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https://www.readbyqxmd.com/read/28231060/improving-quality-in-the-preanalytical-phase-through-innovation-on-behalf-of-the-european-federation-for-clinical-chemistry-and-laboratory-medicine-eflm-working-group-for-preanalytical-phase-wg-pre
#1
Giuseppe Lippi, Geoffrey S Baird, Giuseppe Banfi, Karin Bölenius, Janne Cadamuro, Stephen Church, Michael P Cornes, Anna Dacey, Antoine Guillon, Georg Hoffmann, Mads Nybo, Lakdasa Devananda Premawardhana, María Salinas, Sverre Sandberg, Robbert Slingerland, Ana Stankovic, Sylte Marit Sverresdotter, Pieter Vermeersch, Ana-Maria Simundic
It is now undeniable that laboratory testing is vital for the diagnosis, prognostication and therapeutic monitoring of human disease. Despite the many advances made for achieving a high degree of quality and safety in the analytical part of diagnostic testing, many hurdles in the total testing process remain, especially in the preanalytical phase ranging from test ordering to obtaining and managing the biological specimens. The Working Group for the Preanalytical Phase (WG-PRE) of the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM) has planned many activities aimed at mitigating the vulnerability of the preanalytical phase, including the organization of three European meetings in the past 7 years...
February 23, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28231036/aqueous-humor-penetration-and-biological-activity-of-moxifloxacin-0-5-ophthalmic-solution-alone-or-with-dexamethasone-0-1
#2
Rachel L R Gomes, Rodrigo Galvão Viana, Luiz Alberto S Melo, Alessandro Carvalho Cruz, Eunice Mayumi Suenaga, Kenneth R Kenyon, Mauro Campos
PURPOSE: To compare aqueous humor concentrations of topically applied moxifloxacin 0.5% ophthalmic solution alone or in combination with dexamethasone 0.1% and to correlate these concentrations with the minimum inhibitory concentrations (MICs) for common endophthalmitis-causing organisms. METHODS: Sixty-eight patients undergoing routine phacoemulsification with intraocular lens implantation received either moxifloxacin 0.5% alone or moxifloxacin 0.5% combined with dexamethasone...
March 2017: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28230927/crispr-cas9-technologies
#3
Bart O Williams, Matthew L Warman
The Clustered Regularly Interspaced Palindromic Repeats (CRISPR)/CRISPR-associated protein (Cas) pathway is revolutionizing biological research. Modifications to this primitive prokaryotic immune system now enable scientists to efficiently edit DNA or modulate gene expression in living eukaryotic cells and organisms. Thus, many laboratories can now perform important experiments that previously were considered scientifically risky or too costly. Here, we describe the components of the CRISPR/Cas system that have been engineered for use in eukaryotes...
February 23, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28230789/fungal-ribotoxins-a-review-of-potential-biotechnological-applications
#4
REVIEW
Miriam Olombrada, Rodrigo Lázaro-Gorines, Juan C López-Rodríguez, Álvaro Martínez-Del-Pozo, Mercedes Oñaderra, Moisés Maestro-López, Javier Lacadena, José G Gavilanes, Lucía García-Ortega
Fungi establish a complex network of biological interactions with other organisms in nature. In many cases, these involve the production of toxins for survival or colonization purposes. Among these toxins, ribotoxins stand out as promising candidates for their use in biotechnological applications. They constitute a group of highly specific extracellular ribonucleases that target a universally conserved sequence of RNA in the ribosome, the sarcin-ricin loop. The detailed molecular study of this family of toxic proteins over the past decades has highlighted their potential in applied research...
February 21, 2017: Toxins
https://www.readbyqxmd.com/read/28229948/mixing-and-capping-techniques-for-activated-carbon-based-sediment-remediation-efficiency-and-adverse-effects-for-lumbriculus-variegatus
#5
Sebastian Abel, Inna Nybom, Kimmo Mäenpää, Sarah E Hale, Gerard Cornelissen, Jarkko Akkanen
Activated carbon (AC) has been proven to be highly effective for the in-situ remediation of sediments contaminated with a wide range of hydrophobic organic contaminants (HOCs). However, adverse biological effects, especially to benthic organisms, can accompany this promising remediation potential. In this study, we compare both the remediation potential and the biological effects of several AC materials for two application methods: mixing with sediment (MIX) at doses of 0.1 and 1.0% based on sediment dw and thin layer capping (TLC) with 0...
