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https://www.readbyqxmd.com/read/28339846/estimation-of-whole-body-radiation-exposure-from-brachytherapy-for-oral-cancer-using-a-monte-carlo-simulation
#1
Y Ozaki, H Watanabe, A Kaida, M Miura, K Nakagawa, K Toda, R Yoshimura, Y Sumi, T Kurabayashi
Early stage oral cancer can be cured with oral brachytherapy, but whole-body radiation exposure status has not been previously studied. Recently, the International Commission on Radiological Protection Committee (ICRP) recommended the use of ICRP phantoms to estimate radiation exposure from external and internal radiation sources. In this study, we used a Monte Carlo simulation with ICRP phantoms to estimate whole-body exposure from oral brachytherapy. We used a Particle and Heavy Ion Transport code System (PHITS) to model oral brachytherapy with 192Ir hairpins and 198Au grains and to perform a Monte Carlo simulation on the ICRP adult reference computational phantoms...
February 24, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/28335412/ameliorative-effects-of-neutral-electrolyzed-water-on-growth-performance-biochemical-constituents-and-histopathological-changes-in-turkey-poults-during-aflatoxicosis
#2
Denise Gómez-Espinosa, Francisco Javier Cervantes-Aguilar, Juan Carlos Del Río-García, Tania Villarreal-Barajas, Alma Vázquez-Durán, Abraham Méndez-Albores
Different in vitro and in silico approaches from our research group have demonstrated that neutral electrolyzed water (NEW) can be used to detoxify aflatoxins. The objective of this investigation was to evaluate the ability of NEW to detoxify B-aflatoxins (AFB₁ and AFB₂) in contaminated maize and to confirm detoxification in an in vivo experimental model. Batches of aflatoxin-contaminated maize were detoxified with NEW and mixed in commercial feed. A total of 240 6-day-old female large white Nicholas-700 turkey poults were randomly divided into four treatments of six replicates each (10 turkeys per replicate), which were fed ad libitum for two weeks with the following dietary treatments: (1) control feed containing aflatoxin-free maize (CONTROL); (2) feed containing the aflatoxin-contaminated maize (AF); (3) feed containing the aflatoxin-contaminated maize detoxified with NEW (AF + NEW); and (4) control feed containing aflatoxin-free maize treated with NEW (NEW)...
March 14, 2017: Toxins
https://www.readbyqxmd.com/read/28335209/dye-doped-fluorescent-silica-nanoparticles-for-live-cell-and-in-vivo-bioimaging
#3
REVIEW
Wen-Han Zhang, Xiao-Xiao Hu, Xiao-Bing Zhang
The need for novel design strategies for fluorescent nanomaterials to improve our understanding of biological activities at the molecular level is increasing rapidly. Dye-doped fluorescent silica nanoparticles (SiNPs) emerge with great potential for developing fluorescence imaging techniques as a novel and ideal platform for the monitoring of living cells and the whole body. Organic dye-containing fluorescent SiNPs exhibit many advantages: they have excellent biocompatibility, are non-toxic, highly hydrophilic, optically transparent, size-tunable and easily modified with various biomolecules...
April 27, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334684/biochemical-signaling-by-remote-ischemic-conditioning-of-the-arm-versus-thigh-is-one-raise-of-the-cuff-enough
#4
Cameron Dezfulian, Maia Taft, Catherine Corey, Gabrielle Hill, Nicholas Krehel, Jon C Rittenberger, Frank X Guyette, Sruti Shiva
Remote Ischemic Conditioning (RIC), induced by brief cycles of ischemia and reperfusion, protects vital organs from a prolonged ischemic insult. While several biochemical mediators have been implicated in RIC's mechanism of action, it remains unclear whether the localization or "dose" of RIC affects the extent of protective signaling. In this randomized crossover study of healthy individuals, we tested whether the number of cycles of RIC and its localization (arm versus thigh) determines biochemical signaling and cytoprotection...
March 18, 2017: Redox Biology
https://www.readbyqxmd.com/read/28334503/the-fetal-safety-of-clomiphene-citrate-a-population-based-retrospective-cohort-study
#5
Asher Weller, Sharon Daniel, Gideon Koren, Eitan Lunenfeld, Amalia Levy
OBJECTIVE: To evaluate whether exposure to CC for ovulation induction is associated with either overall major malformations or specific fetal anomalies. DESIGN: We conducted a population-based retrospective cohort. Exposure was defined as CC dispension from two months before conception through the first month of pregnancy. SETTINGS: Four databases were combined: medication, birth, hospitalization and pregnancy terminations. POPULATION: The study included all women in southern Israel who gave birth or underwent pregnancy termination at Soroka Medical Center from 1998 to 2009...
