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Alzheimers and vascular disease

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https://www.readbyqxmd.com/read/29222909/an-emerging-role-of-astrocytes-in-vascular-contributions-to-cognitive-impairment-and-dementia-vcid
#1
REVIEW
Brittani R Price, Christopher M Norris, Pradoldej Sompol, Donna M Wilcock
Vascular contributions to cognitive impairment and dementia (VCID) is understood to be the second most common cause of dementia after Alzheimer's disease (AD), and is also a frequent co-morbidity with AD. While VCID is widely acknowledged as a key contributor to dementia, the mechanistic underpinnings of VCID remain poorly understood. In this review, we address the potential role of astrocytes in the pathophysiology of VCID. The vast majority of the blood vessels in the brain are surrounded by astrocytic end-feet...
December 9, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29222544/association-of-age-related-hearing-loss-with-cognitive-function-cognitive-impairment-and-dementia-a-systematic-review-and-meta-analysis
#2
David G Loughrey, Michelle E Kelly, George A Kelley, Sabina Brennan, Brian A Lawlor
Importance: Epidemiologic research on the possible link between age-related hearing loss (ARHL) and cognitive decline and dementia has produced inconsistent results. Clarifying this association is of interest because ARHL may be a risk factor for outcomes of clinical dementia. Objectives: To examine and estimate the association between ARHL and cognitive function, cognitive impairment, and dementia through a systematic review and meta-analysis. Data Sources and Study Selection: A search of PubMed, the Cochrane Library, EMBASE, and SCOPUS from inception to April 15, 2016, with cross-referencing of retrieved studies and personal files for potentially eligible studies was performed...
December 7, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/29215310/apolipoprotein-e4-mediates-insulin-resistance-associated-cerebrovascular-dysfunction-and-the-post-prandial-response
#3
Lance A Johnson, Eileen Ruth Torres, Sydney Weber Boutros, Esha Patel, Tunde Akinyeke, Nabil J Alkayed, Jacob Raber
Metabolic dysfunction, commonly a result of diets high in saturated fats and sugar, is associated with impaired cognitive function and an increased risk of age-related cognitive decline (ACD) and Alzheimer's disease (AD). Compared to the E3 isoform of apolipoprotein (apoE), the E4 isoform is a major genetic risk factor for ACD, AD, and for developing cognitive impairments following various environmental challenges, including dietary challenges such as a high-fat diet (HFD). Both insulin resistance (IR) and E4 are associated with metabolic and vascular impairments...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29210074/white-matter-degeneration-in-vascular-and-other-ageing-related-dementias
#4
REVIEW
Yoshika Hase, Karen Horsburgh, Masafumi Ihara, Raj N Kalaria
Advances in neuroimaging have enabled greater understanding of the progression of cerebral degenerative processes associated with ageing-related dementias. Leukoaraiosis or rarefied white matter (WM) originally described on computed tomography is one of the most prominent changes which occurs in older age. White matter hyperintensities (WMH) evident on magnetic resonance imaging have become commonplace to describe WM changes in relation to cognitive dysfunction, types of stroke injury, cerebral small vessel disease and neurodegenerative disorders including Alzheimer's disease...
December 6, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29209923/plasma-microparticles-in-alzheimer-s-disease-the-role-of-vascular-dysfunction
#5
Soheila Hosseinzadeh, Maryam Noroozian, Esmaeil Mortaz, Kazem Mousavizadeh
Cerebrovascular lesions, a potent stimulus for endothelial cell activation, trigger cognitive and degenerative changes and contribute to pathology of Alzheimer's disease (AD). Circulating microparticles (MPs) are actively involved in the pathogenesis of AD and cerebrovascular diseases, which share common vascular risk factors. We examined the plasma changes of endothelial MPs (EMPs) and platelet MPs (PMPs) in AD patients with vascular risk factors. The plasma Annexin V+ CD 41a- CD144+ EMPs and Annexin V+ CD41a+ CD144- PMPs of 37 patients with AD, with or without vascular risk factors (hypertension, diabetes, dyslipidemia, stroke, coronary artery disease, and smoking), and 10 age-matched controls were quantified by flow cytometry...
