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Current Alzheimer Research

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https://www.readbyqxmd.com/read/28595523/blue-enriched-lighting-for-older-people-living-in-care-homes-effect-on-activity-actigraphic-sleep-mood-and-alertness
#1
Samantha Hopkins, Peter Lloyd Morgan, Luc J M Schlangen, Peter Williams, Debra J Skene, Benita Middleton
Environmental (little outdoor light; low indoor lighting) and age-related physiological factors (reduced light transmission through the ocular lens, reduced mobility) contribute to a light-deprived environment for older people living in care homes. This study investigates the effect of increasing indoor light levels with blue-enriched white lighting on objective (rest-activity rhythms, performance) and self-reported (mood, sleep, alertness) measures in older people. Eighty residents (69 female), aged 86 ± 8 yrs (mean ± SD), participated (MMSE 19 ± 6)...
June 7, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28595522/implementation-of-dynamic-lighting-in-a-nursing-home-impact-on-agitation-but-not-on-rest-activity-patterns
#2
Amely Wahnschaffe, Claudia Nowozin, Sven Haedel, Andreas Rath, Stefan Appelhof, Mirjam Münch, Dieter Kunz
Disturbances of circadian rest-activity rhythms in demented patients often culminate in the clinical problem of evening and nighttime agitation. The aim of the current study was to test the impact of a dynamic lighting system on agitation and rest-activity cycles. From midwinter on, a ceiling mounted dynamic lighting system was installed in the common room of a nursing home and programmed to produce high illuminance with higher blue light proportions during the day and lower illuminance without blue light in the evening...
June 7, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28558638/heart-rate-variability-indexes-in-dementia-a-systematic-review-with-a-quantitative-analysis
#3
Vanessa Pereira da Silva, Bruno Ribeiro Ramalho Oliveira, Roger Gomes Tavares Mello, Helena Moraes, Andrea Camaz Deslandes, Jerson Laks
BACKGROUND: Decreased HRV indexes indicate a low vagal activity and may be associated with development of dementia. The neurodegenerative process is associated with the cardiovascular autonomic control. OBJECTIVE: The aim of this systematic review was to investigate the effect size magnitude of the HRV indexes in the evaluation of autonomic dysfunction in elderly people with dementia. METHODS: PubMed (Medline), Web of Science, Scopus, Scielo, Lilacs, and APA Psycnet were consulted...
May 30, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28558637/the-cognitive-effects-of-wearable-cameras-in-mild-alzheimer-disease-an-experimental-study
#4
Ana Rita Silva, Maria Salomé Pinho, Luís Macedo, Christopher J A Moulin
BACKGROUND: Wearable cameras are a new type of intervention aimed at stimulating memory in Alzheimer's disease (AD). Such passive external memory aids have started to be considered as alternatives to both more active external aids (such as writing in diaries, journals, and timetables) and to internal cognitive strategies (such as spaced retrieval, errorless learning). OBJECTIVE: In order to understand the benefits of these innovative devices for memory compensation, the present experiment examined the effectiveness of two memory training strategies: SenseCam, a wearable camera, a passive external memory aid and a memory training programme (MEMO+) created from tasks known to stimulate memory, in comparison with a control condition, a personal written diary...
May 30, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28558636/%C3%AE-amyloid-upregulates-intracellular-clusterin-but-not-secretory-clusterin-in-primary-cultured-neurons-and-app-mice
#5
Ping Wang, Keliang Chen, Yuehua Gu, Qihao Guo, Zhen Hong, Qianhua Zhao
Backgound: Previous studies have suggested that the expression of Aβ and clusterin is positively correlated. However, the causal relationship between Aβ and clusterin has not been exactly clarified. METHODS: In this study, primary hippocampal neurons were treated with Aβ42; clusterin mRNA and protein expression was assessed. Furthermore, we evaluated Aβ and clusterin protein expression in the brains of APP/PSEN1 mice, as well as serum clusterin concentration. RESULTS: We observed here that the exposure of primary hippocampal neurons to Aβ42 induced an overexpression of intracellular clusterin, but the level of clusterin in supernatants was not changed...
