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https://www.readbyqxmd.com/read/29217848/a-radio-frequency-radiation-exposure-system-for-rodents-based-on-reverberation-chambers
#1
Myles Capstick, Niels Kuster, Sven Kuehn, Veronica Berdinas-Torres, Yijian Gong, Perry Wilson, John Ladbury, Galen Koepke, David L McCormick, James Gauger, Ronald L Melnick
In this paper we present the novel design features, their technical implementation, and an evaluation of the radio Frequency (RF) exposure systems developed for the National Toxicology Program (NTP) of the National Institute of Environmental Health Sciences (NIEHS) studies on the potential toxicity and carcinogenicity of 2nd and 3rd generation mobile-phone signals. The system requirements for this 2-year NTP cancer bioassay study were the tightly-controlled lifetime exposure of rodents (1568 rats and 1512 mice) to three power levels plus sham simulating typical daily, and higher, exposures of users of GSM and CDMA (IS95) signals...
August 2017: IEEE Transactions on Electromagnetic Compatibility
https://www.readbyqxmd.com/read/29190471/influence-of-shape-and-dispersion-media-of-titanium-dioxide-nanostructures-on-microvessel-network-and-ossification
#2
Verónica Freyre-Fonseca, Estefany I Medina-Reyes, Darío I Téllez-Medina, Gloria L Paniagua-Contreras, Eric Monroy-Pérez, Felipe Vaca-Paniagua, Norma L Delgado-Buenrostro, José O Flores-Flores, Edgar O López-Villegas, Gustavo F Gutiérrez-López, Yolanda I Chirino
Titanium dioxide nanoparticles (TiO2 NPs) production has been used for pigment, food and cosmetic industry and more recently, shaped as belts for treatment of contaminated water, self-cleaning windows and biomedical applications. However, the toxicological data have demonstrated that TiO2 NPs inhalation induce inflammation in in vivo models and in vitro exposure leads to cytotoxicity and DNA damage. Dermal exposure has limited adverse effects and the possible risks for implants used for tissue regeneration is still under research...
November 23, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29150198/comparative-effectiveness-of-extended-release-naltrexone-versus-buprenorphine-naloxone-for-opioid-relapse-prevention-x-bot-a-multicentre-open-label-randomised-controlled-trial
#3
Joshua D Lee, Edward V Nunes, Patricia Novo, Ken Bachrach, Genie L Bailey, Snehal Bhatt, Sarah Farkas, Marc Fishman, Phoebe Gauthier, Candace C Hodgkins, Jacquie King, Robert Lindblad, David Liu, Abigail G Matthews, Jeanine May, K Michelle Peavy, Stephen Ross, Dagmar Salazar, Paul Schkolnik, Dikla Shmueli-Blumberg, Don Stablein, Geetha Subramaniam, John Rotrosen
BACKGROUND: Extended-release naltrexone (XR-NTX), an opioid antagonist, and sublingual buprenorphine-naloxone (BUP-NX), a partial opioid agonist, are pharmacologically and conceptually distinct interventions to prevent opioid relapse. We aimed to estimate the difference in opioid relapse-free survival between XR-NTX and BUP-NX. METHODS: We initiated this 24 week, open-label, randomised controlled, comparative effectiveness trial at eight US community-based inpatient services and followed up participants as outpatients...
November 14, 2017: Lancet
https://www.readbyqxmd.com/read/29149859/medicinal-plants-used-by-women-in-mecca-urban-muslim-and-gendered-knowledge
#4
Afnan Alqethami, Julie A Hawkins, Irene Teixidor-Toneu
BACKGROUND: This study explores medicinal plant knowledge and use among Muslim women in the city of Mecca, Saudi Arabia. Ethnobotanical research in the region has focused on rural populations and male herbal healers in cities, and based on these few studies, it is suggested that medicinal plant knowledge may be eroding. Here, we document lay, female knowledge of medicinal plants in an urban centre, interpreting findings in the light of the growing field of urban ethnobotany and gendered knowledge and in an Islamic context...
November 17, 2017: Journal of Ethnobiology and Ethnomedicine
https://www.readbyqxmd.com/read/29149660/a-systems-level-approach-for-investigating-organophosphorus-pesticide-toxicity
#5
Jingbo Zhu, Jing Wang, Yan Ding, Baoyue Liu, Wei Xiao
The full understanding of the single and joint toxicity of a variety of organophosphorus (OP) pesticides is still unavailable, because of the extreme complex mechanism of action. This study established a systems-level approach based on systems toxicology to investigate OP pesticide toxicity by incorporating ADME/T properties, protein prediction, and network and pathway analysis. The results showed that most OP pesticides are highly toxic according to the ADME/T parameters, and can interact with significant receptor proteins to cooperatively lead to various diseases by the established OP pesticide -protein and protein-disease networks...
