journal
MENU ▼
Read by QxMD icon Read
search

Nanotoxicology

journal
https://www.readbyqxmd.com/read/28513319/effect-of-surface-functionalizations-of-multi-walled-carbon-nanotubes-on-neoplastic-transformation-potential-in-primary-human-lung-epithelial-cells
#1
Todd A Stueckle, Donna C Davidson, Ray Derk, Peng Wang, Sherri Friend, Diane Schwegler-Berry, Peng Zheng, Nianqiang Wu, Vince Castranova, Yon Rojanasakul, Liying Wang
Functionalized multi-walled carbon nanotube (fMWCNT) development has intensified to improve their surface activity for numerous applications, and potentially reduce toxic effects. Although MWCNT exposures are associated with lung tumorigenesis in vivo, adverse responses associated with exposure to different fMWCNTs in human lung epithelium are presently unknown. This study hypothesized that different plasma coating functional groups determine MWCNT neoplastic transformation potential. Using our established model, human primary small airway epithelial cells (pSAECs) were continuously exposed for 8 and 12 weeks at 0...
May 17, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28503974/biokinetics-of-engineered-nano-tio2-in-rats-administered-by-different-exposure-routes-implications-for-human-health
#2
Dhimiter Bello, David B Warheit
No abstract text is available yet for this article.
May 15, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28494628/probabilistic-risk-assessment-of-emerging-materials-case-study-of-titanium-dioxide-nanoparticles
#3
Michael P Tsang, Danail Hristozov, Alex Zabeo, Antti Joonas Koivisto, Alexander Christian Østerskov Jensen, Keld Alstrup Jensen, Chengfang Pang, Antonio Marcomini, Guido Sonnemann
The development and use of emerging technologies such as nanomaterials can provide both benefits and risks to society. Emerging materials may promise to bring many technological advantages but may not be well-characterized in terms of their production volumes, magnitude of emissions, behavior in the environment and effects on living organisms. This uncertainty can present challenges to scientists developing these materials and persons responsible for defining and measuring their adverse impacts. Human health risk assessment is a method of identifying the intrinsic hazard of and quantifying the dose-response relationship and exposure to a chemical, to finally determine the estimation of risk...
May 12, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28490217/antimicrobial-proteins-in-the-response-to-graphene-oxide-in-caenorhabditis-elegans
#4
Mingxia Ren, Li Zhao, Xiao Lv, Dayong Wang
Upon exposure to environmental engineered nanomaterials (ENMs), animals will activate certain response signals to protect themselves from the toxic effects. However, the underlying molecular mechanisms for this response are still largely unclear. Using in vivo assay system of Caenorhabditis elegans, we here found that antimicrobial proteins of LYS-1, LYS-8, SPP-1, DOD-6, and F55G11.4 were activated by graphene oxide (GO) exposure. These antimicrobial proteins functioned as molecular targets of transcriptional factor DAF-16 in insulin signaling pathway, and acted in intestine to regulate the response to GO...
May 10, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28490213/are-fluorescence-based-chlorophyll-quantification-methods-suitable-for-algae-toxicity-assessment-of-carbon-nanomaterials
#5
Julia Farkas, Andy M Booth
Using a multi-walled carbon nanotube (MWCNT) and graphene oxide (GO) as representative test materials, we evaluated the applicability of in vivo and in vitro chlorophyll-a (Chl-a) fluorescence quantification methods, which are used in standard algae ecotoxicity tests such as OECD 201 and ISO 8692. In vivo quantification of Chl-a from Raphidocelis subcapitata indicated a significant reduction in Chl-a fluorescence in the presence of MWCNTs due to shading, but a significant autofluorescence from GO that caused an overestimation of Chl-a concentration...
May 10, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28463032/assessing-nanomaterial-exposures-in-aquatic-ecotoxicological-testing-framework-and-case-studies-based-on-dispersion-and-dissolution
#6
Alan J Kennedy, Jessica G Coleman, Stephen A Diamond, Nicolas L Melby, Anthony J Bednar, Ashley Harmon, Zachary A Collier, Robert Moser
The unique behavior of engineered nanomaterials (ENM) in aqueous media and dynamic changes in particle settling, agglomeration and dissolution rates is a challenge to the consistency, reliability and interpretation of standard aquatic hazard bioassay results. While the toxicological endpoints (e.g., survival, growth, reproduction, etc.) in ecotoxicity bioassays are largely applicable to ENMs, the standard methods as written for dissolved substances are confounded by the dynamic settling, agglomeration and dissolution of particulate ENMs during the bioassay...
