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https://www.readbyqxmd.com/read/28728324/the-chicken-thigh-adductor-profundus-free-muscle-flap-a-novel-validated-non-living-microsurgery-simulation-training-model
#1
Georgios Pafitanis, Yasmine Serrar, Maria Raveendran, Ali Ghanem, Simon Myers
BACKGROUND: Simulation training is becoming an increasingly important component of skills acquisition in surgical specialties, including Plastic Surgery. Non-living simulation models have an established place in Plastic Surgical microsurgery training, and support the principles of replacement, reduction and refinement of animal use. A more sophisticated version of the basic chicken thigh microsurgery model has been developed to include dissection of a type 1-muscle flap and is described and validated here...
July 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28727813/label-free-three-dimensional-imaging-of-caenorhabditis-elegans-with-visible-optical-coherence-microscopy
#2
Séverine Coquoz, Paul J Marchand, Arno Bouwens, Laurent Mouchiroud, Vincenzo Sorrentino, Daniel Szlag, Johan Auwerx, Theo Lasser
Fast, label-free, high-resolution, three-dimensional imaging platforms are crucial for high-throughput in vivo time-lapse studies of the anatomy of Caenorhabditis elegans, one of the most commonly used model organisms in biomedical research. Despite the needs, methods combining all these characteristics have been lacking. Here, we present label-free imaging of live Caenorhabditis elegans with three-dimensional sub-micrometer resolution using visible optical coherence microscopy (visOCM). visOCM is a versatile optical imaging method which we introduced recently for tomography of cell cultures and tissue samples...
2017: PloS One
https://www.readbyqxmd.com/read/28726478/the-association-of-positive-emotion-and-first-smoking-lapse-an-ecological-momentary-assessment-study
#3
Christine Vinci, Liang Li, Cai Wu, Cho Y Lam, Lin Guo, Virmarie Correa-Fernández, Claire A Spears, Diana S Hoover, Paul E Etcheverry, David W Wetter
OBJECTIVE: Individuals attempting to quit smoking typically have poor success rates, and the majority fail to maintain long-term abstinence. Although a large body of evidence documents the impact of negative affect on reducing abstinence, there is a much smaller body of research on positive emotions, which could be an important mechanism that is associated with successful cessation. As such, this study examined positive emotions in real-time via ecological momentary assessment (EMA) to determine whether discrete positive emotions were uniquely related to 2 cessation milestones: quit day lapse and first lapse...
July 20, 2017: Health Psychology: Official Journal of the Division of Health Psychology, American Psychological Association
https://www.readbyqxmd.com/read/28725520/mucosal-thickening-occurs-in-contralateral-paranasal-sinuses-following-sinonasal-malignancy-treatment
#4
Alice Z Maxfield, Kyle J Chambers, Ahmad R Sedaghat, Derrick T Lin, Stacey T Gray
Objective  To investigate the incidence and degree of contralateral sinus disease following treatment of sinonasal malignancy (SNM) using radiological findings as an outcome measure. Study Design  Retrospective case series. Setting  Tertiary referral academic center. Participants  Patients with SNM treated with surgical and adjuvant radiotherapy with or without concurrent chemotherapy. Main Outcome Measures  Pre- and posttreatment computed tomography and magnetic resonance imaging scans, Lund-Mackay (LM) score, date of diagnosis, chemotherapy, and dosage of radiation therapy (RT)...
