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https://www.readbyqxmd.com/read/28817787/evaluation-of-the-electron-transfer-flavoprotein-etf-as-an-antibacterial-target-in-burkholderia-cenocepacia
#1
Maria S Stietz, Christina Lopez, Osasumwen Osifo, Marcelo Tolmasky, Silvia T Cardona
There are hundreds of essential genes in multidrug resistant bacterial genomes, but only a few of their products are exploited as antibacterial targets. An example is the electron flavoprotein (ETF) which is required for growth and viability in <i>Burkholderia cenocepacia</i>. Here, we evaluated ETF as an antibiotic target for <i>Burkholderia cepacia</i> complex (Bcc). Depletion of the bacterial ETF during infection of <i>Caenorhabditis elegans</i> significantly extended survival of the nematodes, proving that ETF is essential for survival of <i>B...
August 17, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28816179/embedded-atom-method-potential-for-modeling-hydrogen-and-hydrogen-defect-interaction-in-tungsten
#2
Li-Fang Wang, Xiaolin Shu, Guang-Hong Lu, Fei Gao
An embedded-atom method potential has been developed for modeling hydrogen in body-centered-cubic (bcc) tungsten by fitting to an extensive database of density functional theory (DFT) calculations. Comprehensive evaluations of the new potential are conducted by comparing various hydrogen properties with DFT calculations and available experimental data, as well as all the other tungsten-hydrogen potentials. The new potential accurately reproduces the point defect properties of hydrogen, the interaction among hydrogen atoms, the interplay between hydrogen and a monovacancy, and the thermal diffusion of hydrogen in tungsten...
August 17, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28811523/strong-ductile-and-thermally-stable-bcc-mg-nanolaminates
#3
Siddhartha Pathak, Nenad Velisavljevic, J Kevin Baldwin, Manish Jain, Shijian Zheng, Nathan A Mara, Irene J Beyerlein
Magnesium has attracted attention worldwide because it is the lightest structural metal. However, a high strength-to-weight ratio remains its only attribute, since an intrinsic lack of strength, ductility and low melting temperature severely restricts practical applications of Mg. Through interface strains, the crystal structure of Mg can be transformed and stabilized from a simple hexagonal (hexagonal close packed hcp) to body center cubic (bcc) crystal structure at ambient pressures. We demonstrate that when introduced into a nanocomposite bcc Mg is far more ductile, 50% stronger, and retains its strength after extended exposure to 200 C, which is 0...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28809460/quasi-dual-packed-kernelled-au49-2-4-dmbt-27-nanoclusters-and-the-influence-of-kernel-packing-on-the-electrochemical-gap
#4
Zhikun Wu
Although face-centered cubic (fcc), body-centered cubic (bcc), hexagonal close-packed (hcp) and other structured gold nanoclusters have been reported, it is still unclear if gold nanoclusters with mix-packed (e.g., fcc and non-fcc) kernels exist, and the correlation between kernel packing and the properties of gold nanoclusters is unknown. Herein, a novel Au49(2,4-DMBT)27 nanocluster with shell electron count of 22 has been synthesized and structurally resolved by single-crystal X-ray crystallography, which revealed that Au49(2,4-DMBT)27 contained a unique Au34 kernel consisting of one quasi-fcc-structured Au21 and one non-fcc-structured Au13 unit (where 2,4-DMBTH = 2,4-dimethylbenzenethiol)...
August 15, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28809133/orientation-relationships-in-al0-7cocrfeni-high-entropy-alloy
#5
Leo T H de Jeer, Václav Ocelík, Jeff T M De Hosson
A detailed microstructural evaluation was executed on the crystallographic texture as well as the mechanisms for nucleation, phase transformation, and grain growth in a Al0.7CoCrFeNi high-entropy alloy. The microstructure and crystallographic orientations were characterized by electron backscatter diffraction, and the chemical composition variations by energy-dispersive X-ray spectroscopy. The cast Al0.7CoCrFeNi alloy started in the BCC phase and partially transformed into the FCC phase. It was found that the Pitsch orientation relationship (OR) dominates the nucleation mechanism of the FCC phase; however, deviations with respect to the Pitsch OR are observed and are attributed to the differently sized atoms forming an ordered B2 phase in the alloy causing lattice distortions...
