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https://www.readbyqxmd.com/read/27913600/the-evolution-of-jaw-protrusion-mechanics-has-been-tightly-coupled-to-bentho-pelagic-divergence-in-damselfishes-pomacentridae
#1
W James Cooper, Casey B Carter, Andrew J Conith, Aaron N Rice, Mark W Westneat
Most species-rich lineages of aquatic organisms have undergone divergence between forms that feed from the substrate (benthic feeding) and forms that feed from the water column (pelagic feeding). Changes in trophic niche are frequently accompanied by changes in skull mechanics, and multiple fish lineages have evolved highly specialized biomechanical configurations that allow them to protrude their upper jaws toward the prey during feeding. Damselfishes (family Pomacentridae) are an example of a species-rich lineage with multiple trophic morphologies and feeding ecologies...
December 2, 2016: Journal of Experimental Biology
https://www.readbyqxmd.com/read/27913212/vcp-cooperates-with-ubxd1-to-degrade-mitochondrial-outer-membrane-protein-mcl1-in-model-of-huntington-s-disease
#2
Xing Guo, Xin Qi
Proteasome-dependent turnover of mitochondrial outer membrane (OMM)-associated proteins is one of the mechanisms for maintaining proper mitochondrial quality and function. However, the underlying pathways and their implications in human disease are poorly understood. Huntington's disease (HD) is a fatal, inherited neurodegenerative disorder caused by expanded CAG repeats in the N terminal of the huntingtin gene (mutant Huntingtin, mtHtt). In this study, we show an extensive degradation of the OMM protein MCL1 (Myeloid cell leukemia sequence 1) in both HD mouse striatal cells and HD patient fibroblasts...
November 29, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27908751/enhanced-potency-of-bivalent-small-molecule-gp41-inhibitors
#3
Vladimir Sofiyev, Hardeep Kaur, Beth A Snyder, Priscilla A Hogan, Roger G Ptak, Peter Hwang, Miriam Gochin
Low molecular weight peptidomimetic inhibitors with hydrophobic pocket binding properties and moderate fusion inhibitory activity against HIV-1 gp41-mediated cell fusion were elaborated by increasing the available surface area for interacting with the heptad repeat-1 (HR1) coiled coil on gp41. Two types of modifications were tested: 1) increasing the overall hydrophobicity of the molecules with an extension that could interact in the HR1 groove, and 2) forming symmetrical dimers with two peptidomimetic motifs that could potentially interact simultaneously in two hydrophobic pockets on the HR1 trimer...
November 19, 2016: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/27908113/on-the-cooperativity-of-association-and-reference-energy-scales-in-thermodynamic-perturbation-theory
#4
Bennett D Marshall
Equations of state for hydrogen bonding fluids are typically described by two energy scales. A short range highly directional hydrogen bonding energy scale as well as a reference energy scale which accounts for dispersion and orientationally averaged multi-pole attractions. These energy scales are always treated independently. In recent years, extensive first principles quantum mechanics calculations on small water clusters have shown that both hydrogen bond and reference energy scales depend on the number of incident hydrogen bonds of the water molecule...
November 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27893827/astrocyte-structural-and-molecular-response-to-elevated-intraocular-pressure-occurs-rapidly-and-precedes-axonal-tubulin-rearrangement-within-the-optic-nerve-head-in-a-rat-model
#5
Shandiz Tehrani, Lauren Davis, William O Cepurna, Tiffany E Choe, Diana C Lozano, Ashley Monfared, Lauren Cooper, Joshua Cheng, Elaine C Johnson, John C Morrison
Glaucomatous axon injury occurs at the level of the optic nerve head (ONH) in response to uncontrolled intraocular pressure (IOP). The temporal response of ONH astrocytes (glial cells responsible for axonal support) to elevated IOP remains unknown. Here, we evaluate the response of actin-based astrocyte extensions and integrin-based signaling within the ONH to 8 hours of IOP elevation in a rat model. IOP elevation of 60 mm Hg was achieved under isoflurane anesthesia using anterior chamber cannulation connected to a saline reservoir...