November 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29149350/a-data-fusion-pipeline-for-generating-and-enriching-adverse-outcome-pathway-descriptions
#6
Penny Nymark, Linda Rieswijk, Friederike Ehrhart, Nina Jeliazkova, Georgia Tsiliki, Haralambos Sarimveis, Chris T Evelo, Vesa Hongisto, Pekka Kohonen, Egon Willighagen, Roland C Grafström
Increasing amounts of systems toxicology data, including omics results, are becoming publically available and accessible in databases. Data-driven and informatics-tool supported pipeline schemas for fitting such data into Adverse Outcome Pathway (AOP) descriptions could potentially aid the development of non-animal based hazard and risk assessment methods. We devised a six-step workflow that integrated diverse types of toxicology data into a novel AOP scheme for pulmonary fibrosis. Mining of literature references and diverse data sources covering previous pathway descriptions and molecular results were coupled in a stepwise manner with informatics tools applications that enabled gene linkage and pathway identification in molecular interaction maps...
November 15, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29114260/crosstalk-between-receptor-and-non-receptor-mediated-chemical-modes-of-action-in-rat-livers-converges-through-a-dysregulated-gene-expression-network-at-tumor-suppressor-tp53
#7
Karen M Funderburk, Scott S Auerbach, Pierre R Bushel
Chemicals, toxicants, and environmental stressors mediate their biologic effect through specific modes of action (MOAs). These encompass key molecular events that lead to changes in the expression of genes within regulatory pathways. Elucidating shared biologic processes and overlapping gene networks will help to better understand the toxicologic effects on biological systems. In this study we used a weighted network analysis of gene expression data from the livers of male Sprague-Dawley rats exposed to chemicals that elicit their effects through receptor-mediated MOAs (aryl hydrocarbon receptor, orphan nuclear hormone receptor, or peroxisome proliferator-activated receptor-α) or non-receptor-mediated MOAs (cytotoxicity or DNA damage)...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/29106658/investigating-the-generalizability-of-the-multiflow%C3%A2-dna-damage-assay-and-several-companion-machine-learning-models-with-a-set-of-103-diverse-test-chemicals
#8
Steven M Bryce, Derek T Bernacki, Stephanie L Smith-Roe, Kristine L Witt, Jeffrey C Bemis, Stephen D Dertinger
The in vitro MultiFlow® DNA Damage assay multiplexes p53, γH2AX, phospho-histone H3, and polyploidization biomarkers into one flow cytometric analysis (Bryce et al., 2016). The work reported herein evaluated the generalizability of the method, as well as several data analytics strategies, to a range of chemical classes not studied previously. TK6 cells were exposed to each of 103 diverse chemicals, 86 of which were supplied by the National Toxicology Program (NTP) and selected based upon responses in genetic damage assays conducted under the Tox21 program...
November 2, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29056366/natural-modulators-of-nonalcoholic-fatty-liver-disease-mode-of-action-analysis-and-in-silico-adme-tox-prediction
#9
Merilin Al Sharif, Petko Alov, Vessela Vitcheva, Antonia Diukendjieva, Mattia Mori, Bruno Botta, Ivanka Tsakovska, Ilza Pajeva
Nonalcoholic fatty liver disease (NAFLD) is considered to be the most common chronic liver disease. The discovery of natural product-based NAFLD modulators requires a more comprehensive study of their modes of action (MoAs). In this study we analysed available in the literature data for 26 naturally-derived compounds associated with experimental evidence for NAFLD alleviation and outlined potential biomolecular targets and a network of pharmacological MoAs for 12 compounds with the highest number of experimentally supported MoA key events, modulated by them...
December 15, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28968186/development-and-therapeutic-potential-of-small-molecule-modulators-of-circadian-systems
#10
Zheng Chen, Seung-Hee Yoo, Joseph S Takahashi
Circadian timekeeping systems drive oscillatory gene expression to regulate essential cellular and physiological processes. When the systems are perturbed, pathological consequences ensue and disease risks rise. A growing number of small-molecule modulators have been reported to target circadian systems. Such small molecules, identified via high-throughput screening or derivatized from known scaffolds, have shown promise as drug candidates to improve biological timing and physiological outputs in disease models...