August 15, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28799948/anticancer-drugs-and-the-regulation-of-hedgehog-genes-gli1-and-ptch1-a-comparative-study-in-nonmelanoma-skin-cancer-cell-lines
#6
Uffe H Olesen, Sophie Bojesen, Julie Gehl, Merete Haedersdal
Nonmelanoma skin cancer is the most common cancer in humans, comprising mainly basal cell carcinoma (BCC) and squamous cell carcinoma (SCC). BCC proliferation is highly dependent on the Hedgehog signaling pathway. We aimed to investigate a panel of anticancer drugs with known activity against skin cancer for their therapeutic potential in localized, enhanced topical treatment of SCC and BCC. Cytotoxicity profiles for vismodegib, 5-fluorouracil (5-FU), methotrexate (MTX), cisplatin, bleomycin, and vorinostat were established in terms of half maximal inhibitory concentration values in a panel of immortalized keratinocytes (HaCaT), BCC (UWBCC1 and BCC77015), and SCC (A431 and SCC25) cell lines...
August 9, 2017: Anti-cancer Drugs
https://www.readbyqxmd.com/read/28799019/endometriosis-and-the-risk-of-skin-cancer-a-prospective-cohort-study
#7
Leslie V Farland, Simon Lorrain, Stacey A Missmer, Laureen Dartois, Iris Cervenka, Isabelle Savoye, Sylvie Mesrine, Marie-Christine Boutron-Ruault, Marina Kvaskoff
PURPOSE: Endometriosis has been associated with an increased risk of skin melanoma. However, associations with other skin cancer types and how they compare with melanoma are unclear. Our objective was to prospectively investigate the relationships between endometriosis and risk of non-melanoma and melanoma skin cancers. METHODS: E3N is a prospective cohort of 98,995 French women aged 40-65 years in 1990. Data on surgically confirmed endometriosis and skin cancer diagnoses were collected every 2-3 years through self-report, with skin cancer cases confirmed through pathology reports...
August 10, 2017: Cancer Causes & Control: CCC
https://www.readbyqxmd.com/read/28798381/transcriptional-hallmarks-of-cancer-cell-lines-reveal-an-emerging-role-of-branched-chain-amino-acid-catabolism
#8
Ieva Antanavičiūtė, Valeryia Mikalayeva, Ieva Ceslevičienė, Gintarė Milašiūtė, Vytenis Arvydas Skeberdis, Sergio Bordel
A comparative analysis between cancer cell lines and healthy dividing cells was performed using data (289 microarrays and 50 RNA-seq samples) from 100 different cancer cell lines and 6 types of healthy stem cells. The analysis revealed two large-scale transcriptional events that characterize cancer cell lines. The first event was a large-scale up-regulation pattern associated to epithelial-mesenchymal transition, putatively driven by the interplay of the SP1 transcription factor and the canonical Wnt signaling pathway; the second event was the failure to overexpress a diverse set of genes coding membrane and extracellular proteins...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28797452/outcome-following-radiotherapy-for-head-and-neck-basal-cell-carcinoma-with-aggressive-features
#9
Anupam Rishi, Shao Hui Huang, Brian O'Sullivan, David P Goldstein, Lin Lu, Jolie Ringash, John Waldron, Woody Wells, Alex Sun, Andrew Hope, Peter Chung, Meredith Giuliani, Anna Spreafico, Li Tong, Wei Xu, Andrew Bayley
OBJECTIVES: The literature demonstrates that 'aggressive' head-and-neck basal cell carcinomas (HN-BCC) have a higher than expected relapse rate with unfavorable outcomes. We report outcomes following definitive (dRT) or post-operative radiotherapy (PORT) for these tumors. METHODS: We reviewed all HN-BCC patients with 'aggressive' features (primary lesions diameter >10mm, >2 recurrences, or extra-cutaneous extension), treated with megavoltage dRT or PORT between 1998 and 2013...
September 2017: Oral Oncology
https://www.readbyqxmd.com/read/28782306/nutrition-behaviour-change-communication-causes-sustained-effects-on-iycn-knowledge-in-two-cluster-randomised-trials-in-bangladesh
#10
John Hoddinott, Akhter Ahmed, Naureen I Karachiwalla, Shalini Roy
Behaviour change communication (BCC) can improve infant and young child nutrition (IYCN) knowledge, practices, and health outcomes. However, few studies have examined whether the improved knowledge persists after BCC activities end. This paper assesses the effect of nutrition sensitive social protection interventions on IYCN knowledge in rural Bangladesh, both during and after intervention activities. We use data from two, 2-year, cluster randomised control trials that included nutrition BCC in some treatment arms...