March 23, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28334384/the-cancer-paradigms-of-mammalian-regeneration-can-mammals-regenerate-as-amphibians
#6
Rachel Sarig, Eldad Tzahor
Regeneration in mammals is restricted to distinct tissues and occurs mainly by expansion and maturation of resident stem cells. During regeneration, even subtle mutations in the proliferating cells may cause a detrimental effect by eliciting abnormal differentiation or malignant transformation. Indeed, cancer in mammals has been shown to arise through deregulation of stem cells maturation, which often leads to a differentiation block and cell transformation. In contrast, lower organisms such as amphibians retain a remarkable regenerative capacity in various organs, which occurs via de- and re-differentiation of mature cells...
March 15, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28334102/predation-by-bdellovibrio-bacteriovorus-significantly-reduces-viability-and-alters-the-microbial-community-composition-of-activated-sludge-flocs-and-granules
#7
Shugeng Feng, Chuan Hao Tan, Florentin Constancias, Gurjeet S Kohli, Yehuda Cohen, Scott A Rice
We recently isolated and characterized a predatory Bdellovibrio bacteriovorus strain from activated sludge (Ulu Pandan Water Reclamation Plant, Singapore), and this strain, B. bacteriovorus UP was able to prey upon a broad spectrum of bacterial isolates from the activated sludge when grown as planktonic cells or as biofilms. Here, we have tested the effect of Bdellovibrio predation on floccular and granular sludge to determine if the spatial organization, loosely or tightly aggregated communities, was protective from predation...
February 21, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28333661/does-your-drug-expertise-include-clinical-pharmaceutics
#8
David W Newton
Whose job is it to protect patients from harm from drug instabilities and incompatibilities and other aspects of clinical pharmaceutics? Pharmacists are better educated via multiple required general and organic chemistry prerequisite and professional curricula medicinal chemistry and pharmaceutics courses. Therefore, no healthcare professional other than pharmacists are nicknamed drug experts or are better formally educated to master drug chemistry in the bottle (i.e., injection stability and compatibility/incompatibility clinical pharmaceutics) as a prerequisite for drug administration to cause safe and effective drug chemistry in the body (i...
May 2016: International Journal of Pharmaceutical Compounding
https://www.readbyqxmd.com/read/28333395/small-molecules-belowground-the-role-of-specialized-metabolites-in-the-rhizosphere
#9
Hassan Massalha, Elisa Korenblum, Dorothea Tholl, Asaph Aharoni
Soil communities are diverse taxonomically and functionally. This ecosystem experiences highly complex networks of interactions, but may also present functionally independent entities. Plant roots, a metabolically active hotspot in the soil, take an essential part in belowground interactions. While plants are known to release an extremely high portion of the fixated carbon to the soil, less is known about the composition and role of C-containing compounds in the rhizosphere, in particular those involved in chemical communication...
March 23, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28333091/marine-peptides-as-potential-agents-for-the-management-of-type-2-diabetes-mellitus-a-prospect
#10
REVIEW
En-Qin Xia, Shan-Shan Zhu, Min-Jing He, Fei Luo, Cheng-Zhan Fu, Tang-Bin Zou
An increasing prevalence of diabetes is known as a main risk for human health in the last future worldwide. There is limited evidence on the potential management of type 2 diabetes mellitus using bioactive peptides from marine organisms, besides from milk and beans. We summarized here recent advances in our understanding of the regulation of glucose metabolism using bioactive peptides from natural proteins, including regulation of insulin-regulated glucose metabolism, such as protection and reparation of pancreatic β-cells, enhancing glucose-stimulated insulin secretion and influencing the sensitivity of insulin and the signaling pathways, and inhibition of bioactive peptides to dipeptidyl peptidase IV, α-amylase and α-glucosidase activities...
March 23, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28332757/selective-modes-determine-evolutionary-rates-gene-compactness-and-expression-patterns-in-brassica
#11
Yue Guo, Jing Liu, Jiefu Zhang, Shengyi Liu, Jianchang Du
It has been well documented that most nuclear protein-coding genes in organisms can be classified into two categories, i.e., positively selected genes (PSGs) and negatively selected genes (NSGs). The characteristics and evolutionary fates of different types of genes, however, have been poorly understood. In this study, the rates of nonsynonymous substitution (Ka) and the synonymous substitution (Ks) were investigated by comparing the orthologs between the two sequenced Brassica species, Brassica rapa, and Brassica oleracea, and the evolutionary rates, gene structures, expression patterns, and codon bias were compared between PSGs and NSGs...
