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Journal of Applied Toxicology: JAT

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https://www.readbyqxmd.com/read/28799656/review-of-the-effects-of-manufactured-nanoparticles-on-mammalian-target-organs
#1
REVIEW
Tianshu Wu, Meng Tang
Nanotechnology had matured significantly during the last two decades as it has transitioned from bench top science to applied technology. Even though the issue of safety of nanotechnology has been raised nearly one decade ago, the rapid progress in development and use of nanomaterials has not yet been matched by toxicological investigations. Many recent studies have simply outlined the toxic effects of nanoparticles (NPs), but few have systematically addressed their potentially adverse biological effects on target organs...
August 11, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28745436/comparison-of-four-different-fuller-s-earth-formulations-in-skin-decontamination
#2
Annick Roul, Cong-Anh-Khanh Le, Marie-Paule Gustin, Emmanuel Clavaud, Bernard Verrier, Fabrice Pirot, Françoise Falson
Industrial accidents, wars and terrorist threats are potential sources of skin contamination by highly toxic chemical warfare agents and manufacturing compounds. We have compared the time-dependent adsorption capacity and decontamination efficiency of fuller's earth (FE) for four different formulations for the molecular tracer, 4-cyanophenol (4-CP), in vitro and ex vivo using water decontamination as standard. The adsorption capacity of FE was assessed in vitro for 4-CP aqueous solutions whereas decontamination efficiency was investigated ex vivo by tracking porcine skin 4-CP content using attenuated total reflectance Fourier transform infrared spectroscopy...
July 26, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28744932/introduction-to-graphene-special-edition
#3
EDITORIAL
Roger Buchanan
No abstract text is available yet for this article.
July 25, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28744887/in-vitro-evaluation-of-the-internalization-and-toxicological-profile-of-silica-nanoparticles-and-submicroparticles-for-the-design-of-dermal-drug-delivery-strategies
#4
Sara Vicente, Claudia Moia, Huijun Zhu, Xavier Vigé
The use of colloidal silica nanoparticles and sub-microparticles (SiPs) have been considered a very interesting strategy for drug delivery applications. In the present study, we have focused our attention on the suitability of these nanomaterials as potential carriers for dermal drug delivery, thus studying their toxicological profile in vitro, cellular uptake and intracellular localization in both human keratinocytes (K17) and human dermal fibroblasts (HDF) as a function of their particle size (SiPs of 20, 70, 200 and 500 nm)...
July 25, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28730725/targeting-nano-drug-delivery-to-cancer-cells-using-tunable-multi-layer-silver-decorated-gold-nanorods
#5
Zeid A Nima, Ahmed M Alwbari, Vijayalakshmi Dantuluri, Rabab N Hamzah, Natasha Sra, Pooja Motwani, Konstantinos Arnaoutakis, Rebecca A Levy, Amani F Bohliqa, Dmitry Nedosekin, Vladimir P Zharov, Issam Makhoul, Alexandru S Biris
Multifunctional nanoparticles have high potential as targeting delivery vehicles for cancer chemotherapy. In this study, silver-decorated gold nanorods (AuNR\Ag) have been successfully used to deliver specific, targeted chemotherapy against breast cancer (MCF7) and prostate carcinoma (PC3) cell lines. Doxorubicin, a commonly used chemotherapy, and anti-Epithelial cell adhesion molecule (anti-EpCAM) antibodies were covalently bonded to thiolated polyethylene glycol-coated AuNR\Ag, and the resultant system was used to deliver the drugs to cancer cells in vitro...
July 21, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28695982/combinations-of-genotoxic-tests-for-the-evaluation-of-group-1-iarc-carcinogens
#6
REVIEW
Jacky Bhagat
Many of the known human carcinogens are potent genotoxins that are efficiently detected as carcinogens in human populations but certain types of compounds such as immunosuppressants, sex hormones, etc. act via non-genotoxic mechanism. The absence of genotoxicity and the diversity of modes of action of non-genotoxic carcinogens make predicting their carcinogenic potential extremely challenging. There is evidence that combinations of different short-term tests provide a better and efficient prediction of human genotoxic and non-genotoxic carcinogens...
July 11, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28691739/nuclear-magnetic-resonance-and-mass-spectometry-based-metabolomics-to-study-maleic-acid-toxicity-from-repeated-dose-exposure-in-rats
#7
Charlene Wu, Chi-Hung Chen, Hsin-Chang Chen, Hao-Jan Liang, Shu-Ting Chen, Wan-Yu Lin, Kuen-Yuh Wu, Su-Yin Chiang, Ching-Yu Lin
Maleic acid (MA), a chemical intermediate used in many consumer and industrial products, was intentionally adulterated in a variety of starch-based foods and instigated food safety incidents in Asia. We aim to elucidate possible mechanisms of MA toxicity after repeated exposure by (1) determining the changes of metabolic profile using (1) H nuclear magnetic resonance spectroscopy and multivariate analysis, and (2) investigating the occurrence of oxidative stress using liquid chromatography tandem mass spectrometry by using Sprague-Dawley rat urine samples...
