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https://www.readbyqxmd.com/read/28640219/topical-application-of-trisodium-ascorbyl-6-palmitate-2-phosphate-actively-supplies-ascorbate-to-skin-cells-in-an-ascorbate-transporter-independent-manner
#1
Shuichi Shibuya, Ikuyo Sakaguchi, Shintaro Ito, Eiko Kato, Kenji Watanabe, Naotaka Izuo, Takahiko Shimizu
Ascorbic acid (AA) possesses multiple beneficial functions, such as regulating collagen biosynthesis and redox balance in the skin. AA derivatives have been developed to overcome this compound's high fragility and to assist with AA supplementation to the skin. However, how AA derivatives are transferred into cells and converted to AA in the skin remains unclear. In the present study, we showed that AA treatment failed to increase the cellular AA level in the presence of AA transporter inhibitors, indicating an AA transporter-dependent action...
June 22, 2017: Nutrients
https://www.readbyqxmd.com/read/28636482/impact-of-freeway-weaving-segment-design-on-light-duty-vehicle-exhaust-emissions
#2
Qing Li, Fengxiang Qiao, Lei Yu, Shuyan Chen, Tiezhu Li
In United States, 26% of greenhouse gas emissions is emitted from the transportation sector, which meanwhile accompanies with enormous toxic emissions to humans, such as CO, NOx, and HC, approximately 2.5% and 2.44% of a total exhaust emission for a petrol and diesel engine, respectively. These exhaust emissions are typically subject to vehicles' intermittent operations, such as hard acceleration and hard braking. In practice, drivers are inclined to operate intermittently while driving through a weaving segment, due to complex vehicle maneuvering for weaving...
June 21, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28600141/chlorpyrifos-and-chlorpyrifos-oxon-impair-the-transport-of-membrane-bound-organelles-in-rat-cortical-axons
#3
Jie Gao, Sean X Naughton, Wayne D Beck, Caterina M Hernandez, Guangyu Wu, Zhe Wei, Xiangkun Yang, Michael G Bartlett, Alvin V Terry
Chlorpyrifos (CPF) is an extensively used organophosphorus pesticide that has recently come under increasing scrutiny due to environmental health concerns particularly its association with neurodevelopmental defects. While the insecticidal actions and acute toxicity of CPF are attributed to its oxon metabolite (CPO) which potently inhibits the cholinergic enzyme acetylcholinesterase (AChE), there is significant evidence that CPF, CPO, and other organophosphates may affect a variety of neuronal targets and processes that are not directly related to AChE...
June 12, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28528321/omega-3-fatty-acids-lipids-and-apoe-lipidation-in-alzheimer-s-disease-a-rationale-for-multi-nutrient-dementia-prevention
#4
Marcus O Grimm, Daniel Michaelson, Tobias Hartmann
In the last decade it has become obvious that Alzheimer's disease (AD) is closely linked to changes in lipids or lipid metabolism. One of the main pathological hallmarks of AD is amyloid-β (Aβ) deposition. Aβ is derived from sequential proteolytic processing of the amyloid precursor protein (APP). Interestingly, both, the APP and all APP secretases are transmembrane proteins which cleave APP close to and in the lipid bilayer. Moreover, apolipoprotein E4 (apoE4) has been identified as the most prevalent genetic risk factor for AD...
May 20, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28513463/alzheimer-s-disease-against-peptides-products-of-enzymatic-cleavage-app-protein-biological-pathobiological-and-physico-chemical-properties-of-fibrillating-peptides
#5
Małgorzata Marszałek
Various peptides products of enzymatic cleavage of key for Alzheimer's disease Amyloid Precursor Protein (APP) are well known, but still are matter of scientific debate. The Aβ type products are especially challenging for experimental and medical research. This paper outlines several, still poorly known, biological and medical processes such as peptides biology, i.e., formation, biodistribution, translocation, transport and finally removal from brain compartments and body fluids like Intracellular Fluid (ICF), Cerebrospinal Fluid (CSF), Interstitial Fluid (ISF), blood serum or urine...
