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https://www.readbyqxmd.com/read/29036902/dna-adducts-formed-by-aristolochic-acid-are-unique-biomarkers-of-exposure-and-explain-the-initiation-phase-of-upper-urothelial-cancer
#1
REVIEW
Marie Stiborová, Volker M Arlt, Heinz H Schmeiser
Aristolochic acid (AA) is a plant alkaloid that causes aristolochic acid nephropathy (AAN) and Balkan endemic nephropathy (BEN), unique renal diseases frequently associated with upper urothelial cancer (UUC). This review summarizes the significance of AA-derived DNA adducts in the aetiology of UUC leading to specific A:T to T:A transversion mutations (mutational signature) in AAN/BEN-associated tumours, which are otherwise rare in individuals with UCC not exposed to AA. Therefore, such DNA damage produced by AA-DNA adducts is one rare example of the direct association of exposure and cancer development (UUC) in humans, confirming that the covalent binding of carcinogens to DNA is causally related to tumourigenesis...
October 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29036859/from-awareness-to-action-sudbury-mining-and-occupational-disease-in-a-time-of-change
#2
Desre M Kramer, D Linn Holness, Emily Haynes, Keith McMillan, Colin Berriault, Sheila Kalenge, Nancy Lightfoot
BACKGROUND: Miners work in highly hazardous environments, but surprisingly, there are more fatalities from occupational diseases, including cancers, than from fatalities from injuries. Over the last few decades, the mining environment has become safer with fewer injuries and less exposure to the toxins that lead to occupational disease. There have been improvements in working conditions, and a reduction in the number of workers exposed, together with an overall improvement in the health of miners...
October 8, 2017: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://www.readbyqxmd.com/read/29036767/the-role-of-glycation-in-the-pathogenesis-of-aging-and-its-prevention-through-herbal-products-and-physical-exercise
#3
Chan-Sik Kim, Sok Park, Junghyun Kim
PURPOSE: Advanced glycation end products (AGEs) are non-enzymatic modifications of proteins or lipids after exposure to sugars. In this review, the glycation process and AGEs are introduced, and the harmful effects of AGEs in the aging process are discussed. METHODS: Results from human and animal studies examining the mechanisms and effects of AGEs are considered. In addition, publications addressing means to attenuate glycation stress through AGE inhibitors or physical exercise are reviewed...
September 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/29036256/pharmacokinetic-comparison-of-once-daily-topical-minocycline-foam-4-vs-oral-minocycline-for-moderate-to-severe-acne
#4
Terry M Jones, Herman Ellman, Tina deVries
OBJECTIVE: To characterize minocycline pharmacokinetics and relative bioavailability following multiple-dose topical administration of minocycline hydrochloride (HCl) foam 4% (FMX101 4%) as compared with single-dose oral administration of minocycline HCl extended-release tablets (Solodyn®) in subjects with moderate-to-severe acne. METHODS: A Phase 1, single-center, nonrandomized, open-label, active-controlled, 2-period, 2-treatment crossover clinical study. The study included 30 healthy adults (mean age, 22...
October 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29036218/crystallographic-and-thermodynamic-characterization-of-phenylaminopyridine-bisphosphonates-binding-to-human-farnesyl-pyrophosphate-synthase
#5
Jaeok Park, Dmitry Rodionov, Joris W De Schutter, Yih-Shyan Lin, Youla S Tsantrizos, Albert M Berghuis
Human farnesyl pyrophosphate synthase (hFPPS) catalyzes the production of the 15-carbon isoprenoid farnesyl pyrophosphate. The enzyme is a key regulator of the mevalonate pathway and a well-established drug target. Notably, it was elucidated as the molecular target of nitrogen-containing bisphosphonates, a class of drugs that have been widely successful against bone resorption disorders. More recently, research has focused on the anticancer effects of these inhibitors. In order to achieve increased non-skeletal tissue exposure, we created phenylaminopyridine bisphosphonates (PNP-BPs) that have bulky hydrophobic side chains through a structure-based approach...
