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https://www.readbyqxmd.com/read/28222503/selenium-levels-in-serum-red-blood-cells-and-cerebrospinal-fluid-of-alzheimer-s-disease-patients-a-report-from-the-australian-imaging-biomarker-lifestyle-flagship-study-of-ageing-aibl
#1
Bárbara R Cardoso, Dominic J Hare, Ashley I Bush, Qiao-Xin Li, Christopher J Fowler, Colin L Masters, Ralph N Martins, Katherine Ganio, Amber Lothian, Soumya Mukherjee, Eugene A Kapp, Blaine R Roberts
Selenium (Se) protects cells against oxidative stress damage through a range of bioactive selenoproteins. Increased oxidative stress is a prominent feature of Alzheimer's disease (AD), and previous studies have shown that Se deficiency is associated with age-related cognitive decline. In this study, we assessed Se status in different biofluids from a subgroup of participants in the Australian Imaging, Biomarkers and Lifestyle Flagship Study of Ageing. As Se in humans can either be an active component of selenoproteins or inactive via non-specific incorporation into other proteins, we used both size exclusion chromatography-inductively coupled plasma-mass spectrometry (SEC-ICP-MS) and tandem mass spectrometry to characterize selenoproteins in serum...
February 10, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28222499/prediction-of-the-level-and-duration-of-shear-stress-exposure-that-induces-subhemolytic-damage-to-erythrocytes
#2
Michael J Simmonds, Herbert J Meiselman
BACKGROUND: Current generation mechanical circulatory assist devices are designed to minimize high shears to blood for prolonged durations to avoid hemolysis. However, red blood cells (RBC) demonstrate impaired capacity to deform when exposed to shear stress (SS) well below the "hemolytic threshold". OBJECTIVE: We endeavored to identify how changes in the magnitude and duration of SS exposure alter RBC deformability and subsequently develop a model to predict erythrocyte subhemolytic damage...
February 9, 2017: Biorheology
https://www.readbyqxmd.com/read/28222387/baicalein-enhances-the-osteogenic-differentiation-of-human-periodontal-ligament-cells-by-activating-the-wnt-%C3%AE-catenin-signaling-pathway
#3
Li-Jiao Chen, Bi-Bo Hu, Xin-Lian Shi, Man-Man Ren, Wen-Bin Yu, Sheng-Dan Cen, Rong-Dang Hu, Hui Deng
OBJECTIVE: Periodontium regeneration is one of the most important processes for periodontitis therapy. Human periodontal ligament cells (hPDLCs) play a vital role in the repair and regeneration of periodontal tissues. Our study aimed to investigated the mechanisms underlying the promotion of hPLDCs osteogenic differentiation by baicalein. DESIGN: hPDLCs were obtained from periodontal ligament (PDL) tissues by primary culture. The MTT assay was used to determine the growth curves of hPDLCs treated with different concentrations of baicalein (1...
February 7, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28222378/fetal-hemoglobin-is-much-less-prone-to-dna-cleavage-compared-to-the-adult-protein
#4
Sandeep Chakane, Tiago Matos, Karin Kettisen, Leif Bulow
Hemoglobin (Hb) is well protected inside the red blood cells (RBCs). Upon hemolysis and when free in circulation, Hb can be involved in a range of radical generating reactions and may thereby attack several different biomolecules. In this study, we have examined the potential damaging effects of cell-free Hb on plasmid DNA (pDNA). Hb induced cleavage of supercoiled pDNA (sc pDNA) which was proportional to the concentration of Hb applied. Almost 70% of sc pDNA was converted to open circular or linear DNA using 10µM of Hb in 12h...
February 12, 2017: Redox Biology
https://www.readbyqxmd.com/read/28222303/organic-dye-removal-from-aqueous-solutions-by-hierarchical-calcined-ni-fe-layered-double-hydroxide-isotherm-kinetic-and-mechanism-studies
#5
Chunsheng Lei, Meng Pi, Panyong Kuang, Yingqing Guo, Fenge Zhang
Hierarchically porous nickel-iron-layered double hydroxide (NiFe-LDH) with a Ni(2+)/Fe(3+) molar ratio of 3 was successfully synthesised through a simple hydrothermal route. After calcination at 400°C, NiFe-LDH transformed into nickel-iron-layered double oxides (NiFe-LDO). The as-prepared samples were characterised through X-ray powder diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and nitrogen adsorption...
