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Alzheimer's prevention

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https://www.readbyqxmd.com/read/28337659/a20-in-multiple-sclerosis-and-parkinson-s-disease-clue-to-a-common-dysregulation-of-anti-inflammatory-pathways
#1
Simona Perga, Serena Martire, Francesca Montarolo, Nicole D Navone, Andrea Calvo, Giuseppe Fuda, Alberto Marchet, Daniela Leotta, Adriano Chiò, Antonio Bertolotto
Chronic inflammation significantly contributes to the pathogenesis of several neurodegenerative disorders. In physiological conditions, a chronic inflammatory state is prevented through the termination of the acute inflammatory response once the triggering insult is eliminated. Several mechanisms regulate the resolution of inflammation. Among these, a potent inhibitor of the pro-inflammatory NF-kB signaling known as A20 has emerged as a key player. Recent studies have shown reduced blood levels of A20 in the patients of diverse chronic inflammatory diseases...
March 23, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28335810/structured-relearning-of-activities-of-daily-living-in-dementia-the-randomized-controlled-redali-dem-trial-on-errorless-learning
#2
Sebastian Voigt-Radloff, Maartje M E de Werd, Rainer Leonhart, Danielle H E Boelen, Marcel G M Olde Rikkert, Klaus Fliessbach, Stefan Klöppel, Bernhard Heimbach, Andreas Fellgiebel, Richard Dodel, Gerhard W Eschweiler, Lucrezia Hausner, Roy P C Kessels, Michael Hüll
BACKGROUND: Errorless learning (EL) is a method for optimizing learning, which uses feed-forward instructions in order to prevent people from making mistakes during the learning process. The majority of previous studies on EL taught patients with dementia artificial tasks of little or no relevance for their daily lives. Furthermore, only a few controlled studies on EL have so far been performed and just a handful of studies have examined the long-term effects of EL. Tasks were not always trained in the patients' natural or home environment, limiting the external validity of these studies...
March 23, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28334857/co-cultures-with-stem-cell-derived-human-sensory-neurons-reveal-regulators-of-peripheral-myelination
#3
Alex J Clark, Malte S Kaller, Jorge Galino, Hugh J Willison, Simon Rinaldi, David L H Bennett
Effective bidirectional signalling between axons and Schwann cells is essential for both the development and maintenance of peripheral nerve function. We have established conditions by which human induced pluripotent stem cell-derived sensory neurons can be cultured with rat Schwann cells, and have produced for the first time long-term and stable myelinating co-cultures with human neurons. These cultures contain the specialized domains formed by axonal interaction with myelinating Schwann cells, such as clustered voltage-gated sodium channels at the node of Ranvier and Shaker-type potassium channel (Kv1...
February 15, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28330633/association-between-psychotropic-and-cardiovascular-iatrogenic-alerts-and-risk-of-hospitalizations-in-elderly-people-treated-for-dementia-a-self-controlled-case-series-study-based-on-the-matching-of-2-french-health-insurance-databases
#4
Lorene Zerah, Jacques Boddaert, Armelle Leperre-Desplanques, Dominique Bonnet-Zamponi, Marc Verny, Jean Deligne, Pierre-Yves Boelle
BACKGROUND: Elderly people are at risk of repeated hospitalizations, some of which may be drug related and preventable. In 2011, a group of French healthcare experts selected 5 iatrogenic alerts (IAs), based on criteria identified in a literature search and from their professional experience, to assess the appropriateness of medication in elderly patients. OBJECTIVES: Our objective was to examine the association between hospitalizations and IAs in elderly patients treated for Alzheimer disease who are particularly sensitive to adverse drug events...
March 18, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28327916/multilayer-modeling-and-analysis-of-human-brain-networks
#5
Manlio De Domenico
Understanding how the human brain is structured, and how its architecture is related to the function, is of paramount importance for a variety of applications, including, but not limited to, new ways to prevent, deal with and cure brain diseases, such as Alzheimer's or Parkinson's, and psychiatric disorders, such as Schizophrenia. The recent advances in structural and functional neuroimaging, together with the increasing attitude to interdisciplinary approaches involving computer science, mathematics and physics, are fostering interesting results from computational neuroscience, that are quite often based on the analysis of complex network representation of human brain...
