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Registros recuperados: 9
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BjussuLAAO-II induces cytotoxicity and alters DNA methylation of cell-cycle genes in monocultured/co-cultured HepG2 cells J. Venom. Anim. Toxins incl. Trop. Dis.
Machado,Ana Rita Thomazela; Aissa,Alexandre Ferro; Ribeiro,Diego Luis; Ferreira Jr.,Rui Seabra; Sampaio,Suely Vilela; Antunes,Lusânia Maria Greggi.
Abstract Background: The use of animal venoms and their toxins as material sources for biotechnological applications has received much attention from the pharmaceutical industry. L-amino acid oxidases from snake venoms (SV-LAAOs) have demonstrated innumerous biological effects and pharmacological potential against different cancer types. Hepatocellular carcinoma has increased worldwide, and the aberrant DNA methylation of liver cells is a common mechanism to promote hepatic tumorigenesis. Moreover, tumor microenvironment plays a major role in neoplastic transformation. To elucidate the molecular mechanisms responsible for the cytotoxic effects of SV-LAAO in human cancer cells, this study aimed to evaluate the cytotoxicity and the alterations in DNA...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Snake venom; Epigenetics; GADD45A; CCND1; CDKN1A.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992019000100305
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Cell migration inhibition activity of a non-RGD disintegrin from Crotalus durissus collilineatus venom J. Venom. Anim. Toxins incl. Trop. Dis.
Oliveira,Isadora Sousa de; Manzini,Rafaella Varzoni; Ferreira,Isabela Gobbo; Cardoso,Iara Aimê; Bordon,Karla de Castro Figueiredo; Machado,Ana Rita Thomazela; Antunes,Lusânia Maria Greggi; Rosa,José Cesar; Arantes,Eliane Candiani.
Abstract Background: In recent decades, snake venom disintegrins have received special attention due to their potential use in anticancer therapy. Disintegrins are small and cysteine-rich proteins present in snake venoms and can interact with specific integrins to inhibit their activities in cell-cell and cell-ECM interactions. These molecules, known to inhibit platelet aggregation, are also capable of interacting with certain cancer-related integrins, and may interfere in important processes involved in carcinogenesis. Therefore, disintegrin from Crotalus durissus collilineatus venom was isolated, structurally characterized and evaluated for its toxicity and ability to interfere with cell proliferation and migration in MDA-MB-231, a human breast cancer...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crotalus durissus collilineatus; Non-RGD disintegrin; Cell migration; Cell adhesion; Human breast cancer; MDA-MB-231.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992018000100319
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Coenzyme Q10 and its effects in the treatment of neurodegenerative diseases BJPS
Santos,Graciela Cristina dos; Antunes,Lusânia Maria Greggi; Santos,Antonio Cardozo dos; Bianchi,Maria de Lourdes Pires.
According to clinical and pre-clinical studies, oxidative stress and its consequences may be the cause or, at least, a contributing factor, to a large number of neurodegenerative diseases. These diseases include common and debilitating disorders, characterized by progressive and irreversible loss of neurons in specific regions of the brain. The most common neurodegenerative diseases are Parkinson's disease, Huntington's disease, Alzheimer's disease and amyotrophic lateral sclerosis. Coenzyme Q10 (CoQ10) has been extensively studied since its discovery in 1957. It is a component of the electron transportation chain and participates in aerobic cellular respiration, generating energy in the form of adenosine triphosphate (ATP). The property of CoQ10 to act as...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coenzyme Q10; Antioxidant; Oxidative stress; Neurodegenerative diseases.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502009000400002
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Comparative study of curcumin and curcumin formulated in a solid dispersion: Evaluation of their antigenotoxic effects Genet. Mol. Biol.
Mendonça,Leonardo Meneghin; Machado,Carla da Silva; Teixeira,Cristiane Cardoso Correia; Freitas,Luis Alexandre Pedro de; Bianchi,Maria Lourdes Pires; Antunes,Lusânia Maria Greggi.
Abstract Curcumin (CMN) is the principal active component derived from the rhizome of Curcuma longa (Curcuma longa L.). It is a liposoluble polyphenolic compound that possesses great therapeutic potential. Its clinical application is, however, limited by the low concentrations detected following oral administration. One key strategy for improving the solubility and bioavailability of poorly water-soluble drugs is solid dispersion, though it is not known whether this technique might influence the pharmacological effects of CMN. Thus, in this study, we aimed to evaluate the antioxidant and antigenotoxic effects of CMN formulated in a solid dispersion (CMN SD) compared to unmodified CMN delivered to Wistar rats. Cisplatin (cDDP) was used as the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Curcuma longa; Antigenotoxicity; Micronucleus test; DNA damage; Comet assay.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000400490
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Effects of H2O2, Fe2+ and Fe3+ on curcumin-induced chromosomal aberrations in CHO cells Genet. Mol. Biol.
