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https://www.readbyqxmd.com/read/28913781/effects-of-fluoride-and-or-sulfur-dioxide-on-morphology-and-dna-integrity-in-rats-hepatic-tissue
#1
Chen Liang, Yan Gao, Yangfei Zhao, Ram Kumar Manthari, Junjie Ma, Ruiyan Niu, Jinming Wang, Jianhai Zhang, Jundong Wang
This study was aimed to evaluate the toxic effects of fluoride (F) and/or sulfur dioxide (SO2) on morphology and DNA integrity in liver of male rats. For this, 96 Wistar rats (12-week-old) were randomly divided into four groups after 1-week adaptive breeding: the control group, treated with deionized water; the NaF group, administered high F (100 mg NaF/L in the drinking water); the SO2 group, with sulfur dioxide in ambient air (15 ppm SO2, 4 h/day); and NaF + SO2 group, treated with high F and sulfur dioxide together for 8 consecutive weeks...
September 14, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28913689/the-evaluation-of-protective-effect-of-lycopene-against-genotoxic-influence-of-x-irradiation-in-human-blood-lymphocytes
#2
Aneta Gajowik, Małgorzata M Dobrzyńska
Many studies suggest that exogenous antioxidants may protect cells against DNA damage caused with ionizing radiation. One of the most powerful antioxidants is lycopene (LYC), a carotenoid derived from tomatoes. The aim of this study was to investigate, using the comet assay, whether LYC can act as protectors/modifiers and prevent DNA damage induced in human blood lymphocytes, as well as to mitigate the effects of radiation exposure. In this project, LYC, dissolved in DMSO at a concentration of 10, 20 or 40 μM/ml of cell suspension, was added to the isolated lymphocytes from human blood at appropriate intervals before or after the X-irradiation at doses of 0...
September 14, 2017: Radiation and Environmental Biophysics
https://www.readbyqxmd.com/read/28902490/direct-intra-nuclear-anticancer-drug-delivery-via-polydimethylsiloxane-nanoparticles-in-vitro-and-in-vivo-xenograft-studies
#3
Gargi Mishra, Souryadeep Bhattacharyya, Vipul Bhatia, Bushra Ateeq, Ashutosh Sharma, Sri Sivakumar
Direct delivery of anticancer drugs to nuclei of tumor cells is required to enhance the therapeutic activity which can be achieved by a nuclear localization signal (NLS) or peptide-decorated nano-vehicles. However, NLS/peptide-based approaches may create certain undesirable immunological responses and the utilized synthesis processes are generally labor intensive. To this end, we report ligand-free, enhanced intra-nuclear delivery of Doxorubicin (Dox) to different cancer cells via porous polydimethylsiloxane (PDMS) nanoparticles (NPs)...
September 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28901377/anthocyanin%C3%A2-rich-blackcurrant-extract-inhibits-proliferation-of-the-mcf10a-healthy-human-breast-epithelial-cell-line-through-induction-of-g0-g1-arrest-and-apoptosis
#4
Naoki Nanashima, Kayo Horie, Mitsuru Chiba, Manabu Nakano, Hayato Maeda, Toshiya Nakamura
Blackcurrants (Ribes nigrum L., Grossulariaceae) possess a high content of anthocyanin polyphenols, which have been demonstrated to exhibit beneficial effects on health due to their antioxidant and anticarcinogenic prope-rties. The present study investigated novel functions of anthocyanin‑rich blackcurrant extracts (BCEs) in a healthy mammary epithelial cell line, MCF10A. The percentages of viable cells were 85, 75, 53 and 31% following exposure to 50, 100, 200 and 400 µg/ml BCE, respectively. The half‑maximal response concentration of BCE was 237...
