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Alzheimer's behavioral manifestations

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https://www.readbyqxmd.com/read/29304218/selective-vulnerability-of-brainstem-nuclei-in-distinct-tauopathies-a-postmortem-study
#1
Rana A Eser, Alexander J Ehrenberg, Cathrine Petersen, Sara Dunlop, Maria B Mejia, Claudia K Suemoto, Christine M Walsh, Hima Rajana, Jun Oh, Panos Theofilas, William W Seeley, Bruce L Miller, Thomas C Neylan, Helmut Heinsen, Lea T Grinberg
The brainstem nuclei of the reticular formation (RF) are critical for regulating homeostasis, behavior, and cognition. RF degenerates in tauopathies including Alzheimer disease (AD), progressive supranuclear palsy (PSP), and corticobasal degeneration (CBD). Although the burden of phopho-tau inclusion is high across these diseases, suggesting a similar vulnerability pattern, a distinct RF-associated clinical phenotype in these diseases indicates the opposite. To compare patterns of RF selective vulnerability to tauopathies, we analyzed 5 RF nuclei in tissue from 14 AD, 14 CBD, 10 PSP, and 3 control cases...
January 2, 2018: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/29286496/evoked-bioelectrical-brain-activity-following-exposure-to-ionizing-radiation
#2
K Loganovsky, K Kuts
The article provides an overview of modern physiological evidence to support the hypothesis on cortico limbic sys tem dysfunction due to the hippocampal neurogenesis impairment as a basis of the brain interhemispheric asym metry and neurocognitive deficit after radiation exposure. The importance of the research of both evoked poten tials and fields as a highly sensitive and informative method is emphasized.Particular attention is paid to cerebral sensor systems dysfunction as a typical effect of ionizing radiation...
December 2017: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
https://www.readbyqxmd.com/read/29284275/alzheimer-s-disease-assessment-a-review-and-illustrations-focusing-on-item-response-theory-techniques
#3
Steve Balsis, Tabina K Choudhury, Lisa Geraci, Jared F Benge, Christopher J Patrick
Alzheimer's disease (AD) affects neurological, cognitive, and behavioral processes. Thus, to accurately assess this disease, researchers and clinicians need to combine and incorporate data across these domains. This presents not only distinct methodological and statistical challenges but also unique opportunities for the development and advancement of psychometric techniques. In this article, we describe relatively recent research using item response theory (IRT) that has been used to make progress in assessing the disease across its various symptomatic and pathological manifestations...
December 1, 2017: Assessment
https://www.readbyqxmd.com/read/29235615/-music-therapy-as-a-non-pharmacological-treatment-in-alzheimer-s-disease-a-systematic-review
#4
N Garcia-Casares, R M Moreno-Leiva, J A Garcia-Arnes
INTRODUCTION: Alzheimer's disease (AD) is a neurodegenerative disease which involves, among other manifestations, a progressive deterioration of memory and language, as well as behavioral disorders. In addition to non-curative pharmacological therapies, for the last years, music therapy has been developed as an effective non-pharmacological therapy in order to relieve many of these manifestations. AIM: To analyze the recent scientific evidence about the effect of music therapy on cognitive and behavioral symptoms in patients with AD...
December 16, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/29143702/association-between-altered-neurochemical-metabolites-and-apathy-in-patients-with-alzheimer-s-disease
#5
Yi-Chun Yeh, Chun-Wei Li, Yu-Ting Kuo, Mei-Feng Huang, Tai-Ling Liu, Twei-Shiun Jaw, Yi-Hsin Yang, Kuang-Che Kuo, Cheng-Sheng Chen
BACKGROUND: Apathy is a condition characterized by a lack of motivation that manifests in emotional, behavioral, and cognitive domains. Although previous studies have indicated that apathy is associated with frontal lesions, few studies have focused on the different subdomains of apathy, and no in vivo human biochemical data have been obtained to examine the neurochemical changes related to apathy in patients with Alzheimer's disease (AD). Thus, we investigated the frontal neurochemical alterations related to apathy among patients with AD using proton magnetic resonance spectroscopy (1H MRS)...
