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https://www.readbyqxmd.com/read/28088556/regulation-of-docetaxel-sensitivity-in-prostate-cancer-cells-by-hsa-mir-125a-3p-via-modulation-of-mta1-signaling
#1
Jian-Zhou Liu, Feng-Yan Yin, Chang-You Yan, Hui Wang, Xiao-Hui Luo
OBJECTIVE: To identify the potential down-stream targets of hsa-miR-125a-3p, a mature form of miR-125a, during the pathogenesis of chemoresistance in prostate cancer (PCa). METHODS: Expression levels of hsa-miR-125a-3p was assessed in chemoresistant PCa tissues and experimentally-established chemoresistant cells using quantitative RT-PCR (qRT-PCR). The effect of hsa-miR-125a-3p knockdown or hsa-miR-125a-3p overexpression on the Dox-induced cell death was evaluated using apoptosis ELISA in chemosensitive PC-3 cells or in chemoresistant PC-3 cells (PC-3R)...
January 11, 2017: Urology
https://www.readbyqxmd.com/read/28088544/off-site-impacts-of-wildfires-on-aquatic-systems-biomarker-responses-of-the-mosquitofish-gambusia-holbrooki
#2
Bruno Nunes, Vera Silva, Isabel Campos, Joana Luísa Pereira, Patrícia Pereira, Jan Jacob Keizer, Fernando Gonçalves, Nelson Abrantes
The number of wildfires has markedly increased in Mediterranean Europe, including in Portugal. Wildfires are environmentally concerning, not only due to the loss of biodiversity and forest area, but also as a consequence of environmental contamination by specific compounds including metals and polycyclic aromatic compounds (PAHs). These contaminants, mostly bound to ashes, can reach downstream water bodies, namely through surface runoff, being ultimately dispersed by vast areas and contacting with aquatic biota...
January 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28079139/blood-occludin-level-as-a-potential-biomarker-for-early-blood-brain-barrier-damage-following-ischemic-stroke
#3
Rong Pan, Kewei Yu, Theodore Weatherwax, Handong Zheng, Wenlan Liu, Ke Jian Liu
Concern about intracerebral hemorrhage (ICH) is the primary reason for withholding tPA therapy from patients with ischemic stroke. Early blood brain barrier (BBB) damage is the major risk factor for fatal post-thrombolysis ICH, but rapidly assessing BBB damage before tPA administration is highly challenging. We recently reported that ischemia induced rapid degradation of tight junction protein occludin in cerebromicrovessels. The present study investigates whether the cleaved occludin is released into the blood stream and how blood occludin levels correlate to the extent of BBB damage using a rat model of ischemic stroke...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28077709/semantic-congruence-accelerates-the-onset-of-the-neural-signals-of-successful-memory-encoding
#4
Pau A Packard, Antoni Rodríguez-Fornells, Nico Bunzeck, Berta Nicolás, Ruth de Diego-Balaguer, Lluís Fuentemilla
: As the stream of experience unfolds, our memory system rapidly transforms current inputs into long-lasting meaningful memories. A putative neural mechanism that strongly influences how input elements are transformed into meaningful memory codes relies on the ability to integrate them with existing structures of knowledge or schemas. However, it is not yet clear whether schema-related integration neural mechanisms occur during online encoding. In the current investigation, we examined the encoding-dependent nature of this phenomenon in humans...
January 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28077449/waterpipe-promotion-and-use-on-instagram-hookah
#5
Jon-Patrick Allem, Kar-Hai Chu, Tess Boley Cruz, Jennifer B Unger
INTRODUCTION: Waterpipe (hookah) use is becoming more prevalent in the United States and abroad with potential implications for public health. As waterpipe use rapidly grows in popularity, novel data streams are needed that can help capture and document the social and environmental context in which individuals use, and are marketed, this emerging tobacco product. This study characterized waterpipe-related posts on Instagram in order to inform regulatory and policy activities in the United States...
January 11, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28074962/crossed-flow-microfluidics-for-high-throughput-screening-of-bioactive-chemical-cell-interactions
#6
Ziqiu Tong, Angela Ivask, Keying Guo, Scott McCormick, Enzo Lombi, Craig Priest, Nicolas H Voelcker
This paper describes the use of crossed laminar flow microfluidics for the selective capture of multiple cell types on-chip aiming for high throughput screening of various cell treatment compounds. Parallel laminar streams containing different cell types were perfused and captured on a cell adhesion protein-functionalized reaction area. Thereafter, parallel streams containing cell treatment solutions were delivered orthogonally over the captured cells. Multiple cell types and a range of cell treatment conditions could therefore be assessed in a single experiment...
January 11, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28069770/recent-advances-in-high-capacity-free-space-optical-and-radio-frequency-communications-using-orbital-angular-momentum-multiplexing
#7
REVIEW
Alan E Willner, Yongxiong Ren, Guodong Xie, Yan Yan, Long Li, Zhe Zhao, Jian Wang, Moshe Tur, Andreas F Molisch, Solyman Ashrafi
There is a continuing growth in the demand for data bandwidth, and the multiplexing of multiple independent data streams has the potential to provide the needed data capacity. One technique uses the spatial domain of an electromagnetic (EM) wave, and space division multiplexing (SDM) has become increasingly important for increased transmission capacity and spectral efficiency of a communication system. A subset of SDM is mode division multiplexing (MDM), in which multiple orthogonal beams each on a different mode can be multiplexed...
