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Alzheimer's behavioral manifestations

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https://www.readbyqxmd.com/read/29755345/analogous-%C3%AE-carboline-alkaloids-harmaline-and-harmine-ameliorate-scopolamine-induced-cognition-dysfunction-by-attenuating-acetylcholinesterase-activity-oxidative-stress-and-inflammation-in-mice
#1
Shu-Ping Li, Yu-Wen Wang, Sheng-Lan Qi, Yun-Peng Zhang, Gang Deng, Wen-Zheng Ding, Chao Ma, Qi-Yan Lin, Hui-Da Guan, Wei Liu, Xue-Mei Cheng, Chang-Hong Wang
The analogous β-carboline alkaloids, harmaline (HAL) and harmine (HAR), possess a variety of biological properties, including acetylcholinesterase (AChE) inhibitory activity, antioxidant, anti-inflammatory, and many others, and have great potential for treating Alzheimer's disease (AD). However, studies have showed that the two compounds have similar structures and in vitro AChE inhibitory activities but with significant difference in bioavailability. The objective of this study was to comparatively investigate the effects of HAL and HAR in memory deficits of scopolamine-induced mice...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29746820/electrophysiological-repetition-effects-in-persons-with-mild-cognitive-impairment-depend-upon-working-memory-demand
#2
Lucas S Broster, Shonna L Jenkins, Sarah D Holmes, Matthew G Edwards, Gregory A Jicha, Yang Jiang
Forms of implicit memory, including repetition effects, are preserved relative to explicit memory in clinical Alzheimer's disease. Consequently, cognitive interventions for persons with Alzheimer's disease have been developed that leverage this fact. However, despite the clinical robustness of behavioral repetition effects, altered neural mechanisms of repetition effects are studied as biomarkers of both clinical Alzheimer's disease and pre-morbid Alzheimer's changes in the brain. We hypothesized that the clinical preservation of behavioral repetition effects results in part from concurrent operation of discrete memory systems...
May 7, 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29705851/mouse-testing-methods-in-psychoneuroimmunology-2-0-measuring-behavioral-responses
#3
Albert E Towers, Jason M York, Tracy Baynard, Stephen J Gainey, Gregory G Freund
The field of psychoneuroimmunology (PNI) aims to uncover the processes and consequences of nervous, immune, and endocrine system relationships. Behavior is a consequence of such interactions and manifests from a complex interweave of factors including immune-to-neural and neural-to-immune communication. Often the signaling molecules involved during a particular episode of neuroimmune activation are not known but behavioral response provides evidence that bioactives such as neurotransmitters and cytokines are perturbed...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29704671/apathy-in-alzheimer-s-disease-and-frontotemporal-dementia-distinct-clinical-profiles-and-neural-correlates
#4
Fiona Kumfor, Alice Zhen, John R Hodges, Olivier Piguet, Muireann Irish
OBJECTIVE: Apathy is the most prevalent and disabling non-cognitive symptom of dementia and affects 90% of patients across the disease course. Despite its pervasiveness, how apathy manifests across dementia syndromes and the neurobiological mechanisms driving these symptoms are poorly understood. Here, we applied the multidimensional ABC model of apathy, which recognizes Affective, Behavioural and Cognitive apathy, in Alzheimer's disease (AD) and behavioural-variant frontotemporal dementia (bvFTD)...
March 29, 2018: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29628029/-mild-behavioral-impairment-a-new-concept-for-the-prodromic-phases-of-dementia
#5
Luis Agüera Ortiz, Jorge López Álvarez
Neuropsychiatric symptoms (NPS) are frequent in dementia. These symptoms are also present in patients with mild cognitive impairment (MCI) and can even constitute the first manifestations of a neurodegenerative process, preceding the development of cognitive symptoms. The presence of NPS is associated with higher rates of conversion to dementia in healthy persons and patients with MCI. Recognizing the importance of NPS, the Alzheimer Association created a working group that has designed the ISTAART criteria for mild behavioral impairment (MBI), including the following areas of assessment: motivation, affect, impulse control, social appropriateness and thoughts/perception...
