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https://www.readbyqxmd.com/read/28323576/tat-rasgap317-326-enhances-radiosensitivity-of-human-carcinoma-cell-lines-in-vitro-and-in-vivo-through-promotion-of-delayed-mitotic-cell-death
#1
Pelagia Tsoutsou, Alessandro Annibaldi, David Viertl, Jonathan Ollivier, Franz Buchegger, Marie-Catherine Vozenin, Jean Bourhis, Christian Widmann, Oscar Matzinger
The synthetic peptide TAT-RasGAP317-326 has been shown to potentiate the efficacy of anti-cancer drugs. In this study, we explored the action of TAT-RasGAP317-326 when combined with radiation by investigating its radiosensitizing activity in vitro and in vivo. To investigate the modulation of intrinsic radiosensitivity induced by TAT-RasGAP317-326, clonogenic assays were performed using four human cancer cell lines, HCT116 p53(+/+) (ATCC: CCL-247), HCT116 p53(-/-), PANC-1 (ATCC: CRL-1469) and HeLa (ATCC: CCL-2), as well as one nontumor cell line, HaCaT (CLS: 300493)...
March 21, 2017: Radiation Research
https://www.readbyqxmd.com/read/28303511/macro-and-microelement-status-in-animal-and-human-hypertension-the-role-of-the-ace-gene-i-d-polymorphism
#2
Olena Pavlyushchik, Viktor Afonin, Svetlana Fatykhava, Polina Shabunya, Viktoryia Sarokina, Aliaksandr Khapaliuk
Genetic factors that predispose to hypertension may contribute to element disturbances observed in hypertensive patients. We tested the hypothesis that the deletion allele of the angiotensin-converting enzyme (ACE) gene is associated with element imbalances in hypertension. The concentrations of elements in genetically predisposed to hypertension rats (SHRs) and their controls (WKY rats) were also examined. ICP-MS was used for elemental analysis of human hair and animal fur. Genotyping was performed by PCR...
March 16, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28301808/impacts-of-discarded-coffee-waste-on-human-and-environmental-health
#3
A S Fernandes, F V C Mello, S Thode Filho, R M Carpes, J G Honório, M R C Marques, I Felzenszwalb, E R A Ferraz
Coffee is one of the most widely consumed beverages throughout the world. So far, many studies have shown the properties of coffee beverages, but little is known about its impacts on human and environmental health from its discard in the environment. So, the present work aims to investigate the mutagenic, genotoxic, cytotoxic and ecotoxic effects of leached (LE) and solubilized (SE) extracts from coffee waste, simulating the disposal of this residue in landfills and via sewage systems, respectively. Chemical analyses were also carried out...
March 13, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28296246/assessment-of-oral-cytological-features-in-smokers-and-nonsmokers-after-application-of-toluidine-blue
#4
Majid Sharbatdaran, Hamid Abbaszadeh, Sepideh Siadati, Mohammad Ranaee, Karimollah Hajian-Tilaki, Mahdieh Rajabi-Moghaddam
INTRODUCTION: Smoking is the most important etiologic factor of oral cancer. Exfoliative cytology is the best method for early detection of oral cancer. Toluidine blue staining is used for detection of oral premalignant and malignant lesions. The aim of this study was to enhance the accuracy of oral exfoliative cytology in evaluating dysplastic features using toluidine blue staining. METHODS AND MATERIALS: This clinical trials study was performed on 60 male smokers and nonsmokers without clinically oral lesion...
March 10, 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/28281072/frequencies-of-erythrocyte-nuclear-abnormalities-and-of-leucocytes-in-the-fish-barbus-peloponnesius-correlate-with-a-pollution-gradient-in-the-river-bregalnica-macedonia
#5
Katerina Rebok, Maja Jordanova, Valentina Slavevska-Stamenković, Lozenka Ivanova, Vasil Kostov, Trajče Stafilov, Eduardo Rocha
Integrated chemical and biomarker approaches were performed to estimate if there is ongoing toxicity in the River Bregalnica, namely connected with the presence of metals. The study was performed in water, sediment, and barbel (Barbus peloponnesius), collected in two seasons, from two suspected polluted and one reference zones. The water analyses revealed higher mean values in polluted sites for most of the examined physicochemical parameters. Metal concentrations (Zn, Cu, Cd, Mn, Pb, and Fe) in water were more or less constant, whereas in sediment, they were higher at the two polluted locations...