May 17, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28496400/lrp1-modulates-app-intraneuronal-transport-and-processing-in-its-monomeric-and-dimeric-state
#6
Uta-Mareike Herr, Paul Strecker, Steffen E Storck, Carolin Thomas, Verena Rabiej, Anne Junker, Sandra Schilling, Nadine Schmidt, C Marie Dowds, Simone Eggert, Claus U Pietrzik, Stefan Kins
The low-density lipoprotein receptor-related protein 1, LRP1, interacts with APP and affects its processing. This is assumed to be mostly caused by the impact of LRP1 on APP endocytosis. More recently, also an interaction of APP and LRP1 early in the secretory pathway was reported whereat retention of LRP1 in the ER leads to decreased APP cell surface levels and in turn, to reduced Aβ secretion. Here, we extended the biochemical and immunocytochemical analyses by showing via live cell imaging analyses in primary neurons that LRP1 and APP are transported only partly in common (one third) but to a higher degree in distinct fast axonal transport vesicles...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28436125/the-quipp-app-a-safe-alternative-to-a-treat-all-strategy-for-threatened-preterm-labour
#7
Helena A Watson, Jenny Carter, Paul T Seed, Rachel M Tribe, Andrew H Shennan
OBJECTIVES: To evaluate the impact of a treat-all policy (advocated by NICE) compared to the QUIPP app (predictive model combining history of spontaneous preterm birth gestation and quantitative fetal fibronectin) for women in threatened preterm labour at <30 weeks gestation. METHODS: We conducted a subanalysis of prospectively collected data of pregnant women presenting with symptoms of preterm labour from the EQUIPP (REC Ref. 10/H0806/68) and PETRA (REC Ref...
April 24, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28432017/dual-functional-nanoparticles-for-precise-drug-delivery-to-alzheimer-s-disease-lesions-targeting-mechanisms-pharmacodynamics-and-safety
#8
Xiaoyao Zheng, Chi Zhang, Qian Guo, Xu Wan, Xiayan Shao, Qingfeng Liu, Qizhi Zhang
Alzheimer's disease (AD) is the most common form of dementia and is characterized by the cerebral accumulation of extracellular amyloid plaques. In a previous study, this histopathological hallmark was used as a target on a dual-functional nanoparticle (TQNP) to deliver biotechnological drugs, such as the H102 peptide, a β-sheet breaker, to AD lesions precisely. This delivery system could reduce the amyloid-β (Aβ) burden in the brains of AD model mice, as well as ameliorated the memory impairment of the mice...
April 18, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28411260/the-fast-ed-app-a-smartphone-platform-for-the-field-triage-of-patients-with-stroke
#9
Raul G Nogueira, Gisele S Silva, Fabricio O Lima, Yu-Chih Yeh, Carol Fleming, Daniel Branco, Arthur H Yancey, Jonathan J Ratcliff, Robert Keith Wages, Earnest Doss, Mehdi Bouslama, Jonathan A Grossberg, Diogo C Haussen, Teppei Sakano, Michael R Frankel
BACKGROUND AND PURPOSE: The Emergency Medical Services field triage to stroke centers has gained considerable complexity with the recent demonstration of clinical benefit of endovascular treatment for acute ischemic stroke. We sought to describe a new smartphone freeware application designed to assist Emergency Medical Services professionals with the field assessment and destination triage of patients with acute ischemic stroke. METHODS: Review of the application's platform and its development as well as the different variables, assessments, algorithms, and assumptions involved...
May 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28370697/-selecting-appraising-recommending-and-using-mobile-applications-apps-in-nursing
#10
EDITORIAL
Caleb Ferguson, Debra Jackson
It's more than likely that a patient, their family member or a colleague may have recently asked you "Is there an app for that?" Mobile technology is inescapable. It is pervasive in almost every aspect of daily life. Wherever we look, people are often hunched over and fully immersed by a small 6 x 3 inch screen, whether it be walking on the street, travelling on the bus, at the coffee shop or in the clinic waiting room. Mobile devices have infiltrated most aspects of our lives and offer quick, adaptive tech-based solutions to many previously administrative, repetitive or otherwise time-consuming tasks...
