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| Registros recuperados: 23 | |
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| Rainho,Claudia R. de; Kaezer,Andréa; Aiub,Claudia A.F.; Felzenszwalb,Israel. |
| N-nitroso compounds, such as N-nitrosodiethylamine (NDEA), can be formed by the reaction of secundary amines with nitrosating agents, and are suspected to be involved in tumors in humans. NDEA has been considered a weak carcinogen in genotoxic assays probably due to the inefficient nitrosamine activation system that is used and/or to the efficient repair system. In this work, we evaluated the sensibility of Allium cepa L. root tips and Tradescantia stamen hair mutation assay (Trad-SH) using Tradescantia pallida var. purpurea for NDEA (0.1; 0.5; 5 and 25mM) genotoxicity and mutagenicity induction. Allium cepa L. was treated with different NDEA concentrations for 3h, for 3 consecutive days, including negative control (distilled water) and positive control... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa; Genotoxicity; Mutagenicity; N-nitrosodiethylaine; Tradescantia pallida var. purpurea. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000400015 |
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| Sá,Rita de Cássia da Silveira e; Leite,Magda Narciso; Peters,Vera Maria; Guerra,Martha de Oliveira; Almeida,Reinaldo Nóbrega de. |
| This work makes an assessment of the dominant lethality of Mikania glomerata in male Wistar rats. Adult male received 1 mL of M. glomerata hydroalcoholic extract at a dose level of 3.3 g/kg body weight for 52 days and were mated with untreated females for seven weeks (group 1) or one week prior to the beginning of treatment and on the week following the end of treatment (group 2). The parameters analyzed were: number of implanted embryos, resorptions and corpora lutea; mating, gestation, preimplantation loss, implantation and resorption indexes (group 1); number of offspring and weaning animals (group 2). The administration of M. glomerata did not show any impairment of fertility and no significant difference in the parameters analyzed, suggesting an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mikania glomerata; Mutagenicity; Wistar rat. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000500009 |
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| Santos,Fabio V.; Mesquita,Suzana F.P.; Faria,Maria José S.S.; Poersh,Aline; Maciel,Maria Aparecida M.; Pinto,Angelo C.; Morimoto,Helena K.; Cólus,Ilce Mara S.. |
| The plant Croton cajucara Benth. (Euphorbiaceae) is a medicinal plant from the Brazilian Amazon where it is commonly known as sacaca. The principal compound isolated from C. cajucara stem-bark extracts is the clerodane-type diterpene trans-dehydrocrotonin (DCTN) which presents several biological activities, including antiulcerogenic, anti-inflammatory, hypoglycemic, antimutagenic and antitumoral activity. However, few studies have been carried out to evaluate the therapeutic potential of raw C. cajucara extracts. We studied mutagenicity and antimutagenicity effects of C. cajucara methanol extract using the micronucleus assay in bone marrow cells and the dominant lethal assay in mice submitted to subchronic treatments. The blood testosterone levels of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimutagenicity; Mutagenicity; Dominant lethal; Micronucleus; Croton cajucara; Medicinal plant. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100029 |
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| Rossato,Liana V.; Tedesco,Solange B.; Laughinghouse IV,Haywood D.; Farias,Júlia G.; Nicoloso,Fernando T.. |
| We evaluated the antiproliferative effect of infusions from Pluchea sagittalis using the Allium cepa test. Infusions in three concentrations (2.5, 5, and 25 g dm-3) of leaves cultivated in three environments (in vitro, acclimatized growth chamber, and field) were used. Six onion bulbs were used for each of the eight treatments, and the mitotic index was obtained from 6000 cells per treatment. In conclusion, leaf infusions of P. sagittalis cultivated in the field have a high antiproliferative activity, as well as the cultivation system influences the antiproliferative potential. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antiproliferative effect; Camphorweed; Cell cycle; Medicinal plant; Mutagenicity. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000400007 |
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| Gomes,Cristiano C.; Moreira,Leonardo M.; Santos,Vanessa J.S.V.; Ramos,Alfeu S.; Lyon,Juliana P.; Soares,Cristina P.; Santos,Fabio V.. |
| The use of artificial implants provides a palliative or permanent solution for individuals who have lost some bodily function through disease, an accident or natural wear. This functional loss can be compensated for by the use of medical devices produced from special biomaterials. Titanium alloy (Ti-6Al-4V) is a well-established primary metallic biomaterial for orthopedic implants, but the toxicity of the chemical components of this alloy has become an issue of concern. In this work, we used the MTT assay and micronucleus assay to examine the cytotoxicity and genotoxicity, respectively, of an extract obtained from this alloy. The MTT assay indicated that the mitochondrial activity and cell viability of CHO-K1 cells were unaffected by exposure to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomaterial; Cytotoxicity; Micronucleus; Mutagenicity; Ti-6Al-4V. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000100020 |
