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https://www.readbyqxmd.com/read/27915250/importance-of-fumarate-and-nitrate-reduction-regulatory-protein-for-proliferation-for-intestinal-proliferation-of-vibrio-vulnificus
#1
Takehiro Kado, Takashige Kashimoto, Kohei Yamazaki, Shunji Ueno
The sepsis caused by Vibrio vulnificus is characterized by an average incubation period of 26 hours and a high mortality rate exceeding 50%. The fast growth and dissemination of V. vulnificus in vivo lead to poor clinical outcomes in patients. Therefore, elucidation of the proliferation mechanisms of this organism in vivo may lead to development of an effective therapeutic strategy. In this study, we focused on the low oxygen concentration in the intestinal milieu because of its drastic difference from that in the air...
December 2, 2016: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/27915208/maximizing-the-impact-of-physiologically-based-oral-absorption-modeling-and-simulation
#2
John I Chung, Ron C Kelly, Jan Wahlstrom, Benjamin Wu, Tian Wu, Fernando Alvarez-Nunez
The challenge of bringing innovative medicines to patients in combination with intense competition within the pharmaceutical industry have induced companies to develop quality medicines more efficiently and cost-effectively. State-of-the art approaches to advance drug development have never been so urgent. One such approach that has been gaining traction within the industry is the application of modeling and simulation. In this commentary, the benefits of physiologically-based oral absorption (PBOA) modeling and simulation in drug development are highlighted and suggestions for maximizing its impact are provided...
November 30, 2016: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27915139/impairment-of-fetal-hematopoietic-stem-cell-function-in-the-absence-of-fancd2
#3
Sakiko Suzuki, Ronny R Racine, Nathan A Manalo, Sharon B Cantor, Glen D Raffel
Fanconi Anemia (FA), results from mutations in genes necessary for DNA damage repair and often leads to progressive bone marrow failure. Although the exhaustion of the bone marrow leads to cytopenias in FA patients as they age, evidence from human FA and mouse model fetal livers suggests hematopoietic defects originate in utero which may lead to deficient seeding of the bone marrow. To address this possibility, we examined the consequences of loss of Fancd2, a central component of the FA pathway. Examination of E14...
November 30, 2016: Experimental Hematology
https://www.readbyqxmd.com/read/27915093/discoidin-domain-receptor-1-kinase-activity-is-required-for-regulating-collagen-iv-synthesis
#4
Corina M Borza, Yan Su, Truc-Linh Tran, Ling Yu, Nick Steyns, Kayla J Temple, Marcin J Skwark, Jens Meiler, Craig W Lindsley, Brennan R Hicks, Birgit Leitinger, Roy Zent, Ambra Pozzi
Discoidin domain receptor 1 (DDR1) is a receptor tyrosine kinase that binds to and is activated by collagens. DDR1 expression increases following kidney injury and accumulating evidence suggests that it contributes to the progression of injury. To this end, deletion of DDR1 is beneficial in ameliorating kidney injury induced by angiotensin infusion, unilateral ureteral obstruction, or nephrotoxic nephritis. Most of the beneficial effects observed in the DDR1-null mice are attributed to reduced inflammatory cell infiltration to the site of injury, suggesting that DDR1 plays a pro-inflammatory effect...
November 30, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27915047/physical-and-functional-interaction-of-snapin-with-cav1-3-calcium-channel-impacts-channel-protein-trafficking-in-atrial-myocytes
#5
Xiao-Li Sun, Ju-Fang Yuan, Tao Jin, Xiao-Qing Cheng, Qiang Wang, Jia Guo, Wei Zhang, Yin Zhang, Ling Lu, Zhao Zhang
The L-type Ca(2+) channel (LTCC) Cav1.3 playsa critical role in generating electrical activity in atrial myocytes and cardiac pacemaker cells. However, the molecular and functional basis of Cav1.3 modulation in atrial myocytes has not yet been fully understood. By using the yeast two-hybrid system (Y2H), a Cav1.3-associated protein was screened, which was identified as Snapin. Physical interaction and co-localization between Snapin and Cav1.3 were then confirmed in both theheterologous expression system and mouse atrial myocytes...
