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https://www.readbyqxmd.com/read/28938018/genome-wide-identification-of-bacterial-plant-colonization-genes
#1
Benjamin J Cole, Meghan E Feltcher, Robert J Waters, Kelly M Wetmore, Tatiana S Mucyn, Elizabeth M Ryan, Gaoyan Wang, Sabah Ul-Hasan, Meredith McDonald, Yasuo Yoshikuni, Rex R Malmstrom, Adam M Deutschbauer, Jeffery L Dangl, Axel Visel
Diverse soil-resident bacteria can contribute to plant growth and health, but the molecular mechanisms enabling them to effectively colonize their plant hosts remain poorly understood. We used randomly barcoded transposon mutagenesis sequencing (RB-TnSeq) in Pseudomonas simiae, a model root-colonizing bacterium, to establish a genome-wide map of bacterial genes required for colonization of the Arabidopsis thaliana root system. We identified 115 genes (2% of all P. simiae genes) with functions that are required for maximal competitive colonization of the root system...
September 22, 2017: PLoS Biology
https://www.readbyqxmd.com/read/28937450/parenting-to-reduce-child-screen-time-a-feasibility-pilot-study
#2
Wesley Sanders, Justin Parent, Rex Forehand
OBJECTIVE: Excessive screen time has been associated with a multitude of child health problems. This pilot study examined the feasibility and preliminary outcome of a novel 1-session intervention designed to help parents reduce their child's screen time. METHODS: Thirty-nine parents of 5- to 12-year-old children were randomized to the intervention (a combined didactics and hands-on approach focused on technology-specific parenting) or waitlist control group. RESULTS: The findings suggested that a sample could be recruited in a reasonable time (6 wk) at a reasonable cost, randomized, and retained at 6 weeks postintervention...
September 19, 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28932872/self-efficacy-and-barriers-to-disaster-evacuation-in-hong-kong
#3
Elizabeth A Newnham, Satchit Balsari, Rex Pui Kin Lam, Shraddha Kashyap, Phuong Pham, Emily Y Y Chan, Kaylie Patrick, Jennifer Leaning
OBJECTIVES: To investigate specific challenges to Hong Kong's capacity for effective disaster response, we assessed perceived barriers to evacuation and citizens' self-efficacy. METHODS: Global positioning system software was used to determine random sampling locations across Hong Kong, weighted by population density. The resulting sample of 1023 participants (46.5% female, mean age 40.74 years) were invited to complete questionnaires on emergency preparedness, barriers to evacuation and self-efficacy...
September 20, 2017: International Journal of Public Health
https://www.readbyqxmd.com/read/28922765/snrk1-phosphorylation-of-fusca3-positively-regulates-embryogenesis-seed-yield-and-plant-growth-at-high-temperature-in-arabidopsis
#4
Aaron Chan, Carina Carianopol, Allen Yi-Lun Tsai, Kresanth Varathanajah, Rex Shun Chiu, Sonia Gazzarrini
The transcription factor FUSCA3 (FUS3) acts as a major regulator of seed maturation in Arabidopsis. FUS3 is phosphorylated by the SnRK1 catalytic subunit AKIN10/SnRK1α1, which belongs to a conserved eukaryotic kinase complex involved in energy homeostasis. Here we show that AKIN10 and FUS3 share overlapping expression patterns during embryogenesis, and that FUS3 is phosphorylated by AKIN10 in embryo cell extracts. To understand the role of FUS3 phosphorylation, we generated fus3-3 plants carrying FUS3 phosphorylation-null (FUS3S>A) and phosphorylation-mimic (FUS3S>D) variants...
July 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28917308/prevalence-of-pentatrichomonas-hominis-infections-in-six-farmed-wildlife-species-in-jilin-china
#5
Xianhe Li, Jianhua Li, Xichen Zhang, Zhengtao Yang, Ju Yang, Pengtao Gong
Pentatrichomonas hominis is an anaerobic flagellated protozoan that primarily parasitizes the gastrointestinal tract and is a conditional pathogen. It has an extensive host range and is well known as a potential causative agent of zoonotic disease. The objective of this study was to provide the first findings of the prevalence of P. hominis in six farmed wildlife species, sika deer (S.D.), Rex rabbits (R.R.), blue foxes (B.F.), silver foxes (S.F.), raccoon dogs (R.D.) and minks (M.), that are commercially important in Jilin Province, China...