May 2, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28368214/iron-phosphate-nanoparticles-for-food-fortification-biological-effects-in-rats-and-human-cell-lines
#7
Lea M von Moos, Mirjam Schneider, Florentine M Hilty, Monika Hilbe, Myrtha Arnold, Nathalie Ziegler, Diogo Sales Mato, Hans Winkler, Mohamed Tarik, Christian Ludwig, Hanspeter Naegeli, Wolfgang Langhans, Michael B Zimmermann, Shana J Sturla, Ioannis A Trantakis
Nanotechnology offers new opportunities for providing health benefits in foods. Food fortification with iron phosphate nanoparticles (FePO4 NPs) is a promising new approach to reducing iron deficiency because FePO4 NPs combine high bioavailability with superior sensory performance in difficult to fortify foods. However, their safety remains largely untested. We fed rats for 90 days diets containing FePO4 NPs at doses at which iron sulfate (FeSO4), a commonly used food fortificant, has been shown to induce adverse effects...
April 20, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28420299/surface-chemistry-of-gold-nanoparticles-determines-the-biocorona-composition-impacting-cellular-uptake-toxicity-and-gene-expression-profiles-in-human-endothelial-cells
#8
Parwathy Chandran, Jim E Riviere, Nancy A Monteiro-Riviere
This study investigated the role of nanoparticle size and surface chemistry on biocorona composition and its effect on uptake, toxicity and cellular responses in human umbilical vein endothelial cells (HUVEC), employing 40 and 80 nm gold nanoparticles (AuNP) with branched polyethyleneimine (BPEI), lipoic acid (LA) and polyethylene glycol (PEG) coatings. Proteomic analysis identified 59 hard corona proteins among the various AuNP, revealing largely surface chemistry-dependent signature adsorbomes exhibiting human serum albumin (HSA) abundance...
April 19, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28415888/bioengineered-gold-nanoparticles-targeted-to-mesenchymal-cells-from-patients-with-bronchiolitis-obliterans-syndrome-does-not-rise-the-inflammatory-response-and-can-be-safely-inhaled-by-rodents
#9
Emanuela Cova, Simona Inghilleri, Laura Pandolfi, Monica Morosini, Sara Magni, Miriam Colombo, Davide Piloni, Chiara Finetti, Gabriele Ceccarelli, Laura Benedetti, Maria Gabriella Cusella, Manuela Agozzino, Fabio Corsi, Raffaele Allevi, Simona Mrakic-Sposta, Sarah Moretti, Simona De Gregori, Davide Prosperi, Federica Meloni
The use of gold nanoparticles as drug delivery system represents a promising issue for diseases without effective pharmacological treatment due to insufficient local drug accumulation and excessive systemic toxicity. Bronchiolitis obliterans syndrome (BOS) represents about 70% of cases of chronic lung allograft dysfunction, the main challenge to long term lung transplantation. It is believed that due to repeated insults to epithelial bronchiolar cells local inflammatory response creates a milieu that favours epithelial mesenchymal transition and activation of local mesenchymal cells leading to airway fibro-obliteration...
April 18, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28358292/pulmonary-exposure-to-metallic-nanomaterials-during-pregnancy-irreversibly-impairs-lung-development-of-the-offspring
#10
Emmanuel Paul, Marie-Laure Franco-Montoya, Erwan Paineau, Bernard Angeletti, Shamila Vibhushan, Audrey Ridoux, Arnaud Tiendrebeogo, Murielle Salome, Bernhard Hesse, Delphine Vantelon, Jérôme Rose, Florence Canouï-Poitrine, Jorge Boczkowski, Sophie Lanone, Christophe Delacourt, Jean-Claude Pairon
Due to the growing commercial applications of manufactured nanoparticles (NPs), toxicological studies on NPs, especially during the critical window of development, are of major importance. The aim of the study was to assess the impact of respiratory exposure to metallic and metal oxide NPs during pregnancy on lung development of the offspring and to determine the key parameters involved in lung alterations. Pregnant mice were exposed to weekly doses of 100 μg (total dose 300 μg) of titanium dioxide (TiO2), cerium oxide (CeO2), silver (Ag) NPs or saline solution by nonsurgical intratracheal instillation...
