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https://www.readbyqxmd.com/read/28732311/solid-and-aqueous-magnetoliposomes-as-nanocarriers-for-a-new-potential-drug-active-against-breast-cancer
#1
Ana Rita O Rodrigues, Pedro M F Mendes, Pedro M L Silva, V A Machado, Bernardo G Almeida, J P Araújo, Maria-João R P Queiroz, Elisabete M S Castanheira, Paulo J G Coutinho
Iron oxide nanoparticles, with diameters around 12nm, were synthesized by coprecipitation method. The magnetic properties indicate a superparamagnetic behavior with a coercive field of 9.7Oe and a blocking temperature of 118K. Both aqueous and solid magnetoliposomes containing magnetite nanoparticles have sizes below 150nm, suitable for biomedical applications. Interaction between both types of magnetoliposomes and models of biological membranes was proven. A new antitumor compound, a diarylurea derivative of thienopyridine, active against breast cancer, was incorporated in both aqueous and solid magnetoliposomes, being mainly located in the lipid membrane...
July 8, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28725879/using-closure-tables-to-enable-cross-querying-of-ontologies-in-database-driven-applications
#2
Daniel R Harris, Darren W Henderson, Jeffery C Talbert
We demonstrate that closure tables are an effective data structure for developing database-driven applications that query biomedical ontologies and that require cross-querying between multiple ontologies. A closure table stores all available paths within a tree, even those without a direct parent-child relationship; additionally, a node can have multiple ancestors which gives the foundation for supporting linkages between controlled ontologies. We augment the meta-data structure of the ICD9 and ICD10 ontologies included in i2b2, an open source query tool for identifying patient cohorts, to utilize a closure table...
February 2017: IEEE-EMBS International Conference on Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28723948/integrative-functional-analyses-using-rainbow-trout-selected-for-tolerance-to-plant-diets-reveal-nutrigenomic-signatures-for-soy-utilization-without-the-concurrence-of-enteritis
#3
Jason Abernathy, Andreas Brezas, Kevin R Snekvik, Ronald W Hardy, Ken Overturf
Finding suitable alternative protein sources for diets of carnivorous fish species remains a major concern for sustainable aquaculture. Through genetic selection, we created a strain of rainbow trout that outperforms parental lines in utilizing an all-plant protein diet and does not develop enteritis in the distal intestine, as is typical with salmonids on long-term plant protein-based feeds. By incorporating this strain into functional analyses, we set out to determine which genes are critical to plant protein utilization in the absence of gut inflammation...
2017: PloS One
https://www.readbyqxmd.com/read/28723197/in-vivo-biosensing-progress-and-perspectives
#4
Guoxin Rong, Simon R Corrie, Heather A Clark
In vivo biosensors are emerging as powerful tools in biomedical research and diagnostic medicine. Distinct from "labels" or "imaging", in vivo biosensors are designed for continuous and long-term monitoring of target analytes in real biological systems and should be selective, sensitive, reversible and biocompatible. Due to the challenges associated with meeting all of the analytical requirements, we found relatively few reports of research groups demonstrating devices that meet the strict definition in vivo...
March 24, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28720456/mechanistic-mathematical-models-an-underused-platform-for-hpv-research
#5
REVIEW
Marc D Ryser, Patti E Gravitt, Evan R Myers
Health economic modeling has become an invaluable methodology for the design and evaluation of clinical and public health interventions against the human papillomavirus (HPV) and associated diseases. At the same time, relatively little attention has been paid to a different yet complementary class of models, namely that of mechanistic mathematical models. The primary focus of mechanistic mathematical models is to better understand the intricate biologic mechanisms and dynamics of disease. Inspired by a long and successful history of mechanistic modeling in other biomedical fields, we highlight several areas of HPV research where mechanistic models have the potential to advance the field...
June 2017: Papillomavirus Research
https://www.readbyqxmd.com/read/28716976/pregnant-women-should-not-be-categorised-as-a-vulnerable-population-in-biomedical-research-studies-ending-a-vicious-cycle-of-vulnerability
#6
EDITORIAL
Carleigh B Krubiner, Ruth R Faden
No abstract text is available yet for this article.