November 16, 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/29128902/overexpression-of-5-lipoxygenase-worsens-the-phenotype-of-a-mouse-model-of-tauopathy
#6
Phillip F Giannopoulos, Domenico Praticò
Brain accumulation of increasing amount of phosphorylated microtubule associated tau protein is one the major hallmark lesions of Alzheimer's disease (AD) and related tauopathies. Consistent evidence from clinical and animal studies has shown that neuroinflammation characterizes these diseases. The 5-lipoxygenase (5LO) is an enzyme protein whose metabolic products are lipids with potent inflammatory actions. Previously, we showed that blockade of 5LO activation ameliorates the phenotype of the htau transgenic mice...
November 11, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/29125684/magnesium-boosts-the-memory-restorative-effect-of-environmental-enrichment-in-alzheimer-s-disease-mice
#7
Ying Huang, Xian Huang, Ling Zhang, Fang Han, Ke-Liang Pang, Xue Li, Jian-Ying Shen
BACKGROUND: Environmental enrichment (EE) has been shown to enhance cognitive function in mouse models of Alzheimer's disease (AD). Magnesium-L-threonate (MgT) is a compound with a newly discovered effect to rescue learning and memory function in aging and AD mice. AIM: To study the additive therapeutic effect of EE combined with MgT (EM) and the potential mechanism underlying the effects. MATERIALS AND METHODS: APP/PS1 mice were treated with EE, MgT, or combination of EE and MgT (EM) and compared for restored memory function...
January 2018: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/29017626/case-series-of-mild-behavioral-impairment-toward-an-understanding-of-the-early-stages-of-neurodegenerative-diseases-affecting-behavior-and-cognition
#8
Alicja Cieslak, Eric E Smith, John Lysack, Zahinoor Ismail
Mild behavioral impairment (MBI) is characterized by later life acquired, sustained, and impactful neuropsychiatric symptoms (NPS) of any severity that cannot be better accounted for by other formal medical and psychiatric nosology. MBI is an "at risk" state for incident cognitive decline and dementia, and for some, MBI is the index manifestation of neurodegeneration, observed in advance of cognitive impairment. Initially described in Frontotemporal Dementia (FTD), MBI evolved to describe a preclinical stage of all cause dementia, and has been operationalized in the International Society to Advance Alzheimer's Research and Treatment-Alzheimer's Association (ISTAART-AA) proposed research diagnostic criteria...
October 11, 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/28899446/affective-and-emotional-dysregulation-as-pre-dementia-risk-markers-exploring-the-mild-behavioral-impairment-symptoms-of-depression-anxiety-irritability-and-euphoria
#9
Zahinoor Ismail, Jennifer Gatchel, Daniel R Bateman, Ricardo Barcelos-Ferreira, Marc Chantillon, Judith Jaeger, Nancy J Donovan, Moyra E Mortby
BACKGROUND: Affective and emotional symptoms such as depression, anxiety, euphoria, and irritability are common neuropsychiatric symptoms (NPS) in pre-dementia and cognitively normal older adults. They comprise a domain of Mild Behavioral Impairment (MBI), which describes their emergence in later life as an at-risk state for cognitive decline and dementia, and as a potential manifestation of prodromal dementia. This selective scoping review explores the epidemiology and neurobiological links between affective and emotional symptoms, and incident cognitive decline, focusing on recent literature in this expanding field of research...
September 13, 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/28857270/physical-aggression-among-patients-with-dementia-neuropathologically-confirmed-post-mortem
#10
Madeleine Liljegren, Maria Landqvist Waldö, Elisabet Englund
OBJECTIVE: To investigate the prevalence of physical aggression among patients with dementia of different types and to analyze potential differences in clinical traits, in terms of singular or repetitive behavior and occurrence in early or late stage of the disease. We also aimed at examining against whom the physical aggression was exerted. METHODS: We included 281 cases with a neuropathological dementia diagnosis from the brain bank at the Department of Pathology, Lund University, for this retrospective medical records review...
