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Toxicology in Vitro: An International Journal Published in Association with BIBRA

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https://www.readbyqxmd.com/read/28633979/zerumbone-modulates-cd1d-expression-and-lipid-antigen-presentation-pathway-in-breast-cancer-cells
#1
Ritis K Shyanti, Anuradha Sehrawat, Shivendra V Singh, J P N Mishra, Rana P Singh
Natural Killer T (NKT) cells based cancer immunotherapy is an evolving area of cancer therapy, but tumors escape from this treatment modality by altering CD1d expression and its antigen presentation pathway. Here, we have studied the relation of CD1d expression in various breast cancer cell lines to their viability and progression. We observed a novel phenomenon that CD1d expression level increases with the progressive stage of the cancer. A small molecule, zerumbone (ZER) caused down-regulation of CD1d that was accompanied by breast cancer cell growth in vitro...
June 17, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28633978/airborne-nitro-pahs-induce-nrf2-are-defense-system-against-oxidative-stress-and-promote-inflammatory-process-by-activating-pi3k-akt-pathway-in-a549-cells
#2
Yu Shang, Qian Zhou, Tiantian Wang, Yuting Jiang, Yufang Zhong, Guangren Qian, Tong Zhu, Xinghua Qiu, Jing An
Ambient particulate matter (PM) is a worldwide health issue of concern. However, limited information is available regarding the toxic contributions of the nitro-derivatives of polycyclic aromatic hydrocarbons (nitro-PAHs). This study intend to examine whether 1-nitropyrene (1-NP) and 3-nitrofluoranthene (3-NF) could activate the nuclear factor-erythroid 2-related factor 2/antioxidant response element (Nrf2/ARE) antioxidant defense system, and whether the phosphatidylinositol 3-kinase/protein kinase B (PI3K/Akt) pathway participates in regulating pro-inflammatory responses in A549 cells...
June 17, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28629855/con4ei-development-of-serious-eye-damage-and-eye-irritation-testing-strategies-with-respect-to-the-requirements-of-the-un-ghs-eu-clp-hazard-categories
#3
Sandra Verstraelen, An R Van Rompay
The main objective of the CON4EI (CONsortium for in vitro Eye Irritation testing strategy) project (2015-2016) was to develop tiered, non-animal testing strategies for serious eye damage and eye irritation assessment in relation to the most important drivers of classification. The serious eye damage and eye irritation potential of a set of 80 chemicals was identified based on existing in vivo Draize eye test data and testing was conducted using the following eight alternative test methods: BCOP (Bovine Corneal Opacity and Permeability)+histopathology, BCOP-LLBO (BCOP Laser Light-Based Opacitometer), ICE (Isolated Chicken Eye)+histopathology, STE (Short Term Exposure), EpiOcular™ EIT (EpiOcular Eye Irritation Test), EpiOcular™ ET-50 (EpiOcular™ Time-to-toxicity), SkinEthic™ HCE EIT (SkinEthic™ Human Corneal Epithelial Eye Irritation Test), and SMI (Slug Mucosal Irritation)...
June 16, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28629854/inhibition-of-organic-anion-transporter-oat-activity-by-cigarette-smoke-condensate
#4
Katia Sayyed, Marc Le Vee, Ziad Abdel-Razzak, Olivier Fardel
Cigarette smoke condensate (CSC) has previously been shown to impair activity and expression of hepatic drug transporters. In the present study, we provided evidence that CSC also hinders activity of organic anion transporters (OATs), notably expressed at the kidney level. CSC thus cis-inhibited OAT substrate uptake in OAT1- and OAT3-transfected HEK293 cells, in a concentration-dependent manner (IC50=72.1μg/mL for OAT1 inhibition and IC50=27.3μg/mL for OAT3 inhibition). By contrast, OAT4 as well as the renal organic cation transporter (OCT) 2 were less sensitive to the inhibitory effect of CSC (IC50=351...
June 16, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28625465/con4ei-skinethic%C3%A2-human-corneal-epithelial-eye-irritation-test-skinethic%C3%A2-hce-eit-for-hazard-identification-and-labelling-of-eye-irritating-chemicals
#5
A R Van Rompay, N Alépée, L Nardelli, K Hollanders, V Leblanc, A Drzewiecka, K Gruszka, R Guest, H Kandarova, J A Sr Willoughby, S Verstraelen, E Adriaens
Assessment of ocular irritancy is an international regulatory requirement and a necessary step in the safety evaluation of industrial and consumer products. Although a number of in vitro ocular irritation assays exist, none are capable of fully categorizing chemicals as a stand-alone assay. Therefore, the CEFIC-LRI-AIMT6-VITO CON4EI (CONsortium for in vitro Eye Irritation testing strategy) project was developed with the goal of assessing the reliability of eight in vitro/alternative test methods as well as establishing an optimal tiered-testing strategy...