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| Attiq,Ali; Ashraf,Muhammad; Jalil,Juriyati; Javeed,Aqeel; Anjum,Aftab Ahmad; Ullah,Asad; Umair,Muhammad; Ali,Sarwat. |
| Abstract It is understood that drugs regardless of their order of administration can exhibit drug interactions. Established on the fact that treatment of hypertension may last for decades and prolong usage of multiple drug regimen may induce substantial pathophysiological changes. Hence, This study was designed to evaluate the possible synergistic toxic effects of anti-hypertensive (carvedilol), and anti-inflammatory drug (celecoxib) alone and in combinations. Well-established MTT assay, Single Cell Gel Electrophoresis (SCGE) and Ames assay were employed to evaluate the toxicity at cellular level. Results from MTT assay on Vero cell line revealed that drug combinations have more pronounced anti-proliferative activity with combine IC50 value of 13.7:47.8... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carvedilol; Celecoxib; Mutagenicity; Genotoxicity; Cytotoxicity.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502018000100622 |
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| Boriollo,Marcelo Fabiano Gomes; Resende,Marielly Reis; Silva,Thaísla Andrielle da; Públio,Juliana Yoshida; Souza,Luiz Silva; Dias,Carlos Tadeu dos Santos; Oliveira,Nelma de Mello Silva; Fiorini,João Evangelista. |
| The aim of this study was to evaluate the mutagenicity (clastogenicity/aneugenicity) of a glycolic extract of Ziziphus joazeiro bark (GEZJ) by the micronucleus assay in mice bone marrow. Antimutagenic activity was also assessed using treatments associated with GEZJ and doxorubicin (DXR). Mice were evaluated 24-48 h after exposure to positive (N-nitroso-N-ethylurea, NEU - 50 mg.kg-1 and DXR - 5 mg.kg-1) and negative (150 mM NaCl) controls, as well as treatment with GEZJ (0.5-2 g.kg-1), GEZJ (2 g.kg-1) + NEU and GEZJ (2 g.kg-1) + DXR. There were no significant differences in the frequencies of micronucleated polychromatic erythrocytes in mice treated with GEJZ and GEJZ + DXR compared to the negative controls, indicating that GEZJ was not mutagenic. Analysis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimutagenicity; Bone marrow; Doxorubicin; Micronucleus assay; Mutagenicity; Zizyphus joazeiro Mart. (raspa-de-Juá). |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000300016 |
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| Mata,Elizângela Faustino Da; Nascimento,Andrews Marques do; Lima,Ewelyne Miranda de; Kalil,Ieda Carneiro; Endringer,Denise Coutinho; Lenz,Dominik; Bissoli,Nazaré Souza; Brasil,Girlandia Alexandre; Andrade,Tadeu Uggere de. |
| Metabolism of anabolic androgenic steroids is important for its physiological effects. The aim was to investigate the effects of finasteride (a 5α-reductase inhibitor - 5αR) on cardiac and mutagenic effects promoted by ND. Male Wistar rats were separated into three groups: CONT, received the vehicles of ND and finasteride (Peanut oil+Saline); DECA group, received ND (20 mg.kg.week-1, i.m.), and DECAF received ND and finasteride (100 µg.kg-1, i.p.), for four weeks. After, hypertrophy, cytokines and Angiotensin Converting Enzyme (ACE) activity was determined in heart. Bone marrow was used for micronucleus evaluation. Treatment with ND promotes increase in cardiac hypertrophy, ACE activity and disbalance among pro- and anti-inflammatory cytokines, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dehydronandrolone; Finasteride; Mutagenicity; Cardiac Hypertrophy; Anabolic Androgenic Steroids. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100532 |
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| Dourado,Priscila Leocádia Rosa; Rocha,Monyque Palagano da; Roveda,Liriana Mara; Raposo Junior,Jorge Luiz; Cândido,Liliam Sílvia; Cardoso,Claudia Andréa Lima; Morales,Maria Aparecida Marin; Oliveira,Kelly Mari Pires de; Grisolia,Alexeia Barufatti. |
| Abstract This study aimed to evaluate DNA damage in animal and plant cells exposed to water from the Água Boa stream (Dourados, Mato Grosso do Sul, Brazil) by using bioassays, and to identify the chemical compounds in the water to determine the water quality in the area. Through the cytotoxicity bioassay with Allium cepa, using micronucleus test, and comet assay, using Astyanax altiparanae fish, the results indicated that biological samples were genetically altered. Micronuclei were observed in erythrocytes of A. altiparanae after exposure to water from locations close to industrial waste discharge. The highest DNA damage observed with the comet assay in fish occurred with the exposure to water from locations where the presence of metals (Cu, Pb, Cd, Ni)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa; Astyanax altiparanae; Mutagenicity; Cytotoxicity; Genotoxicity. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000100123 |
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| Thewes,Márcia Regina; Endres Junior,Delio; Droste,Annette. |