November 30, 2016: Cellular Signalling
https://www.readbyqxmd.com/read/27914974/nonmedical-use-of-prescription-opioids-and-heroin-use-among-adolescents-involved-in-competitive-sports
#6
Philip Veliz, Carol J Boyd, Sean Esteban McCabe
PURPOSE: Examine the past-year prevalence of nonmedical use of prescription opioids (NUPOs), heroin use, and the concurrent NUPO and heroin in a sample of 12th graders involved in 16 different sports. METHODS: A secondary analysis of nationally representative data from nine cohorts (2006-2014) of the Monitoring the Future study (n = 21,557). RESULTS: No differences were found between 12th graders who participated in at least one competitive sport and nonparticipants with respect to past-year NUPO, heroin use, and concurrent NUPO and heroin use...
November 30, 2016: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/27914927/novel-rna-viruses-producing-simultaneous-covert-infections-in-ceratitis-capitata-correlations-between-viral-titers-and-host-fitness-and-implications-for-sit-programs
#7
Angel Llopis-Giménez, Rosa Maria González, Anabel Millán-Leiva, Marta Catalá, Elena Llacer, Alberto Urbaneja, Salvador Herrero
The Mediterranean fruit fly (medfly), Ceratitis capitata is a highly polyphagous pest, which infests multiple species of fruits and vegetables worldwide. In addition to the traditional control with chemical insecticides, sterile insect technique (SIT) has been implemented in integrated programs worldwide, and has become an essential measure for the control of this pest. A key issue for SIT is to release sterile males that are sufficiently competitive with males from the wild population. Using sequence information available in public databases, three novel picornaviruses infecting medflies were discovered and named as C...
November 30, 2016: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/27914918/epigenetic-game-theory-how-to-compute-the-epigenetic-control-of-maternal-to-zygotic-transition
#8
REVIEW
Qian Wang, Kirk Gosik, Sujuan Xing, Libo Jiang, Lidan Sun, Vernon M Chinchilli, Rongling Wu
Epigenetic reprogramming is thought to play a critical role in maintaining the normal development of embryos. How the methylation state of paternal and maternal genomes regulates embryogenesis depends on the interaction and coordination of the gametes of two sexes. While there is abundant research in exploring the epigenetic interactions of sperms and oocytes, a knowledge gap exists in the mechanistic quantitation of these interactions and their impact on embryo development. This review aims at formulating a modeling framework to address this gap through the integration and synthesis of evolutionary game theory and the latest discoveries of the epigenetic control of embryo development by next-generation sequencing...
November 9, 2016: Physics of Life Reviews
https://www.readbyqxmd.com/read/27914879/what-can-animal-research-tell-us-about-the-link-between-androgens-and-social-competition-in-humans
#9
REVIEW
Matthew J Fuxjager, Brian C Trainor, Catherine A Marler
The relationship between androgenic hormones, like testosterone (T), and aggression is extensively studied in human populations. Yet, while this work has illuminated a variety of principals regarding the behavioral and phenotypic effects of T, it is also hindered by inherent limitations of performing research on people. In these instances, animal research can be used to gain further insight into the complex mechanisms by which T influences aggression. Here, we explore recent studies on T and aggression in numerous vertebrate species, although we focus primarily on males and on a New World rodent called the California mouse (Peromyscus californicus)...
November 30, 2016: Hormones and Behavior
https://www.readbyqxmd.com/read/27914800/discovery-of-a-new-isomannide-based-peptidomimetic-synthetized-by-ugi-multicomponent-reaction-as-human-tissue-kallikrein-1-inhibitor
#10
Thalita G Barros, Jorge A N Santos, Bruno E G de Souza, Ana Carolina R Sodero, Alessandra M T de Souza, Dayane P da Silva, Carlos Rangel Rodrigues, Sergio Pinheiro, Luiza R S Dias, Bárbara Abrahim-Vieira, Luciano Puzer, Estela M F Muri
Human kallikrein 1 (KLK1) is the most extensively studied member of this family and plays a major role in inflammation processes. From Ugi multicomponent reactions, isomannide-based peptidomimetic 10 and 13 where synthesized and showed low micromolar values of IC50 for KLK1 The most active compound (10) presented competitive mechanism, with three structural modifications important to interact with active site residues which corroborates its KLK1 inhibition. Finally, the most active compound also showed good ADMET profile, which indicates compound 10 as a potential hit in the search for new KLK1 inhibitors with low side effects...