December 5, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/29205020/-genetic-code-of-brain-ageing
#6
Pentti Tienari, Liisa Myllykangas
Neurons are more susceptible than other cells to the effects of ageing, since most of them are not capable of dividing, and they consume plenty of energy. In the "genetic code of brain ageing", central role is played by the genes that regulate the risk of Alzheimer's disease and vascular diseases. Genes have been recognized underlying memory disorders and longevity. Genetic studies have revealed metabolic routes, including fat and energy metabolism, that can be influenced by an individual through living habits, and also through structures maintaining social activity...
2017: Duodecim; Lääketieteellinen Aikakauskirja
https://www.readbyqxmd.com/read/29198136/hyperhomocysteinemia-induced-gene-expression-changes-in-the-cell-types-of-the-brain
#7
Erica M Weekman, Abigail E Woolums, Tiffany L Sudduth, Donna M Wilcock
High plasma levels of homocysteine, termed hyperhomocysteinemia, are a risk factor for vascular cognitive impairment and dementia, which is the second leading cause of dementia. While hyperhomocysteinemia induces microhemorrhages and cognitive decline in mice, the specific effect of hyperhomocysteinemia on each cell type remains unknown. We took separate cultures of astrocytes, microglia, endothelial cells, and neuronal cells and treated each with moderate levels of homocysteine for 24, 48, 72, and 96 hr...
November 2017: ASN Neuro
https://www.readbyqxmd.com/read/29198043/the-diagnosis-of-dementias-a-practical-tool-not-to-miss-rare-causes
#8
Camilla Ferrari, Benedetta Nacmias, Sandro Sorbi
Dementia represents one of the most diffuse disorders of our Era. Alzheimer's disease is the principle cause of dementia worldwide. Metabolic, infectious, autoimmune, inflammatory, and genetic dementias represent a not negligible number of disorders, with increasing numbers in younger subjects. Due to the heterogeneity of patients and disorders, the diagnosis of dementia is challenging. In the present article, we propose a practical diagnostic approach following the two-step investigation procedure. The first step includes basic blood tests and brain neuroimaging, performed on all patients...
December 2, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/29196581/increased-midlife-triglycerides-predict-brain-%C3%AE-amyloid-and-tau-pathology-20-years-later
#9
Katarina Nägga, Anna-Märta Gustavsson, Erik Stomrud, Daniel Lindqvist, Danielle van Westen, Kaj Blennow, Henrik Zetterberg, Olle Melander, Oskar Hansson
OBJECTIVE: To evaluate the effect of midlife lipid levels on Alzheimer brain pathology 20 years later in cognitively normal elderly individuals. METHODS: This is a longitudinal cohort study of 318 cognitively normal individuals with data on fasting lipid levels at midlife (mean age 54 years). Presence of β-amyloid (Aβ) and tau pathologies 20 years later (mean age 73 years) were detected by quantifying Alzheimer disease (AD) biomarkers in CSF. In a subset (n = 134), Aβ (18F-flutemetamol) PET was also performed...
December 1, 2017: Neurology
https://www.readbyqxmd.com/read/29195510/cerebrovascular-pathology-in-down-syndrome-and-alzheimer-disease
#10
Elizabeth Head, Michael J Phelan, Eric Doran, Ronald C Kim, Wayne W Poon, Frederick A Schmitt, Ira T Lott
People with Down syndrome (DS) are at high risk for developing Alzheimer disease (AD) with age. Typically, by age 40 years, most people with DS have sufficient neuropathology for an AD diagnosis. Interestingly, atherosclerosis and hypertension are atypical in DS with age, suggesting the lack of these vascular risk factors may be associated with reduced cerebrovascular pathology. However, because the extra copy of APP leads to increased beta-amyloid peptide (Aβ) accumulation in DS, we hypothesized that there would be more extensive and widespread cerebral amyloid angiopathy (CAA) with age in DS relative to sporadic AD...
