function and behavior via microbiota-gut-brain axis, including cognitive behavior. Germ-free animals, antibiotics, probiotics intervention and diet can induce alterations of gut microbiota and gut physiology and also host cognitive behavior, increasing or decreasing risks of AD. The increased permeability of intestine and blood-brain barrier induced by gut microbiota disturbance will increase the incidence of neurodegeneration disorders...
October 2016: Science China. Life Sciences
https://www.readbyqxmd.com/read/27536962/differences-of-behavioral-and-psychological-symptoms-of-dementia-in-disease-severity-in-four-major-dementias
#11
Hiroaki Kazui, Kenji Yoshiyama, Hideki Kanemoto, Yukiko Suzuki, Shunsuke Sato, Mamoru Hashimoto, Manabu Ikeda, Hibiki Tanaka, Yutaka Hatada, Masateru Matsushita, Yoshiyuki Nishio, Etsuro Mori, Satoshi Tanimukai, Kenjiro Komori, Taku Yoshida, Hideaki Shimizu, Teruhisa Matsumoto, Takaaki Mori, Tetsuo Kashibayashi, Kazumasa Yokoyama, Tatsuo Shimomura, Yasunobu Kabeshita, Hiroyoshi Adachi, Toshihisa Tanaka
BACKGROUND/AIMS: Behavioral and psychological symptoms of dementia (BPSDs) negatively impact the prognosis of dementia patients and increase caregiver distress. The aims of this study were to clarify the differences of trajectories of 12 kinds of BPSDs by disease severity in four major dementias and to develop charts showing the frequency, severity, and associated caregiver distress (ACD) of BPSDs using the data of a Japan multicenter study (J-BIRD). METHODS: We gathered Neuropsychiatric Inventory (NPI) data of patients with Alzheimer's disease (AD; n = 1091), dementia with Lewy bodies (DLB; n = 249), vascular dementia (VaD; n = 156), and frontotemporal lobar degeneration (FTLD; n = 102) collected during a 5-year period up to July 31, 2013 in seven centers for dementia in Japan...
2016: PloS One
https://www.readbyqxmd.com/read/27512019/white-matter-and-cognition-making-the-connection
#12
REVIEW
Christopher M Filley, R Douglas Fields
Whereas the cerebral cortex has long been regarded by neuroscientists as the major locus of cognitive function, the white matter of the brain is increasingly recognized as equally critical for cognition. White matter comprises half of the brain, has expanded more than gray matter in evolution, and forms an indispensable component of distributed neural networks that subserve neurobehavioral operations. White matter tracts mediate the essential connectivity by which human behavior is organized, working in concert with gray matter to enable the extraordinary repertoire of human cognitive capacities...
November 1, 2016: Journal of Neurophysiology
https://www.readbyqxmd.com/read/27486898/apolipoprotein-e-genotype-linked-to-spatial-gait-characteristics-predictors-of-cognitive-dual-task-gait-change
#13
Rebecca K MacAulay, Ted Allaire, Robert Brouillette, Heather Foil, Annadora J Bruce-Keller, Jeffrey N Keller
BACKGROUND: Developing measures to detect preclinical Alzheimer's Disease is vital, as prodromal stage interventions may prove more efficacious in altering the disease's trajectory. Gait changes may serve as a useful clinical heuristic that precedes cognitive decline. This study provides the first systematic investigation of gait characteristics relationship with relevant demographic, physical, genetic (Apolipoprotein E genotype), and health risk factors in non-demented older adults during a cognitive-load dual task walking condition...
2016: PloS One
https://www.readbyqxmd.com/read/27474225/enriched-endogenous-n-3-polyunsaturated-fatty-acids-alleviate-cognitive-and-behavioral-deficits-in-a-mice-model-of-alzheimer-s-disease
#14
Kefeng Wu, Xiang Gao, Baoyan Shi, Shiyu Chen, Xin Zhou, Zhidong Li, Yuhong Gan, Liao Cui, Jing Xuan Kang, Wende Li, Ren Huang
Alzheimer's disease (AD) is a progressive neurodegenerative disorder that accompanied by memory deficits and neuropsychiatric dysfunction. Omega-3 polyunsaturated fatty acids (n-3 PUFAs) have seemly therapeutic potential in AD, but the benefit of n-3 PUFAs is still in debates. Here, we employed a transgenic mice carry fat-1 gene to encode n-3 desaturase from Caenorhabditis elegans, which increase endogenous n-3 PUFAs by converting n-6 PUFAs to n-3 PUFAs crossed with amyloid precursor protein (APP) Tg mice to evaluate the protective effects of endogenous n-3 PUFAs on cognitive and behavioral deficits of APP Tg mice...
