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Particle and Fibre Toxicology

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https://www.readbyqxmd.com/read/29769147/association-of-pulmonary-cardiovascular-and-hematologic-metrics-with-carbon-nanotube-and-nanofiber-exposure-among-u-s-workers-a-cross-sectional-study
#1
Mary K Schubauer-Berigan, Matthew M Dahm, Aaron Erdely, John D Beard, M Eileen Birch, Douglas E Evans, Joseph E Fernback, Robert R Mercer, Stephen J Bertke, Tracy Eye, Marie A de Perio
BACKGROUND: Commercial use of carbon nanotubes and nanofibers (CNT/F) in composites and electronics is increasing; however, little is known about health effects among workers. We conducted a cross-sectional study among 108 workers at 12 U.S. CNT/F facilities. We evaluated chest symptoms or respiratory allergies since starting work with CNT/F, lung function, resting blood pressure (BP), resting heart rate (RHR), and complete blood count (CBC) components. METHODS: We conducted multi-day, full-shift sampling to measure background-corrected elemental carbon (EC) and CNT/F structure count concentrations, and collected induced sputum to measure CNT/F in the respiratory tract...
May 16, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29751765/lipophilic-components-of-diesel-exhaust-particles-induce-pro-inflammatory-responses-in-human-endothelial-cells-through-ahr-dependent-pathway-s
#2
Bendik C Brinchmann, Tonje Skuland, Mia H Rambøl, Krisztina Szoke, Jan E Brinchmann, Arno C Gutleb, Elisa Moschini, Alena Kubátová, Klara Kukowski, Eric Le Ferrec, Dominique Lagadic-Gossmann, Per E Schwarze, Marit Låg, Magne Refsnes, Johan Øvrevik, Jørn A Holme
BACKGROUND: Exposure to traffic-derived particulate matter (PM), such as diesel exhaust particles (DEP), is a leading environmental cause of cardiovascular disease (CVD), and may contribute to endothelial dysfunction and development of atherosclerosis. It is still debated how DEP and other inhaled PM can contribute to CVD. However, organic chemicals (OC) adhered to the particle surface, are considered central to many of the biological effects. In the present study, we have explored the ability of OC from DEP to reach the endothelium and trigger pro-inflammatory reactions, a central step on the path to atherosclerosis...
May 11, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29724254/radical-containing-combustion-derived-particulate-matter-enhance-pulmonary-th17-inflammation-via-the-aryl-hydrocarbon-receptor
#3
Sridhar Jaligama, Vivek S Patel, Pingli Wang, Asmaa Sallam, Jeffrey Harding, Matthew Kelley, Skylar R Mancuso, Tammy R Dugas, Stephania A Cormier
BACKGROUND: Pollutant particles containing environmentally persistent free radicals (EPFRs) are formed during many combustion processes (e.g. thermal remediation of hazardous wastes, diesel/gasoline combustion, wood smoke, cigarette smoke, etc.). Our previous studies demonstrated that acute exposure to EPFRs results in dendritic cell maturation and Th17-biased pulmonary immune responses. Further, in a mouse model of asthma, these responses were enhanced suggesting exposure to EPFRs as a risk factor for the development and/or exacerbation of asthma...
May 3, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29716632/multi-cellular-human-bronchial-models-exposed-to-diesel-exhaust-particles-assessment-of-inflammation-oxidative-stress-and-macrophage-polarization
#4
Jie Ji, Swapna Upadhyay, Xiaomiao Xiong, Maria Malmlöf, Thomas Sandström, Per Gerde, Lena Palmberg
BACKGROUND: Diesel exhaust particles (DEP) are a major component of outdoor air pollution. DEP mediated pulmonary effects are plausibly linked to inflammatory and oxidative stress response in which macrophages (MQ), epithelial cells and their cell-cell interaction plays a crucial role. Therefore, in this study we aimed at studying the cellular crosstalk between airway epithelial cells with MQ and MQ polarization following exposure to aerosolized DEP by assessing inflammation, oxidative stress, and MQ polarization response markers...
May 2, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29678176/prenatal-and-early-life-diesel-exhaust-exposure-causes-autism-like-behavioral-changes-in-mice
#5
Yu-Chi Chang, Toby B Cole, Lucio G Costa
BACKGROUND: Escalating prevalence of autism spectrum disorders (ASD) in recent decades has triggered increasing efforts in understanding roles played by environmental risk factors as a way to address this widespread public health concern. Several epidemiological studies show associations between developmental exposure to traffic-related air pollution and increased ASD risk. In rodent models, a limited number of studies have shown that developmental exposure to ambient ultrafine particulates or diesel exhaust (DE) can result in behavioral phenotypes consistent with mild ASD...