August 31, 2017: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28844871/emerging-role-of-amyloid-beta-in-stress-response-implication-for-depression-and-diabetes
#11
Maria Grazia Morgese, Stefania Schiavone, Luigia Trabace
Chronic stress is considered a widely accepted risk factor for the development of neuropsychiatric and neurological disorders. Indeed, high cortisol levels, and, thus, hypothalamic pituitary adrenal (HPA)-axis dysregulation, have been indicated as the most frequent alteration in patients affected by depression, as well as by Alzheimer's disease (AD). Furthermore, depressive state has been pointed as an early manifestation of AD, advocating an overlap between these neuropathological events. We have previously demonstrated that central soluble beta amyloid 1-42 (Aβ) administration peptide induces a depressive like-behavior in rats, with altered HPA axis activation, reduced cortical serotonin and neurotrophin levels...
August 24, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28734089/dementia-risk-and-prevention-by-targeting-modifiable-vascular-risk-factors
#12
REVIEW
Sana Tariq, Philip A Barber
The incidence of dementia is expected to double in the next 20 years and will contribute to heavy social and economic burden. Dementia is caused by neuronal loss that leads to brain atrophy years before symptoms manifest. Currently, no cure exists and extensive efforts are being made to mitigate cognitive impairment in late life in order to reduce the burden on patients, caregivers, and society. The most common type of dementia, Alzheimer's disease (AD), and vascular dementia (VaD) often co-exists in the brain and shares common, modifiable risk factors, which are targeted in numerous secondary prevention trials...
July 22, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28700830/spectral-and-photophysical-behavior-of-cytisine-in-n-hexane-experimental-evidence-for-the-s1-n-%C3%AF-%C3%A2-s0-fluorescence
#13
Ewa Krystkowiak, Anna K Przybył, Małgorzata Bayda, Julia Józkowiak, Andrzej Maciejewski
Spectral and photophysical properties of (-)-cytisine (the compound used as a smoking cessation aid and a potential drug in Alzheimer's and Parkinson's diseases) were investigated. The two conformers of cytisine, whose presence in the S0 state has been earlier proved by the NMR and IR methods as well as in theoretical calculation, in nonpolar n-hexane show a rarely observed prompt fluorescence from the S1(n,π*) excited state. This observation is unambiguously evidenced by very small radiative rate constants of these two emitting conformers, kF = 7...
July 25, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28697564/an-intracellular-amyloid-%C3%AE-a%C3%AE-pp-epitope-correlates-with-neurodegeneration-in-those-neuronal-populations-early-involved-in-alzheimer-s-disease
#14
Gisela Esquerda-Canals, Joaquim Martí-Clúa, Alejandro R Roda, Sandra Villegas
The main histopathological hallmarks of Alzheimer's disease (AD) are the extracellular deposition of neuritic amyloid plaques, composed of amyloid-β (Aβ) peptide, and the intracellular accumulation of neurofibrillary tangles, composed of hyperphosphorylated tau. Both traits are emulated in the 3xTg-AD mouse model. Because the relevance of this model in the bibliography and the main role of Aβ in neuronal impairment, here we have detailed the brain Aβ/AβPP distribution to subsequently quantify cellular density and intracellular burden for specific neuronal populations in the early stages of the disease...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28689508/social-inappropriateness-in-neurodegenerative-disorders
#15
Philippe Desmarais, Krista L Lanctôt, Mario Masellis, Sandra E Black, Nathan Herrmann
BACKGROUND: New onset of mood and behavioral changes in middle-aged patients are frequently the first manifestations of an unrecognized neurocognitive disorder. Impairment of social cognition, the cognitive ability to process social information coming from others, such as emotions, to attribute mental states to others, and to respond appropriately to them, is often at the origin of behavioral manifestations in neurodegenerative disorders. METHODS: This paper reviews the current literature on social cognition impairment in neurocognitive disorders, particularly in prodromal stages of behavioral-variant frontotemporal dementia (bvFTD), Alzheimer's disease (AD), idiopathic Parkinson's disease (IPD), and Lewy body dementia (LBD)...