October 1, 2016: Neuroscience
https://www.readbyqxmd.com/read/27468911/psychological-interventions-for-neuropsychiatric-disturbances-in-mild-and-moderate-alzheimer-s-disease-current-evidences-and-future-directions
#15
REVIEW
Marcia Cristina Nascimento Dourado, Jerson Laks
The occurrence of the neuropsychiatric disturbances is common feature in dementia. Nonpharmacological interventions are the first approach to manage these symptoms. We reviewed the available literature data on psychological interventions for neuropsychiatric disturbances in Alzheimer's disease (AD) focusing on the significant impact on people with dementia and their caregivers. Reminiscence interventions showed evidences of an improvement in cognition and mood in people with dementia as well as a decrease in caregiver burden...
2016: Current Alzheimer Research
https://www.readbyqxmd.com/read/27463686/peculiarities-of-neurological-disorders-and-study-designs
#16
Ettore Beghi, Elisabetta Pupillo, Giorgia Giussani
BACKGROUND: Neurological disorders are heterogeneous clinical conditions with variable course and outcome. SUMMARY: The basic aspects of the commonest neurological disorders are addressed along with the proposed structure of randomized clinical trials (RCTs). Dementing disorders, including Alzheimer's disease (AD), are clinical conditions in which altered cognitive functions are associated with behavioral and personality changes. Parkinson's disease (PD) is a multisystem disorder characterized by motor dysfunction associated with dysautonomia, sleep and olfactory disturbances, cognitive changes, and depression...
2016: Frontiers of Neurology and Neuroscience
https://www.readbyqxmd.com/read/27438830/behavioral-abnormality-induced-by-enhanced-hypothalamo-pituitary-adrenocortical-axis-activity-under-dietary-zinc-deficiency-and-its-usefulness-as-a-model
#17
REVIEW
Atsushi Takeda, Haruna Tamano, Ryusuke Nishio, Taku Murakami
Dietary zinc deficiency increases glucocorticoid secretion from the adrenal cortex via enhanced hypothalamo-pituitary-adrenocortical (HPA) axis activity and induces neuropsychological symptoms, i.e., behavioral abnormality. Behavioral abnormality is due to the increase in glucocorticoid secretion rather than disturbance of brain zinc homeostasis, which occurs after the increase in glucocorticoid secretion. A major target of glucocorticoids is the hippocampus and their actions are often associated with disturbance of glutamatergic neurotransmission, which may be linked to behavioral abnormality, such as depressive symptoms and aggressive behavior under zinc deficiency...
2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27435080/the-involvement-of-homocysteine-in-stress-induced-a%C3%AE-precursor-protein-misprocessing-and-related-cognitive-decline-in-rats
#18
Fang Xie, Yun Zhao, Jing Ma, Jing-Bo Gong, Shi-Da Wang, Liang Zhang, Xiu-Jie Gao, Ling-Jia Qian
Chronic stress is a risk factor in the development of cognitive decline and even Alzheimer's disease (AD), although its underlying mechanism is not fully understood. Our previous data demonstrated that the level of homocysteine (Hcy) was significantly elevated in the plasma of stressed animals, which suggests the possibility that Hcy is a link between stress and cognitive decline. To test this hypothesis, we compared the cognitive function, plasma concentrations of Hcy, and the brain beta-amyloid (Aβ) level between rats with or without chronic unexpected mild stress (CUMS)...
September 2016: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/27433404/a-comparison-of-the-behavioral-and-psychological-symptoms-of-dementia-bpsd-in-early-onset-and-late-onset-alzheimer-s-disease-a-study-from-south-east-asia-kashmir-india
#19
Raheel Mushtaq, Charles Pinto, Shah Faisal Ahmad Tarfarosh, Arshad Hussain, Sheikh Shoib, Tabindah Shah, Sahil Shah, Mushbiq Manzoor, Mudassir Bhat, Tasleem Arif
BACKGROUND: A gradual increase in the longevity due to advancement of treatment modalities and a subsequent surge in elderly population in India have led to a growing curiosity in the geriatric age group with Alzheimer's disease (AD). Behavioral and psychological symptoms of dementia (BPSD) represent epiphenomena of AD. However, no comprehensive study has been carried out in South East Asia (Kashmir, India), to assess the behavioral and psychological symptoms in subtypes of AD. OBJECTIVES: The purpose of this study was to assess BPSD in early-onset Alzheimer's disease (EOAD) and late-onset Alzheimer's disease (LOAD)...
2016: Curēus
https://www.readbyqxmd.com/read/27347894/sex-hormones-and-cognition-neuroendocrine-influences-on-memory-and-learning
#20
Dwayne K Hamson, Meighen M Roes, Liisa A M Galea
Sex differences in neurological disease exist in incidence, severity, progression, and symptoms and may ultimately influence treatment. Cognitive disturbances are frequent in neuropsychiatric disease with men showing greater cognitive impairment in schizophrenia, but women showing more severe dementia and cognitive decline with Alzheimer's disease. Although there are no overall differences in intelligence between the sexes, men, and women demonstrate slight but consistent differences in a number of cognitive domains...
June 13, 2016: Comprehensive Physiology
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