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https://www.readbyqxmd.com/read/28340478/different-dna-damage-response-of-cis-and-trans-isomers-of-commonly-used-uv-filter-after-the-exposure-on-adult-human-liver-stem-cells-and-human-lymphoblastoid-cells
#1
Anežka Sharma, Katarína Bányiová, Pavel Babica, Naouale El Yamani, Andrew Richard Collins, Pavel Čupr
2-ethylhexyl 4-methoxycinnamate (EHMC), used in many categories of personal care products (PCPs), is one of the most discussed ultraviolet filters because of its endocrine-disrupting effects. EHMC is unstable in sunlight and can be transformed from trans-EHMC to emergent cis-EHMC. Toxicological studies are focusing only on trans-EHMC; thus the toxicological data for cis-EHMC are missing. In this study, the in vitro genotoxic effects of trans- and cis-EHMC on adult human liver stem cells HL1-hT1 and human-derived lymphoblastoid cells TK-6 using a high-throughput comet assay were studied...
March 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28335800/a-new-method-for-in-vitro-feeding-of-rhipicephalus-australis-formerly-rhipicephalus-microplus-larvae-a-valuable-tool-for-tick-vaccine-development
#2
Jos J A Trentelman, Jos A G M Kleuskens, Jos van de Crommert, Theo P M Schetters
BACKGROUND: Rhipicephalus microplus is a hard tick that has a major impact on cattle health in tropical and subtropical regions because it feeds on cattle and is implicated in the transmission of pathogens that cause diseases such as bovine anaplasmosis and babesiosis. Presently, acaricides are used to control tick infestation but this is becoming increasingly less effective due to the emergence of tick strains that are resistant to one or more classes of acaricides. Anti-tick vaccines are a promising alternative to control tick infestation in cattle...
March 23, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28334556/impact-of-a-hospitalwide-quality-improvement-initiative-on-emergency-department-throughput-and-crowding-measures
#3
James D Melton, Fred Blind, A Brad Hall, Maureen Leckie, April Novotny
BACKGROUND: This pre- and postintervention analysis evaluates the impact of a systemwide, comprehensive, executively supported quality improvement (QI) project on emergency department (ED) throughput measures and crowding in a large nonacademic community hospital. METHODS: The two primary endpoints used to assess the impact of the project were (1) the percentage of all patients who were door-in to door-out in less than three hours and (2) the percentage of patients who left without being seen (LWBS)...
December 2016: Joint Commission Journal on Quality and Patient Safety
https://www.readbyqxmd.com/read/28330825/streamlining-workflow-and-automation-to-accelerate-laboratory-scale-protein-production
#4
REVIEW
Jennifer Konczal, Christopher H Gray
Protein production facilities are often required to produce diverse arrays of proteins for demanding methodologies including crystallography, NMR, ITC and other reagent intensive techniques. It is common for these teams to find themselves a bottleneck in the pipeline of ambitious projects. This pressure to deliver has resulted in the evolution of many novel methods to increase capacity and throughput at all stages in the pipeline for generation of recombinant proteins. This review aims to describe current and emerging options to accelerate the success of protein production in Escherichia coli...
March 18, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28328168/intrastriatal-transplantation-of-human-neural-stem-cells-restores-the-impaired-subventricular-zone-in-parkinsonian-mice
#5
Fuxing Zuo, Feng Xiong, Xia Wang, Xueyuan Li, Renzhi Wang, Wei Ge, Xinjie Bao
Cell replacement therapy using neural stem cells (NSCs) transplantation has recently emerged as a promising method of Parkinson's disease (PD) treatment; however, the underlying mechanisms are not fully understood. To gain new insights into the mechanisms of 6-hydroxydopamine (6-OHDA)-induced lesioning and therapeutic efficacy of human NSCs (hNSCs) transplantation, the striatum (ST) of intrastriatal 6-OHDA-injected parkinsonian mice were unilaterally engrafted with undifferentiated hNSCs. A high-throughput quantitative proteomic approach was used to characterize the proteome profiles of PD-related brain regions such as the SN, ST, olfactory bulb (OB), and subventricular zone (SVZ) in these mice...
March 22, 2017: Stem Cells
https://www.readbyqxmd.com/read/28325368/chagas-disease-diagnostic-applications-present-knowledge-and-future-steps
#6
V Balouz, F Agüero, C A Buscaglia
Chagas disease, caused by the protozoan Trypanosoma cruzi, is a lifelong and debilitating illness of major significance throughout Latin America and an emergent threat to global public health. Being a neglected disease, the vast majority of Chagasic patients have limited access to proper diagnosis and treatment, and there is only a marginal investment into R&D for drug and vaccine development. In this context, identification of novel biomarkers able to transcend the current limits of diagnostic methods surfaces as a main priority in Chagas disease applied research...