March 31, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/28328396/improved-medication-adherence-and-frequency-of-blood-glucose-self-testing-using-an-m-health-platform-versus-usual-care-in-a-multisite-randomized-clinical-trial-among-people-with-type-2-diabetes-in-india
#11
Nora J Kleinman, Avani Shah, Sanjiv Shah, Sanjeev Phatak, Vijay Viswanathan
BACKGROUND: In 2015, India had an estimated 69.2 million people with diabetes and a national prevalence of 8.7%. Evidence is mounting for the benefits of telemedicine in diabetes care, but remains limited on mobile-health (m-Health) interventions. INTRODUCTION: This study assessed the impact of an m-Health diabetes platform on clinical outcomes, patient-reported outcomes, patient and provider satisfaction, and app usage. MATERIALS AND METHODS: This open-label, two-arm parallel study enrolled 91 people at 3 sites in India, aged 18-65, with type 2 diabetes, and an A1c between 7...
March 6, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28314820/amyloid-precursor-protein-in-drosophila-glia-regulates-sleep-and-genes-involved-in-glutamate-recycling
#12
Abud Jose Farca Luna, Magali Perier, Laurent Seugnet
Amyloid precursor protein (App) plays a crucial role in Alzheimer's disease via the production and deposition of toxic β-amyloid peptides. App is heavily expressed in neurons, the focus of the vast majority of studies investigating its function. Meanwhile, almost nothing is known about App's function in glia, where it is also expressed, and can potentially participate in the regulation of neuronal physiology. In this report, we investigated whether Appl, the Drosophila homolog of App, could influence sleep-wake regulation when its function is manipulated in glial cells...
April 19, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28299779/the-related-neuronal-endosomal-proteins-neep21-nsg1-and-p19-nsg2-have-divergent-expression-profiles-in-vivo
#13
Kelly Barford, Chan Choo Yap, Noelle D Dwyer, Bettina Winckler
Endosomal maturation and transport constitutes a complex trafficking system present in all cell types. Neurons have adapted their endosomal system to meet their unique and complex needs. These adaptations include repurposing existing proteins to diversify endocytosis and trafficking, as well as preferential expression of certain regulators more highly in neurons than other cell types. These neuronal regulators include the family of Neuron-Specific Gene family members (Nsg), NEEP21 (Nsg1), and P19 (Nsg2). NEEP21/Nsg1 plays a role in the trafficking of multiple receptors, including the cell adhesion molecule L1/NgCAM, the neurotransmitter receptor GluA2, and β-APP...
June 1, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28298292/cellular-cholesterol-homeostasis-in-alzheimer-s-disease
#14
Ta Yuan Chang, Yoshio Yamauchi, Mazahir Hasan, Catherine Cy Chang
Alzheimer's disease [AD] is the most common form of dementia in older adults. Currently, there is no cure for AD. The hallmark of AD is the accumulation of extracellular amyloid plaques composed of amyloid beta peptides [Abeta; especially Abeta1-42], and neurofibrillary tangles, composed of hyper-phosphorylated tau, accompanied with chronic neuroinflammation. Abeta are derived from the amyloid precursor protein APP. The oligomeric form of Abeta is probably the most neurotoxic species; its accumulation eventually forms the insoluble and aggregated amyloid plaques...
March 15, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28282865/utilizing-crowdsourced-data-for-studies-of-cycling-and-air-pollution-exposure-a-case-study-using-strava-data
#15
Yeran Sun, Amin Mobasheri
With the development of information and communications technology, user-generated content and crowdsourced data are playing a large role in studies of transport and public health. Recently, Strava, a popular website and mobile app dedicated to tracking athletic activity (cycling and running), began offering a data service called Strava Metro, designed to help transportation researchers and urban planners to improve infrastructure for cyclists and pedestrians. Strava Metro data has the potential to promote studies of cycling and health by indicating where commuting and non-commuting cycling activities are at a large spatial scale (street level and intersection level)...
