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https://www.readbyqxmd.com/read/29151170/the-function-of-the-cellular-prion-protein-in-health-and-disease
#1
REVIEW
Joel C Watts, Matthew E C Bourkas, Hamza Arshad
The essential role of the cellular prion protein (PrP(C)) in prion disorders such as Creutzfeldt-Jakob disease is well documented. Moreover, evidence is accumulating that PrP(C) may act as a receptor for protein aggregates and transduce neurotoxic signals in more common neurodegenerative disorders, such as Alzheimer's disease. Although the pathological roles of PrP(C) have been thoroughly characterized, a general consensus on its physiological function within the brain has not yet been established. Knockout studies in various organisms, ranging from zebrafish to mice, have implicated PrP(C) in a diverse range of nervous system-related activities that include a key role in the maintenance of peripheral nerve myelination as well as a general ability to protect against neurotoxic stimuli...
November 18, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/29151169/parkinson-s-disease-experimental-models-and-reality
#2
REVIEW
Peizhou Jiang, Dennis W Dickson
Parkinson's disease (PD) is a chronic, progressive movement disorder of adults and the second most common neurodegenerative disease after Alzheimer's disease. Neuropathologic diagnosis of PD requires moderate-to-marked neuronal loss in the ventrolateral substantia nigra pars compacta and α-synuclein (αS) Lewy body pathology. Nigrostriatal dopaminergic neurodegeneration correlates with the Parkinsonian motor features, but involvement of other peripheral and central nervous system regions leads to a wide range of non-motor features...
November 18, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/29150540/increased-florbetapir-binding-in-the-temporal-neocortex-from-age-20-to-60-years
#3
Julie Gonneaud, Eider M Arenaza-Urquijo, Florence Mézenge, Brigitte Landeau, Malo Gaubert, Alexandre Bejanin, Robin de Flores, Miranka Wirth, Clémence Tomadesso, Géraldine Poisnel, Ahmed Abbas, Béatrice Desgranges, Gaël Chételat
OBJECTIVE: To improve our understanding of early β-amyloid (Aβ) accumulation processes using florbetapir-PET scan in 20- to 60-year-old individuals. METHODS: Seventy-six cognitively normal individuals aged 20 to 60 years, 57 cognitively normal older individuals (61-84 years old), and 70 patients with mild cognitive impairment or probable Alzheimer disease (AD) underwent a florbetapir-PET scan. Images were spatially normalized and scaled using the whole cerebellum...
November 17, 2017: Neurology
https://www.readbyqxmd.com/read/29150334/a-routinely-used-protein-staining-dye-acts-as-an-inhibitor-of-wild-type-and-mutant-alpha-synuclein-aggregation-and-modulator-of-neurotoxicity
#4
Nuzhat Ahsan, Ibrar Ahmed Siddique, Sarika Gupta, Avadhesha Surolia
Inhibition of amyloid formation along with modulation of toxicity employing small molecules is emerging as a potential therapeutic approach for protein misfolding disorders which includes Parkinson's disease, Alzheimer's disease and Multiple System Atrophy etc. Countless current interventional strategies for treating α-synucleinopathies consider using peptidic and non-peptidic inhibitors for arresting fibrillisation, disrupting existing fibrils and reducing associated toxicity. One group of molecules less exploited in this regard are triphenylmethane dyes...
October 12, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29150331/anti-amyloidogenic-and-anti-apoptotic-effect-of-%C3%AE-bisabolol-against-a%C3%AE-induced-neurotoxicity-in-pc12-cells
#5
Balakrishnan Shanmuganathan, Venkatesan Suryanarayanan, Sethuraman Sathya, Muralidharan Narenkumar, Sanjeev Kumar Singh, Kandasamy Ruckmani, Kasi Pandima Devi
Alzheimer's disease (AD) is a life-threatening neurodegenerative disorder leading to dementia, with a progressive decline in memory and other thinking skills of elderly populace. Of the multiple etiological factors of AD, the accumulation of senile plaques (SPs) particularly as Aβ oligomers correlates with the relentlessness cognitive impairment in AD patients and play a vital role in AD pathology. Since natural essential oil constituents have successfully served as a source of drugs for AD treatment, the present study aims at the in vitro and in silico investigation of anti-amyloidogenic potential and anti-apoptotic property of the α-bisabolol against Aβ25-35 induced neurotoxicity in PC12 cells...
