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https://www.readbyqxmd.com/read/28332351/metabolism-centric-overview-of-the-pathogenesis-of-alzheimer-s-disease
#1
REVIEW
Somang Kang, Yong Ho Lee, Jong Eun Lee
Alzheimer's disease (AD) is a degenerative brain disease and the most common cause of dementia. AD is characterized by the extracellular amyloid beta (Aβ) plaques and intraneuronal deposits of neurofibrillary tangles (NFTs). Recently, as aging has become a familiar phenomenon around the world, patients with AD are increasing in number. Thus, many researchers are working toward finding effective therapeutics for AD focused on Aβ hypothesis, although there has been no success yet. In this review paper, we suggest that AD is a metabolic disease and that we should focus on metabolites that are affected by metabolic alterations to find effective therapeutics for AD...
May 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/28329340/baseline-characteristics-of-participants-in-the-aspree-aspirin-in-reducing-events-in-the-elderly-study
#2
John J McNeil, Robyn L Woods, Mark R Nelson, Anne M Murray, Christopher M Reid, Brenda Kirpach, Elsdon Storey, Raj C Shah, Rory S Wolfe, Andrew M Tonkin, Anne B Newman, Jeff D Williamson, Jessica E Lockery, Karen L Margolis, Michael E Ernst, Walter P Abhayaratna, Nigel Stocks, Sharyn M Fitzgerald, Ruth E Trevaks, Suzanne G Orchard, Lawrence J Beilin, Geoffrey A Donnan, Peter Gibbs, Colin I Johnston, Richard H Grimm
Background: There are no primary prevention trials of aspirin with relevant geriatric outcomes in elderly people. ASPirin in Reducing Events in the Elderly (ASPREE) is a placebo-controlled trial of low-dose aspirin that will determine whether 5 years of daily 100-mg enteric-coated aspirin extends disability-free and dementia-free life in a healthy elderly population and whether these benefits outweigh the risks. Methods: Set in primary care, this randomized double-blind placebo-controlled trial has a composite primary endpoint of death, incident dementia or persistent physical disability...
January 20, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28329031/who-take-naps-self-reported-and-objectively-measured-napping-in-very-old-women
#3
Yue Leng, Katie Stone, Sonia Ancoli-Israel, Kenneth Covinsky, Kristine Yaffe
Background: Despite the widespread belief that napping is common among older adults, little is known about the correlates of napping. We examined the prevalence and correlates of self-reported and objectively measured napping among very old women. Methods: We studied 2,675 community-dwelling women (mean age 84.5 ± 3.7 years; range 79-96). Self-reported napping was defined as a report of regular napping for ≥1 hour per day. Individual objective naps were defined as ≥5 consecutive minutes of inactivity as measured by actigraphy and women were characterized as "objective nappers" if they had at least 60 minutes of naps per day...
February 18, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28324763/interaction-of-apoe-e4-and-poor-glycemic-control-predicts-white-matter-hyperintensity-growth-from-73-to-76
#4
Simon R Cox, Stuart J Ritchie, David Alexander Dickie, Alison Pattie, Natalie A Royle, Janie Corley, Benjamin S Aribisala, Sarah E Harris, Maria Valdés Hernández, Alan J Gow, Susana Muñoz Maniega, John M Starr, Mark E Bastin, Joanna M Wardlaw, Ian J Deary
We examined whether apolipoprotein E (APOE) status interacts with vascular risk factors (VRFs) to predict the progression of white matter hyperintensities (WMHs) on brain MRI scans over a specific period of life in older age when the risk of dementia increases. At age 73 years, baseline VRFs were assessed via self-reported history of diabetes, hypertension, smoking, and hypercholesterolemia, and via objective measures of blood HbA1c, body mass index, diastolic and systolic blood pressure, and blood high-density lipoprotein to total cholesterol (HDL) ratio...