February 14, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28222237/extreme-genetic-structure-in-a-social-bird-species-despite-high-dispersal-capacity
#6
Francisco Morinha, José A Dávila, Estela Bastos, João A Cabral, Óscar Frías, José L González, Paulo Travassos, Diogo Carvalho, Borja Milá, Guillermo Blanco
Social barriers have been shown to reduce gene flow and contribute to genetic structure among populations in species with high cognitive capacity and complex societies, such as cetaceans, apes and humans. In birds, high dispersal capacity is thought to prevent population divergence unless major geographic or habitat barriers induce isolation patterns by dispersal, colonization or adaptation limitation. We report that Iberian populations of the red-billed chough, a social, gregarious corvid with high dispersal capacity, show a striking degree of genetic structure composed of at least 15 distinct genetic units...
February 21, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28222204/comparative-transcriptome-and-potential-antiviral-signaling-pathways-analysis-of-the-gills-in-the-red-swamp-crayfish-procambarus-clarkii-infected-with-white-spot-syndrome-virus-wssv
#7
Zhi-Qiang Du, Yan-Hui Jin
Red swamp crayfish is an important model organism for research of the invertebrate innate immunity mechanism. Its excellent disease resistance against bacteria, fungi, and viruses is well-known. However, the antiviral mechanisms of crayfish remain unclear. In this study, we obtained high-quality sequence reads from normal and white spot syndrome virus (WSSV)-challenged crayfish gills. For group normal (GN), 39,390,280 high-quality clean reads were randomly assembled to produce 172,591 contigs; whereas, 34,011,488 high-quality clean reads were randomly assembled to produce 182,176 contigs for group WSSV-challenged (GW)...
February 20, 2017: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/28222009/alzheimer-s-and-danish-dementia-peptides-induce-cataract-and-perturb-retinal-architecture-in-rats
#8
G Bhanuprakash Reddy, P Yadagiri Reddy, Avadhesha Surolia
Familial Danish dementias (FDDs) are autosomal dominant neurodegenerative disorders that are associated with visual defects. In some aspects, FDD is similar to Alzheimer's disease (AD)- the amyloid deposits in FDD and AD are made of short peptides: amyloid β (Aβ) in AD and ADan in FDD. Previously, we demonstrated an interaction between the dementia peptides and α-crystallin leading to lens opacification in organ culture due to impaired chaperone activity of α-crystallin. Herein, we report the in vivo effects of ADan and Aβ on the eye...
February 21, 2017: Biomolecular Concepts
https://www.readbyqxmd.com/read/28221804/semiconductor-seeded-nanorods-with-graded-composition-exhibiting-high-quantum-yield-high-polarization-and-minimal-blinking
#9
Ido Hadar, John Patrick Philbin, Yossef Efraim Panfil, Shany Neyshtadt, Itai Lieberman, Hagai Eshet, Sorin Lazar, Eran Rabani, Uri Banin
Seeded semiconductor nanorods represent a unique family of quantum confined materials that manifest characteristics of mixed dimensionality. They show polarized emission with high quantum yield and fluorescence switching under an electric field, features that are desirable for use in display technologies and other optical applications. So far, their robust synthesis has been limited mainly to CdSe/CdS heterostructures, thereby constraining the spectral tunability to the red region of the visible spectrum. Herein we present a novel synthesis of CdSe/Cd1-xZnxS seeded nanorods with radially graded composition that show bright and highly polarized green emission with minimal intermittency, as confirmed by ensemble and single nanorods optical measurements...
February 21, 2017: Nano Letters
https://www.readbyqxmd.com/read/28221795/strongly-phosphorescent-transition-metal-%C3%AF-complexes-of-boron-boron-triple-bonds
#10
Holger Braunschweig, Theresa Dellermann, Rian D Dewhurst, Benjamin Hupp, Thomas Kramer, James D Mattock, Jan Mies, Ashwini K Phukan, Andreas Steffen, Alfredo Vargas
Herein are reported the first complexes of compounds with boron-boron triple bonds to transition metals, in this case CuI. Three different compounds were isolated that differ in the number of copper atoms bound to the BB unit. Metallation of the B-B triple bonds causes lengthening of the B-B and B-CNHC bonds, as well as large upfield shifts of the 11B NMR signals, suggesting greater orbital interactions between the boron and transition metal atoms than those observed with recently published diboryne / alkali metal cation complexes...
