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https://www.readbyqxmd.com/read/29770981/a-dehydrogenase-dual-hydrogen-abstraction-mechanism-promotes-estrogen-biosynthesis-can-we-expand-the-functional-annotation-of-the-aromatase-enzyme
#1
Angelo Spinello, Matic Pavlin, Lorenzo Casalino, Alessandra Magistrato
Cytochromes P450 (CYP450) are involved in the metabolism of exogenous compounds and in the synthesis of signaling molecules. Among the latter, human aromatase (HA) promotes estrogen biosynthesis, being a key pharmacological target against breast cancers. After decades of debate, the interest in gaining a comprehensive picture of HA catalysis has been renewed by the recent discovery that Compound I (Cpd I) is the reactive species of the peculiar aromatization step. Here, we provide for the first time a complete atomic-level picture of all controversial steps of estrogen biosynthesis...
May 17, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29769345/the-major-tegument-protein-of-bovine-herpesvirus-1-vp8-interacts-with-dna-damage-response-proteins-and-induces-apoptosis
#2
Sharmin Afroz, Ravendra Garg, Michel Fodje, Sylvia van Drunen Littel-van den Hurk
VP8, the UL47 gene product in bovine herpes virus-1 (BoHV-1), is a major tegument protein, essential for virus replication in vivo The major DNA damage response protein, ataxia telangiectasia mutated (ATM), phosphorylates Nijmegen breakage syndrome (NBS1) and structural maintenance of chromosome-1 (SMC1) proteins during the DNA damage response. VP8 was found to interact with ATM and NBS1 during transfection and BoHV-1 infection. However, VP8 did not interfere with phosphorylation of ATM in transfected or BoHV-1-infected cells...
May 16, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29768722/genoprotective-effect-of-phyllanthus-orbicularis-extract-against-uva-uvb-and-solar-radiation
#3
Marioly Vernhes Tamayo, André Passaglia Schuch, Teiti Yagura, Luis Baly Gil, Carlos Frederico Martins Menck, Angel Sánchez-Lamar
One approach to protect the human skin against harmful effects of solar ultraviolet (UV) radiation is to use natural products as photoprotectors. In this work, the extract from specie Phyllanthus orbicularis K was evaluated as a protective agent against the photodamage by UVB, UVA artificial lamps and environmental sunlight exposure. The plasmid DNA solutions were exposed to radiations using the DNA-dosimeter system in presence of plant extract. The DNA repair enzymes, E. coli Formamidopyrimidine-DNA glycosylase (Fpg) and T4 bacteriophage endonuclease V (T4-endo V), were employed to discriminate oxidized DNA damage and cyclobutane pyrimidine dimers (CPD) respectively...
May 16, 2018: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/29767774/common-and-rare-variants-genetic-association-analysis-of-cigarettes-per-day-among-ever-smokers-in-copd-cases-and-controls
#4
Sharon M Lutz, Brittni Frederiksen, Ferdouse Begum, Merry-Lynn McDonald, Michael H Cho, Brian Hobbs, Margaret M Parker, Dawn L DeMeo, Craig P Hersh, Marissa Eringher, Kendra Young, Lai Jiang, Marilyn G Foreman, Greg L Kinney, Barry J Make, David A Lomas, Per Bakke, Amund Gulsvik, James D Crapo, Edwin K Silverman, Terri H Beaty, John E Hokanson
Introduction: Cigarette smoking is a major environmental risk factor for many diseases, including chronic obstructive pulmonary disease (COPD). There are shared genetic influences on cigarette smoking and COPD. Genetic risk factors for cigarette smoking in cohorts enriched for COPD are largely unknown. Methods: We performed genome-wide association analyses for average cigarettes per day (CPD) across the COPDGene Non-Hispanic White (NHW) (n=6,659) and African American (AA) (n=3,260), GenKOLS (n=1,671), and ECLIPSE (n=1,942) cohorts...
May 15, 2018: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/29765873/characteristics-of-cricopharyngeal-dysphagia-after-ischemic-stroke
#5
Hyuna Yang, Youbin Yi, Yong Han, Hyun Jung Kim
Objective: To evaluate the characteristics of cricopharyngeal dysfunction (CPD), the frequency, and correlation with a brain lesion in patients with first-ever ischemic stroke, and to provide basic data for developing a therapeutic protocol for dysphagia management. Methods: We retrospectively reviewed the medical records of a series of subjects post-stroke who underwent a videofluoroscopic swallowing study (VFSS) from January 2009 to December 2015. VFSS images were recorded on videotape and analyzed...