April 20, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29665823/exposure-to-concentrated-ambient-pm-2-5-alters-the-composition-of-gut-microbiota-in-a-murine-model
#6
Wanjun Wang, Ji Zhou, Minjie Chen, Xingke Huang, Xiaoyun Xie, Weihua Li, Qi Cao, Haidong Kan, Yanyi Xu, Zhekang Ying
BACKGROUND: Exposure to ambient fine particulate matter (PM2.5 ) correlates with abnormal glucose homeostasis, but the underlying biological mechanism has not been fully understood. The gut microbiota is an emerging crucial player in the homeostatic regulation of glucose metabolism. Few studies have investigated its role in the PM2.5 exposure-induced abnormalities in glucose homeostasis. METHODS: C57Bl/6J mice were exposed to filtered air (FA) or concentrated ambient PM2...
April 17, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29650039/carbon-black-suppresses-the-osteogenesis-of-mesenchymal-stem-cells-the-role-of-mitochondria
#7
Yulai Shen, Lu Wu, Dongdong Qin, Yankai Xia, Zhu Zhou, Xuemei Zhang, Xin Wu
BACKGROUND: The rapid increase in carbon black poses threats to human health. We evaluated the effect of CB (Printex 90) on the osteogenesis of bone-marrow-derived mesenchymal stem cells (MSCs). Mitochondria play an important role in the osteogenesis of MSCs and are potential targets of nanomaterials, so we studied the role of mitochondria in the CB Printex 90-induced effects on osteogenesis. RESULTS: Low doses of Printex 90 (3 ng/mL and 30 ng/mL) that did not cause deleterious effects on MSCs' viability significantly inhibited osteogenesis of MSCs...
April 12, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29642936/detection-of-titanium-particles-in-human-liver-and-spleen-and-possible-health-implications
#8
M B Heringa, R J B Peters, R L A W Bleys, M K van der Lee, P C Tromp, P C E van Kesteren, J C H van Eijkeren, A K Undas, A G Oomen, H Bouwmeester
BACKGROUND: Titanium dioxide (TiO2 ) is produced at high volumes and applied in many consumer and food products. Recent toxicokinetic modelling indicated the potential of TiO2 to accumulate in human liver and spleen upon daily oral exposure, which is not routinely investigated in chronic animal studies. A health risk from nanosized TiO2 particle consumption could not be excluded then. RESULTS: Here we show the first quantification of both total titanium (Ti) and TiO2 particles in 15 post-mortem human livers and spleens...
April 11, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29540230/carbon-load-in-airway-macrophages-as-a-biomarker-of-exposure-to-particulate-air-pollution-a-longitudinal-study-of-an-international-panel
#9
Yang Bai, Hannelore Bové, Tim S Nawrot, Benoit Nemery
BACKGROUND: Carbon load in airway macrophages (AM) has been proposed as an internal marker to assess long-term exposure to combustion-derived pollutant particles. However, it is not known how this biomarker is affected by changes in exposure. We studied the clearance kinetics of black carbon (BC) in AM, obtained by sputum induction, in a one-year panel study. METHODS: AM BC was measured 8 times with 6 weeks intervals in healthy young subjects: 15 long-term residents in Leuven, Belgium (BE, mean annual PM10 20-30 μg/m3 ) and 30 newcomers having arrived recently (< 3 weeks) in Leuven from highly polluted cities (mean annual PM10  > 50 μg/m3 ) in low and middle-income countries (LMIC, n = 15), or from low to moderately polluted cities in high-income countries (HIC, n = 15)...
March 14, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29540228/early-life-exposure-to-three-size-fractionated-ultrafine-and-fine-atmospheric-particulates-in-beijing-exacerbates-asthma-development-in-mature-mice
#10
Mei Mei, Haojun Song, Lina Chen, Bin Hu, Ru Bai, Diandou Xu, Ying Liu, Yuliang Zhao, Chunying Chen
BACKGROUND: Epidemiological studies have suggested that elevated levels of air pollution contribute to an increased incidence or severity of asthma. Although late-onset adult asthma seems to be more attributable to environmental risk factors, limited data is available on the impact of early-life exposure to size-fractionated ambient particulate matter (PM) on asthma in adults. We aimed to determine the effect on the development and exacerbation of asthma in the adult after the mice were exposed as juveniles to three size-fractionated ambient particulates collected from Beijing...
