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Particle and Fibre Toxicology

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https://www.readbyqxmd.com/read/28923112/cobalt-nanoparticles-induce-lung-injury-dna-damage-and-mutations-in-mice
#1
Rong Wan, Yiqun Mo, Zhenyu Zhang, Mizu Jiang, Shichuan Tang, Qunwei Zhang
BACKGROUND: We and other groups have demonstrated that exposure to cobalt nanoparticles (Nano-Co) caused oxidative stress and inflammation, which have been shown to be strongly associated with genotoxic and carcinogenic effects. However, few studies have reported Nano-Co-induced genotoxic effects in vivo. Here, we propose that Nano-Co may have high genotoxic effects due to their small size and high surface area, which have high capacity for causing oxidative stress and inflammation. METHODS: gpt delta transgenic mice were used as our in vivo study model...
September 18, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28903780/stat-6-signaling-pathway-and-not-interleukin-1-mediates-multi-walled-carbon-nanotube-induced-lung-fibrosis-in-mice-insights-from-an-adverse-outcome-pathway-framework
#2
Jake Nikota, Allyson Banville, Laura Rose Goodwin, Dongmei Wu, Andrew Williams, Carole Lynn Yauk, Håkan Wallin, Ulla Vogel, Sabina Halappanavar
BACKGROUND: The accumulation of MWCNTs in the lung environment leads to inflammation and the development of disease similar to pulmonary fibrosis in rodents. Adverse Outcome Pathways (AOPs) are a framework for defining and organizing the key events that comprise the biological changes leading to undesirable events. A putative AOP has been developed describing MWCNT-induced pulmonary fibrosis; inflammation and the subsequent healing response induced by inflammatory mechanisms have been implicated in disease progression...
September 13, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28893276/imipramine-blocks-acute-silicosis-in-a-mouse-model
#3
Rupa Biswas, Kevin L Trout, Forrest Jessop, Jack R Harkema, Andrij Holian
BACKGROUND: Inhalation of crystalline silica is associated with pulmonary inflammation and silicosis. Although silicosis remains a prevalent health problem throughout the world, effective treatment choices are limited. Imipramine (IMP) is a FDA approved tricyclic antidepressant drug with lysosomotropic characteristics. The aim of this study was to evaluate the potential for IMP to reduce silicosis and block phagolysosome membrane permeabilization. METHODS: C57BL/6 alveolar macrophages (AM) exposed to crystalline silica ± IMP in vitro were assessed for IL-1β release, cytotoxicity, particle uptake, lysosomal stability, and acid sphingomyelinase activity...
September 11, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28854940/diesel-engine-exhaust-accelerates-plaque-formation-in-a-mouse-model-of-alzheimer-s-disease
#4
Maja Hullmann, Catrin Albrecht, Damiën van Berlo, Miriam E Gerlofs-Nijland, Tina Wahle, Agnes W Boots, Jean Krutmann, Flemming R Cassee, Thomas A Bayer, Roel P F Schins
BACKGROUND: Increasing evidence from toxicological and epidemiological studies indicates that the central nervous system is an important target for ambient air pollutants. We have investigated whether long-term inhalation exposure to diesel engine exhaust (DEE), a dominant contributor to particulate air pollution in urban environments, can aggravate Alzheimer's Disease (AD)-like effects in female 5X Familial AD (5XFAD) mice and their wild-type female littermates. Following 3 and 13 weeks exposures to diluted DEE (0...
August 30, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28851397/nf-%C3%AE%C2%BAb-regulated-microrna-574-5p-underlies-synaptic-and-cognitive-impairment-in-response-to-atmospheric-pm2-5-aspiration
#5
Tingting Ku, Ben Li, Rui Gao, Yingying Zhang, Wei Yan, Xiaotong Ji, Guangke Li, Nan Sang
BACKGROUND: PM2.5 (particulate matter ≤ 2.5 μm) is one of the leading environmental risk factors for the global burden of disease. Whereas increasing evidence has linked the adverse roles of PM2.5 with cardiovascular and respiratory diseases, limited but growing emerging evidence suggests that PM2.5 exposure can affect the nervous system, causing neuroinflammation, synaptic dysfunction and cognitive deterioration. However, the molecular mechanisms underlying the synaptic and cognitive deficits elicited by PM2...