February 6, 2017: GigaScience
https://www.readbyqxmd.com/read/28324298/circadian-disruption-associated-with-alzheimer-s-disease
#6
REVIEW
Yumna Saeed, Sabra M Abbott
Alzheimer's disease (AD) is increasing in prevalence and has a significant impact on caregivers and the healthcare system. One of the many physiologic process affected by AD is the circadian system, with disruption reflected in abnormalities of the sleep-wake cycle. This interaction is bidirectional, with circadian and sleep disruption influencing disease progression. Understanding the bidirectional relationship between AD and circadian disruption may allow for earlier recognition of the potential to develop dementia as well as improved targeted approaches for therapy...
April 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28323826/apoe-related-risk-of-mild-cognitive-impairment-and-dementia-for-prevention-trials-an-analysis-of-four-cohorts
#7
Jing Qian, Frank J Wolters, Alexa Beiser, Mary Haan, M Arfan Ikram, Jason Karlawish, Jessica B Langbaum, John M Neuhaus, Eric M Reiman, J Scott Roberts, Sudha Seshadri, Pierre N Tariot, Beth McCarty Woods, Rebecca A Betensky, Deborah Blacker
BACKGROUND: With the onset of prevention trials for individuals at high risk for Alzheimer disease, there is increasing need for accurate risk prediction to inform study design and enrollment, but available risk estimates are limited. We developed risk estimates for the incidence of mild cognitive impairment (MCI) or dementia among cognitively unimpaired individuals by APOE-e4 dose for the genetic disclosure process of the Alzheimer's Prevention Initiative Generation Study, a prevention trial in cognitively unimpaired APOE-e4/e4 homozygote individuals...
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28322422/use-it-or-lose-it-cognitive-activity-as-a-protec-tive-factor-for-cognitive-decline-associated-with-alzheimer-s-disease
#8
Panagiota Mistridis, Jutta Mata, Stefan Neuner-Jehle, Jean-Marie Annoni, Andreas Biedermann, Irene Bopp-Kistler, Dominique Brand, Andrea Brioschi Guevara, Hedi Decrey-Wick, Jean-François Démonet, Ulrich Hemmeter, Reto W Kressig, Brian Martin, Luca Rampa, Egemen Savaskan, Andreas Stuck, Philipp Tschopp, Dina Zekry, Andreas Monsch
Because of the worldwide aging of populations, Alzheimer's disease and other dementias constitute a devastating experience for patients and families as well as a major social and economic burden for both healthcare systems and society. Multiple potentially modifiable cardiovascular and lifestyle risk factors have been associated with this disease. Thus, modifying these risk factors and identifying protective factors represent important strategies to prevent and delay disease onset and to decrease the social burden...
March 21, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28322310/hormone-therapy-at-early-post-menopause-increases-cognitive-control-related-prefrontal-activity
#9
Romuald Girard, Elise Météreau, Julie Thomas, Michel Pugeat, Chen Qu, Jean-Claude Dreher
Clinical data have been equivocal and controversial as to the benefits to the brain and cognition of hormone therapy (HT) in postmenopausal women. Recent reevaluation of the role of estrogens proposed that HT may effectively prevent the deleterious effects of aging on cognition, and reduces the risks of dementia, including Alzheimer's disease, if initiated early at the beginning of menopause. Yet, little is known about the effects of HT on brain activation related to cognitive control, the ability to make flexible decisions in relation to internal goals...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28320515/hmgcs2-promotes-autophagic-degradation-of-the-amyloid-%C3%AE-precursor-protein-through-ketone-body-mediated-mechanisms
#10
Li-Tian Hu, Bing-Lin Zhu, Yu-Jie Lai, Yan Long, Jing-Si Zha, Xiao-Tong Hu, John H Zhang, Guo-Jun Chen
HMGCS2 (mitochondrial 3-hydroxy-3-methylglutaryl-COA synthase 2) is a control enzyme in ketogenesis. The mitochondrial localization and interaction with APP (β-amyloid precursor protein) suggest that HMGCS2 may play a role in the pathophysiology of AD (Alzheimer's disease). Here we report that overexpression of HMGCS2 decreased levels of APP and related CTFs (carboxy-terminal fragments), which was largely prevented by an autophagic inhibitor chloroquine. In addition, HMGCS2 enhancement of autophagic marker LC3II was diminished by rapamycin, an inhibitor of mechanistic target of rapamycin...