July 10, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28685832/assessment-of-genotoxicity-and-biodistribution-of-nano-and-micron-sized-yttrium-oxide-in-rats-after-acute-oral-treatment
#8
Archana Panyala, Srinivas Chinde, Srinivas Indu Kumari, Paramjit Grover
The increasing use of yttrium oxide (Y2 O3 ) nanoparticles (NPs) entails an improved understanding of their potential impact on the environmental and human health. In the present study, the acute oral toxicity of Y2 O3 NPs and their microparticles (MPs) was carried out in female albino Wistar rats with 250, 500 and 1000 mg kg(-1) body weight doses. Before the genotoxicity evaluation, characterization of the particles by transmission electron microscopy, dynamic light scattering and laser Doppler velocimetry was performed...
July 7, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28681937/maternal-nicotine-exposure-leads-to-decreased-cardiac-protein-disulfide-isomerase-and-impaired-mitochondrial-function-in-male-rat-offspring
#9
Nicole G Barra, Maria Lisyansky, Taylor A Vanduzer, Sandeep Raha, Alison C Holloway, Daniel B Hardy
Smoking throughout pregnancy can lead to complications during gestation, parturition and neonatal development. Thus, nicotine replacement therapies are a popular alternative thought to be safer than cigarettes. However, recent studies in rodents suggest that fetal and neonatal nicotine exposure alone results in cardiac dysfunction and high blood pressure. While it is well known that perinatal nicotine exposure causes increased congenital abnormalities, the mechanisms underlying longer-term deficits in cardiac function are not completely understood...
July 6, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28681389/untargeted-metabolomics-of-neuronal-cell-culture-a-model-system-for-the-toxicity-testing-of-insecticide-chemical-exposure
#10
Sarah Hayton, Garth L Maker, Ian Mullaney, Robert D Trengove
Toxicity testing is essential for the protection of human health from exposure to toxic environmental chemicals. As traditional toxicity testing is carried out using animal models, mammalian cell culture models are becoming an increasingly attractive alternative to animal testing. Combining the use of mammalian cell culture models with screening-style molecular profiling technologies, such as metabolomics, can uncover previously unknown biochemical bases of toxicity. We have used a mass spectrometry-based untargeted metabolomics approach to characterize for the first time the changes in the metabolome of the B50 cell line, an immortalised rat neuronal cell line, following acute exposure to two known neurotoxic chemicals that are common environmental contaminants; the pyrethroid insecticide permethrin and the organophosphate insecticide malathion...
July 6, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28677866/increased-incidence-of-non-alcoholic-fatty-liver-disease-in-male-rat-offspring-exposed-to-fluoxetine-during-fetal-and-neonatal-life-involves-the-nlrp3-inflammasome-and-augmented-de-novo-hepatic-lipogenesis
#11
Nicole E De Long, Daniel B Hardy, Noelle Ma, Alison C Holloway
Up to 10% of women take selective serotonin reuptake inhibitors (SSRI) during pregnancy. Children exposed to SSRIs in utero have an increased risk of being overweight suggesting that fetal exposure to SSRIs can cause permanent metabolic changes. We have previously shown in rats that fetal and neonatal exposure to the SSRI antidepressant fluoxetine results in metabolic perturbations including increased hepatic triglyceride content; a hallmark of non-alcoholic fatty liver disease (NAFLD). Therefore, the aim of this study was to identify the mechanism(s) underlying the fluoxetine-induced increase in intrahepatic triglyceride content...
July 5, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28677847/physicochemical-characteristics-of-pristine-and-functionalized-graphene
#12
Shawn E Bourdo, Radwan Al Faouri, Robert Sleezer, Zeid A Nima, Andersen Lafont, Bijay P Chhetri, Mourad Benamara, Betty Martin, Gregory J Salamo, Alexandru S Biris
Graphene-based nanomaterials have received significant attention in the last decade due to their interesting properties. Its electrical and thermal conductivity and strength make graphene well suited for a variety of applications, particularly for use as a composite material in plastics. Furthermore, much work is taking place to utilize graphene as a biomaterial for uses such as drug delivery and tissue regeneration scaffolds. Owing to the rapid progress of graphene and its potential in many marketplaces, the potential toxicity of these materials has garnered attention...
July 5, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28677831/maternal-alcohol-consumption-and-altered-mirnas-in-the-developing-fetus-context-and-future-perspectives
#13
REVIEW
Chanchal Mandal, Debasish Halder, Kyoung Hwa Jung, Young Gyu Chai
Alcohol is a teratogenic agent that can cause a wide range of developmental disorders, and sometimes, the effects persist throughout an individual's lifetime. Researchers have shown the involvement of epigenetic mechanisms in alcohol-mediated disorders. Non-coding RNAs are one of the major sources of epigenetic modifications, especially microRNAs. The association of microRNAs with alcohol consumption leads to a new focus on finding the molecular mechanisms of alcohol toxicity. It has been suggested that alcohol alters the relative expression of microRNAs and regulates target mRNA expression in both in vitro and in vivo models...