| The genotoxicity of untreated and treated sewage from two municipal wastewater treatment plants (WTP BN and WTP SJN) in the municipality of Porto Alegre, in the southern Brazilian state of Rio Grande do Sul, was evaluated over a one-year period using the Tradescantia pallida var. purpurea (Trad-MCN) bioassay. Inflorescences of T. pallida var. purpurea were exposed to sewage samples in February (summer), April (autumn), July (winter) and October (spring) 2009, and the micronuclei (MCN) frequencies were estimated in each period. The high genotoxicity of untreated sewage from WTP BN in February and April was not observed in treated sewage, indicating the efficiency of treatment at this WTP. However, untreated and treated sewage samples from WTP SJN had high... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Effluent; Micronucleus; Mutagenicity; Pollution; Trad-MCN. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000400023 |
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| Grisolia,Cesar Koppe; Oliveira,Adriano Barros Barata de; Bonfim,Helder; Klautau-Guimarães,Maria de Nazaré. |
| An evaluation of the genotoxicity of domestic sewage was carried out in a municipal wastewater treatment plant. The study was carried out using Allium cepa root tip cells through cytological parameters such as aberrant cells in anaphase-telophase and the mitotic index, and the fish species Oreochromis niloticus and Tilapia rendalli, through the index of micronuclei in peripheral erythrocytes. In the Allium test, each of the four stages of the wasterwater treatment routine was analyzed, i.e., crude sewage, primary effluent, secondary effluent, and tertiary effluent. O. niloticus and T. rendalli specimens were maintained in an aquarium continuously receiving the final effluent, in an open system, before being discharged into Lake Paranoá. For micronuclei... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa; Biomonitoring; Domestic sewage; Fish; Micronuclei; Mutagenicity. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000200026 |
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| Della Torre,A; Albuquerque,LBL; Farrapo,NM; Oshima-Franco,Y; Santos,MG; Tavares,RVS; Rodas,ACD; Dal Belo,CA; Cardoso,CRP; Varanda,EA; Groppo,FC; Lopes,PS. |
| Plathymenia reticulata Benth has an anti-inflammatory effect and is capable of neutralizing the neuromuscular blockade induced by Bothrops jararacussu or Crotalus durissus terrificus venoms, probably by precipitating venom proteins (an effect caused by plant tannins). The present study aimed to evaluate the mutagenic activity of P. reticulata by using the Salmonella mutagenicity assay (Ames test) and the micronucleus test in CHO-K1 cells. P. reticulata extract concentrations of 2.84, 5.68, 11.37, and 19.90 mg/plate were assayed by the Ames test using TA97a, TA98, TA100 and TA102 bacterial strains, with (+S9) and without (-S9) metabolic activation. Concentrations of 5, 1.6 and 0.5 μg/mL of P. reticulata extract were used for the micronucleus test. P.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ames test; Micronucleus test; Mutagenicity; Plant extract; Plathymenia reticulata. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992011000200010 |
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| Lopes,Marcela Silva; Suzuki,Brian Michio; Pereira,Glaécia Aparecida do Nascimento; Probst,Alexandra Christina; Ferreira,Rafaela Salgado; Oliveira,Júlia Teixeira de; Tecchio,Kimberly Brito; Santos,Fabio Vieira dos; Caffrey,Conor Robert; Oliveira,Renata Barbosa de. |
| ABSTRACT In the search for new anti-schistosomal agents, a series of fifteen ortho-nitrobenzyl derivatives was assayed in vitro against both the schistosomulum (somule) and adult forms of Schistosoma mansoni. Compounds 8 and 12 showed significant activity against somules at low micromolar concentrations, but none was active against adults. The SAR demonstrated that the compounds most active against the parasite were mutagenic to the human cell line RKO-AS45-1 only at concentrations 10- to 40-fold higher than the worm-killing dose. Given their electrophilicity, compounds were also screened as inhibitors of the S. mansoni cysteine protease (cathepsin B1) in vitro. Amides 5 and 15 exhibited a modest inhibition activity with values of 55.7 and 50.6 % at 100... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitro-aromatic; Schistosoma mansoni/ anti-schistosomal activity; Cathepsin B1; Mutagenicity. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502018000200613 |
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| Silva, Erick Leal da; Sales, Ila Monize Sousa; Santos, Fabelina Karollyne Silva dos; Peron, Ana Paula. |
| The present study evaluated the acute toxicity at the cellular level of processed juice ready for consumption Orange and Grape flavors, produced by five companies with significant influence on the food market of South American countries, especially in Brazil. This evaluation was performed in root meristem cells of Allium cepa L., at the exposure times of 24 and 48 hours, directly with marketed liquid preparations. Based on the results, it was found that fruit juices, of all companies considered, promoted significant antiproliferative effect to root meristems at the exposure time of 24 hours and resulted in at both exposure times, statistically significant number of mitotic spindle changes and chromosomal breaks. Therefore, under the study conditions, all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Industrialized juice; Cytotoxicity; Genotoxicity; Mutagenicity; Meristem tissue. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/33699 |
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| Registros recuperados: 23 | |
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