March 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28320234/gelidiella-acerosa-protects-against-a%C3%AE-25-35-induced-toxicity-and-memory-impairment-in-swiss-albino-mice-an-in-vivo-report
#11
Syad Arif Nisha, Kasi Pandima Devi
CONTEXT: Alzheimer's disease (AD) is believed to develop due to deposition of β-amyloid (Aβ) peptide. Hence, efforts are being made to develop potent drug that target amyloid hypothesis. OBJECTIVE: The present study explores the effect of the seaweed Gelidiella acerosa (Forsskål) Feldmann & Hamel (Gelidiellaceae) against Aβ 25-35 peptide in Swiss albino mice. MATERIALS AND METHODS: The animals were administered through intracerebroventricular (ICV) injection with the Aβ 25-35 peptide (10 μg/10 μL/ICV site) on 21st day of the pretreatment of G...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28319243/association-of-antioxidant-supplement-use-and-dementia-in-the-prevention-of-alzheimer-s-disease-by-vitamin-e-and-selenium-trial-preadvise
#12
Richard J Kryscio, Erin L Abner, Allison Caban-Holt, Mark Lovell, Phyllis Goodman, Amy K Darke, Monica Yee, John Crowley, Frederick A Schmitt
Importance: Oxidative stress is an established dementia pathway, but it is unknown if the use of antioxidant supplements can prevent dementia. Objective: To determine if antioxidant supplements (vitamin E or selenium) used alone or in combination can prevent dementia in asymptomatic older men. Design, Setting, and Participants: The Prevention of Alzheimer's Disease by Vitamin E and Selenium (PREADViSE) trial began as a double-blind randomized clinical trial in May 2002, which transformed into a cohort study from September 2009 to May 2015...
March 20, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28317487/impact-of-cytokines-and-chemokines-on-alzheimer-s-disease-neuropathological-hallmarks
#13
Catarina Domingues, Odete A B da Cruz E Silva, Ana Gabriela Henriques
Alzheimer's disease (AD) is the most common neurodegenerative disorder, neuropathologically characterized by aggregates of β-amyloid peptides, which deposit as senile plaques, and of TAU protein, which forms neurofibrillary tangles. It is now widely accepted that neuroinflammation is implicated in AD pathogenesis. Indeed, inflammatory mediators, such as cytokines and chemokines (chemotactic cytokines) can impact on the Alzheimer´s amyloid precursor protein by affecting its expression levels and amyloidogenic processing and/or β-amyloid aggregation...
March 17, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28317485/defective-insulin-signalling-mediated-by-inflammation-connects-obesity-to-alzheimer-disease-relevant-pharmacological-therapies-and-preventive-dietary-interventions
#14
Arantxa Rodriguez-Casado, Adolfo Toledano-Díaz, Adolfo Toledano
Recent evidence suggests that obesity, besides being a risk factor for cardiovascular events, also increases the risk of Alzheimer's disease. Insulin resistance is common in all cases of obesity and appears to be the linkage between both diseases. Obesity, often associated with excessive fat and sugar intake, represents a preclinical stage toward insulin resistance during which nutrition intervention is likely to have maximum effect. In this way, healthy lifestyles lifetime to prevent obesity-related modifiable risk factors such as inflammation, oxidative stress and metabolic disorders could be simultaneously beneficial for preserving cognition and controlling the Alzheimer's...
March 16, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28317262/hydroxytyrosol-restores-proper-insulin-signaling-in-an-astrocytic-model-of-alzheimer-s-disease
#15
M Carmen Crespo, Joao Tomé-Carneiro, Cristina Pintado, Alberto Dávalos, Francesco Visioli, Emma Burgos-Ramos
Recent epidemiological evidence demonstrated that diabetes is a risk factor for AD onset and development. Indeed, meta-analyses of longitudinal epidemiologic studies show that diabetes increases AD risk by 50-100%, being insulin resistance (IR) the main binding link between diabetes and AD. Astrocytes are the foremost cerebral macroglial cells and are responsible for converting glucose into lactate and transfer it to neurons that use it as fuel, but Aβ(1-42) impairs insulin signaling and glycogen storage. Recent prospective studies showed that the Mediterranean diet is associated with lower incidence of AD...