March 8, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28261150/intranasal-administration-of-the-antisecretory-peptide-af-16-reduces-edema-and-improves-cognitive-function-following-diffuse-traumatic-brain-injury-in-the-rat
#16
Fredrik Clausen, Hans-Arne Hansson, Johan Raud, Niklas Marklund
A synthetic peptide with antisecretory activity, antisecretory factor (AF)-16, improves injury-related deficits in water and ion transport and decreases intracranial pressure after experimental cold lesion injury and encephalitis although its role in traumatic brain injury (TBI) is unknown. AF-16 or an inactive reference peptide was administrated intranasally 30 min following midline fluid percussion injury (mFPI; n = 52), a model of diffuse mild-moderate TBI in rats. Sham-injured (n = 14) or naïve (n = 24) animals were used as controls...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28241068/liver-x-receptor-agonist-treatment-significantly-affects-phenotype-and-transcriptome-of-apoe3-and-apoe4-abca1-haplo-deficient-mice
#17
Alexis Y Carter, Florent Letronne, Nicholas F Fitz, Anais Mounier, Cody M Wolfe, Kyong Nyon Nam, Valerie L Reeves, Hafsa Kamboh, Iliya Lefterov, Radosveta Koldamova
ATP-binding cassette transporter A1 (ABCA1) controls cholesterol and phospholipid efflux to lipid-poor apolipoprotein E (APOE) and is transcriptionally controlled by Liver X receptors (LXRs) and Retinoic X Receptors (RXRs). In APP transgenic mice, lack of Abca1 increased Aβ deposition and cognitive deficits. Abca1 haplo-deficiency in mice expressing human APOE isoforms, increased level of Aβ oligomers and worsened memory deficits, preferentially in APOE4 mice. In contrast upregulation of Abca1 by LXR/RXR agonists significantly ameliorated pathological phenotype of those mice...
2017: PloS One
https://www.readbyqxmd.com/read/28197073/association-of-trka-and-app-is-promoted-by-ngf-and-reduced-by-cell-death-promoting-agents
#18
Nadia Canu, Ilaria Pagano, Luca Rosario La Rosa, Marsha Pellegrino, Maria Teresa Ciotti, Delio Mercanti, Fabiola Moretti, Valentina Sposato, Viviana Triaca, Carla Petrella, Ichiro N Maruyama, Andrea Levi, Pietro Calissano
The amyloid precursor protein (APP) interacts with the tropomyosin receptor kinase A (TrkA) in normal rat, mouse, and human brain tissue but not in Alzheimer's disease (AD) brain tissue. However, it has not been reported whether the two proteins interact directly, and if so, which domains are involved. Clarifying these points will increase our understanding of the role and regulation of the TrkA/APP interaction in normal brain functioning as well as in AD. Here we addressed these questions using bimolecular fluorescence complementation (BiFC) and the proximity ligation assay (PLA)...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28159908/regulation-of-synaptic-amyloid-%C3%AE-generation-through-bace1-retrograde-transport-in-a-mouse-model-of-alzheimer-s-disease
#19
Xuan Ye, Tuancheng Feng, Prasad Tammineni, Qing Chang, Yu Young Jeong, David J Margolis, Huaibin Cai, Alexander Kusnecov, Qian Cai
Amyloid-β (Aβ) peptides play a key role in synaptic damage and memory deficits in the early pathogenesis of Alzheimer's disease (AD). Abnormal accumulation of Aβ at nerve terminals leads to synaptic pathology and ultimately to neurodegeneration. β-site amyloid precursor protein (APP) cleaving enzyme 1 (BACE1) is the major neuronal β-secretase for Aβ generation. However, the mechanisms regulating BACE1 distribution in axons and β cleavage of APP at synapses remain largely unknown. Here, we reveal that dynein-Snapin-mediated retrograde transport regulates BACE1 trafficking in axons and APP processing at presynaptic terminals...
March 8, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28154138/pka-of-glu325-in-lacy
#20
Natalia Grytsyk, Junichi Sugihara, H Ronald Kaback, Petra Hellwig
Lactose permease (LacY), a paradigm for the largest family of membrane transport proteins, catalyzes the coupled translocation of a galactoside and a H(+) across the cytoplasmic membrane of Escherichia coli (galactoside/H(+) symport). One of the most important aspects of the mechanism is the relationship between protonation and binding of the cargo galactopyranoside. In this regard, it has been shown that protonation is required for binding. Furthermore when galactoside affinity is measured as a function of pH, an apparent pK (pK(app)) of ∼10...
February 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
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