2016: PloS One
https://www.readbyqxmd.com/read/27891118/colistin-in-pig-production-chemistry-mechanism-of-antibacterial-action-microbial-resistance-emergence-and-one-health-perspectives
#6
REVIEW
Mohamed Rhouma, Francis Beaudry, William Thériault, Ann Letellier
Colistin (Polymyxin E) is one of the few cationic antimicrobial peptides commercialized in both human and veterinary medicine. For several years now, colistin has been considered the last line of defense against infections caused by multidrug-resistant Gram-negative such as Acinetobacter baumannii, Pseudomonas aeruginosa, and Klebsiella pneumoniae. Colistin has been extensively used orally since the 1960s in food animals and particularly in swine for the control of Enterobacteriaceae infections. However, with the recent discovery of plasmid-mediated colistin resistance encoded by the mcr-1 gene and the higher prevalence of samples harboring this gene in animal isolates compared to other origins, livestock has been singled out as the principal reservoir for colistin resistance amplification and spread...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27875849/-short-and-long-term-results-in-operable-pancreatic-ductal-adenocarcinomas-from-a-cooperation-between-two-departments-gastroenterology-visceral-surgery-at-non-university-hospitals-benchmarked-to-results-of-expert-centers
#7
W Dippold, V Sivanathan, K Statt, M Roitman, K H Link
The only curative approach in pancreatic ductal adenocarcinoma (PDAC) is resection, which is possible only in 15 - 30 % of patients. Local tumor spread or distant metastases are contraindications for resection in the majority of patients. Surgical-oncological quality with short- and long-term results are varying tremendously, so that "expertise/quality" are associated to hospital- or surgeon's volume and/or center formation. The treatment results also depend, to a great extent, on the medical diagnostic quality...
November 22, 2016: Zeitschrift Für Gastroenterologie
https://www.readbyqxmd.com/read/27871486/impact-of-microrna-levels-target-site-complementarity-and-cooperativity-on-competing-endogenous-rna-regulated-gene-expression
#8
Rémy Denzler, Sean E McGeary, Alexandra C Title, Vikram Agarwal, David P Bartel, Markus Stoffel
Expression changes of competing endogenous RNAs (ceRNAs) have been proposed to influence microRNA (miRNA) activity and thereby regulate other transcripts containing miRNA-binding sites. Here, we find that although miRNA levels define the extent of repression, they have little effect on the magnitude of the ceRNA expression change required to observe derepression. Canonical 6-nt sites, which typically mediate modest repression, can nonetheless compete for miRNA binding, with potency ∼20% of that observed for canonical 8-nt sites...
November 3, 2016: Molecular Cell
https://www.readbyqxmd.com/read/27864579/automated-segmentation-reveals-silent-radiographic-progression-in-adult-onset-vanishing-white-matter-disease
#9
Thomas Huber, Marina Herwerth, Esther Alberts, Jan S Kirschke, Claus Zimmer, Ruediger Ilg
Adult-onset vanishing white-matter disease (VWM) is a rare autosomal recessive disease with neurological symptoms such as ataxia and paraparesis, showing extensive white-matter hyperintensities (WMH) on magnetic resonance (MR) imaging. Besides symptom-specific scores like the International Cooperative Ataxia Rating Scale (ICARS), there is no established tool to monitor disease progression. Because of extensive WMH, visual comparison of MR images is challenging. Here, we report the results of an automated method of segmentation to detect alterations in T2-weighted fluid-attenuated-inversion-recovery (FLAIR) sequences in a one-year follow-up study of a clinically stable patient with genetically diagnosed VWM...
November 18, 2016: Neuroradiology Journal
https://www.readbyqxmd.com/read/27862695/pan-genotypic-treatment-regimens-for-hepatitis-c-virus-advantages-and-disadvantages-in-high-and-low-income-regions
#10
REVIEW
C Hézode
During the last 5 years, the availability of direct-acting antiviral (DAA) agents has revolutionized the treatment of hepatitis C virus (HCV). Compared with interferon/ribavirin-the previous standard of care-DAA combination regimens offer improved sustained virological response (SVR) rates, shorter treatment durations of 8-24 weeks, convenient once-daily single-tablet formulations and more favourable tolerability profiles. HCV treatment is complex, and the choice of therapy must consider a complex range of factors, including baseline viral load, fibrosis stage, the HCV genotype and subgenotype, and the presence of resistance-associated substitutions at baseline...