June 2017: Revista Española de Geriatría y Gerontología
https://www.readbyqxmd.com/read/29626648/abnormal-circadian-locomotor-rhythms-and-per-gene-expression-in-six-month-old-triple-transgenic-mice-model-of-alzheimer-s-disease
#6
Meina Wu, Fang Zhou, Xiuli Cao, Junting Yang, Yu Bai, Xudong Yan, Jimin Cao, Jinshun Qi
Circadian rhythm disturbance (CRD) is one of the iconic manifestations in Alzheimer's disease (AD), a disease tightly associated with age, but the characteristics and gender difference of CRD occurred in AD have not been well demonstrated. Using 6-month-old triple transgenic AD mouse model (3xTg-AD) without obvious brain pathological changes, we demonstrated the gender difference of CRD at this age. We further showed abnormal Per gene expression in the central clock suprachiasmatic nucleus (SCN) of the 3xTg-AD mice...
April 4, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29618200/intranasally-administered-s100a9-amyloids-induced-cellular-stress-amyloid-seeding-and-behavioral-impairment-in-aged-mice
#7
Igor A Iashchishyn, Marina A Gruden, Roman A Moskalenko, Tatiana V Davydova, Chao Wang, Robert D E Sewell, Ludmilla A Morozova-Roche
Amyloid formation and neuroinflammation are major features of Alzheimer's disease pathology. Proinflammatory mediator S100A9 was shown to act as a link between the amyloid and neuroinflammatory cascades in Alzheimer's disease, leading together with Aβ to plaque formation, neuronal loss and memory impairment. In order to examine if S100A9 alone in its native and amyloid states can induce neuronal stress and memory impairment, we have administered S100A9 species intranasally to aged mice. Single and sequential immunohistochemistry and passive avoidance behavioral test were conducted to evaluate the consequences...
April 12, 2018: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29541056/lipidomics-analysis-of-behavioral-variant-frontotemporal-dementia-a-scope-for-biomarker-development
#8
Woojin Scott Kim, Eve Jary, Russell Pickford, Ying He, Rebekah M Ahmed, Olivier Piguet, John R Hodges, Glenda M Halliday
Behavioral variant frontotemporal dementia (bvFTD) is the most prevalent form of FTD syndromes. bvFTD is characterized clinically by changes in behavior and cognition and pathologically by focal brain atrophy and concomitant loss of lipids. bvFTD is further characterized by eating abnormalities that result in dyslipidemia. Although dyslipidemia is apparent in bvFTD, very little is known about global lipid changes in bvFTD and lipid dysregulation underlying bvFTD. Here, we undertook a comprehensive lipidomics analysis of blood plasma from patients with bvFTD, patients with Alzheimer's disease (AD) and controls, using liquid chromatography-tandem mass spectrometry, with the aim of understanding lipid dysregulation in bvFTD...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29460910/-alzheimer-s-disease
#9
O A Kicherova, L I Reikhert
Alzheimer's disease (AD) is a serious medical and social problem of our time, while remaining the most common cause of dementia in the elderly. The leading symptom in the clinical picture of the disease is a progressive loss of memory with further development of behavioral disorders. In the early stages of AD, patients are mostly managed by neurologists and differential diagnosis is carried out with a variety of neurodegenerative diseases. The authors present clinical criteria of AD diagnosis and consider diagnostic possibilities in the predementia stage using biological markers...
2018: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/29429523/allicin-ameliorates-cognitive-impairment-in-app-ps1-mice-via-suppressing-oxidative-stress-by-blocking-jnk-signaling-pathways
#10
Hao Zhang, Ping Wang, Yixue Xue, Libo Liu, Zhen Li, Yunhui Liu
In middle and old age, Alzheimer's disease (AD) is a progressive neurodegenerative disorder of brain. As an increasingly aging population, AD represents a huge burden for the patients' family and the country. However, current therapeutical strategies have shown limited effectiveness. Allicin, which is the main composition of garlic, was reported to prevent the learning and memory impairment of AD mouse model. As the mechanism is not clear, in this study, we used the APP (amyloid precursor protein)/PS1 (presenilin 1) double transgenic mice, which express human mutant APP and PS1, to determine the protective effect of allicin on neurons...
