Title: Research on the Mechanism of Dioscin-Containing Serum Against Apoptosis of Cardiomyocytes Induced by Hydrogen Peroxide
Abstract:OBJECTIVE To discuss the mechanism of dioscin against apoptosis of cardiomyocytes induced by hydrogen peroxide through Serum Pharmacologic Method.METHODS The drug-containing serum [0.6 g(crude drug)·k...OBJECTIVE To discuss the mechanism of dioscin against apoptosis of cardiomyocytes induced by hydrogen peroxide through Serum Pharmacologic Method.METHODS The drug-containing serum [0.6 g(crude drug)·kg-1] was prepared by serum pharmacologic method.Cardiomyocytes from neonatal SD rats were cultured in Dulbecco Modified Eagle Medium(DMEM).The primary cultured cardiomyocytes were injured by hydrogen peroxide before giving the drug-containing serum with different concentrations.The cardiomyocyte viability was determined by MTT method.Morphological changes of cardiomyocytes were observed by fluorescence microscope after treating with the drug-containing serum at different concentrations.The anti-apoptotic effect of dioscin was indicated by detecting the activity of caspase-3.The protein expression of Bcl-2 and Bax were semi-quantified by Western-blot method after treating with the drug-containing serum.RESULTS The cardiomyocyte viability was elevated(P0.01) after being treated with different concentrates of drug-containing serum(0.4,0.8,1.2 g(crude drug)·kg-1,prepared from the original drug-containing serum).Typical apoptotic features of the cardiomyocytes such as membrane blebbing,cell shrinkage and detachment,and nucleus condensation and fragmentation were dose-dependently improved after being treated with drug-containing serum.The activity of caspase-3 decreased with the increasing concentration of drug.Western blot approach showed that the Bcl-2 level increased meanwhile the Bax decreased.CONCLUSION Dioscin could increase the viability of the primary cultured cardiomyocytes in hydrogen peroxide induced injury.It could also decrease the activity of caspase-3,improve nucleus condensation and fragmentation,increase Bcl-2 level and decrease the Bax level.Read More
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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