August 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28724930/assessment-of-different-techniques-for-3d-superimposition-of-serial-digital-maxillary-dental-casts-on-palatal-structures
#5
Georgios Vasilakos, Roman Schilling, Demetrios Halazonetis, Nikolaos Gkantidis
Serial 3-dimensional dental model superimposition provides a risk-free, detailed evaluation of morphological alterations on a patient's mouth. Here, we evaluated accuracy and precision of five palatal areas, used for superimposition of maxillary 3D digital dental casts. Sixteen pre- and post-orthodontic treatment dental casts of growing patients (median time lapse: 15.1 months) were superimposed on each palatal area using the iterative closest point algorithm. Area A (medial 2/3 of the third rugae and a small area dorsal to them) was considered the gold standard, due to high anatomical stability...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724100/ammonia-and-nitrous-oxide-emissions-from-broiler-houses-with-downtime-windrowed-litter
#6
Kyoung S Ro, Philip A Moore, Ariel A Szogi, Patricia D Millner
An emerging poultry manure management practice is in-house windrowing to disinfect the litter. However, this practice is likely to increase emissions of ammonia (NH) and nitrous oxide (NO) from the windrowed litter. The objective of this study was to quantitatively compare NH and NO emissions from broiler houses with and without in-house windrowing. Two broiler houses at a commercial farm were used to compare the NH and NO emissions. Gas emission measurements were conducted continuously and simultaneously for both the control house (without windrowing) and the house with windrowing during the same production periods...
May 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28720791/in-vivo-analysis-of-protein-crowding-within-the-nuclear-pore-complex-in-interphase-and-mitosis
#7
Hide A Konishi, Suguru Asai, Tomonobu M Watanabe, Shige H Yoshimura
The central channel of the nuclear pore complex (NPC) is occupied by non-structured polypeptides with a high content of Phe-Gly (FG) motifs. This protein-rich environment functions as an entropic barrier that prevents the passage of molecules, as well as the binding sites for karyopherins, to regulate macromolecular traffic between the nucleoplasm and the cytoplasm. In this study, we expressed individual Nups fused with a crowding-sensitive probe (GimRET) to determine the spatial distribution of protein-rich domains within the central channel in vivo, and characterize the properties of the entropic barrier...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28717157/cellular-uptake-pathways-of-sepiolite-nanofibers-and-dna-transfection-improvement
#8
Fidel Antonio Castro-Smirnov, Jeanne Ayache, Jean-Rémi Bertrand, Elodie Dardillac, Eric Le Cam, Olivier Piétrement, Pilar Aranda, Eduardo Ruiz-Hitzky, Bernard S Lopez
Sepiolite is a nanofibrous natural silicate that can be used as a nanocarrier because it can be naturally internalized into mammalian cells, due to its nano-size dimension. Therefore, deciphering the mechanisms of sepiolite cell internalization constitutes a question interesting biotechnology, for the use of sepiolite as nanocarrier, as well as environmental and public health concerns. Though it is low, the perfectly stable and natural intrinsic fluorescence of sepiolite nanofibers allows to follow their fate into cells by specifically sensitive technics...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28716279/the-initial-time-course-of-headache-in-patients-with-spontaneous-subarachnoid-hemorrhage
#9
Hata Čomić, Gabriel J E Rinkel, Mervyn D I Vergouwen
BACKGROUND: If acute severe headache disappears early after its onset, the question arises whether subarachnoid hemorrhage (SAH) should still be ruled out. We studied the initial time-course and minimal duration of headache in a consecutive series of neurologically intact patients with spontaneous SAH. METHODS: We included patients admitted between 2012 and 2015 within 48h after spontaneous SAH with a normal level of consciousness and no focal deficits. We retrieved data on headache severity, measured with a Numeric Rating Scale (NRS), <48h after ictus...
August 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28715382/odelay-a-large-scale-method-for-multi-parameter-quantification-of-yeast-growth
#10
Thurston Herricks, Fred D Mast, Song Li, John D Aitchison
Growth phenotypes of microorganisms are a strong indicator of their underlying genetic fitness and can be segregated into 3 growth regimes: lag-phase, log-phase, and stationary-phase. Each growth phase can reveal different aspects of fitness that are related to various environmental and genetic conditions. High-resolution and quantitative measurements of all 3 phases of growth are generally difficult to obtain. Here we present a detailed method to characterize all 3 growth phases on solid media using an assay called One-cell Doubling Evaluation of Living Arrays of Yeast (ODELAY)...