March 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28273639/effect-of-diterpenoid-kaurenoic-acid-on-genotoxicity-and-cell-cycle-progression-in-gastric-cancer-cell-lines
#6
Plínio Cerqueira Dos Santos Cardoso, Carlos Alberto Machado da Rocha, Mariana Ferreira Leal, Marcelo de Oliveira Bahia, Diego Di Felipe Ávila Alcântara, Raquel Alves Dos Santos, Natália Dos Santos Gonçalves, Sérgio Ricardo Ambrósio, Bruno Coêlho Cavalcanti, Caroline Aquino Moreira-Nunes, Claudia do Ó Pessoa, Rommel Mário Rodríguez Burbano
The goal of our study was to evaluate the effect of kaurenoic acid, obtained from copaiba oil resin, in gastric cancer (GC) and a normal mucosa of stomach (MNP01) cell lines. The compound was tested at concentrations of 2.5, 5, 10, 30 and 60μg/mL. Comet and micronucleus assays were used to access its potential genotoxicity in vitro. Moreover, we evaluated the effect of kaurenoic acid in cell cycle progression and in the transcription of genes involved in the control of the cell cycle: MYC, CCND1, BCL2, CASP3, ATM, CHK2 and TP53...
March 5, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28264623/cellular-detection-of-50%C3%A2-hz-magnetic-fields-and-weak-blue-light-effects-on-superoxide-levels-and-genotoxicity
#7
Anne Höytö, Mikko Herrala, Jukka Luukkonen, Jukka Juutilainen, Jonne Naarala
PURPOSE: We tested the hypothesis that the effects of 50 Hz magnetic fields (MFs) on superoxide levels and genotoxicity depend on the presence of blue light. MATERIALS AND METHODS: Human SH-SY5Y neuroblastoma cells were exposed to a 50 Hz, 100 μT MF with or without non-phototoxic level of blue light for 24 h. We also studied whether these treatments alter responses to menadione, an agent that induces mitochondrial superoxide (O2(• -)) production and DNA damage...
March 7, 2017: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/28261494/radioprotective-effects-of-cimetidine-on-rats-irradiated-by-long-term-low-dose-rate-neutrons-and-60-co-%C3%AE-rays
#8
Ding-Wen Jiang, Qing-Rong Wang, Xian-Rong Shen, Ying He, Tian-Tian Qian, Qiong Liu, Deng-Yong Hou, Yu-Ming Liu, Wei Chen, Xin Ren, Ke-Xian Li
BACKGROUND: Cimetidine, an antagonist of histamine type II receptors, has shown protective effects against γ-rays or neutrons. However, there have been no reports on the effects of cimetidine against neutrons combined with γ-rays. This study was carried out to evaluate the protective effects of cimetidine on rats exposed to long-term, low-dose-rate neutron and γ-ray combined irradiation (n-γ LDR). METHODS: Fifty male Sprague-Dawley (SD) rats were randomly divided into 5 groups: the normal control group, radiation model group, 20 mg/(kg · d) cimetidine group, 80 mg/(kg · d) cimetidine group and 160 mg/(kg · d) cimetidine group (10 rats per group)...
2017: Military Medical Research
https://www.readbyqxmd.com/read/28255318/celecoxib-mitigates-genotoxicity-induced-by-ionizing-radiation-in-human-blood-lymphocytes
#9
Seyed Jalal Hosseinimehr, Mahdieh Fathi, Arash Ghasemi, Seyedeh Nesa Rezaeian Shiadeh, Tayyeb Allahverdi Pourfallah
Ionizing radiation causes DNA damage and chromosome abbreviations on normal cells. The radioprotective effect of celecoxib (CLX) was investigated against genotoxicity induced by ionizing radiation in cultured human blood lymphocytes. Peripheral blood samples were collected from human volunteers and were incubated at different concentrations at 1, 5, 10 and 50 μM of CLX for two hours. At each dose point, the whole blood was exposed in vitro to 150 cGy of X-ray, and then the lymphocytes were cultured with mitogenic stimulation to determine the micronucleus frequency in cytokinesis blocked binucleated lymphocytes...
February 2017: Research in Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28255312/radioprotective-effects-of-lentil-sprouts-against-x-ray-radiation
#10
Abbas Haghparast, Kamran Mansouri, Samane Moradi, Fatemeh Dadashi, Saeed Eliasi, Mahdi Sobhani, Kambiz Varmira
The present study investigated the radioprotective efficacy of lentil (Lens culinaris) sprouts against X-ray radiation-induced cellular damage. Lentil seeds were dark germinated at low temperature and the sprout extract was prepared in PBS. Free radical scavenging of extract was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay and then the radioprotective potency of extract (0 to 1000 μg/mL) on the lymphocyte cells was determined by lactate dehydrogenases assay. Moreover, micronuclei assay was assessed using the cytokinesis-block technique...