May 30, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28545364/bright-light-delights-effects-of-daily-light-exposure-on-emotions-rest-activity-cycles-sleep-and-melatonin-secretion-in-severely-demented-patients
#6
Mirjam Münch, Michael Schmieder, Katharina Bieler, Rolf Goldbach, Timo Fuhrmann, Naomi Zumstein, Petra Vonmoos, Jean-Louis Scartezzini, Anna Wirz-Justice, Christian Cajochen
We tested whether the effects of a dynamic lighting system are superior to conventional lighting on emotions, agitation behaviour, quality of life, melatonin secretion and circadian rest-activity cycles in severely demented patients. As a comparison, an age matched control patient group was exposed to conventional lighting. For none of the output measures, significant differences between the two lighting conditions were found during the 8 study weeks in fall/winter. Thus, we divided the patient cohort (n = 89) into two groups, solely based on the median of their daily individual light exposure...
May 22, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28545363/sleep-wake-patterns-and-cognition-of-older-adults-with-amnestic-mild-cognitive-impairment-amci-a-comparison-with-cognitively-healthy-adults-and-moderate-alzheimer-s-disease-patients
#7
Emma J Wams, Gordon K Wilcock, Russell G Foster, Katharina Wulff
Age-related cognitive impairment and the prevalence of neurodegenerative disease contribute to decreasing quality of life in affected individuals and their families as well as demand considerable societal responsibility. Sleep supports overall brain activity and contributes to both physical and mental health. As a result sleep is an attractive target for exploring ways to promote health in accelerated cognitive aging. The aims of this study were to characterise cognitive performance and sleep-wake behaviour in older adults with different degrees of cognitive impairment...
May 22, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28545362/insight-into-the-role-of-photoreception-and-light-intervention-for-sleep-and-neuropsychiatric-behaviour-in-the-elderly
#8
Katharina Wulff, Russell G Foster
Light exerts influences on many physiological and behavioural functions in humans. These functions can be described as image-forming (IF) and non-image forming (NIF) visual processes, both originating in the retina of the eye. Image-forming refers to vision; the process of detecting and distinguishing shapes and colour of objects. Non-image forming refers to detecting level of light intensity or brightness of ambient space, which affects basal physiology such as cycles of rest and activity or the endocrine system...
May 22, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28545361/applying-melanopic-lux-to-measure-biological-light-effects-on-melatonin-suppression-and-subjective-sleepiness
#9
Claudia Nowozin, Amely Wahnschaffe, Andrea Rodenbeck, Jan de Zeeuw, Sven Hädel, Ruslan Kozakov, Heinz Schöpp, Mirjam Münch, Dieter Kunz
In the beginning of this century a novel photopigment, melanopsin, was discovered in a sub-class of retinal ganglion cells and its action spectrum was described. Shortly after, it became clear that melanopsin is one major contributor to non-visual eye-mediated effects of light on e.g. the circadian, neuroendocrine and neurobehavioral systems. First applied studies pointed out that these non-visual effects of light are relevant for wellbeing, performance and general health. A standardized measurement quantity for these non-visual effects does not exist, but would ease application...
May 22, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28545360/melatonin-effects-in-rem-sleep-behavior-disorder-associated-with-obstructive-sleep-apnea-syndrome-a-case-series
#10
Carolin Schaefer, Dieter Kunz, Frederik Bes
OBJECTIVES: REM sleep behavior disorder (RBD), with its main clinical symptoms of nightmares with dream-enacting behavior, is considered as a possible precursor of neurodegenerative disease. Obstructive Sleep Apnea Syndrome (OSAS) is known to be capable of provoking RBD-like symptoms by apneic event related arousals. The two sleep related pathologies must coincide in a relevant number of individuals because of overlapping prevalence in similar age groups. Until now RBD symptoms coexisting with OSAS are rarely described in scientific literature and in fact considered as OSAS mimicking RBD...