April 17, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28368775/neuronal-erk-signaling-in-response-to-graphene-oxide-in-nematode-caenorhabditis-elegans
#11
Man Qu, Yunhui Li, Qiuli Wu, Yankai Xia, Dayong Wang
ERK signaling is one of the important mitogen activated protein kinases (MAPKs). However, the role of ERK signaling in the regulation of response to engineered nanomaterial exposure is still largely unclear. In this study, using in vivo assay system of Caenorhabditis elegans, we investigated the function of ERK signaling in response to graphene oxide (GO) exposure and the underlying molecular mechanism. GO exposure increased the expression of MEK-2/MEK and MPK-1/ERK in the ERK signaling pathway. Mutation of mek-2 or mpk-1 resulted in a susceptibility to GO toxicity...
April 3, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28301273/a-cross-sectional-study-of-changes-in-markers-of-immunological-effects-and-lung-health-due-to-exposure-to-multi-walled-carbon-nanotubes
#12
Jelle Vlaanderen, Anjoeka Pronk, Nathaniel Rothman, Allan Hildesheim, Debra Silverman, H Dean Hosgood, Suzanne Spaan, Eelco Kuijpers, Lode Godderis, Peter Hoet, Qing Lan, Roel Vermeulen
BACKGROUND: Multi-wall carbon nanotubes (MWCNTs) are manufactured nanomaterials to which workers and the general population will be increasingly exposed in coming years. Little is known about potential human health effects of exposure to MWCNTs, but effects on the lung and the immune system have been reported in animal and mechanistic studies. OBJECTIVES: We conducted a cross-sectional study to assess the association between occupational exposure to MWCNTs and effects on lung health and the immune system...
April 3, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28290735/quantitative-biokinetics-of-titanium-dioxide-nanoparticles-after-intratracheal-instillation-in-rats-part-3
#13
Wolfgang G Kreyling, Uwe Holzwarth, Nadine Haberl, Ján Kozempel, Alexander Wenk, Stephanie Hirn, Carsten Schleh, Martin Schäffler, Jens Lipka, Manuela Semmler-Behnke, Neil Gibson
The biokinetics of a size-selected fraction (70 nm median size) of commercially available and (48)V-radiolabeled [(48)V]TiO2 nanoparticles has been investigated in healthy adult female Wistar-Kyoto rats at retention time-points of 1 h, 4 h, 24 h, 7 d and 28 d after intratracheal instillation of a single dose of an aqueous [(48)V]TiO2-nanoparticle suspension. A completely balanced quantitative biodistribution in all organs and tissues was obtained by applying typical [(48)V]TiO2-nanoparticle doses in the range of 40-240 μg·kg(-1) bodyweight and making use of the high sensitivity of the radiotracer technique...
April 3, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28290734/quantitative-biokinetics-of-titanium-dioxide-nanoparticles-after-oral-application-in-rats-part-2
#14
Wolfgang G Kreyling, Uwe Holzwarth, Carsten Schleh, Ján Kozempel, Alexander Wenk, Nadine Haberl, Stephanie Hirn, Martin Schäffler, Jens Lipka, Manuela Semmler-Behnke, Neil Gibson
The biokinetics of a size-selected fraction (70 nm median size) of commercially available and (48)V-radiolabeled [(48)V]TiO2 nanoparticles has been investigated in female Wistar-Kyoto rats at retention timepoints 1 h, 4 h, 24 h and 7 days after oral application of a single dose of an aqueous [(48)V]TiO2-nanoparticle suspension by intra-esophageal instillation. A completely balanced quantitative body clearance and biokinetics in all organs and tissues was obtained by applying typical [(48)V]TiO2-nanoparticle doses in the range of 30-80 μg•kg(-1) bodyweight, making use of the high sensitivity of the radiotracer technique...
April 3, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28290717/quantitative-biokinetics-of-titanium-dioxide-nanoparticles-after-intravenous-injection-in-rats-part-1
#15
Wolfgang G Kreyling, Uwe Holzwarth, Nadine Haberl, Ján Kozempel, Stephanie Hirn, Alexander Wenk, Carsten Schleh, Martin Schäffler, Jens Lipka, Manuela Semmler-Behnke, Neil Gibson
Submicrometer TiO2 particles, including nanoparticulate fractions, are used in an increasing variety of consumer products, as food additives and also drug delivery applications are envisaged. Beyond exposure of occupational groups, this entails an exposure risk to the public. However, nanoparticle translocation from the organ of intake and potential accumulation in secondary organs are poorly understood and in many investigations excessive doses are applied. The present study investigates the biokinetics and clearance of a low single dose (typically 40-400 μg/kg BW) of (48)V-radiolabeled, pure TiO2 anatase nanoparticles ([(48)V]TiO2NP) with a median aggregate/agglomerate size of 70 nm in aqueous suspension after intravenous (IV) injection into female Wistar rats...