November 18, 2016: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/27914454/-suppressor-factor-of-neutrophils-a-short-story-of-a-long-term-misconception
#11
I A Linge, E V Kondratieva, T K Kondratieva, V A Makarov, V I Polshakov, O Yu Savelyev, A S Apt
A large body of evidence obtained during the last decade has demonstrated that neutrophils suppress T cell proliferation in different models of inflammation and cell interaction. The commonly used method for assessing cell proliferation and proliferation inhibition is measuring [3H]thymidine incorporation into cells. Earlier, we observed inhibition of [3H]thymidine uptake in experiments on neutrophil-mediated regulation of T cell response in tuberculosis immunity. Here, we used different types of proliferating cells to analyze the nature of the soluble "neutrophil factor" by a variety of methods (dialysis, HPLC, mass spectrometry, and NMR) and unambiguously demonstrated that neutrophils do not synthesize a specific factor inhibiting cell proliferation, but secrete high concentrations of extracellular thymidine that competitively inhibit [3H]thymidine incorporation...
November 2016: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/27914349/effects-of-clay-minerals-hydroxides-and-timing-of-dissolved-organic-matter-addition-on-the-competitive-sorption-of-copper-nickel-and-zinc-a-column-experiment
#12
Yasser Refaey, Boris Jansen, John R Parsons, Pim de Voogt, Simone Bagnis, Adriaan Markus, Abdel-Hamid El-Shater, Abdel-Aziz El-Haddad, Karsten Kalbitz
Infiltration of heavy metal (HM) polluted wastewater can seriously compromise soil and groundwater quality. Interactions between mineral soil components (e.g. clay minerals) and dissolved organic matter (DOM) play a crucial role in determining HM mobility in soils. In this study, the influence of the timing of addition of DOM, i.e. concurrent with or prior to HMs, on HM mobility was explored in a set of continuous flow column experiments using well defined natural soil samples amended with goethite, birnessite and/or smectite...
November 30, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27914258/centralised-decentralised-or-hybrid-sanitation-systems-economic-evaluation-under-urban-development-uncertainty-and-phased-expansion
#13
Ivar Roefs, Brendo Meulman, Jan H G Vreeburg, Marc Spiller
Sanitation systems are built to be robust, that is, they are dimensioned to cope with population growth and other variability that occurs throughout their lifetime. It was recently shown that building sanitation systems in phases is more cost effective than one robust design. This phasing can take place by building small autonomous decentralised units that operate closer to the actual demand. Research has shown that variability and uncertainty in urban development does affect the cost effectiveness of this approach...
November 23, 2016: Water Research
https://www.readbyqxmd.com/read/27914116/so-it-is-so-it-shall-be-group-regularities-license-children-s-prescriptive-judgments
#14
Steven O Roberts, Susan A Gelman, Arnold K Ho
When do descriptive regularities (what characteristics individuals have) become prescriptive norms (what characteristics individuals should have)? We examined children's (4-13 years) and adults' use of group regularities to make prescriptive judgments, employing novel groups (Hibbles and Glerks) that engaged in morally neutral behaviors (e.g., eating different kinds of berries). Participants were introduced to conforming or non-conforming individuals (e.g., a Hibble who ate berries more typical of a Glerk)...
