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https://www.readbyqxmd.com/read/29228309/prp8-intein-in-dermatophytes-evolution-and-species-identification
#1
Hans Garcia Garces, Raquel Theodoro Cordeiro, E Bagagli
Dermatophytes are keratinophilic fungi belonging to the family Arthrodermataceae. Despite having a monophyletic origin, its systematics has always been complex and controversial. Sequencing of nuclear ribosomal ITS and D1/D2 rDNA has been proposed as an efficient tool for identifying species in this group of fungi, while multilocus analyses have been used for phylogenetic species recognition. However, the search for new markers, with sequence and size variation, which enable species identification in only one polymerase chain reaction (PCR) step, is very attractive...
December 8, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/29227108/visualizing-single-cell-secretion-dynamics-with-single-protein-sensitivity
#2
Matthew McDonald, André Gemeinhardt, Katharina König, Marek Piliarik, Stefanie Schaffer, Simon Völkl, Michael Aigner, Andreas Mackensen, Vahid Sandoghdar
Cellular secretion of proteins into the extracellular environment is an essential mediator of critical biological mechanisms, including cell-to-cell communication, immunological response, targeted delivery, and differentiation. Here, we report a novel methodology that allows for the real-time detection and imaging of single unlabeled proteins that are secreted from individual living cells. This is accomplished via interferometric detection of scattered light (iSCAT), and is demonstrated with Laz388 cells-an Epstein-Barr virus (EBV) transformed B cell line...
December 11, 2017: Nano Letters
https://www.readbyqxmd.com/read/29227103/a-robust-molecular-network-motif-for-period-doubling-devices
#3
Christian Cuba Samaniego, Elisa Franco
Life is sustained by a variety of cyclic processes such as cell division, muscle contraction, and neuron firing. The periodic signals powering these processes often direct a variety of other downstream systems, which operate at different time scales and must have the capacity to divide or multiply the period of the master clock. Period modulation is also an important challenge in synthetic molecular systems, where slow and fast components may have to be coordinated simultaneously by a single oscillator whose frequency is often difficult to tune...
December 11, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/29227035/mass-spectrometry-analyses-of-multicellular-tumour-spheroids
#4
REVIEW
Mitchell Acland, Parul Mittal, Noor A Lokman, Manuela Klingler-Hoffmann, Martin K Oehler, Peter Hoffmann
Multicellular tumour spheroids (MCTS) are a powerful biological in vitro model, which closely mimics the 3D structure of primary avascularised tumours. Mass spectrometry (MS) has established itself as a powerful analytical tool, not only to better understand and describe the complex structure of MCTS, but also to monitor their response to cancer therapeutics. The first part of this review focuses on traditional mass spectrometry approaches with an emphasis on elucidating the molecular characteristics of these structures...
December 11, 2017: Proteomics. Clinical Applications
https://www.readbyqxmd.com/read/29226826/prostate-magnetic-resonance-imaging-interpretation-varies-substantially-across-radiologists
#5
Geoffrey A Sonn, Richard E Fan, Pejman Ghanouni, Nancy N Wang, James D Brooks, Andreas M Loening, Bruce L Daniel, Katherine J To'o, Alan E Thong, John T Leppert
BACKGROUND: Multiparametric magnetic resonance imaging (mpMRI) interpreted by experts is a powerful tool for diagnosing prostate cancer. However, the generalizability of published results across radiologists of varying expertise has not been verified. OBJECTIVE: To assess variability in mpMRI reporting and diagnostic accuracy across radiologists of varying experience in routine clinical care. DESIGN, SETTING, AND PARTICIPANTS: Men who underwent mpMRI and MR-fusion biopsy between 2014-2016...
December 6, 2017: European Urology Focus
https://www.readbyqxmd.com/read/29226437/on-effective-graphic-communication-of-health-inequality-considerations-for-health-policy-researchers
#6
Yukiko Asada, Hannah Abel, Chris Skedgel, Grace Warner
Policy Points: Effective graphs can be a powerful tool in communicating health inequality. The choice of graphs is often based on preferences and familiarity rather than science. According to the literature on graph perception, effective graphs allow human brains to decode visual cues easily. Dot charts are easier to decode than bar charts, and thus they are more effective. Dot charts are a flexible and versatile way to display information about health inequality. Consistent with the health risk communication literature, the captions accompanying health inequality graphs should provide a numerical, explicitly calculated description of health inequality, expressed in absolute and relative terms, from carefully thought-out perspectives...
December 2017: Milbank Quarterly
https://www.readbyqxmd.com/read/29226293/ligand-induced-action-of-the-w2866-48-rotamer-toggle-switch-in-the-%C3%AE-2-adrenergic-receptor
#7
Anita Plazinska, Wojciech Plazinski, Rafal Luchowski, Artur Wnorowski, Wojciech Grudzinski, Wieslaw I Gruszecki
Studies focused on GPCRs, particularly on the β2-adrenergic receptor (β2-AR), have demonstrated the relationship between ligand structure, receptor conformational changes and the corresponding pharmacological outcomes. Herein, we studied the molecular details of the rotameric flip of the W2866.48 sidechain, i.e. a presumed action switch that has not been reported in native β2-AR thus far. It is believed that although both the 'active' and 'inactive' conformers of β2-AR exhibit similar conformations of this switch, it may still play a substantial role in the ligand-induced activation of the receptor...