February 16, 2017: Water Research
https://www.readbyqxmd.com/read/28229486/biomineralization-from-material-tactics-to-biological-strategy
#6
REVIEW
Shasha Yao, Biao Jin, Zhaoming Liu, Changyu Shao, Ruibo Zhao, Xiaoyu Wang, Ruikang Tang
Biomineralization is an important tactic by which biological organisms produce hierarchically structured minerals with marvellous functions. Biomineralization studies typically focus on the mediation function of organic matrices on inorganic minerals, which helps scientists to design and synthesize bioinspired functional materials. However, the presence of inorganic minerals may also alter the native behaviours of organic matrices and even biological organisms. This progress report discusses the latest achievements relating to biomineralization mechanisms, the manufacturing of biomimetic materials and relevant applications in biological and biomedical fields...
February 23, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28229462/harmonization-of-nucleic-acid-testing-for-zika-virus-development-of-the-1-st-world-health-organization-international-standard
#7
Sally A Baylis, Kay-Martin O Hanschmann, Barbara S Schnierle, Jan-Hendrik Trösemeier, Johannes Blümel
BACKGROUND: With the ongoing public health emergency due to Zika virus (ZIKV), nucleic acid testing (NAT) is essential for clinical diagnosis and screening of blood donors. However, NAT for ZIKV has not been standardized, and this study was performed to establish a World Health Organization (WHO) International Standard (IS) for ZIKV RNA; WHO ISs have been used to improve detection and quantification of blood-borne viruses. STUDY DESIGN AND METHODS: The candidate IS (cIS), code number 11468/16, was prepared by heat inactivation and lyophilization of a ZIKV strain isolated from a patient in French Polynesia in 2013...
February 23, 2017: Transfusion
https://www.readbyqxmd.com/read/28229194/screening-level-assessment-of-metal-concentrations-in-streambed-sediments-and-floodplain-soils-within-the-grand-lake-watershed-in-northeastern-oklahoma-usa
#8
Ean M Garvin, Cas F Bridge, Meredith S Garvin
Metal releases have been received by the Grand Lake watershed from the Tri-State Mining District (TSMD) since the mid 1800s. To address data gaps in metal distributions in the Oklahoma portion of the watershed, streambed sediment and floodplain soil was sampled on various streams. The <63-µm fraction was analyzed for Cd, Pb, and Zn concentrations by portable X-ray fluorescence spectroscopy and inductively coupled plasma-mass spectrometry. Mean metal concentration results at reference transects indicated that background sediment/soil concentrations for Cd, Pb, and Zn within the watershed were 0...
February 22, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28228927/computational-approaches-for-revealing-the-structure-of-membrane-transporters-case-study-on-bilitranslocase
#9
REVIEW
Katja Venko, A Roy Choudhury, Marjana Novič
The structural and functional details of transmembrane proteins are vastly underexplored, mostly due to experimental difficulties regarding their solubility and stability. Currently, the majority of transmembrane protein structures are still unknown and this present a huge experimental and computational challenge. Nowadays, thanks to X-ray crystallography or NMR spectroscopy over 3000 structures of membrane proteins have been solved, among them only a few hundred unique ones. Due to the vast biological and pharmaceutical interest in the elucidation of the structure and the functional mechanisms of transmembrane proteins, several computational methods have been developed to overcome the experimental gap...
2017: Computational and Structural Biotechnology Journal
https://www.readbyqxmd.com/read/28228608/untapped-endophytic-colonization-and-plant-growth-promoting-potential-of-the-genus-novosphingobium-to-optimize-rice-cultivation
#10
Chakrapong Rangjaroen, Rungroch Sungthong, Benjavan Rerkasem, Neung Teaumroong, Rujirek Noisangiam, Saisamorn Lumyong
With the aim of searching for potent diazotrophic bacteria that are free of public health concerns and optimize rice cultivation, the endophytic colonization and plant growth-promoting activities of some endophytic diazotrophic bacteria isolated from rice were evaluated. Among these bacteria, the emerging diazotrophic strains of the genus Novosphingobium effectively associated with rice plant interiors and consequently promoted the growth of rice, even with the lack of a nitrogen source. These results suggest that diazotrophic Novosphingobium is an alternative microbial resource for further development as a safe biological enhancer in the optimization of organic rice cultivation...