August 29, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28851387/erratum-to-reduction-of-pulmonary-toxicity-of-metal-oxide-nanoparticles-by-phosphonate-based-surface-passivation
#6
Xiaoming Cai, Anson Lee, Zhaoxia Ji, Cynthia Huang, Chong Hyun Chang, Xiang Wang, Yu-Pei Liao, Tian Xia, Ruibin Li
No abstract text is available yet for this article.
August 29, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28899404/extracellular-vesicle-packaged-mirna-release-after-short-term-exposure-to-particulate-matter-is-associated-with-increased-coagulation
#7
Laura Pergoli, Laura Cantone, Chiara Favero, Laura Angelici, Simona Iodice, Eva Pinatel, Mirjam Hoxha, Laura Dioni, Marilena Letizia, Benedetta Albetti, Letizia Tarantini, Federica Rota, Pier Alberto Bertazzi, Amedea Silvia Tirelli, Vincenza Dolo, Andrea Cattaneo, Luisella Vigna, Cristina Battaglia, Michele Carugno, Matteo Bonzini, Angela Cecilia Pesatori, Valentina Bollati
BACKGROUND: Exposure to particulate matter (PM) is associated with increased incidence of cardiovascular disease and increased coagulation, but the molecular mechanisms underlying these associations remain unknown. Obesity may increase susceptibility to the adverse effects of PM exposure, exacerbating the effects on cardiovascular diseases. Extracellular vesicles (EVs), which travel in body fluids and transfer microRNAs (miRNAs) between tissues, might play an important role in PM-induced cardiovascular risk...
August 24, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28835236/impact-of-copper-oxide-nanomaterials-on-differentiated-and-undifferentiated-caco-2-intestinal-epithelial-cells-assessment-of-cytotoxicity-barrier-integrity-cytokine-production-and-nanomaterial-penetration
#8
Victor C Ude, David M Brown, Luca Viale, Nilesh Kanase, Vicki Stone, Helinor J Johnston
BACKGROUND: Copper oxide nanomaterials (CuO NMs) are exploited in a diverse array of products including antimicrobials, inks, cosmetics, textiles and food contact materials. There is therefore a need to assess the toxicity of CuO NMs to the gastrointestinal (GI) tract since exposure could occur via direct oral ingestion, mucocillary clearance (following inhalation) or hand to mouth contact. METHODS: Undifferentiated Caco-2 intestinal cells were exposed to CuO NMs (10 nm) at concentrations ranging from 0...
August 23, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28830530/prenatal-tobacco-smoke-exposure-predisposes-offspring-mice-to-exacerbated-allergic-airway-inflammation-associated-with-altered-innate-effector-function
#9
Maria Ferrini, Sophia Carvalho, Yoon Hee Cho, Britten Postma, Lucas Miranda Marques, Kent Pinkerton, Kevan Roberts, Zeina Jaffar
BACKGROUND: Epidemiological studies suggest that prenatal and early life environmental exposures have adverse effects on pulmonary function and are important contributors in the development of childhood asthma and allergic disease. The mechanism by which environmental tobacco smoke (ETS) exposure in utero promotes the development of allergic asthma remains unclear. In this study, we investigated the immunological consequences of prenatal exposure to ETS in order to understand events responsible for the development or exacerbation of allergic asthma...
August 22, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28784145/composition-respirable-fraction-and-dissolution-rate-of-24-stone-wool-mmvf-with-their-binder
#10
Wendel Wohlleben, Hubert Waindok, Björn Daumann, Kai Werle, Melanie Drum, Heiko Egenolf
BACKGROUND: Man-made vitreous fibres (MMVF) are produced on a large scale for thermal insulation purposes. After extensive studies of fibre effects in the 1980ies and 1990ies, the composition of MMVF was modified to reduce the fibrotic and cancerogenic potential via reduced biopersistence. However, occupational risks by handling, applying, disposing modern MMVF may be underestimated as the conventional regulatory classification -combining composition, in-vivo clearance and effects- seems to be based entirely on MMVF after removal of the binder...