December 11, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29226240/optical-computed-tomography-for-spatially-isotropic-four-dimensional-imaging-of-live-single-cells
#8
Laimonas Kelbauskas, Rishabh Shetty, Bin Cao, Kuo-Chen Wang, Dean Smith, Hong Wang, Shi-Hui Chao, Sandhya Gangaraju, Brian Ashcroft, Margaret Kritzer, Honor Glenn, Roger H Johnson, Deirdre R Meldrum
Quantitative three-dimensional (3D) computed tomography (CT) imaging of living single cells enables orientation-independent morphometric analysis of the intricacies of cellular physiology. Since its invention, x-ray CT has become indispensable in the clinic for diagnostic and prognostic purposes due to its quantitative absorption-based imaging in true 3D that allows objects of interest to be viewed and measured from any orientation. However, x-ray CT has not been useful at the level of single cells because there is insufficient contrast to form an image...
December 2017: Science Advances
https://www.readbyqxmd.com/read/29225599/promoter-specificity-and-efficacy-in-conditional-and-inducible-transgenic-targeting-of-lung-macrophages
#9
Alexandra L McCubbrey, Kristen C Allison, Alisa B Lee-Sherick, Claudia V Jakubzick, William J Janssen
Conditional and inducible Cre-loxP systems are used to target gene deletion to specific cell lineages and tissues through promoter-restricted expression of the bacterial DNA recombinase, Cre. Although Cre-loxP systems are widely used to target gene deletion in lung macrophages, limited data are published on the specificity and efficiency of "macrophage targeting" Cre lines. Using R26-stopfl/fl-TdTomato and tetOn-GFP reporter lines, we assessed the specificity and efficiency of four commercially available Cre driver lines that are often considered "macrophage specific...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29225512/development-of-the-multiple-gene-knockout-system-with-one-step-pcr-in-thermoacidophilic-crenarchaeon-sulfolobus-acidocaldarius
#10
Shoji Suzuki, Norio Kurosawa
Multiple gene knockout systems developed in the thermoacidophilic crenarchaeon Sulfolobus acidocaldarius are powerful genetic tools. However, plasmid construction typically requires several steps. Alternatively, PCR tailing for high-throughput gene disruption was also developed in S. acidocaldarius, but repeated gene knockout based on PCR tailing has been limited due to lack of a genetic marker system. In this study, we demonstrated efficient homologous recombination frequency (2.8 × 104 ± 6.9 × 103 colonies/μg DNA) by optimizing the transformation conditions...
2017: Archaea: An International Microbiological Journal
https://www.readbyqxmd.com/read/29225303/evaluation-of-heat-stress-response-in-crossbred-dairy-cows-under-tropical-climate-by-analysis-of-heart-rate-variability
#11
Chan Bun, Youki Watanabe, Yoshihisa Uenoyama, Naoko Inoue, Nahoko Ieda, Fuko Matsuda, Hiroko Tsukamura, Masayoshi Kuwahara, Kei-Ichiro Maeda, Satoshi Ohkura, Vutha Pheng
The present study aims to examine the effect of tropical temperatures on autonomic nervous activity in Cambodian dairy cattle by analyzing heart rate variability (HRV). Holter-type electrocardiograms were recorded in adult crossbred cows (Cambodian native × Holstein) either in a sheltered area or under direct sunlight. Rectal temperatures and heart rates increased in animals under direct sunlight as compared to those in the shelter. The power spectral analysis of HRV revealed that three out of the five cows studied underwent a decrease in parasympathetic nervous activity under direct sunlight with the remaining two cows showing no apparent change...
December 11, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29224260/-ten-years-retrospective-review-of-the-application-of-digital-medical-technology-in-general-surgery-in-china
#12
C H Fang, Y Y Lau, W P Zhou, W Cai
Digital medical technology is a powerful tool which has forcefully promoted the development of general surgery in China. In this article, we reviews the application status of three-dimensional visualization and three-dimensional printing technology in general surgery, introduces the development situation of surgical navigation guided by optical and electromagnetic technology and preliminary attempt to combined with mixed reality applied to complicated hepatectomy, looks ahead the development direction of digital medicine in the era of artificial intelligence and big data on behalf of surgical robot and radiomics...
December 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/29224229/power-doppler-ultrasound-assessment-of-vascularization-in-hidradenitis-suppurativa-lesions
#13
Raffaele Dante Caposiena Caro, Francesco Maria Solivetti, Luca Bianchi
BACKGROUND: Ultrasound and Power Doppler (PD) ultrasound are useful tools to study and monitor Hidradenitis Suppurativa (HS) patients. OBJECTIVE: Describe the Power Doppler signal of HS nodules, abscesses, fistulas. METHODS: A retrospective analysis of PD in mild, moderate, severe HS patients, collecting all demographic and clinical data. The lesions were classified according to their ultrasound morphology, describing the vascular degree - high, moderate, minimal - and distribution - peripheral, internal, mixed...
