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https://www.readbyqxmd.com/read/28817788/the-joint-effect-of-the-endothelin-receptor-b-gene-ednrb-polymorphism-rs10507875-and-nitric-oxide-synthase-3-gene-nos3-polymorphism-rs869109213-in-slovenian-patients-with-type-2-diabetes-mellitus-and-diabetic-retinopathy
#1
Dejan Bregar, Ines Cilenšek, Sara Mankoč, Ana Reschner, Danijel Petrovič, Mojca Globočnik Petrovič
Increasing evidence suggests that endothelin and nitric oxide synthase genes and their products exert biological effects on the vasculature via the nitric oxide or endothelin pathway. The aim of the study was to evaluate the association of rs10507875 and rs869109213 (alone or in interaction) with diabetic retinopathy (DR) in subjects with type 2 diabetes mellitus (T2DM). We genotyped the single nucleotide polymorphism rs10507875 of the endothelin receptor B gene (EDNRB) and variable number tandem repeats rs869109213 of the nitric oxide synthase 3 gene (NOS3) in 270 Slovenian patients with DR and T2DM and 256 controls with T2DM without clinical signs of DR...
August 17, 2017: Bosnian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28817778/the-oxidation-state-of-4fe4s-clusters-modulates-the-dna-binding-affinity-of-dna-repair-proteins
#2
Edmund C M Tse, Theodore J Zwang, Jacqueline K Barton
A central question important to understanding DNA repair is how certain proteins are able to search for, detect, and fix DNA damage on a biologically relevant timescale. A feature of many base excision repair proteins is that they contain [4Fe4S] clusters that may aid their search for lesions. In this report, we establish the importance of the oxidation state of the redox-active [4Fe4S] cluster in the DNA damage detection process. We utilize DNA-modified electrodes to generate repair proteins with [4Fe4S] clusters in the 2+ and 3+ states by bulk electrolysis under an O2-free atmosphere...
August 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28817753/efficacy-and-safety-of-durvalumab-in-locally-advanced-or-metastatic-urothelial-carcinoma-updated-results-from-a-phase-1-2-open-label-study
#3
Thomas Powles, Peter H O'Donnell, Christophe Massard, Hendrik-Tobias Arkenau, Terence W Friedlander, Christopher J Hoimes, Jae Lyun Lee, Michael Ong, Srikala S Sridhar, Nicholas J Vogelzang, Mayer N Fishman, Jingsong Zhang, Sandy Srinivas, Jigar Parikh, Joyce Antal, Xiaoping Jin, Ashok K Gupta, Yong Ben, Noah M Hahn
Importance: The data reported herein were accepted for assessment by the US Food and Drug Administration for Biologics License Application under priority review to establish the clinical benefit of durvalumab as second-line therapy for locally advanced or metastatic urothelial carcinoma (UC), resulting in its recent US approval. Objective: To report a planned update of the safety and efficacy of durvalumab in patients with locally advanced/metastatic UC. Design, Setting, and Participants: This is an ongoing phase 1/2 open-label study of 191 adult patients with histologically or cytologically confirmed locally advanced/metastatic UC whose disease had progressed on, were ineligible for, or refused prior chemotherapy from 60 sites in 9 countries as reported herein...
August 17, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/28817737/myc-mediates-cancer-stem-like-cells-and-emt-changes-in-triple-negative-breast-cancers-cells
#4
Shuping Yin, Vino T Cheryan, Liping Xu, Arun K Rishi, Kaladhar B Reddy
Women with triple negative breast cancer (TNBC) have poor prognosis compared to other breast cancer subtypes. There were several reports indicating racial disparity in breast cancer outcomes between African American (AA) and European American (EA) women. For example, the mortality rates of AA breast cancer patients were three times higher than of EA patients, even though, the incidence is lower in AA women. Our in vitro studies indicate that cancer stem-like cells (CSCs) derived from AA TNBC cell lines have significantly higher self-renewal potential (mammosphere formation) than CSCs derived from EA cell lines...