February 21, 2017: Microbes and Environments
https://www.readbyqxmd.com/read/28228543/characterization-of-dependencies-between-growth-and-division-in-budding-yeast
#11
Michael B Mayhew, Edwin S Iversen, Alexander J Hartemink
Cell growth and division are processes vital to the proliferation and development of life. Coordination between these two processes has been recognized for decades in a variety of organisms. In the budding yeast Saccharomyces cerevisiae, this coordination or 'size control' appears as an inverse correlation between cell size and the rate of cell-cycle progression, routinely observed in G1 prior to cell division commitment. Beyond this point, cells are presumed to complete S/G2/M at similar rates and in a size-independent manner...
February 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28228481/a-helical-bundle-in-the-n-terminal-domain-of-the-blm-helicase-mediates-dimer-and-potentially-hexamer-formation
#12
Jing Shi, Wei-Fei Chen, Bo Zhang, San-Hong Fan, Xia Ai, Na-Nv Liu, Stephane Rety, Xu-Guang Xi
Helicases play a critical role in processes such as replication or recombination by unwinding double-stranded DNA; mutations of these genes can therefore have devastating biological consequences. In human, mutations in genes of three members of the RecQ family helicases (blm, wrn and recq4) give rise to three strikingly distinctive clinical phenotypes: Bloom syndrome, Werner syndrome and Rothmund-Thomson syndrome, respectively. However, the molecular basis for these varying phenotypic outcomes is unclear, in part because a full mechanistic description of helicase activity is lacking...
February 22, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28228075/challenges-in-dermal-delivery-of-therapeutic-antimicrobial-protein-and-peptides
#13
Rohan Aminbhai Lalani, Ambikanandan Misra, Jitendra Amrutiya, Hinal Patel, Priyanka Bhatt, Vivek Patel
BACKGROUND: Protein and peptides in biological system form an important part of innate immune system and are being explored for potential use in various diseases as therapeutics. Importance of proteins and peptides as a new class of antimicrobial agents have boosted research in the field of biotechnology as potential alternative to antibiotic agents. OBJECTIVE: Protein and peptides antimicrobial as a therapeutics class are structurally diverse and exhibit potent activity against microbes by various mechanisms...
February 22, 2017: Current Drug Metabolism
https://www.readbyqxmd.com/read/28228010/selective-fusion-of-heterogeneous-classifiers-for-predicting-substrates-of-membrane-transporters
#14
Naeem Shaikh, Mahesh Sharma, Prabha Garg
Membrane transporters play a crucial role in determining fate of administered drugs in a biological system. Early identification of plausible transporters for a drug molecule can provide insights into its therapeutic, pharmacokinetic and toxicological profile. In the present study, predictive models for classifying small molecules into substrates and non-substrates of various pharmaceutically important membrane transporters are developed using QSAR and proteochemometric (PCM) approaches. For this purpose, 4575 substrate interactions for these transporters were collected from Metabolism and Transport Database (Metrabase) and literature...