February 27, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28322157/diabetes-related-neurological-implications-and-pharmacogenomics
#5
Rojas Carranza Camilo Andrés, Bustos Cruz Rosa Helena, Pino Pinzón Carmen Juliana, Ariza Marquez Yeimy Viviana, Gómez Bello Rosa Margarita, Cañadas Garre Marisa
Diabetes mellitus (DM) is the most commonly occurring cause of neuropathy around the world and is beginning to grow in countries where there is a risk of obesity. DM Type II, (T2DM) is a common age-related disease and is a major health concern, particularly in developed countries in Europe where the population is aging. T2DM is a chronic disease which is characterised by hyperglycemia, hyperinsulinemia and insulin resistance, together with the body's inability to use glucose as energy. Such metabolic disorder produces a chronic inflammatory state, as well as changes in lipid metabolism leading to hypertriglyceridemia, thereby producing chronic deterioration of the organs and premature morbidity and mortality...
March 17, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28321840/association-of-proton-pump-inhibitors-usage-with-risk-of-pneumonia-in-dementia-patients
#6
Sai-Wai Ho, Ying-Hock Teng, Shun-Fa Yang, Han-Wei Yeh, Yu-Hsun Wang, Ming-Chih Chou, Chao-Bin Yeh
OBJECTIVES: To determine the association between usages of proton pump inhibitors (PPIs) and subsequent risk of pneumonia in dementia patients. DESIGN: Retrospective cohort study. SETTING: Taiwanese National Health Insurance Research Database. PARTICIPANTS: The study cohort consisted of 786 dementia patients with new PPI usage and 786 matched dementia patients without PPI usage. MEASUREMENTS: The study endpoint was defined as the occurrence of pneumonia...
March 21, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28316001/associations-of-polymorphisms-in-the-candidate-genes-for-alzheimer-s-disease-bin1-clu-cr1-and-picalm-with-gestational-diabetes-and-impaired-glucose-tolerance
#7
Gabriela Vacínová, D Vejražková, P Lukášová, O Lischková, K Dvořáková, R Rusina, I Holmerová, H Vaňková, J Včelák, B Bendlová, M Vaňková
Alzheimer's disease (AD) is the most common type of dementia, with a prevalence that is rising every year. AD is associated with type 2 diabetes mellitus (T2DM) and insulin resistance, and is therefore sometimes called "type 3 diabetes mellitus". The aim of this study was to examine whether the variants of some candidate genes involved in the development of AD, namely BIN1 (rs744373), CLU (rs11136000), CR1 (rs3818361), and PICALM (rs3851179), are related to several disorders of glucose metabolism-gestational diabetes (GDM), T2DM and impaired glucose tolerance (IGT)...
March 18, 2017: Molecular Biology Reports
https://www.readbyqxmd.com/read/28304291/insulin-resistance-and-future-cognitive-performance-and-cognitive-decline-in%C3%A2-elderly-patients-with-cardiovascular-disease
#8
Miri Lutski, Galit Weinstein, Uri Goldbourt, David Tanne
BACKGROUND: The role of insulin resistance (IR) in the pathogenesis of cognitive performance is not yet clear. OBJECTIVE: To examine the associations between IR and cognitive performance and change in cognitive functions two decades later in individuals with cardiovascular disease with and without diabetes. METHODS: A subset of 489 surviving patients (mean age at baseline 57.7±6.5 y) with coronary heart disease who previously participated in the secondary prevention Bezafibrate Infarction Prevention (BIP trial; 1990-1997), were included in the current neurocognitive study...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28302047/neuroinflammation-as-a-common-mechanism-associated-with-the-modifiable-risk-factors-for-alzheimer-s-and-parkinson-s-diseases
#9
Jordan Alexander McKenzie, Lindsay J Spielman, Caitlin B Pointer, Jessica R Lowry, Ekta Bajwa, Carolyn W Lee, Andis Klegeris
Alzheimer's disease (AD) and Parkinson's disease (PD) are among the most common causes of dementia, which increasingly contribute to morbidity and mortality worldwide. A common hallmark in the pathogenesis of these two diseases is neuroinflammation, which is initially triggered by the presence of pathological structures associated with these disorders. Chronic neuroinflammation is sustained by persistent and aberrant microglial activation in the brain, which results in damage and death of neighboring cells, including neurons and glial cells...