August 7, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28764715/comparison-between-micro-and-nanosized-copper-oxide-and-water-soluble-copper-chloride-interrelationship-between-intracellular-copper-concentrations-oxidative-stress-and-dna-damage-response-in-human-lung-cells
#11
Bettina Maria Strauch, Rebecca Katharina Niemand, Nicola Lisa Winkelbeiner, Andrea Hartwig
BACKGROUND: Nano- and microscale copper oxide particles (CuO NP, CuO MP) are applied for manifold purposes, enhancing exposure and thus the potential risk of adverse health effects. Based on the pronounced in vitro cytotoxicity of CuO NP, systematic investigations on the mode of action are required. Therefore, the impact of CuO NP, CuO MP and CuCl2 on the DNA damage response on transcriptional level was investigated by quantitative gene expression profiling via high-throughput RT-qPCR...
August 1, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28728598/multi-walled-carbon-nanotubes-induced-alterations-in-microrna-let-7-and-its-targets-activate-a-protection-mechanism-by-conferring-a-developmental-timing-control
#12
Li Zhao, Hanxiao Wan, Qizhan Liu, Dayong Wang
No abstract text is available yet for this article.
July 20, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28716119/stat1-dependent-and-independent-pulmonary-allergic-and-fibrogenic-responses-in-mice-after-exposure-to-tangled-versus-rod-like-multi-walled-carbon-nanotubes
#13
Katherine S Duke, Alexia J Taylor-Just, Mark D Ihrie, Kelly A Shipkowski, Elizabeth A Thompson, Erinn C Dandley, Gregory N Parsons, James C Bonner
BACKGROUND: Pulmonary toxicity of multi-walled carbon nanotubes (MWCNTs) is influenced by physicochemical characteristics and genetic susceptibility. We hypothesized that contrasting rigidities of tangled (t) versus rod-like (r) MWCNTs would result in differing immunologic or fibrogenic responses in mice and that these responses would be exaggerated in transgenic mice lacking the signal transducer and activator of transcription-1 (STAT1), a susceptible mouse model of pulmonary fibrosis...
July 17, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28716104/evaluating-the-potential-of-gold-silver-and-silica-nanoparticles-to-saturate-mononuclear-phagocytic-system-tissues-under-repeat-dosing-conditions
#14
James L Weaver, Grainne A Tobin, Taylor Ingle, Simona Bancos, David Stevens, Rodney Rouse, Kristina E Howard, David Goodwin, Alan Knapton, Xiaohong Li, Katherine Shea, Sharron Stewart, Lin Xu, Peter L Goering, Qin Zhang, Paul C Howard, Jessie Collins, Saeed Khan, Kidon Sung, Katherine M Tyner
BACKGROUND: As nanoparticles (NPs) become more prevalent in the pharmaceutical industry, questions have arisen from both industry and regulatory stakeholders about the long term effects of these materials. This study was designed to evaluate whether gold (10 nm), silver (50 nm), or silica (10 nm) nanoparticles administered intravenously to mice for up to 8 weeks at doses known to be sub-toxic (non-toxic at single acute or repeat dosing levels) and clinically relevant could produce significant bioaccumulation in liver and spleen macrophages...
July 17, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28701167/a-combined-experimental-and-numerical-study-on-upper-airway-dosimetry-of-inhaled-nanoparticles-from-an-electrical-discharge-machine-shop
#15
Lin Tian, Yidan Shang, Rui Chen, Ru Bai, Chunying Chen, Kiao Inthavong, Jiyuan Tu
BACKGROUNDS: Exposure to nanoparticles in the workplace is a health concern to occupational workers with increased risk of developing respiratory, cardiovascular, and neurological disorders. Based on animal inhalation study and human lung tumor risk extrapolation, current authoritative recommendations on exposure limits are either on total mass or number concentrations. Effects of particle size distribution and the implication to regional airway dosages are not elaborated. METHODS: Real time production of particle concentration and size distribution in the range from 5...