December 3, 2016: Cognitive Science
https://www.readbyqxmd.com/read/27914073/competition-for-iron-between-host-and-pathogen-a-structural-case-study-on-helicobacter-pylori
#15
Wei Xia
Helicobacter pylori (H. pylori) is a highly successful bacterial pathogen, which colonizes the stomach of more than half of the world's population. To colonize and survive in such an acidic and inhospitable niche, H. pylori cells have evolved complex mechanisms to acquire nutrients from human hosts, including iron, an essential nutrient for both the pathogens and host cells. However, human cells also utilize diverse strategies in withholding of irons to prevent the bacterial outgrowth. The competition for iron is the central battlefield between pathogen and host...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27914058/osprey-predicts-resistance-mutations-using-positive-and-negative-computational-protein-design
#16
Adegoke Ojewole, Anna Lowegard, Pablo Gainza, Stephanie M Reeve, Ivelin Georgiev, Amy C Anderson, Bruce R Donald
Drug resistance in protein targets is an increasingly common phenomenon that reduces the efficacy of both existing and new antibiotics. However, knowledge of future resistance mutations during pre-clinical phases of drug development would enable the design of novel antibiotics that are robust against not only known resistant mutants, but also against those that have not yet been clinically observed. Computational structure-based protein design (CSPD) is a transformative field that enables the prediction of protein sequences with desired biochemical properties such as binding affinity and specificity to a target...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27914016/ms-ms-assisted-design-of-sequence-controlled-synthetic-polymers-for-improved-reading-of-encoded-information
#17
Laurence Charles, Gianni Cavallo, Valérie Monnier, Laurence Oswald, Roza Szweda, Jean-François Lutz
In order to improve their MS/MS sequencing, structure of sequence-controlled synthetic polymers can be optimized based on considerations regarding their fragmentation behavior in collision-induced dissociation conditions, as demonstrated here for two digitally encoded polymer families. In poly(triazole amide)s, the main dissociation route proceeded via cleavage of the amide bond in each monomer, hence allowing the chains to be safely sequenced. However, a competitive cleavage of an ether bond in a tri(ethylene glycol) spacer placed between each coding moiety complicated MS/MS spectra while not bringing new structural information...
December 2, 2016: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/27913923/actn3-x-allele-carriers-had-greater-levels-of-muscle-damage-during-a-half-ironman
#18
Juan Del Coso, Juan José Salinero, Beatriz Lara, César Gallo-Salazar, Francisco Areces, Carlos Puente, David Herrero
PURPOSE: Alpha-actinin-3, encoded by the ACTN3 gene, is an actin-binding protein with an important role in myofibril contraction and muscle force output. In humans, there is a relatively common deficiency of the α-actinin-3 due to homozygosity in a polymorphism of the ACTN3 gene (R577X, rs1815739), that has been related to decreased resistance to strain during voluntary muscle contractions. The purpose of this study was to investigate the influence of the ACTN3 genotype on the level of exercise-induced muscle damage attained by 23 experienced triathletes during an official half-ironman competition...
December 2, 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27913817/the-contribution-of-response-conflict-multisensory-integration-and-body-mediated-attention-to-the-crossmodal-congruency-effect
#19
Francesco Marini, Daniele Romano, Angelo Maravita
The crossmodal congruency task is a consolidated paradigm for investigating interactions between vision and touch. In this task, participants judge the elevation of a tactile target stimulus while ignoring a visual distracter stimulus that may occur at a congruent or incongruent elevation, thus engendering a measure of visuo-tactile interference (crossmodal congruency effect, CCE). The CCE reflects perceptual, attentional, and response-related factors, but their respective roles and interactions have not been set out yet...
December 2, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27913726/competitive-binding-between-seryl-trna-synthetase-yy1-complex-and-nfkb1-at-the-distal-segment-results-in-differential-regulation-of-human-vegfa-promoter-activity-during-angiogenesis
#20
Chuan-Yang Fu, Po-Chun Wang, Huai-Jen Tsai
Vascular endothelial growth factor (VEGF) plays a pivotal role in angiogenesis. Previous studies focused on transcriptional regulation modulated by proximal upstream cis-regulatory elements (CREs) of the human vegfa promoter. However, we hypothesized that distal upstream CREs may also be involved in controlling vegfa transcription. In this study, we found that the catalytic domain of Seryl-tRNA synthetase (SerRS) interacted with transcription factor Yin Yang 1 (YY1) to form a SerRS/YY1 complex that negatively controls vegfa promoter activity through binding distal CREs at -4654 to -4623 of vegfa Particularly, we demonstrated that the -4654 to -4623 segment, which predominantly controls vegfa promoter activity, is involved in competitive binding between SerRS/YY1 complex and NFKB1...
December 1, 2016: Nucleic Acids Research
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