2017: PloS One
https://www.readbyqxmd.com/read/29036215/reduction-of-in-utero-lead-exposures-in-south-african-populations-positive-impact-of-unleaded-petrol
#6
Halina B Röllin, Bukola Olutola, Kalavati Channa, Jon Ø Odland
BACKGROUND: Prenatal exposure to lead (Pb) has been shown to have negative and irreversible health impacts on foetal and early childhood development, affecting morbidity and mortality in adulthood. This study aimed to assess in utero Pb exposure, examine birth outcomes, and identify confounding factors in the large cohort of South African population, following the legislated removal of Pb from petrol. METHODS: Lead was measured in the maternal blood, urine and cord blood using Inductive Coupled Plasma Mass spectrometry (ICP-MS)...
2017: PloS One
https://www.readbyqxmd.com/read/29035714/biodegradation-of-triclosan-in-diatom-navicula-sp-kinetics-transformation-products-toxicity-evaluation-and-the-effects-of-ph-and-potassium-permanganate
#7
Tengda Ding, Kunde Lin, Mengting Yang, Lianjun Bao, Juying Li, Bo Yang, Jay Gan
Triclosan (TCS) is one of the most widely used pharmaceutically active compounds and frequently detected in treated wastewater and the impacted aquatic environment. However, the fate and toxicity of TCS in aquatic organisms is poorly known, including in particular the potential for the formation of incomplete biological transformation products. In this study, TCS posed high toxic effects (e.g., growth inhibition and damage of photosynthesis) to typical freshwater diatom Navicula sp., with the 24h and 72h EC50 values of 173...
September 21, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29035713/an-overview-of-chemical-additives-present-in-plastics-migration-release-fate-and-environmental-impact-during-their-use-disposal-and-recycling
#8
REVIEW
John N Hahladakis, Costas A Velis, Roland Weber, Eleni Iacovidou, Phil Purnell
Over the last 60 years plastics production has increased manifold, owing to their inexpensive, multipurpose, durable and lightweight nature. These characteristics have raised the demand for plastic materials that will continue to grow over the coming years. However, with increased plastic materials production, comes increased plastic material wastage creating a number of challenges, as well as opportunities to the waste management industry. The present overview highlights the waste management and pollution challenges, emphasising on the various chemical substances (known as "additives") contained in all plastic products for enhancing polymer properties and prolonging their life...
October 9, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29035523/current-stormwater-harvesting-guidelines-are-inadequate-for-mitigating-risk-from-campylobacter-during-non-potable-reuse-activities
#9
Heather Murphy, Ze Meng, Rebekah Henry, Ana Deletic, David Mccarthy
Campylobacter is a pathogen frequently detected in urban stormwater worldwide. It is one of the leading causes of enteric disease in many developed countries and is the leading cause of enteric disease in Australia. Prior to harvesting stormwater, adequate treatment is necessary to mitigate risks derived from such harmful pathogens. The goal of this research was to estimate the health risks associated with the exposure to Campylobacter when harvesting urban stormwater for toilet flushing and irrigation activities, and the role treatment options play in limiting risks...
October 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29035403/-polymorphism-of-genes-encoding-proteins-of-dna-repair-vs-occupational-and-environmental-exposure-to-lead-arsenic-and-pesticides
#10
REVIEW
Karol Bukowski, Katarzyna Woźniak
Genetic polymorphism is associated with the occurrence of at least 2 different alleles in the locus with a frequency higher than 1% in the population. Among polymorphisms we can find single nucleotide polymorphism (SNP) and polymorphism of variable number of tandem repeats. The presence of certain polymorphisms in genes encoding DNA repair enzymes is associated with the speed and efficiency of DNA repair and can protect or expose humans to the effects provoked by xenobiotics. Chemicals, such as lead, arsenic pesticides are considered to exhibit strong toxicity...
