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https://www.readbyqxmd.com/read/28900020/petrobactin-is-exported-from-bacillus-anthracis-by-the-rnd-type-exporter-apex
#1
A K Hagan, A Tripathi, D Berger, D H Sherman, P C Hanna
Bacillus anthracis-a Gram-positive, spore-forming bacterium-causes anthrax, a highly lethal disease with high bacteremia titers. Such rapid growth requires ample access to nutrients, including iron. However, access to this critical metal is heavily restricted in mammals, which requires B. anthracis to employ petrobactin, an iron-scavenging small molecule known as a siderophore. Petrobactin biosynthesis is mediated by asb gene products, and import of the iron-bound (holo)-siderophore into the bacterium has been well studied...
September 12, 2017: MBio
https://www.readbyqxmd.com/read/28874796/controlled-self-organization-of-polymer-nanopatterns-over-large-areas
#2
Ilknur Hatice Eryilmaz, John Mohanraj, Simone Dal Zilio, Alessandro Fraleoni-Morgera
Self-assembly methods allow to obtain ordered patterns on surfaces with exquisite precision, but often lack in effectiveness over large areas. Here we report on the realization of hierarchically ordered polymethylmethacrylate (PMMA) nanofibres and nanodots over large areas from solution via a fast, easy and low-cost method named ASB-SANS, based on a ternary solution that is cast on the substrate. Simple changes to the ternary solution composition allow to control the transition from nanofibres to nanodots, via a wide range of intermediate topologies...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28870857/molecular-characterization-and-expression-analysis-of-interferon-gamma-in-black-seabream-acanthopagrus-schlegelii
#3
Yangxi Xiang, Wei Liu, Peng Jia, Yunlong Li, Yilin Jin, Limin Chen, Jing Zhang, Kuntong Jia, Meisheng Yi
Interferon gamma (IFN-γ) is a major component in immunological signaling and plays a key role in resisting viral infection. In this study, we identified and characterized an IFN-γ gene (AsIFN-γ) in the marine fish black seabream (Acanthopagrus schlegelii). We cloned AsIFN-γ genomic sequence, which comprises four exons, three introns and an upstream promoter including several conserved regulatory elements. The complete cDNA of AsIFN-γ was 816 bp in length and encoded a putative 194 amino acids (aa) protein with a 22 aa signal peptide, six α-helices and one nuclear localization signal (NLS)...
September 7, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28836235/biophysical-approaches-in-the-study-of-biomembrane-solubilization-quantitative-assessment-and-the-role-of-lateral-inhomogeneity
#4
REVIEW
Karin A Riske, Cleyton C Domingues, Bruna R Casadei, Bruno Mattei, Amanda C Caritá, Rafael B Lira, Paulo S C Preté, Eneida de Paula
Detergents are amphiphilic molecules widely used to solubilize biological membranes and/or extract their components. Nevertheless, because of the complex composition of biomembranes, their solubilization by detergents has not been systematically studied. In this review, we address the solubilization of erythrocytes, which provide a relatively simple, robust and easy to handle biomembrane, and of biomimetic models, to stress the role of the lipid composition on the solubilization process. First, results of a systematic study on the solubilization of human erythrocyte membranes by different series of non-ionic (Triton, CxEy, Brij, Renex, Tween), anionic (bile salts) and zwitterionic (ASB, CHAPS) detergents are shown...
August 23, 2017: Biophysical Reviews
https://www.readbyqxmd.com/read/28789721/sociodemographic-lifestyle-and-behavioural-factors-associated-with-consumption-of-sweetened-beverages-among-adults-in-cambridgeshire-uk-the-fenland-study
#5
Peter Barrett, Fumiaki Imamura, Søren Brage, Simon J Griffin, Nicholas J Wareham, Nita G Forouhi
OBJECTIVE: We aimed to identify sociodemographic, lifestyle and behavioural determinants of consumption of sugar-sweetened beverages (SSB) and artificially sweetened beverages (ASB) among adults in Cambridgeshire, UK. DESIGN: Cross-sectional data were obtained from a cohort of 9991 adults born between 1950 and 1975. An FFQ was used to assess consumption of beverages and other dietary factors. Multivariable logistic regression was used to examine potential determinants of consuming SSB and ASB (≥1 serving/d)...