June 15, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28624474/-exposure-to-the-insecticides-permethrin-and-malathion-induces-leukemia-and-lymphoma-associated-gene-aberrations-in-vitro
#6
M P Navarrete-Meneses, C Salas-Labadía, M Sanabrais-Jiménez, J Santana-Hernández, A Serrano-Cuevas, R Juárez-Velázquez, A Olaya-Vargas, P Pérez-Vera
Epidemiological studies have associated the exposure to permethrin and malathion with increased risk of leukemia and lymphoma. The aim of this study was to evaluate whether in vitro exposure to permethrin and malathion induces aberrations in genes involved in the etiology of these hematological malignancies. Genetic abnormalities in the IGH, KMT2A (MLL), ETV6 and RUNX1 genes; and aneuploidy induced by the in vitro exposure to permethrin and malathion (200μM, 24h), were analyzed by FISH in peripheral blood mononuclear cells (PBMCs)...
June 14, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28627426/neurodegenerative-signaling-factors-and-mechanisms-in-parkinson-s-pathology
#7
REVIEW
Poonam Goswami, Neeraj Joshi, Sarika Singh
Parkinson's disease (PD) is a chronic and progressive degenerative disorder of central nervous system which is mainly characterized by selective loss of dopaminergic neurons in the nigrostrial pathway. Clinical symptoms of this devastating disease comprise motor impairments such as resting tremor, bradykinesia, postural instability and rigidity. Current medications only provide symptomatic relief but fail to halt the dopaminergic neuronal death. While the etiology of dopaminergic neuronal death is not fully understood, combination of various molecular mechanisms seems to play a critical role...
June 13, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28619522/integrated-analysis-of-paraquat-induced-micrornas-mrnas-changes-in-human-neural-progenitor-cells
#8
Mengling Yan, Tingting Dou, Wen Lv, Xinjin Wang, Lina Zhao, Xiuli Chang, Zhijun Zhou
Paraquat (PQ), one of the most widely used fast-acting and non-selective herbicides in the world is believed to act as a neurotoxicant, which increases the risk of developing Parkinson's disease (PD) by selectively impairing dopaminergic neurons. However, the mechanism of PQ on neural progenitor cells remains unclear. As regulator of mRNA expression, miRNA play a crucial role in neurotoxicity. Based on our previous study, we chose 10μM PQ, which induced ROS production and inhibited proliferation but not reduced the cell viability...
June 12, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28619521/overview-of-long-non-coding-rna-and-mrna-expression-in-response-to-methamphetamine-treatment-in-vitro
#9
Kun Xiong, Lingling Long, Xudong Zhang, Hongke Qu, Haixiao Deng, Yanjun Ding, Jifeng Cai, Shuchao Wang, Mi Wang, Lvshuang Liao, Jufang Huang, Chunxia Yi, Jie Yan
Long non-coding RNAs (lncRNAs) display multiple functions including regulation of neuronal injury. However, their impact in methamphetamine (METH)-induced neurotoxicity has rarely been reported. Here, using microarray analysis, we investigated the expression profiling of lncRNAs and mRNAs in primary cultured prefrontal cortical neurons after METH treatment. We observed a difference in lncRNA and mRNA expression between the experimental and sham control groups. Using bioinformatics, we analyzed the highest enriched gene ontology (GO) terms of biological process, cellular component, and molecular function, and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway and pathway network analysis...
June 12, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28606429/mebendazole-an-antiparasitic-drug-inhibits-drug-transporters-expression-in-preclinical-model-of-gastric-peritoneal-carcinomatosis
#10
Laine Celestino Pinto, Caroline de Fátima Aquino Moreira-Nunes, Bruno Moreira Soares, Rommel Mário Rodriguez Burbano, José Alexandre Rodrigues de Lemos, Raquel Carvalho Montenegro
The present study aimed to investigate whether MBZ down-regulates drug transporter expression (ABCB1, ABCC1, SLC47A1). mRNA expression level of ABCB1, ABCC1 and SLC47A1 was evaluated by qPCR and protein expression levels MDR-1 was performed by western blotting in malignant ascites cells (AGP-01) treated with MBZ for 24h. The mRNA expression level of ABCB1 and ABCC1 significantly decreased at a 1.0μM of MBZ compared to negative control, while SLC47A1 extremely decreased at all tested concentrations of MBZ. Protein expression levels MDR-1 significantly decreased at a 1...