May 22, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28524007/the-proinflammatory-cytokine-gitrl-contributes-to-trail-mediated-neurotoxicity-in-the-hcn-2-human-neuronal-cell-line
#11
Giulia Di Benedetto, Salvatore Saccone, Laurence Lempereur, Nicole Ronsisvalle, Giuseppe Nocentini, Rodolfo Bianchini, Carlo Riccardi, Renato Bernardini, Giuseppina Cantarella
Cytokines belonging to the TNF superfamily play a relevant role in neurodegenerative processes. Tumor Necrosis Factor-Related Apoptosis-Inducing Ligand (TRAIL), released during neuronal injury, has proven to potently mediate and sustain neurotoxic processes leading to neuronal death. Similarly to TRAIL, the cytokine Glucocorticoid-induced TNF receptor ligand (GITRL) is able to transduce proapoptotic signals. In spite of the array of reports suggesting relationships between TRAIL and other cytokines, scanty data are, so far, available about a GITRL/TRAIL crosstalk...
May 18, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28521669/ppars-in-neurodegenerative-and-neuroinflammatory-pathways
#12
E Benedetti, L Cristiano, A Antonosante, M d'Angelo, B D'Angelo, S Selli, V Castelli, R Ippoliti, A Giordano, A Cimini
PPARs are lipid sensors activate by dietary lipids or their metabolites, mainly fatty acids and eicosanoids , that play critical roles in CNS biology, since brain has a very high lipid content and has the higher energetic metabolism in the body. In neurodegenerative diseases in addition to metabolic impariment also neuroinflammation is observed and PPARs are also closely linked to inflammatory process. Several studies have revealed a complicated relationship between the innate immune response and tissue metabolism...
May 17, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28521676/the-ultimate-outlier-transitional-care-for-persons-with-dementia-and-bpsd
#13
Jiska Cohen-Mansfield, Colleen A Ray, Tasmia Hai, Cristina Marcu, Brandy L Callahan, Morris Freedman
BACKGROUND: Transitional care units aim to assist caregivers who cannot manage the care for persons with dementia who manifest behavioral and psychological symptoms of dementia (BPSD). However, there is a dearth in research on such care units. OBJECTIVE: The current study reviewed one specialized transitional unit to better understand the characteristics of the persons with dementia and behavioral symptoms entering such unit. The study also looked at the change in terms of (a) BPSD, (b) use of psychotropic medications and (c) function of the patients in this unit...
May 15, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28482786/nanotechnology-based-theranostic-approaches-in-alzheimer-s-disease-management-current-status-and-future-perspective
#14
Javed Ahmad, Sohail Akhter, Md Rizwanullah, Mohammad Ahmed Khan, Lucie Pigeon, Richard T Addo, Nigel H Greig, Patrick Midoux, Chantal Pichon, Mohammad Amjad Kamal
Alzheimer's disease (AD), a cognitive dysfunction/dementia state amongst the elders is characterized by irreversible neurodegeneration due to varied pathophysiology. Up till now, anti-AD drugs having different pharmacology have been developed and used in clinic. Yet, these medications are not curative and only lowering the AD associated symptoms. Improvement in treatment outcome required drug targeting across the blood-brain barrier (BBB) to the central nervous system (CNS) in optimal therapeutic concentration...
May 8, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28474570/targeting-pparalpha-in-alzheimer-s-disease
#15
Barbara D Orio, Anna Fracassi, Maria Paola Cerù, Sandra Moreno
Alzheimer's disease (AD) is the result of a combination of genetic and environmental risk factors and the molecular mechanisms underlying cognitive decline are yet to be fully elucidated. The so-called "amyloid cascade hypothesis" has long been the prevailing paradigm for causation of disease, and today being revisited in relation to other pathogenic pathways, such as oxidative stress, neuroinflammation and lipid and glucose dysmetabolism. The peroxisome proliferator-activated receptors (PPARs) are expressed in the CNS and regulate many physiological processes, such as energy metabolism, neurotransmission, redox homeostasis, autophagy and cell cycle...
May 4, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28474569/the-involvement-of-post-translational-modifications-in-alzheimer-s-disease
#16
S Marcelli, Massimo Corbo, Filomena Iannuzzi, Lucia Negri, Fabio Blandini, Robert Nisticò, M Feligioni
Alzheimer’s disease (AD) is a neurodegenerative disorder recognized as the most common cause of chronic dementia among the ageing population. AD is histopathologically characterized by progressive loss of neurons and deposits of insoluble proteins, primarily composed of amyloid-β pelaques and neurofibrillary tangles (NFTs). Several molecular processes contribute to the formation of AD cellular hallmarks. Among them, post-translational modifications (PTMs) represent an attractive mechanism underlying the formation of covalent bonds between chemical groups/peptides to target proteins, which ultimately result modified in their function...