September 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28890241/manual-and-expert-annotation-of-the-nearly-complete-genome-sequence-of-staphylococcus-sciuri-strain-atcc-29059-a-reference-for-the-oxidase-positive-staphylococci-that-supports-the-atypical-phenotypic-features-of-the-species-group
#6
Eugene Christo-Foroux, Tatiana Vallaeys, Valentin Loux, Elie Dassa, Josef Deutscher, Cécile Wandersman, Aurélien Livernois, Chloe Hot, Alexis Criscuolo, Catherine Dauga, Dominique Clermont, Olivier Chesneau
Staphylococcus sciuri is considered to be one of the most ancestral species in the natural history of the Staphylococcus genus that consists of 48 validly described species. It belongs to the basal group of oxidase-positive and novobiocin-resistant staphylococci that diverged from macrococci approximately 250 million years ago. Contrary to other groups, the S. sciuri species group has not developed host-specific colonization strategies. Genome analysis of S. sciuri ATCC 29059 provides here the first genetic basis for atypical traits that would support the switch between the free-living style and the infective state in animals and humans...
August 24, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28888660/time-for-a-change-in-how-new-antibiotics-are-reimbursed-development-of-an-insurance-framework-for-funding-new-antibiotics-based-on-a-policy-of-risk-mitigation
#7
Adrian Towse, Christopher K Hoyle, Jonathan Goodall, Mark Hirsch, Jorge Mestre-Ferrandiz, John H Rex
Healthcare systems depend on the availability of new antibiotics. However, there is a lack of treatments for infections caused by multidrug resistant (MDR) pathogens and a weak development pipeline of new therapies. One core challenge to the development of new antibiotics targeting MDR pathogens is that expected revenues are insufficient to drive long-term investment. In the USA and Europe, financial incentives have focussed on supporting R&D, reducing regulatory burden, and extending market exclusivity. Using resistance data to estimate global revenues, we demonstrate that the combined effects of these incentives are unlikely to rekindle investment in antibiotics...
August 5, 2017: Health Policy
https://www.readbyqxmd.com/read/28886644/knotting-probability-of-self-avoiding-polygons-under-a-topological-constraint
#8
Erica Uehara, Tetsuo Deguchi
We define the knotting probability of a knot K by the probability for a random polygon or self-avoiding polygon (SAP) of N segments having the knot type K. We show fundamental and generic properties of the knotting probability particularly its dependence on the excluded volume. We investigate them for the SAP consisting of hard cylindrical segments of unit length and radius rex. For various prime and composite knots, we numerically show that a compact formula describes the knotting probabilities for the cylindrical SAP as a function of segment number N and radius rex...
September 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28886346/in-memoriam-lawrence-lumeng-md-researcher-clinician-leader-mentor-family-man-and-friend
#9
EDITORIAL
Naga P Chalasani, David W Crabb, Douglas K Rex
No abstract text is available yet for this article.
September 5, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28884249/cdocker-and-formula-see-text-dynamics-for-prospective-prediction-in-d3r-grand-challenge-2
#10
Xinqiang Ding, Ryan L Hayes, Jonah Z Vilseck, Murchtricia K Charles, Charles L Brooks
The opportunity to prospectively predict ligand bound poses and free energies of binding to the Farnesoid X Receptor in the D3R Grand Challenge 2 provided a useful exercise to evaluate CHARMM based docking (CDOCKER) and [Formula: see text]-dynamics methodologies for use in "real-world" applications in computer aided drug design. In addition to measuring their current performance, several recent methodological developments have been analyzed retrospectively to highlight best procedural practices in future applications...