June 9, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28606428/cytotoxicity-and-immunomodulatory-effects-of-sol-gel-combustion-based-titanium-dioxide-tio2-particles-of-large-surface-area-on-raw-264-7-macrophages
#11
Palani Dinesh, C Suresh Yadav, Sathanandhan Kannadasan, Mahaboobkhan Rasool
The current study was designed to investigate the cytotoxicity and immunomodulatory effects of sol-gel combustion based TiO2 particles (glycine and l-alanine as reducing agents) of large surface area on RAW 264.7 macrophages. RAW 264.7 macrophages exposed to varying concentrations of TiO2 particles (0.001 to 1000μg/ml) were assessed after 24h and showed a reduced cell viability at 100 and 1000μg/ml and increased LDH release at 10μg/ml. Furthermore, TiO2 particles (0.1, 1 and 10μg/ml) were utilized to assess the immune responses and intracellular ROS levels on RAW 264...
June 9, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28602853/het-cam-test-application-to-shampoos-in-developing-countries
#12
Mohamaded Tahar Taha Derouiche, Sara Abdennour
INTRODUCTION: The use of in vitro methods for the control of cosmetic products in developing countries must overcome cost, feasibility and an unfavourable regulatory environment. Among these products, shampoos occupy an important part of the market but present a number of risks related to their use like eye irritation. The aim of this work is to propose the HET-CAM test as a method of screening the risk of eye irritation of shampoos, adapting it to the technical and regulatory conditions of a developing country such as Algeria...
June 8, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28599845/evaluating-a-novel-oxygenating-therapeutic-for-its-potential-use-in-the-advancement-of-wound-healing
#13
Jennifer Gueldner, Fan Zhang, Bernd Zechmann, Erica D Bruce
Non-gaseous oxygen therapeutics are emerging technologies in regenerative medicine that aim to sidestep the undesirable effects seen in traditional oxygen therapies, while enhancing tissue and wound regeneration. Using a novel oxygenating therapeutic (Ox66™) several in vitro models including fibroblast and keratinocyte monocultures were evaluated for potential drug toxicity, the ability of cells to recover after chemical injury, and cell migration after scratch assay. It was determined that in both cell lines, there was no significant cytotoxicity found after independent treatment with Ox66™...
June 7, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28599844/somatoform-and-neurocognitive-syndromes-after-hpv-immunization-are-not-associated-to-cell-mediated-hypersensitivity-to-aluminum
#14
Dimitri Poddighe, Maria Vadalà, Carmen Laurino, Beniaminoi Palmieri
Vaccines against human papilloma virus (HPV) have been demonstrated to be very effective to prevent infection-related neoplasms. However, several reports describing heterogeneous post-vaccination phenomena have been published in last few years. The spectrum of these disorders includes both immune-mediated neurological diseases and neuropsychiatric functional disorders. Some researchers speculated about a genetic predisposition, but others hypothesized a role of adjuvants, including some metals and, particularly, aluminum...
June 6, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28595835/the-effect-of-resveratrol-its-naturally-occurring-derivatives-and-tannic-acid-on-the-induction-of-cell-cycle-arrest-and-apoptosis-in-rat-c6-and-human-t98g-glioma-cell-lines
#15
Małgorzata Zielińska-Przyjemska, Mariusz Kaczmarek, Violetta Krajka-Kuźniak, Michał Łuczak, Wanda Baer-Dubowska
Resveratrol (3,5,4'-trihydroxy-trans-stilbene) is a potent chemopreventive and potentially cancer therapeutic agent. Since rapid metabolism limits resveratrol bioavailability, derivatives less prone to metabolic transformation are being sought and tested. We evaluated the effect of resveratrol, and its analogs (pterostilbene and 3,5,4'-trimethoxystilbene) along with tannic acid, on cell cycle and apoptosis in rat C6 and human T98G glioma cells. At concentration ranges both lower and higher than IC50 calculated based on MTT assay, all these polyphenols affected the cell cycle distribution...