April 2018: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/29759062/inhibition-of-2-ag-hydrolysis-differentially-regulates-blood-brain-barrier-permeability-after-injury
#6
Justin R Piro, Georgette L Suidan, Jie Quan, YeQing Pi, Sharon M O'Neill, Marissa Ilardi, Nikolay Pozdnyakov, Thomas A Lanz, Hualin Xi, Robert D Bell, Tarek A Samad
BACKGROUND: Acute neurological insults caused by infection, systemic inflammation, ischemia, or traumatic injury are often associated with breakdown of the blood-brain barrier (BBB) followed by infiltration of peripheral immune cells, cytotoxic proteins, and water. BBB breakdown and extravasation of these peripheral components into the brain parenchyma result in inflammation, oxidative stress, edema, excitotoxicity, and neurodegeneration. These downstream consequences of BBB dysfunction can drive pathophysiological processes and play a substantial role in the morbidity and mortality of acute and chronic neurological insults, and contribute to long-term sequelae...
May 14, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29755849/accreditation-in-india-pathways-and-mechanisms
#7
Swaptagni Das, Manan Shah, Amey Mane, Vishal Goyal, Vikram Singh, Jayesh Lele
Continuing medical education (CME) is a valuable mechanism to update physicians' knowledge with ever-increasing plethora of contemporary advances within medical fraternity. Over time, scope of CME has seen change from simple clinical updates to comprehensive continuing professional development (CPD), which is accomplished with help of accredited CME programmes. The Medical Council of India, in 2011, made a mandatory resolution for doctors to attend minimum of 30 hours of CME/5 years to ensure recertification...
2018: Journal of European CME
https://www.readbyqxmd.com/read/29754114/the-value-of-continuing-professional-development-a-realistic-evaluation-of-a-multi-disciplinary-workshop-for-health-visitors-dealing-with-children-with-complex-needs
#8
Alison Steven, Valerie Larkin, Jane Stewart, Belinda Bateman
BACKGROUND: Continuing Professional Development is important for maintaining and developing knowledge and skills. Evidence regarding direct impact on practice is limited. Existing literature often lacks sufficient detail regarding the initiative or its evaluation, making transferability problematic. OBJECTIVE: To explore the impact and perceived value of multi-disciplinary Continuing Professional Development workshops for Health Visitors who support families with children with complex health needs...
April 21, 2018: Nurse Education Today
https://www.readbyqxmd.com/read/29752876/quantifying-direct-dna-damage-in-the-basal-layer-of-skin-exposed-to-uv-radiation-from-sunbeds
#9
Isla Rose Mary Barnard, Patrick Tierney, Catherine Louise Campbell, Lewis McMillan, Harry Moseley, Ewan Eadie, Christian Tom Alcuin Brown, Kenneth Wood
Non-melanoma and melanoma skin cancers are attributable to DNA damage caused by ultraviolet (UV) radiation exposure. One DNA photoproduct, the Cyclobutane Pyrimidine Dimer (CPD), is believed to lead to DNA mutations caused by UV radiation. Using radiative transfer simulations, we compare the number of CPDs directly induced by UV irradiation from artificial and natural UV sources (a standard sunbed and the midday summer Mediterranean sun) for skin types I and II on the Fitzpatrick scale. We use Monte Carlo Radiative Transfer (MCRT) modelling to track the progression of UV photons through a multi-layered three dimensional (3D) grid that simulates the upper layers of the skin...
May 12, 2018: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/29747179/new-cpd-module-available-online
#10
(no author information available yet)
No abstract text is available yet for this article.