February 28, 2017: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28069307/finding-clean-water-habitats-in-urban-landscapes-professional-researcher-vs-citizen-science-approaches
#8
Elaine McGoff, Francesca Dunn, Luis Moliner Cachazo, Penny Williams, Jeremy Biggs, Pascale Nicolet, Naomi C Ewald
This study investigated patterns of nutrient pollution in waterbody types across Greater London. Nitrate and phosphate data were collected by both citizen scientists and professional ecologists and their results were compared. The professional survey comprised 495 randomly selected pond, lake, river, stream and ditch sites. Citizen science survey sites were self-selected and comprised 76 ponds, lakes, rivers and streams. At each site, nutrient concentrations were assessed using field chemistry kits to measure nitrate-N and phosphate-P...
January 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28068416/growth-enhanced-transgenic-coho-salmon-oncorhynchus-kisutch-strains-have-varied-success-in-simulated-streams-implications-for-risk-assessment
#9
Rosalind A Leggatt, L Fredrik Sundström, Krista Woodward, Robert H Devlin
Growth hormone (GH) transgenic fish have accelerated growth and could improve production efficiency in aquaculture. However, concern exists regarding potential environmental risks of GH transgenic fish should they escape rearing facilities. While environmental effects have been examined in some GH transgenic models, there is a lack of information on whether effects differ among different constructs or strains of transgenic fish. We compared growth and survival of wild-type coho salmon (Oncorhynchus kisutch) fry, a fast-growing GH transgenic strain containing a metallothionein promoter (TMT), and three lines/strains containing a reportedly weaker histone-3 promoter (TH3) in hatchery conditions and semi-natural stream tanks with varying levels of natural food and predators...
2017: PloS One
https://www.readbyqxmd.com/read/28067777/a-fuzzy-based-approach-for-sensing-coding-and-transmission-configuration-of-visual-sensors-in-smart-city-applications
#10
Daniel G Costa, Mario Collotta, Giovanni Pau, Cristian Duran-Faundez
The advance of technologies in several areas has allowed the development of smart city applications, which can improve the way of life in modern cities. When employing visual sensors in that scenario, still images and video streams may be retrieved from monitored areas, potentially providing valuable data for many applications. Actually, visual sensor networks may need to be highly dynamic, reflecting the changing of parameters in smart cities. In this context, characteristics of visual sensors and conditions of the monitored environment, as well as the status of other concurrent monitoring systems, may affect how visual sensors collect, encode and transmit information...
January 5, 2017: Sensors
https://www.readbyqxmd.com/read/28067362/electrochemical-manipulation-of-cell-populations-supported-by-biodegradable-polymeric-nanosheets-for-cell-transplantation-therapy
#11
Jin Suzuki, Nobuhiro Nagai, Matsuhiko Nishizawa, Toshiaki Abe, Hirokazu Kaji
We describe an electrochemical method of harvesting cells cultured on a biodegradable polymeric nanosheet (cell/nanosheet construct), which is stabilized on a self-assembled monolayer (SAM) of thiol molecules. A poly(lactic-co-glycolic acid) (PLGA) nanosheet was attached by hydrophobic interactions onto the surface of a SAM of l-cysteine coated onto a gold electrode. Retinal pigment epithelial cell lines (RPE-J cells) were cultured on the nanosheet to form a monolayer. An AA-size dry battery was used to apply a negative electrical potential, causing reductive desorption of the SAM from the gold surface...
January 9, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28064094/influence-of-core-and-maltose-surface-modification-of-peis-on-their-interaction-with-plasma-proteins-human-serum-albumin-and-lysozyme
#12
Dominika Wrobel, Monika Marcinkowska, Anna Janaszewska, Dietmar Appelhans, Brigitte Voit, Barbara Klajnert-Maculewicz, Maria Bryszewska, Marcel Štofik, Regina Herma, Piotr Duchnowicz, Jan Maly
Regardless of the route of administration, some or all of a therapeutic agent will appear in the blood stream, where it can act on blood cells and other components of the plasma. Recently we have shown that poly(ethylene imines) (PEIs) which interact with plasma proteins are taken up into erythrocyte membranes. These observations led us to investigate the interactions between maltose functionalized hyperbranched PEIs (PEI-Mal) and plasma proteins. Two model proteins were chosen - human serum albumin (HSA) (albumins constitute ∼60% of all plasma proteins), and lysozyme...
January 2, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28063332/metabolomics-a-potential-way-to-know-the-role-of-vitamin-d-on-multiple-sclerosis
#13
REVIEW
Diego Luque-Córdoba, María D Luque de Castro
The literature about the influence of vitamin D on multiple sclerosis (MS) is very controversial, possibly as a result of the way through which the research on the subject has been conducted. The studies developed so far have been focused exclusively on gene expression: the effect of a given vitamin D metabolite on target receptors. The influence of the vitamin D status (either natural or after supplementation) on MS has been studied by measurement of the 25 monohydroxylated metabolite (also known as circulating form), despite the 1,25 dihydroxylated metabolite is considered the active form...