December 10, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29224076/next-generation-sequencing-of-genome-wide-crispr-screens
#14
Edwin H Yau, Tariq M Rana
Genome-wide functional genomic screens utilizing the clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9 system have proven to be a powerful tool for systematic genomic perturbation in mammalian cells and provide an alternative to previous screens utilizing RNA interference technology. The wide availability of these libraries through public plasmid repositories as well as the decreasing cost and speed in quantifying these screens using high-throughput next-generation sequencing (NGS) allows for the adoption of the technology in a variety of laboratories interested in diverse biologic questions...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29223802/proteogenomic-insights-into-uranium-tolerance-of-a-chernobyl-s-microbacterium-bacterial-isolate
#15
Gallois Nicolas, Alpha-Bazin Béatrice, Ortet Philippe, Barakat Mohamed, Piette Laurie, Long Justine, Berthomieu Catherine, Armengaud Jean, Chapon Virginie
Microbacterium oleivorans A9 is a uranium-tolerant actinobacteria isolated from the trench T22 located near the Chernobyl nuclear power plant. This site is contaminated with different radionuclides including uranium. To observe the molecular changes at the proteome level occurring in this strain upon uranyl exposure and understand molecular mechanisms explaining its uranium tolerance, we established its draft genome and used this raw information to perform an in-depth proteogenomics study. High-throughput proteomics were performed on cells exposed or not to 10μM uranyl nitrate sampled at three previously identified phases of uranyl tolerance...
December 6, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/29223077/multiple-linear-regression-based-congener-profile-correlation-to-estimate-the-toxicity-teq-and-dioxin-concentration-in-atmospheric-emissions
#16
D Palmer, J O Pou, L Gonzalez-Sabaté, J Díaz-Ferrero
The formation of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) is governed by complex chemical reactions with complex kinetic models. The simulation of Municipal Solid Waste incinerators, or other industrial thermal processes, is a powerful tool that can be used to optimize and control them, and reducing the number of components to simulate is mandatory for a proper use. In this study it has been determined that only the formation of 3 of the 17 main PCDD/F congeners can be considered as linearly independent...
December 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29222921/optimizing-rna-seq-studies-to-investigate-herbicide-resistance
#17
REVIEW
Darci A Giacomini, Todd Gaines, Roland Beffa, Patrick J Tranel
Transcriptomic profiling, specifically via RNA-seq, is becoming one of the more commonly used methods for investigating non-target site resistance (NTSR) to herbicides due to its high throughput capabilities and utility in organisms with little to no previous sequence information. A review of the weed science RNA-seq literature has revealed some basic principles behind generating quality data from these types of studies. First, studies that included more replicates per biotype and took steps to control for genetic background had significantly better control of false positives and, consequently, shorter lists of potential resistance genes to sift through...
December 9, 2017: Pest Management Science
https://www.readbyqxmd.com/read/29222761/coupling-fluxes-enzymes-and-regulation-in-genome-scale-metabolic-models
#18
Paul A Jensen
Genome-scale models have expanded beyond their metabolic origins. Multiple modeling frameworks are required to combine metabolism with enzymatic networks, transcription, translation, and regulation. Mathematical programming offers a powerful set of tools for tackling these "multi-modality" models, although special attention must be paid to the connections between modeling types. This chapter reviews common methods for combining metabolic and discrete logical models into a single mathematical programming framework...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29222528/structure-and-dynamics-of-cas9-hnh-domain-catalytic-state
#19
Zhicheng Zuo, Jin Liu
The bacterial CRISPR-Cas9 immune system has been harnessed as a powerful and versatile genome-editing tool and holds immense promise for future therapeutic applications. Despite recent advances in understanding Cas9 structures and its functional mechanism, little is known about the catalytic state of the Cas9 HNH nuclease domain, and identifying how the divalent metal ions affect the HNH domain conformational transition remains elusive. A deeper understanding of Cas9 activation and its cleavage mechanism can enable further optimization of Cas9-based genome-editing specificity and efficiency...
December 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29221423/assess-identify-make-it-happen-aim-for-preschools-a-tool-to-decrease-early-childhood-obesity
#20
Charlotte V Farewell, Jini E Puma, Jamie Powers, Elaine S Belansky
Early childhood obesity is at epidemic proportions and is a major risk factor for the development of chronic diseases in adulthood. Since the majority of preschoolers are placed in center-based care, best practice policy, system, and environment (PSE) changes in early child care settings plays an important role in defining early development of obesogenic behaviors. However, implementation of best practice PSE changes is often a challenge in low resource settings due to staff turnover, time constraints, cultural beliefs, and lack of health-related knowledge...
December 1, 2017: Health Promotion Practice
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