March 23, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28332729/transplantation-of-kidneys-from-hepatitis-c-positive-donors-into-hepatitis-c-virus-infected-recipients-followed-by-early-initiation-of-direct-acting-antiviral-therapy-a-single-center-retrospective-study
#12
Kalyan Ram Bhamidimarri, Marco Ladino, Fernando Pedraza, Giselle Guerra, Adela Mattiazzi, Linda Chen, Gaetano Ciancio, Warren Kupin, Paul Martin, George Burke, David Roth
The availability of direct acting antiviral agents (DAA) has transformed the treatment of hepatitis C virus (HCV) infection. The current study is a case series that reports the outcomes from a cohort of twenty-five HCV-infected ESRD patients who received a kidney from an anti-HCV-positive deceased organ donor followed by treatment with DAAs in the early post-transplant period. Time to transplantation and the efficacy of DAA therapy as measured by sustained viral response at 12 weeks were assessed. The median waiting time from original date of activation on the UNOS waiting list until transplantation was 427 days, however, the median time from entering the patient into UNet(sm) for a HCV positive offer until transplantation was only 58 days...
March 23, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28332570/iron-minerals-within-specific-microfossil-morphospecies-of-the-1-88%C3%A2-ga-gunflint-formation
#13
Kevin Lepot, Ahmed Addad, Andrew H Knoll, Jian Wang, David Troadec, Armand Béché, Emmanuelle J Javaux
Problematic microfossils dominate the palaeontological record between the Great Oxidation Event 2.4 billion years ago (Ga) and the last Palaeoproterozoic iron formations, deposited 500-600 million years later. These fossils are often associated with iron-rich sedimentary rocks, but their affinities, metabolism, and, hence, their contributions to Earth surface oxidation and Fe deposition remain unknown. Here we show that specific microfossil populations of the 1.88 Ga Gunflint Iron Formation contain Fe-silicate and Fe-carbonate nanocrystal concentrations in cell interiors...
March 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28332461/global-public-goods-for-health-weaknesses-and-opportunities-in-the-global-health-system
#14
Suerie Moon, John-Arne Røttingen, Julio Frenk
Since at least the 1990s, there has been growing recognition that societies need global public goods (GPGs) in order to protect and promote public health. While the term GPG is sometimes used loosely to denote that which is 'good' for the global public, we restrict our use of the term to its technical definition (goods that are non-excludable and non-rival in consumption) for its useful analytical clarity. Examples of important GPGs for health include standards and guidelines, research on the causes and treatment of disease, and comparative evidence and analysis...
April 2017: Health Economics, Policy, and Law
https://www.readbyqxmd.com/read/28332231/development-of-humanized-mice-in-the-age-of-genome-editing
#15
Vishnu Hosur, Benjamin E Low, Cindy Avery, Leonard D Shultz, Michael V Wiles
Mice are the most commonly used model organisms to study human disease. Many genetic human diseases can be recapitulated by modifying the mouse genome, which permits testing of existing and novel therapeutics, including combinatorial therapeutics, without putting humans at risk. Specifically, the development of "humanized" mice, i.e., severely immunodeficient mice engrafted with functional human hematopoietic and immune cells and tissues, has revolutionized our ability to study and model human diseases in preclinical in vivo systems...
March 22, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28332181/involvement-of-testicular-daam1-expression-in-zinc-protection-against-cadmium-induced-male-rat-reproductive-toxicity
#16
Marouane Chemek, Massimo Venditti, Sana Boughamoura, Safa Ben Mimouna, Imed Messaoudi, Sergio Minucci
In order to verify the effects of exposure to Cd and Zn on testicular DAAM1 gene and protein expression and also to ascertain their involvement in the protective role of Zn in prevent the testicular toxicity Cd-induced in male offspring rats at adult age after gestational and lactational exposure, male offspring rats, from mothers receiving either tap water, Cd, Zn or Cd + Zn during gestation and lactation periods, were scarified on postnatal days (PND) 70. The reproductive organ (testis, epididymis and vesicle seminal) were collected, weighed and analysed...