October 12, 2017: Medycyna Pracy
https://www.readbyqxmd.com/read/29035157/evaluation-of-serum-levels-of-c3-and-c4-complement-factors-in-patients-with-beta-thalassemia-major-in-khuzestan-province-southwest-iran
#11
Mehri Ghafourian, Mehrnosh Esmaeili, Alireza Sadeghi, Ali Malekei Naseri, Nader Dashti-Gerdabi
BACKGROUND AND OBJECTIVES: Thalassemia syndrome is the most common genetic disorder in the world and infection is the second cause of death in these patients. Measurement of serum C3 and C4 complement factors in serum was done in 60 patients with beta-thalassemia major in comparison with 30 healthy subjects as control group. MATERIALS AND METHODS: The serum level of C3 and C4 complement factors in 60 patients with beta-thalassemia major who were randomly selected from among the patients referred to Shafa Hospital of Ahvaz was evaluated and compared with 30 samples from healthy individuals with no history of recent infectious or autoimmune diseases...
October 16, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/29034330/perinatal-bisphenol-a-exposure-induces-chronic-inflammation-in-rabbit-offspring-via-modulation-of-gut-bacteria-and-their-metabolites
#12
Lavanya Reddivari, D N Rao Veeramachaneni, William A Walters, Catherine Lozupone, Jennifer Palmer, M K Kurundu Hewage, Rohil Bhatnagar, Amnon Amir, Mary J Kennett, Rob Knight, Jairam K P Vanamala
Bisphenol A (BPA) accumulates in the maturing gut and liver in utero and is known to alter gut bacterial profiles in offspring. Gut bacterial dysbiosis may contribute to chronic colonic and systemic inflammation. We hypothesized that perinatal BPA exposure-induced intestinal (and liver) inflammation in offspring is due to alterations in the microbiome and colonic metabolome. The 16S rRNA amplicon sequencing analysis revealed differences in beta diversity with a significant reduction in the relative abundances of short-chain fatty acid (SCFA) producers such as Oscillospira and Ruminococcaceae due to BPA exposure...
September 2017: MSystems
https://www.readbyqxmd.com/read/29034247/regular-exposure-to-cowbells-affects-the-behavioral-reactivity-to-a-noise-stimulus-in-dairy-cows
#13
Julia Johns, Sophie Masneuf, Antonia Patt, Edna Hillmann
In alpine regions, cows are often equipped with bells during pasture season to ensure that farmers can locate them. Constant exposure to the chime of a bell may affect cows' acoustic perception in general. The aim of this study is to test whether routine bell exposure affects the reactivity to a noise stimulus and might be associated with hearing impairment in cows. For the assessment, behavioral and cardiac indicators were used as indirect measures of hearing capacity. Cows that were either used to wearing a bell or not were exposed to a playback of low and high amplitude (=varying loudness)...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29034097/the-association-between-cadmium-and-lead-exposure-and-blood-pressure-among-workers-of-a-smelting-industry-a-cross-sectional-study
#14
Hyun Chan An, Joo Hyun Sung, Jiho Lee, Chang Sun Sim, Sang Hoon Kim, Yangho Kim
BACKGROUND: Lead and cadmium are harmful heavy metals that are used for a variety of occupational purposes. Considering their potentially hazardous effects on health, studies on the association between exposure to these two heavy metals and health disorders have been actively conducted. This study aimed to determine the association between blood lead and cadmium levels and blood pressure in workers exposed to lead and cadmium in a smelter. METHODS: Nine hundred and sixty-three male workers who worked in a smelter, and underwent medical examinations at the Ulsan University Hospital between January 1 and December 31, 2014, were selected as participants...
2017: Annals of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29034064/personalized-therapy-against-preeclampsia-by-replenishing-placental-protein-13-pp13-targeted-to-patients-with-impaired-pp13-molecule-or-function
#15
REVIEW
Hamutal Meiri, George Osol, Irene Cetin, Sveinbjörn Gizurarson, Berthold Huppertz
Hypertensive disorders affect about one third of all people aged 20 and above, and are treated with anti-hypertensive drugs. Preeclampsia (PE) is one form of such disorders that only develops during pregnancy. It affects ten million pregnant women globally and additionally causes fetal loss and major newborn disabilities. The syndrome's origin is multifactorial, and anti-hypertensive drugs are ineffective in treating it. Biomarkers are helpful for predict its development. Generic drugs, such as low dose aspirin, were proven effective in preventing preterm PE...