February 2017: Research in Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28250908/assessment-of-correlation-between-chromosomal-radiosensitivity-of-peripheral-blood-lymphocytes-after-in-vitro-irradiation-and-normal-tissue-side-effects-for-cancer-patients-undergoing-radiotherapy
#11
Kamilė Guogytė, Aista Plieskienė, Rima Ladygienė, Žygimantas Vaisiūnas, Olga Sevriukova, Vinsas Janušonis, Julius Žiliukas
Patients receiving identical radiation treatments experience different effects, from undetectable to severe, on normal tissues. A crucial factor of radiotherapy related side effects is individual radiosensitivity. It is difficult to spare surrounding normal tissues delivering radiation to cancer cells during radiotherapy. Therefore, it may be useful to develop a simple routine cytogenetic assay which would allow the screening of a large number of individuals for radiosensitivity optimizing tumor control rates and minimizing severe radiotherapy effects with possibility to predict risk level for developing more severe early normal tissue adverse events after irradiation...
2017: Genome Integrity
https://www.readbyqxmd.com/read/28250647/methanol-extract-of-adansonia-digitata-leaf-protects-against-sodium-arsenite-induced-toxicities-in-male-wistar-rats
#12
Ayodeji Mathias Adegoke, Michael Adedapo Gbadegesin, Oyeronke Adunni Odunola
BACKGROUND: Human and animal population exposure to arsenic through the consumption of arsenic contaminated water is rampant in many parts of the world. Protective agents of medicinal plants origin could provide maximum protection against toxicities of various kinds. OBJECTIVE: The protective role of orally administered methanol extract of the leaves of Adansonia digitata (MELAD) on sodium arsenite (SA) - induced clastogenicity and hepatotoxicity in male Wistar rats was evaluated...
January 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28218683/antimutagenic-activity-of-ethanol-extract-of-rhaphidophora-pinnata-l-f-schott-leaves-on-mice
#13
Masfria, Sumaiyah, Aminah Dalimunthe
Rhaphidophora pinnata is suggested to prevent or treat cancer of genetic mutations. In this study, antimutagenic activity of an ethanol extract of Rhaphidophora pinnata leaves was evaluated by using a bone marrow micronucleus assay on mice. Male mice (20-30 g) were treated for sevendays with an ethanol extract of Rhaphidophora pinnata leaves at a dose of 500, 750 and 1000 mg/kg/day/orally, prior to exposure to cyclophosphamide (i.p. 30 mg/kg), 24 h after the end of the treatment. Antimutagenic activity was determined by the decrease of micronuclei (MN)...
February 17, 2017: Scientia Pharmaceutica
https://www.readbyqxmd.com/read/28216169/cytogenotoxicological-defense-of-retinyl-palmitate-in-the-front-damage-of-antineoplastics
#14
Ricardo Melo de Carvalho, Rai Pablo de Sousa Aguiar, Muhammad Torequl Islam, Marcus Vinicius Oliveira Barros de Alencar, Ana Maria Oliveira Ferreira da Mata, Antonio Lima Braga, Josemar José da Silva Júnior, Leonardo da Rocha Sousa, Rosália Maria Tôrres de Lima, Márcia Fernanda Correia Jardim Paz, João Marcelo de Castro E Sousa, Ana Amélia de Carvalho Melo-Cavalcante
Cancer, the multifactorial pathology and to date is the most lethal causes of death in the world. Cyclophosphamide (CPA) and doxorubicin (DOX) are the individually or combindly used two anticancer drugs. The antineoplastic drugs-mediated genetic instability can be overcome by using antioxidants. The study evaluated the cytogenotoxic modulatory potentials of retinyl palmitate (RP) caused by CPA and DOX in Swiss mice. For this, adult Mus musculus of either sex were divided equally regarding to the gender. Toxicogenetic effects were induced by the intraperitoneal (i...
February 16, 2017: Experimental and Toxicologic Pathology: Official Journal of the Gesellschaft Für Toxikologische Pathologie
https://www.readbyqxmd.com/read/28215813/a-comparative-approach-using-biomarkers-in-feral-and-caged-neotropical-fish-implications-for-biomonitoring-freshwater-ecosystems-in-agricultural-areas
#15
Carlos Eduardo Delfino Vieira, Patrícia Gomes Costa, Liziara Costa Cabrera, Ednei Gilberto Primel, Gilberto Fillmann, Adalto Bianchini, Claudia Bueno Dos Reis Martinez
The aim of this study was to investigate the responses of biomarkers in feral and caged fish and the capacity of these biomarkers to discriminate contamination levels along a stream located in an agricultural area in Southern Brazil. Specimens of the Neotropical fish, Astyanax altiparanae, were confined for 168h in three lakes along the stream. Additionally, during the weeks of in situ exposure, wild specimens of this species were collected from the same sites. Biochemical biomarkers were analyzed, such as phase I biotransformation enzyme 7-ethoxyresorufin-O-deethylase (EROD) and phase II biotransformation enzyme glutathione S-transferase, and we also determined hepatic and branchial levels of non-protein thiols (NPSH), oxidative damage such as lipid peroxidation (LPO), and acetylcholinesterase (AChE) activity in muscle and brain...