October 2, 2017: Annual Review of Pharmacology and Toxicology
https://www.readbyqxmd.com/read/28934561/epigenetic-mechanisms-regulating-adaptive-responses-to-targeted-kinase-inhibitors-in-cancer
#11
Steven P Angus, Jon S Zawistowski, Gary L Johnson
Although targeted inhibition of oncogenic kinase drivers has achieved remarkable patient responses in many cancers, the development of resistance has remained a significant challenge. Numerous mechanisms have been identified, including the acquisition of gatekeeper mutations, activating pathway mutations, and copy number loss or gain of the driver or alternate nodes. These changes have prompted the development of kinase inhibitors with increased selectivity, use of second-line therapeutics to overcome primary resistance, and combination treatment to forestall resistance...
September 15, 2017: Annual Review of Pharmacology and Toxicology
https://www.readbyqxmd.com/read/28926760/laminin-%C3%AE-5-substrates-promote-survival-network-formation-and-functional-development-of-human-pluripotent-stem-cell-derived-neurons-in-vitro
#12
Anu Hyysalo, Mervi Ristola, Meeri E-L Mäkinen, Sergei Häyrynen, Matti Nykter, Susanna Narkilahti
Laminins are one of the major protein groups in the extracellular matrix (ECM) and specific laminin isoforms are crucial for neuronal functions in the central nervous system in vivo. In the present study, we compared recombinant human laminin isoforms (LN211, LN332, LN411, LN511, and LN521) and laminin isoform fragment (LN511-E8) in in vitro cultures of human pluripotent stem cell (hPSC)-derived neurons. We showed that laminin substrates containing the α5-chain are important for neuronal attachment, viability and network formation, as detected by phase contrast imaging, viability staining, and immunocytochemistry...
September 12, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28924347/the-mechanisms-of-graphene-based-materials-induced-programmed-cell-death-a-review-of-apoptosis-autophagy-and-programmed-necrosis
#13
REVIEW
Lingling Ou, Shaoqiang Lin, Bin Song, Jia Liu, Renfa Lai, Longquan Shao
Graphene-based materials (GBMs) are widely used in many fields, including biomedicine. To date, much attention had been paid to the potential unexpected toxic effects of GBMs. Here, we review the recent literature regarding the impact of GBMs on programmed cell death (PCD). Apoptosis, autophagy, and programmed necrosis are three major PCDs. Mechanistic studies demonstrated that the mitochondrial pathways and MAPKs (JNK, ERK, and p38)- and TGF-β-related signaling pathways are implicated in GBMs-induced apoptosis...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28915649/digoxin-induced-anemia-among-patients-with-atrial-fibrillation-and-heart-failure-clinical-data-analysis-and-drug-gene-interaction-network
#14
Yubi Lin, Siqi He, Ruiling Feng, Zhe Xu, Wanqun Chen, Zifeng Huang, Yang Liu, Qianhuan Zhang, Bin Zhang, Kejian Wang, Shulin Wu
Digoxin is widely used to treat various heart conditions. In order to clarify the association between digoxin and anemia adverse reaction, we inspected case reports submitted to the FDA Adverse Event Reporting System (FAERS) between January 2004 and December 2015. These reports involved 75618 atrial fibrillation patients and 15699 heart failure patients. Compared to other therapies, digoxin treatment was significantly more likely to be concurrent with anemia adverse reaction among both atrial fibrillation patients (pooled OR = 1...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28903495/rna-seq-of-human-neural-progenitor-cells-exposed-to-lead-pb-reveals-transcriptome-dynamics-splicing-alterations-and-disease-risk-associations
#15
Peng Jiang, Zhonggang Hou, Jennifer M Bolin, James A Thomson, Ron Stewart
Lead (Pb) is a well-known toxicant, especially for the developing nervous system, albeit the mechanism is largely unknown. In this study, we use time series RNA-seq to conduct a genome-wide survey of the transcriptome response of human embryonic stem cell-derived neural progenitor cells to lead treatment. Using a dynamic time warping algorithm coupled with statistical tests, we find that lead can either accelerate or decelerate the expression of specific genes during the time series. We further show that lead disrupts a neuron- and brain-specific splicing factor NOVA1 regulated splicing network...