July 5, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28677244/endocrine-disruption-in-silico-interactions-between-phthalate-plasticizers-and-corticosteroid-binding-globulin
#14
Ishfaq A Sheikh, Mohd A Beg
Endocrine disruption is a phenomenon when a man-made or natural compound interferes with normal hormone function in human or animal body systems. Endocrine-disrupting compounds (EDCs) have assumed considerable importance as a result of industrial activity, mass production of synthetic chemicals and environmental pollution. Phthalate plasticizers are a group of chemicals used widely and diversely in industry especially in the plastic industry, and many of the phthalate compounds have endocrine-disrupting properties...
July 4, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28653411/impact-of-dispersant-on-early-life-stages-of-the-water-flea-daphnia-magna-and-the-eastern-oyster-crassostrea-virginica
#15
Maryam Salehi, Rachel Rodriguez, Anne Boettcher, Sean Powers, Nick Geitner, David A Ladner, Scott Rikard, Andrew J Whelton
In response to the 2010 Deepwater Horizon oil spill, over 1 million gallons of dispersant were applied in Gulf of Mexico offshore waters; Corexit 9500 was the most applied dispersant. The impact on organisms in nearshore and freshwaters has received little scrutiny. Acute 48 h toxicity of Corexit 9500 and a new hyperbranched polyethylenimine (HPEI) dispersant-like compound were evaluated for the freshwater indicator organism, Daphnia magna and for larval and early spat stages of the Eastern oyster, Crassostrea virginica...
June 27, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28621440/t-lymphocytes-dominate-local-leukocyte-infiltration-in-response-to-intradermal-injection-of-functionalized-graphene-based-nanomaterial
#16
G F Erf, D M Falcon, K S Sullivan, S E Bourdo
Graphene-based nanomaterials (GBN) have many potential biomedical applications. However, information regarding their biological properties and interactions with cells and/or soluble factors within a complex tissue is limited. The objective of this study was to use the growing feather (GF) of chickens as a minimally invasive cutaneous test-site to assess and monitor leukocyte recruitment in response to intradermal GBN injection. Specifically, the dermis of 20 GFs per chicken was injected with 10 μl of phosphate-buffered saline (PBS)-vehicle or 10 μl of 300 μg ml(-1) oxygen-functionalized (f) GBN (6 chickens/treatment)...
June 16, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28608465/effect-of-bisphenol-a-on-reproductive-processes-a-review-of-in-vitro-in-vivo-and-epidemiological-studies
#17
REVIEW
Agnieszka Tomza-Marciniak, Paulina Stępkowska, Jarosław Kuba, Bogumiła Pilarczyk
As bisphenol A (BPA) is characterized by a pronounced influence on human hormonal regulation, particular attention has been aimed at understanding its role in reproductive processes in males and females, as well as on fetal development. Owing to the increasing number of alarming reports on the negative consequences of the presence of BPA in human surroundings, more and more studies are being undertaken to clarify the negative effects of BPA on human reproductive processes. The aim of this work was to collect and summarize data on the influence of BPA exposure on reproductive health...
June 13, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28589558/potential-applications-and-human-biosafety-of-nanomaterials-used-in-nanomedicine
#18
REVIEW
Hong Su, Yafei Wang, Yuanliang Gu, Linda Bowman, Jinshun Zhao, Min Ding
With the rapid development of nanotechnology, potential applications of nanomaterials in medicine have been widely researched in recent years. Nanomaterials themselves can be used as image agents or therapeutic drugs, and for drug and gene delivery, biological devices, nanoelectronic biosensors or molecular nanotechnology. As the composition, morphology, chemical properties, implant sites as well as potential applications become more and more complex, human biosafety of nanomaterials for clinical use has become a major concern...
June 6, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28585774/a-physiologically-based-pharmacokinetic-model-of-vitamin-d
#19
Megan E Sawyer, Hien T Tran, Marina V Evans
Despite the plethora of studies discussing the benefits of vitamin D on physiological functioning, few mathematical models of vitamin D predict the response of the body on low-concentration supplementation of vitamin D under sunlight-restricted conditions. This study developed a physiologically based pharmacokinetic (PBPK) model utilizing published human data on the metabolic cascade of orally derived, low-concentration (placebo, 5 μg and 10 μg) supplementation of vitamin D over the course of 28 days in the absence of sunlight...
June 6, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28585739/iron-oxide-nanoparticles-induced-cytotoxicity-oxidative-stress-and-dna-damage-in-lymphocytes
#20
Usha Singh Gaharwar, Ramovatar Meena, Paulraj Rajamani
Over the past few decades nanotechnology and material science has progressed extremely rapidly. Iron oxide nanoparticles (IONPs) owing to their unique magnetic properties have a great potential for their biomedical and bioengineering applications. However, there is an inevitable need to address the issue of safety and health effects of these nanoparticles. Hence, the present study was aimed to assess the cytotoxic effects of IONPs on rats' lymphocytes. Using different assays, we studied diverse parameters including mitochondrial membrane potential, intracellular accumulation of reactive oxygen species (ROS), lactate dehydrogenase activity, antioxidant enzymes activity and DNA damage measurements...
June 6, 2017: Journal of Applied Toxicology: JAT
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