2017: Advances in Parasitology
https://www.readbyqxmd.com/read/28325207/using-a-systematic-framework-of-interventions-to-improve-early-discharges
#7
Hemali Patel, Sasha Morduchowicz, Michelle Mourad
BACKGROUND: Late-afternoon hospital discharges can lead to admission bottlenecks and negatively affect the flow of patients needing hospital admission. Delays in discharge are a prevalent health care problem and have been linked to increased length of stay, lower patient satisfaction scores, and adverse outcomes. As a result, hospitals are placing a renewed emphasis on early discharge as a way to reduce admission delays and achieve optimal patient flow. This study shows that the Model for Improvement (MFI) is an effective approach for complex improvement efforts...
April 2017: Joint Commission Journal on Quality and Patient Safety
https://www.readbyqxmd.com/read/28322598/screening-and-functional-profiling-of-small-molecule-hiv-1-entry-and-fusion-inhibitors
#8
Charline Giroud, Yuhong Du, Mariana Marin, Qui Min, Nathan T Jui, Haian Fu, Gregory B Melikyan
HIV-1 entry and fusion with target cells is an important target for antiviral therapy. However, a few currently approved treatments are not effective as monotherapy due to the emergence of drug resistance. This consideration has fueled efforts to develop new bioavailable inhibitors targeting different steps of the HIV-1 entry process. Here, a high-throughput screen was performed of a large library of 100,000 small molecules for HIV-1 entry/fusion inhibitors, using a direct virus-cell fusion assay in a 384 half-well format...
February 2017: Assay and Drug Development Technologies
https://www.readbyqxmd.com/read/28321417/technologies-for-proteome-wide-discovery-of-extracellular-host-pathogen-interactions
#9
REVIEW
Nadia Martinez-Martin
Pathogens have evolved unique mechanisms to breach the cell surface barrier and manipulate the host immune response to establish a productive infection. Proteins exposed to the extracellular environment, both cell surface-expressed receptors and secreted proteins, are essential targets for initial invasion and play key roles in pathogen recognition and subsequent immunoregulatory processes. The identification of the host and pathogen extracellular molecules and their interaction networks is fundamental to understanding tissue tropism and pathogenesis and to inform the development of therapeutic strategies...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28319085/synergistic-drug-combinations-for-cancer-identified-in-a-crispr-screen-for-pairwise-genetic-interactions
#10
Kyuho Han, Edwin E Jeng, Gaelen T Hess, David W Morgens, Amy Li, Michael C Bassik
Identification of effective combination therapies is critical to address the emergence of drug-resistant cancers, but direct screening of all possible drug combinations is infeasible. Here we introduce a CRISPR-based double knockout (CDKO) system that improves the efficiency of combinatorial genetic screening using an effective strategy for cloning and sequencing paired single guide RNA (sgRNA) libraries and a robust statistical scoring method for calculating genetic interactions (GIs) from CRISPR-deleted gene pairs...
March 20, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28314050/efficacy-of-rna-interference-knockdown-using-aerosolized-short-interfering-rnas-bound-to-nanoparticles-in-three-diverse-aphid-species
#11
M W Thairu, I H Skidmore, R Bansal, E Nováková, T E Hansen, H Li-Byarlay, S A Wickline, A K Hansen
RNA interference (RNAi) has emerged as a promising method for validating gene function; however, its utility in nonmodel insects has proven problematic, with delivery methods being one of the main obstacles. This study investigates a novel method of RNAi delivery in aphids, the aerosolization of short interfering RNA (siRNA)-nanoparticle complexes. By using nanoparticles as a siRNA carrier, the likelihood of cellular uptake is increased, when compared to methods previously used in insects. To determine the efficacy of this RNAi delivery system, siRNAs were aerosolized with and without nanoparticles in three aphid species: Acyrthosiphon pisum, Aphis glycines and Schizaphis graminum...
March 17, 2017: Insect Molecular Biology
https://www.readbyqxmd.com/read/28304148/the-enigmatic-role-of-runx1-in-female-related-cancers-current-knowledge-future-perspectives
#12
REVIEW
Alessandra I Riggio, Karen Blyth
Historically associated with the aetiology of human leukaemia, the RUNX1 gene has in recent years reared its head in an assortment of epithelial cancers. This review discusses the state-of-the-art knowledge of the enigmatic role played by RUNX1 in female-related cancers of the breast, the uterus and the ovary. The weight of evidence accumulated so far is indicative of a very context-dependent role, as either an oncogene or a tumour suppressor. This is corroborated by high-throughput sequencing endeavours which report different genetic alterations affecting the gene, including amplification, deep deletion and mutations...
March 17, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28303531/comprehensive-analysis-of-mile-gene-expression-data-set-advances-discovery-of-leukaemia-type-and-subtype-biomarkers
#13
Wojciech Labaj, Anna Papiez, Andrzej Polanski, Joanna Polanska
Large collections of data in studies on cancer such as leukaemia provoke the necessity of applying tailored analysis algorithms to ensure supreme information extraction. In this work, a custom-fit pipeline is demonstrated for thorough investigation of the voluminous MILE gene expression data set. Three analyses are accomplished, each for gaining a deeper understanding of the processes underlying leukaemia types and subtypes. First, the main disease groups are tested for differential expression against the healthy control as in a standard case-control study...