September 7, 2017: Journal of Computer-aided Molecular Design
https://www.readbyqxmd.com/read/28881833/lncrna-h19-mediates-bmp9-induced-osteogenic-differentiation-of-mesenchymal-stem-cells-mscs-through-notch-signaling
#11
Junyi Liao, Xinyi Yu, Xue Hu, Jiaming Fan, Jing Wang, Zhicai Zhang, Chen Zhao, Zongyue Zeng, Yi Shu, Ruyi Zhang, Shujuan Yan, Yasha Li, Wenwen Zhang, Jing Cui, Chao Ma, Li Li, Yichun Yu, Tingting Wu, Xingye Wu, Jiayan Lei, Jia Wang, Chao Yang, Ke Wu, Ying Wu, Jun Tang, Bai-Cheng He, Zhong-Liang Deng, Hue H Luu, Rex C Haydon, Russell R Reid, Michael J Lee, Jennifer Moriatis Wolf, Wei Huang, Tong-Chuan He
Mesenchymal stem cells (MSCs) are multipotent progenitor cells that can undergo self-renewal and differentiate into multiple lineages. Osteogenic differentiation from MSCs is a well-orchestrated process and regulated by multiple signaling pathways. We previously demonstrated that BMP9 is one of the most potent osteogenic factors. However, molecular mechanism through which BMP9 governs osteoblastic differentiation remains to be fully understood. Increasing evidence indicates noncoding RNAs (ncRNAs) may play important regulatory roles in many physiological and/or pathologic processes...
August 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28880332/a-technique-to-reduce-incidence-of-opaque-bubble-layer-formation-during-lasik-flap-creation-using-the-visumax-femtosecond-laser
#12
Ningling Wu, Joseph G Christenbury, Jon G Dishler, Tahir Kansu Bozkurt, Daniel Duel, Lijun Zhang, D Rex Hamilton
PURPOSE: To identify risk factors for opaque bubble layer (OBL) formation and compare the incidence of OBL using a cone modification technique versus the original technique for LASIK flap creation using the VisuMax laser (Carl Zeiss Meditec, Jena, Germany). METHODS: This retrospective study examined videos of flap creation using the VisuMax laser to identify OBL occurrence. Eyes were divided into three groups: eyes where OBL occurred using the original technique (OBL group), eyes where OBL did not occur using the original technique (no OBL group), and eyes in which the cone modification technique was used for LASIK flap creation (larger flap diameter) (cone modification technique group)...
September 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28874576/eighty-years-of-food-web-response-to-interannual-variation-in-discharge-recorded-in-river-diatom-frustules-from-an-ocean-sediment-core
#13
John B Sculley, Rex L Lowe, Charles A Nittrouer, Tina M Drexler, Mary E Power
Little is known about the importance of food-web processes as controls of river primary production due to the paucity of both long-term studies and of depositional environments which would allow retrospective fossil analysis. To investigate how freshwater algal production in the Eel River, northern California, varied over eight decades, we quantified siliceous shells (frustules) of freshwater diatoms from a well-dated undisturbed sediment core in a nearshore marine environment. Abundances of freshwater diatom frustules exported to Eel Canyon sediment from 1988 to 2001 were positively correlated with annual biomass of Cladophora surveyed over these years in upper portions of the Eel basin...
September 5, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28872734/xenon-as-an-adjuvant-to-sevoflurane-anesthesia-in-children-younger-than-4%C3%A2-years-of-age-undergoing-interventional-or-diagnostic-cardiac-catheterization-a-randomized-controlled-clinical-trial
#14
Sarah Devroe, Roselien Meeusen, Marc Gewillig, Bjorn Cools, Koen Poesen, Robert Sanders, Steffen Rex
BACKGROUND: Xenon has repeatedly been demonstrated to have only minimal hemodynamic side effects when compared to other anesthetics. Moreover, in experimental models, xenon was found to be neuroprotective and devoid of developmental neurotoxicity. These properties could render xenon attractive for the anesthesia in neonates and infants with congenital heart disease. However, experience with xenon anesthesia in children is scarce. AIMS: We hypothesized that in children undergoing cardiac catheterization, general anesthesia with a combination of sevoflurane with xenon results in superior hemodynamic stability, compared to sevoflurane alone...