October 10, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29150325/ilex-paraguariensis-potential-antioxidant-on-aluminium-toxicity-in-an-experimental-model-of-alzheimer-s-disease
#6
Pâmela M Bortoli, Carla Alves, Eduarda Costa, Ana Paula Vanin, Jéssica R Sofiatti, Diego P Siqueira, Rogério M Dallago, Helen Treichel, Gean Delise L P Vargas, Rosilene R Kaizer
Ilex paraguariensis, yerba mate is a native plant from the southern region of Brazil. Studies showed that yerba mate has an antioxidant potential, which could help to reduce the risk of developing neurodegenerative diseases, as Alzheimer's Disease (AD). It's known that I. paraguariensis grows in acid soils with aluminium (Al), which is bioavailable in these soils. Al has a neurotoxic potential related with the progression of neurological disorders. This study aim was to evaluate the potential of I. paraguariensis in the etiology of AD using strains of Caenorhabditis elegans and the concentration of Al and antioxidants in the yerba mate extract...
November 7, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29150293/a-unique-and-promising-combination-of-medications-for-the-treatment-of-alzheimer-s-disease
#7
James D Weinstein
At present there is no therapy for Alzheimer's Disease which completely stops the progressive dementia effecting late onset Alzheimer's Disease (AD) patients. It is felt that the main reason for this failure is that AD appears to be a disease caused by four major pathological processes. To date, efforts to develop treatments have addressed only one or another of these four etiologies. However, even a partially effective therapy against one cause allows the others, untreated, to continue their inexorable destruction of the neurons of the brain...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29150274/neuroprotective-potential-of-high-dose-biotin
#8
Mark F McCarty, James J DiNicolantonio
A recent controlled trial has established that high-dose biotin supplementation - 100 mg, three times daily - has a stabilizing effect on progression of multiple sclerosis (MS). Although this effect has been attributed to an optimization of biotin's essential cofactor role in the brain, a case can be made that direct stimulation of soluble guanylate cyclase (sGC) by pharmacological concentrations of biotin plays a key role in this regard. The utility of high-dose biotin in MS might reflect an anti-inflammatory effect of cGMP on the cerebral microvasculature, as well on oligodendrocyte differentiation and on Schwann cell production of neurotrophic factors thought to have potential for managing MS...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29150272/proposed-biochemistry-of-parkinson-s-and-alzheimer-s-diseases
#9
D S Robertson
The formation of brain compounds linked to Parkinson's and Alzheimer's brain diseases are described. Metabolic mechanisms involved in the control of reacting biochemicals are detailed. Relationships are established between the biochemical reactions, biochemical control mechanisms and the onset of Parkinson's, Alzheimer's. Treatments based on these relationships are proposed.
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29150013/retracted-menatetrenone-and-vitamin-d2-with-calcium-supplements-prevent-nonvertebral-fracture-in-elderly-women-with-alzheimer-s-disease
#10
Yoshihiro Sato, Tomohiro Kanoko, Kei Satoh, Jun Iwamoto
No abstract text is available yet for this article.
January 2018: Bone
https://www.readbyqxmd.com/read/29149835/forkhead-transcription-factors-formulating-a-foxo-target-for-cognitive-loss
#11
Kenneth Maiese
BACKGROUND: With almost 47 million individuals worldwide suffering from some aspect of dementia, it is clear that cognitive loss impacts a significant proportion of the global population. Unfortunately, definitive treatments to resolve or prevent the onset of cognitive loss are limited. In most cases such care is currently non-existent prompting the need for novel treatment strategies. METHODS: Mammalian forkhead transcription factors of the O class (FoxO) are one such avenue of investigation that offer an exciting potential to bring new treatments forward for disorders that involve cognitive loss...