August 9, 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/28772151/concentrations-of-urinary-arsenic-species-in-relation-to-rice-and-seafood-consumption-among-children-living-in-spain
#6
Antonio J Signes-Pastor, Jesus Vioque, Eva M Navarrete-Muñoz, Manus Carey, Manoli García de la Hera, Jordi Sunyer, Maribel Casas, Isolina Riaño-Galán, Adonina Tardón, Sabrina Llop, Rubén Amorós, Pilar Amiano, José R Bilbao, Margaret R Karagas, Andrew A Meharg
Inorganic arsenic (i-As) has been related to wide-ranging health effects in children, leading to lifelong concerns. Proportionally, dietary i-As exposure dominates in regions with low arsenic drinking water. This study aims to investigate the relation between rice and seafood consumption and urinary arsenic species during childhood and to assess the proportion of urinary i-As metabolites. Urinary arsenic species concentration in 400 4-year-old children living in four geographical areas of Spain, in addition to repeated measures from 100 children at 7 years of age are included in this study...
August 1, 2017: Environmental Research
https://www.readbyqxmd.com/read/28763649/biomarkers-of-arsenic-exposure-in-arsenic-affected-areas-of-the-hetao-basin-inner-mongolia
#7
Ting Liu, Huaming Guo, Wei Xiu, Chao Wei, Xiaomeng Li, Zhen Di, Wei Song
Seventy saliva samples, seventy urine samples, seventy nail samples, seventy hair samples, eight drinking water samples and ninety-three crop samples were collected from four villages of the Hetao Basin in Inner Mongolia to determine arsenic (As) exposure biomarkers and evaluate relationship between As uptake and human health risk. Trivalent As (As(III)), pentavalent As (As(V)), dimethylarsinic acid (DMA), arsenobetaine (AsB) and monomethylarsonic acid (MMA) were found in all urine samples. Only As(III) and As(V) were detected in saliva samples...
December 31, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28757678/microrna-expression-in-malignant-pleural-mesothelioma-and-asbestosis-a-pilot-study
#8
Paola Mozzoni, Luca Ampollini, Matteo Goldoni, Rossella Alinovi, Marcello Tiseo, Letizia Gnetti, Paolo Carbognani, Michele Rusca, Antonio Mutti, Antonio Percesepe, Massimo Corradi
BACKGROUND: The identification of diagnostic/prognostic biomarkers for asbestos-related diseases is relevant for early diagnosis and patient survival and may contribute to understanding the molecular mechanisms underlying the disease development and progression. AIMS: To identify a pattern of miRNAs as possible diagnostic biomarkers for patients with malignant pleural mesothelioma (MPM) and asbestosis (ASB) and as prognostic biomarkers for MPM patients. METHODS: miRNA-16, miRNA-17, miRNA-126, and miRNA-486 were quantified in plasma and formalin-fixed paraffin-embedded samples to evaluate their diagnostic and prognostic roles compared to patients with other noncancerous pulmonary diseases (controls)...
2017: Disease Markers
https://www.readbyqxmd.com/read/28712770/determination-of-trace-metals-and-analysis-of-arsenic-species-in-tropical-marine-fishes-from-spratly-islands
#9
Jingxi Li, Chengjun Sun, Li Zheng, Fenghua Jiang, Shuai Wang, Zhixia Zhuang, Xiaoru Wang
Trace metal contents in 38 species of tropical marine fishes harvested from the Spratly islands of China were determined by microwave digestion and inductively coupled plasma mass spectrometry analysis. Arsenic species were determined by high-performance liquid chromatography and inductively coupled plasma mass spectrometry analysis. The average levels of Al, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Mo, Cd, Pb, and U in the fish samples were 1.683, 0.350, 0.367, 2.954, 36.615, 0.087, 0.319, 1.566, 21.946, 20...
July 13, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28659294/artificially-sweetened-beverages-sugar-sweetened-beverages-plain-water-and-incident-diabetes-mellitus-in-postmenopausal-women-the-prospective-women-s-health-initiative-observational-study
#10
Mengna Huang, Abdullah Quddus, Lynda Stinson, James M Shikany, Barbara V Howard, Randa M Kutob, Bing Lu, JoAnn E Manson, Charles B Eaton
Background: Sugar-sweetened beverages (SSBs) have been associated with an increased risk of diabetes mellitus (DM), whereas the association with artificially sweetened beverages (ASBs) is unclear.Objective: We aimed to evaluate the associations of ASB and SSB consumption with the risk of developing DM and the potential benefit of replacing SSBs with ASBs or water.Design: The national Women's Health Initiative recruited a large prospective cohort of postmenopausal women between 1993 and 1998. ASB, SSB, and water consumption was measured by lifestyle questionnaires, and DM was self-reported...