2017: Computational and Structural Biotechnology Journal
https://www.readbyqxmd.com/read/29033913/biochemical-function-molecular-structure-and-evolution-of-an-atypical-thioredoxin-reductase-from-desulfovibrio-vulgaris
#16
Odile Valette, Tam T T Tran, Christine Cavazza, Elodie Caudeville, Gaël Brasseur, Alain Dolla, Emmanuel Talla, Laetitia Pieulle
Thioredoxin reductase (TR) regulates the intracellular redox environment by reducing thioredoxin (Trx). In anaerobes, recent findings indicate that the Trx redox network is implicated in the global redox regulation of metabolism but also actively participates in protecting cells against O2. In the anaerobe Desulfovibrio vulgaris Hildenborough (DvH), there is an intriguing redundancy of the Trx system which includes a classical system using NADPH as electron source, a non-canonical system using NADH and an isolated TR (DvTRi)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29033899/environmental-factors-contribute-to-%C3%AE-cell-endoplasmic-reticulum-stress-and-neo-antigen-formation-in-type-1-diabetes
#17
Meghan L Marré, Jon D Piganelli
Type 1 diabetes (T1D) is an autoimmune disease in which immune-mediated targeting and destruction of insulin-producing pancreatic islet β cells leads to chronic hyperglycemia. There are many β cell proteins that are targeted by autoreactive T cells in their native state. However, recent studies have demonstrated that many β cell proteins are recognized as neo-antigens following posttranslational modification (PTM). Although modified neo-antigens are well-established targets of pathology in other autoimmune diseases, the effects of neo-antigens in T1D progression and the mechanisms by which they are generated are not well understood...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29033803/moderate-maternal-alcohol-exposure-on-gestational-day-12-impacts-anxiety-like-behavior-in-offspring
#18
Siara K Rouzer, Jesse M Cole, Julia M Johnson, Elena I Varlinskaya, Marvin R Diaz
Among the numerous consequences of prenatal alcohol exposure (PAE) is an increase in anxiety-like behavior that can prove debilitating to daily functioning. A significant body of literature has linked gestational day 12 (G12) heavy ethanol exposure with social anxiety, evident in adolescent males and females. However, the association between non-social anxiety-like behavior and moderate alcohol exposure, a more common pattern of drinking in pregnant women, is yet unidentified. To model moderate PAE (mPAE), we exposed pregnant Sprague-Dawley rats to either room air or vaporized ethanol for 6 h on G12...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29033789/stress-and-corticosteroids-modulate-muscarinic-long-term-potentiation-mltp-in-the-hippocampus
#19
Efrat Shavit Stein, Ze'Ev Itsekson Hayosh, Andreas Vlachos, Nicola Maggio
Stress influences synaptic plasticity, learning and memory in a steroid hormone receptor dependent manner. Based on these findings it has been proposed that stress could be a major risk factor for the development of cognitive decline and dementia. Interestingly, evidence has been provided that stress also affects muscarinic, i.e., acetylcholine (ACh)-mediated neurotransmission. To learn more about the impact of stress and steroids on synaptic plasticity, in this study, we investigated the effects of stress on muscarinic long term potentiation (mLTP)...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29033558/effect-of-surface-organic-coatings-of-cellulose-nanocrystals-on-the-viability-of-mammalian-cell-lines
#20
Ambar S Jimenez, Francesca Jaramillo, Usha D Hemraz, Yaman Boluk, Karina Ckless, Rajesh Sunasee
Cellulose nanocrystals (CNCs) have emerged as promising candidates for a number of bio-applications. Surface modification of CNCs continues to gain significant research interest as it imparts new properties to the surface of the nanocrystals for the design of multifunctional CNCs-based materials. A small chemical surface modification can potentially lead to drastic behavioral changes of cell-material interactions thereby affecting the intended bio-application. In this work, unmodified CNCs were covalently decorated with four different organic moieties such as a diaminobutane fragment, a cyclic oligosaccharide (β-cyclodextrin), a thermoresponsive polymer (poly[N-isopropylacrylamide]), and a cationic aminomethacrylamide-based polymer using different synthetic covalent methods...
2017: Nanotechnology, Science and Applications
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