November 15, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/29149788/knowledge-of-alzheimer-s-disease-among-vietnamese-americans-and-correlates-of-their-knowledge-about-alzheimer-s-disease
#12
Sang E Lee, Banghwa Lee Casado
The present study examined the knowledge of Alzheimer's disease and correlates of the disease knowledge among Vietnamese Americans. Cross-sectional survey interviews were conducted with 95 middle-aged and older Vietnamese Americans. Vietnamese Americans showed limited knowledge about Alzheimer's disease. Normalization of Alzheimer's disease in old age was prevalent. They lacked knowledge about treatment and cure of Alzheimer's disease. Those who reside longer in the U.S. and are more exposed to Alzheimer's disease are likely to have higher levels of Alzheimer's disease knowledge...
January 1, 2017: Dementia
https://www.readbyqxmd.com/read/29149763/formulation-and-anti-neurotoxic-activity-of-baicalein-incorporating-neutral-nanoliposome
#13
Farhang Aliakbari, Ali Akbar Shabani, Hassan Bardania, Hossein Mohammad-Beigi, Amir Tayaranian Marvian, Faezeh Dehghani Esmatabad, Abbas Ali Vafaei, Seyed Abbas Shojaosadati, Ali Akbar Saboury, Gunna Christiansen, Daniel E Otzen, Dina Morshedi
Despite extensive studies of the effects of herbal-derived small molecules in the biopharmaceutical and biomedical sciences, their low solubility and stability remain a challenge. Here we focus on baicalein, a small molecule showing potential against neurodegenerative diseases such as Parkinson's and Alzheimer's. However, therapeutic usage in vivo is challenged by low solubility and stability. To address this we have applied neutrally-charged nanoliposome (NLP) as carrier for baicalein. Baicalein was incorporated into NLP to form NLP-Ba at molar baicalain:lipid ratios of up to 1:3, giving a drug entrapment efficiency of 96...
November 11, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29149631/prostaglandin-j2-promotes-o-glcnacylation-raising-app-processing-by-%C3%AE-and-%C3%AE-secretases-relevance-to-alzheimer-s-disease
#14
Teneka Jean-Louis, Patricia Rockwell, Maria E Figueiredo-Pereira
Regulation of the amyloid precursor protein (APP) processing by α- and β-secretases is of special interest to Alzheimer's disease (AD), as these proteases prevent or mediate amyloid beta formation, respectively. Neuroinflammation is also implicated in AD. Our data demonstrate that the endogenous mediator of inflammation prostaglandin J2 (PGJ2) promotes full-length APP (FL-APP) processing by α- and β-secretases. The decrease in FL-APP was independent of proteasomal, lysosomal, calpain, caspase, and γ-secretase activities...
November 14, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29149110/-does-omega-3-supplementation-after-the-age-of-65-influence-cognitive-function-results-of-a-systematic-review
#15
REVIEW
J Baleztena, M Arana, M Bes-Rastrollo, M C Castellanos, M J Gozalo, M Ruiz-Canela
BACKGROUND: The percentage of the older population is progressively increasing as are diseases associated with aging such as cognitive decline (CD) and dementia. Observational epidemiological studies suggest that diets rich in omega 3 polyunsaturated fatty acids (w3-PUFA) might reduce the risk of CD and dementia. The main objective was to assess whether there is sufficient scientific evidence about the relationship between w3-PUFA supplementation in patients aged 65 or older and cognitive performance...
November 17, 2017: Anales del Sistema Sanitario de Navarra
https://www.readbyqxmd.com/read/29149058/neurotrophic-and-neuroregenerative-effects-of-gh-igf1
#16
Vittorio Emanuele Bianchi, Vittorio Locatelli, Laura Rizzi
INTRODUCTION: Human neurodegenerative diseases increase progressively with age and present a high social and economic burden. Growth hormone (GH) and insulin-like growth factor-1 (IGF-1) are both growth factors exerting trophic effects on neuronal regeneration in the central nervous system (CNS) and peripheral nervous system (PNS). GH and IGF-1 stimulate protein synthesis in neurons, glia, oligodendrocytes, and Schwann cells, and favor neuronal survival, inhibiting apoptosis. This study aims to evaluate the effect of GH and IGF-1 on neurons, and their possible therapeutic clinical applications on neuron regeneration in human subjects...