August 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28636060/developing-mobile-clinical-decision-support-for-nursing-home-staff-assessment-of-urinary-tract-infection-using-goal-directed-design
#11
Wallace Jones, Cynthia Drake, David Mack, Blaine Reeder, Barbara Trautner, Heidi Wald
BACKGROUND: Unique characteristics of nursing homes (NHs) contribute to high rates of inappropriate antibiotic use for asymptomatic bacteriuria (ASB), a benign condition. A mobile clinical decision support system (CDSS) may support NH staff in differentiating urinary tract infections (UTI) from ASB and reducing antibiotic days. OBJECTIVES: We used Goal-Directed Design to: 1) Characterize information needs for UTI identification and management in NHs; 2) Develop UTI Decide, a mobile CDSS prototype informed by personas and scenarios of use constructed from Aim 1 findings; 3) Evaluate the UTI Decide prototype with NH staff...
June 20, 2017: Applied Clinical Informatics
https://www.readbyqxmd.com/read/28624753/treatment-of-asymptomatic-uti-in-older-delirious-medical-in-patients-a-prospective-cohort-study
#12
Monidipa Dasgupta, Chris Brymer, Sameer Elsayed
BACKGROUND: Despite clinical practice guidelines, asymptomatic bacteriuria (ASB) in older people is frequently treated. A common reason for treating ASB is a change in mental status. OBJECTIVE: To determine how often asymptomatic UTI is treated in older medically ill delirious individuals and its association with functional recovery. METHODS: Consecutive older medical in-patients were screened for delirium, and followed in hospital. Treatment for asymptomatic UTI was defined as documented treatment for a possible urinary tract infection with antibiotics, without concurrent infectious or urinary symptoms...
September 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28618051/quantitative-bioanalysis-of-bavachalcone-in-rat-plasma-by-lc-ms-ms-and-its-application-in-a-pharmacokinetics-study
#13
Dan Zhou, Lianhua An, Yan Xia, Yuanyi Wang, Xingliang Li
This study aims to develop and validate a simple and sensitive liquid chromatography with tandem mass spectrometry (LC-MS/MS) method for investigating the pharmacokinetic characteristics of bavachalcone. Liquid-liquid extraction was used to prepare plasma sample. Chromatographic separation of bavachalcone and IS was achieved by using a Venusil ASB C18 (2.1 × 50 mm, 5 μm) column with a mobile phase of methanol (A)-water (B) (70:30, v/v). The detection and quantification of analytes was performed in selected-reaction monitoring mode using precursor→product ion combinations of m/z 323...
June 15, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28586472/maternal-consumption-of-artificially-sweetened-beverages-during-pregnancy-and-offspring-growth-through-7-years-of-age-a-prospective-cohort-study
#14
Yeyi Zhu, Sjurdur F Olsen, Pauline Mendola, Thorhallur I Halldorsson, Shristi Rawal, Stefanie N Hinkle, Edwina H Yeung, Jorge E Chavarro, Louise G Grunnet, Charlotta Granström, Anne A Bjerregaard, Frank B Hu, Cuilin Zhang
Background: Artificial sweeteners are widely replacing caloric sweeteners. Data on long-term impact of artificially sweetened beverage (ASB) consumption during pregnancy on offspring obesity risk are lacking. We prospectively investigated intake of ASBs and sugar-sweetened beverages (SSBs) during pregnancy in relation to offspring growth through age 7 years among high-risk children born to women with gestational diabetes. Methods: In a prospective study of 918 mother-singleton child dyads from the Danish National Birth Cohort, maternal dietary intake was assessed by a food frequency questionnaire during pregnancy...
June 6, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/28555534/personality-risk-for-antisocial-behavior-testing-the-intersections-between-callous-unemotional-traits-sensation-seeking-and-impulse-control-in-adolescence
#15
Frank D Mann, Sara L Paul, Jennifer L Tackett, Elliot M Tucker-Drob, K Paige Harden
The current project seeks to integrate literatures on personality risk for antisocial behavior (ASB) by examining how callous-unemotional traits relate to (a) the development of disinhibited traits and (b) the association between disinhibited traits and ASB. In Study 1, using a nationally representative sample of youth (N > 7,000), we examined whether conduct problems and lack of guilt assessed during ages 4-10 years predicted levels of and changes in disinhibited traits over the course of adolescence, and moderated associations between these traits and ASB...