March 20, 2017: BioFactors
https://www.readbyqxmd.com/read/28316570/isometric-exercise-training-for-managing-vascular-risk-factors-in-mild-cognitive-impairment-and-alzheimer-s-disease
#16
REVIEW
Nicole C L Hess, Neil A Smart
Alzheimer's disease (AD) is the most common form of dementia diagnosed amongst the elderly. Mild cognitive impairment (MCI) is a condition often indicative of the earliest symptomatology of AD with 10%-15% of MCI patients reportedly progressing to a diagnosis of AD. Individuals with a history of vascular risk factors (VRF's) are considered high risk candidates for developing cognitive impairment in later life. Evidence suggests that vascular injury resulting from untreated VRF's promotes progression from MCI to AD and exacerbates the severity of dementia in AD, and neuroimaging studies have found that the neurodegenerative processes associated with AD are heavily driven by VRF's that promote cerebral hypoperfusion...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28316569/longitudinal-analysis-for-disease-progression-via-simultaneous-multi-relational-temporal-fused-learning
#17
Baiying Lei, Feng Jiang, Siping Chen, Dong Ni, Tianfu Wang
It is highly desirable to predict the progression of Alzheimer's disease (AD) of patients [e.g., to predict conversion of mild cognitive impairment (MCI) to AD], especially longitudinal prediction of AD is important for its early diagnosis. Currently, most existing methods predict different clinical scores using different models, or separately predict multiple scores at different future time points. Such approaches prevent coordinated learning of multiple predictions that can be used to jointly predict clinical scores at multiple future time points...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28315680/selenoprotein-s-is-required-for-clearance-of-c99-through-endoplasmic-reticulum-associated-degradation
#18
Jun Ki Jang, Ki Jun Park, Jea Hwang Lee, Kwan Young Ko, Seongman Kang, Ick Young Kim
Amyloid beta precursor protein (APP) is normally cleaved by α-secretase, but can also be cleaved by β-secretase (BACE1) to produce C99 fragments in the endoplasmic reticulum (ER) membrane. C99 is subsequently cleaved to amyloid β (Aβ), the aggregation of which is known to cause Alzheimer's disease. Therefore, C99 removing is for preventing the disease. Selenoprotein S (SelS) is an ER membrane protein participating in endoplasmic reticulum-associated degradation (ERAD), one of the stages in resolving ER stress of misfolded proteins accumulated in the ER...
March 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28315374/glp-1-analogue-cjc-1131-prevents-amyloid-%C3%AE-protein-induced-impirments-of-spatial-memory-and-synaptic-plasticity-in-rats
#19
Sheng-Xiao Zhang, Hong-Yan Cai, Xiao-Wen Ma, Li Yuan, Jun Zhang, Zhao-Jun Wang, Yu-Feng Li, Jin-Shun Qi
Although amyloid β protein (Aβ) has been recognized as one of the main pathological characteristics in the brain of Alzheimer's disease (AD), the effective strategies against Aβ neurotoxicity are still deficient up to now. Glucagon-like peptide 1 (GLP-1), a natural gut hormone, was found to be effective in modulating insulin signaling and neural protection, but short half-life limited its clinical application in AD treatment. CJC-1131, a newly designed GLP-1 analogue with very longer half-life, has shown good effectiveness in the treatment of type 2 diabetes mellitus (T2DM)...
March 14, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28315370/control-of-mitochondrial-physiology-and-cell-death-by-the-bcl-2-family-proteins-bax-and-bok
#20
Beatrice D'Orsi, Julia Mateyka, Jochen H M Prehn
Neuronal cell death is often triggered by events that involve intracellular increases in Ca(2+). Under resting conditions, the intracellular Ca(2+) concentration is tightly controlled by a number of extrusion and sequestering mechanisms involving the plasma membrane, mitochondria, and ER. These mechanisms act to prevent a disruption of neuronal ion homeostasis. As these processes require ATP, excessive Ca(2+) overloading may cause energy depletion, mitochondrial dysfunction, and may eventually lead to Ca(2+)-dependent cell death...
March 14, 2017: Neurochemistry International
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