July 17, 2017: Journal of Medical Ethics
https://www.readbyqxmd.com/read/28716717/big-gaba-edited-mr-spectroscopy-at-24-research-sites
#7
Mark Mikkelsen, Peter B Barker, Pallab K Bhattacharyya, Maiken K Brix, Pieter F Buur, Kim M Cecil, Kimberly L Chan, David Y-T Chen, Alexander R Craven, Koen Cuypers, Michael Dacko, Niall W Duncan, Ulrike Dydak, David A Edmondson, Gabriele Ende, Lars Ersland, Fei Gao, Ian Greenhouse, Ashley D Harris, Naying He, Stefanie Heba, Nigel Hoggard, Tun-Wei Hsu, Jacobus F A Jansen, Alayar Kangarlu, Thomas Lange, R Marc Lebel, Yan Li, Chien-Yuan E Lin, Jy-Kang Liou, Jiing-Feng Lirng, Feng Liu, Ruoyun Ma, Celine Maes, Marta Moreno-Ortega, Scott O Murray, Sean Noah, Ralph Noeske, Michael D Noseworthy, Georg Oeltzschner, James J Prisciandaro, Nicolaas A J Puts, Timothy P L Roberts, Markus Sack, Napapon Sailasuta, Muhammad G Saleh, Michael-Paul Schallmo, Nicholas Simard, Stephan P Swinnen, Martin Tegenthoff, Peter Truong, Guangbin Wang, Iain D Wilkinson, Hans-Jörg Wittsack, Hongmin Xu, Fuhua Yan, Chencheng Zhang, Vadim Zipunnikov, Helge J Zöllner, Richard A E Edden
Magnetic resonance spectroscopy (MRS) is the only biomedical imaging method that can noninvasively detect endogenous signals from the neurotransmitter γ-aminobutyric acid (GABA) in the human brain. Its increasing popularity has been aided by improvements in scanner hardware and acquisition methodology, as well as by broader access to pulse sequences that can selectively detect GABA, in particular J-difference spectral editing sequences. Nevertheless, implementations of GABA-edited MRS remain diverse across research sites, making comparisons between studies challenging...
July 14, 2017: NeuroImage
https://www.readbyqxmd.com/read/28713851/building-an-experimental-model-of-the-human-body-with-non-physiological-parameters
#8
Joseph M Labuz, Christopher Moraes, David R Mertz, Brendan M Leung, Shuichi Takayama
New advances in engineering and biomedical technology have enabled recent efforts to capture essential aspects of human physiology in microscale, in-vitro systems. The application of these advances to experimentally model complex processes in an integrated platform - commonly called a 'human-on-a-chip (HOC)' - requires that relevant compartments and parameters be sized correctly relative to each other and to the system as a whole. Empirical observation, theoretical treatments of resource distribution systems and natural experiments can all be used to inform rational design of such a system, but technical and fundamental challenges (e...
March 2017: Technology
https://www.readbyqxmd.com/read/28710837/quality-of-life-anxiety-prevalence-depression-symptomatology-and-suicidal-ideation-among-acne-patients-in-lithuania
#9
L Lukaviciute, P Navickas, A Navickas, J Grigaitiene, R Ganceviciene, C C Zouboulis
BACKGROUND/OBJECTIVE: We aimed to determine the prevalence of anxiety, depression symptomatology and suicidal ideation among patients with acne and the impact of this skin condition on the quality of life in Lithuania. METHODS: The mental health of patients with acne was assessed using an adapted Hospital Anxiety and Depression Scale, the Dermatology Quality of Life Index, questions about characteristics of acne. The study was authorized by the Regional Biomedical Research Ethics Committee...