July 10, 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/28560728/decreasing-hazards-of-alzheimer-s-disease-with-the-use-of-antidepressants-mitigating-the-risk-of-depression-and-apolipoprotein-e
#16
Shanna L Burke, Peter Maramaldi, Tamara Cadet, Walter Kukull
OBJECTIVE: Alzheimer's disease (AD) is a neurodegenerative disease, manifesting in clinically observable deficits in memory, thinking, and behavior that disproportionately affects older adults. Susceptibility genes, such as apolipoprotein ε4, have long been associated with an increased risk of AD diagnosis. Studies have shown associations between depression and increased risk of AD development. Furthermore, findings from previous investigations suggest mixed effects in the use of psychotropic medication in older adults...
May 31, 2017: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28530341/-measuring-the-effect-of-multi-sensory-stimulation-in-the-snoezelen-room-on-sleep-quality-of-alzheimer-patients-using-actigraph
#17
Doron Todder, Meital Levartovsky, Tzvi Dwolatzky
BACKGROUND: The most common cause of dementia is Alzheimer's disease. The major manifestation of the disease is the cognitive impairment which appears at the onset of the disease. In addition to the cognitive impairment there are behavioral dysfunctions such as apathy, anxiety, depression and sleep disturbances. The treatment for the manifestations of Alzheimer is currently pharmacological and behavioral. One of the newest behavioral treatments for Alzheimer is the multi-sensory treatment using the Snoezelen room...
December 2016: Harefuah
https://www.readbyqxmd.com/read/28499898/antidepressant-drugs-for-beta-amyloid-induced-depression-a-new-standpoint
#18
Stefania Schiavone, Paolo Tucci, Emanuela Mhillaj, Maria Bove, Luigia Trabace, Maria Grazia Morgese
Mounting evidence suggests that depression represents a risk factor and an early manifestation of Alzheimer's disease (AD). Neuropsychiatric symptoms may derive from neurobiological changes in specific brain areas and may be considered prodromal of dementia. We have previously reported the depressive-like profile in rats receiving a single intracerebroventricular injection of soluble amyloid beta protein (ßA). Here, we verified the effect of different classes of antidepressants on the ßA-induced depressive behavior and on cortical monoamine levels...
August 1, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28450241/regulatory-effects-of-galanin-system-on-development-of-several-age-related-chronic-diseases
#19
REVIEW
Penghua Fang, Mei Yu, Dang Wan, Lei Zhang, Long Han, Zhongqi Shen, Mingyi Shi, Yan Zhu, Zhenwen Zhang, Ping Bo
Age is a major risk factor for developing chronic diseases, including type 2 diabetes, depression and Alzheimer's disease. The rapidly increase in the morbidity of these age-related chronic diseases is becoming a global problem. Although our understanding of these age-related diseases has tremendously been improved in recent years, certain aspects of their etiology and relative regulatory factors still remain elusive to clinicians and researchers. Emerging evidences suggest that neuropeptide galanin is involved in the pathogenesis of type 2 diabetes, depression and Alzheimer's disease...
September 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28404803/neuropsychiatric-symptoms-predict-hypometabolism-in-preclinical-alzheimer-disease
#20
Kok Pin Ng, Tharick A Pascoal, Sulantha Mathotaarachchi, Chang-Oh Chung, Andréa L Benedet, Monica Shin, Min Su Kang, Xiaofeng Li, Maowen Ba, Nagaendran Kandiah, Pedro Rosa-Neto, Serge Gauthier
OBJECTIVE: To identify regional brain metabolic dysfunctions associated with neuropsychiatric symptoms (NPS) in preclinical Alzheimer disease (AD). METHODS: We stratified 115 cognitively normal individuals into preclinical AD (both amyloid and tau pathologies present), asymptomatic at risk for AD (either amyloid or tau pathology present), or healthy controls (no amyloid or tau pathology present) using [18F]florbetapir PET and CSF phosphorylated tau biomarkers. Regression and voxel-based regression models evaluated the relationships between baseline NPS measured by the Neuropsychiatric Inventory (NPI) and baseline and 2-year change in metabolism measured by [18F]fluorodeoxyglucose (FDG) PET...
May 9, 2017: Neurology
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