2017: PloS One
https://www.readbyqxmd.com/read/28817730/new-approach-to-generating-insights-for-aging-research-based-on-literature-mining-and-knowledge-integration
#5
Yeondae Kwon, Yukikazu Natori, Masaru Tanokura
The proportion of the elderly population in most countries worldwide is increasing dramatically. Therefore, social interest in the fields of health, longevity, and anti-aging has been increasing as well. However, the basic research results obtained from a reductionist approach in biology and a bioinformatic approach in genome science have limited usefulness for generating insights on future health, longevity, and anti-aging-related research on a case by case basis. We propose a new approach that uses our literature mining technique and bioinformatics, which lead to a better perspective on research trends by providing an expanded knowledge base to work from...
2017: PloS One
https://www.readbyqxmd.com/read/28817722/nicotinamide-alone-accelerates-the-conversion-of-mouse-embryonic-stem-cells-into-mature-neuronal-populations
#6
Síle M Griffin, Mark R Pickard, Rowan P Orme, Clive P Hawkins, Adrian C Williams, Rosemary A Fricker
INTRODUCTION: Vitamin B3 has been shown to play an important role during embryogenesis. Specifically, there is growing evidence that nicotinamide, the biologically active form of vitamin B3, plays a critical role as a morphogen in the differentiation of stem cells to mature cell phenotypes, including those of the central nervous system (CNS). Detailed knowledge of the action of small molecules during neuronal differentiation is not only critical for uncovering mechanisms underlying lineage-specification, but also to establish more effective differentiation protocols to obtain clinically relevant cells for regenerative therapies for neurodegenerative conditions such as Huntington's disease (HD)...
2017: PloS One
https://www.readbyqxmd.com/read/28817714/insights-into-secular-trends-of-respiratory-tuberculosis-the-20th-century-maltese-experience
#7
Lianne Tripp, Larry A Sawchuk
Over half a century ago, McKeown and colleagues proposed that economics was a major contributor to the decline of infectious diseases, including respiratory tuberculosis, during the 19th and 20th centuries. Since then, there is no consensus among researchers as to the factors responsible for the mortality decline. Using the case study of the islands of Malta and Gozo, we examine the relationship of economics, in particular, the cost of living (Fisher index) and its relationship to the secular trends of tuberculosis mortality...
2017: PloS One
https://www.readbyqxmd.com/read/28817687/morphologic-phenotypic-and-transcriptomic-characterization-of-classically-and-alternatively-activated-canine-blood-derived-macrophages-in-vitro
#8
Franziska Heinrich, Annika Lehmbecker, Barbara B Raddatz, Kristel Kegler, Andrea Tipold, Veronika M Stein, Arno Kalkuhl, Ulrich Deschl, Wolfgang Baumgärtner, Reiner Ulrich, Ingo Spitzbarth
Macrophages are a heterogeneous cell population playing a pivotal role in tissue homeostasis and inflammation, and their phenotype strongly depends on the micromilieu. Despite its increasing importance as a translational animal model for human diseases, there is a considerable gap of knowledge with respect to macrophage polarization in dogs. The present study comprehensively investigated the morphologic, phenotypic, and transcriptomic characteristics of unstimulated (M0), M1- (GM-CSF, LPS, IFNγ-stimulated) and M2- (M-CSF, IL-4-stimulated)-polarized canine blood-derived macrophages in vitro...
2017: PloS One
https://www.readbyqxmd.com/read/28817685/clinical-implications-of-carcinoembryonic-antigen-distribution-in-serum-exosomal-fraction-measurement-by-elisa
#9
Shozo Yokoyama, Akihiro Takeuchi, Shunsuke Yamaguchi, Yasuyuki Mitani, Takashi Watanabe, Kenji Matsuda, Tsukasa Hotta, John E Shively, Hiroki Yamaue
BACKGROUND: Serum exosomal proteins have great potential as indicators of disease status in cancer, inflammatory or metabolic diseases. The association of a fraction of various serum proteins such as carcinoembryonic antigen (CEA) with circulating exosomes has been debated. The establishment of a method to measure the exosomal fraction of such proteins might help resolve this controversy. The use of enzyme-linked immunosorbent assays (ELISAs) to measure serum exosomal molecules, for example CEA, is rare in research laboratories and totally absent in clinical biology...
