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Archives of Toxicology

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https://www.readbyqxmd.com/read/28623480/the-current-debate-on-cost-burden-by-human-exposure-to-endocrine-disrupting-chemicals
#1
EDITORIAL
Hermann M Bolt
No abstract text is available yet for this article.
June 16, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28620673/first-evidence-of-pyrrolizidine-alkaloid-n-oxide-induced-hepatic-sinusoidal-obstruction-syndrome-in-humans
#2
Mengbi Yang, Jianqing Ruan, Hong Gao, Na Li, Jiang Ma, Junyi Xue, Yang Ye, Peter Pi-Cheng Fu, Jiyao Wang, Ge Lin
Pyrrolizidine alkaloids (PAs) are among the most potent phytotoxins widely distributed in plant species around the world. PA is one of the major causes responsible for the development of hepatic sinusoidal obstruction syndrome (HSOS) and exerts hepatotoxicity via metabolic activation to form the reactive metabolites, which bind with cellular proteins to generate pyrrole-protein adducts, leading to hepatotoxicity. PA N-oxides coexist with their corresponding PAs in plants with varied quantities, sometimes even higher than that of PAs, but the toxicity of PA N-oxides remains unclear...
June 15, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28620672/re-tarazona-et-al-2017-glyphosate-toxicity-and-carcinogenicity-a-review-of-the-scientific-basis-of-the-european-union-assessment-and-its-differences-with-iarc-doi-10-1007-s00204-017-1962-5
#3
LETTER
https://www.readbyqxmd.com/read/28616630/experimental-and-computational-insights-on-the-recognition-mechanism-between-the-estrogen-receptor-%C3%AE-with-bisphenol-compounds
#4
Huiming Cao, Fengbang Wang, Yong Liang, Hailin Wang, Aiqian Zhang, Maoyong Song
Certain bisphenols (BPs) have been regarded as endocrine-disrupting chemicals due to their structural similarities to bisphenol A (BPA), a well-known weak estrogenic chemical. However, very limited data are currently available on the relationship between estrogenic activity and the structure of BP analogs. Therefore, we systematically investigated the estrogenic potency of 14 selected BP analogs with typical structures using experimental and computational methods. Most of the tested BP analogs exhibited weak estrogenic activities in both cell proliferation and MVLN assays with the exception of TBBPA, TCBPA and TBBPS...
June 14, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28612261/low-concentrations-of-antimony-impair-dna-damage-signaling-and-the-repair-of-radiation-induced-dsb-in-hela-s3-cells
#5
Barbara Koch, Elena Maser, Andrea Hartwig
Antimony is utilized in a large variety of industrial applications, leading to significant environmental and occupational exposure. Mainly based on animal experiments, the IARC and MAK Commission have classified antimony and its inorganic compounds as Group 2B or 2 carcinogens, respectively. However, the underlying mode(s) of action are still largely unknown. In the present study, we investigated the impact of non-cytotoxic up to cytotoxic concentrations of SbCl3 on DNA DSB repair and cell cycle control in HeLa S3 cells...
June 13, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28612260/utility-of-spherical-human-liver-microtissues-for-prediction-of-clinical-drug-induced-liver-injury
#6
William R Proctor, Alison J Foster, Jennifer Vogt, Claire Summers, Brian Middleton, Mark A Pilling, Daniel Shienson, Monika Kijanska, Simon Ströbel, Jens M Kelm, Paul Morgan, Simon Messner, Dominic Williams
Drug-induced liver injury (DILI) continues to be a major source of clinical attrition, precautionary warnings, and post-market withdrawal of drugs. Accordingly, there is a need for more predictive tools to assess hepatotoxicity risk in drug discovery. Three-dimensional (3D) spheroid hepatic cultures have emerged as promising tools to assess mechanisms of hepatotoxicity, as they demonstrate enhanced liver phenotype, metabolic activity, and stability in culture not attainable with conventional two-dimensional hepatic models...
June 13, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28607998/highlight-report-adaptations-of-the-biliary-tree-to-cholestasis
#7
EDITORIAL
Reham Hassan
No abstract text is available yet for this article.
June 12, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28601966/boron-and-its-compounds-current-biological-research-activities
#8
EDITORIAL
Hermann M Bolt, Yalçın Duydu, Nurşen Başaran, Klaus Golka
No abstract text is available yet for this article.