May 11, 2018: British Dental Journal
https://www.readbyqxmd.com/read/29747130/binder-materials-for-the-cathodes-applied-to-self-stratifying-membraneless-microbial-fuel-cell
#11
Xavier Alexis Walter, John Greenman, Ioannis Ieropoulos
The recently developed self-stratifying membraneless microbial fuel cell (SSM-MFC) has been shown as a promising concept for urine treatment. The first prototypes employed cathodes made of activated carbon (AC) and polytetrafluoroethylene (PTFE) mixture. Here, we explored the possibility to substitute PTFE with either polyvinyl-alcohol (PVA) or PlastiDip (CPD; i.e. synthetic rubber) as binder for AC-based cathode in SSM-MFC. Sintered activated carbon (SAC) was also tested due to its ease of manufacturing and the fact that no stainless steel collector is needed...
April 19, 2018: Bioelectrochemistry
https://www.readbyqxmd.com/read/29745227/perovskite-perovskite-homojunctions-via-compositional-doping
#12
Benedikt Dänekamp, Christian Müller, Michael Sendner, Pablo P Boix, Michele Sessolo, Robert Lovrincic, Henk J Bolink
One of the most important properties of semiconductors is the possibility of controlling their electronic behavior via intentional doping. Despite the unprecedented progress in the understanding of hybrid metal halide perovskites, extrinsic doping of perovskite remains nearly unexplored and perovskite-perovskite homojunctions have not been reported. Here we present a perovskite-perovskite homojunction obtained by vacuum deposition of stoichiometrically tuned methylammonium lead iodide (MAPI) films. Doping is realized by adjusting the relative deposition rates of MAI and PbI2 , obtaining p-type (MAI excess) and n-type (MAI defect) MAPI...
May 11, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29736010/mps1-inhibitors-synergise-with-low-doses-of-taxanes-in-promoting-tumour-cell-death-by-enhancement-of-errors-in-cell-division
#13
Ana Rita R Maia, Simon Linder, Ji-Ying Song, Chantal Vaarting, Ute Boon, Colin E J Pritchard, Arno Velds, Ivo J Huijbers, Olaf van Tellingen, Jos Jonkers, René H Medema
BACKGROUND: Chromosomal instability (CIN) is a common trait of cancer characterised by the continuous gain and loss of chromosomes during mitosis. Excessive levels of CIN can suppress tumour growth, providing a possible therapeutic strategy. The Mps1/TTK kinase has been one of the prime targets to explore this concept, and indeed Mps1 inhibitors synergise with the spindle poison docetaxel in inhibiting the growth of tumours in mice. METHODS: To investigate how the combination of docetaxel and a Mps1 inhibitor (Cpd-5) promote tumour cell death, we treated mice transplanted with BRCA1-/- ;TP53-/- mammary tumours with docetaxel and/or Cpd-5...
May 8, 2018: British Journal of Cancer
https://www.readbyqxmd.com/read/29732095/sequential-electron-transfer-governs-the-uv-induced-self-repair-of-dna-photolesions
#14
Rafał Szabla, Holger Kruse, Petr Stadlbauer, Jiří Šponer, Andrzej L Sobolewski
Cyclobutane pyrimidine dimers (CpDs) are among the most common DNA lesions occurring due to the interaction with ultraviolet light. While photolyases have been well known as external factors repairing CpDs, the intrinsic self-repairing capabilities of the GAT 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 1111111111111111111111111111111111 1111111111111111111111111111111111 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 1111111111111111111111111111111111 1111111111111111111111111111111111 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 T DNA sequence were discovered only recently and are still largely obscure...
March 28, 2018: Chemical Science
https://www.readbyqxmd.com/read/29730334/fractional-sunburn-threshold-uvr-doses-generate-equivalent-vitamin-d-and-dna-damage-in-skin-types-i-vi-but-with-epidermal-dna-damage-gradient-correlated-to-skin-darkness
#15
Barbara B Shih, Mark D Farrar, Marcus S Cooke, Joanne Osman, Abigail K Langton, Richard Kift, Ann R Webb, Jacqueline L Berry, Rachel E B Watson, Andy Vail, Frank R de Gruijl, Lesley E Rhodes
Public health guidance recommends limiting sun-exposure to sub-sunburn levels, but it's unknown whether these can gain vitamin D (for musculoskeletal health) whilst avoiding epidermal DNA damage (initiates skin cancer). Well-characterised healthy humans of all skin types (I-VI; lightest to darkest skin) were exposed to a low dose-series of solar simulated UVR of 20-80% their individual sunburn threshold dose (minimal erythemal dose, MED). Significant UVR dose-responses were seen for serum 25(OH)D and whole epidermal CPD, with as little as 0...