2017: PloS One
https://www.readbyqxmd.com/read/28817681/pressure-in-isochoric-systems-containing-aqueous-solutions-at-subzero-centigrade-temperatures
#10
Gideon Ukpai, Gabriel Năstase, Alexandru Șerban, Boris Rubinsky
OBJECTIVE: Preservation of biological materials at subzero Centigrade temperatures, cryopreservation, is important for the field of tissue engineering and organ transplantation. Our group is studying the use of isochoric (constant volume) systems of aqueous solution for cryopreservation. Previous studies measured the pressure-temperature relations in aqueous isochoric systems in the temperature range from 0°C to - 20°C. The goal of this study is to expand the pressure-temperature measurement beyond the range reported in previous publications...
2017: PloS One
https://www.readbyqxmd.com/read/28817680/human-alpha-defensin-5-is-a-candidate-biomarker-to-delineate-inflammatory-bowel-disease
#11
Amanda D Williams, Olga Y Korolkova, Amos M Sakwe, Timothy M Geiger, Samuel D James, Roberta L Muldoon, Alan J Herline, J Shawn Goodwin, Michael G Izban, Mary K Washington, Duane T Smoot, Billy R Ballard, Maria Gazouli, Amosy E M'Koma
Inability to distinguish Crohn's colitis from ulcerative colitis leads to the diagnosis of indeterminate colitis. This greatly effects medical and surgical care of the patient because treatments for the two diseases vary. Approximately 30 percent of inflammatory bowel disease patients cannot be accurately diagnosed, increasing their risk of inappropriate treatment. We sought to determine whether transcriptomic patterns could be used to develop diagnostic biomarker(s) to delineate inflammatory bowel disease more accurately...
2017: PloS One
https://www.readbyqxmd.com/read/28817679/increased-half-life-and-enhanced-potency-of-fc-modified-human-pcsk9-monoclonal-antibodies-in-primates
#12
Yijun Shen, Hua Li, Li Zhao, Gang Li, Ben Chen, Qingsong Guo, Bei Gao, Jinsong Wu, Tong Yang, Li Jin, Yong Su
Blocking proprotein convertase subtilisin kexin type 9 (PCSK9) binding to low-density lipoprotein receptor (LDLR) can profoundly lower plasma LDL levels. Two anti-PCKS9 monoclonal antibodies (mAbs), alirocumab and evolocumab, were approved by the FDA in 2015. The recommended dose is 75 mg to 150 mg every two weeks for alirocumab and 140mg every two weeks or 420 mg once a month for evolocumab. This study attempted to improve the pharmacokinetic properties of F0016A, an IgG1 anti-PCKS9 mAb, to generate biologically superior molecules...
2017: PloS One
https://www.readbyqxmd.com/read/28817664/gold-nanoparticles-partition-to-and-increase-the-activity-of-glucose-6-phosphatase-in-a-synthetic-phospholipid-membrane-system
#13
Tyson J MacCormack, Amanda M Rundle, Michael Malek, Abhilash Raveendran, Maria-Victoria Meli
Engineered nanomaterials can alter the structure and/or function of biological membranes and membrane proteins but the underlying mechanisms remain unclear. We addressed this using a Langmuir phospholipid monolayer containing an active transmembrane protein, glucose-6-phosphatase (G6Pase). Gold nanoparticles (nAu) with varying ligand shell composition and hydrophobicity were synthesized, and their partitioning in the membrane and effects on protein activity characterized. nAu incorporation did not alter the macroscopic properties of the membrane...
2017: PloS One
https://www.readbyqxmd.com/read/28817648/screening-for-chikungunya-virus-infection-in-aged-people-development-and-internal-validation-of-a-new-score
#14
Lidvine Godaert, Seendy Bartholet, Fatiha Najioullah, Maxime Hentzien, Jean-Luc Fanon, Raymond Césaire, Moustapha Dramé
BACKGROUND: This study aimed to derive and validate a score for Chikungunya virus (CHIKV) infection screening in old people admitted to acute care units. METHODS: This study was performed in the Martinique University Hospitals from retrospective cases. Patients were aged 65+, admitted to acute care units for suspected CHIKV infection in 2014, with biological testing using Reverse Transcription Polymerase Chain Reaction (RT-PCR). RT-PCR was used as the gold standard...