February 2018: Tissue & Cell
https://www.readbyqxmd.com/read/29393172/saccular-impairment-in-alzheimer-s-disease-is-associated-with-driving-difficulty
#11
Eric X Wei, Esther S Oh, Aisha Harun, Matthew Ehrenburg, Yuri Agrawal
BACKGROUND/AIMS: Patients with Alzheimer's disease (AD) experience increased rates of vestibular loss. Recent studies suggest that saccular impairment in mild cognitive impairment (MCI) and AD patients is associated with impaired spatial cognitive function. However, the impact of saccular impairment on everyday behaviors that rely on spatial cognitive function is unknown. METHODS: We recruited 60 patients (21 MCI and 39 AD) from an interdisciplinary Memory Clinic...
2017: Dementia and Geriatric Cognitive Disorders
https://www.readbyqxmd.com/read/29361065/from-research-to-application-supportive-and-therapeutic-environments-for-people-living-with-dementia
#12
Margaret P Calkins
The evidence about the role the designed and built environment plays in supporting individuals living with dementia has been steadily mounting for almost 40 years. Beginning with the work of M. Powell Lawton at the Weiss Pavilion at the Philadelphia Geriatric Center, there are now dozens of researchers who are exploring how the environment can be either supportive and therapeutic, indeed even serving as a prosthetic for various changes in cognition, or be a barrier to independent functioning and high quality of life...
January 18, 2018: Gerontologist
https://www.readbyqxmd.com/read/29356981/ocimum-basilicum-improve-chronic-stress-induced-neurodegenerative-changes-in-mice-hippocampus
#13
Nasra Naeim Ayuob, Manal Galal Abd El Wahab, Soad Shaker Ali, Hanem Saad Abdel-Tawab
Alzheimer's disease (AD), one of the progressive neurodegenerative diseases might be associated with exposure to stress and altered living conditions. This study aimed to evaluate the effectiveness of Ocimum basilicum (OB) essential oils in improving the neurodegenerative-like changes induced in mice after exposed to chronic unpredictable mild stress (CUMS). Forty male Swiss albino mice divided into four groups (n = 10); the control, CUMS, CUMS + Fluoxetine, CUMS + OB were used. Behavioral tests, serum corticosterone level, hippocampus protein level of the glucocorticoid receptors (GRs) and brain-dreived neurotropic factor (BDNF) were determined after exposure to CUMS...
January 22, 2018: Metabolic Brain Disease
https://www.readbyqxmd.com/read/29341070/personality-changes-during-the-transition-from-cognitive-health-to-mild-cognitive-impairment
#14
Richard J Caselli, Blake T Langlais, Amylou C Dueck, Bruce R Henslin, Travis A Johnson, Bryan K Woodruff, Charlene Hoffman-Snyder, Dona E C Locke
BACKGROUND/OBJECTIVES: Behavioral problems in individuals with Alzheimer's disease (AD) impose major management challenges. Current prevention strategies are anchored to cognitive outcomes, but behavioral outcomes may provide another, clinically relevant opportunity for preemptive therapy. We sought to determine whether personality changes that predispose to behavioral disorders arise during the transition from preclinical AD to mild cognitive impairment (MCI). DESIGN: Longitudinal observational cohort study...
January 17, 2018: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29304218/selective-vulnerability-of-brainstem-nuclei-in-distinct-tauopathies-a-postmortem-study
#15
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...
February 1, 2018: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/29286496/evoked-bioelectrical-brain-activity-following-exposure-to-ionizing-radiation
#16
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
#17
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...
April 2018: Assessment
https://www.readbyqxmd.com/read/29235615/-music-therapy-as-a-non-pharmacological-treatment-in-alzheimer-s-disease-a-systematic-review
#18
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
#19
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
#20
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
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