July 14, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28705239/nap-the-network-analysis-profiler-a-web-tool-for-easier-topological-analysis-and-comparison-of-medium-scale-biological-networks
#10
Theodosios Theodosiou, Georgios Efstathiou, Nikolas Papanikolaou, Nikos C Kyrpides, Pantelis G Bagos, Ioannis Iliopoulos, Georgios A Pavlopoulos
OBJECTIVE: Nowadays, due to the technological advances of high-throughput techniques, Systems Biology has seen a tremendous growth of data generation. With network analysis, looking at biological systems at a higher level in order to better understand a system, its topology and the relationships between its components is of a great importance. Gene expression, signal transduction, protein/chemical interactions, biomedical literature co-occurrences, are few of the examples captured in biological network representations where nodes represent certain bioentities and edges represent the connections between them...
July 14, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28703248/immunoassay-quantification-using-surface-enhanced-fluorescence-sef-tags
#11
S A Camacho, R G Sobral-Filho, P H B Aoki, C J L Constantino, A G Brolo
Fluorescence-based immonoassays are widely used in several areas, ranging from basic biomedical research to disease diagnostics. A variety of new probes have been developed recently to address some limitations in typical assays performed with organic dyes. Ideally, new fluorescence tags that allow quantification with a low limit of detection are highly desired. In this work, the surface-enhanced fluorescence (SEF) phenomenon was explored in the development of tags for Immunoglobulin-M (IgM) detection. Shell-isolated gold nanoparticles (Au-SHINs) with 100 nm core size and a 10 nm silica shell were synthesized...
July 13, 2017: Analyst
https://www.readbyqxmd.com/read/28702646/low-toxicity-metallosomes-for-biomedical-applications-by-self-assembly-of-organometallic-metallosurfactants-and-phospholipids
#12
M Marín-García, N Benseny-Cases, M Camacho, J Suades, R Barnadas-Rodríguez
A new and convenient strategy for the preparation of metallosomes has been developed by mixing organometallic metallosurfactants and phospholipids. These aggregates show the characteristic properties of liposomes (stability upon dilution and low toxicity) and the toxicity is at least ten-fold lower than that of the metallosurfactant aggregates without phospholipids.
July 12, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28701272/sexually-transmitted-infections-challenges-ahead
#13
REVIEW
Magnus Unemo, Catriona S Bradshaw, Jane S Hocking, Henry J C de Vries, Suzanna C Francis, David Mabey, Jeanne M Marrazzo, Gerard J B Sonder, Jane R Schwebke, Elske Hoornenborg, Rosanna W Peeling, Susan S Philip, Nicola Low, Christopher K Fairley
WHO estimated that nearly 1 million people become infected every day with any of four curable sexually transmitted infections (STIs): chlamydia, gonorrhoea, syphilis, and trichomoniasis. Despite their high global incidence, STIs remain a neglected area of research. In this Commission, we have prioritised five areas that represent particular challenges in STI treatment and control. Chlamydia remains the most commonly diagnosed bacterial STI in high-income countries despite widespread testing recommendations, sensitive and specific non-invasive testing techniques, and cheap effective therapy...
July 7, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28698076/synthesis-and-characterization-of-chitosan-pvp-nanocellulose-composites-for-in-vitro-wound-dressing-application
#14
R Poonguzhali, S Khaleel Basha, V Sugantha Kumari
Biocompatible Chitosan/Poly (vinyl pyrrolidone)/Nanocellulose (CPN) composites were successfully prepared by solution casting method. The prepared bionanocomposites were characterized by Transmission electron microscopy (TEM), Thermo gravimetric analysis (TGA), X-ray diffraction (XRD) and Attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) spectra. TEM images revealed the average particle size of the nanocellulose is 6.1nm. Thermogravimetric analysis indicated that the thermal stability of the composites was decreased with increasing concentration of nanocellulose...
July 8, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28696568/reproducibility-of-studies-with-genetically-modified-mice
#15
H R Lijnen
In their Editorial in the May issue of JTH, Rosendaal and Reitsma address different factors that may contribute to irreproducible results. They also refer to the Recommendation and Guidelines article by Colin Longstaff where Shiny apps are discussed as a tool to simplify and standardize data analysis for global assays such as thrombin generation and euglobulin clot lysis assays. However, I believe that also for in vivo biomedical studies, in particular with genetically modified mice, the problem of reproducibility of data describing a specific phenotype is becoming a major concern...