2017: PloS One
https://www.readbyqxmd.com/read/28817636/uncovering-robust-patterns-of-microrna-co-expression-across-cancers-using-bayesian-relevance-networks
#15
Parameswaran Ramachandran, Daniel Sánchez-Taltavull, Theodore J Perkins
Co-expression networks have long been used as a tool for investigating the molecular circuitry governing biological systems. However, most algorithms for constructing co-expression networks were developed in the microarray era, before high-throughput sequencing-with its unique statistical properties-became the norm for expression measurement. Here we develop Bayesian Relevance Networks, an algorithm that uses Bayesian reasoning about expression levels to account for the differing levels of uncertainty in expression measurements between highly- and lowly-expressed entities, and between samples with different sequencing depths...
2017: PloS One
https://www.readbyqxmd.com/read/28817630/pet-snakes-illegally-marketed-in-brazil-climatic-viability-and-establishment-risk
#16
Érica Fonseca, Mirco Solé, Dennis Rödder, Paulo de Marco
Invasive species are one among many threats to biodiversity. Brazil has been spared, generically, of several destructive invasive species. Reports of invasive snakes' populations are nonexistent, but the illegal pet trade might change this scenario. Despite the Brazilian laws forbid to import most animals, illegal trade is frequently observed and propagules are found in the wild. The high species richness within Brazilian biomes and accelerated fragmentation of natural reserves are a critical factors facilitating successful invasion...
2017: PloS One
https://www.readbyqxmd.com/read/28817608/data-driven-coarse-graining-of-large-biomolecular-structures
#17
Yi-Ling Chen, Michael Habeck
Advances in experimental and computational techniques allow us to study the structure and dynamics of large biomolecular assemblies at increasingly higher resolution. However, with increasing structural detail it can be challenging to unravel the mechanism underlying the function of molecular machines. One reason is that atomistic simulations become computationally prohibitive. Moreover it is difficult to rationalize the functional mechanism of systems composed of tens of thousands to millions of atoms by following each atom's movements...
2017: PloS One
https://www.readbyqxmd.com/read/28817602/exploring-the-potential-of-a-structural-alphabet-based-tool-for-mining-multiple-target-conformations-and-target-flexibility-insight
#18
Leslie Regad, Jean-Baptiste Chéron, Dhoha Triki, Caroline Senac, Delphine Flatters, Anne-Claude Camproux
Protein flexibility is often implied in binding with different partners and is essential for protein function. The growing number of macromolecular structures in the Protein Data Bank entries and their redundancy has become a major source of structural knowledge of the protein universe. The analysis of structural variability through available redundant structures of a target, called multiple target conformations (MTC), obtained using experimental or modeling methods and under different biological conditions or different sources is one way to explore protein flexibility...
2017: PloS One
https://www.readbyqxmd.com/read/28817597/a-unified-censored-normal-regression-model-for-qpcr-differential-gene-expression-analysis
#19
Peter Pipelers, Lieven Clement, Matthijs Vynck, Jan Hellemans, Jo Vandesompele, Olivier Thas
Reverse transcription quantitative polymerase chain reaction (RT-qPCR) is considered as the gold standard for accurate, sensitive, and fast measurement of gene expression. Prior to downstream statistical analysis, RT-qPCR fluorescence amplification curves are summarized into one single value, the quantification cycle (Cq). When RT-qPCR does not reach the limit of detection, the Cq is labeled as "undetermined". Current state of the art qPCR data analysis pipelines acknowledge the importance of normalization for removing non-biological sample to sample variation in the Cq values...
2017: PloS One
https://www.readbyqxmd.com/read/28817593/a-systematic-review-of-context-bias-in-invasion-biology
#20
Robert J Warren, Joshua R King, Charlene Tarsa, Brian Haas, Jeremy Henderson
The language that scientists use to frame biological invasions may reveal inherent bias-including how data are interpreted. A frequent critique of invasion biology is the use of value-laden language that may indicate context bias. Here we use a systematic study of language and interpretation in papers drawn from invasion biology to evaluate whether there is a link between the framing of papers and the interpretation of results. We also examine any trends in context bias in biological invasion research. We examined 651 peer-reviewed invasive species competition studies and implemented a rigorous systematic review to examine bias in the presentation and interpretation of native and invasive competition in invasion biology...
2017: PloS One
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