March 16, 2017: Interdisciplinary Sciences, Computational Life Sciences
https://www.readbyqxmd.com/read/28301062/metabolomic-guided-discovery-of-alzheimer-s-disease-biomarkers-from-body-fluid
#14
REVIEW
Che Nor Adlia Enche Ady, Siong Meng Lim, Lay Kek Teh, Mohd Zaki Salleh, Ai-Vyrn Chin, Maw Pin Tan, Philip Jun Hua Poi, Shahrul Bahyah Kamaruzzaman, Abu Bakar Abdul Majeed, Kalavathy Ramasamy
The rapid increase in the older population has made age-related diseases like Alzheimer's disease (AD) a global concern. Given that there is still no cure for this neurodegenerative disease, the drastic growth in the number of susceptible individuals represents a major emerging threat to public health. The poor understanding of the mechanisms underlying AD is deemed the greatest stumbling block against progress in definitive diagnosis and management of this disease. There is a dire need for biomarkers that can facilitate early diagnosis, classification, prognosis, and treatment response...
March 16, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28300610/changes-in-microrna-abundance-may-regulate-diapause-in-the-flesh-fly-sarcophaga-bullata
#15
Julie A Reynolds, Justin T Peyton, David L Denlinger
Diapause, an alternative developmental pathway characterized by changes in developmental timing and metabolism, is coordinated by molecular mechanisms that are not completely understood. MicroRNA (miRNA) mediated gene silencing is emerging as a key component of animal development and may have a significant role in initiating, maintaining, and terminating insect diapause. In the present study, we test this possibility by using high-throughput sequencing and qRT-PCR to discover diapause-related shifts in miRNA abundance in the flesh fly, Sarcophaga bullata...
March 11, 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28299739/mapping-the-substrate-recognition-landscapes-of-metalloproteases-using-comprehensive-mutagenesis
#16
Colin A Kretz
Protease specificity is controlled by exosites, which capture and orient the substrate, and the active site, which binds substrate residues near the P1-P1' scissile bond and catalyzes peptide hydrolysis. Techniques used to identify critical contact points between a protease and its substrate can be time consuming and labor-intensive. Screening tools such as phage display have been revitalized with the emergence of high-throughput sequencing technology, and can be used to interrogate protease substrate specificity...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28298438/single-cell-analysis-reveals-lineage-segregation-in-early-post-implantation-mouse-embryos
#17
Jing Wen, Yanwu Zeng, Zhuoqing Fang, Junjie Gu, Laixiang Ge, Fan Tang, Zepeng Qu, Jing Hu, Yaru Cui, Kunshan Zhang, Junbang Wang, Siguang Li, Yi Sun, Ying Jin
The mammalian post-implantation embryo has been extensively investigated at the tissue level. However, to unravel the molecular basis for the cell-fate plasticity and determination, it is essential to study the characteristics of individual cells. Especially, the individual definitive endoderm (DE) cells have not been characterized in vivo. Here, we report gene expression patterns in single cells freshly isolated from mouse embryos on days 5.5 and 6.5. Initial transcriptome data from 124 single cells yielded signature genes for the epiblast, visceral endoderm, and extra-embryonic ectoderm and revealed a unique distribution pattern of fibroblast growth factor (Fgf) ligands and receptors...
March 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28294984/defining-the-baseline-and-oxidant-perturbed-lipidomic-profiles-of-daphnia-magna
#18
Nadine S Taylor, Thomas A White, Mark R Viant
Recent technological advancement has enabled the emergence of lipidomics as an important tool for assessing molecular stress, one which has yet to be assessed fully as an approach in an environmental toxicological context. Here we have applied a high-resolution, non-targeted, nanoelectrospray ionisation (nESI) direct infusion mass spectrometry (DIMS) technique to assess the effects of oxidative stress to Daphnia magna both in vitro (air exposure of daphniid extracts) and in vivo (Cu(2+) exposure). Multivariate and univariate statistical analyses were used to distinguish any perturbations including oxidation to the D...
March 15, 2017: Metabolites
https://www.readbyqxmd.com/read/28293877/synthetic-protein-switches-theoretical-and-experimental-considerations
#19
Viktor Stein
Synthetic protein switches with tailored response functions are finding increasing applications as tools in basic research and biotechnology. With a number of successful design strategies emerging, the construction of synthetic protein switches still frequently necessitates an integrated approach that combines detailed biochemical and biophysical characterization in combination with high-throughput screening to construct tailored synthetic protein switches. This is increasingly complemented by computational strategies that aim to reduce the need for costly empirical optimization and thus facilitate the protein design process...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28293710/metaproteomic-strategies-and-applications-for-gut-microbial-research
#20
REVIEW
Mingming Xiao, Junjun Yang, Yuxin Feng, Yan Zhu, Xin Chai, Yuefei Wang
The human intestine hosts various complex microbial communities that are closely associated with multiple health and disease processes. Determining the composition and function of these microbial communities is critical to unveil disease mechanisms and promote human health. Recently, meta-omic strategies have been developed that use high-throughput techniques to provide a wealth of information, thus accelerating the study of gut microbes. Metaproteomics is a newly emerged analytical approach that aims to identify proteins on a large scale in complex environmental microbial communities (e...
March 14, 2017: Applied Microbiology and Biotechnology
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