Antunes,Lusânia Maria Greggi; Araújo,Maria Cristina Paiva; Dias,Francisca da Luz; Takahashi,Catarina Satie.
The effects of H2O2, Fe2+ and Fe3+ on curcumin-induced clastogenicity were evaluated in CHO cells. Curcumin combined with H2O2 did not increase the chromosomal aberrations more than expected based on a simple additive effect. In contrast, the combination of curcumin-Fe significantly decreased the total number of chromosomal aberrations and the number of abnormal metaphases. The clastogenicity of curcumin may be related to its pro-oxidant properties and its ability to generate free radicals.
Tipo: Info:eu-repo/semantics/article Palavras-chave: CHO; Chromosomal aberrations; Curcumin; Hydrogen peroxide; Mutagenesis.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000100028
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Genotoxicity assessment of Copaiba oil and its fractions in Swiss mice Genet. Mol. Biol.
Almeida,Mara Ribeiro; Darin,Joana D'Arc Castania; Hernandes,Lívia Cristina; Ramos,Mônica Freiman de Souza; Antunes,Lusânia Maria Greggi; Freitas,Osvaldo de.
Copaiba oil-resin, extracted from the trunk of Copaifera, and traditionally used in folk medicine in the treatment of various disorders, has been shown to be an effective antiinflamatory, antitumor, antitetanus, antiseptic and antiblenorrhagea agent. As, there are few studies evaluating its genotoxicity, this aspect of the commercial oil-resin, and its volatile and resinous fractions, were evaluated in mice by comet assay and micronucleus (MN) test. A single dose of oil resin, volatile or resin fractions (500; 1,000 or 2,000 mg/kg b.w.) was administered by gavage. The chemical compositions of Copaiba oil resin and its fractions was analyzed by gas chromatography. According to comet assaying, treatment with either one did not increase DNA damage, and as to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Copaiba oilresin; Genotoxicity; Comet assay; Micronucleus.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000400018
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In vivo cytogenetic effects of multiple doses of dietary vegetable oils Genet. Mol. Biol.
Evangelista,Cristina Márcia Wolf; Antunes,Lusânia Maria Greggi; Bianchi,Maria de Lourdes Pires.
Polyphenols are potent antioxidants that are particularly abundant in the Mediterranean diet, with olive oil being the main fat source. A number of investigations have reported that phenolic compounds found in dietary oils are antioxidants and could provide protective effects by inhibiting DNA oxidative damage. However, few studies have been published on the biological activity of vegetable oils, including their possible mutagenic/antimutagenic effects. The objective of the current study was to investigate the cytogenetic effects of multiple doses of four vegetable oils in rat bone marrow cells and to examine the possible antimutagenic effects of these oils in chromosomal damage induced by the antitumor drug cisplatin. These oils are consumed by humans and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antimutagenesis; Chromosomal aberrations; Vegetable oils; Wistar rats.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000400024
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Modulatory effects of the antioxidant ascorbic acid on the direct genotoxicity of doxorubicin in somatic cells of Drosophila melanogaster Genet. Mol. Biol.
Fragiorge,Edson José; Spanó,Mário Antônio; Antunes,Lusânia Maria Greggi.
In this study two different crosses involving the wing cell markers mwh and flr³ (standard (ST) cross and high bioactivation (HB) cross, the latter being characterized by a high constitutive level of cytochrome P450 which leads to an increased sensitivity to a number of promutagens and procarcinogens) were used to investigate the modulatory effects of ascorbic acid (AA) combined with the antitumor agent doxorubicin (DXR) in Drosophila melanogaster. We observed that the two different concentrations of AA (50 or 100 mM) had no effect on spots frequencies, while DXR treatments (0.2 or 0.4 mM) gave positive results for all types of spots, when compared to negative control. For marker-heterozygous (MH) flies, a protective effect was observed with the lower...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ascorbic acid; Doxorubicin; Drosophila melanogaster; Genotoxicity tests; Somatic mutation; Recombination test.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000300025
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Olive oil protects against chromosomal aberrations induced by doxorubicin in wistar rat bone marrow cells Genet. Mol. Biol.
Antunes,Lusânia Maria Greggi; Takahashi,Catarina Satie.
There is considerable interest in identifying dietary compounds which have the capacity to protect against chromosomal aberrations induced by antitumor agents. Fatty acids and their constituents are able to act as free radical scavengers. Doxorubicin (DXR) is an important chemotherapeutic agent, that also induces chromosome aberrations. Rat bone marrow cells treated simultaneously with olive oil (10 ml/kg body weight) and DXR (90 mg/kg body weight) developed significantly fewer chromosomal aberrations and abnormal metaphases than those treated with DXR alone.
Tipo: Info:eu-repo/semantics/other
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000200015
Registros recuperados: 9
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