March 15, 2017: Current Aging Science
https://www.readbyqxmd.com/read/28289478/cerebral-white-matter-hyperintensities-on-mri-and-acceleration-of-epigenetic-aging-the-atherosclerosis-risk-in-communities-study
#10
Abhay Raina, Xiaoping Zhao, Megan L Grove, Jan Bressler, Rebecca F Gottesman, Weihua Guan, James S Pankow, Eric Boerwinkle, Thomas H Mosley, Myriam Fornage
BACKGROUND: Cerebral white matter hyperintensities (WMH) on magnetic resonance imaging (MRI) are part of the spectrum of brain vascular injury accompanying aging and are associated with a substantial risk of stroke and dementia. We investigated the association of cerebral WMH burden on MRI with a DNA methylation-based biomarker of aging, termed DNA methylation age acceleration, which represents the deviation of the DNA methylation-predicted age from the chronologic age. RESULTS: In this cross-sectional observational study of 713 African-American participants of the Atherosclerosis Risk in Communities study, aged 51-73 years, estimates of predicted age were obtained based on two algorithms (Hannum et al...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/28279958/gum-disease-is-an-early-sign-of-diabetes-and-tooth-loss-is-associated-with-risk-of-dementia-studies-find
#11
Susan Mayor
No abstract text is available yet for this article.
March 8, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28276776/brain-injury-with-diabetes-mellitus-evidence-mechanisms-and-treatment-implications
#12
Sherifa A Hamed
Diabetes mellitus is a risk for brain injury. Brain injury is associated with acute and chronic hyperglycaemia, insulin resistance, hyperinsulinemia, diabetic ketoacidosis (DKA) and hypoglycaemic events in diabetic patients. Hyperglycemia is a cause of cognitive deterioration, low intelligent quotient, neurodegeneration, brain aging, brain atrophy and dementia. Areas covered: The current review highlights the experimental, clinical, neuroimaging and neuropathological evidence of brain injury induced by diabetes and its associated metabolic derangements...
February 22, 2017: Expert Review of Clinical Pharmacology
https://www.readbyqxmd.com/read/28273786/influence-of-statin-therapy-at-time-of-stroke-onset-on-functional-outcome-among-patients-with-atrial-fibrillation
#13
Darae Ko, Jonathan L Thigpen, James A Otis, Kristen Forster, Lori Henault, Emily Quinn, Yorghos Tripodis, Peter B Berger, Nita Limdi, Elaine M Hylek
BACKGROUND: Statin pretreatment has been associated with reduced infarct volume in nonlacunar strokes. The effect of statins on functional outcomes of strokes related to atrial fibrillation (AF) is unknown. We aimed to define the influence of prestroke statin use on functional outcome in AF. METHODS: We assembled a cohort of consecutive ischemic stroke patients from 2006 to 2010. All patients underwent CT or MRI and were adjudicated by site investigators. AF was confirmed by electrocardiogram in 100% of patients...
January 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28273404/association-of-genetic-polymorphisms-of-claudin-1-with-small-vessel-vascular-dementia
#14
Vivek Srinivasan, Nady Braidy, Ying Hua Xu, Peter Xie, Kiran Kancherla, Sashiruben Chandramohan, Eunice Kar Wing Chan, Daniel Ky Chan
The most recent hypothesis of the development of small vessel vascular dementia (VaD) emphasises the role of blood-brain barrier (BBB) dysfunction. It is hypothesised that certain genetic polymorphisms of the BBB tight junction claudin-1 protein, in combination with adverse environmental risk factors, increase the risk of BBB dysfunction and small vessel VaD. In this case-control study, 97 control participants, with a mean Mini Mental State Exam (MMSE) score of 29.1, and 38 VaD participants were recruited and completed a questionnaire on their medical history and lifestyle factors...
March 8, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28272510/apolipoprotein-e4-and-insulin-resistance-interact-to-impair-cognition-and-alter-the-epigenome-and-metabolome
#15
Lance A Johnson, Eileen Ruth S Torres, Soren Impey, Jan F Stevens, Jacob Raber
Apolipoprotein E4 (E4) and type 2 diabetes are major risk factors for cognitive decline and late onset Alzheimer's disease (AD). E4-associated phenotypes and insulin resistance (IR) share several features and appear to interact in driving cognitive dysfunction. However, shared mechanisms that could explain their overlapping pathophysiology have yet to be found. We hypothesized that, compared to E3 mice, E4 mice would be more susceptible to the harmful cognitive effects of high fat diet (HFD)-induced IR due to apoE isoform-specific differences in brain metabolism...