April 3, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28287003/non-specific-adsorption-of-complement-proteins-affects-complement-activation-pathways-of-gold-nanomaterials
#16
Quang Huy Quach, James Chen Yong Kah
The complement system is a key humoral component of innate immunity, serving as the first line of defense against intruders, including foreign synthetic nanomaterials. Although gold nanomaterials (AuNMs) are widely used in nanomedicine, their immunological response is not well understood. Using AuNMs of three shapes commonly used in biomedical applications: spherical gold nanoparticles, gold nanostars and gold nanorods, we demonstrated that AuNMs activated whole complement system, leading to the formation of SC5b-9 complex...
April 3, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28285566/involvement-of-the-cytokine-ido1-ahr-loop-in-zinc-oxide-nanoparticle-induced-acute-pulmonary-inflammation
#17
Chia-Chi Ho, Hui-Ling Lee, Chao-Yu Chen, Yueh-Hsia Luo, Ming-Hsien Tsai, Hui-Ti Tsai, Pinpin Lin
Zinc oxide nanoparticles (ZnONPs) are widely used in our daily life, such as in sunscreens and electronic nanodevices. However, pulmonary exposure to ZnONPs causes acute pulmonary inflammation, which is considered as an initial event for various respiratory diseases. Thus, elucidation of the underlying cellular mechanisms of ZnONPs can help us in predicting their potential effects in respiratory diseases. In this study, we observed that ZnONPs increased proinflammatory cytokines, accompanied with an increased expression of aryl hydrocarbon receptor (AhR) and its downstream target cytochrome P450 1A1 (CYP1A1) in macrophages in vitro and in mouse lung epithelia in vivo...
April 3, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28286999/an-assessment-of-the-importance-of-exposure-routes-to-the-uptake-and-internal-localisation-of-fluorescent-nanoparticles-in-zebrafish-danio-rerio-using-light-sheet-microscopy
#18
L M Skjolding, G Ašmonaitė, R I Jølck, T L Andresen, H Selck, A Baun, J Sturve
A major challenge in nanoecotoxicology is finding suitable methods to determine the uptake and localisation of nanoparticles on a whole-organism level. Some uptake methods have been associated with artefacts induced by sample preparation, including staining for electron microscopy. This study used light sheet microscopy (LSM) to define the uptake and localisation of fluorescently labelled nanoparticles in living organisms with minimal sample preparation. Zebrafish (Danio rerio) were exposed to fluorescent gold nanoparticles (Au NPs) and fluorescent polystyrene NPs via aqueous or dietary exposure...
March 29, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28285553/carbon-nanopowder-acts-as-a-trojan-horse-for-benzo-%C3%AE-pyrene-in-danio-rerio-embryos
#19
A Binelli, L Del Giacco, N Santo, L Bini, S Magni, M Parolini, L Madaschi, A Ghilardi, D Maggioni, M Ascagni, A Armini, L Prosperi, C Landi, C La Porta, C Della Torre
Carbon-based nanoparticles (CBNs) are largely distributed worldwide due to fossil fuel combustion and their presence in many consumer products. In addition to their proven toxicological effects in several biological models, attention in recent years has focussed on the role played by CBNs as Trojan-horse carriers for adsorbed environmental pollutants. This role has not been conclusively determined to date because CBNs can decrease the bioavailability of contaminants or represent an additional source of intake...
March 28, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28330416/the-way-to-cover-prediction-for-cytotoxicity-for-all-existing-nano-sized-metal-oxides-by-using-neural-network-method
#20
Natalja Fjodorova, Marjana Novic, Agnieszka Gajewicz, Bakhtiyor Rasulev
The regulatory agencies should fulfil the data gap in toxicity for new chemicals including nano-sized compounds, like metal oxides nanoparticles (MeOx NPs) according to the REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) legislation policy. The present study demonstrates the perspective capability of neural network models for prediction of cytotoxicity of MeOx NPs to bacteria Escherichia coli (E. coli) for the widest range of metal oxides extracted from Periodic table. The Counter Propagation Artificial Neural Network (CP ANN) models for prediction of cytotoxicity of MeOx NPs for data sets of 17, 36 and 72 metal oxides were employed in the study...
March 23, 2017: Nanotoxicology
journal
journal
40853
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"