December 29, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28057681/ntcard-a-streaming-algorithm-for-cardinality-estimation-in-genomics-data
#14
Hamid Mohamadi, Hamza Khan, Inanc Birol
MOTIVATION: Many bioinformatics algorithms are designed for the analysis of sequences of some uniform length, conventionally referred to as k-mers. These include de Bruijn graph assembly methods and sequence alignment tools. An efficient algorithm to enumerate the number of unique k-mers, or even better, to build a histogram of k-mer frequencies would be desirable for these tools and their downstream analysis pipelines. Among other applications, estimated frequencies can be used to predict genome sizes, measure sequencing error rates, and tune runtime parameters for analysis tools...
January 5, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28057374/effects-of-potash-mining-on-river-ecosystems-an-experimental-study
#15
Miguel Cañedo-Argüelles, Sandra Brucet, Sergi Carrasco, Núria Flor-Arnau, Marc Ordeix, Sergio Ponsá, Eckhard Coring
In spite of being a widespread activity causing the salinization of rivers worldwide, the impact of potash mining on river ecosystems is poorly understood. Here we used a mesocosm approach to test the effects of a salt effluent coming from a potash mine on algal and aquatic invertebrate communities at different concentrations and release modes (i.e. press versus pulse releases). Algal biomass was higher in salt treatments than in control (i.e. river water), with an increase in salt-tolerant diatom species. Salt addition had an effect on invertebrate community composition that was mainly related with changes in the abundance of certain taxa...
January 2, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28057071/parasitic-infections-and-maternal-anaemia-among-expectant-mothers-in-the-dangme-east-district-of-ghana
#16
Samuel Crowther Kofi Tay, Emmanuel Agbeko Nani, Williams Walana
BACKGROUND: Parasitic infections are of public health concern globally, particular among at risk groups such as pregnant women in developing countries. The presence of these parasites during pregnancy potentiate adverse effects to both the mother and the unborn baby. This study sought to establish the prevalence of some parasitic agents among antenatal attendees in the Dangme East District of Ghana. A cross-sectional prospective study was conduct between April and July, 2012. Venous blood specimens were collected from each participant for haemoglobin estimation and malaria microscopy...
January 3, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28048051/su-f-t-210-the-variable-virtual-source-to-axis-distance-effect-on-a-compact-proton-pencil-beam-scanning-system
#17
J Zhang, X Li, X Ding
PURPOSE: We investigate the spot characteristic and dose profiles properties from a compact gantry proton therapy system. This compact design features a dedicated pencil beam scanning nozzle with the scanning magnet located upstream of the final 60 degree bending magnet. Due to the unique beam line design, uncertainty has been raised in the virtual source-to-axis distance (SAD). We investigate its potential clinical impact through measurements and simulation. METHODS: A scintillator camera based detector was used to measure spot characteristics and position accuracy...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047773/we-fg-bra-09-using-graphene-oxide-nano-flakes-during-image-guided-radiotherapy-to-minimize-the-potential-of-cancer-recurrence-or-metastasis
#18
D Toomeh, W Ngwa, E Sajo, Y Hao, S Gadoue
PURPOSE: An increasing number of studies show that cancer stem cells (CSCs) become more invasive (metastatic) and may escape into the blood stream and lymph nodes during radiotherapy (RT), before they have received a lethal dose during RT. Other Studies have shown that Graphene oxide (GO) can selectively inhibit the proliferative expansion of CSCs across multiplicative tumor types. In this study we investigate the feasibility of using GO during radiotherapy (RT) to minimize the escape of CSCs towards preventing cancer metastasis or recurrence...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047160/su-c-209-06-improving-x-ray-imaging-with-computer-vision-and-augmented-reality
#19
R D MacDougall, S Don, B Scherrer
PURPOSE: To determine the feasibility of using a computer vision algorithm and augmented reality interface to reduce repeat rates and improve consistency of image quality and patient exposure in general radiography. METHODS: A prototype device, designed for use with commercially available hardware (Microsoft Kinect 2.0) capable of depth sensing and high resolution/frame rate video, was mounted to the x-ray tube housing as part of a Philips DigitalDiagnost digital radiography room...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046897/we-h-brc-04-implement-lean-methodology-to-make-our-current-process-of-ct-simulation-to-treatment-more-efficient
#20
S Boddu, A Morrow, N Krishnamurthy, A McVicker, N Deb, D Rangaraj
PURPOSE: Our goal is to implement lean methodology to make our current process of CT simulation to treatment more efficient. METHODS: In this study, we implemented lean methodology and tools and employed flowchart in excel for process-mapping. We formed a group of physicians, physicists, dosimetrists, therapists and a clinical physics assistant and huddled bi-weekly to map current value streams. We performed GEMBA walks and observed current processes from scheduling patient CT Simulations to treatment plan approval...
June 2016: Medical Physics
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