August 7, 2017: Maternal & Child Nutrition
https://www.readbyqxmd.com/read/28780365/risk-of-cutaneous-squamous-cell-carcinoma-after-treatment-of-basal-cell-carcinoma-with-vismodegib
#11
Tina Bhutani, Michael Abrouk, Camelia S Sima, Natalia Sadetsky, Jeannie Hou, Ivor Caro, Mary-Margaret Chren, Sarah T Arron
BACKGROUND: Vismodegib is a first-in-class agent targeting the hedgehog signaling pathway for treatment of patients with locally advanced basal cell carcinoma (BCC) and metastatic BCC. There have been concerns about the development of squamous cell carcinoma (SCC) in patients treated with this drug. OBJECTIVE: We sought to determine whether treatment with vismodegib is associated with an increase in the risk of cutaneous SCC. METHODS: In this retrospective cohort study, patients treated with vismodegib as part of phase I and II clinical studies were compared with participants from the University of California, San Francisco, Nonmelanoma Skin Cancer Cohort who received standard therapy for primary BCC...
August 2, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28774592/vitamin-d3-produced-by-skin-exposure-to-uvr-inhibits-murine-basal-cell-carcinoma-carcinogenesis
#12
Anastasia Makarova, Grace Wang, John A Dolorito, Subheksha Kc, Eileen Libove, Ervin H Epstein
The effect of ultraviolet radiation (UVR) on human basal cell carcinoma (BCC) epidemiology is complex - the incidence rises until approximately 30,000 hours of lifetime sunlight exposure and then plateaus. We hypothesize that UVR has opposing effects on BCC carcinogenesis - stimulatory via mutagenesis, etc. and inhibitory via production of hedgehog-inhibiting vitamin D3 (D3). We find that UVR exposure of ionizing radiation (IR)-treated Ptch1(+/-) mice accelerates BCC carcinogenesis in male mice, in which UVR does not produce D3...
July 31, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28773790/atomistically-informed-extended-gibbs-energy-description-for-phase-field-simulation-of-tempering-of-martensitic-steel
#13
Oleg Shchyglo, Thomas Hammerschmidt, Miroslav Čak, Ralf Drautz, Ingo Steinbach
In this study we propose a unified multi-scale chemo-mechanical description of the BCT (Body-Centered Tetragonal) to BCC (Body-Centered Cubic) order-disorder transition in martensitic steel by adding the mechanical degrees of freedom to the standard CALPHAD (CALculation of PHAse Diagrams) type Gibbs energy description. The model takes into account external strain, the effect of carbon composition on the lattice parameter and elastic moduli. The carbon composition effect on the lattice parameters and elastic constants is described by a sublattice model with properties obtained from DFT (Density Functional Theory) calculations; the temperature dependence of the elasticity parameters is estimated from available experimental data...
August 9, 2016: Materials
https://www.readbyqxmd.com/read/28772975/hydrogen-induced-delayed-cracking-in-trip-aided-lean-alloyed-ferritic-austenitic-stainless-steels
#14
Suvi Papula, Teemu Sarikka, Severi Anttila, Juho Talonen, Iikka Virkkunen, Hannu Hänninen
Susceptibility of three lean-alloyed ferritic-austenitic stainless steels to hydrogen-induced delayed cracking was examined, concentrating on internal hydrogen contained in the materials after production operations. The aim was to study the role of strain-induced austenite to martensite transformation in the delayed cracking susceptibility. According to the conducted deep drawing tests and constant load tensile testing, the studied materials seem not to be particularly susceptible to delayed cracking. Delayed cracks were only occasionally initiated in two of the materials at high local stress levels...
June 3, 2017: Materials
https://www.readbyqxmd.com/read/28772799/in-situ-tem-study-of-microstructure-evolution-of-zr-nb-fe-alloy-irradiated-by-800-kev-kr-2-ions
#15
Penghui Lei, Guang Ran, Chenwei Liu, Chao Ye, Dong Lv, Jianxin Lin, Yizhen Wu, Jiangkun Xu
The microstructure evolution of Zr-1.1Nb-1.51Fe-0.26Cu-0.72Ni zirconium alloy, irradiated by 800 keV Kr(2+) ions at 585 K using the IVEM-Tandem Facility at Argonne National Laboratory, was observed by in situ transmission electron microscopy. A number of β-Nb precipitates with a body-centered cubic (BCC) structure were distributed in the as-received zirconium alloy with micrometer-size grains. Kr(2+) ion irradiation induced the growth of β-Nb precipitates, which could be attributed to the segregation of the dissolved niobium atoms in the zirconium lattice and the migration to the existing precipitates...