August 29, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28900603/a-nanocomplex-of-c60-fullerene-with-cisplatin-design-characterization-and-toxicity
#5
Svitlana Prylutska, Svitlana Politenkova, Kateryna Afanasieva, Volodymyr Korolovych, Kateryna Bogutska, Andriy Sivolob, Larysa Skivka, Maxim Evstigneev, Viktor Kostjukov, Yuriy Prylutskyy, Uwe Ritter
The self-organization of C60 fullerene and cisplatin in aqueous solution was investigated using the computer simulation, dynamic light scattering and atomic force microscopy techniques. The results evidence the complexation between the two compounds. The genotoxicity of С60 fullerene, Cis and their complex was evaluated in vitro with the comet assay using human resting lymphocytes and lymphocytes after blast transformation. The cytotoxicity of the mentioned compounds was estimated by Annexin V/PI double staining followed by flow cytometry...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28895434/genetic-variation-and-risk-of-dna-damage-in-peripheral-blood-lymphocytes-of-iranian-formaldehyde-exposed-workers
#6
Rezvan Zendehdel, Parviz Abdolmaleki, Fatemeh Javani Jouni, Mohammad Mazinani
Formaldehyde (FA) has given positive results for the genetic damage evaluated in human peripheral blood lymphocytes. Polymorphism plays a special role in the toxicity of chemicals. DNA damage in blood cells was evaluated in workers who were occupationally exposed to FA. This study tested the association of alcohol dehydrogenase III (ADH3) and manganese-superoxide dismutase (Mn-SOD) gene polymorphism, with DNA damage of peripheral blood lymphocytes. Gene polymorphisms were evaluated in 54 workers from melamine dinnerware workshops and 34 workers from dairy production workshops...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28894150/melatonin-enhances-the-developmental-competence-of-porcine-somatic-cell-nuclear-transfer-embryos-by-preventing-dna-damage-induced-by-oxidative-stress
#7
Shuang Liang, Yong-Xun Jin, Bao Yuan, Jia-Bao Zhang, Nam-Hyung Kim
Melatonin has antioxidant and scavenger effects in the cellular antioxidant system. This research investigated the protective effects and underlying mechanisms of melatonin action in porcine somatic cell nuclear transfer (SCNT) embryos. The results suggested that the developmental competence of porcine SCNT embryos was considerably enhanced after melatonin treatment. In addition, melatonin attenuated the increase in reactive oxygen species levels induced by oxidative stress, the decrease in glutathione levels, and the mitochondrial dysfunction...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28893613/genotoxic-effects-in-transformed-and-non-transformed-human-breast-cell-lines-after-exposure-to-silver-nanoparticles-in-combination-with-aluminium-chloride-butylparaben-or-di-n-butylphthalate
#8
J Roszak, K Domeradzka-Gajda, A Smok-Pieniążek, A Kozajda, S Spryszyńska, J Grobelny, E Tomaszewska, K Ranoszek-Soliwoda, M Cieślak, D Puchowicz, M Stępnik
In the present study genotoxic effects after combined exposure of human breast cell lines (MCF-10A, MCF-7 and MDB-MB-231) to silver nanoparticles (AgNP, citrate stabilized, 15 and 45nm by STEM, Ag15 and Ag45, respectively) with aluminium chloride, butylparaben, or di-n-butylphthalate were studied. In MCF-10A cells exposed for 24h to Ag15 at the concentration of 23.5μg/mL a statistically significant increase in DNA damage in comet assay (SSB) was observed. In the presence of the test chemicals the genotoxic effect was decreased to a level comparable to control values...
September 8, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28893201/determination-of-the-optimal-inspiratory-pressure-providing-adequate-ventilation-while-minimizing-gastric-insufflation-using-real-time-ultrasonography-in-chinese-children-a-prospective-randomized-double-blind-study
#9
Xiaowei Qian, Qiong Hu, Hang Zhao, Bo Meng, Yang Nan, Hong Cao, Qingquan Lian, Jun Li
BACKGROUND: During facemask ventilation, gastric insufflation is defined as appearance of a comet-tail or an acoustic shadow on ultrasonography. Ultrasonographic measurement of antral cross-section area (CSA) may reflect an insufflated antrum and provide interesting semi-quantitative data in regard to the gastric insufflation. This study aimed to determine the appropriate level of inspiratory pressure sufficient to provide adequate pulmonary ventilation with a lower occurrence of gastric insufflation during facemask pressure-controlled ventilation using real-time ultrasonography in paralyzed children...
September 11, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28893155/genotoxic-evaluation-of-different-sizes-of-iron-oxide-nanoparticles-and-ionic-form-by-smart-allium-and-comet-assay
#10
Şöhret Yüksek Kaygisiz, İbrahim Hakkı Ciğerci
In this study, the genotoxic potential of <50 nm, <100 nm iron oxide (Fe2O3) nanoparticles (IONPs) and ionic form were investigated using the wing somatic mutation and recombination test (SMART) and Allium and comet assays. In the SMART assay, different concentrations (1, 2, 5 and 10 mM) of NPs and ionic forms were fed to transheterozygous larvae of Drosophila melanogaster. No significant genotoxic effect was observed in <100 nm NPs and ionic form, while <50 nm IONPs showed genotoxicity at 1 and 10 mM concentrations...