May 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28211323/evaluation-the-urban-atmospheric-conditions-in-different-cities-using-comet-and-micronuclei-assay-in-tradescantia-pallida
#16
Juliana Caroline Vivian Sposito, Bruno do Amaral Crispim, Amanda Izadora Romãn, Rosilda Mara Mussury, Joelson Gonçalves Pereira, Leonardo Oliveira Seno, Alexeia Barufatti Grisolia
In the present study, genotoxicity and mutagenicity were investigated in Tradescantia pallida exposed to vehicular traffic at different sites in a high-altitude tropical climate. During March, May, July, September, and November 2014, a comet assay and micronucleus bioassays were conducted on young inflorescences and leaves of T. pallida collected from twelve towns in the southern region of Mato Grosso do Sul with different amounts of vehicular traffic. Weather parameters (temperature, relative humidity and rainfall) were measured and vehicles were counted to determine traffic levels in each town...
May 2017: Chemosphere
https://www.readbyqxmd.com/read/28195382/contribution-of-atm-and-atr-kinase-pathways-to-p53-mediated-response-in-etoposide-and-methyl-methanesulfonate-induced-dna-damage
#17
Bin Sun, Susan M Ross, Sean Rowley, Yeyejide Adeleye, Rebecca A Clewell
p53 is a key integrator of cellular response to DNA damage, supporting post-translational repair and driving transcription-mediated responses including cell cycle arrest, apoptosis, and repair. DNA damage sensing kinases recognize different types of DNA damage and initiate specific responses through various post-translational modifications of p53. This study evaluated chemical specificity of the p53 pathway response by manipulating p53 or its upstream kinases and assessing the effect on DNA damage and cellular responses to prototype chemicals: etoposide (ETP, topoisomerase II inhibitor) and methyl methane sulfonate (MMS, alkylating agent)...
February 14, 2017: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/28187758/photodynamic-therapy-combined-to-cisplatin-potentiates-cell-death-responses-of-cervical-cancer-cells
#18
Laura Marise de Freitas, Rodolfo Bortolozo Serafim, Juliana Ferreira de Sousa, Thaís Fernanda Moreira, Cláudia Tavares Dos Santos, Amanda Martins Baviera, Valeria Valente, Christiane Pienna Soares, Carla Raquel Fontana
BACKGROUND: Photodynamic therapy (PDT) has proven to be a promising alternative to current cancer treatments, especially if combined with conventional approaches. The technique is based on the administration of a non-toxic photosensitizing agent to the patient with subsequent localized exposure to a light source of a specific wavelength, resulting in a cytotoxic response to oxidative damage. The present study intended to evaluate in vitro the type of induced death and the genotoxic and mutagenic effects of PDT alone and associated with cisplatin...
February 10, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28186195/cenp-a-chromatin-disassembly-in-stressed-and-senescent-murine-cells
#19
Sabrine Hédouin, Giacomo Grillo, Ivana Ivkovic, Guillaume Velasco, Claire Francastel
Centromeres are chromosomal domains essential for genomic stability. We report here the remarkable transcriptional and epigenetic perturbations at murine centromeres in genotoxic stress conditions. A strong and selective transcriptional activation of centromeric repeats is detected within hours. This is followed by disorganization of centromeres with striking delocalization of nucleosomal CENP-A, the key determinant of centromere identity and function, in a mechanism requiring active transcription of centromeric repeats, the DNA Damage Response (DDR) effector ATM and chromatin remodelers/histone chaperones...
February 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28185655/oxidative-stress-and-genotoxicity-biomarker-responses-in-tilapia-oreochromis-niloticus-exposed-to-environmental-concentration-of-1-nitropyrene
#20
Eugene T Bacolod, Seiichi Uno, Shiela S Villamor, Jiro Koyama
The present study aimed to assess whether environmental 1-nitropyrene (1-NP) concentration will induce genotoxicity and oxidative damages in tilapia, lives in estuarine and brackish water. Tilapia were exposed to waterborne 1-NP. Cellular antioxidant enzyme activity of glutathione peroxidase and oxidative damage, i.e., lipid peroxidation, protein and DNA oxidation were used as biomarkers of oxidative stress, while the micronucleus test was used for evaluation of chromosomal damage and was used as an indication of genotoxicity...
February 6, 2017: Marine Pollution Bulletin
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