September 1, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28903493/editor-s-highlight-formulation-and-toxicology-evaluation-of-the-intrathecal-ayx1-dna-decoy-in-sprague-dawley-rats
#16
Julien Mamet, David C Yeomans, Tony L Yaksh, Donald C Manning, Scott Harris
The longevity of pain after surgery is debilitating and limits the recovery of patients. AYX1 is a double-stranded, unprotected, 23 base-pair oligonucleotide designed to reduce acute post-surgical pain and prevent its chronification with a single intrathecal perioperative dose. AYX1 mimics the DNA sequence normally bound by EGR1 on chromosomes, a transcription factor transiently induced in the dorsal root ganglia-spinal cord network following a noxious input. AYX1 binds to EGR1 and prevents it from launching waves of gene regulation that are necessary to maintain pain over time...
September 1, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28903485/editor-s-highlight-mechanistic-toxicity-tests-based-on-an-adverse-outcome-pathway-network-for-hepatic-steatosis
#17
Michelle M Angrish, Charlene A McQueen, Elaine Cohen-Hubal, Maribel Bruno, Yue Ge, Brian N Chorley
Risk assessors use liver endpoints in rodent toxicology studies to assess the safety of chemical exposures. Yet, rodent endpoints may not accurately reflect human responses. For this reason and others, human-based invitro models are being developed and anchored to adverse outcome pathways to better predict adverse human health outcomes. Here, a networked adverse outcome pathway-guided selection of biology-based assays for lipid uptake, lipid efflux, fatty acid oxidation, and lipid accumulation were developed...
September 1, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28893249/assessment-of-the-potential-respiratory-hazard-of-volcanic-ash-from-future-icelandic-eruptions-a-study-of-archived-basaltic-to-rhyolitic-ash-samples
#18
David E Damby, Claire J Horwell, Gudrun Larsen, Thorvaldur Thordarson, Maura Tomatis, Bice Fubini, Ken Donaldson
BACKGROUND: The eruptions of Eyjafjallajökull (2010) and Grímsvötn (2011), Iceland, triggered immediate, international consideration of the respiratory health hazard of inhaling volcanic ash, and prompted the need to estimate the potential hazard posed by future eruptions of Iceland's volcanoes to Icelandic and Northern European populations. METHODS: A physicochemical characterization and toxicological assessment was conducted on a suite of archived ash samples spanning the spectrum of past eruptions (basaltic to rhyolitic magmatic composition) of Icelandic volcanoes following a protocol specifically designed by the International Volcanic Health Hazard Network...
September 11, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28889265/manganese-and-the-insulin-igf-signaling-network-in-huntington-s-disease-and-other-neurodegenerative-disorders
#19
Miles R Bryan, Aaron B Bowman
Huntington's disease (HD) is an autosomal dominant neurodegenerative disease resulting in motor impairment and death in patients. Recently, several studies have demonstrated insulin or insulin-like growth factor (IGF) treatment in models of HD, resulting in potent amelioration of HD phenotypes via modulation of the PI3K/AKT/mTOR pathways. Administration of IGF and insulin can rescue microtubule transport, metabolic function, and autophagy defects, resulting in clearance of Huntingtin (HTT) aggregates, restoration of mitochondrial function, amelioration of motor abnormalities, and enhanced survival...
2017: Advances in Neurobiology
https://www.readbyqxmd.com/read/28889247/guidelines-for-autopsy-investigation-of-sudden-cardiac-death-2017-update-from-the-association-for-european-cardiovascular-pathology
#20
Cristina Basso, Beatriz Aguilera, Jytte Banner, Stephan Cohle, Giulia d'Amati, Rosa Henriques de Gouveia, Cira di Gioia, Aurelie Fabre, Patrick J Gallagher, Ornella Leone, Joaquin Lucena, Lubov Mitrofanova, Pilar Molina, Sarah Parsons, Stefania Rizzo, Mary N Sheppard, Maria Paz Suárez Mier, S Kim Suvarna, Gaetano Thiene, Allard van der Wal, Aryan Vink, Katarzyna Michaud
Although sudden cardiac death (SCD) is one of the most important modes of death in Western countries, pathologists and public health physicians have not given this problem the attention it deserves. New methods of preventing potentially fatal arrhythmias have been developed and the accurate diagnosis of the causes of SCD is now of particular importance. Pathologists are responsible for determining the precise cause and mechanism of sudden death but there is still considerable variation in the way in which they approach this increasingly complex task...
September 9, 2017: Virchows Archiv: An International Journal of Pathology
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