January 1, 2017: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/28892876/effect-of-radiofrequency-radiation-emitted-from-2g-and-3g-cell-phone-on-developing-liver-of-chick-embryo-a-comparative-study
#11
Mary Hydrina D'Silva, Rijied Thompson Swer, J Anbalagan, Bhargavan Rajesh
INTRODUCTION: The increasing scientific evidence of various health hazards on exposure of Radiofrequency Radiation (RFR) emitted from both the cell phones and base stations have caused significant media attention and public discussion in recent years. The mechanism of interaction of RF fields with developing tissues of children and fetuses may be different from that of adults due to their smaller physical size and variation in tissue electromagnetic properties. The present study may provide an insight into the basic mechanisms by which RF fields interact with developing tissues in an embryo...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28891756/evaluation-of-distribution-redox-parameters-and-genotoxicity-in-wistar-rats-co-exposed-to-silver-and-titanium-dioxide-nanoparticles
#12
Airton da Cunha Martins, Lara Ferreira Azevedo, Cecília Cristina de Souza Rocha, Maria Fernanda Hornos Carneiro, Vinicius Paula Venancio, Mara Ribeiro de Almeida, Lusânia Maria Greggi Antunes, Rodrigo de Carvalho Hott, Jairo Lisboa Rodrigues, Abayomi T Ogunjimi, Joseph A Adeyemi, Fernando Barbosa
The increasing production of silver nanoparticles (AgNPs) and titanium dioxide nanoparticles (TiO2NPs) has resulted in their elevated concentrations in the environment. This study was, therefore, aimed at determining the distribution, redox parameters, and genotoxic effects in male Wistar rats that were treated with either AgNP or TiO2NP individually, as well as under a co-exposure scenario. Animals were exposed via oral gavage to either sodium citrate buffer (vehicle), 0.5 mg/kg/day TiO2NP, 0.5 mg/kg/day AgNP or a mixture of TiO2NPs and AgNPs...
September 11, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28889522/salidroside-a-chemopreventive-glycoside-diminishes-cytotoxic-effect-of-cisplatin-in-vitro
#13
Martina Zduriencikova, Dana Cholujova, Jozef Duraj, Maria Mastihubova, Vladimir Mastihuba, Elena Karnisova Potocka, Eliska Galova, Andrea Sevcovicova, Martina Klapakova, Eva Horvathova
Natural products represent the source or the inspiration for the majority of the active ingredients of medicines because of their structural diversity and a wide range of biological effects. Our aims in this study were (i) to synthesize enzymatically salidroside (SAL), the most effective phenylethanoid glycoside in Rhodiola species; (ii) to examine its antioxidant capacity using cell-free assays (reducing power, DPPH radicals scavenging and Fe(2+) -chelating assays); (iii) to assess its DNA-protective potential on plasmid DNA (DNA topology assay) and in HepG2 cells (comet assay) damaged by Fe(2+) ions and hydrogen peroxide, respectively; and (iv) to investigate the effects of SAL, cisplatin (CDDP) and combined treatments of SAL + CDDP on cell viability (MTT test), level of DNA damage (comet assay), proliferation, cell cycle (flow cytometry) and the expression of signalling molecules associated with cell growth and apoptotic pathways (western immunoblotting)...
September 10, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28888119/multiple-endpoints-gene-alteration-based-mega-assay-a-toxicogenomics-approach-for-water-quality-assessment-of-wastewater-effluents
#14
Toshikazu Fukushima, Hiroe Hara-Yamamura, Koji Nakashima, Lea Chua Tan, Satoshi Okabe
Wastewater effluents contain a significant number of toxic contaminants, which, even at low concentrations, display a wide variety of toxic actions. In this study, we developed a multiple-endpoints gene alteration-based (MEGA) assay, a real-time PCR-based transcriptomic analysis, to assess the water quality of wastewater effluents for human health risk assessment and management. Twenty-one genes from the human hepatoblastoma cell line (HepG2), covering the basic health-relevant stress responses such as response to xenobiotics, genotoxicity, and cytotoxicity, were selected and incorporated into the MEGA assay...
August 21, 2017: Chemosphere
https://www.readbyqxmd.com/read/28886471/dna-damage-by-2-3-7-8-tetrachlorodibenzo-p-dioxin-induced-p53-mediated-apoptosis-through-activation-of-cytochrome-p450-aryl-hydrocarbon-receptor
#15
Durgesh Nandini Das, Prashanta Kumar Panda, Niharika Sinha, Subhadip Mukhopadhyay, Prajna Parimita Naik, Sujit K Bhutia
2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD; polycyclic aromatic hydrocarbon) is a persistent and ubiquitous environmental contaminant that causes a wide variety of deleterious effects. In this study, the DNA damage and apoptotic activity induced by TCDD was examined using in silico and in vitro approaches. In silico study showed that conformational changes and energies involved in the binding of TCDD to cytochrome P450 1B1 (CYP1B1) were crucial for its target proteins. Moreover, activated TCDD had high affinity to bind with aryl hydrocarbon receptor (AhR), with a binding energy of -564...