June 10, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28597291/multiple-drug-transporters-mediate-the-placental-transport-of-sulpiride
#9
Mengru Bai, Zhiyuan Ma, Dongli Sun, Caihong Zheng, Yayun Weng, Xi Yang, Ting Jiang, Huidi Jiang
Sulpiride is a typical antipsychotic drug for the treatment of schizophrenia, depression and other psychological disorders. It has been proven that a small amount of sulpiride could cross the human placenta using an ex vivo placental perfusion model. However, the placental transfer mechanism has not been elucidated. Considering the structure of sulpiride, we speculated that the transporters expressed in placenta might be involved in sulpiride uptake across the blood-placenta barrier. The aim of our study was to determine which transporters contributed to the placental transfer of sulpiride...
June 9, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28597227/a-hemoglobin-adduct-as-a-biomarker-for-the-internal-exposure-to-the-rodent-carcinogen-furfuryl-alcohol
#10
Benjamin Sachse, Jan Hielscher, Alfonso Lampen, Klaus Abraham, Bernhard H Monien
Furfuryl alcohol is a common food contaminant, which is formed by acid- and heat-catalyzed degradation of fructose and glucose. Its carcinogenic effect in rodents originates most likely from sulfotransferase (SULT)-catalyzed conversion into the mutagenic sulfate ester 2-sulfoxymethylfuran. In this study, a protein adduct biomarker was sought for the medium-term internal exposure to furfuryl alcohol. A UPLC-MS/MS screening showed that the adduct N-((furan-2-yl)methyl)-Val (FFA-Val) at the N-terminus of hemoglobin is a valid target analyte...
June 8, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28593499/in-utero-exposure-to-nicotine-alters-the-development-of-the-rabbit-cardiac-conduction-system-and-provides-a-potential-mechanism-for-sudden-infant-death-syndrome
#11
Anh Tuan Ton, Michael Biet, Jean-Francois Delabre, Nathalie Morin, Robert Dumaine
In-utero exposure to tobacco smoke remains the highest risk factor for sudden infant death syndrome (SIDS). To alleviate the risks, nicotine replacement therapies are often prescribed to women who wish to quit smoking during their pregnancy. Cardiac arrhythmias is considered the final outcome leading to sudden death. Our goal in this study was to determine if exposing rabbit fetus to nicotine altered the cardiac conduction system of newborn kittens in a manner susceptible to cause SIDS. Using neuronal markers and a series of immunohistological and electrophysiological techniques we found that nicotine delayed the development of the cardiac pacemaker center (sinoatrial node) and decreased its innervation...
June 7, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28593498/bpde-induced-genotoxicity-relationship-between-dna-adducts-mutagenicity-in-the-in-vitro-pig-a-assay-and-the-transcriptional-response-to-dna-damage-in-tk6-cells
#12
Ann Liza Piberger, Christopher T Krüger, Bettina M Strauch, Beatrice Schneider, Andrea Hartwig
Benzo[a]pyrene is a known human carcinogen. As underlying mechanism, the induction of stable DNA adducts and mutations have been repeatedly demonstrated. Also, the activation of cellular stress response on the transcriptional level has been described. Nevertheless, the interrelationship between these different events is less well understood, especially at low, for human exposure relevant concentrations. Within the present study, we applied the reactive metabolite benzo[a]pyrene diolepoxide (BPDE) in the nanomolar, non-cytotoxic concentration range in human TK6 cells and quantified the induction and repair of stable DNA adducts at the N (2)-position of guanine by HPLC with fluorescence detection...
June 7, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28577040/highlight-report-n-acetyltransferase-2-and-urinary-bladder-cancer-risk
#13
EDITORIAL
Meinolf Blaszkewicz
No abstract text is available yet for this article.
June 2, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28573455/toxicology-of-silica-nanoparticles-an-update
#14
REVIEW
Sivakumar Murugadoss, Dominique Lison, Lode Godderis, Sybille Van Den Brule, Jan Mast, Frederic Brassinne, Noham Sebaihi, Peter H Hoet
Large-scale production and use of amorphous silica nanoparticles (SiNPs) have increased the risk of human exposure to SiNPs, while their health effects remain unclear. In this review, scientific papers from 2010 to 2016 were systematically selected and sorted based on in vitro and in vivo studies: to provide an update on SiNPs toxicity and to address the knowledge gaps indicated in the review of Napierska (Part Fibre Toxicol 7:39, 2010). Toxicity of SiNPs in vitro is size, dose, and cell type dependent. SiNPs synthesized by wet route exhibited noticeably different biological effects compared to thermal route-based SiNPs...