November 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29148800/size-and-shape-of-amyloid-fibrils-induced-by-ganglioside-nanoclusters-role-of-sialyl-oligosaccharide-in-fibril-formation
#17
Teruhiko Matsubara, Masaya Nishihara, Hanaki Yasumori, Mako Nakai, Katsuhiko Yanagisawa, Toshinori Sato
Ganglioside-enriched microdomains in the presynaptic neuronal membrane play a key role in the initiation of amyloid ß-protein (Aß) assembly related to Alzheimer's disease. We previously isolated lipids from a detergent-resistant membrane microdomain fraction of synaptosomes prepared from aged mouse brain and found that spherical Aß assemblies were formed on Aß-sensitive ganglioside nanoclusters (ASIGN) of reconstituted lipid bilayers in the synaptosomal fraction. In the present study, we investigated the role of oligosaccharides in Aß fibril formation induced by ganglioside-containing mixed lipid membranes that mimic the features of ASIGN...
November 17, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29148236/emerging-roles-of-er-stress-in-the-aetiology-and-pathogenesis-of-alzheimer-s-disease
#18
REVIEW
Yannis Gerakis, Claudio Hetz
Alzheimer's disease (AD) is a progressive neurodegenerative disease characterized by synaptic dysfunction and accumulation of abnormal aggregates formed by amyloid-β peptides or phophorylated Tau proteins. Accumulating evidence suggests that alterations in the buffering capacity of the proteostasis network is a salient feature of AD. The endoplasmic reticulum (ER) is the main compartment involved in protein folding and secretion and is drastically affected in AD neurons. ER stress triggers the activation of the Unfolded Protein Response (UPR), a signal transduction pathway that enforces adaptive programs to recover homeostasis or trigger apoptosis of irreversibly damaged cells...
November 17, 2017: FEBS Journal
https://www.readbyqxmd.com/read/29147638/a-sensitive-and-rapid-method-for-detecting-formaldehyde-in-brain-tissues
#19
Xiangpei Yue, Yaoyue Zhang, Wen Xing, Yutong Chen, Chenyang Mu, Zhan Miao, Peichun Ge, Tingting Li, Rongqiao He, Zhiqian Tong
The existing methods for detecting formaldehyde (FA) in brain samples are expensive and require sophisticated experimental procedures. Here, we established a highly sensitive and selective spectrophotometric method, which is based on a reaction in which FA reacts with colorless reagent 4-amino-3-penten-2-one (Fluoral-P) to produce a yellow compound, 3,5-diacetyl-1,4-dihydrolutidine (DDL), which can be detected by a spectrophotometer at 420 nm at room temperature. The sensitive response time point was found to be at the first hour, and the optimal pH of derivative reaction was pH 6...
2017: Analytical Cellular Pathology (Amsterdam)
https://www.readbyqxmd.com/read/29147557/the-diversity-and-utility-of-amyloid-fibrils-formed-by-short-amyloidogenic-peptides
#20
REVIEW
Zahraa S Al-Garawi, Kyle L Morris, Karen E Marshall, Jutta Eichler, Louise C Serpell
Amyloidogenic peptides are well known for their involvement in diseases such as type 2 diabetes and Alzheimer's disease. However, more recently, amyloid fibrils have been shown to provide scaffolding and protection as functional materials in a range of organisms from bacteria to humans. These roles highlight the incredible tensile strength of the cross-β amyloid architecture. Many amino acid sequences are able to self-assemble to form amyloid with a cross-β core. Here we describe our recent advances in understanding how sequence contributes to amyloidogenicity and structure...
December 6, 2017: Interface Focus
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