December 1, 2017: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/29191087/neuroprotective-effect-of-formononetin-in-ameliorating-learning-and-memory-impairment-in-mouse-model-of-alzheimer-s-disease
#11
Hong-Xin Fei, Ying-Bo Zhang, Ting Liu, Xiao-Jie Zhang, Shu-Liang Wu
Alzheimer's disease (AD) is the most common cause of dementia among elderly population. Deranged β-amyloid (Aβ) trafficking across the blood-brain barrier is known to be a critical element in the pathogenesis of AD. In the vascular endothelial cells of hippocampus, Aβ transport is mainly mediated by low-density lipoprotein-associated protein 1 (LRP1) and the receptor for advanced glycation end (RAGE) products; therefore, LRP1 and RAGE endothelial cells are potential therapeutic targets for AD. In this study, we explored the effects of Formononetin (FMN) on learning and memory improvement in APP/PS1 mice and the related mechanisms...
December 1, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/29189301/assessing-fitness-to-drive-in-patients-with-different-types-of-dementia
#12
Dafne Piersma, Anselm B M Fuermaier, Dick De Waard, Ragnhild J Davidse, Jolieke De Groot, Michelle J A Doumen, Ruud A Bredewoud, René Claesen, Afina W Lemstra, Philip Scheltens, Annemiek Vermeeren, Rudolf Ponds, Frans Verhey, Peter P De Deyn, Wiebo H Brouwer, Oliver Tucha
Dementia is a risk factor for unsafe driving. Therefore, an assessment strategy has recently been developed for the prediction of fitness to drive in patients with the Alzheimer disease (AD). The aim of this study was to investigate whether this strategy is also predictive of fitness to drive in patients with non-AD dementia, that is, vascular dementia, frontotemporal dementia, and dementia with Lewy bodies. Predictors were derived from 3 types of assessment: clinical interviews, neuropsychological tests, and driving simulator rides...
November 17, 2017: Alzheimer Disease and Associated Disorders
https://www.readbyqxmd.com/read/29178502/survival-times-with-and-without-tube-feeding-in-patients-with-dementia-or-psychiatric-diseases-in-japan
#13
Keiko Takayama, Keisuke Hirayama, Akihiko Hirao, Keiko Kondo, Hideki Hayashi, Koichi Kadota, Hiroyuki Asaba, Hideki Ishizu, Kenji Nakata, Kairi Kurisu, Etsuko Oshima, Osamu Yokota, Norihito Yamada, Seishi Terada
BACKGROUND: It is widely supposed that there has been no evidence of increased survival in patients with advanced dementia receiving enteral tube feeding. However, more than a few studies have reported no harmful outcome from tube feeding in dementia patients compared to in patients without dementia. METHODS: This was a retrospective study. Nine psychiatric hospitals in Okayama Prefecture participated in this survey. All inpatients fulfilling the entry criteria were evaluated...
November 2017: Psychogeriatrics: the Official Journal of the Japanese Psychogeriatric Society
https://www.readbyqxmd.com/read/29176753/centiloid-method-evaluation-for-amyloid-pet-of-subcortical-vascular-dementia
#14
Hyuk Jin Yun, Seung Hwan Moon, Hee Jin Kim, Samuel N Lockhart, Yearn Seong Choe, Kyung Han Lee, Duk L Na, Jong-Min Lee, Sang Won Seo
Reference region selection is important for proper amyloid PET analysis, especially in subcortical vascular dementia (SVaD) patients. We investigated reference region differences between SVaD and Alzheimer's disease (AD) using Centiloid scores. In 57 [C-11] Pittsburgh compound B (PiB) positive (+) AD and 23 PiB (+) SVaD patients, we assessed standardized PiB uptake and Centiloid scores in disease-specific cortical regions, with several reference regions: cerebellar gray (CG), whole cerebellum (WC), WC with brainstem (WC + B), pons, and white matter (WM)...
November 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29171642/dietary-supplements-for-cognitive-impairment
#15
Javier Olivera-Pueyo, Carmelo Pelegrín-Valero
Alzheimer disease and the other neurodegenerative dementias as yet have no curative treatment. For this reason, the prevention of these conditions and non-pharmacological treatments are important fields of research at present. The Mediterranean diet (rich in fruits, vegetables, legumes, and olive oil, with regular fish consumption and low consumption of dairy products and meats) has been shown to reduce the incidence of mild cognitive impairment (MCI) and, probably, the conversion of MCI to dementia. Vitamins, especially vitamin E and the vitamins of the B group, have also been associated with the prevention of cognitive impairment due to their antioxidant effects...