July 11, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28696557/microscopy-and-image-analysis
#16
George McNamara, Michael Difilippantonio, Thomas Ried, Frederick R Bieber
This unit provides an overview of light microscopy, including objectives, light sources, filters, film, and color photography for fluorescence microscopy and fluorescence in situ hybridization (FISH). We believe there are excellent opportunities for cytogeneticists, pathologists, and other biomedical readers, to take advantage of specimen optical clearing techniques and expansion microscopy-we briefly point to these new opportunities. © 2017 by John Wiley & Sons, Inc.
July 11, 2017: Current Protocols in Human Genetics
https://www.readbyqxmd.com/read/28694034/insertion-and-deletion-derived-tumour-specific-neoantigens-and-the-immunogenic-phenotype-a-pan-cancer-analysis
#17
Samra Turajlic, Kevin Litchfield, Hang Xu, Rachel Rosenthal, Nicholas McGranahan, James L Reading, Yien Ning S Wong, Andrew Rowan, Nnennaya Kanu, Maise Al Bakir, Tim Chambers, Roberto Salgado, Peter Savas, Sherene Loi, Nicolai J Birkbak, Laurent Sansregret, Martin Gore, James Larkin, Sergio A Quezada, Charles Swanton
BACKGROUND: The focus of tumour-specific antigen analyses has been on single nucleotide variants (SNVs), with the contribution of small insertions and deletions (indels) less well characterised. We investigated whether the frameshift nature of indel mutations, which create novel open reading frames and a large quantity of mutagenic peptides highly distinct from self, might contribute to the immunogenic phenotype. METHODS: We analysed whole-exome sequencing data from 5777 solid tumours, spanning 19 cancer types from The Cancer Genome Atlas...
July 7, 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28689404/discovery-of-a-covalent-kinase-inhibitor-from-a-dna-encoded-small-molecule-library-%C3%A3-protein-library-selection
#18
Alix I Chan, Lynn M McGregor, Tara Jain, David R Liu
We previously reported interaction determination using unpurified proteins (IDUP), a method to selectively amplify DNA sequences encoding ligand:target pairs from a mixture of DNA-linked small molecules and unpurified protein targets in cell lysates. In this study, we applied IDUP to libraries of DNA-encoded bioactive compounds and DNA-tagged human kinases to identify ligand:protein binding partners out of 32 096 possible combinations in a single solution-phase library × library experiment. The results recapitulated known small molecule:protein interactions and also revealed that ethacrynic acid is a novel ligand and inhibitor of MAP2K6 kinase...
July 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28689090/social-and-emotional-wellbeing-assessment-instruments-for-use-with-indigenous-australians-a-critical-review
#19
REVIEW
M Le Grande, C F Ski, D R Thompson, P Scuffham, S Kularatna, A C Jackson, A Brown
RATIONALE: There is growing recognition that in addition to universally recognised domains and indicators of wellbeing (such as population health and life expectancy), additional frameworks are required to fully explain and measure Indigenous wellbeing. In particular, Indigenous Australian wellbeing is largely determined by colonisation, historical trauma, grief, loss, and ongoing social marginalisation. Dominant mainstream indicators of wellbeing based on the biomedical model may therefore be inadequate and not entirely relevant in the Indigenous context...
July 1, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28688492/quantifying-the-informativeness-for-biomedical-literature-summarization-an-itemset-mining-method
#20
Milad Moradi, Nasser Ghadiri
OBJECTIVE: Automatic text summarization tools can help users in the biomedical domain to access information efficiently from a large volume of scientific literature and other sources of text documents. In this paper, we propose a summarization method that combines itemset mining and domain knowledge to construct a concept-based model and to extract the main subtopics from an input document. Our summarizer quantifies the informativeness of each sentence using the support values of itemsets appearing in the sentence...
July 2017: Computer Methods and Programs in Biomedicine
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