February 21, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28221674/effects-of-visitor-numbers-on-captive-european-red-squirrels-sciurus-vulgaris-and-impacts-on-visitor-experience
#11
Eleanor E Woolway, Anne E Goodenough
Visitors to zoological collections can have substantial effects on captive animals that vary according to species, enclosure design, visitor proximity, and husbandry methods. One particularly intense form of visitor interaction occurs in immersive exhibits such as walk-through enclosures. Such enclosures are increasingly common but effects on animal behavior are currently understudied. Here, the behavior of captive European red squirrels (Sciurus vulgaris) is studied in relation to visitor numbers in a walk-through enclosure...
February 21, 2017: Zoo Biology
https://www.readbyqxmd.com/read/28221377/the-nonmonotonous-shift-of-quantum-plasmon-resonance-and-plasmon-enhanced-photocatalytic-activity-of-gold-nanoparticles
#12
Si-Jing Ding, Da-Jie Yang, Jin-Ling Li, Gui-Ming Pan, Liang Ma, Yong-Jie Lin, Jia-Hong Wang, Li Zhou, Min Feng, Hongxing Xu, Shiwu Gao, Qu-Quan Wang
The surface plasmon resonance (SPR) of metal nanoparticles exhibits quantum behaviors as the size decreases owing to the transitions of quantized conduction electrons, but most studies are limited to the monotonous SPR blue-shift caused by off-resonant transitions. Here, we demonstrate the nonmonotonous SPR red-shift caused by resonant electron transitions and photocatalytic activity enhanced by the quantum plasmon resonance of colloidal gold nanoparticles. A maximal SPR wavelength and the largest photocatalytic activity are observed in the quantum regime for the first time for the gold nanoparticles with a diameter of 3...
February 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/28221362/disrupted-iron-regulation-in-the-brain-and-periphery-in-cocaine-addiction
#13
K D Ersche, J Acosta-Cabronero, P S Jones, H Ziauddeen, R P L van Swelm, C M M Laarakkers, R Raha-Chowdhury, G B Williams
Stimulant drugs acutely increase dopamine neurotransmission in the brain, and chronic use leads to neuroadaptive changes in the mesolimbic dopamine system and morphological changes in basal ganglia structures. Little is known about the mechanisms underlying these changes but preclinical evidence suggests that iron, a coenzyme in dopamine synthesis and storage, may be a candidate mediator. Iron is present in high concentrations in the basal ganglia and stimulant drugs may interfere with iron homeostasis. We hypothesised that morphological brain changes in cocaine addiction relate to abnormal iron regulation in the brain and periphery...
February 21, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28221242/disseminated-intravascular-coagulation-in-emergency-department-patients-with-primary-postpartum-hemorrhage
#14
Chang Hwan Sohn, So Ra Kim, Youn-Jung Kim, Dong Woo Seo, Shin Ahn, Yoon-Seon Lee, Jae Ho Lee, Bum Jin Oh, Hye-Sung Won, Jae-Yoon Shim, Kyoung-Soo Lim, Won Young Kim
The aim of this study was to evaluate the prevalence of disseminated intravascular coagulation and to determine whether the presence of disseminated intravascular coagulation is associated with major adverse events in patients with primary postpartum hemorrhage who present to the emergency department.This retrospective case-control study was conducted in the emergency department of a university-affiliated, tertiary referral center between January 1, 2004 and December 31, 2013. Patients were classified into disseminated intravascular coagulation (disseminated intravascular coagulation score ≥ 5) and non-disseminated intravascular coagulation groups...
February 17, 2017: Shock
https://www.readbyqxmd.com/read/28221198/red-cell-transfusion-associated-hemolysis-in-cardiac-surgery-an-observational-cohort-study
#15
Keyvan Karkouti, Jeannie L Callum, Jason P Acker, Paul Yip, Vivek Rao
BACKGROUND: Red cell viability is impaired during storage, resulting in excess hemolysis during storage and after transfusion. As a result, transfusions may oversaturate the hemoglobin clearance pathways, resulting in cell-free hemoglobin and iron toxicity in susceptible patients, such as those undergoing cardiac surgery with cardiopulmonary bypass. To explore this hypothesis, we assessed the relationship of red cell transfusions with cell-free hemoglobin and transferrin saturation levels in a consecutive cohort of cardiac surgical patients...