September 2017: Actas Españolas de Psiquiatría
https://www.readbyqxmd.com/read/29170725/reduction-of-cognitive-decline-in-patients-with-or-at-high-risk-for-diabetes
#16
Gladys E Maestre
Purpose of review: The incidence of Alzheimer's disease and related disorders is expected to triple by 2050. People with type 2 diabetes and prediabetes have a higher risk of cognitive dysfunction, including Alzheimer's disease and vascular dementia. Controversy remains about when and how to prevent and treat cognitive dysfunction in people with or at high risk of diabetes. Recent findings: In our review of ongoing clinical trials, we have found that there has been an increase in the number of studies assessing the efficacy of pharmacological and non-pharmacological approaches to prevent or slow down cognitive impairment among people with or at high risk of diabetes...
September 2017: Current Geriatrics Reports
https://www.readbyqxmd.com/read/29169581/vitamin-d-status-is-associated-with-executive-function-a-decade-later-data-from-the-women-s-healthy-ageing-project
#17
Alicia M Goodwill, Stephen Campbell, Steven Simpson, Maria Bisignano, Cherie Chiang, Lorraine Dennerstein, Cassandra Szoeke
OBJECTIVES: Vitamin D deficiency has been associated with cognitive decline and dementia in older adults. However, there is a paucity of studies assessing whether this association manifests from midlife. Given the long prodromal stage of dementia, we investigated the association between midlife vitamin D and cognition 10 years later. STUDY DESIGN: 252 participants (aged 55-67 years) from the Women's Healthy Ageing Project had baseline (2002) vitamin D and neuropsychological measures assessed...
January 2018: Maturitas
https://www.readbyqxmd.com/read/29168580/resveratrol-pterostilbene-and-dementia
#18
REVIEW
Klaus W Lange, Shiming Li
Resveratrol is a natural phytoestrogen with neuroprotective properties. Polyphenolic compounds including resveratrol exert in vitro antioxidant, anti-inflammatory, and antiamyloid effects. Resveratrol and its derivative pterostilbene are able to cross the blood-brain barrier and to influence brain activity. The present short review summarizes the available evidence regarding the effects of these polyphenols on pathology and cognition in animal models and human subjects with dementia. Numerous investigations in cellular and mammalian models have associated resveratrol and pterostilbene with protection against dementia syndromes such as Alzheimer's disease (AD) and vascular dementia...
November 23, 2017: BioFactors
https://www.readbyqxmd.com/read/29165383/a-mini-review-of-the-nadph-oxidases-in-vascular-dementia-correlation-with-noxs-and-risk-factors-for-vad
#19
REVIEW
Dong-Hee Choi, Jongmin Lee
Oxidative stress (OS) is one of the factors that cause dementia conditions such as Alzheimer's disease and vascular dementia (VaD). In the pathogenesis of VaD, OS is associated with risk factors that include increased age, hypertension, and stroke. Nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (NOXs) are a molecular source of reactive oxygen species (ROS). According to recent studies, inhibition of NOX activity can reduce cognitive impairment in animal models of VaD. In this article, we review the evidence linking cognitive impairment with NOX-dependent OS, including the vascular NOX and non-vascular NOX systems, in VaD...
November 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29163128/insulin-resistance-and-alzheimer-s-disease-bioenergetic-linkages
#20
REVIEW
Bryan J Neth, Suzanne Craft
Metabolic dysfunction is a well-established feature of Alzheimer's disease (AD), evidenced by brain glucose hypometabolism that can be observed potentially decades prior to the development of AD symptoms. Furthermore, there is mounting support for an association between metabolic disease and the development of AD and related dementias. Individuals with insulin resistance, type 2 diabetes mellitus (T2D), hyperlipidemia, obesity, or other metabolic disease may have increased risk for the development of AD and similar conditions, such as vascular dementia...
2017: Frontiers in Aging Neuroscience
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