July 3, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28714685/adsorption-coupled-diffusion-of-gold-nanoclusters-within-a-large-pore-protein-crystal-scaffold
#11
Luke F Hartje, Brian E Munsky, Thomas W Ni, Christopher J Ackerson, Christopher D Snow
Large-pore protein crystals (LPCs) are ordered biologically-derived nanoporous materials exhibiting pore diameters greater than 8 nm. These substantial pores distinguish LPCs from typical nanoporous scaffolds; enabling engineered LPC materials to readily uptake, immobilize, and release macromolecular guests. In this study, macromolecular transport within an LPC environment has been experimentally and computationally investigated by studying adsorption-coupled diffusion of Au25(glutathione)18 nanoclusters within a crosslinked LPC scaffold via time-lapse confocal microscopy, bulk equilibrium adsorption, and hindered diffusion simulation...
July 17, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28712848/a-short-region-of-connexin43-reduces-human-glioma-stem-cell-migration-invasion-and-survival-through-src-pten-and-fak
#12
Myriam Jaraíz-Rodríguez, Ma Dolores Tabernero, María González-Tablas, Alvaro Otero, Alberto Orfao, Jose M Medina, Arantxa Tabernero
Connexin43 (CX43), a protein that forms gap junction channels and hemichannels in astrocytes, is downregulated in high-grade gliomas. Its relevance for glioma therapy has been thoroughly explored; however, its positive effects on proliferation are counterbalanced by its effects on migration and invasion. Here, we show that a cell-penetrating peptide based on CX43 (TAT-Cx43266-283) inhibited c-Src and focal adhesion kinase (FAK) and upregulated phosphatase and tensin homolog in glioma stem cells (GSCs) derived from patients...
July 3, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28712646/live-births-after-embryo-selection-using-morphokinetics-versus-conventional-morphology-a-retrospective-analysis
#13
Simon Fishel, Alison Campbell, Sue Montgomery, Rachel Smith, Lynne Nice, Samantha Duffy, Lucy Jenner, Kathyrn Berrisford, Louise Kellam, Rob Smith, Ivy D'Cruz, Ashley Beccles
The increasing corpus of clinical studies using time-lapse imaging for embryo selection demonstrates considerable variation in study protocols and only limited-sized study cohorts. Outcome measures are based on implantation or clinical pregnancy; some predict blastulation from early cleavage-stage data, and few have evaluated live birth. Erroneously, most studies treat the embryos as independent variables and do not include patient or treatment variables in the statistical analyses. In this study, cohort size was 14,793 patients and 23,762 cycles...
June 23, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28710355/high-resolution-imaging-of-dna-methylation-dynamics-using-a-zebrafish-reporter
#14
Ranran Zhang, Lian Liu, Yuxiao Yao, Fei Fei, Feng Wang, Qian Yang, Yonghao Gui, Xu Wang
As one of the major epigenetic modifications, DNA methylation is constantly regulated during embryonic development, cell lineage commitment, and pathological processes. To facilitate real-time observation of DNA methylation, we generated a transgenic zebrafish reporter of DNA methylation (zebraRDM) via knockin of an mCherry-fused methyl-CpG binding domain (MBD) probe driven by the bactin2 promoter. The probe colocalized with heterochromatin, and its intensity was positively correlated with 5 mC immunostaining at a subcellular resolution in early embryos...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28704207/the-adult-male-rape-victim-forensic-description-of-a-series-of-57-cases
#15
Michelangelo Bruno Casali, Elisa Palazzo, Alberto Blandino, Alessio Battistini, Francesca Motta, Alessandra Kustermann, Cristina Cattaneo
A retrospective analysis on 57 adult male victims of sexual violence has been performed. Age, nationality and anamnesis of the victims, location of the assault, type of violence, number and identity of the assailants, presence of physical injuries, lapse of time between the assault and the request of medical assistance, and toxicological and semen detection tests were analyzed. Victims were mostly in the 31- to 40-year age group. Ten victims referred themselves as either active homosexuals or bisexuals. Forced oral and/or anal penetration was registered in 86...