February 23, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28227910/development-of-a-three-dimensional-lattice-free-multiscale-model-of-the-mammary-terminal-end-bud
#15
Joseph D Butner, Vittorio Cristini, Zhihui Wang, Joseph D Butner, Vittorio Cristini, Zhihui Wang, Vittorio Cristini, Joseph D Butner, Zhihui Wang
The terminal end bud (TEB) is a bulbous structure composed of highly proliferative cells that is responsible for mammary gland development during the pubertal stage. This is a highly organized process, involving cellular differentiation hierarchies regulated by endocrine and paracrine signaling. Here, we present development of a lattice-free, three dimensional multiscale agent based model of the TEB to study the effects of cellular phenotypic hierarchies, endocrine and paracrine signaling, and proliferation demographics on pubertal mammary gland development...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227867/knife-edge-scanning-microscopy-for-in-silico-study-of-cerebral-blood-flow-from-biological-imaging-data-to-flow-simulations
#16
Michael R Nowak, Alexander Lozovskiy, Dimitri Dobroskok, Yoonsuck Choe, Michael R Nowak, Alexander Lozovskiy, Dimitri Dobroskok, Yoonsuck Choe, Dimitri Dobroskok, Michael R Nowak, Alexander Lozovskiy, Yoonsuck Choe
Knife-edge scanning microscopy provides the capability to image whole-brain cerebral microvasculature of small organisms, such as mice, at sub-micron resolution, providing a feasible foundation for the reconstruction of circulatory pathways from the systemic to cellular scale. In this paper, we illustrate the feasibility of using this data to model cerebral blood flow using numerical simulations. Starting with a small vascular element in microcirculation of interest, we present its segmentation from the imaging-data volume, construction of its triangular surface mesh, assembly of its tetrahedral volumetric mesh from the surface, and then conclude with Stokes flow simulation of plasma through the microvascular vessel...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227853/fast-submicrometer-scale-imaging-of-whole-zebrafish-using-the-knife-edge-scanning-microscope
#17
Daniel E Miller, Raj S Shah, Wencong Zhang, Jaewook Yoo, Jaerock Kwon, David Mayerich, John Keyser, Louise C Abbott, Yoonsuck Choe, Daniel E Miller, Raj S Shah, Wencong Zhang, Jaewook Yoo, Jaerock Kwon, David Mayerich, John Keyser, Louise C Abbott, Yoonsuck Choe, Jaewook Yoo, Louise C Abbott, Wencong Zhang, John Keyser, Raj S Shah, Daniel E Miller, Jaerock Kwon, David Mayerich, Yoonsuck Choe
Advances in high-resolution 3D microscopy have enabled the investigation of subcellular microstructures in biological specimen. For a full understanding of the organism's structure and function, it is mandatory to obtain data from the whole animal, not just parts of it. In this paper, we present our work with the Knife-Edge Scanning Microscope (KESM) for imaging a Nissl-stained whole zebrafish larva. KESM combines a diamond microtome and line-scan imaging for simultaneous sectioning and imaging in 3D. We show that using the KESM, a zebrafish, less than 3 mm long and diameter less than 500 μm, can be imaged within 1 hour at a resolution of 0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227815/lab-on-chips-for-manipulation-of-small-scale-organisms-to-facilitate-imaging-of-neurons-and-organs
#18
Ramtin Ardeshiri, Pouya Rezai, Ramtin Ardeshiri, Pouya Rezai, Ramtin Ardeshiri, Pouya Rezai
Caenorhabditis elegans (C. elegans) and Drosophila melanogaster (D. melanogaster) are widely-used model organisms for neurological and cardiac studies due to their simple neuronal (302 neurons in C. elegans) and cardiac (simple tubular organ in D. melanogaster) systems. However, their small sizes and continuous mobility impede their precise and timely manipulation, hence, limiting the assays that can be done using conventional manual methods. This has resulted in a need for technologies that allow multidirectional manipulation of model organisms to enable studies on target neurons and organs throughout the body...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226696/divergence-map-from-diffusion-tensor-imaging-concepts-and-application-to-corpus-callosum
#19
Gustavo R Pinheiro, Guilherme S Soares, Andre Luis Costa, Roberto A Lotufo, Leticia Rittner, Gustavo R Pinheiro, Guilherme S Soares, Andre Luis Costa, Roberto A Lotufo, Leticia Rittner, Leticia Rittner, Gustavo R Pinheiro, Roberto A Lotufo, Andre Luis Costa, Guilherme S Soares
This work proposes a novel approach to the analysis of Diffusion Tensor Imaging (DTI) by applying the mathematical concept of divergence, used in vector analysis. This is achieved by choosing an arbitrary direction of analysis and using this direction to transform the diffusion tensor field into an oriented vector field. The method was inspired by the idea of imposing a liquid flow inside the biological tissues, oriented in the direction of analysis, and watching the direction it would be expected to take as it flows through the paths created by the fibers...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226291/cell-free-synthetic-biology-for-environmental-sensing-and-remediation
#20
REVIEW
David K Karig
The fields of biosensing and bioremediation leverage the phenomenal array of sensing and metabolic capabilities offered by natural microbes. Synthetic biology provides tools for transforming these fields through complex integration of natural and novel biological components to achieve sophisticated sensing, regulation, and metabolic function. However, the majority of synthetic biology efforts are conducted in living cells, and concerns over releasing genetically modified organisms constitute a key barrier to environmental applications...
February 19, 2017: Current Opinion in Biotechnology
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