May 30, 2017: Development and Psychopathology
https://www.readbyqxmd.com/read/28553665/urinary-arsenic-speciation-in-children-and-pregnant-women-from-spain
#16
Antonio J Signes-Pastor, Manus Carey, Jesus Vioque, Eva M Navarrete-Muñoz, Cristina Rodríguez-Dehli, Adonina Tardón, Miren Begoña-Zubero, Loreto Santa-Marina, Martine Vrijheid, Maribel Casas, Sabrina Llop, Sandra Gonzalez-Palacios, Andrew A Meharg
Inorganic arsenic (i-As) is a non-threshold human carcinogen that has been associated with several adverse health outcomes. Exposure to i-As is of particular concern among pregnant women, infants and children, as they are specifically vulnerable to the adverse health effects of i-As, and in utero and early-life exposure, even low to moderate levels of i-As, may have a marked effect throughout the lifespan. Ion chromatography-mass spectrometry detection (IC-ICP-MS) was used to analyse urinary arsenic speciation, as an exposure biomarker, in samples of 4-year-old children with relatively low-level arsenic exposure living in different regions in Spain including Asturias, Gipuzkoa, Sabadell and Valencia...
2017: Expo Health
https://www.readbyqxmd.com/read/28551855/characterization-of-a-novel-theme-c-glycoside-hydrolase-family-9-cellulase-and-its-cbm-chimeric-enzymes
#17
Cheng-Jie Duan, Ming-Yue Huang, Hao Pang, Jing Zhao, Chao-Xing Wu, Jia-Xun Feng
In bacterial cellulase systems, glycoside hydrolase family 9 (GH9) cellulases are generally regarded as the major cellulose-degrading factors besides GH48 exoglucanase. In this study, umcel9A, which was cloned from uncultured microorganisms from compost, with the encoded protein being theme C GH9 cellulase, was heterologously expressed in Escherichia coli, and the biochemical properties of the purified enzyme were characterized. Hydrolysis of carboxylmethylcellulose (CMC) by Umcel9A led to the decreased viscosity of CMC solution and production of reducing sugars...
May 27, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28531558/accumulation-translocation-and-conversion-of-six-arsenic-species-in-rice-plants-grown-near-a-mine-impacted-city
#18
Li Ma, Lin Wang, Yuyu Jia, Zhaoguang Yang
Paddy rice (Oryza sativa L.) as the staple food in China was found to be efficient in accumulating arsenic (As) due to cultivated in flooded paddy soil. Uptake and translocation of As in rice plant depended on the As species. In this work, rice plant samples including roots, straws and grains as well as rhizosphere soils were collected from paddy fields near Changsha, a mine impacted city in Southern China. The total As concentrations in the collected samples were observed in the descending order as root > soil > straw > grain...
May 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28531289/management-of-bacteriuria-in-veterans-affairs-hospitals
#19
Emily S Spivak, Muriel Burk, Rongping Zhang, Makoto M Jones, Melinda M Neuhauser, Matthew Bidwell Goetz, Francesca E Cunningham
Background: Bacteriuria contributes to antibiotic overuse through treatment of asymptomatic bacteriuria (ASB) and long durations of therapy for symptomatic urinary tract infections (UTIs), yet large-scale evaluations of bacteriuria management among inpatients are lacking. Methods: Inpatients with bacteriuria were classified as asymptomatic or symptomatic based on established criteria applied to data collected by manual chart review. We examined frequency of treatment of ASB, factors associated with treatment of ASB, durations of therapy, and frequency of complications including Clostridium difficile infection, readmission, and all-cause mortality within 28 days of discharge...
September 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28513319/effect-of-surface-functionalizations-of-multi-walled-carbon-nanotubes-on-neoplastic-transformation-potential-in-primary-human-lung-epithelial-cells
#20
Todd A Stueckle, Donna C Davidson, Ray Derk, Peng Wang, Sherri Friend, Diane Schwegler-Berry, Peng Zheng, Nianqiang Wu, Vince Castranova, Yon Rojanasakul, Liying Wang
Functionalized multi-walled carbon nanotube (fMWCNT) development has been intensified to improve their surface activity for numerous applications, and potentially reduce toxic effects. Although MWCNT exposures are associated with lung tumorigenesis in vivo, adverse responses associated with exposure to different fMWCNTs in human lung epithelium are presently unknown. This study hypothesized that different plasma-coating functional groups determine MWCNT neoplastic transformation potential. Using our established model, human primary small airway epithelial cells (pSAECs) were continuously exposed for 8 and 12 weeks at 0...
June 2, 2017: Nanotoxicology
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