July 13, 2017: American Journal of Forensic Medicine and Pathology
https://www.readbyqxmd.com/read/28703790/a-fluorescence-based-imaging-method-to-measure-in-vitro-and-in-vivo-mitophagy-using-mt-keima
#16
Nuo Sun, Daniela Malide, Jie Liu, Ilsa I Rovira, Christian A Combs, Toren Finkel
Mitophagy is a cellular process that selectively removes damaged, old or dysfunctional mitochondria. Defective mitophagy is thought to contribute to normal aging and to various neurodegenerative and cardiovascular diseases. Previous methods used to detect mitophagy in vivo were cumbersome, insensitive and difficult to quantify. We created a transgenic mouse model that expresses the pH-dependent fluorescent protein mt-Keima in order to more readily assess mitophagy. Keima is a pH-sensitive, dual-excitation ratiometric fluorescent protein that also exhibits resistance to lysosomal proteases...
August 2017: Nature Protocols
https://www.readbyqxmd.com/read/28701768/microstructural-evolution-during-sintering-of-copper-particles-studied-by-laboratory-diffraction-contrast-tomography-labdct
#17
S A McDonald, C Holzner, E M Lauridsen, P Reischig, A P Merkle, P J Withers
Pressureless sintering of loose or compacted granular bodies at elevated temperature occurs by a combination of particle rearrangement, rotation, local deformation and diffusion, and grain growth. Understanding of how each of these processes contributes to the densification of a powder body is still immature. Here we report a fundamental study coupling the crystallographic imaging capability of laboratory diffraction contrast tomography (LabDCT) with conventional computed tomography (CT) in a time-lapse study...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28700652/anomalous-diffusion-and-q-weibull-velocity-distributions-in-epithelial-cell-migration
#18
Tatiane Souza Vilela Podestá, Tiago Venzel Rosembach, Anésia Aparecida Dos Santos, Marcelo Lobato Martins
In multicellular organisms, cell motility is central in all morphogenetic processes, tissue maintenance, wound healing and immune surveillance. Hence, the control of cell motion is a major demand in the creation of artificial tissues and organs. Here, cell migration assays on plastic 2D surfaces involving normal (MDCK) and tumoral (B16F10) epithelial cell lines were performed varying the initial density of plated cells. Through time-lapse microscopy quantities such as speed distributions, velocity autocorrelations and spatial correlations, as well as the scaling of mean-squared displacements were determined...
2017: PloS One
https://www.readbyqxmd.com/read/28700594/hierarchical-patterning-modes-orchestrate-hair-follicle-morphogenesis
#19
James D Glover, Kirsty L Wells, Franziska Matthäus, Kevin J Painter, William Ho, Jon Riddell, Jeanette A Johansson, Matthew J Ford, Colin A B Jahoda, Vaclav Klika, Richard L Mort, Denis J Headon
Two theories address the origin of repeating patterns, such as hair follicles, limb digits, and intestinal villi, during development. The Turing reaction-diffusion system posits that interacting diffusible signals produced by static cells first define a prepattern that then induces cell rearrangements to produce an anatomical structure. The second theory, that of mesenchymal self-organisation, proposes that mobile cells can form periodic patterns of cell aggregates directly, without reference to any prepattern...
July 2017: PLoS Biology
https://www.readbyqxmd.com/read/28697460/effect-of-progesterone-and-its-synthetic-analogs-on-reproduction-and-embryonic-development-of-a-freshwater-invertebrate-model
#20
Zita Zrinyi, Gabor Maasz, Linwen Zhang, Akos Vertes, Sandor Lovas, Tibor Kiss, Karoly Elekes, Zsolt Pirger
The presence of a mixture of progestogens at ng/L concentration levels in surface waters is a worldwide problem. Only a few studies explore the effect of progestogen treatment in a mixture as opposed to individual chemicals to shed light on how non-target species respond to these contaminants. In the present study, we used an invertebrate model species, Lymnaea stagnalis, exposed to a mixture of four progestogens (progesterone, levonorgestrel, drospirenone, and gestodene) in 10ng/L concentration for 3 weeks...
June 29, 2017: Aquatic Toxicology
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