May 4, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28474568/lipid-biomarkers-in-alzheimer-s-disease
#17
Amira Zarrouk, Meryam Debbabi, Maryem Bezine, El Mostafa Karym, Asmaa Badreddine, Olivier Rouaud, Thibault Moreau, Mustapha Cherkaoui-Malki, Mohamed El Ayeb, Boubker Nasser, Mohamed Hammami, Gérard Lizard
Alzheimer's disease (AD) is the most frequent form of dementia. It is characterized by three successive stages (preclinical, mild cognitive impairment (MCI), and dementia), which are determined with a panel of complementary tests including behavioral and biochemical tests and imaging methods. Currently accepted biomarkers of AD include levels of brain chemicals related to amyloid or tau, and imaging-derived estimates of the size and metabolic activity of specific brain regions. At the moment, the pathogenesis of AD is still poorly understood but some studies support a link between lipid metabolism disorders and AD...
May 4, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28474567/reduced-mitochondrial-activity-is-early-and-steady-in-the-entorhinal-cortex-but-it-is-mainly-unmodified-in-the-frontal-cortex-in-alzheimer-s-disease
#18
Mercedes Armand-Ugon, Belen Ansoleaga, Sara Berjaoui, Isidro Ferrer
Background It is well established that mitochondrial damage plays a role in the pathophysiology of Alzheimer's disease (AD). However, studies carried out in humans barely contemplate regional differences with disease progression. Objective To study the expression of selected nuclear genes encoding subunits of the mitochondrial complexes and the activity of mitochondrial complexes in AD, in two regions: the entorhinal cortex (EC) and frontal cortex area 8 (FC). Methods Frozen samples from 148 cases processed for gene expression by qRT-PCR and determination of individual activities of mitochondrial complexes I, II, IV and V using commercial kits and home-made assays...
May 4, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28462717/genetic-features-of-mapt-grn-c9orf72-and-chchd10-gene-mutations-in-chinese-patients-with-frontotemporal-dementia
#19
Xiang-Qian Che, Qian-Hua Zhao, Yue Huang, Xia Li, Ru-Jing Ren, Sheng-Di Chen, Gang Wang, Qi-Hao Guo
Mutations in microtubule associated protein tau (MAPT), progranulin (GRN), chromosome 9 open-reading frame 72 (C9orf72) and CHCHD10 genes have been reported causing frontotemporal dementia (FTD) in different populations. However, collective analysis of mutations in these four genes in Chinese FTD patients has not been reported yet. The aim of this study was to investigate the geneticfeatures of Chinese patients with MAPT, PGRN, C9orf72 or CHCHD10 gene mutations in a FTD cohort recruited from multi clinical centers in Shanghai metropolitan areas, China...
April 25, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28443508/nutritional-deficiency-in-early-life-facilitates-aging-associated-cognitive-decline
#20
Yu Kang, Yun Zhang, Zijuan Feng, Mingjing Liu, Yanhua Li, Huan Yang, Dan Wang, Lingling Zheng, Dandan Lou, Liangping Cheng, Chunjiang Chen, Weitao Zhou, Yi Feng, Xiaoyong Li, Jianzhong Duan, Mengjiao Yu, Shou Yang, Yuhang Liu, Xin Wang, Bo Deng, Chenghui Liu, Xiuqing Yao, Chi Zhu, Chunrong Liang, Xiaolong Zeng, Sisi Ren, Qunying Li, Yin Zhong, Yong Zhang, Jun Kang, Yong Yan, Huaqing Meng, Zhaohui Zhong, Weihui Zhou, Yanjiang Wang, Tingyu Li, Weihong Song
BACKGROUND: Nutrition is important for the fetal developmental programming. Nutritional deficiency in early life could increase the susceptibility to many aging-related disorders including cognitive decline. OBJECTIVE: Our study aims to investigate the effect of early famine exposure on aging-associated cognitive function. METHODS: We recruited 6790 subjects born between 1956 to 1964 during which the Great Chinese Famine occurred (1959-1961)...
April 24, 2017: Current Alzheimer Research
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