May 3, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29730280/impact-of-database-quality-in-knowledge-based-treatment-planning-for-prostate-cancer
#16
Phillip D H Wall, Robert L Carver, Jonas D Fontenot
PURPOSE: This article investigates dose-volume prediction improvements in a common knowledge-based planning (KBP) method using a Pareto plan database compared with using a conventional, clinical plan database. METHODS AND MATERIALS: Two plan databases were created using retrospective, anonymized data of 124 volumetric modulated arc therapy (VMAT) prostate cancer patients. The clinical plan database (CPD) contained planning data from each patient's clinically treated VMAT plan, which were manually optimized by various planners...
March 13, 2018: Practical Radiation Oncology
https://www.readbyqxmd.com/read/29717374/all-in-expansion-of-the-acquisition-of-data-for-outcomes-and-procedure-transfer-adopt-program-to-an-entire-sages-annual-meeting-hands-on-hernia-course
#17
Jonathan Dort, Amber Trickey, John Paige, Erin Schwarz, Tom Cecil, Mark Coleman, Brian Dunkin
BACKGROUND: Continuing professional development (CPD) for the surgeon has been challenging because of a lack of standardized approaches of hands-on courses, resulting in poor post-course outcomes. To remedy this situation, SAGES has introduced the ADOPT program, implementing a standardized, long-term mentoring program as part of its hernia hands-on course. Previous work evaluating the pilot program showed increased adoption of learned procedures as well as increased confidence of the mentored surgeons...
May 1, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29707129/circulating-programmed-death-ligand-1-cpd-l1-in-non-small-cell-lung-cancer-nsclc
#18
Silvia Vecchiarelli, Francesco Passiglia, Armida D'Incecco, Marianna Gallo, Antonella De Luca, Elisa Rossi, Federica D'Incà, Gabriele Minuti, Lorenza Landi, Chiara Bennati, Michela Spreafico, Manolo D'Arcangelo, Valentina Mazza, Nicola Normanno, Federico Cappuzzo
Background: This study aimed at investigating feasibility of programmed death ligand-1 (PD-L1) testing in plasma samples of advanced NSCLC patients receiving first-line treatment, assessing whether circulating (c)PD-L1 levels were modified by the therapy and whether baseline cPD-L1 levels were associated with patients' clinical responses and survival outcome. Methods: Peripheral blood samples were collected from 16 healthy volunteers and 56 newly diagnosed NSCLC patients before and at 12th week during the course of first-line therapy...
April 3, 2018: Oncotarget
https://www.readbyqxmd.com/read/29702258/photodynamic-therapy-does-not-induce-cyclobutane-pyrimidine-dimers-in-the-presence-of-melanin
#19
Shaila Mudambi, Paula Pera, Deschana Washington, Eva Remenyik, Eszter Fidrus, Gal Shafirstein, David Bellnier, Gyorgy Paragh
Photodynamic therapy (PDT) is an office-based treatment for precancerous and early cancerous skin changes. PDT induces cell death through the production of reactive oxygen species (ROS). Cyclobutane pyrimidine dimers (CPDs) are the most important DNA changes responsible for ultraviolet (UV) carcinogenesis. Recently ROS induced by UVA were shown to generate CPDs via activating melanin. This raised the possibility that PDT induced ROS may also induce CPDs and mutagenesis in melanin containing cells. Previously the effect of PDT on CPDs in melanin containing cells has not been assessed...
April 24, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29698913/the-sequence-specificity-of-uv-induced-dna-damage-in-a-systematically-altered-dna-sequence
#20
Clairine V Khoe, Long H Chung, Vincent Murray
The sequence specificity of UV-induced DNA damage was investigated in a specifically designed DNA plasmid using two procedures: end-labelling and linear amplification. Absorption of UV photons by DNA leads to dimerisation of pyrimidine bases and produces two major photoproducts, cyclobutane pyrimidine dimers (CPDs) and pyrimidine(6-4)pyrimidone photoproducts (6-4PPs). A previous study had determined that two hexanucleotide sequences, 5'-GCTC*AC and 5'-TATT*AA, were high intensity UV-induced DNA damage sites...
April 16, 2018: Journal of Photochemistry and Photobiology. B, Biology
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