June 1, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28560483/conditional-loss-of-hepatocellular-hedgehog-signaling-in-female-mice-leads-to-the-persistence-of-hepatic-steroidogenesis-androgenization-and-infertility
#15
Christiane Rennert, Franziska Eplinius, Ute Hofmann, Janina Johänning, Franziska Rolfs, Wolfgang Schmidt-Heck, Reinhardt Guthke, Rolf Gebhardt, Albert M Ricken, Madlen Matz-Soja
The Hedgehog signaling pathway is known to be involved in embryogenesis, tissue remodeling, and carcinogenesis. Because of its involvement in carcinogenesis, it seems an interesting target for cancer therapy. Indeed, Sonidegib, an approved inhibitor of the Hedgehog receptor Smoothened (Smo), is highly active against diverse carcinomas, but its use is also reported to be associated with several systemic side effects. Our former work in adult mice demonstrated hepatic Hedgehog signaling to play a key role in the insulin-like growth factor axis and lipid metabolism...
May 30, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28555334/prenatal-nicotine-exposure-induces-hpa-axis-hypersensitivity-in-offspring-rats-via-the-intrauterine-programming-of-up-regulation-of-hippocampal-gad67
#16
Xia He, Juan Lu, Wanting Dong, Zhexiao Jiao, Chong Zhang, Ying Yu, Zhaohui Zhang, Hui Wang, Dan Xu
The intrauterine programming of hypothalamic-pituitary-adrenal (HPA) axis hypersensitivity is associated with chronic adult diseases. Our previous studies demonstrated the HPA-axis hypersensitivity in offspring rats induced by prenatal nicotine exposure. The goal of the present study is to further investigate the intrauterine programming mechanism. Pregnant Wistar rats were subcutaneously administered with 2.0 mg/kg day of nicotine from gestational day (GD) 9-20. A group of the pregnant rats was euthanized at GD20, and the fetal rats were extracted...
May 29, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28551711/why-are-most-phospholipidosis-inducers-also-herg-blockers
#17
Svetoslav Slavov, Iva Stoyanova-Slavova, Shuaizhang Li, Jinghua Zhao, Ruili Huang, Menghang Xia, Richard Beger
Recent reports have noted that a number of compounds that block the human Ether-à-go-go related gene (hERG) ion channel also induce phospholipidosis (PLD). To explore a hypothesis explaining why most PLD inducers are also hERG inhibitors, a modeling approach was undertaken with data sets comprised of 4096 compounds assayed for hERG inhibition and 5490 compounds assayed for PLD induction. To eliminate the chemical domain effect, a filtered data set of 567 compounds tested in quantitative high-throughput screening (qHTS) format for both hERG inhibition and PLD induction was constructed...
May 27, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28551710/on-the-mechanisms-of-melatonin-in-protection-of-aluminum-phosphide-cardiotoxicity
#18
Mohammad Hossein Asghari, Milad Moloudizargari, Maryam Baeeri, Amir Baghaei, Mahban Rahimifard, Reza Solgi, Abbas Jafari, Hamed Haghi Aminjan, Shokoufeh Hassani, Ali Akbar Moghadamnia, Seyed Nasser Ostad, Mohammad Abdollahi
Aluminum phosphide (AlP), one of the most commonly used pesticides worldwide, has been the leading cause of self-poisoning mortalities among many Asian countries. The heart is the main organ affected in AlP poisoning. Melatonin has been previously shown to be beneficial in reversing toxic changes in the heart. The present study reveals evidence on the probable protective effects of melatonin on AlP-induced cardiotoxicity in rats. The study groups included a control (almond oil only), ethanol 5% (solvent), sole melatonin (50 mg/kg), AlP (16...
May 27, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28540406/commentary-to-merwin-sj-obis-t-nunez-y-re-db-2017-organophosphate-neurotoxicity-to-the-voluntary-motor-system-on-the-trail-of-environment-caused-amyotrophic-lateral-sclerosis-the-known-the-misknown-and-the-unknown-arch-toxicol-epub-ahead-of-print-doi-10-1007
#19
LETTER
https://www.readbyqxmd.com/read/28536864/rabbit-n-acetyltransferase-2-genotyping-method-to-investigate-role-of-acetylation-polymorphism-on-n-and-o-acetylation-of-aromatic-and-heterocyclic-amine-carcinogens
#20
David W Hein, Mark A Doll
The rabbit was the initial animal model to investigate the acetylation polymorphism expressed in humans. Use of the rabbit model is compromised by lack of a rapid non-invasive method for determining acetylator phenotype. Slow acetylator phenotype in the rabbit results from deletion of the N-acetyltransferase 2 (NAT2) gene. A relatively quick and non-invasive method for identifying the gene deletion was developed and acetylator phenotypes confirmed by measurement of N- and O-acetyltransferase activities in hepatic cytosols...
May 23, 2017: Archives of Toxicology
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