April 22, 2017: Materials
https://www.readbyqxmd.com/read/28771885/in-vivo-measurements-of-blood-vessels-distribution-in-non-melanoma-skin-cancer-by-dynamic-optical-coherence-tomography-a-new-quantitative-measure
#16
V Sigsgaard, L Themstrup, P Theut Riis, J Olsen, G B Jemec
BACKGROUND: Skin biopsies only provide point-in-time data making longitudinal studies difficult. Using Dynamic optical coherence tomography (D-OCT) in vivo, non-invasive imaging of the microvasculature becomes possible. The current OCT literature is almost exclusively based on qualitative information but quantitative data may offer additional advantages, for example, by reducing observer variation. The objective of this study was to evaluate the in vivo superficial distribution of blood vessels, defined as the surface-to-first-vessel distance, in actinic keratosis, basal cell carcinoma, squamous cell carcinoma and normal skin...
August 3, 2017: Skin Research and Technology
https://www.readbyqxmd.com/read/28769959/introgression-of-black-rot-resistance-from-brassica-carinata-to-cauliflower-brassica-oleracea-botrytis-group-through-embryo-rescue
#17
Brij B Sharma, Pritam Kalia, Dinesh Singh, Tilak R Sharma
Black rot caused by Xanthomonas campestris pv. campestris (Xcc) is a very important disease of cauliflower (Brassica oleracea botrytis group) resulting into 10-50% yield losses every year. Since there is a dearth of availability of resistance to black rot disease in B. oleracea (C genome), therefore exploration of A and B genomes was inevitable as they have been reported to be potential reservoirs of gene(s) for resistance to black rot. To utilize these sources, interspecific hybrid and backcross progeny (B1) were generated between cauliflower "Pusa Sharad" and Ethiopian mustard "NPC-9" employing in vitro embryo rescue technique...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28766013/metal-arc-welding-and-the-risk-of-skin-cancer
#18
K N Heltoft, R M Slagor, T Agner, J P Bonde
OBJECTIVES: Arc welding produces the full spectrum of ultraviolet radiation and may be a contributory cause of skin cancer; however, there has been little research into this occupational hazard. The aim of this study is to explore if metal arc welding increases the risk of malignant melanoma and/or basal cell carcinoma (BCC) and squamous cell carcinoma (SCC) on skin areas which may possibly be exposed (neck, head, and upper extremities). METHOD: A Danish national company-based historic cohort of 4333 male metal arc welders was followed from 1987 through 2012 to identify the risk of skin cancer...
August 1, 2017: International Archives of Occupational and Environmental Health
https://www.readbyqxmd.com/read/28765963/suppression-of-tafi-by-sirna-inhibits-invasion-and-migration-of-breast-cancer-cells
#19
Chao Yu, Yun Luan, Zejun Wang, Jingjie Zhao, Chengwei Xu
Human thrombin activatable fibrinolysis inhibitor (TAFI), also known as carboxypeptidase B2 (CPB2), is a procarboxypeptidase enzyme. The purpose of the present study was to observe the expression of TAFI in breast cancer (BC) and breast cancer cell (BCC) lines and to investigate the effect of TAFI suppression by small interfering (si)RNA gene silencing on invasion and migration of BCC lines. A significant increase in TAFI level was identified by immunohistochemical analysis in BC tissues compared with normal breast tissues...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28764171/evaluation-of-hypoxia-inducible-factor-1%C3%AE-and-glucose-transporter-1-expression-in-non-melanoma-skin-cancer-an-immunohistochemical-study
#20
Iman Seleit, Ola Ahmed Bakry, Dalia Rifaat Al-Sharaky, Rania Abdel Aziz Ragab, Shimaa Ahmed Al-Shiemy
INTRODUCTION: Hypoxia Inducible Factor-1 (HIF-1) is a mediator enabling cell adaptation to hypoxia. It plays its role mainly through transcription of many target genes including Glucose Transporter-1 (GLUT-1) gene. AIM: The present work aimed at evaluating the pattern and distribution of HIF-1α and GLUT-1 in each case and control. MATERIALS AND METHODS: A case-control and retrospective study was conducted on archival blocks diagnosed from pathology department as, Basal Cell Carcinoma (BCC, 20 cases), cutaneous Squamous Cell Carcinoma (SCC, 20 cases) and 20 normal site-matched skin biopsies from age and gender-matched healthy subjects as a control...
June 2017: Journal of Clinical and Diagnostic Research: JCDR
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