July 12, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28701164/effects-from-a-90-day-inhalation-toxicity-study-with-cerium-oxide-and-barium-sulfate-nanoparticles-in-rats
#16
Daniela Schwotzer, Heinrich Ernst, Dirk Schaudien, Heiko Kock, Gerhard Pohlmann, Clemens Dasenbrock, Otto Creutzenberg
BACKGROUND: Nanomaterials like cerium oxide and barium sulfate are frequently processed in industrial and consumer products and exposure of humans and other organisms is likely. Generally less information is given on health effects and toxicity, especially regarding long-term exposure to low nanoparticle doses. Since inhalation is still the major route of uptake the present study focused on pulmonary effects of CeO2NM-212 (0.1, 0.3, 1.0, 3.0 mg/m(3)) and BaSO4NM-220 nanoparticles (50...
July 12, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28646905/mechanistic-understanding-of-nanoparticles-interactions-with-extracellular-matrix-the-cell-and-immune-system
#17
REVIEW
Ayse Basak Engin, Dragana Nikitovic, Monica Neagu, Petra Henrich-Noack, Anca Oana Docea, Mikhail I Shtilman, Kirill Golokhvast, Aristidis M Tsatsakis
Extracellular matrix (ECM) is an extraordinarily complex and unique meshwork composed of structural proteins and glycosaminoglycans. The ECM provides essential physical scaffolding for the cellular constituents, as well as contributes to crucial biochemical signaling. Importantly, ECM is an indispensable part of all biological barriers and substantially modulates the interchange of the nanotechnology products through these barriers. The interactions of the ECM with nanoparticles (NPs) depend on the morphological characteristics of intercellular matrix and on the physical characteristics of the NPs and may be either deleterious or beneficial...
June 24, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28645299/programming-of-mouse-obesity-by-maternal-exposure-to-concentrated-ambient-fine-particles
#18
Minjie Chen, Xiaoke Wang, Ziying Hu, Huifen Zhou, Yanyi Xu, Lianglin Qiu, Xiaobo Qin, Yuhao Zhang, Zhekang Ying
BACKGROUND: Many diseases including obesity may originate through alterations in the early-life environment that interrupts fetal development. Increasing evidence has shown that exposure to ambient fine particles (PM2.5) is associated with abnormal fetal development. However, its long-term metabolic effects on offspring have not been systematically investigated. RESULTS: To determine if maternal exposure to PM2.5 programs offspring obesity, female C57Bl/6j mice were exposed to filtered air (FA) or concentrated ambient PM2...
June 23, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28645296/myd88-dependent-pro-interleukin-1%C3%AE-induction-in-dendritic-cells-exposed-to-food-grade-synthetic-amorphous-silica
#19
Hans Christian Winkler, Julian Kornprobst, Peter Wick, Lea Maria von Moos, Ioannis Trantakis, Elisabeth Maria Schraner, Barbara Bathke, Hubertus Hochrein, Mark Suter, Hanspeter Naegeli
BACKGROUND: Dendritic cells (DCs) are specialized first-line sensors of foreign materials invading the organism. These sentinel cells rely on pattern recognition receptors such as Nod-like or Toll-like receptors (TLRs) to launch immune reactions against pathogens, but also to mediate tolerance to self-antigens and, in the intestinal milieu, to nutrients and commensals. Since inappropriate DC activation contributes to inflammatory diseases and immunopathologies, a key question in the evaluation of orally ingested nanomaterials is whether their contact with DCs in the intestinal mucosa disrupts this delicate homeostatic balance between pathogen defense and tolerance...
June 23, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28637465/early-pulmonary-response-is-critical-for-extra-pulmonary-carbon-nanoparticle-mediated-effects-comparison-of-inhalation-versus-intra-arterial-infusion-exposures-in-mice
#20
Koustav Ganguly, Dariusch Ettehadieh, Swapna Upadhyay, Shinji Takenaka, Thure Adler, Erwin Karg, Fritz Krombach, Wolfgang G Kreyling, Holger Schulz, Otmar Schmid, Tobias Stoeger
BACKGROUND: The death toll associated with inhaled ambient particulate matter (PM) is attributed mainly to cardio-vascular rather than pulmonary effects. However, it is unclear whether the key event for cardiovascular impairment is particle translocation from lung to circulation (direct effect) or indirect effects due to pulmonary particle-cell interactions. In this work, we addressed this issue by exposing healthy mice via inhalation and intra-arterial infusion (IAI) to carbon nanoparticles (CNP) as surrogate for soot, a major constituent of (ultrafine) urban PM...
June 20, 2017: Particle and Fibre Toxicology
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