November 9, 2016: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/27845041/a-secretome-analysis-reveals-that-ppar%C3%AE-is-upregulated-by-fractionated-dose-%C3%AE-irradiation-in-three-dimensional-keratinocyte-cultures
#11
Jeeyong Lee, Hyun-Ji Kim, Jae Youn Yi
Studies have shown that γ-irradiation induces various biological responses, including oxidative stress and apoptosis, as well as cellular repair and immune system responses. However, most such studies have been performed using traditional two-dimensional cell culture systems, which are limited in their ability to faithfully represent in vivo conditions. A three-dimensional (3D) environment composed of properly interconnected and differentiated cells that allow communication and cooperation among cells via secreted molecules would be expected to more accurately reflect cellular responses...
November 12, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27836967/the-economic-burden-of-a-salmonella-thompson-outbreak-caused-by-smoked-salmon-in-the-netherlands-2012-2013
#12
Anita W M Suijkerbuijk, Martijn Bouwknegt, Marie-Josee J Mangen, G Ardine de Wit, Wilfrid van Pelt, Paul Bijkerk, Ingrid H M Friesema
BACKGROUND: In 2012, the Netherlands experienced the most extensive food-related outbreak of Salmonella ever recorded. It was caused by smoked salmon contaminated with Salmonella Thompson during processing. In total, 1149 cases of salmonellosis were laboratory confirmed and reported to RIVM. Twenty percent of cases was hospitalised and four cases were reported to be fatal. The purpose of this study was to estimate total costs of the Salmonella Thompson outbreak. METHODS: Data from a case-control study were used to estimate the cost-of-illness of reported cases (i...
November 11, 2016: European Journal of Public Health
https://www.readbyqxmd.com/read/27825240/multicomponent-adsorption-in-mesoporous-flexible-materials-with-flat-histogram-monte-carlo-methods
#13
Nathan A Mahynski, Vincent K Shen
We demonstrate an extensible flat-histogram Monte Carlo simulation methodology for studying the adsorption of multicomponent fluids in flexible porous solids. This methodology allows us to easily obtain the complete free energy landscape for the confined fluid-solid system in equilibrium with a bulk fluid of any arbitrary composition. We use this approach to study the adsorption of a prototypical coarse-grained binary fluid in "Hookean" solids, where the free energy of the solid may be described as a simple spring...
November 7, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27814769/somatic-cancer-variant-curation-and-harmonization-through-consensus-minimum-variant-level-data
#14
Deborah I Ritter, Sameek Roychowdhury, Angshumoy Roy, Shruti Rao, Melissa J Landrum, Dmitriy Sonkin, Mamatha Shekar, Caleb F Davis, Reece K Hart, Christine Micheel, Meredith Weaver, Eliezer M Van Allen, Donald W Parsons, Howard L McLeod, Michael S Watson, Sharon E Plon, Shashikant Kulkarni, Subha Madhavan
BACKGROUND: To truly achieve personalized medicine in oncology, it is critical to catalog and curate cancer sequence variants for their clinical relevance. The Somatic Working Group (WG) of the Clinical Genome Resource (ClinGen), in cooperation with ClinVar and multiple cancer variant curation stakeholders, has developed a consensus set of minimal variant level data (MVLD). MVLD is a framework of standardized data elements to curate cancer variants for clinical utility. With implementation of MVLD standards, and in a working partnership with ClinVar, we aim to streamline the somatic variant curation efforts in the community and reduce redundancy and time burden for the interpretation of cancer variants in clinical practice...