February 17, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28221029/highly-efficient-and-thermally-stable-k3alf6-mn4-as-a-red-phosphor-for-ultra-high-performance-warm-white-leds
#16
Enhai Song, Jianqing Wang, Jiahao Shi, Tingting Deng, Shi Ye, Mingying Peng, Jing Wang, Lothar Wondraczek, Qinyuan Zhang
Following pioneering work, solution-processable Mn4+-activated fluoride pigments, such as A2BF6 (A = Na, K, Rb, Cs; A2 = Ba, Zn; B = Si, Ge, Ti, Zr, Sn), have attracted considerable attention as highly promising red phosphors for warm white light emitting diodes (W-LEDs). To date, these fluoride pigments have been synthesized via traditional chemical routes with HF-solution. However, in addition to the possible dangers of hypertoxic HF, the uncontrolled precipitation of fluorides and the extensive processing steps produce large morphological variations, resulting in a wide variation in the LED performance of the resulting devices, which hampers their prospects for practical applications...
February 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28221001/synthesis-of-dual-stimuli-responsive-microcontainers-with-two-payloads-in-different-storage-spaces-for-preprogrammable-release
#17
Ying Cong, Qiuju Li, Min Chen, Limin Wu
Stimuli-responsive microcontainers have become a major topic of interest, from fundamental aspects to applications in materials science. However, microcontainers that enable the loading of multiple species and programmable release are mostly unexplored. Herein, we describe the design and synthesis of a dual-responsive organic/inorganic hybrid microcontainer with two payloads in separate storage spaces that is formed by the rapid UV-initiated polymerization of Pickering emulsions. The stellate mesopore silica nanoparticles with poly(N-isopropylacrylamide) grafted inside the mesopores were loaded with one compound (Nile red) and used as Pickering emulsifiers to stabilize oil-in-water droplets...
February 21, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28220946/light-and-energy-based-therapeutics-for-genitourinary-syndrome-of-menopause-consensus-and-controversies
#18
Yona Tadir, Adrian Gaspar, Ahinoam Lev-Sagie, Macrene Alexiades, Red Alinsod, Alex Bader, Alberto Calligaro, Jorge A Elias, Marco Gambaciani, Jorge E Graviria, Cheryl B Iglesia, Ksenija Selih-Martinec, Patricia L Mwesigwa, Urska B Ogrinc, Stefano Salvatore, Paolo Scollo, Nicola Zerbinati, John Stuart Nelson
Gynecologist and plastic surgeons pioneered the application of lasers in medicine and surgery almost 5 decades ago, initially used to treat cervical and vaginal pathologies. Ever since, energy-based devices have been deployed to treat pelvic pathologies and improve fertility. Recent technological developments triggered an unprecedented wave of publications, assessing the efficacy of fractional laser, and radiofrequency on the vaginal wall in reversing natural aging processes. Studies have shown that a certain degree of thermal energy deposited on the vaginal wall stimulates proliferation of the glycogen-enriched epithelium, neovascularization, and collagen formation in the lamina propria, and improves natural lubrication and control of urination...
February 21, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28220641/safety-review-of-transcranial-direct-current-stimulation-in-stroke
#19
REVIEW
Cristina Russo, Maíra I Souza Carneiro, Nadia Bolognini, Felipe Fregni
OBJECTIVES: The safety, painless, and tolerability features of transcranial Direct Current Stimulation (tDCS) have prompted the research on the therapeutic effects of this technique in stroke; however, an in-depth and unarguable examination of the adverse effects of tDCS in stroke patients is still lacking. This review analyzes the reported adverse effects in stroke, looking for factors that may induce side-effects. MATERIALS AND METHODS: A comprehensive search of articles published from 1998 to 2015 describing tDCS application in stroke patients performed through data extraction from MEDLINE/PubMed database...
February 21, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28220561/genetic-trends-for-fertility-udder-health-and-protein-yield-in-swedish-red-cattle-estimated-with-different-models
#20
S Eriksson, K Johansson, H Hansen Axelsson, W F Fikse
The aim of this study was to estimate and compare genetic trends in Swedish Red cattle using a full multiple-trait (MT) model and trait-group-wise models for female fertility, udder health and protein yield. Field data for maiden heifers from 1989 and cows with a first and second lactation between 1990 and 2007 were included. (Co)variance components were estimated prior to prediction of breeding values. The estimated genetic trends were clearly favourable for protein yield and udder conformation, and in most cases neutral to favourable for clinical mastitis and calving to first insemination...
February 20, 2017: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
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