September 5, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28861526/metabolic-network-analysis-and-metatranscriptomics-reveal-auxotrophies-and-nutrient-sources-of-the-cosmopolitan-freshwater-microbial-lineage-aci
#15
Joshua J Hamilton, Sarahi L Garcia, Brittany S Brown, Ben O Oyserman, Francisco Moya-Flores, Stefan Bertilsson, Rex R Malmstrom, Katrina T Forest, Katherine D McMahon
An explosion in the number of available genome sequences obtained through metagenomics and single-cell genomics has enabled a new view of the diversity of microbial life, yet we know surprisingly little about how microbes interact with each other or their environment. In fact, the majority of microbial species remain uncultivated, while our perception of their ecological niches is based on reconstruction of their metabolic potential. In this work, we demonstrate how the "seed set framework," which computes the set of compounds that an organism must acquire from its environment (E...
July 2017: MSystems
https://www.readbyqxmd.com/read/28855275/dynamic-proteome-profiling-of-individual-proteins-in-human-skeletal-muscle-after-a-high-fat-diet-and-resistance-exercise
#16
Donny M Camera, Jatin G Burniston, Mark A Pogson, William J Smiles, John A Hawley
It is generally accepted that muscle adaptation to resistance exercise (REX) training is underpinned by contraction-induced, increased rates of protein synthesis and dietary protein availability. By using dynamic proteome profiling (DPP), we investigated the contribution of both synthesis and breakdown to changes in abundance on a protein-by-protein basis in human skeletal muscle. Age-matched, overweight males consumed 9 d of a high-fat, low-carbohydrate diet during which time they either undertook 3 sessions of REX or performed no exercise...
August 30, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28844307/clinical-evidence-for-regenerative-endodontic-procedures-immediate-versus-delayed-induction
#17
Tatiana M Botero, Xianli Tang, Richard Gardner, Jan C C Hu, James R Boynton, G Rex Holland
Clinicians face many challenges when treating immature permanent teeth in young patients. Immediate blood clot induction can be a successful option as described by some case reports. No experimental studies or clinical trials have addressed this question. We have designed a clinical trial in which we hypothesized that there is no difference in success between immediate or delayed induction protocols. After confirmation of pulpal necrosis, patients were randomized. In the delayed group, 15 teeth were treated following the American Association of Endodontists guidelines, and calcium hydroxide was used as the intracanal medication...
September 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28842052/polyp-detection-at-colonoscopy-endoscopist-and-technical-factors
#18
REVIEW
Douglas K Rex
The adenoma detection rate (ADR) has emerged as the most important quality measure in colonoscopy, as it predicts the risk of interval cancer after colonoscopy. Measuring and improving ADR is the central focus of the current quality movement in colonoscopy. High ADRs can be achieved by a colonoscopist with a thorough understanding of the wide range of endoscopic appearances of precancerous lesions in the colorectum, effective bowel preparation, and meticulous technique using high definition colonoscopes. The knowledgeable and effective examiner needs no adjunctive devices or techniques to achieve master level ADRs...
August 2017: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/28837074/remembering-dr-rex-munday
#19
EDITORIAL
Luis M Botana, Vitor Vasconcelos
Rex Munday was a scientist working for AgResearch Ltd. in New Zealand. He was a leading figure in the area of marine toxin toxicity. His passing in July 2017 marked a loss for his family, as well as for colleagues who knew him as a dedicated professional, and a lively scientist with a great sense of humor.
August 24, 2017: Toxins
https://www.readbyqxmd.com/read/28830945/pharmacodynamics-of-the-orotomides-against-aspergillus-fumigatus-new-opportunities-for-treatment-of-multidrug-resistant-fungal-disease
#20
William W Hope, Laura McEntee, Joanne Livermore, Sarah Whalley, Adam Johnson, Nicola Farrington, Ruwanthi Kolamunnage-Dona, Julie Schwartz, Anthony Kennedy, Derek Law, Michael Birch, John H Rex
F901318 is an antifungal agent with a novel mechanism of action and potent activity against Aspergillus spp. An understanding of the pharmacodynamics (PD) of F901318 is required for selection of effective regimens for study in phase II and III clinical trials. Neutropenic murine and rabbit models of invasive pulmonary aspergillosis were used. The primary PD endpoint was serum galactomannan. The relationships between drug exposure and the impacts of dose fractionation on galactomannan, survival, and histopathology were determined...
August 22, 2017: MBio
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