Effect of resvertrol on body mass and biochemical indexes of diabetic cataract model rats / 国际眼科杂志(Guoji Yanke Zazhi)

@#AIM: To study the effect of resveratrol on body mass and biochemical parameters of diabetic cataract model rats.<p>METHODS: Thirty rats were divided into blank group, model group and treatment group with 10 rats for each. Rats in the blank group were not treated. Rats in the model group and the treatment group were modeled. Rats in the treatment group were intervened with astragalol. Lens opacity, body mass, body growth and biochemical indexes of rats in each group were detected. The right eyeballs of rats in the three groups were stained with HE.<p>RESULTS: The rats in the blank group had transparent lens and no opacity; the degree of lens opacity and the overall score of cataract in the treatment group were better than those in the model group(<i>P</i><0.05); at 3rd and 5th weeks, the body weight and length of the rats in the treatment group were higher than those in the model group, and the levels of FPG and 2hPG were lower than those in the model group(<i>P</i><0.05); after 5wk, the biochemical indexes in the treatment group were significantly improved compared with those in the model group(<i>P</i><0.05). <p>CONCLUSION: Astragall can improve the degree of lens opacity in diabetic cataract rats, alleviate the effect of disease on the body weight of rats, regulate the level of blood sugar and biochemical indicators in rats, and alleviate the progress of cataract.

Role of SIRT3 in dysfunction of energy metabolism induced by deoxycho-lic acid in human colon NCM460 cells / 中国病理生理杂志

AIM: To investigate the effect of deoxycholic acid (DCA) on the energy metabolism in human normal colon epithelial NCM460 cells.METHODS: NCM460 cells was treated with DCA at 10, 30 and 100 μmol/L for 5 d, or DCA at 100 μmol/L for 3, 5 and 7 d.After treated with DCA at 100 μmol/L for 3 d, the cells were treated with resveratrol, the activator of sirtuin 3 (SIRT3), for the next 4 d.Adenosine triphosphate (ATP) production in the mitochondria and lactate acid level were detected.The protein expression of SIRT3 was determined by Western blot.RESULTS: DCA inhibited the ATP production, increased lactate acid level, and downregulated the protein expression of SIRT3 in a dose-and time-dependent manner.Resveratrol at 10 μmol/L reversed the effects of DCA on the NCM460 cells.CONCLUSION: DCA induces the dysfunction of energy metabolism in NCM460 cells, and the mechanism may be related with SIRT3.

Resvertrol Suppressing the Rapid Electrical Stimulation Incurred Oxidative Stress Injury in Neonatal Rats Cardiomyocytes With its Possible Mechanisms / 中国循环杂志

Objective: To explore the protective mechanism of resvertrol (RSV) suppressing the rapid electrical stimulation incurred oxidative stress injury in neonatal rats cardiomyocytes. Methods: The neonatal rats cardiac ifbroblasts and myocytes were isolated by double enzyme digestion and differential adhesion method, and the cardiomyocytes were randomly divided into 5 groups:①Control (CTR) group,②Rapid electrical stimulation (RES) group,③RES+APO group, cells were pretreated with NADPH oxidase inhibitor APO,④RES+RSV group,⑤RES+AIP group, cells were pretreated with CaMKII inhibitor AIP. In order to conifrm whether RSV protection was via MsrA-OX-CaMKⅡpathway, the cells were further divided into another 3 groups:①DMSO control group,②RSV+DMSO group,③RES+ RSV+DMSO group. The best dose of RSV was measured with Kit-8 by cardiomyocytes surviving condition, the optimal electrical stimulation time was detected with ELISA by Ang II level in conditioned medium. The level of reactive oxygen species (ROS) in cardiomyocytes was detected by flow cytometry, the protein expressions of MsrA, Nox4, Nox2, P22phox, OX-CaMK II and apoptosis related cleaved caspase-3 were observed by Western blot analysis.Results:①Compared with CTR group, RES group showed increased AngII secretion with increased protein expressions of Nox4, Nox2, P22phox, OX-CaMK II and cleaved caspase-3.②Compared with RES group, the RES+APO, RES+RSV, RES+AIP groups had decreased ROS level, the ROS was even lower in RES+RSV group.③Compared with RES group, the RES+APO, RES+RSV groups presented decreased protein expressions of Nox4, Nox2, P22phox, OX-CaMK II and cleaved caspase-3, while RES+AIP group only had decreased Nox2, OX-CaMK II and cleaved caspase-3.④Compared with DMSO control group, RES+ RSV+DMSO group had the lower level of cleaved caspase-3 expression. Conclusion: RSV has protective effect on rapid electrical stimulation incurred oxidative stress injury in neonatal rats cardiomyocytes, which might be via NADPH oxidase with the increased MsrA expression .