August 18, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28886142/effects-of-ozone-exposure-on-human-epithelial-adenocarcinoma-and-normal-fibroblasts-cells
#16
Anna Poma, Sabrina Colafarina, Eleonora Aruffo, Osvaldo Zarivi, Antonella Bonfigli, Sebastiano Di Bucchianico, Piero Di Carlo
Previous studies show variable ozone cytotoxicity and genotoxicity in cell cultures, laboratory animals and humans directly exposed to tropospheric ozone. The aim of this study was therefore to investigate and compare the cyto and genotoxic effects of ozone using adenocarcinoma human alveolar basal epithelial cells A549 and normal human fibroblasts Hs27. A cell culture chamber with controlled atmosphere (a simulation reactor) was built to inject a flow of 120 ppb of ozone, which is two times the threshold value for the protection of human health, fixed by the EU legislation...
2017: PloS One
https://www.readbyqxmd.com/read/28884410/an-7-a-butyric-acid-prodrug-sensitizes-cutaneous-t-cell-lymphoma-cell-lines-to-doxorubicin-via-inhibition-of-dna-double-strand-breaks-repair
#17
Lilach Moyal, Neta Goldfeiz, Batia Gorovitz, Ada Rephaeli, Efrat Tal, Nataly Tarasenko, Abraham Nudelman, Yael Ziv, Emmilia Hodak
We previously found that the novel histone deacetylase inhibitor (HDACI) butyroyloxymethyl diethylphosphate (AN-7) had greater selectivity against cutaneous T-cell lymphoma (CTCL) than SAHA. AN-7 synergizes with doxorubicin (Dox), an anthracycline antibiotic that induces DNA breaks. This study aimed to elucidate the mechanism underlying the effect of AN-7 on Dox-induced double-strand DNA breaks (DSBs) in CTCL, MyLa and Hut78 cell lines. The following markers/assays were employed: comet assay; western blot of γH2AX and p-KAP1; immunofluorescence of γH2AX nuclear foci; Western blot of repair protein; quantification of DSBs-repair through homologous recombination...
September 8, 2017: Investigational New Drugs
https://www.readbyqxmd.com/read/28884318/implications-of-fals-mutations-on-sod1-function-and-oligomerization-in-cell-models
#18
Aline A Brasil, Rayne S S Magalhães, Mariana D C De Carvalho, Isabel Paiva, Ellen Gerhardt, Marcos D Pereira, Tiago F Outeiro, Elis C A Eleutherio
Among the familial forms of amyotrophic lateral sclerosis (fALS), 20% are associated with the Cu,Zn-superoxide dismutase (Sod1). fALS is characterized by the accumulation of aggregated proteins and the increase in oxidative stress markers. Here, we used the non-invasive bimolecular fluorescence complementation (BiFC) assay in human H4 cells to investigate the kinetics of aggregation and subcellular localization of Sod1 mutants. We also studied the effect of the different Sod1 mutants to respond against oxidative stress by following the levels of reactive oxygen species (ROS) after treatment with hydrogen peroxide...
September 7, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28882572/identification-of-essential-transcription-factors-for-adequate-dna-damage-response-after-benzo-a-pyrene-and-aflatoxin-b1-exposure-by-combining-transcriptomics-with-functional-genomics
#19
Evelyn Smit, Terezinha Souza, Danyel G J Jennen, Jos C S Kleinjans, Twan van den Beucken
DNA damage mediates widespread changes in transcription through activation or repression of transcription factors (TFs). However, the consequences of regulating specific TFs for the outcome of the DNA repair process remain incompletely understood. Here, we combined transcriptomics and TF binding prediction with functional genomics to identify TFs essential for adequate DNA repair in HepG2 liver cells after a non-cytotoxic dose of carcinogens benzo(a)pyrene (BaP) (2μM) and aflatoxin B1 (AFB1) (5μM). BaP and AFB1 induced a largely common transcriptional response, mediated by similar TFs...
September 4, 2017: Toxicology
https://www.readbyqxmd.com/read/28881654/fusion-between-m2-macrophages-and-cancer-cells-results-in-a-subpopulation-of-radioresistant-cells-with-enhanced-dna-repair-capacity
#20
Annelie Lindström, Kristine Midtbö, Lars-Gunnar Arnesson, Stina Garvin, Ivan Shabo
Cell fusion is a natural biological process in normal development and tissue regeneration. Fusion between cancer cells and macrophages results in hybrids that acquire genetic and phenotypic characteristics from both maternal cells. There is a growing body of in vitro and in vivo data indicating that this process also occurs in solid tumors and may play a significant role in tumor progression. However, investigations of the response of macrophage:cancer cell hybrids to radiotherapy have been lacking. In this study, macrophage:MCF-7 hybrids were generated by spontaneous in vitro cell fusion...
August 1, 2017: Oncotarget
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