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Toxicology ; 376: 66-74, 2017 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-27181935

RESUMO

The lasiodiplodan (LS) is a ß-(1→6)-d-glucan produced by the fungus Lasiodiplodia theobromae and some of the biological activities of LS were reported as hypoglycemic, anticoagulant, anti-proliferative and anticancer action; however, its effects on DNA instability and modulation of gene expression are still unclear. Aims of study were investigate the genotoxic effects of lasiodiplodan, and its protective activity against DNA damage induced by doxorubicin (DXR) and its impact on the expression of genes associated with DNA damage and inflammatory response pathways. Therefore, Wistar rats were treated (15 days) orally with LS (5.0; 10 and 20mg/kg bw) alone and in combination with DXR (15mg/kg bw; administrated intraperitoneally on 14th day) as well as their respective controls: distilled water and DXR. Monitoring of DNA damage was assessed by comet and micronucleus (MN) assays and gene expression was evaluated by PCR-Arrays. Treatments with LS alone did not induce disturbances on DNA; when LS was given in combination with DXR, comet and MN formations were reduced to those found in the respective controls. Moreover, LS was able to reduce the disturbances on gene expressions induced by DXR treatment, since the animals that receive LS associated with DXR showed no alteration in the expression of genes related to DNA damage response. Also, DXR induced several up- and down-regulation of several genes associated to inflammatory process, while the animals that received LS+DXR had their gene expression patterns similar to those found in the control group. In conclusion, our results showed that LS did not induce disturbances on DNA stability and significantly reduce the DNA damage and inflammation caused by DXR exposure. In addition, we give further information concerning the molecular mechanisms associated to LS protective effects which seems to be a promising nutraceutical with chemopreventive potential.


Assuntos
Análise Citogenética , Dano ao DNA/efeitos dos fármacos , Doxorrubicina/toxicidade , Polissacarídeos Fúngicos/farmacologia , Mediadores da Inflamação/antagonistas & inibidores , Zearalenona/análogos & derivados , Animais , Antibióticos Antineoplásicos/toxicidade , Análise Citogenética/métodos , Dano ao DNA/fisiologia , Relação Dose-Resposta a Droga , Expressão Gênica , Mediadores da Inflamação/metabolismo , Masculino , Substâncias Protetoras/farmacologia , Ratos , Ratos Wistar , Zearalenona/farmacologia
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