March 23, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28332093/pathogenic-implications-of-distinct-patterns-of-iron-and-zinc-in-chronic-ms-lesions
#17
Bogdan F Popescu, Josa M Frischer, Samuel M Webb, Mylyne Tham, Reginald C Adiele, Christopher A Robinson, Patrick D Fitz-Gibbon, Stephen D Weigand, Imke Metz, Susan Nehzati, Graham N George, Ingrid J Pickering, Wolfgang Brück, Simon Hametner, Hans Lassmann, Joseph E Parisi, Guo Yong, Claudia F Lucchinetti
Multiple sclerosis (MS) is a chronic inflammatory demyelinating disease of the central nervous system (CNS) in which oligodendrocytes, the CNS cells that stain most robustly for iron and myelin are the targets of injury. Metals are essential for normal CNS functioning, and metal imbalances have been linked to demyelination and neurodegeneration. Using a multidisciplinary approach involving synchrotron techniques, iron histochemistry and immunohistochemistry, we compared the distribution and quantification of iron and zinc in MS lesions to the surrounding normal appearing and periplaque white matter, and assessed the involvement of these metals in MS lesion pathogenesis...
March 22, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28331779/reply-to-the-efsa-2016-on-the-relevance-of-recent-publications-hofmann-et-al-2014-2016-on-environmental-risk-assessment-and-management-of-bt-maize-events-mon810-bt11-and-1507
#18
EDITORIAL
Maren Kruse-Plass, Frieder Hofmann, Ulrike Kuhn, Mathias Otto, Ulrich Schlechtriemen, Boris Schröder, Rudolf Vögel, Werner Wosniok
In this commentary, we respond to a report of the EFSA GMO Panel (EFSA EFSA Supp Publ, 1) that criticises the outcomes of two studies published in this journal (Hofmann et al. Environ Sci Eur 26: 24, 2; Environ Sci Eur 28: 14, 3). Both publications relate to the environmental risk assessment and management of Bt-maize, including maize events MON810, Bt11 and maize 1507. The results of Hofmann et al. (Environ Sci Eur 26: 24, 2), using standardised pollen mass filter deposition measurements, indicated that the EFSA Panel model had underestimated pollen deposition and, hence, exposure of non-target organisms to Bt-maize pollen...
2017: Environmental Sciences Europe
https://www.readbyqxmd.com/read/28331623/gum-arabic-as-novel-anti-oxidant-agent-in-sickle-cell-anemia-phase-ii-trial
#19
Lamis Kaddam, Imad Fadl-Elmula, Omer Ali Eisawi, Haydar Awad Abdelrazig, Mohammed Abdelraman Salih, Florian Lang, Amal M Saeed
BACKGROUND: Sickle cell anemia patients suffer from oxidative stress due to chronic inflammation and self-oxidation of sickle hemoglobin (Hb S). Chronic oxidative stress contributes to endothelial dysfunction, inflammation and multiple organ damage in sickle cell disease (SCD). Thus, antioxidant medication may favorably influence the disease. Gum Arabic (GA), edible, dried, gummy exudates from Acacia Senegal tree, has been claimed to act as an anti-oxidant and cytoprotective agent, protecting against experimental hepatic, renal and cardiac toxicities in rats...
2017: BMC Hematology
https://www.readbyqxmd.com/read/28331098/recombinant-modified-vaccinia-virus-ankara-generating-ebola-virus-like-particles
#20
Marc Schweneker, Andrea S Laimbacher, Gert Zimmer, Susanne Wagner, Elisabeth M Schraner, Michael Wolferstätter, Marieken Klingenberg, Ulrike Dirmeier, Robin Steigerwald, Henning Lauterbach, Hubertus Hochrein, Paul Chaplin, Mark Suter, Jürgen Hausmann
There are currently no approved therapeutics or vaccines to treat or protect against the severe hemorrhagic fever and death caused by Ebola virus (EBOV). Ebola virus-like particles (EBOV-VLPs) consisting of the matrix protein VP40, the glycoprotein (GP) and the nucleoprotein (NP) are highly immunogenic and protective in non-human primates against Ebola virus disease (EVD). We have constructed a modified vaccinia virus Ankara-Bavarian Nordic(®) (MVA-BN(®)) recombinant co-expressing VP40 and glycoprotein (GP) of EBOV Mayinga and the nucleoprotein (NP) of Taï Forest virus (TAFV) (MVA-BN-EBOV-VLP) to launch non-infectious EBOV-VLPs as a second vaccine modality in the MVA-BN-EBOV-VLP-vaccinated organism...
March 22, 2017: Journal of Virology
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