November 4, 2016: Genome Medicine
https://www.readbyqxmd.com/read/27809237/discovery-of-bioactive-compounds-by-the-uic-icbg-drug-discovery-program-in-the-18-years-since-1998
#15
REVIEW
Hong-Jie Zhang, Wan-Fei Li, Harry H S Fong, Djaja Doel Soejarto
The International Cooperative Biodiversity Groups (ICBG) Program based at the University of Illinois at Chicago (UIC) is a program aimed to address the interdependent issues of inventory and conservation of biodiversity, drug discovery and sustained economic growth in both developing and developed countries. It is an interdisciplinary program involving the extensive synergies and collaborative efforts of botanists, chemists and biologists in the countries of Vietnam, Laos and the USA. The UIC-ICBG drug discovery efforts over the past 18 years have resulted in the collection of a cumulative total of more than 5500 plant samples (representing more than 2000 species), that were evaluated for their potential biological effects against cancer, HIV, bird flu, tuberculosis and malaria...
October 31, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27806918/effects-of-bni5-binding-on-septin-filament-organization
#16
Elizabeth A Booth, Sarah M Sterling, Dustin Dovala, Eva Nogales, Jeremy Thorner
Septins are a protein family found in all eukaryotes (except higher plants) that have roles in membrane remodeling and formation of diffusion barriers and as a scaffold to recruit other proteins. In budding yeast, proper execution of cytokinesis and cell division requires the formation of a collar of circumferential filaments at the bud neck. These filaments are assembled from apolar septin hetero-octamers. Currently, little is known about the mechanisms that control the arrangement and dynamics of septin structures...
October 30, 2016: Journal of Molecular Biology
https://www.readbyqxmd.com/read/27805507/transplant-ethics
#17
Nur Altınörs, Mehmet Haberal
OBJECTIVES: The aim of this study was to review and discuss the great variety of ethical issues related to organ donation, organ procurement, transplant activities, and new ethical problems created as a result of technologic and scientific developments. MATERIALS AND METHODS: An extensive literature survey was made, and expert opinions were obtained. RESULTS: The gap between demand and supply of organs for transplant has yielded to organ trafficking, organ tourism, and commercialism...
November 2016: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/27802042/3d-dna-origami-cuboids-as-monodisperse-patchy-nanoparticles-for-switchable-hierarchical-self-assembly
#18
Thomas Tigges, Thomas Heuser, Rahul Tiwari, Andreas Walther
The rational design of anisotropic interaction patterns is a key step for programming colloid and nanoparticle self-assembly and emergent functions. Herein, we demonstrate a concept for harnessing the capabilities of 3D DNA origami for extensive supracolloidal self-assembly, and showcase its use for making truly monodisperse, patchy, divalent nanocuboids that can self-assemble into supracolloidal fibrils via programmable DNA hybridization. A change in the number of connector duplexes at the patches reveals that multivalency and cooperativity play crucial roles to enhance superstructure formation...
November 1, 2016: Nano Letters
https://www.readbyqxmd.com/read/27801829/component-based-modelling-for-scalable-smart-city-systems-interoperability-a-case-study-on-integrating-energy-demand-response-systems
#19
Esther Palomar, Xiaohong Chen, Zhiming Liu, Sabita Maharjan, Jonathan Bowen
Smart city systems embrace major challenges associated with climate change, energy efficiency, mobility and future services by embedding the virtual space into a complex cyber-physical system. Those systems are constantly evolving and scaling up, involving a wide range of integration among users, devices, utilities, public services and also policies. Modelling such complex dynamic systems' architectures has always been essential for the development and application of techniques/tools to support design and deployment of integration of new components, as well as for the analysis, verification, simulation and testing to ensure trustworthiness...
October 28, 2016: Sensors
https://www.readbyqxmd.com/read/27798521/state-level-farmers-market-activities-a-review-of-cdc-funded-state-public-health-actions-that-support-farmers-markets
#20
Sahra A Kahin, Demia S Wright, Anu Pejavara, Sonia A Kim
CONTEXT: Introducing farmers markets to underserved areas, or supporting existing farmers markets, can increase access and availability of fruits and vegetables and encourage healthy eating. Since 2003, the Centers for Disease Control and Prevention (CDC)'s Division of Nutrition, Physical Activity, and Obesity (DNPAO) has provided guidance and funding to state health departments (SHDs) to support the implementation of interventions, including activities around farmers markets, to address healthy eating, and improve the access to and availability of fruits and vegetables at state and community levels...
October 28, 2016: Journal of Public Health Management and Practice: JPHMP
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