March 14, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29482579/vasomotor-function-in-rat-arteries-after-ex-vivo-and-intragastric-exposure-to-food-grade-titanium-dioxide-and-vegetable-carbon-particles
#11
Ditte Marie Jensen, Daniel Vest Christophersen, Majid Sheykhzade, Gry Freja Skovsted, Jens Lykkesfeldt, Rasmus Münter, Martin Roursgaard, Steffen Loft, Peter Møller
BACKGROUND: Humans are continuously exposed to particles in the gastrointestinal tract. Exposure may occur directly through ingestion of particles via food or indirectly by removal of inhaled material from the airways by the mucociliary clearance system. We examined the effects of food-grade particle exposure on vasomotor function and systemic oxidative stress in an ex vivo study and intragastrically exposed rats. METHODS: In an ex vivo study, aorta rings from naïve Sprague-Dawley rats were exposed for 30 min to food-grade TiO2 (E171), benchmark TiO2 (Aeroxide P25), food-grade vegetable carbon (E153) or benchmark carbon black (Printex 90)...
February 26, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29429408/concentration-dependent-systemic-response-after-inhalation-of-nano-sized-zinc-oxide-particles-in-human-volunteers
#12
Christian Monsé, Olaf Hagemeyer, Monika Raulf, Birger Jettkant, Vera van Kampen, Benjamin Kendzia, Vitali Gering, Günther Kappert, Tobias Weiss, Nadin Ulrich, Eike-Maximilian Marek, Jürgen Bünger, Thomas Brüning, Rolf Merget
BACKGROUND: Inhalation of high concentrations of zinc oxide particles (ZnO) may cause metal fume fever. In an earlier human inhalation study, no effects were observed after exposure to ZnO concentrations of 0.5 mg/m3 . Further data from experimental studies with pure ZnO in the concentration range between 0.5 and 2.5 mg/m3 are not available. It was the aim of this experimental study to establish the concentration-response relationship of pure nano-sized ZnO particles. METHODS: Sixteen healthy subjects were exposed to filtered air and ZnO particles (0...
February 12, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29429406/editorial-dose-dependent-zno-particle-induced-acute-phase-response-in-humans-warrants-re-evaluation-of-occupational-exposure-limits-for-metal-oxides
#13
EDITORIAL
Ulla Vogel, Flemming R Cassee
Epidemiological studies link inhalation of particles to increased risk of cardiovascular disease. Inhaled particles may induce cardiovascular disease by several different mechanisms including translocation of particles to systemic circulation, activation of airway sensory nerves resulting in autonomic imbalance and particle-induced pulmonary inflammation and acute phase response.The acute phase response is the systemic response to acute and chronic inflammatory states caused by for example bacterial infection, virus infection, trauma and infarction...
February 12, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29426343/differences-in-mwcnt-and-swcnt-induced-dna-methylation-alterations-in-association-with-the-nuclear-deposition
#14
Deniz Öner, Manosij Ghosh, Hannelore Bové, Matthieu Moisse, Bram Boeckx, Radu C Duca, Katrien Poels, Katrien Luyts, Eveline Putzeys, Kirsten Van Landuydt, Jeroen Aj Vanoirbeek, Marcel Ameloot, Diether Lambrechts, Lode Godderis, Peter Hm Hoet
BACKGROUND: Subtle DNA methylation alterations mediated by carbon nanotubes (CNTs) exposure might contribute to pathogenesis and disease susceptibility. It is known that both multi-walled carbon nanotubes (MWCNTs) and single-walled carbon nanotubes (SWCNTs) interact with nucleus. Such, nuclear-CNT interaction may affect the DNA methylation effects. In order to understand the epigenetic toxicity, in particular DNA methylation alterations, of SWCNTs and short MWCNTs, we performed global/genome-wide, gene-specific DNA methylation and RNA-expression analyses after exposing human bronchial epithelial cells (16HBE14o- cell line)...
February 9, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29386028/pulmonary-exposure-to-carbonaceous-nanomaterials-and-sperm-quality
#15
Astrid Skovmand, Anna Jacobsen Lauvås, Preben Christensen, Ulla Vogel, Karin Sørig Hougaard, Sandra Goericke-Pesch
BACKGROUND: Semen quality parameters are potentially affected by nanomaterials in several ways: Inhaled nanosized particles are potent inducers of pulmonary inflammation, leading to the release of inflammatory mediators. Small amounts of particles may translocate from the lungs into the lung capillaries, enter the systemic circulation and ultimately reach the testes. Both the inflammatory response and the particles may induce oxidative stress which can directly affect spermatogenesis...