June 6, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28595837/application-of-caenorhabditis-elegans-nematode-and-danio-rerio-embryo-zebrafish-as-model-systems-to-screen-for-developmental-and-reproductive-toxicity-of-piperazine-compounds
#16
Peter I Racz, Marjolein Wildwater, Martijn Rooseboom, Engelien Kerkhof, Raymond Pieters, Elena Santidrian Yebra-Pimentel, Ron P Dirks, Herman P Spaink, Chantal Smulders, Graham F Whale
To enable selection of novel chemicals for new processes, there is a recognized need for alternative toxicity screening assays to assess potential risks to man and the environment. For human health hazard assessment these screening assays need to be translational to humans, have high throughput capability, and from an animal welfare perspective be harmonized with the principles of the 3Rs (Reduction, Refinement, Replacement). In the area of toxicology a number of cell culture systems are available but while these have some predictive value, they are not ideally suited for the prediction of developmental and reproductive toxicology (DART)...
June 5, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28595836/con4ei-selection-of-the-reference-chemicals-for-hazard-identification-and-labelling-of-eye-irritating-chemicals
#17
E Adriaens, N Alépée, H Kandarova, A Drzewieckac, K Gruszka, R Guest, J A Willoughby, S Verstraelen, A R Van Rompay
Assessment of the acute eye irritation potential is part of the international regulatory requirements for testing of chemicals. In the past, several prospective and retrospective validation studies have taken place in the area of serious eye damage/eye irritation testing. Success in terms of complete replacement of the regulatory in vivo Draize rabbit eye test has not yet been achieved. A very important aspect to ensure development of successful alternative test methods and/or strategies for serious eye damage/eye irritation testing is the selection of appropriate reference chemicals...
June 5, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28578006/increased-sat2-expression-is-associated-with-busulfan-induced-testicular-sertoli-cell-injury
#18
Yi Xian, Mingjun Wu, Yaping Liu, Jie Hao, Yu Wu, Xiaogang Liao, Gang Li
Busulfan is a chemotherapeutic agent used to treat chronic myelogenous leukemia and other myeloproliferative disorders. Increasing evidence has demonstrated that busulfan may induce testicular dysfunction by targeting genes that are expressed in the testis. Here, we showed that spermidine/spermine N1-acetyltransferase 2 (Sat2) was present in testicular Sertoli cells, and its expression was significantly increased by busulfan treatment. To investigate the implications of Sat2 upregulation for cell growth and function, a Sat2-overexpressing TM4 Sertoli cell model was established...
June 1, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28578007/sensitivity-of-hips-derived-neural-stem-cells-nsc-to-pyrroloquinoline-quinone-depends-on-their-developmental-stage
#19
J Augustyniak, J Lenart, M Zychowicz, G Lipka, P Gaj, M Kolanowska, P P Stepien, L Buzanska
Pyrroloquinoline quinone (PQQ) is a factor influencing on the mitochondrial biogenesis. In this study the PQQ effect on viability, total cell number, antioxidant capacity, mitochondrial biogenesis and differentiation potential was investigated in human induced Pluripotent Stem Cells (iPSC) - derived: neural stem cells (NSC), early neural progenitors (eNP) and neural progenitors (NP). Here we demonstrated that sensitivity to PQQ is dependent upon its dose and neural stage of development. Induction of the mitochondrial biogenesis by PQQ at three stages of neural differentiation was evaluated at mtDNA, mRNA and protein level...
May 31, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28576679/effects-of-low-doses-of-carbendazim-or-iprodione-either-separately-or-in-mixture-on-the-pubertal-rat-seminiferous-epithelium-an-ex-vivo-study
#20
Philippe Durand, Guillaume Martin, Antonine Blondet, Jérôme Gilleron, Diane Carette, Stéphane Janczarski, Emilie Christin, Georges Pointis, Marie-Hélène Perrard
It has been shown that non-cytotoxic doses of Carbendazim (CBZ), a broad-spectrum benzimidazole fungicide, possess endocrine-disrupting (androgen-like) actions, ex vivo, on the pubertal rat seminiferous epithelium. Iprodione (IPR), a dicarboximide fungicide, is also known to be an endocrine-disrupter (anti-androgen). The effect of a mixture of these two pesticides was investigated in the validated rat seminiferous tubule culture model. Cultures were performed in the absence or presence of CBZ 50nM or IPR 50nM either alone or in mixture (Mix), over a 3-week period...
May 30, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
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