March 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28269770/psychosocial-risk-and-protective-factors-and-incident-mild-cognitive-impairment-and-dementia-in-community-dwelling-elderly-findings-from-the-singapore-longitudinal-ageing-study
#16
Iris Rawtaer, Qi Gao, Ma Shwe Zin Nyunt, Lei Feng, Mei Sian Chong, Wee Shiong Lim, Tih-Shih Lee, Philip Yap, Keng Bee Yap, Tze Pin Ng
BACKGROUND: Indicators of social isolation or support such as living alone, loneliness, being married, and life satisfaction are possible psychosocial risk and protective factors for dementia. OBJECTIVE: We investigate the associations of these overlapping psychosocial factors with incident MCI-dementia (neurocognitive disorder) in a population cohort. METHODS: Using data from 1601 participants of the Singapore Longitudinal Ageing Study (SLAS) who were free of MCI or dementia at baseline and followed up to 8 years, we estimated hazards ratio (HR) of association of living alone, loneliness, being married, and high life satisfaction with incident MCI-dementia...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28254448/effects-of-pioglitazone-on-the-incidence-of-dementia-in-patients-with-diabetes
#17
Ping-Song Chou, Bo-Lin Ho, Yuan-Han Yang
AIMS: Peroxisome proliferator-activated receptor gamma (PPAR-γ) agonists exert neuroprotective effects in the brain. Therefore, in this population-based cohort study, we investigated the effects of pioglitazone, a PPAR-γ agonist, on the risk of dementia. METHODS: By using claims data from Taiwan's National Health Insurance Research Database, we included 6401 patients with diabetes who were treated with pioglitazone and 12,802 age- and sex-matched patients with diabetes who were never treated with pioglitazone from 2004 to 2009 and who were free of dementia at baseline...
January 20, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/28254441/omega-3-polyunsaturated-fatty-acids-suppress-the-inflammatory-responses-of-lipopolysaccharide-stimulated-mouse-microglia-by-activating-sirt1-pathways
#18
Takayuki Inoue, Masashi Tanaka, Shinya Masuda, Ryuji Ohue-Kitano, Hajime Yamakage, Kazuya Muranaka, Hiromichi Wada, Toru Kusakabe, Akira Shimatsu, Koji Hasegawa, Noriko Satoh-Asahara
Obesity and diabetes are known risk factors for dementia, and it is speculated that chronic neuroinflammation contributes to this increased risk. Microglia are brain-resident immune cells modulating the neuroinflammatory state. Eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), the major ω-3 polyunsaturated fatty acids (PUFAs) of fish oil, exhibit various effects, which include shifting microglia to the anti-inflammatory phenotype. To identify the molecular mechanisms involved, we examined the impact of EPA, DHA, and EPA+DHA on the lipopolysaccharide (LPS)-induced cytokine profiles and the associated signaling pathways in the mouse microglial line MG6...
February 22, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28253991/micrornas-as-peripheral-biomarkers-in-aging-and-age-related-diseases
#19
S Kumar, M Vijayan, J S Bhatti, P H Reddy
MicroRNAs (miRNAs) are found in the circulatory biofluids considering the important molecules for biomarker study in aging and age-related diseases. Blood or blood components (serum/plasma) are primary sources of circulatory miRNAs and can release these in cell-free form either bound with some protein components or encapsulated with microvesicle particles, called exosomes. miRNAs are quite stable in the peripheral circulation and can be detected by high-throughput techniques like qRT-PCR, microarray, and sequencing...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/28253990/mitochondrial-perturbation-in-alzheimer-s-disease-and-diabetes
#20
F Akhter, D Chen, S F Yan, S S Yan
Mitochondria are well-known cellular organelles that play a vital role in cellular bioenergetics, heme biosynthesis, thermogenesis, calcium homeostasis, lipid catabolism, and other metabolic activities. Given the extensive role of mitochondria in cell function, mitochondrial dysfunction plays a part in many diseases, including diabetes and Alzheimer's disease (AD). In most cases, there is overwhelming evidence that impaired mitochondrial function is a causative factor in these diseases. Studying mitochondrial function in diseased cells vs healthy cells may reveal the modified mechanisms and molecular components involved in specific disease states...
2017: Progress in Molecular Biology and Translational Science
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