January 31, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29382351/the-crystal-structure-of-titanium-dioxide-nanoparticles-influences-immune-activity-in-vitro-and-in-vivo
#16
Rob J Vandebriel, Jolanda P Vermeulen, Laurens B van Engelen, Britt de Jong, Lisa M Verhagen, Liset J de la Fonteyne-Blankestijn, Marieke E Hoonakker, Wim H de Jong
BACKGROUND: The use of engineered nanoparticles (NP) is widespread and still increasing. There is a great need to assess their safety. Newly engineered NP enter the market in a large variety; therefore safety evaluation should preferably be in a high-throughput fashion. In vitro screening is suitable for this purpose. TiO 2 NP exist in a large variety (crystal structure, coating and size), but information on their relative toxicities is scarce. TiO 2 NP may be inhaled by workers in e...
January 30, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29368623/isd3-a-particokinetic-model-for-predicting-the-combined-effects-of-particle-sedimentation-diffusion-and-dissolution-on-cellular-dosimetry-for-in-vitro-systems
#17
Dennis G Thomas, Jordan N Smith, Brian D Thrall, Donald R Baer, Hadley Jolley, Prabhakaran Munusamy, Vamsi Kodali, Philip Demokritou, Joel Cohen, Justin G Teeguarden
BACKGROUND: The development of particokinetic models describing the delivery of insoluble or poorly soluble nanoparticles to cells in liquid cell culture systems has improved the basis for dose-response analysis, hazard ranking from high-throughput systems, and now allows for translation of exposures across in vitro and in vivo test systems. Complimentary particokinetic models that address processes controlling delivery of both particles and released ions to cells, and the influence of particle size changes from dissolution on particle delivery for cell-culture systems would help advance our understanding of the role of particles and ion dosimetry on cellular toxicology...
January 25, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29343276/the-antihyperlipidemic-effects-of-fullerenol-nanoparticles-via-adjusting-the-gut-microbiota-in-vivo
#18
Juan Li, Runhong Lei, Xin Li, Fengxia Xiong, Quanyang Zhang, Yue Zhou, Shengmei Yang, Yanan Chang, Kui Chen, Weihong Gu, Chongming Wu, Gengmei Xing
BACKGROUND: Nanoparticles (NPs) administered orally will meet the gut microbiota, but their impacts on microbiota homeostasis and the consequent physiological relevance remain largely unknown. Here, we describe the modulatory effects and the consequent pharmacological outputs of two orally administered fullerenols NPs (Fol1 C60(OH)7(O)8 and Fol113 C60(OH)11(O)6) on gut microbiota. RESULTS: Administration of Fol1 and Fol113 NPs for 4 weeks largely shifted the overall structure of gut microbiota in mice...
January 17, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29329563/pm-2-5-induced-oxidative-stress-increases-intercellular-adhesion-molecule-1-expression-in-lung-epithelial-cells-through-the-il-6-akt-stat3-nf-%C3%AE%C2%BAb-dependent-pathway
#19
Chen-Wei Liu, Tzu-Lin Lee, Yu-Chen Chen, Chan-Jung Liang, Shu-Huei Wang, June-Horng Lue, Jaw-Shiun Tsai, Shih-Wei Lee, Shun-Hua Chen, Yi-Fan Yang, Tzu-Yi Chuang, Yuh-Lien Chen
BACKGROUND: Epidemiological studies have shown that ambient air pollution is closely associated with increased respiratory inflammation and decreased lung function. Particulate matters (PMs) are major components of air pollution that damages lung cells. However, the mechanisms remain to be elucidated. This study examines the effects of PMs on intercellular adhesion molecule-1 (ICAM-1) expression and the related mechanisms in vitro and in vivo. RESULT: The cytotoxicity, reactive oxygen species (ROS) generation, and monocyte adherence to A549 cells were more severely affected by treatment with O-PMs (organic solvent-extractable fraction of SRM1649b) than with W-PMs (water-soluble fraction of SRM1649b)...
January 12, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29321036/maternal-engineered-nanomaterial-inhalation-during-gestation-alters-the-fetal-transcriptome
#20
P A Stapleton, Q A Hathaway, C E Nichols, A B Abukabda, M V Pinti, D L Shepherd, C R McBride, J Yi, V C Castranova, J M Hollander, T R Nurkiewicz
BACKGROUND: The integration of engineered nanomaterials (ENM) is well-established and widespread in clinical, commercial, and domestic applications. Cardiovascular dysfunctions have been reported in adult populations after exposure to a variety of ENM. As the diversity of these exposures continues to increase, the fetal ramifications of maternal exposures have yet to be determined. We, and others, have explored the consequences of ENM inhalation during gestation and identified many cardiovascular and metabolic outcomes in the F1 generation...
January 10, 2018: Particle and Fibre Toxicology
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